WO2012005158A1

WO2012005158A1 - Lighting device and method for manufacturing same

Info

Publication number: WO2012005158A1
Application number: PCT/JP2011/064975
Authority: WO
Inventors: 山田　誠; 悦昌藤田; 勇毅小林; 岡本　健; 秀謙尾方
Original assignee: シャープ株式会社
Priority date: 2010-07-06
Filing date: 2011-06-29
Publication date: 2012-01-12

Abstract

A lighting device is provided with: a ladder cord (6) on which lighting panels (10) are arranged and which can change the angle of the surfaces of the lighting panels (10); and a lifting/lowering cord (3) for adjusting the length of the arranged lighting panels (10). The ladder cord (6) is wiring configured so that the wiring can apply a voltage to the electrodes of organic EL elements provided to the lighting panels (10), the organic EL elements being light emitting elements.

Description

LIGHTING DEVICE AND MANUFACTURING METHOD THEREOF

The present invention relates to an integrated illumination device including a cord having a wiring function, and a manufacturing method thereof.

In recent years, light source devices using organic electroluminescence elements (hereinafter referred to as organic EL elements) have been attracting attention as one of planar light source devices. A light source device using an organic EL element has various excellent characteristics such as self-emission, wide viewing angle, and high-speed response.

An organic EL element generally has a structure in which an organic layer having a light emitting layer is disposed between a first electrode (anode) that is a transparent electrode and a second electrode (cathode) that is a reflective electrode. It is provided above. In addition to the light emitting layer, the organic layer generally has a hole transport layer, an electron transport layer, and the like. By applying a voltage of several volts between the first electrode and the second electrode of the organic EL element having such a configuration, holes injected from the first electrode into the organic layer, and from the second electrode to the organic layer Recombined with electrons injected into the light emitting layer. When holes and electrons recombine in the light emitting layer, excitons are generated, and light is emitted when the excitons return to the ground state. An organic EL element is an element that emits light by such a mechanism. In addition, the type that extracts light emitted from the organic EL element from the first electrode and the transparent substrate side is called a bottom emission type, and conversely, the type that extracts light emitted from the organic EL element from the second electrode side is called a top emission type.

In using an organic EL element for a light source device, a large area of the organic EL element is required. Here, a vacuum process is mentioned as one of the manufacturing methods of the organic EL element, but it is difficult to produce a large organic EL element in the vacuum process. This is because it is technically difficult to produce an organic EL element using a large substrate, and enormous tact time is required. Moreover, the cost for introducing a manufacturing apparatus for producing a large organic EL element and the running cost of the manufacturing apparatus are high. In particular, there are no reports on the production of organic EL elements on the 8th and 10th generation substrates.

On the other hand, as another manufacturing method of the organic EL element, a wet process can be cited. However, it is technically difficult to produce a large organic EL element in the wet process as well as the vacuum process. In addition, the technical development of the wet process is delayed for several years compared to the vacuum process, and its performance is inferior. Therefore, there are many problems in using the wet process as an alternative method of the vacuum process in the production of a large organic EL element.

In order to solve the above problems, a method of producing a large light source device by mounting a plurality of small-area organic EL elements produced by a medium-scale vacuum film forming apparatus has been recently adopted. According to this, a large light source device can be manufactured by a simple method, and the performance of the obtained light source device is high and the manufacturing cost is not high. In particular, a light source device in which a plurality of strip-shaped organic EL elements are mounted is called a blind illumination device or the like because of its shape, and is becoming widespread as a planar light source device.

Recently, blind-type lighting devices equipped with light-emitting elements other than organic EL elements have also been developed. A blind illumination device is a device that has an illumination function in addition to a so-called blind (sometimes referred to as a screen) function that can adjust the amount of light collected by being installed in a window. As an example of such a blind illumination device, Patent Document 1 discloses a blind illumination device in which a plurality of slats (= blades) mounted with a light emitter that emits light using electrical energy generated by a solar cell is integrated. It is disclosed. FIG. 15 is a perspective view of a main part for explaining the configuration of the blind device disclosed in Patent Document 1. The blind device 100 is a horizontal blind in which a large number of slats 102 shown in FIG. 15 are horizontally arranged. Each slat 102 is connected to a winding string 109 so that each slat 102 can be rolled up. A ladder cord 108 is coupled to the slat 102 and is configured to be rotatable forward and backward.

The slat 102 emits light when a solar cell 103 that converts solar energy into electric energy, a sheet-like polymer secondary battery 104 that stores the electric energy converted by the solar cell 103, and a voltage supply from the sheet-like polymer secondary battery 104. The sheet-like surface light emitter 105 to be laminated has a three-layer structure in which these are laminated in this order. The solar cell 103 includes a terminal for directly converting light energy into electric energy and storing the converted electric energy in the sheet-like polymer secondary battery 104. The sheet-like polymer secondary battery 104 has a solid electrolyte made of a solid polymer, accumulates the electric energy converted by the solar cell 103, and supplies the accumulated electric energy to the sheet-like surface light emitter 105. Terminal. The sheet-like surface light emitter 105 is an organic EL element or the like that uses an organic thin film for an electroluminescent layer. The sheet-like surface light emitter 105 is provided with a terminal for receiving voltage supply, and emits light when supplied with the electrical energy accumulated from the sheet-like polymer secondary battery 104.

Further, from each slat 102, an electric wire 106 for sending a signal for controlling light emission of the sheet-like surface light emitter 105 is disposed on the short side of the slat 102, and each electric wire 106 is connected to a switch 107. Has been.

Such a blind device 100 is installed in the vicinity of the indoor window side, the solar cell 103 side of each slat 102 is disposed in a direction in which sunlight can be received, and the solar energy of the received sunlight is converted into electrical energy. Is stored in the sheet-like polymer secondary battery 104, and light is emitted by supplying a voltage to the sheet-like surface light emitter 105.

Japanese Patent Publication “Japanese Patent Laid-Open No. 2001-82058” (published on March 27, 2001)

However, in the blind illumination device of Patent Document 1 shown in FIG. 15, the winding string 109 that supports each slat, the wiring 106 that applies voltage to each slat 102, and the ladder cord are provided separately. Yes. If these are separate bodies, not only the configuration becomes complicated, but especially when paying attention to the illumination function, the winding cord 109, the wiring 106, and the ladder cord are all members directly related to illumination. Therefore, it is not desirable that a large number of such configurations are disposed, because the illumination is disturbed.

The present invention has been made in view of the above-described conventional problems, and its purpose is to reduce the load on the wiring of each lighting panel (slat) and prevent the deterioration of the wiring material and the protective cover material of the wiring. Another object of the present invention is to provide an illuminating device that can be easily increased in area and a manufacturing method thereof.

That is, in order to solve the above-described problem, the lighting device according to the present invention
A plurality of lighting panels each having a light emitting element provided with an electrode and having a light emitting element that emits light when voltage or current is supplied to the electrode;
In the state where the plurality of illumination panels are held and the plurality of illumination panels are aligned in parallel in the major axis direction, the winding cord extends along the arrangement direction, and is arranged in the arrangement direction. A winding cord configured to be able to adjust the arrangement length of the lighting panel group extending along;
A support cord that varies the surface angle of the lighting panel while supporting the plurality of lighting panels;
A lighting device comprising:
The support cord has conductivity,
The electrode provided on the light emitting element is electrically connected to a conductive portion of the support cord.

According to the above configuration, the plurality of lighting panels are held by the winding cord. Further, the length of the winding cord can be changed. By changing the length of the winding cord, the length of the arranged lighting panels can be adjusted.

The multiple lighting panels are supported by a support cord. The support cord can be moved by an instrument such as a rod to vary the surface angle of the lighting panel relative to a certain direction. This support cord corresponds to a ladder cord used in a general blind device.

That is, in the lighting device according to the present invention, the arrangement position and the inclination of the plurality of lighting panels can be adjusted by moving the winding cord and the support cord with the instrument. In the multi-rod lighting device, for example, a rod or the like can be applied as the instrument.

Particularly noteworthy in the present invention is that the support cord is configured to supply voltage or current to the electrode of the light emitting element. That is, the support cord and the electrode of the light emitting element are electrically connected to each other.

Conventionally, a support cord that supports each lighting panel and a wiring cord that applies a voltage to each lighting panel are provided separately and outside the short side of the lighting panel. Since only one place is provided at the end of the panel as a wiring, a voltage drop phenomenon may occur and light emission spots may be generated. However, according to the above-described configuration of the present invention, a wiring function for supporting the lighting panel and supplying power to each lighting panel is added to the support cord that changes the inclination.

This makes it possible to simplify the configuration as compared with the conventional configuration in which the support cord and the wiring cord for applying a voltage to each lighting panel are separately configured. Further, the light emission of the lighting panel is not interrupted by separately providing the wiring cord, and the illuminance of the room where the lighting device is installed can be increased efficiently.

In addition to the above effects, by arranging a plurality of lighting panels on which a plurality of small light emitting elements (organic EL elements) are mounted, a large-area integrated lighting device can be realized and the manufacturing cost can be kept low.

Moreover, in order to solve said subject, the manufacturing method of the illuminating device concerning this invention
A plurality of lighting panels each having a light emitting element provided with an electrode and having a light emitting element that emits light when voltage or current is supplied to the electrode;
In the state where the plurality of lighting panels are held and the plurality of lighting panels are aligned in parallel in the major axis direction, the winding cords extend along the arrangement direction and are arranged. A winding cord configured to be able to adjust the length of the lighting panel;
A support cord that varies the surface angle of the lighting panel while supporting the plurality of lighting panels;
A method of manufacturing a lighting device comprising:
A lighting panel forming step for forming the lighting panel in which the light emitting element is disposed;
A supporting cord having conductivity is prepared so that the supporting cord can supply voltage or current to the electrode provided on the light emitting element, and a conductive portion of the supporting cord and an electrode of the light emitting element are prepared. And a connecting step of electrically connecting the two.

According to the above method, the wiring function for supplying power to each lighting panel is added to the support cord that changes the inclination of the plurality of lighting panels. Accordingly, it is possible to avoid blocking the light emission of the lighting panel by the wiring cord as compared with the case where a wiring cord is separately provided, and the room where the lighting device is installed can be illuminated with high illuminance.

Also, by arranging a plurality of lighting panels on which a plurality of small light emitting elements (organic EL elements) are mounted, a large-area integrated lighting device can be realized, and the manufacturing cost can be kept low.

Other objects, features, and superior points of the present invention will be fully understood from the following description. The advantages of the present invention will become apparent from the following description with reference to the accompanying drawings.

The lighting device of the present invention is as described above.
A plurality of lighting panels each having a light emitting element provided with an electrode and having a light emitting element that emits light when voltage or current is supplied to the electrode;
In the state where the plurality of illumination panels are held and the plurality of illumination panels are aligned in parallel in the major axis direction, the winding cord extends along the arrangement direction, and is arranged in the arrangement direction. A winding cord configured to be able to adjust the arrangement length of the lighting panel group extending along;
A support cord that varies the surface angle of the lighting panel while supporting the plurality of lighting panels;
A lighting device comprising:
The support cord has conductivity,
The electrode provided on the light emitting element is electrically connected to a conductive portion of the support cord.

Moreover, the manufacturing method of the lighting device of the present invention is as described above.
A lighting panel forming step for forming the lighting panel in which the light emission is disposed;
A supporting cord having conductivity is prepared so that the supporting cord can supply voltage or current to the electrode provided on the light emitting element, and a conductive portion of the supporting cord and an electrode of the light emitting element are prepared. And a connecting step of electrically connecting the two.

According to the above configuration, the support cord supporting each lighting panel has a function as wiring for supplying power to each lighting panel. Therefore, it is not necessary to lay dedicated wiring, and the wiring cord can illuminate the room where the lighting device is installed without blocking the light emitted from the lighting panel, and can increase the high illuminance. In addition, the range of designs is widened and can be diversified. This configuration enables low-cost manufacturing of the lighting device. In addition, while it is extremely difficult to manufacture a large-sized organic EL device, a large-area integrated lighting device can be realized by mounting a plurality of small light-emitting elements (organic EL elements), and the manufacturing cost can be reduced. .

It is the schematic which shows the organic electroluminescent illuminating device which concerns on one Embodiment of this invention. It is the schematic which shows the organic electroluminescent panel which concerns on one Embodiment of this invention. It is the schematic which shows the positional relationship of the illumination panel which concerns on one Embodiment of this invention, a ladder cord, and a raising / lowering cord. It is a figure which shows the cross section of the illumination panel which concerns on one Embodiment of this invention. It is a figure which shows the cross section of the organic EL element which concerns on one Embodiment of this invention. It is a figure which shows the example of 1 arrangement | positioning of the organic EL element which concerns on one Embodiment of this invention. A cross section of an organic EL lighting device in which a bottom emission type organic EL element is arranged on a first substrate according to an embodiment of the present invention, a top emission type organic EL element is arranged on a second substrate, and a light emitting portion is widened. FIG. It is a figure which shows the cross section of the organic electroluminescent illuminating device which has arrange | positioned the bottom emission type organic EL element to the 1st board | substrate and 2nd board | substrate which concerns on one Embodiment of this invention, and expanded the light emission part. An organic EL lighting device that can indirectly illuminate by arranging a top emission type organic EL element on a first substrate according to an embodiment of the present invention and extracting light reflected from the reflective second substrate. It is a figure which shows a cross section. It is a figure which shows the cross section of the organic electroluminescent illuminating device of double-sided light emission which concerns on one Embodiment of this invention. (A) in a figure is a figure which shows the process of preparing a support substrate, (b) in the figure is a figure which shows the process in which a 1st electrode is formed, (c) in a figure is organic It is a figure which shows the process of forming EL layer, (d) in a figure is a figure which shows the process of forming a 2nd electrode, (e) in the figure is a figure which shows the process of forming a protective film (F) in the figure is a diagram showing a step of cutting out the organic EL element. (A) in a figure is the schematic which shows the roll toe roll vapor deposition apparatus which forms an organic EL element, (b) in the figure is a figure which shows the state which has arrange | positioned the organic EL element on the 1st board | substrate. (C) in the drawing is a diagram showing a step of arranging the second substrate so as to cover the first substrate, and (d) in the drawing shows a plurality of steps between the head box and the bottom rail. It is a figure which shows the state by which the illumination panel of this is arrange | positioned. FIG. 6 illustrates an alternative form of one embodiment of the present invention. FIG. 6 illustrates another alternative form of one embodiment of the present invention. It is a figure which shows a prior art.

An organic electroluminescence lighting device (hereinafter referred to as an organic EL lighting device), which is an embodiment of a lighting device according to the present invention, will be described.

The organic EL lighting device according to this embodiment is a blind type lighting device, and in addition to being able to adjust the amount of light collected by the inclination angle of the slats (blades) in the same manner as a general blind (device), Since the slat is a lighting panel having a light emitting function, it can also be used as a lighting device. Therefore, the organic EL lighting device 1 according to the present embodiment includes, for example, office lighting, store lighting, facility lighting, stage lighting, stage lighting, outdoor lighting, house lighting, display lighting (amusement equipment, pachinko machines, vending machines, Or, it can be suitably used for refrigeration / refrigeration showcases, etc.), equipment / furniture lighting, evacuation guidance lighting, or local lighting.

(Configuration of organic EL lighting device)
FIG. 1 is a perspective view showing the configuration of the organic EL lighting device 1.

In order to realize the above-described function, the organic EL lighting device 1 according to the present embodiment includes a head box 2, a lifting / lowering cord (winding cord) 3, a bottom rail 4, a branch wiring 5, and a ladder as shown in FIG. It has a cord (support cord) 6, a rod (instrument) 7, and a lighting panel 10.

In the organic EL lighting device 1 according to the present embodiment, the lighting panel 10 corresponds to the slat (blade) described above. There are a plurality of lighting panels 10, each of which has a strip shape having the same configuration. All the lighting panels 10 are arranged in parallel with each other between the lighting panels 10 in the longitudinal direction between the head box 2 and the bottom rail 4. That is, the head box 2 is disposed on the side of the lighting panel 10 positioned at one end of the group of lighting panels 10 arranged, and the bottom rail 4 is disposed on the side of the lighting panel 10 positioned at the other end. . As shown in FIG. 1, the organic EL lighting device 1 according to the present embodiment is a type in which each lighting panel 10 is suspended horizontally (horizontal), that is, a Venetian type lighting device.

The organic EL lighting device according to the present embodiment is a type in which each lighting panel 10 is suspended horizontally (horizontal), that is, a Venetian type lighting device, but is not necessarily limited thereto. For example, a vertical type in which each lighting panel 10 is suspended vertically (vertical) can be employed. In the case of the vertical type, a plurality of lighting panels 10 can be slid and wound up to the left and right (horizontal direction). And the angle (rotation angle) of the said lighting panel 10 can be adjusted by rotating each lighting panel 10 right and left, and the organic EL lighting device 1 can be made into direct illumination or indirect illumination. Generally, in the case of a vertical blind, a cord corresponding to the lifting cord 3 of the Venetian type is called a drive cord, and a vertically held blade (vertical) corresponding to the Venetian type slat (lighting panel 10 held horizontally). The lighting panel 10) held in the box is called a louver.

In the organic EL lighting device 1 according to the present embodiment, the plurality of lighting panels 10 arranged in parallel are suspended and held by the lifting cord 3 extending from the head box 2. In other words, the plurality of lighting panels 10 are maintained in a state of being aligned in parallel in the longitudinal direction by being suspended by the lifting / lowering cord 3.

The position of the lifting / lowering cord 3 will be described with reference to FIG. FIG. 2 is a perspective view showing the positional relationship between one lighting panel 10, the lifting / lowering cord 3 and the ladder cord 6. As shown in FIG. 2, the lifting / lowering cords 3 are respectively disposed on one end side and the other end side in the major axis direction of the strip-shaped lighting panel 10. In addition, this invention is not limited to this, The raising / lowering cord 3 should just be provided in the outer periphery of the illumination panel 10 at least.

Next, the ladder code 6 shown in FIG. 2 has a function of supporting each lighting panel 10. The ladder cord 6 bridges between a pair of first cords extending from the head box 2 and connected to the bottom rail 4, and one first cord of the pair and the other first cord. And a plurality of second cords provided. The first cord of the pair and the first cord of the other are provided so as to face each other so as to sandwich the short axis of the strip-shaped lighting panel 10, and the second cord is just the lighting panel. The shape extends along 10 minor axes. Of course, the pair of first cords and the plurality of second cords provided so as to bridge them may be provided to face each other so as to sandwich the major axis of the strip-shaped lighting panel 10. I do not care. Furthermore, in the case where the illumination panel 10 is square, it may be provided to face either one of the axes.

As shown in FIG. 2, the ladder cord 6 is disposed at a plurality of positions where the pair of first cords of the ladder cord 6 has a predetermined interval at the end along the long axis direction of the lighting panel 10. It becomes the composition which is done. In FIG. 2, a pair of first cords are disposed at the center of the end side along the long axis direction of the illumination panel 10, and on the right side and the left side across this. Each lighting panel 10 is supported by being placed on each of the second cords, and in FIG. 2, the lighting panel 10 is placed at a total of three locations, the center and the right and left sides of the center. I support it.

The lifting / lowering cord 3 and the ladder cord 6 are connected to a rod 7 in the head box 2. The rod 7 is an example of an instrument that winds the lifting / lowering cord 3 and changes the inclination of the lighting panel 10. It goes without saying that the organic EL lighting device 1 can adopt not only a multi-rod type but also a cord and rod type or a cord type. Furthermore, not only a manual switching method using the rod 7, but also an electric operation method such as a remote wireless operation using a switch or a remote controller or a sensitive operation method using a sensor or the like is naturally included.

By pulling the grip 21 provided at the tip of the rod 7 connected to the tip of the lifting / lowering cord 3 in the head box 2, the lifting / lowering cord 3 is rolled up in the vertical direction. As a result, the bottom rail 4 and the plurality of lighting panels 10 is also wound up, and the arrangement length of the arranged lighting panels 10 group (length of the arranged portion) can be shortened. Thus, by winding up the lifting / lowering cord 3 at the tip of the rod 7, the arrangement positions of the plurality of lighting panels 10 can be adjusted.

Further, if the grip 21 at the tip of the rod 7 is rotated around the axis, the surface angle of each lighting panel 10 with respect to a certain direction can be changed. Specifically, by slightly winding one of the pair of first cords provided on the ladder cord 6 or feeding the other one, the inclination angle of the second cord changes. The surface angle of the supporting illumination panel 10 can be changed by placing it on the second cord.

Thus, in the organic EL lighting device 1 according to the present embodiment, the lifting / lowering cord 3 passes through the outer periphery of each lighting panel 10. Further, the illumination panel 10 is merely placed on the ladder cord 6, and the illumination panel 10 and the ladder cord 6 are merely connected to each other by the branch wiring 5. Therefore, the illumination panel 10 is not fixed to the lifting / lowering cord 3 and the ladder cord 6. Therefore, it is possible to incline the illumination panel 10 up and down by moving the ladder cord 6 with the grip 21 at the tip of the rod 7 to rotate the illumination panel 10 and adjusting the rotation angle. If the function which can adjust the angle of the said lighting panel 10 is provided, the said lighting panel 10 can be adjusted to a desired angle, and the organic electroluminescent illuminating device 1 can be a direct illumination or an indirect illumination. When the organic EL lighting device 1 is not used, each lighting panel 10 can be rolled up by pulling the grip 21 at the tip of the rod 7.

The lifting / lowering cord 3 that suspends the plurality of lighting panels 10 is configured to be wound into the head box 2 at the same time as the bottom rail 4 and the lighting panel 10 are wound up. That is, the lifting / lowering cord 3 is configured to be wound into the head box 2 by the rod 7 or to be fed out from the head box 2. On the other hand, a pair of first cords extending from the head box 2 to the bottom rail 4 and a bridge between one first cord of the pair and the other first cord were provided. A plurality of ladder cords 6 composed of a plurality of second cords are illuminated by a rod 7 by slightly winding one of the first cords into the head box 2 and feeding it out. The inclination of the panel 10 can be adjusted to an arbitrary angle such as horizontal or vertical.

The ladder cord 6 has conductivity and is configured to supply voltage or current to the electrode of the organic EL element provided in the lighting panel 10. This is a characteristic configuration. Specifically, the ladder cord 6 has a pair of first cords extending from the head box 2 and connected to the bottom rail 4 as described above, and a plurality of second cords. The cord has conductivity. As shown in FIG. 2, the branch wiring 5 is connected to the conductive portion of the first cord, and the branch wiring 5 is electrically connected to the electrode of the organic EL element. ing. The first cord of the ladder cord 6 is connected to a commercial power source provided in the head box 2. Note that the second cord does not need to have conductivity.

At this time, the contact point between the ladder cord 6 and the branch wiring 5 connected to the ladder cord 6 may be fixed as long as it is electrically connected, or may be made movable by sliding it. Also good. If the contact is fixed, power supply from the ladder cord 6 to the lighting panel 10 is stabilized. On the other hand, by configuring the contact so as to be movable, the lighting panel 10 can be slid when the plurality of lighting panels 10 are put together.

Also, the branch wiring 5 can be provided with a cover made of plastic or the like so as not to short-circuit the other wiring.

The ladder cord 6 has the strength and durability sufficient to support the lighting panel 10, the bottom rail 4, etc. and the weight of the ladder cord 6 itself, and the flexibility when the lifting / lowering cord 3 is wound up, as in general. It is required to have. Furthermore, in this patent, it is calculated | required to have electroconductivity, and it is necessary to have a structure which combines them.

The concrete structure of the first cord of the ladder cord 6 is basically an insulated wire, and is simply composed of a core material, a conductive material, and an insulating coating layer. Furthermore, there may be a protective coating layer. Of course, a plurality of these components may be carried by a single material.

As described above, the core material supports the lighting panel 10, the bottom rail 4, and the like, and the weight of the ladder cord 6 itself, and may or may not have conductivity by itself.

The former includes Fe and alloys containing it, and the latter includes various plastics and glass fibers.

The core material may be not only a new circle but also an elliptical material, or a flat band shape such as a film. Furthermore, not only one but also a plurality of bundles may be bundled.

The conductive material is formed on the core material using a technique such as plating, thick film printing, photolithography, and vacuum deposition.

Specific materials include those made of the above metals such as Ni, Co, Ag, Pd, Ru, Sn, Pb, etc. in the case of a plating method, and Sn—Pb in the case of an alloy. Thick film printing methods include Au, Ag, Pt, Ag—Pd, Ag—Pt, Ag—Pd—Pt, W, Cu, C, etc., and photolithography methods include Al, Cu, Mo, ITO, IZO, etc. Is mentioned.

Of course, you may combine the performance of both a core material and a conductive material. Specifically, a metal wire etc. are mentioned.

The insulating coating layer is a cover for preventing short circuit and the like, and includes polyethylene, polypropylene, polyurethane, various vinyl compounds (polyvinyl chloride, etc.), rubber (silicon rubber, etc.), and the like.

The configuration of the conductive ladder cord 6 is not limited to the above-described configuration, and glass braiding or the like may be performed to increase the durability, or conversely, the coating layer may be eliminated.

Hereinafter, the detailed configuration of the lighting panel 10 and the characteristic configuration of the present invention will be further described.

(Configuration of lighting panel 10)
FIG. 3 is a schematic view showing a configuration of a part of the illumination panel 10, and FIG. 4 is a cross-sectional view taken along the line AA ′ showing the illumination panel 10 shown in FIG. It is. In FIG. 4, for convenience of explanation, the lifting / lowering cord 3 and the ladder cord 6 are shown in addition to the lighting panel 10.

The illumination panel 10 is obtained by covering the organic EL panel 10 ′ shown in FIG. 3 with a second substrate. For convenience of explanation, FIG. 3 does not show the second substrate.

The organic EL panel 10 ′ shown in FIG. 3 has two organic EL elements 20 arranged on the first substrate 17. FIG. 3 shows a configuration in which the two organic EL elements 20 are arranged on the first substrate 17, but the present invention is not necessarily limited thereto. For example, one organic EL element 20 or three or more organic EL elements 20 may be arranged on the first substrate 17.

Further, as shown in FIG. 4, the lifting / lowering cord 3 is arranged at a location other than the center of the lighting panel 10 in order to take a large light emitting area of the lighting panel 10.

As shown in FIG. 4, the lighting panel 10 includes a first substrate 17 having a plurality of organic EL elements 20 and a second substrate 18 disposed so as to face the first substrate 17. The first substrate 17 and the second substrate 18 are connected by a resin 19.

Although details of the first substrate 17 and the second substrate 18 will be described later, the branch wiring 5 connected to the ladder cord 6 that supports the illumination panel 10 is formed on the first substrate 17 that is electrically connected to the organic EL element 20. The conductive wiring 9 is connected to the organic EL element 20 via the connection wiring 8.

Here, when a plurality of organic EL elements 20 are arranged, one ladder code 6 may have a plurality of wiring functions. For example, a single ladder cord 6 can be constituted by a plurality of wirings such as a positive wiring and a negative wiring. Conversely, the wiring function may be distributed using a plurality of ladder codes 6. As a result, the voltage supplied from each ladder cord 6 can be prevented from being lowered, and light emission spots due to the voltage drop can be prevented.

Hereinafter, each member constituting the lighting panel 10 will be described in detail.

(Configuration of the first substrate 17 and the second substrate 18)
At least one of the first substrate 17 and the second substrate 18 is made of a light transmissive material. As the material having optical transparency, for example, a transparent material such as a glass substrate or a resin substrate is applicable. Note that an opaque metal material or the like can be used in the case where one of the substrates is formed using a material that does not transmit light.

The first substrate 17 and the second substrate 18 may be made of a flexible material such as PET or PEN. If the first substrate 17 and the second substrate 18 are configured using a flexible material, the first substrate 17 and the second substrate 18 can be bent even when the organic EL lighting device 1 is bent. We can cope without.

Thus, the first substrate 17 and the second substrate 18 may have a flat plate shape or a shape having a curved surface. At this time, the light emission surface side of the organic EL lighting device 1 may be curved in a convex shape or may be curved in a concave shape.

When the light emitting surface side of the organic EL lighting device 1 is curved in a convex shape, the light of the organic EL lighting device 1 can be easily diffused, and the room or space where the organic EL lighting device 1 is installed Can be illuminated over a wide area.

On the contrary, when the light emission surface side of the organic EL lighting device 1 is curved in a concave shape, the light of the organic EL lighting device 1 can be easily condensed, and from the installation position of the organic EL lighting device 1 It is possible to illuminate a point or a surface that is close to each other in a concentrated manner.

In addition, on the surface of these flexible materials, an organic / inorganic hybrid layer or a multi-layered film of an organic layer and an inorganic layer is formed in order to increase gas barrier properties and mechanical strength and reduce gas permeability. May be.

In addition, although the 1st board | substrate 17 and the 2nd board | substrate 18 can be made into the rectangular flat plate shape of width 70mm, length 1000mm, and thickness 0.7mm, for example, it is not necessarily limited to this.

The first substrate 17 and the second substrate 18 are arranged so as to sandwich the organic EL element 20, and the first substrate 17 and the second substrate 18 are connected via a resin 19 such as a thermosetting resin or a UV curable resin. ing. A region surrounded by the first substrate 17 and the second substrate 18, that is, a region where the organic EL element 20 is sealed is adjusted, for example, under an inert gas such as nitrogen or argon, or under vacuum. In this way, oxygen or moisture from outside enters the organic EL layer 13 of the organic EL element 20 by filling the region between the substrates with an inert gas or by evacuating the region. Can be suppressed. Therefore, it is not necessary to perform a process for providing each organic EL element 20 with a gas barrier property.

It should be noted that a hygroscopic agent such as barium oxide may be blended in the region between both substrates. According to this, the periphery of the organic EL element 20 can be kept dry.

Also, it is possible to adopt a configuration in which the region between both substrates is filled with a heat radiation resin having high thermal conductivity. As the heat radiating resin, for example, insulating acrylic rubber, ethylene propylene rubber, or the like can be applied. According to this, since the heat radiation resin having high thermal conductivity is filled, the heat in the region between the two substrates can be efficiently released to the outside or the thermal uniformity can be increased.

Here, of the first substrate 17 and the second substrate 18 of each lighting panel, the substrate that is not on the light emitting surface side is preferably composed of a light reflective material or a material having a light reflective surface. Furthermore, the gap between the first substrate 17 and the second substrate 18 is preferably surrounded and sealed with a light reflective material or a material having a light reflective surface. According to this, the light emitted from the surface other than the light emitting surface of the organic EL element 20 is reflected on the wall surface of the illumination panel 10 (the wall surface of the illumination panel 10 surrounding the organic EL element 20). Therefore, the light leaking from the organic EL element 20 can be extracted more effectively.

(Outline of each wiring)
The conductive wiring 9 is formed on the surface of the first substrate 17 on the side where the organic EL element 20 is disposed. The conductive wiring 9 is disposed so as to extend in the width direction of the organic EL element 20.

As the conductive wiring 9, for example, ITO, IZO, alkali metal, alkaline earth metal, or the like is applicable. The conductive wiring 9 can have a width of about 2 mm, a length of 20 mm, and a thickness of about 150 mm, for example, but is not necessarily limited thereto.

Two of these conductive wirings 9 form a set, one of which is connected to the first electrode 12 (FIG. 5) of the organic EL element 20 and the other is connected to the second electrode 14 (FIG. 5). . A voltage can be applied to the organic EL element 20 by passing a current through the set of conductive wirings 9. It is preferable that each set of the conductive wirings 9 can be individually controlled. According to this, the organic EL element 20 connected to one set of conductive wiring 9 can be driven independently. Therefore, since each organic EL element 20 can be individually driven, it is possible to perform light control such as light emission intensity or color tone of the organic EL lighting device 1.

As will be described in detail later, in order to provide the organic EL lighting device 1 with dimming properties and toning properties, one organic EL element 20 is divided into a plurality of colors or a plurality of types having different emission colors. The organic EL element 20 can be used. When coating one organic EL element 20 in a plurality of colors, a plurality of conductive wirings 9 are arranged in parallel to the major axis direction.

For example, when white is toned with three types of organic EL elements 20 (red, green, and blue), the lighting rate of the red light emitting organic EL element (R) is 30%, and the green light emitting organic EL element (G) A voltage is preferably applied to each conductive wiring 9 so that the lighting rate is 22% and the lighting rate of the blue light-emitting organic EL element (B) is 48%. Here, the lighting rate means a ratio to the maximum current flowing through the anode or cathode of the lighting panel 10 (however, the duty ratio is 1/1). For example, if the maximum current flowing through the cathode is 200 mA, the lighting rate is 30% (60/200 = 0.3) when a current of 60 mA flows at a duty ratio of 1/1. In the above, an example in which toning is performed has been shown, but the present invention is not necessarily limited to this.

The conductive wiring 9 electrically connects the branch wiring 5 and the organic EL element 20 via the connection wiring 8. At this time, the connection wiring 8 is preferably formed of lead-free solder or silver paste.

Here, when the rectangular organic EL element 20 is used, an auxiliary electrode or an auxiliary wiring may be provided along the long side direction of the organic EL element 20. According to this, the voltage drop due to the resistance of the first electrode 12 and the second electrode 14 of the organic EL element 20 can be reduced, and the uneven emission can be suppressed. The auxiliary electrode may be provided over the entire circumference of the organic EL element, or may be provided partially at one end or both ends of the long side.

In addition to the ladder cord 6, the lifting / lowering cord 3 may have a wiring function. As a result, the supply of power is stabilized by securing a plurality of power supply sources. In addition, since power supply sources are prepared at short intervals, it is possible to prevent the occurrence of light emission spots due to a decrease in the voltage flowing from each cord.

Finally, details of the organic EL element 20 will be described with reference to FIG.

(Configuration of organic EL element 20)
5 is a cross-sectional view taken along the arrow line BB ′ shown in FIG. FIG. 5 does not show the first substrate 17 and the second substrate 18 for convenience of explanation.

As shown in FIG. 5, the organic EL element 20 has a configuration in which a first electrode 12, an organic EL layer 13, and a second electrode 14 are laminated in this order on a support substrate 11. Further, in order to protect both the electrodes and the organic EL layer 13, the protective layer 15 is provided so as to cover the surface of the second electrode 14, but this is not an essential configuration of the organic EL element 20.

In the organic EL element 20, by applying a voltage to the first electrode 12 and the second electrode 14, holes are injected from one electrode and electrons are injected from the other electrode. The organic EL layer 13 has a light emitting layer, and the organic EL element 20 emits light when the injected holes and electrons are recombined in the light emitting layer.

The organic EL element 20 can be formed into a rectangular flat plate having a width of about 50 mm, a length of 450 mm, and a thickness of about 0.7 mm, but is not necessarily limited thereto.

● Support substrate 11
The support substrate 11 is preferably made of an insulating material. The insulating material is, for example, a transparent plastic film such as stretched polypropylene (OPP), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), or polyphenylene sulfite (PPS). Thus, when an insulating material is used as the support substrate 11, the support substrate 11 can be employed as the insulating film. However, the present invention is not necessarily limited to this, and an insulating film may be separately provided on the support substrate 11. Further, a protective film such as a silicon oxide film is preferably formed on the support substrate 11. Thereby, it is possible to prevent the alkali oxide from being eluted from the inside of the support substrate 11.

Further, by using a flexible material such as a plastic film as described above, even if the portion (first substrate 17) where the organic EL element 20 is disposed is curved, it can be disposed without any problem. . According to this, when the light emission surface side of the organic EL element 20 is curved in a concave shape, the light of the organic EL element 20 can be easily diffused, and the room where the organic EL lighting device 1 is installed, or It becomes possible to illuminate the space extensively. On the contrary, when the light emitting surface side of the organic EL element 20 is curved in a convex shape, the light of the organic EL element 20 can be easily condensed and is close to the installation position of the organic EL lighting device 1. It becomes possible to illuminate a point or a surface intensively. Furthermore, according to the above configuration, even if the lighting panel 10 itself has a shape that is not curved, the above-described effects can be achieved by simply bending the organic EL element 20.
In addition, a configuration may be provided in which an adjustment unit that can appropriately adjust the curvature of the support substrate 11 is provided. According to this, as described above, when the light emitting surface side of the organic EL element 20 is curved in a convex shape, the light of the organic EL element 20 can be easily diffused, and the organic EL element 20 The room or space where the mounted organic EL lighting device 1 is installed can be illuminated in a wide range. On the other hand, when the light emitting surface side of the organic EL element 20 is curved in a concave shape, the light of the organic EL element 20 is illuminated. Can be easily condensed, and it is possible to intensively illuminate a point or a surface that is close to the installation position of the organic EL lighting device 1 mounted with the organic EL element 20. As an adjustment means, there exists an aspect mentioned later.

Moreover, since the support substrate 11 has flexibility, the organic EL element 20 can be produced using a roll-to-roll method. As a result, it is possible to reduce initial investment for introducing the apparatus, running cost, and the like. Furthermore, by packing the support substrate 11 from both sides with a substrate having low oxygen permeability or low water permeability, an organic multilayer film or an inorganic multilayer film is unnecessary, and an inexpensive organic EL element 20 can be manufactured. Is possible. However, the present invention is not necessarily limited to this. For example, the support substrate 11 may be made of a material such as glass.

In addition, as the support substrate 11, a light reflective material such as a metal film can be used. In this case, an insulating film such as silicon nitride (SiNx) having a thickness of about 500 nm is preferably formed on the surface by a synthetic resin such as an epoxy resin or a plasma CVD apparatus.

The support substrate 11 may further contain a light diffusing material. Examples of the light diffusing material include methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, normal butyl methacrylate, normal butyl methyl methacrylate, methyl methacrylate, methyl acrylate, a copolymer or a terpolymer. Acrylic particles such as polyethylene, polystyrene (PS), polypropylene and the like, or a copolymer of acrylic particles and olefin particles. Alternatively, after forming single polymer particles, multilayer multi-component particles or the like in which another type of monomer is coated on the upper layer also have light diffusibility, and such particles are also applicable.

Generally, light emitted from the organic EL element 20 is diffused and emitted. Therefore, usually, a microcavity (microresonator) structure is employed, and the light emitted from the organic EL element 20 is resonated and condensed by adjusting the optical path length. As a result, an improvement in luminous efficiency and an improvement in color purity can be realized, and light can have directivity and the like. However, in this embodiment, by adding the light diffusive material as described above to the support substrate 11, the emitted light passes through the light diffusing portion and is uniformly diffused and emitted from the light emitting surface. While improving the color purity and luminous efficiency of the EL lighting device 1, it is possible to realize a wide viewing angle.

● First electrode 12 and second electrode 14
Next, the first electrode 12 and the second electrode 14 will be described. One of the first electrode 12 and the second electrode 14 is a cathode, and the other electrode is an anode. Examples of the material for the anode include indium tin oxide (ITO) and indium zinc oxide (IZO).

On the other hand, examples of the material for the cathode include alkali metals or alkaline earth metals. From the viewpoint of stability, calcium films, aluminum films, laminated films of calcium films and aluminum films, magnesium alloy films, barium The film is preferably composed of a film, a barium compound film, a cesium film, a cesium compound film, a fluorine compound film, or the like.

When the organic EL element 20 is a bottom emission type, the first electrode 12 is formed of a light transmissive or light semi-transmissive material (transparent electrode), and the second electrode 14 is formed of a light reflective material. It is preferable to do. Conversely, when the organic EL element 20 is a top emission type, the first electrode 12 is formed of a light-reflective material, and the second electrode 14 is a light-transmitting or light-semi-transmissive material (transparent electrode or semi-transparent material). It is preferable to form with a transparent electrode. According to this, the light emitted from the organic EL element 20 is emitted from the transparent electrode side, and the light can be efficiently taken out of the element. Further, by making the electrode on the light extraction side a transparent electrode, light can be condensed by a microcavity (microresonator) effect. As a result, an improvement in luminous efficiency and an improvement in color purity can be realized, and light can have directivity and the like. Further, by using a reflective electrode for the electrode opposite to the light extraction side, even if the light emitted from the organic EL element 20 is emitted to the non-light emitting surface side, it is reflected by the electrode having light reflectivity, It is emitted from the light exit surface side. As a result, the utilization efficiency of the light emitted from the organic EL element 20 can be increased.

Since the organic EL element 20 has a light emission distribution whose light intensity is close to an isotropic Lambert distribution, the organic EL element 20 utilizes the microcavity effect obtained by sandwiching the organic layer between the reflective electrode and the transparent electrode. It is also possible to collect the light from the element 20. By using a transparent electrode on the light exit surface side and a reflective electrode on the opposite side, multiple reflection interference is repeated between the two electrodes to resonate and emphasize. The light emission luminance of the organic EL element 20 can be increased by extracting only light that matches the optical path length between the electrodes. Thereby, unnecessary light deviating from the optical path length is weakened, and the spectrum of the light extracted to the outside becomes steep, so that the color purity of the organic EL element 20 is improved. Moreover, directivity can be given to light. Here, in red light emission (R), green light emission (G), and blue light emission (B), since the wavelength of each light differs, it is necessary to adjust the film thickness of a transparent electrode or a semi-transparent electrode for every light source. .

● Protective layer 15
Examples of the material of the protective layer 15 include silicon oxynitride. For example, the protective layer 15 can have a thickness of about 100 nm, but is not necessarily limited thereto.

Note that a diffusion resin layer having a light diffusion function may be provided on the light extraction side surface of the organic EL element 20. The diffusion resin layer is a binder resin containing a plurality of light diffusion particles inside. Examples of the binder resin include acrylic resins, polyester resins, polyolefin resins, and polyurethane resins. Examples of the light diffusing particles include methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, normal butyl methacrylate, normal butyl methyl methacrylate, methyl methacrylate, methyl acrylate, a copolymer or a terpolymer. Acrylic particles, polyethylene, polystyrene (PS), olefin particles such as polypropylene, or a copolymer of acrylic particles and olefin particles. Alternatively, after forming single polymer particles, multilayer multi-component particles or the like in which another type of monomer is coated on the upper layer also have light diffusibility, and such particles are also applicable. In particular, the use of polymethyl methacrylate (PMMA) is preferred. By providing the diffusion resin layer in which such light diffusion particles are contained in the binder resin, it is possible to uniformly diffuse the light passing through the diffusion resin layer. Therefore, the wide viewing angle of the organic EL lighting device 1 is realized and the light extraction efficiency is increased, so that an effect of improving the luminance of the organic EL lighting device 1 is obtained. The diffusion resin layer can have a thickness of about 150 μm, for example, but is not necessarily limited thereto.

When providing the diffusion resin layer described above, the diffusion resin layer may be a diffusion plate. Examples of the diffusion plate include acrylic resin, polyester resin, polyolefin resin, polyurethane resin, crosslinked polymethyl methacrylate, or crosslinked polystyrene in which light diffusion particles are dispersed.

Furthermore, a wavelength conversion layer for converting the wavelength of light may be provided on the surface of the organic EL element 20 on the light extraction side. The wavelength conversion layer may be formed of, for example, an inorganic phosphor such as yttrium / aluminum / garnet (YAG), a known organic phosphor preferably used in an organic EL element, or another phosphor. preferable. By using the wavelength conversion layer, the light emitted from the organic EL element 20 can be converted into light having a desired wavelength. The wavelength conversion layer can have a thickness of about 100 μm, for example, but is not necessarily limited thereto.

Further, a circularly polarizing plate or a color filter can be provided on the light extraction side surface of the organic EL element 20. The circularly polarizing plate can circularly polarize the light emitted from the organic EL element 20 and suppress external light reflection. A circularly polarizing plate has a structure in which a retardation plate functioning as a 1 / 4λ plate is bonded to a linear polarizing plate, and the 1/4 retardation film is tilted by 45 degrees with respect to the absorption axis of the linear polarizing plate. It becomes a right-handed circularly polarizing plate. Conversely, if a 1/4 retardation film is tilted 135 degrees (-45 degrees) with respect to the absorption axis of the linear polarizing plate, it becomes a left-rotating circularly polarizing plate. For example, when a right rotating circularly polarizing plate is used, the light transmitted through the linearly polarizing plate becomes light that rotates clockwise when passing through the right rotating circularly polarizing plate, and when the light is reflected by a glass surface or the like, The direction of rotation is reversed and the light turns counterclockwise and enters the right rotating circularly polarizing plate again. In this way, the clockwise rotating circularly polarizing plate transmits only clockwise light, absorbs counterclockwise light, and finally the reflected light of outside light can be made substantially zero. Utilizing this property, the circularly polarizing plate can remove external light reflection in the organic EL lighting device 1.

The retardation plate is a film having a birefringence and can be produced by stretching a plastic film in a specific direction. Any material that is transparent and can be stretched may be used. For example, a polycarbonate polymer, a polyester polymer, a polysulfone polymer, a polystyrene polymer, a polyphenylene oxide polymer, or a polyolefin polymer can be used.

Further, by using the color filter, it is possible to emit only light having a desired wavelength from the light emitted from the organic EL element, and to obtain the effect of suppressing and reducing the reflection of external light. The light emitted from the organic EL element 20 has a wide spectrum shape and a long tail on the long wavelength side compared to the light emitted from the inorganic EL element, which causes a problem when trying to reproduce high color purity. However, when the color filter is used in combination, the spectrum of the unnecessary region is cut, and the spectrum having a narrow width (approximately half the width) can be obtained. In addition, the suppression and reduction effect of external light reflection of the color filter is not as high as that of the circularly polarizing plate. However, when the color filter is used, the unnecessary region wavelength of the light emitted from the organic EL element 20 is removed. And the effect of increasing the color purity can be exhibited at the same time. Furthermore, since the light extraction efficiency is higher than that of the circularly polarizing plate, the light emission efficiency of the organic EL element 20 is relatively high, and the introduction into the organic EL lighting device 1 is very effective.

● Organic EL layer 13
The organic EL layer 13 only needs to include at least a light emitting layer, and a plurality of hole injection layers, hole transport layers, electron blocking layers, light emitting layers, hole blocking layers, electron transport layers, and electron injection layers. It should just be comprised from. For example, a three-layer structure in which a hole transport layer, a light emitting layer, and an electron transport layer are stacked may be used. Or a five-layer structure in which a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer are laminated, or a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, Examples thereof include a seven-layer structure in which a hole blocking layer, an electron transport layer, and an electron injection layer are stacked.

Contrary to the structure in which the function is separated for each layer as described above, the charge transporting and light emitting layer has a high hole transporting property and electron transporting property and has a good balance of holes and electrons. The organic EL layer 13 may be configured from a single layer structure.

According to this, both charge transport materials can propagate the holes injected from the anode and the electrons injected from the cathode to the light emitting region with (1) high mobility and high balance, (2) Since the energy difference between the highest occupied level / the lowest empty level (HOMO / LUMO) is sufficiently large (about 3 eV) and is a wide gap material, high luminous efficiency can be obtained.

Even in the case of using both of the charge transport materials described above, in the case of a single layer configuration, the hole and electron injection properties may be inferior. It has an injection region and an electron injection region.

As described above, the organic EL layer 13 may have at least a light emitting layer. The light emitting layer is formed of a dual charge transporting material in which a host material such as a hole transporting material or an electron transporting material is doped with a light emitting dopant.

Examples of the host material include 4,4'-N, N'-dicarbazolylbiphenyl (hereinafter referred to as CBP), which has the following chemical structural formula.

In the case of producing a light emitting layer that emits red light, a red light emitting dopant is used as the light emitting dopant. Examples of the red light-emitting dopant include bis (1- (phenyl) isoquinolinato-N, C2 ′) iridium (III) (acetylacetonate) (hereinafter referred to as (piq) ₂ Ir (acac), which has the following chemical structural formula. )) And other red phosphorescent dopants. A red light emitting layer is obtained by co-evaporating the red light emitting dopant and the host material. The red light emitting layer can have a thickness of about 5 nm, for example, but is not necessarily limited thereto.

When a light emitting layer that emits green light is produced, a green light emitting dopant is used as the light emitting dopant. Examples of the green light emitting dopant include green phosphorescent light emitting dopants such as (2-phenylpyridine) iridium (hereinafter, Ir (ppy) ₃ ), which has the following chemical structural formula. A green light emitting layer is obtained by co-evaporating the green light emitting dopant and the host material. The green light emitting layer can have a thickness of about 20 nm, for example, but is not necessarily limited thereto.

Also, when a light emitting layer emitting blue light is produced, a blue light emitting dopant is used as the light emitting dopant. Examples of the blue light-emitting dopant include blue phosphorescent light-emitting dopants such as iridium (III) bis [(4,6-difluorophenyl) -pyridinate-N, C2] picolinate (hereinafter referred to as FIrpic). A blue light-emitting layer is obtained by co-evaporating the blue light-emitting dopant and the host material. For example, the blue light-emitting layer can have a thickness of about 30 nm, but is not necessarily limited thereto.

As described above, the organic EL layer 13 can be provided with a hole injection layer, a hole transport layer, an electron blocking layer, an electron injection layer, an electron transport layer, and a hole blocking layer.

The hole injection layer has a function of efficiently injecting holes received from the anode into the light emitting layer. As the hole injecting material, for example, 4,4 ′, 4 ″ -tris (N-3-methylphenyl-N-phenylamino) triphenylamine, a starburst amine having the following chemical structural formula ( Hereinafter, m-MTDATA) and the like can be mentioned. The hole injection layer can have a thickness of about 30 nm, for example, but is not necessarily limited thereto.

The hole transport layer has a function of efficiently transporting holes received from the anode to the light emitting layer. Examples of the hole transporting material include aromatic tertiary amines such as 4,4 ′, 4 ″ -tri (N-carbazolyl) triphenylamine (hereinafter, TCTA), which have the following chemical structural formula. Compounds. The hole transport layer can have a thickness of about 10 nm, for example, but is not necessarily limited thereto.

The electron blocking layer has a function of blocking the movement of electrons to the anode side. As an electron blocking material, for example, 4,4′-bis- [N, N ′-(3-tolyl) amino-3,3′-dimethylbiphenyl (hereinafter referred to as HMTPD) having the following chemical structural formula Etc. The electron blocking layer can have a thickness of about 10 nm, for example, but is not necessarily limited thereto.

The electron injection layer has a function of efficiently injecting electrons received from the cathode into the light emitting layer. Examples of the electron injecting material include lithium fluoride (LiF). The electron injection layer can have a thickness of about 1 nm, for example, but is not necessarily limited thereto. When LiF is used for the electron injection layer, it is preferable to use a cathode in which magnesium and silver are co-deposited at a ratio of 1: 9.

The electron transport layer has a function of efficiently transporting electrons received from the cathode to the light emitting layer. As the electron transporting material, for example, tris (8-hydroxyquinoline) aluminum (hereinafter referred to as Alq ₃ ) having a chemical structural formula shown below, or 3-phenyl-4 ( 1'-naphthyl) 5-phenyl-1,2,4-triazole (hereinafter TAZ) and the like. The electron transport layer can have a thickness of about 30 nm, for example, but is not necessarily limited thereto.

The hole blocking layer has a function of blocking the movement of holes to the cathode side. Examples of the hole blocking material include 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (hereinafter referred to as BCP), which has the following chemical structural formula. The hole blocking layer can have a thickness of about 10 nm, for example, but is not necessarily limited thereto.

In addition, when providing an electron blocking layer and a hole blocking layer, it is preferable to form either one of both blocking layers by a vapor deposition polymerization method. According to this, a stable electron blocking layer and hole blocking layer can be formed by a simple method called vapor deposition polymerization.

In addition, when the electron blocking layer and the hole blocking layer are composed of both charge transporting materials, the both charge transporting materials constituting the electron blocking layer are the lowest free orbit of the both charge transporting materials constituting the light emitting layer. The first condition that the lowest empty orbit is higher, and the charge transporting material constituting the hole blocking layer is lower than the highest occupied orbital of both charge transporting materials constituting the light emitting layer. More preferably, at least one of the second conditions of having an occupied track is satisfied. According to this, an electron blocking layer for blocking the movement of electrons and a hole blocking layer for blocking the movement of holes are provided with a light emitting layer formed of both charge transport materials interposed therebetween. Therefore, since the holes propagated from the anode and the electrons propagated from the cathode are confined in the light emitting layer, the probability that the holes and electrons recombine in the light emitting layer is increased, and the driving voltage of the organic EL element 20 is increased. Can be reduced.

In addition, since the probability of recombination of holes and electrons in the light emitting layer is increased, the internal quantum yield can be improved and the light emission efficiency can be improved. However, it is not always necessary to provide both the electron blocking layer and the hole blocking layer, and the probability of recombination of holes and electrons can be sufficiently increased by having only one of them. Therefore, it is possible to provide the organic EL element 20 that realizes high luminance, high efficiency, and long life.

The organic EL layer 13 may further include a charge generation layer. In this case, for example, a hole transport layer, a light emission layer, a charge generation layer, a hole transport layer, a light emission layer, and an electron transport layer are included. The organic EL layer 13 is formed by stacking in this order. That is, the organic EL element 20 including a plurality of light emitting layers can be formed. By forming an equipotential surface between the light emitting layers adjacent to each other with the charge generation layer, the driving voltage is increased while the flowing current is reduced, and an excellent light emission lifetime can be obtained. Examples of the material for the charge generation layer include vanadium pentoxide (V ₂ O ₅ ). The charge generation layer can have a thickness of about 20 nm, for example, but is not necessarily limited thereto.

(Arrangement of organic EL element 20)
The illumination panel 10 used in this embodiment is basically composed of an organic EL element 20 that emits white light. However, a plurality of types of organic EL elements 20 that emit light having different wavelengths may be used in order to provide the organic EL lighting device 1 with dimming properties and toning properties.

Here, the organic EL elements 20 may have the same shape or different shapes. For example, in the case of the illumination panel 10 including the organic EL elements 20 that emit light of different wavelengths, the length or width of the organic EL elements 20 may be different for each emission color. In this case, the organic EL lighting device 1 that is superior in terms of power consumption, light emission luminance, and light emission lifetime can be realized by designing the light emitting dopant in an arbitrary width in consideration of characteristics such as light emission efficiency of each light emitting dopant.

For example, when three types of organic EL elements 20 that emit light of different wavelengths are used, the red light emitting organic EL element (R), the green light emitting organic EL element (G), and the blue light emitting organic EL element (B) The organic EL element 20 can be used. The RGB organic EL elements 20 may be set as one set, and the set may be repeatedly arranged on the first substrate 17 as shown in FIG. FIG. 6 is a diagram illustrating an arrangement example of the organic EL element 20. In this figure, in order to make the layout of the organic EL element 20 easier to understand, the figure is simplified.

For example, when two types of organic EL elements 20 that emit light having different wavelengths are used, an organic EL element 20 of an orange light-emitting organic EL element and a blue light-emitting organic EL element can be used. Here, in order to emit light of a plurality of colors with one organic EL element, one organic EL element 20 may be separately applied to a plurality of colors by a method such as mask patterning. According to this, it is possible to provide the organic EL lighting device 1 with dimming property and toning property with one organic EL element 20.

When arranging the organic EL elements 20 of a plurality of colors on the lighting panel 10, the organic EL elements 20 of the respective emission colors may be arranged in other layouts in addition to the parallel arrangement. For example, when three types (RGB) of organic EL elements 20 are used, the RGB organic EL elements 20 may be set as one set, and the RGB organic EL elements 20 may be arranged in an L shape in each set. You may arrange | position radially.

In the above description, the configuration in which the organic EL elements 20 are juxtaposed is shown. However, the present invention is not necessarily limited thereto. For example, the organic EL element 20 having a tandem structure in which light emitting layers of the respective colors are stacked may be used.

In the organic EL element 20, the support substrate 11 may be disposed so as to be in contact with the first substrate 17, or the second electrode 14 on the opposite side to the support substrate 11 is disposed so as to be in contact with the first substrate 17. May be. In addition, when the 2nd electrode 14 of the organic EL element 20 is arrange | positioned so that the 1st board | substrate 17 may be contacted, the 2nd electrode 14 becomes a lower electrode and the 1st electrode 12 becomes an upper electrode. Therefore, when providing an insulating film for insulating the conductive wiring 9 on the first substrate 17 and the organic EL element 20, the insulating film is provided between the second electrode 14 and the first substrate 17. Further, when the organic EL element 20 has the protective layer 15, the protective layer 15 may be adopted as an insulating film, but is not necessarily limited to this. An insulating film may be separately provided between the substrate 17.

(Other arrangement examples of the organic EL element 20)
The configuration in which the organic EL element 20 is disposed on the first substrate 17 has been described above. However, the present invention is not particularly limited thereto. For example, the organic EL element 20 is disposed on both the first substrate 17 and the second substrate 18. May be. Further, the configuration in which the organic EL element 20 is arranged so that the support substrate 11 and the first substrate 17 are in contact with each other is shown, but the present invention is not particularly limited thereto, and the second electrode 14 side is the first substrate 17 or the second substrate. The structure which touches 18 may be sufficient. This will be described with reference to FIGS. FIG. 7 is a view showing a cross section of the organic EL lighting device 1 in which the bottom emission type organic EL element 20 is arranged on the first substrate 17 and the top emission type organic EL element 20 is arranged on the second substrate 18. FIG. 8 is a view showing a cross section of the organic EL lighting device 1 in which the bottom emission type organic EL elements 20 are arranged on the first substrate 17 and the second substrate 18. FIG. 9 is a view showing a cross section of the organic EL lighting device 1 in which the top emission type organic EL element 20 is arranged on the first substrate 17. In the above drawings, the protective layer 15 is not shown in order to simplify the drawing.

For example, as shown in FIG. 7, the support substrate 11 of the bottom emission type organic EL element 20 is disposed so as to contact the first substrate 17, and the support substrate 11 of the top emission type organic EL element 20 is the second substrate 18. You may arrange | position so that it may touch. At this time, a material having transparency is used for the first substrate 17, and a material having light reflectivity is used for the second substrate 18. Accordingly, light from the organic EL element 20 disposed on the first substrate 17 is emitted from the first substrate 17 side, and light from the organic EL element 20 disposed on the second substrate 18 is also emitted from the first substrate 17 side. Will be released. Further, it is preferable that the arrangement position of the organic EL element 20 on the first substrate 17 and the arrangement position of the organic EL element 20 on the second substrate 18 do not overlap each other. According to this, the substantial light emission area of the organic EL lighting device 1 can be increased. As shown in FIG. 8, the second substrate 18 may be disposed so that the second electrode 14 of the bottom emission type organic EL element 20 is in contact therewith. According to this, light from the organic EL element 20 disposed on the second substrate 18 is emitted from the first substrate 17 side.

In the above description, the light emission surface of the organic EL element 20 is arranged on the first substrate 17 so as to face the first substrate 17 side. For example, as shown in FIG. You may arrange | position so that the 2nd board | substrate 18 side may be faced. That is, the support substrate 11 of the top emission type organic EL element 20 may be disposed so as to be in contact with the first substrate 17. In this case, the light emitted from the organic EL element 20 is reflected by the second substrate 18 having light reflectivity, and the reflected light is emitted from the first substrate 17 side. That is, the organic EL lighting device 1 can be an indirect lighting device. The first substrate 17 may be disposed so that the second electrode 14 of the bottom emission type organic EL element 20 is in contact therewith.

Furthermore, as shown in FIG. 10, both the first substrate 17 and the second substrate 18 are made of a transparent material, and the light of the organic EL element 20 is transmitted from both the first substrate 17 side and the second substrate 18 side. May be released. According to this, the double-sided organic EL lighting device 1 can be obtained. At this time, the bottom emission type organic EL element 20 is disposed on the first substrate 17 and the second substrate 18, but is not particularly limited thereto.

In the above, the configuration in which the first substrate 17 and the second substrate 18 are arranged to face each other has been shown, but the present invention is not necessarily limited thereto. For example, the organic EL element 20 may be sealed in a space configured in a columnar shape, a rectangular parallelepiped shape, a spherical shape, or the like by three or more substrates.

(Method for manufacturing organic EL element 20)
Below, the manufacturing method of the organic electroluminescent illuminating device 1 which concerns on this embodiment is demonstrated. First, a method for manufacturing the organic EL element 20 will be described with reference to FIG. FIG. 11A is a diagram illustrating a process of preparing the support substrate 11. FIG. 11B is a diagram illustrating a process of forming the first electrode 12. FIG. 11C is a diagram illustrating a process of forming the organic EL layer 13. FIG. 11D is a diagram illustrating a process of forming the second electrode 14. FIG. 11E is a diagram illustrating a process of forming the protective layer 15. FIG. 11F is a diagram illustrating a process of cutting off the organic EL element 20. Below, although the manufacturing method of the organic EL element 20 is demonstrated using a specific example, it is not necessarily limited to this.

First, as shown to (a) of FIG. 11, film tape 11 ', such as PET film used as the support substrate 11, is prepared, the 1st electrode 12, the organic electroluminescent layer 13, and 2nd on the said film tape 11'. The electrodes 14 and the like are sequentially formed. At this time, a plurality of first electrodes 12 are formed on the film tape 11 ′, and the organic EL layer 13, the second electrode 14, and the like are stacked on each first electrode 12. The manufacture of the organic EL element 20 is preferably performed in an environment where the moisture concentration is low, such as a glove box under dry air.

Next, as shown in FIG. 11B, an ITO film (for example, a thickness of 150 nm) is formed by sputtering, and a part of the ITO film is etched by laser ablation to form the first electrode 12. Form. Then, the surface of the first electrode 12 is cleaned by ultrasonic cleaning and UV-ozone cleaning. In the ultrasonic cleaning, for example, cleaning is performed for about 10 minutes using acetone or isopropyl alcohol (IPA) as a cleaning liquid. In the UV-ozone cleaning, for example, cleaning is performed for about 30 minutes using a UV-ozone cleaning machine. When the support substrate 11 (film tape 11 ') is formed of a metal plate or the like, the surface of the metal plate is subjected to a plasma CVD process or the like to perform an insulation process.

Subsequently, as shown in FIG. 11C, an organic EL layer 13 is formed on the first electrode 12 by vacuum deposition. Specifically, a starburst amine m-MTDATA (for example, a thickness of 30 nm) is formed on the first electrode 12 as a hole injection layer. Further, a TCTA (for example, a thickness of 10 nm) is formed as a hole transport layer (electron blocking layer) on the hole injection layer. Note that the film thickness is preferably measured by a crystal resonator.

Next, a green light emitting layer, a blue light emitting layer, and a red light emitting layer are laminated in this order on the hole transport layer as a light emitting layer. These light emitting layers can be achieved by two-component co-evaporation. For example, the green light emitting layer co-deposits CBP (host material) and Ir (ppy) ₃ (green light emitting dopant) while controlling the respective evaporation rate ratios to be 0.92: 0.08. For example, the film thickness is 5 nm.

Further, the blue light emitting layer is co-deposited, for example, by controlling CBP (host material) and FIrpic (blue light emitting dopant) so that the respective evaporation rate ratios are 0.92: 0.08. For example, the film thickness is 30 nm.

Similarly, for example, the red light emitting layer is formed by, for example, forming CBP (host material) and (piq) ₂ Ir (acac) (red light emitting dopant) with a deposition rate ratio of 0.92 respectively. : Co-deposited by controlling to be 0.08. For example, the film thickness is 5 nm.

Subsequently, a BCP (for example, a thickness of 10 nm) is formed as a hole blocking layer and an Alq (30 nm) is formed as an electron transport layer on the light emitting layer. Then, LiF (0.5 nm) is formed as an electron injection layer on the electron transport layer.

Next, as shown in FIG. 11 (d), an aluminum film (for example, a thickness of 100 nm) is formed on the electron injection layer by a vacuum deposition method to form the second electrode. Thereafter, as shown in FIG. 11E, a SiON film (for example, a thickness of 100 nm) is formed as the protective layer 15 on the second electrode 14. In addition, it is preferable that the above organic EL layer 13 is heat-treated or irradiated with ultraviolet rays at the same time as or after vapor deposition of at least one material constituting the organic EL layer 13 under vacuum conditions. According to this, the substrate is heated by heat treatment or ultraviolet irradiation, the reaction is accelerated, (1) vapor deposition polymerization can be completed, and (2) the degree of polymerization can be controlled. Furthermore, the molecular orientation in the deposited film can be controlled by heat treatment. In the case of ultraviolet irradiation, it is more preferable to perform heat treatment after the ultraviolet irradiation. According to this, the substrate is heated by ultraviolet irradiation, the reaction is accelerated, (1) vapor deposition polymerization can be completed, and (2) the degree of polymerization can be controlled. Then, the molecular orientation in the deposited film can be controlled by performing the heat treatment thereafter. Furthermore, it is also possible to form a pattern by transferring a pattern using a mask at the time of ultraviolet irradiation and removing a portion that has not been cured after ultraviolet irradiation.

Finally, as shown in FIG. 11 (f), the film tape 11 'is divided into a predetermined length, and the organic EL elements 20 are cut one by one.

When using organic EL elements 20 of a plurality of colors, each organic EL element 20 is shifted in the major axis direction by making the length of the margin from the light emitting region to the end of the organic EL element 20 non-uniform. Even when it is provided, the positions of the light emitting regions can be aligned in the long axis direction.

(Manufacturing method of the organic EL lighting device 1)
As described above, in the present embodiment, a plurality of first electrodes 12 are formed on the film tape 11 ′, and the organic EL layer 13 and the second electrode 14 are sequentially stacked on each first electrode 12. ing. The formation of the organic EL layer 13, the second electrode 14, and the like uses a roll-to-roll vapor deposition apparatus (reel-to-reel vapor deposition apparatus). This will be described with reference to FIG. FIG. 12A is a schematic view showing a roll-to-roll vapor deposition apparatus for forming the organic EL element 20 according to this embodiment. FIG. 12B is a diagram showing a state in which the organic EL element 20 is disposed on the first substrate 17. FIG. 12C is a diagram illustrating a process of manufacturing the lighting panel 10 by arranging the second substrate 18 so as to cover the first substrate 17. FIG. 12D is a diagram illustrating a state in which a plurality of lighting panels 10 are disposed between the head box 2 and the bottom rail 4.

The film tape 11 'on which the plurality of first electrodes 12 are formed is installed in a roll-to-roll vapor deposition apparatus as shown in FIG. The roll-to-roll vapor deposition apparatus includes two rolls 22 for winding the film tape 11 ', and a plurality of forming portions 23 for forming the organic EL layer 13, the second electrode 14, and the like.

For example, the film tape 11 ′ is sent out at a constant speed of 1 m / sec so as to pass through each forming portion 23. Thereby, when the film tape 11 ′ passes through each forming portion 23, the organic EL layer 13 and the second electrode 14 are sequentially deposited on the first electrode 12 by the forming portion 23, and finally the film A plurality of layers in which the first electrode 12, the organic EL layer 13, and the second electrode 14 are laminated on the tape 11 ′ are formed.

After winding the film tape 11 ′ on which the first electrode 12, the organic EL layer 13, and the second electrode 14 are stacked on a roll 22, the film tape 11 ′ wound on the roll 22 is divided into a predetermined length. To do. In this way, a plurality of organic EL elements 20 can be produced. Here, it is preferable to inspect the produced organic EL element 20 by a known inspection method to remove defective products.

Next, as shown in FIG. 12B, the produced organic EL element 20 is arranged on the first substrate 17 to form the organic EL panel 10 '. At this time, the conductive wiring 9 is previously formed on the first substrate 17 by using a method such as a vacuum evaporation method using a mask, a sputtering method, or a photolithography technique. Then, for example, the organic EL element 20 disposed on the first substrate 17 is connected to the conductive wiring 9 via the connection wiring 8 formed of lead-free solder or the like.

Subsequently, as shown in FIG. 12C, the second substrate 18 is fixed on the first substrate 17 so as to cover the first substrate 17 on which the organic EL element 20 is arranged. For example, a UV curable resin can be used for fixing the second substrate 18. As the UV curable resin, for example, epoxy resin such as 30Y-332 manufactured by ThreeBond Co., Ltd. can be applied.

Finally, as shown in FIG. 12D, a plurality of lighting panels 10 are arranged between the head box 2 and the bottom rail 4. Specifically, the lighting panel 10 is placed on the second cord of the ladder cord 6 extending from the head box 2, and the branch wiring 5 and the conductive wiring 9 connected to the ladder cord 6 are connected to the connection wiring 8 (FIG. Connect via 4). Thereafter, the lifting / lowering cord 3 is arranged near the short side of the lighting panel. In this way, the organic EL lighting device 1 can be manufactured.

In addition, as above-mentioned, it is preferable to produce the organic EL element 20 using a roll-to-roll vapor deposition apparatus in this embodiment. This is because the roll-to-roll vapor deposition apparatus does not increase in size and has excellent material utilization efficiency. However, the present invention is not particularly limited to this, and the organic EL element 20 may be manufactured using another device.

(Operational effect of the present embodiment)
As described above, in the organic EL lighting device 1 according to this embodiment, the ladder cord 6 has conductivity, and supplies voltage or current to the electrodes of the organic EL elements provided in the lighting panel 10. It is configured to be able to. Conventionally, a ladder cord that supports each lighting panel and a wiring cord that applies a voltage to each lighting panel are provided separately. Therefore, this has produced a negative effect in which the wiring configuring the lighting device is arranged on the front and side surfaces as seen from the light emitting surface of the lighting panel to block the illumination light. However, in the organic EL lighting device 1 according to the present embodiment, the ladder code for supporting a plurality of lighting panels and changing their inclinations has a wiring function for supplying power to each lighting panel. Accordingly, the configuration can be simplified as compared with the conventional configuration in which the ladder cord and the wiring cord for applying a voltage to each lighting panel are separately configured. Further, the light emission of the lighting panel is not interrupted by separately providing the wiring cord, and the illuminance of the room where the lighting device is installed can be increased efficiently.

Moreover, according to the structure of this invention, the ladder code 6 exists in the edge part along the major axis direction in the some illumination panel 10, and has a predetermined space | interval along the said major axis direction. A plurality are provided. Therefore, the distance between the ladder cord 6 (wiring) and the electrode of the lighting panel 10 can be configured to be relatively short. If the distance between the ladder cord (wiring) and the electrode of the lighting panel is increased, a voltage drop phenomenon occurs. However, according to the present configuration, such a phenomenon can be avoided by configuring the distance between the ladder cord (wiring) and the electrode of the lighting panel 10 to be relatively short. Therefore, it is possible to realize good illumination without emission spots.

In addition to the above effects, by arranging a plurality of lighting panels on which a plurality of small organic EL elements are mounted, a large-area integrated lighting device can be realized, and the manufacturing cost can be kept low.

In the present embodiment, a configuration in which the ladder cord 6 includes a pair of first cords, a second cord that bridges the two first cords, and the branch wiring 5 will be described. However, the present invention is not limited to this, the second cord is not provided, and the branch wiring 5 is electrically connected to the lighting panel 10 and is also physically connected to the lighting panel 10. It may be configured to support the lighting panel 10.

(Alternative form 1)
In the present embodiment described above, no holes are provided in the lighting panel 10 (the first substrate 17 and the second substrate 18). However, the present invention is not necessarily limited to this, and the lighting panel 10 (the first substrate 17 and the second substrate 18) is provided with a plurality of holes, and the lifting / lowering cord 3 passes through the holes. May be. FIG. 13 is a diagram showing this form.

In this embodiment, as shown in FIG. 13, holes (guide portions) 16 are provided in the vicinity of both ends in the long axis direction of the illumination panel 10 (the first substrate 17 and the second substrate 18). The lifting / lowering cord 3 passes through the hole 16 on one side of each lighting panel 10, and another one lifting / lowering cord 3 passes through the hole 16 on the other side of each lighting panel 10. The lifting / lowering cord 3 only passes through the hole 16, and the lighting panel 10 and the lifting / lowering cord 3 do not fix each other. However, since the respective positional relationships are determined, stable winding is possible.

The air holes 16 are provided to serve as a mechanism for stabilizing the winding without fixing between the lifting / lowering cord 3 and the lighting panel 10. If you do, you will not be caught in the form of holes. Examples of the other guide portions include a groove provided at the end of the lighting panel, a notch, a hook protruding from the end of the lighting panel, and the like.

Here, if it is a hole, a groove, or a notch, the arrangement position is preferably within 10 mm inward from the edge (edge) of the lighting panel 10, and if it is a hook, the lighting panel It is preferable that it is provided within a range of 10 mm or less from the 10 end sides (edges). Thereby, the area of the light emission part of the organic EL element 20 can be taken widely in the illumination panel 10, and it becomes easy to earn required illumination intensity.

Further, when the holes 16 are provided, the holes 16 are provided in the first substrate 17 by using the holes 16 as positioning portions when the first substrate 17 and the second substrate 18 are connected. The positions of the first substrate 17 and the second substrate 18 can be determined so that 16 and the holes 16 provided in the second substrate 18 coincide. Even when grooves, cuts, hooks, or the like are formed, the lighting panel 10 can be formed by arranging the corresponding portions of the upper and lower substrates to coincide with each other.

In FIG. 13, the lighting panel 10 is provided in the vicinity of both ends in the long axis direction. It ’s fine. Accordingly, in addition to the vicinity of the both ends, for example, it may be provided in the center of the lighting panel 10, that is, between the two

organic EL elements

20 and 20, or only one lifting cord 3 is provided. In the case of the configuration in which the lift cord 3 is provided, a hole may be provided only in the central portion, and the lifting cord 3 may be passed through the hole.

(Alternative form 2)
Although the 1st board | substrate 17 and the 2nd board | substrate 18 of the illumination panel 10 provided in this embodiment are set as the structure which can be bent, in addition to this, the curvature rate of the 1st board | substrate 17 and the 2nd board | substrate 18 is adjusted suitably. However, a configuration provided with adjusting means may be used.

FIG. 14 is a diagram for explaining a mode in which adjustment means is provided, and FIG. 14A is a diagram of the illumination panel 10 as viewed from the short side. Note that, based on the configuration of the present embodiment, the lifting / lowering cord 3 should be disposed at the center of each of the three lighting panels 10 shown in FIG. 3 is not shown. FIG. 14 (b) shows only one illumination panel and the configuration in the vicinity thereof, and corresponds to a portion provided with a dashed line in FIG. 14 (a).

In this embodiment, the adjusting means 30 is disposed on one side of the lighting panel 10 along the central axis portion along the longitudinal direction of the lighting panel 10. More specifically, it is arranged between one side of the lighting panel 10 and the ladder cord 6 that crosses the lighting panel 10 in the minor axis direction.

If the length of the adjusting unit 30 along the short axis direction of the lighting panel 10 is one-tenth to one-half the length of the short axis of the lighting panel 10, illumination is performed by a mechanism described later. Since the panel 10 can be curved, it is preferable. If the ratio is less than one tenth, the slats cannot be sufficiently pressurized. If the ratio exceeds one half, only the central portion of the illumination panel 10 cannot be pressurized, so that it is difficult to curve the illumination panel 10. There is a fear.

The adjusting means 30 may be fixed to the ladder cord 6 that crosses the illumination panel 10 along the direction of the short axis. However, the present invention is not limited to this, and may be fixed to one side of the lighting panel 10 or may be fixed to both the ladder cord 6 and one side of the lighting panel 10.

Hereinafter, it is assumed that the illumination panel 10 of the present embodiment is configured to emit light upward when the surface of the illumination panel 10 is leveled as shown in FIG. To do.

14 (a), the ladder cord 6 is bent and the adjusting means 30 does not press the lighting panel 10.

Therefore, when the ladder cord 6 is moved in order to change the surface angle of the lighting panel 10 from the state of FIG. 14A, for example, as shown in FIG. Light can be emitted toward the right side of the drawing and toward the right side of the drawing. In this inclined state, the adjusting means 30 is on the side opposite to the light exit surface side (referred to as the back side) of the lighting panel 10 and receives the tension of the ladder code 6 that is close to the adjusting unit 30, and the back side of the lighting panel 10. The lighting panel 10 is pressurized toward the light exit surface side.

The lighting panel 10 that has been pressed by the adjusting means 30 has a region facing the adjusting means 30, that is, only the central axis portion of the lighting panel 10 protrudes in the pressing direction, and is curved as shown in FIG. It will be in the state. Thereby, the light emitted from the illumination panel 10 becomes diffused light compared to the light emitted from the flat illumination panel 10 shown in FIG.

The diffused light can be used to illuminate the room widely.

The material of the adjusting means 30 is not particularly limited to organic and inorganic materials as long as the lighting panel 10 can be pressurized, but a plastic material is preferable. A known material can be used as the plastic material, and examples thereof include polyethylene and polypropylene.

In the case of using a bottom emission type slat described in a modified example to be described later, since light is emitted from the adjustment unit 30 side in the lighting panel 10, in this case, a material having light transmittance as the adjustment unit 30. Is used. The shape of the adjusting means 30 is not particularly limited as long as it is adhered to the ladder cord 6 that traverses the lighting panel 10 in the minor axis direction.

Thus, by providing the adjusting means 30, the lighting panel 10 having plasticity is curved according to the rotation of the lighting panel 10. That is, the illumination panel shape can be reversibly changed to an arbitrary curvature radius along the minor axis direction. By reversibly changing the illumination panel to the radius of curvature, the light emitted from the organic EL element disposed on the illumination panel can be diffused or condensed.

By providing the adjusting means 30 as described above, when the light emitting surface side of the organic EL lighting device 1 is curved in a convex shape, the light of the organic EL lighting device 1 can be easily diffused, The room or space in which the organic EL lighting device 1 is installed can be illuminated in a wide range. On the other hand, when the light emission surface side of the organic EL lighting device 1 is curved in a concave shape, the light of the organic EL lighting device 1 Can be easily condensed, and it is possible to intensively illuminate a point or a surface that is close to the installation position of the organic EL lighting device 1.

Furthermore, the range of the design of the organic EL lighting device 1 itself is expanded.

(Alternative form 3)
Although this embodiment demonstrated the organic electroluminescent illuminating device, illuminating devices, such as an inorganic electroluminescent illuminating device, plasma illumination, or a field emission lamp (FEL; Field Emission Lamp), may be sufficient, for example. Moreover, although the case where the organic EL lighting device 1 is used as a lighting device has been described in the present embodiment, for example, it may be used as an organic thin film solar cell, an organic transistor (organic FET), or the like. Even in these cases, the wiring function for supplying power to each panel is provided, and the voltage drop phenomenon can be prevented by laying many power supply source wirings at short intervals without increasing extra wiring. Uniform light emission lighting can be provided. In addition, the illuminance of the room where the lighting device is installed can be efficiently increased without blocking the light emitted from the lighting panel.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope indicated in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples as long as the gist thereof is not exceeded.

[Example 1]
An organic EL lighting device employing a strip-shaped RGB laminated white organic EL element having a length of 450 mm and a width of 50 mm was produced.

Specifically, in Example 1, glass substrates having a length of 1000 mm, a width of 70 mm, and a thickness of 0.7 mm were used as the first substrate 17 and the second substrate 18 shown in FIG. Conductive wiring having a thickness of 100 nm was formed on the surface of the first substrate 17 under a water pressure of 6 × 10 ⁻⁴ Pa. Two organic EL elements 20 were arranged on the first substrate 17, and the conductive wiring 9 of the first substrate 17 and the organic EL element 20 were connected. Then, the 1st board | substrate 17 and the 2nd board | substrate 18 were bonded together through resin 19, and the illumination panel 10 was produced.

25 The produced lighting panels were placed on a ladder cord connecting the head box and the bottom rail, and a lifting cord was arranged near the short side of each lighting panel, and then the ladder cord and the lighting panel were connected. Specifically, the conductive wiring of the lighting panel and the branch wiring connected to the ladder cord were connected by lead-free solder. In this way, an organic EL lighting device was obtained. When the lighting panel is tilted so as to be vertical (the organic EL lighting device is fully opened), the two lighting panels arranged vertically overlap each other by 10 mm. Therefore, the height of the obtained organic EL lighting device is 1510 mm (width 60 mm × 25 sheets + endless portion 10 mm). Here, when considering the head box (width 40 mm) and the bottom rail (width 10 mm), the height of the organic EL lighting device is 1550 mm.

When the chromaticity of the obtained organic EL lighting device was measured using a color luminance meter BM-5A manufactured by Topcon Corporation, the chromaticity was (0.33, 0.33). Further, when the color temperature was measured with a spectral radiance meter MCPD-7000 manufactured by Otsuka Electronics Co., Ltd., the color temperature was 5600K daylight white light emission. The emission luminance measured by the luminance meter was 50000 cd / m ² at 17V. Further, the entire luminance ratio including the vicinity of the electrode and the portion farthest from the electrode was within 3% in terms of the peak luminance ratio, and good light emission uniformity was obtained.

[Example 2]
Except that the holes 16 shown in FIG. 13 are bored one by one at 5 mm from the ends of both short sides of the lighting panel 10 and the lifting / lowering cords 3 are passed through the holes 16, respectively. An organic EL lighting device was produced by exactly the same manufacturing method.

This ensures the contact between the winding cord and the panel in winding the lighting panel, and enables stable winding.

The obtained organic EL lighting device was wound up 10,000 times and unwound, and the organic EL lighting panel was stably wound up and down without being entangled with the lifting cord.

Example 3
Exactly the same production as in Example 1, except that the size of each organic EL element was reduced and densely arranged in the lighting panel, and that the ladder cord as well as the lifting / lowering cord had a wiring function. An organic EL lighting device was produced by this method.

When the chromaticity of the obtained organic EL lighting device was measured, the chromaticity was (0.33, 0.33) regardless of the light emitting position such as the vicinity of the electrode or the position farthest from the electrode, and the color temperature was It was daylight white light emission of 5600K. Also, the light emission luminance was almost 50000 cd / m ² at 17 V regardless of the light emission position, the overall peak luminance ratio was 1%, and even better light emission homogeneity was obtained.

Example 4
An organic EL lighting device that employs organic EL elements in which one organic EL element is painted in three colors (red, green, and blue) was produced. Other configurations are the same as those in the first embodiment. Voltage is applied to each conductive wiring so that the lighting rate of each of the red (R), green (G), and blue (B) emission colors of the manufactured organic EL lighting device is 30%, 22%, and 60%. Applied.

In the same manner as in Example 1, the chromaticity and color temperature of the obtained organic EL lighting device were measured. The chromaticity was (0.31, 0.33), and the color temperature was 6800K daylight emission.

Example 5
In the same manner as in Example 3, an organic EL lighting device using organic EL elements in which one organic EL element was applied in three colors was produced. However, in each of the conductive wirings, the lighting rate of each of the red (R), green (G), and blue (B) emission colors of the manufactured organic EL lighting device is 46%, 28%, and 50%. A voltage was applied. Other configurations are the same as those in the first embodiment.

In the same manner as in Example 1, the chromaticity and color temperature of the obtained organic EL lighting device were measured. The chromaticity was (0.40, 0.40), and the color temperature was 3800K bulb light emission.

Example 6
An organic EL lighting device employing three types of organic EL elements, a red light emitting organic EL element, a green light emitting organic EL element, and a blue light emitting organic EL element, was produced. Voltage is applied to each conductive wiring so that the lighting rate of each of the red light emitting organic EL element, the green light emitting organic EL element, and the blue light emitting organic EL element of the manufactured organic EL lighting device is 32%, 20%, and 58%. Applied. Other configurations are the same as those in the first embodiment.

Example 7
In the same manner as in Example 3, an organic EL lighting device using organic EL elements in which one organic EL element was applied in three colors was produced. However, the lighting rate of each of the emission colors of red (R), green (G), and blue (B) of the produced organic EL lighting device was changed over time to an arbitrary value of 0 to 100%. As a result, the organic EL lighting device as a whole was able to emit light whose intensity and color were changed in gradation.

Example 8
In the same manner as in Example 3, an organic EL lighting device using organic EL elements in which one organic EL element was applied in three colors was produced. However, it set so that the lighting rate of each luminescent color of red (R), green (G), and blue (B) of the produced organic electroluminescent illuminating device could be controlled with a remote control device (remote controller). Then, during the lighting of the organic EL lighting device, the lighting rate of each emission color was set to an arbitrary value of 0 to 100% with the remote control device. As a result, it was possible to set the light emission intensity and the light emission color to desired values for the entire organic EL lighting device.

[Comparative Example]
The organic EL lighting device manufactured by the same manufacturing method as in Example 1 is compared with the comparative configuration except that the ladder cord is not provided with a wiring function and wiring is laid only on one side of the short side of the lighting panel. did.

When the chromaticity of the obtained organic EL lighting device of the comparative configuration was measured, the chromaticity was (0.33, 0.33) regardless of the light emitting position such as the vicinity of the electrode or the position farthest from the electrode. The color temperature was 5600K daylight white light emission. However, although the emission luminance was 49000 cd / m ² at 17 V in the vicinity of the electrode, it became darker as the distance from the electrode was increased, the overall peak luminance ratio was 15%, and emission spots were observed.

As shown in each of the above embodiments, the organic EL lighting device moves the lifting / lowering cord from the center of the lighting panel to the vicinity of the panel outer periphery, and the ladder cord is provided with a wiring function, so that extra wiring is provided. It was possible to lay many power supply wirings at short intervals without increasing the voltage, preventing the voltage drop phenomenon. Moreover, the illumination intensity of the room in which the lighting device was installed could be efficiently increased without blocking the light emitted from the lighting panel.

Further, according to the second embodiment, by providing a hole through the lifting / lowering cord that is normally located at the center of the lighting panel only at the end, more stable winding and unwinding can be achieved without impairing the light emitting area. It was. According to Example 3, not only the ladder code but also the lifting / lowering code has a wiring function, and the emission area of the organic EL element can be reduced to further suppress the emission spots. According to Examples 4 to 6, the organic EL lighting device may use one organic EL element that is separately applied to RGB, or may use three types of RGB organic EL elements. In particular, by setting the lighting rate of each emission color to an arbitrary value, a desired emission intensity and emission color can be realized.

According to Example 7, various emission intensity and emission colors can be obtained by changing the lighting rate of each emission color of the organic EL lighting device to an arbitrary value over time. Furthermore, if the lighting rate of each luminescent color can be controlled like Example 8, it can be set as the structure which can select the lighting rate of each luminescent color of an organic electroluminescent illuminating device to arbitrary values at any time. That is, the organic EL lighting device can have a dimming function and a toning function.

In addition, this invention is not limited to each embodiment mentioned above. Those skilled in the art can make various modifications to the present invention within the scope of the claims. That is, a new embodiment can be obtained by combining appropriately changed technical means within the scope of the claims. In other words, the specific embodiments made in the detailed description section of the invention are merely to clarify the technical contents of the present invention, and are limited to such specific examples and are interpreted narrowly. It should be understood that the invention can be practiced with various modifications within the spirit of the invention and within the scope of the following claims.

(Summary of the present invention)
The lighting device according to the present invention is as described above.
A plurality of lighting panels each having a light emitting element provided with an electrode and having a light emitting element that emits light when voltage or current is supplied to the electrode;
In the state where the plurality of illumination panels are held and the plurality of illumination panels are aligned in parallel in the major axis direction, the winding cord extends along the arrangement direction, and is arranged in the arrangement direction. A winding cord configured to be able to adjust the arrangement length of the lighting panel group extending along;
A support cord that varies the surface angle of the lighting panel while supporting the plurality of lighting panels;
A lighting device comprising:
The support cord has conductivity,
The electrode provided on the light emitting element is electrically connected to a conductive portion of the support cord.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
It is connected to the winding cord, and includes a tool for adjusting the length of the arranged lighting panels by moving the winding cord,
By winding or unwinding the winding cord, the instrument can move the plurality of lighting panels so as to overlap each other, and can move the lighting panels away from each other.

According to the above configuration, when a lighting device is not used, a plurality of lighting panels can be stacked and gathered.

The so-called blind type lighting device as in the present invention also has a function as a blind for a light-shielding interior in a normal window treatment. Therefore, by adopting the above configuration, when the blind illumination device is not used, it can be rolled up and folded.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
It is connected to the support cord, and has an instrument for moving the support cord to adjust the inclination of the arranged lighting panels,
It is preferable that the plurality of lighting panels can be tilted together by the device taking up or feeding out the support cord, and can be returned to the horizontal or vertical direction from the tilted state.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
It is preferable that a plurality of the support cords are provided along the arrangement direction, and a plurality of the support cords are provided at a predetermined interval on an end side of the illumination panel along the long axis direction.

In the blind illumination device of Patent Document 1 shown in FIG. 15, the wiring 106 is provided in the vicinity of the short side of the slat 102. As shown in FIG. 15, since the wiring 106 is provided only at one end of the slat 102, the distance between the wiring 106 and the conductive member (electrode) in the slat 102 becomes long and a voltage drop phenomenon occurs. Such a voltage drop phenomenon causes light emission spots. However, according to the above-described configuration of the present invention, the support cords are present at the end portions along the long axis direction of the plurality of lighting panels, and a plurality of the support cords have a predetermined interval along the long axis direction. Is provided. Therefore, since the distance between the support cord (wiring) and the electrode of the lighting panel can be configured to be relatively short, the occurrence of a voltage drop phenomenon as in the conventional case can be avoided. Therefore, it is possible to realize good illumination without emission spots.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The support cord has a branch wiring connected to the electrode of the light emitting element,
The contact point between the support cord and the branch wiring is preferably fixed.

According to the above configuration, the power supply from the support cord to each lighting panel is stabilized by fixing the contact point between the support cord and the branch wiring.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
It is preferable that the winding cord is disposed on the end side in the longitudinal direction of the plurality of strip-shaped lighting panels.

According to the above configuration, for example, in the conventional configuration shown in FIG. 15, the winding string 109 is disposed through the hole provided in the central portion of the slat 102, whereas such a hole is formed. There is no need to provide it. Thereby, the area of the light emitting portion can be increased in terms of structure, and necessary illuminance can be easily obtained.

Furthermore, since there is no need to provide a hole in the center of the panel, the light emitting element manufacturing process (panel manufacturing process) can be simplified.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
Each of the lighting panels is provided with one of a guide portion for a support cord that guides the support cord and a guide portion for a take-up cord that guides the take-up cord. It is preferable.

According to the above configuration, the cord can be connected to a desired position of each lighting panel using the guide portion formed on each lighting panel.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
It is preferable that the guide portion is provided outside a region where the light emitting element is formed in each of the lighting panels.

According to the above configuration, since the guide portion is provided outside the region where the light emitting element is formed, the manufacturing process of the light emitting element is not hindered, and the cord is arranged at the position where the light emission is formed. Therefore, the light emitted from the light emitting element is not disturbed.

Specifically, the guide part is preferably a hole, a groove, a cut, or a hook provided within 10 mm inside or 10 mm outside from the edge of the lighting panel.

According to the above configuration, the cord and each lighting panel can be connected through a hole, a groove, a cut, or a hook formed in each lighting panel.

In addition, according to the above configuration, since the guide portion is formed at a location excluding the central portion of the lighting panel, a large light emitting portion can be provided in the central portion, that is, the guide portion is provided in the central portion. In this case, the area of the light emitting portion is narrowed accordingly. Therefore, brightness and illuminance can be increased.

Further, when the guide portion is for a winding cord, the guide portion is provided within 10 mm from the end of the lighting panel, so that the winding cord and the panel are in contact with each other when the lighting panel is rolled up, and the winding is stably performed. Is possible.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The light emitting element preferably includes a flexible substrate.

According to the above configuration, since the substrate has flexibility, an organic EL element can be manufactured as the light-emitting element by using a roll-to-roll manufacturing method. Thereby, even when an organic EL element is mounted, it is possible to reduce the initial investment for introducing the apparatus, the running cost, and the like.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
Each of the lighting panels is preferably curved along the minor axis direction.

According to the above configuration, it is possible to realize an illuminating device capable of making light emitted from the light emitting element into divergent light (diffused light) or condensing it.

Also, since the lighting device having a curved lighting panel is realized, the range of the lighting device design according to the present invention is widened.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The lighting panel is preferably curved with the light emitting surface side of the light emitting element convex.

According to the above configuration, the light of the lighting device can be easily diffused, and the room or space where the lighting device is installed can be illuminated over a wide area.

However, instead of the above configuration, the illumination device according to the present invention is
The illumination panel may be curved with the light emitting surface side of the light emitting element concave.

According to the above configuration, it is possible to easily collect the light of the lighting device, and it is possible to intensively illuminate a point or a surface that is close to the installation position of the lighting device.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
It is preferable that the lighting panel is bendable along the minor axis direction, and further includes adjusting means for adjusting the curvature rate of the lighting panel.

According to the above configuration, the curvature of the illumination panel can be adjusted as appropriate, so that the curvature of the illumination panel can be set to a desired value. Therefore, when the light emission surface side of the light emitted from the light emitting element is curved in a convex shape, the emitted light can be easily diffused to illuminate a room or space where the integrated illumination device is installed over a wide area. In addition, when the light emitting surface side of the light emitted from the light emitting element is curved in a concave shape, the emitted light can be easily collected, and a point or surface close to the installation position of the integrated lighting device can be concentrated. It can be illuminated.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
It is preferable that the light emitting element is curved with the light emitting surface of the light emitting element convex along the minor axis direction of the lighting panel.

According to the above configuration, the light of the light emitting element can be diffused, and the room or space where the integrated lighting device is installed can be illuminated over a wide area.

Further, according to the above configuration, even if the lighting panel itself is not curved, the above-described effects can be achieved by simply bending the light emitting element.

However, instead of the above configuration, the illumination device according to the present invention is
The light emitting element may be curved along the minor axis direction of the lighting panel with the light emitting surface of the light emitting element being concave.

According to the above configuration, the light of the light emitting element can be easily condensed, and it becomes possible to intensively illuminate a point or a surface that is close to the installation position of the integrated illumination device.

Also, in the case of the above configuration, even if the lighting panel itself is not curved, the above-described effects can be achieved by simply bending the light emitting element.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
It is preferable that the light-emitting element is bendable along the minor axis direction of the lighting panel, and further includes an adjusting unit that adjusts the bending rate of the light-emitting element.

According to the above configuration, since the curvature of the light emitting element can be adjusted as appropriate, the curvature of the light emitting element can be set to a desired value. Therefore, when the light emitting surface side of the light emitted from the light emitting element is curved in a convex shape, the emitted light can be easily diffused to illuminate a room or space where the lighting device is installed over a wide area. In addition, when the light exit surface side of the light emitted from the light emitting element is curved in a concave shape, the exit light can be easily condensed, and the points or surfaces close to the installation position of the illumination device are intensively illuminated. Is possible.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The plurality of lighting panels can be arranged with their longitudinal directions aligned horizontally,
The plurality of lighting panels are configured to move in the vertical direction.

However, instead of the above configuration, the illumination device according to the present invention is
The plurality of lighting panels may be arranged with their longitudinal directions aligned vertically, and in this case, the plurality of lighting panels are configured to move in the horizontal direction. Yes.

According to the above configuration, by winding or unwinding the winding cord with an instrument, the plurality of lighting panels can be moved together in a stacked manner and moved away from the combined state. Can do.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The light-emitting element preferably has a plurality of emission colors and is configured to be driven independently for each emission color.

According to the above configuration, the integrated lighting device can be provided with toning and dimming properties.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The electrodes are an anode and a cathode. Of the anode and the cathode, the electrode located on the side opposite to the light exit surface preferably comprises a light-reflective material.

According to the above configuration, even if the light emitted from the light emitting element is emitted to the non-light emitting surface side, it is reflected by the electrode having light reflectivity and emitted from the light emitting surface side. As a result, utilization efficiency of light emitted from the light emitting element can be increased.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The electrodes are an anode and a cathode, and at least one of the anode and the cathode is preferably a transparent electrode.

According to the above configuration, the light emitted from the light emitting element is emitted from the transparent electrode side, and the light can be efficiently taken out of the element. Further, by making the electrode on the light extraction side a transparent electrode, light can be condensed by a microcavity (microresonator) effect. As a result, an improvement in luminous efficiency and an improvement in color purity can be realized, and light can have directivity and the like.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The lighting panel has a structure in which the light emitting element is disposed between a pair of opposing substrates.
Of the pair of substrates, the substrate located on the side opposite to the light emitting side is made of a light-reflective material or a material having a light-reflective surface.
The gap portion between the pair of substrates is preferably sealed with a light-reflective material or a material having a light-reflective surface.

According to the above configuration, light emitted from a surface other than the light emitting surface of the light emitting element is reflected on the wall surface of the illumination panel (the wall surface of the illumination panel surrounding the organic EL element). Therefore, the light leaking from the light emitting element can be extracted more effectively.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The light emitting element preferably has a resin layer having light diffusibility on the light emitting surface side.

However, instead of the above configuration, the illumination device according to the present invention is
The light emitting element may have a light diffusing plate having light diffusibility on the light emitting surface side.

In the case of an organic EL element which is an example of a light emitting element, generally, emitted light is widely diffused and emitted. For this reason, a microcavity (microresonator) structure is usually employed, and light is resonated and condensed by adjusting the optical path length. As a result, an improvement in luminous efficiency and an improvement in color purity can be realized, and light can have directivity and the like.

According to the above configuration, a light diffusing resin layer is formed on the light emitting surface side or a light diffusing plate is introduced. As a result, the emitted light passes through the light diffusing portion and is uniformly diffused and emitted from the light emitting surface, thereby improving the color purity and luminous efficiency of the illumination device and realizing a wide viewing angle. .

Or the illuminating device which concerns on this invention replaces with said structure,
Of the pair of substrates, the substrate on the light emitting surface side may be made of a light diffusing material.

According to the above configuration, the substrate on the light emitting surface side is made of a light diffusing material. As a result, the emitted light passes through the light diffusing portion and is uniformly diffused and emitted from the light emitting surface, thereby improving the color purity and luminous efficiency of the illumination device and realizing a wide viewing angle. .

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The light emitting element preferably has a wavelength conversion layer on the light exit surface side.

According to the above configuration, the light emitted from the organic EL element can be converted into light having a desired wavelength by using the wavelength conversion layer.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The light-emitting element preferably has a circularly polarizing plate on the light exit surface side.

According to the above configuration, the circularly polarizing plate can circularly polarize the light emitted from the light emitting element and suppress external light reflection.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The light emitting element preferably has a color filter on the light emitting surface side.

According to the above configuration, the color filter can emit only light having a desired wavelength from the light emitted from the light emitting element, and can obtain the effect of suppressing or reducing the reflection of external light.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The light emitting element is an organic EL element having an anode and a cathode as the electrodes,
The organic EL device preferably further has a charge generation layer.

According to the above configuration, the holes propagated from the anode and the electrons propagated from the cathode can be efficiently propagated to the light emitting region. The charge generation region is formed between the organic EL layers, and by forming an equipotential surface between adjacent light emitting regions, the driving current is increased while the flowing current is reduced, and the excellent light emission life Can be obtained.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The light emitting element is an organic EL element having an anode and a cathode as the electrodes,
The cathode is formed by co-evaporating magnesium and silver in a ratio of 1: 9.
The organic EL element preferably has an electron injection layer made of lithium fluoride.

According to the above configuration, electrons injected from the cathode can be efficiently injected into the light emitting region.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The light emitting element is an organic EL element having an anode and a cathode as the electrodes,
The organic EL element has an organic layer including a light emitting region, and the organic layer is preferably composed of a both charge transporting material.

According to said structure, both charge transport materials can propagate the hole inject | poured from the anode, and the electron inject | poured from the cathode to the light emission area | region with (1) high mobility and high balance, In addition, (2) the highest occupied level / lowest empty level (HOMO / LUMO) energy difference is sufficiently large (about 3 eV), and since it is a wide gap material, high luminous efficiency can be obtained.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
The light emitting element is an organic EL element having an anode and a cathode as the electrodes,
The light emitting region is formed by doping the both charge transporting materials with a light emitting dopant,
An electron blocking region formed by the both charge transporting material and the electron blocking material between the anode and the light emitting region;
A hole blocking region formed by the both charge transporting material and hole blocking material between the cathode and the light emitting region;
In addition,
The first condition that the charge transporting material constituting the electron blocking region has a lowest empty orbit higher than the lowest empty orbit of the charge transporting material constituting the light emitting region, and the hole The charge transporting material constituting the blocking region has at least any one of the second conditions that the highest occupied track is shallower than the highest occupied track of the charge transporting material constituting the light emitting region. It is preferable that these conditions are satisfied.

According to the above configuration, the electron blocking region for blocking the movement of electrons and the hole blocking region for blocking the movement of holes are provided across the light emitting region formed by both charge transport materials. For this reason, the holes propagated from the anode and the electrons propagated from the cathode are confined in the light emitting region, so that the probability that holes and electrons recombine in the light emitting region is increased, and the driving voltage of the organic EL element is reduced. Can be lowered.

In addition, since the probability of recombination of holes and electrons in the light emitting region is increased, the internal quantum yield can be improved and the light emission efficiency can be improved. However, it is not always necessary to have both an electron blocking region and a hole blocking region, and the recombination probability of holes and electrons can be sufficiently increased by having only one of them. Therefore, it is possible to provide an organic EL element that realizes high luminance, high efficiency, and long life.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
It is preferable that the winding cord is configured to supply a voltage or current to the electrodes provided in the light emitting element.

According to the above configuration, the take-up cord in addition to the support cord also has a wiring function, thereby securing more power supply sources, thereby stabilizing the power supply. Further, the occurrence of light emission spots due to a decrease in the voltage flowing from each cord is prevented, and more uniform light emission can be obtained.

Moreover, in addition to said structure, the illuminating device which concerns on this invention is
It is preferable that the winding cord has a branch wiring connected to the electrode of the light emitting element, and a branch start point of the branch wiring is fixed.

According to the above configuration, according to the above configuration, the power supply from the cord to each lighting panel is stabilized by fixing the contact point between the winding cord and its branch wiring.

Moreover, the illumination device according to the present invention includes:
The contact point between the support cord and the branch wiring may be movable.

According to the above configuration, according to the above configuration, the contact point between the cord and the branch wiring is movable, so that the lighting panel can be slid when the plurality of lighting panels are stacked together.

Moreover, the manufacturing method of the lighting device according to the present invention is as described above.
A plurality of lighting panels each having a light emitting element provided with an electrode and having a light emitting element that emits light when voltage or current is supplied to the electrode;
In the state where the plurality of lighting panels are held and the plurality of lighting panels are aligned in parallel in the major axis direction, the winding cords extend along the arrangement direction and are arranged. A winding cord configured to be able to adjust the length of the lighting panel;
A support cord that varies the surface angle of the lighting panel while supporting the plurality of lighting panels;
A method of manufacturing a lighting device comprising:
A lighting panel forming step for forming the lighting panel in which the light emitting element is disposed;
A supporting cord having conductivity is prepared so that the supporting cord can supply voltage or current to the electrode provided on the light emitting element, and a conductive portion of the supporting cord and an electrode of the light emitting element are prepared. And a connecting step of electrically connecting the two.

Moreover, the manufacturing method of the illuminating device which concerns on this invention is added to said structure,
The lighting panel forming step includes an organic electroluminescent element forming step of forming, as the light emitting element, an organic electroluminescent element in which at least an anode, an organic layer including a light emitting region, and a cathode are formed in this order on the substrate. And
In the organic electroluminescence element forming step, the organic electroluminescence element is preferably formed by a roll-to-roll method.

According to the above method, an integrated illumination device having a large area can be realized, and the manufacturing cost can be kept low.

Moreover, the manufacturing method of the illuminating device which concerns on this invention is added to said structure,
The lighting panel forming step includes an organic electroluminescent element forming step of forming, as the light emitting element, an organic electroluminescent element in which at least an anode, an organic layer including a light emitting region, and a cathode are formed in this order on the substrate. And
In the organic electroluminescence element forming step, the charge transporting material is doped with a light emitting dopant to form the light emitting region, and the charge transporting material and the electron blocking material are formed between the anode and the light emitting region. An electron blocking region is formed between the cathode and the light emitting region by the charge transporting material and the hole blocking material, and the electron blocking region and the hole blocking region are formed. Of these, at least one of them is preferably formed by vapor deposition polymerization.

According to the above method, a stable electron blocking region and hole blocking region can be formed by a simple method called vapor deposition polymerization.

Moreover, the manufacturing method of the illuminating device which concerns on this invention is added to said structure,
The lighting panel forming step includes an organic electroluminescent element forming step of forming, as the light emitting element, an organic electroluminescent element in which at least an anode, an organic layer including a light emitting region, and a cathode are formed in this order on the substrate. And
In the organic electroluminescence element forming step, it is preferable to perform heat treatment at the same time as or after vapor deposition of at least one material constituting the organic layer under vacuum conditions.

In addition to the above method, the method of manufacturing the lighting device according to the present invention includes:
The lighting panel forming step includes an organic electroluminescent element forming step of forming, as the light emitting element, an organic electroluminescent element in which at least an anode, an organic layer including a light emitting region, and a cathode are formed in this order on the substrate. And
In the organic electroluminescence element forming step, it is preferable to irradiate ultraviolet rays at the same time as or after vapor deposition of at least one material constituting the organic layer under vacuum conditions.

According to the above method, the substrate is heated by heat treatment or ultraviolet irradiation, the reaction is accelerated, (1) vapor deposition polymerization can be completed, and (2) the degree of polymerization can be controlled. Furthermore, the molecular orientation in the deposited film can be controlled by heat treatment.

In addition to the above method, the method of manufacturing the lighting device according to the present invention includes:
In the organic electroluminescence element forming step, it is preferable to perform heat treatment after the irradiation with the ultraviolet rays.

According to the above method, the substrate is heated by ultraviolet irradiation, the reaction is accelerated, (1) vapor deposition polymerization can be completed, and (2) the degree of polymerization can be controlled. Then, the molecular orientation in the deposited film can be controlled by performing the heat treatment thereafter.

In addition to the above method, the method of manufacturing the lighting device according to the present invention includes:
In the organic electroluminescence element forming step, it is preferable to form a pattern using a mask when the ultraviolet rays are irradiated.

According to the above method, when a pattern is formed on the surface of the organic layer, it can be efficiently patterned.

The lighting device according to the present invention can be suitably used as a blind type lighting device, for example, as various lighting devices such as office lighting, store lighting, or facility lighting.

1 Organic EL lighting device (lighting device)
2 Headbox 3 Lifting cord (winding cord)
4 Bottom rail 5 Branch wiring 6 Ladder cord (support cord)
7 Rod (equipment)
8 Connection wiring 9 Conductive wiring 10 Illumination panel 10 ′ Organic EL panel 11 Support substrate 11 ′ Film tape 12 First electrode 13 Organic EL layer 14 Second electrode 15 Protective layer 16 Hole (guide part)
17 First substrate 18 Second substrate 19 Resin 20 Organic EL element (light emitting element)
21 grip 22 roll 23 forming part

Claims

A plurality of lighting panels each having a light emitting element provided with an electrode and having a light emitting element that emits light when voltage or current is supplied to the electrode;
In the state where the plurality of illumination panels are held and the plurality of illumination panels are aligned in parallel in the major axis direction, the winding cord extends along the arrangement direction, and is arranged in the arrangement direction. A winding cord configured to be able to adjust the arrangement length of the lighting panel group extending along;
A support cord that varies the surface angle of the lighting panel while supporting the plurality of lighting panels;
A lighting device comprising:
The support cord has conductivity,
The lighting device, wherein the electrode provided on the light emitting element is electrically connected to a conductive portion of the support cord.
It is connected to the winding cord, and includes a tool for adjusting the length of the arranged lighting panels by moving the winding cord,
The apparatus is configured to move the plurality of lighting panels so as to overlap each other by winding or unwinding the winding cord, and to move the plurality of lighting panels away from each other. The lighting device according to claim 1.
It is connected to the support cord, and has an instrument for moving the support cord to adjust the inclination of the arranged lighting panels,
The apparatus is capable of tilting the plurality of lighting panels together by winding or unwinding the support cord, and returning the tilted state to a horizontal or vertical direction. The lighting device according to 1.
The support cord extends along the arrangement direction, and a plurality of the support cords are provided at a predetermined interval on an end side of the lighting panel along the major axis direction. The lighting device according to any one of the above.
The support cord has a branch wiring connected to the electrode of the light emitting element,
The lighting device according to any one of claims 1 to 4, wherein a contact point between the support cord and the branch wiring is fixed.
The lighting device according to any one of claims 1 to 5, wherein the winding cord is disposed on a longitudinal end side of the plurality of strip-shaped lighting panels.
Each of the lighting panels is provided with one of a guide portion for a support cord that guides the support cord and a guide portion for a take-up cord that guides the take-up cord. The illumination device according to claim 1, wherein the illumination device is a light source.
The lighting device according to claim 7, wherein the guide portion is provided outside a region where the light emitting element is formed in each of the lighting panels.
9. The lighting device according to claim 7, wherein the guide portion is a hole, a groove, a cut, or a hook provided within 10 mm on the inner side or within 10 mm on the outer side from the edge of the lighting panel. .
The lighting device according to any one of claims 1 to 9, wherein the light-emitting element includes a flexible substrate.
The lighting device according to any one of claims 1 to 10, wherein each of the lighting panels is curved along a minor axis direction.
The lighting device according to any one of claims 1 to 11, wherein the lighting panel is curved with a light emitting surface side of the light emitting element convex.
The lighting device according to any one of claims 1 to 11, wherein the lighting panel is curved with a light emitting surface side of the light emitting element being concave.
14. The lighting panel according to claim 1, wherein the lighting panel is configured to be bendable along a minor axis direction, and further includes adjusting means for adjusting the bending rate of the lighting panel. The lighting device according to item 1.
15. The light emitting device according to claim 1, wherein the light emitting element is curved along a minor axis direction of the lighting panel with a light emitting surface of the light emitting element being convex. Lighting equipment.
15. The light-emitting element according to claim 1, wherein the light-emitting element is curved along a minor axis direction of the lighting panel with a light-emitting surface of the light-emitting element being concave. Lighting device.
The light-emitting element can be bent along the minor axis direction of the lighting panel, and further includes an adjusting unit that adjusts a bending rate of the light-emitting element. The lighting device according to item.
The plurality of lighting panels are arranged with their longitudinal directions aligned horizontally,
The lighting device according to any one of claims 1 to 17, wherein the plurality of lighting panels are configured to move in a vertical direction.
The plurality of lighting panels are arranged with their longitudinal directions aligned vertically,
The lighting device according to any one of claims 1 to 17, wherein the plurality of lighting panels are configured to move in a horizontal direction.
21. The light emitting device according to claim 1, wherein the light emitting element has a plurality of light emission colors and can be driven independently for each of the light emission colors. The lighting device according to item.
21. The electrode according to any one of claims 1 to 20, wherein the electrode is an anode and a cathode, and an electrode located on a side opposite to the light emission surface of the anode and the cathode includes a light reflective material. The lighting device according to any one of the above.
21. The lighting device according to claim 1, wherein the electrode is an anode and a cathode, and at least one of the anode and the cathode is a transparent electrode.
The lighting panel has a structure in which the light emitting element is disposed between a pair of opposing substrates.
Of the pair of substrates, the substrate located on the side opposite to the light emitting side is made of a light-reflective material or a material having a light-reflective surface.
23. The illumination according to any one of claims 1 to 22, wherein a gap portion between the pair of substrates is sealed with a light-reflective material or a material having a light-reflective surface. apparatus.
The lighting device according to any one of claims 1 to 23, wherein the light emitting element has a resin layer having light diffusibility on the light emitting surface side.
The lighting device according to any one of claims 1 to 23, wherein the light emitting element has a light diffusing plate having light diffusibility on the light emitting surface side.
24. The illumination device according to claim 23, wherein the substrate on the light emitting surface side of the pair of substrates is made of a light diffusing material.
The lighting device according to any one of claims 1 to 26, wherein the light emitting element has a wavelength conversion layer on a light emitting surface side thereof.
The lighting device according to any one of claims 1 to 27, wherein the light emitting element has a circularly polarizing plate on a light emitting surface side thereof.
The lighting device according to any one of claims 1 to 28, wherein the light emitting element has a color filter on a light emitting surface side thereof.
The light emitting element is an organic electroluminescence element having an anode and a cathode as the electrodes,
30. The lighting device according to any one of claims 1 to 29, wherein the organic electroluminescence element further has a charge generation layer.
The light emitting element is an organic electroluminescence element having an anode and a cathode as the electrodes,
The cathode is formed by co-evaporating magnesium and silver in a ratio of 1: 9.
The said organic electroluminescent element has an electron injection layer which consists of lithium fluoride, The illuminating device of any one of Claim 1-30 characterized by the above-mentioned.
The light emitting element is an organic electroluminescence element having an anode and a cathode as the electrodes,
32. The organic electroluminescence device according to claim 1, wherein the organic electroluminescence device has an organic layer including a light emitting region, and the organic layer is composed of both charge transport materials. The lighting device described in 1.
The light emitting element is an organic electroluminescence element having an anode and a cathode as the electrodes,
The light emitting region is formed by doping the both charge transporting materials with a light emitting dopant,
An electron blocking region formed by the both charge transporting material and the electron blocking material between the anode and the light emitting region;
A hole blocking region formed by the both charge transporting material and hole blocking material between the cathode and the light emitting region;
In addition,
The first condition that the charge transporting material constituting the electron blocking region has a lowest empty orbit higher than the lowest empty orbit of the charge transporting material constituting the light emitting region, and the hole The charge transporting material constituting the blocking region has at least any one of the second conditions that the highest occupied track is shallower than the highest occupied track of the charge transporting material constituting the light emitting region. The lighting device according to claim 32, wherein the above condition is satisfied.
34. The winding cord according to any one of claims 1 to 33, wherein the winding cord is configured to supply a voltage or a current to the electrode provided in the light emitting element. The lighting device described.
The lighting device according to claim 34, wherein the winding cord has a branch wiring connected to the electrode of the light emitting element, and a branch start point of the branch wiring is fixed.
The lighting device according to claim 1 or 2, wherein a contact point between the support cord and the branch wiring is movable.
A light-emitting element provided with an electrode, the light-emitting element that emits light when a voltage or a current is supplied to the power source, and a plurality of lighting panels having a strip shape;
In the state where the plurality of illumination panels are held and the plurality of illumination panels are aligned in parallel in the longitudinal direction, the winding cords extend along the arrangement direction and are arranged A take-up cord configured to be able to adjust the length of the panel;
A support cord that varies the surface angle of the lighting panel while supporting the plurality of lighting panels;
A method of manufacturing a lighting device comprising:
An illumination panel forming step of forming an illumination panel in which the light emitting element is disposed;
A supporting cord having conductivity is prepared so that the supporting cord can supply voltage or current to the electrode provided on the light emitting element, and a conductive portion of the supporting cord and an electrode of the light emitting element are prepared. And a connecting step of electrically connecting the lighting device and the lighting device.
The lighting panel forming step includes an organic electroluminescent element forming step of forming, as the light emitting element, an organic electroluminescent element in which at least an anode, an organic layer including a light emitting region, and a cathode are formed in this order on the substrate. And
38. The method of manufacturing an illumination device according to claim 37, wherein the organic electroluminescence element forming step forms the organic electroluminescence element by a roll-to-roll method.
The lighting panel forming step includes an organic electroluminescent element forming step of forming, as the light emitting element, an organic electroluminescent element in which at least an anode, an organic layer including a light emitting region, and a cathode are formed in this order on the substrate. And
In the organic electroluminescence element forming step, the charge transporting material is doped with a light emitting dopant to form the light emitting region, and the charge transporting material and the electron blocking material are formed between the anode and the light emitting region. An electron blocking region is formed between the cathode and the light emitting region by the charge transporting material and the hole blocking material, and the electron blocking region and the hole blocking region are formed. 39. The method for manufacturing a lighting device according to claim 37 or 38, wherein at least one of them is formed by vapor deposition polymerization.
The lighting panel forming step includes an organic electroluminescent element forming step of forming, as the light emitting element, an organic electroluminescent element in which at least an anode, an organic layer including a light emitting region, and a cathode are formed in this order on the substrate. And
38. In the organic electroluminescence element forming step, heat treatment is performed simultaneously with or after vapor deposition of at least one material constituting the organic layer under vacuum conditions. The manufacturing method of the illuminating device of description.
The lighting panel forming step includes an organic electroluminescent element forming step of forming, as the light emitting element, an organic electroluminescent element in which at least an anode, an organic layer including a light emitting region, and a cathode are formed in this order on the substrate. And
38. In the organic electroluminescence element forming step, at least one kind of material constituting the organic layer is vapor-deposited under vacuum conditions at the same time or after vapor deposition, and then irradiated with ultraviolet rays. The manufacturing method of the illuminating device of description.
42. The method of manufacturing an illuminating device according to claim 41, wherein in the organic electroluminescence element forming step, heat treatment is performed after the ultraviolet ray is irradiated.
42. The method of manufacturing an illuminating device according to claim 41, wherein in the organic electroluminescence element forming step, a pattern is formed using a mask when the ultraviolet ray is irradiated.