JP2015056537A - Organic el lighting panel, lighting fixture, and building material unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic EL lighting panel and the like excellent in design and safety.SOLUTION: An organic EL lighting panel 1 in which a first substrate 11 having optical transparency, a first electrode 12 having optical transparency, an organic layer 13 including a light-emitting layer, a second electrode 14 having light reflectivity, and a second substrate 15 are laminated in this order includes a protective member 20 made of a building material and arranged at a position opposite to that side of the second substrate 15 on which the second electrode 14 is arranged. The protective member 20 has a portion exposed to a light extraction side.

Description

  The present invention relates to an organic EL (Electro Luminescence) lighting panel, a lighting fixture using the same, and a building material unit.

  Application of organic EL panels to various apparatuses as a surface emitting device is being studied. For example, an organic EL lighting panel (an organic EL panel for illumination) using an organic EL panel as a light source for illumination has been proposed. The organic EL panel includes an organic layer light emitting layer sandwiched between electrodes between two opposing substrates.

  In recent years, it has been proposed to use an organic EL panel for various lighting applications. For example, Patent Document 1 discloses a technique of using an organic EL panel for outdoor lighting. Specifically, for the purpose of assuring long-term outdoor use, an outdoor light-emitting building material panel having a structure in which an organic EL panel is laminated on a building material panel is disclosed.

JP 2013-112940 A

  When an organic EL panel is attached to a building as a lighting application, the organic EL panel is attached to a ceiling or an indoor or outdoor wall, for example.

  In this case, there is a problem that the design of the organic EL panel and the building do not match and the design is inferior.

  Moreover, the board | substrate of an organic electroluminescent panel may be damaged by impact etc., and there exists a subject that lacks in safety | security. In particular, when the substrate of the organic EL panel is a glass substrate, the substrate is likely to be chipped or cracked.

  This invention is made | formed in order to solve such a subject, and it aims at providing the organic EL lighting panel, the lighting fixture, and the building material unit excellent in the designability and safety | security.

  In order to solve the above-described problem, an aspect of the organic EL lighting panel according to the present invention includes a first substrate having light transmittance, a first electrode having light transmittance, an organic layer including a light emitting layer, and light. An organic EL lighting panel in which a second electrode having reflectivity and a second substrate are laminated in this order, and disposed at a position opposite to the side on which the second electrode is disposed on the second substrate. And a protective member made of a building material, wherein the protective member has a portion exposed to the light extraction side.

  Moreover, the aspect of the organic EL lighting panel according to the present invention may further include a first light extraction layer provided so as to sandwich the first electrode with the organic layer.

  In the aspect of the organic EL lighting panel according to the present invention, the first light extraction layer may be provided at a position on the opposite side of the first substrate from the side where the first electrode is disposed. .

  In the aspect of the organic EL lighting panel according to the present invention, the first light extraction layer may be provided between the first substrate and the first electrode.

  Moreover, the aspect of the organic EL lighting panel according to the present invention may further include a second light extraction layer provided between the first substrate and the first electrode.

  Further, in one aspect of the organic EL lighting panel according to the present invention, the light distribution of the organic EL lighting panel that is emitted through the first light extraction layer is a region having a luminance higher than the front luminance in a range of a polar angle of 50 ° or more. It may be a light distribution having

  Moreover, the aspect of the organic EL lighting panel according to the present invention may further include a heat dissipation layer made of metal or resin between the second substrate and the protective member.

  In the aspect of the organic EL lighting panel according to the present invention, the first substrate and the second substrate may be laminated with a curvature.

  Further, in one aspect of the organic EL lighting panel according to the present invention, the exposed portion of the protective member with respect to the light extraction side may cover the side surface of the second substrate.

  Moreover, one aspect of the lighting fixture according to the present invention is any one of the above via an air layer on a wall having a decorative surface made of at least one of paper, wood, stone, ceramic, ceramics, and resin. The organic EL lighting panel is a lighting fixture arranged such that the light extraction side faces the wall, and the protective member of the organic EL lighting panel is made of the same material as the decorative surface. .

  Moreover, the one aspect | mode of the lighting fixture which concerns on this invention WHEREIN: The said organic EL lighting panel and the said wall may be connected with the support body.

  In one aspect of the lighting fixture according to the present invention, a wiring for lighting the organic EL lighting panel is drawn out from the organic EL lighting panel, and the wiring is connected to the support body from the organic EL lighting panel. It may be routed through the interior to the back side of the wall.

  Moreover, the aspect of the lighting fixture which concerns on this invention WHEREIN: The reflection member is provided in the said decoration surface so that the said organic EL lighting panel may be opposed, and the said reflection member is in the surface of the said decoration surface. You may arrange | position in the area | region smaller than the area | region which opposes the said protection member.

  Moreover, one aspect of the building material unit according to the present invention includes any one of the above organic EL lighting panels and a building material member made of at least one material selected from paper, wood, stone, ceramic, ceramics, and resin, The organic EL lighting panel is arranged so that a light extraction side faces the building material member, and the protective member in the organic EL lighting panel is made of the same material as the building material member.

  Moreover, the one aspect | mode of the building material unit which concerns on this invention WHEREIN: Furthermore, you may provide the support body which connects the said organic EL lighting panel and the said building material member.

  Moreover, in one aspect of the building material unit according to the present invention, the building material unit further includes a reflecting member provided on the building material member so as to face the organic EL lighting panel, and the reflecting member is included in the plane of the building material member. You may arrange | position in the area | region smaller than the area | region which opposes the said protection member.

  ADVANTAGE OF THE INVENTION According to this invention, the organic electroluminescent illumination panel excellent in the designability and safety | security, a lighting fixture, and a building material unit are realizable.

1 is a perspective view of an organic EL lighting panel according to Embodiment 1 of the present invention. FIG. 6 is a six-sided view of the organic EL lighting panel according to Embodiment 1 of the present invention. It is sectional drawing which shows the structure of the organic electroluminescent illumination panel which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the light distribution in the organic electroluminescent illumination panel which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the structure of the organic electroluminescent illumination panel which concerns on the modification 1 of Embodiment 1 of this invention. It is sectional drawing which shows the structure of the organic electroluminescent illumination panel which concerns on the modification 2 of Embodiment 1 of this invention. It is sectional drawing which shows the structure of the organic electroluminescent illumination panel which concerns on the modification 3 of Embodiment 1 of this invention. It is sectional drawing which shows the structure of the organic electroluminescent illumination panel which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the structure of the lighting fixture which concerns on Embodiment 3 of this invention. It is a perspective view of the lighting fixture which concerns on Embodiment 3 of this invention. It is a figure for demonstrating the mode at the time of light extinction (a) and lighting time (b) in the lighting fixture which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the structure of the building material unit which concerns on Embodiment 4 of this invention. It is sectional drawing which shows the structure of the building material unit which concerns on the modification of Embodiment 4 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Accordingly, the numerical values, shapes, materials, components, arrangement positions and connection forms of components, processes (steps), process orders, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Absent. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment 1)
First, an organic EL lighting panel 1 according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of an organic EL lighting panel according to Embodiment 1 of the present invention. 2A and 2B are six views of the organic EL lighting panel, where FIG. 2A is a front view, FIG. 2B is a top view, FIG. 2C is a left side view, FIG. 2D is a right side view, and FIG. Is a bottom view, and (f) is a rear view. FIG. 3 is a cross-sectional view showing a configuration of the organic EL lighting panel taken along line AA ′ of FIG.

  As shown in FIGS. 1 to 3, the organic EL lighting panel 1 according to the present embodiment includes a first substrate 11 having a light transmission property, a first electrode 12 having a light transmission property, and an organic layer including a light emitting layer. 13, an organic EL panel 10 having a configuration in which a second electrode 14 having light reflectivity and a second substrate 15 are laminated in this order.

  The organic EL lighting panel 1 further includes a protective member 20 made of a building material disposed at a position opposite to the side on which the second electrode 14 is disposed on the second substrate 15. The protection member 20 has an exposed portion 21 that is a portion exposed to the light extraction side of the organic EL lighting panel 1.

  The organic EL lighting panel 1 according to the present embodiment further includes a first light extraction layer 31 provided on the first substrate 11 and a heat dissipation layer 40 provided between the second substrate 15 and the protection member 20. And a pair of first wiring 51 and second wiring 52.

  The organic EL lighting panel 1 in the present embodiment can be used as auxiliary lighting or indirect lighting, for example. In this case, the organic EL lighting panel 1 is installed such that the first light extraction layer 31 faces the installation surface (wall surface or the like) through the air layer. In other words, the organic EL lighting panel 1 is disposed such that the light emitting surface faces the installation surface (for example, faces the wall) and is separated from the installation surface. The organic EL lighting panel 1 can be used for both indoor lighting and outdoor lighting.

  As an example, the total thickness of the organic EL panel 10, the first light extraction layer 31, and the heat dissipation layer 40 is about 4 mm to 5 mm, and the thickness of the protective member 20 is about 5 mm. Moreover, the distance from the installation surface to the protection member 20 can be 20-100 mm, for example.

  Hereinafter, each component of the organic EL lighting panel 1 will be described in detail.

  As shown in FIG. 3, the first substrate 11 is a translucent substrate having a first main surface 11a and a second main surface 11b facing each other. A first light extraction layer 31 is provided on the first major surface 11 a of the first substrate 11. That is, the first main surface 11a is a surface on the light extraction side, and is a surface on the side where the first light extraction layer 31 is disposed. The first electrode 12 is provided on the second main surface 11 b of the first substrate 11. That is, the second main surface 11b is a surface on the side where the first electrode 12 and the organic layer 13 are disposed.

  The first substrate 11 is, for example, a glass substrate made of a glass material, or a resin substrate made of a translucent resin material such as polycarbonate or acrylic. The thickness of the first substrate 11 is, for example, about 0.2 mm to 1.1 mm. In addition, the 1st board | substrate 11 can also use the flexible board | substrate which has flexibility, such as a flexible resin board | substrate and a flexible glass board | substrate, instead of a rigid board | substrate.

  In the present embodiment, a transparent substrate is used as the first substrate 11. More specifically, a rectangular glass substrate having a thickness of 0.7 mm, a vertical length of 100 mm, and a horizontal length of 200 mm is used. Note that the shape of the first substrate 11 is not limited to a square shape or a rectangular shape, but may be a circle, an ellipse, or a polygon other than a rectangle.

  A first extraction electrode 16 and a second extraction electrode 17 are formed at the end of the first substrate 11. The first extraction electrode 16 is electrically connected to the first electrode 12, and the second extraction electrode 17 is electrically connected to the second electrode 14. A first wiring 51 electrically connected to the first extraction electrode 16 is led out from the first extraction electrode 16, and is electrically connected to the second extraction electrode 17 from the second extraction electrode 17. The second wiring 52 thus led out is derived.

  The first electrode 12 is a translucent electrode and is formed on the second main surface 11 b of the first substrate 11. As the first electrode 12, for example, a transparent conductive film made of a transparent conductive material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide) can be used.

  Since the first electrode 12 has translucency, the light emitted from the light emitting layer of the organic layer 13 toward the first substrate 11 passes through the first electrode 12. In the present embodiment, the first electrode 12 is an anode (anode).

  The organic layer 13 is an organic EL layer including at least a light emitting layer (organic light emitting layer), and is provided between the first electrode 12 and the second electrode 14. The organic layer 13 includes functional layers such as a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer in addition to the light emitting layer. However, the organic layer 13 does not need to include all of these functional layers, and may be configured to include a part of these functional layers.

  In the present embodiment, since the first electrode 12 is an anode and the second electrode 14 is a cathode, the organic layer 13 is, for example, a hole injection layer sequentially from the first electrode 12 side toward the second electrode 14. , A hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer. The organic layer 13 is formed on the first electrode 12 by using a predetermined organic material, for example, by a vapor deposition method or a coating method.

  The second electrode 14 is a reflective electrode and is formed on the organic layer 13. As the second electrode 14, for example, a metal film made of a metal such as Ag, Al, or Cu can be used.

  Since the second electrode 14 has reflectivity, the light emitted from the light emitting layer of the organic layer 13 toward the second substrate 15 is reflected by the second electrode 14 and proceeds toward the first substrate 11. In the present embodiment, the first electrode 12 is a cathode.

  As shown in FIG. 3, the second substrate 15 is a cap substrate having a first main surface 15a and a second main surface 15b facing each other, and may be either a translucent substrate or a non-translucent substrate. . A heat dissipation layer 40 is provided on the first main surface 15 a of the second substrate 15. That is, the first main surface 15a is a surface on the side where the heat dissipation layer 40 and the protection member 20 are disposed. The second main surface 15b of the second substrate 15 is a surface on the side where the second electrode 14 and the organic layer 13 are disposed.

  As the second substrate 15, the same material and the same shape substrate as the first substrate 11 can be used. In the present embodiment, the second substrate 15 is smaller in size than the first substrate 11. For example, the second substrate 15 has a thickness of 0.7 mm, a vertical length of 90 mm, and a horizontal length of 190 mm. A rectangular glass substrate (cap glass) is used. Note that the shape of the second substrate 15 is not limited to a square shape or a rectangular shape, and may be a circle, an ellipse, or a polygon other than a rectangle.

  The first substrate 11 and the second substrate 15 are bonded together with a sealing resin (sealing resin layer) 18. Specifically, a sealing resin 18 is formed in a frame shape on the outer periphery of the first substrate 11 so as to surround the first electrode 12, the organic layer 13, and the second electrode 14, and the second main surface 11 b of the first substrate 11 The second substrate 15 is bonded to the first substrate 11 so that the second main surface 11b of the second substrate 15 faces. A solid desiccant may be disposed in the gap between the second electrode 14 and the second substrate 15.

  The protective member 20 is a protective layer provided on the surface of the organic EL panel 10 opposite to the light extraction side. In the present embodiment, as shown in FIG. 3, the protection member 20 is disposed on the first main surface 15 a side of the second substrate 15 and is fixed to the second substrate 15 through the heat dissipation layer 40. . For example, the protection member 20 is bonded to the heat dissipation layer 40 with an adhesive.

  The protection member 20 is a sheet-like protection plate (protection sheet) for protecting the first substrate 11 and the second substrate 15, and is constituted by a building material made of paper, wood, stone, ceramic, ceramics, resin, or the like. Has been. Here, the building material is a building material used for a building, for example, a material used for a wall such as an outer wall or an inner wall, a ceiling, or a floor. As such a protection member 20, a building material panel can be used. In the present embodiment, the material of the protection member 20 is ceramic, and specifically, the protection member 20 is a ceramic tile (ceramic panel) used for wall decoration.

  The surface of the protection member 20 is an external appearance surface of the organic EL lighting panel 1 and is exposed to the air layer (outside air). Therefore, the user can visually recognize the protection member 20 as a building material by configuring the protection member 20 with the building material. In addition, although the whole protection member 20 may be comprised with a building material, as long as the external appearance surface (surface) of the protection member 20 can be recognized as a building material, the whole material of the protection member 20 does not necessarily need to be a building material. That is, the protective member 20 may contain materials other than building materials inside.

  Moreover, the protection member 20 has the exposed part 21 which is a part exposed with respect to the light extraction side of the organic EL lighting panel 1 as described above. The exposed portion 21 is configured to protrude from the outer peripheral edge of the first substrate 11 in a direction parallel to the main surface of the first main surface 11 a of the first substrate 11. That is, the exposed portion 21 protrudes from the first substrate 11. Further, the exposed portion 21 also protrudes from the second substrate 15 and is configured to project from the outer peripheral edge of the second substrate 15 in a direction parallel to the main surface of the first main surface 15a of the second substrate 15. ing.

  In the present embodiment, the protection member 20 has a shape that covers the entire first substrate 11 and the second substrate 15, and the exposed portion 21 exists over the entire circumference of the protection member 20. That is, the size of the protection member 20 is made larger than the sizes of the first substrate 11 and the second substrate 15. In this case, when the protection member 20 is viewed from the direction perpendicular to the main surface, the first substrate 11 and the second substrate 15 are hidden by the protection member 20, and the user cannot visually recognize the first substrate 11 and the second substrate 15. As such a protection member 20, for example, a rectangular building material having a thickness of 5 mm, a vertical length of 120 mm, and a horizontal length of 220 mm can be used. The length of the exposed portion 21 (the amount of protrusion from the second substrate 15) can be set to 5 mm or 10 mm on the entire circumference, for example.

  The exposed portion 21 does not have to be provided on the entire circumference of the protection member 20 and may be provided on a part of the protection member 20. If the length of the exposed portion 21 is too long, the light from the light extraction side is blocked by the exposed portion 21, so the length of the exposed portion 21 (the amount of protrusion from the second substrate 15) is 3 mm or more. 20 mm or less is desirable. When the length of the exposed portion is small, an impact is easily applied to the end surface of the glass substrate, and the function as a protective member is lowered. This is because the glass substrate is most susceptible to cracking at the end face and is brittle. On the other hand, if the length of the exposed portion is long, light emission is blocked by the exposed portion and a sufficient amount of light cannot be obtained. Further, the shape of the protection member 20 is not limited to a square or rectangular rectangle, and may be a circle, an ellipse, or a polygon other than a rectangle.

  The first light extraction layer 31 is an optical member for light extraction provided on the first main surface 11a of the first substrate 11, and when light proceeds from the inside of the organic EL lighting panel 1 to the outside, It is provided to reduce the total reflection of the light at the interface with the air layer (outside air) due to the difference in refractive index. The surface of the first light extraction layer 31 is a light extraction surface of the organic EL lighting panel 1 and is exposed to the air layer (outside air).

  The first light extraction layer 31 is made of a translucent resin material or the like, for example, a microlens array or dot pattern composed of a plurality of convex portions, or a sheet-like optical film or optical sheet having a diffraction grating or a concavo-convex structure, Or it is an optical film which consists of an optical multilayer film from which a refractive index differs. In the present embodiment, the first light extraction layer 31 is a transparent optical film in which a plurality of hemispherical microlenses are arranged in a matrix.

  By providing the first light extraction layer 31 in this manner, the light extraction efficiency of the organic EL lighting panel 1 can be improved. However, the first light extraction layer 31 is not necessarily provided. When the first light extraction layer 31 is not provided, the first substrate 11 is exposed to the air layer (outside air), and the first main surface 11a of the first substrate 11 serves as the light extraction surface of the organic EL lighting panel 1.

  The heat dissipation layer 40 is a heat dissipation member for heat dissipation provided between the second substrate 15 and the protection member 20, and is provided to dissipate heat generated in the organic EL lighting panel 1. The heat dissipation layer 40 is made of a material having high thermal conductivity, and is made of metal or resin. The heat dissipation layer 40 is a heat conductive sheet made of, for example, carbon, and is bonded to the second substrate 15 and the protection member 20 so as to be sandwiched between the second substrate 15 and the protection member 20.

  By providing the heat dissipation layer 40 in this manner, the heat dissipation of the organic EL lighting panel 1 can be improved and deterioration of the organic EL lighting panel 1 due to heat can be suppressed. However, the heat dissipation layer 40 is not necessarily provided. When the heat dissipation layer 40 is not provided, the protection member 20 is bonded to the first main surface 15a of the second substrate 15 with an adhesive or the like.

  The first wiring 51 and the second wiring 52 are conductive lines for supplying power to the organic layer 13 for causing the light emitting layer of the organic layer 13 to emit light. The first wiring 51 and the second wiring 52 are, for example, lead wires.

  One end of the first wiring 51 is connected to the first extraction electrode 16 connected to the first electrode 12. One end of the second wiring 52 is electrically connected to the second lead electrode 17 connected to the second electrode 14. On the other hand, the other end of each of the first wiring 51 and the second wiring 52 is connected to a power supply (power supply circuit) disposed outside the organic EL lighting panel 1.

  In the present embodiment, since the first electrode 12 is an anode and the second electrode 14 is a cathode, the first wiring 51 is a high-voltage side wiring, and the second wiring 52 is a low-voltage side wiring. For example, when a predetermined DC voltage is applied to the first wiring 51 and the second wiring 52, the organic EL lighting panel 1 emits light.

  The organic EL lighting panel 1 configured as described above is a surface light source, and a predetermined voltage is applied between the first electrode 12 and the second electrode 14 via the first wiring 51 and the second wiring 52. Then, holes (holes) and electrons are injected into the organic layer 13 from the first electrode 12 and the second electrode 14, respectively. Then, light is generated by combining holes and electrons in the light emitting layer of the organic layer 13. As shown in FIG. 3, the light generated in the light emitting layer passes through the first electrode 12, the first substrate 11, and the first light extraction layer 31, and is extracted outside the organic EL lighting panel 1 as illumination light.

  Next, the function and effect of the organic EL lighting panel 1 in the present embodiment will be described.

  Since the first substrate 11 and the second substrate 15 in the organic EL lighting panel 1 are thin, when the protective member 20 is not provided, the first substrate 11 and the second substrate 15 are damaged by an impact such as an object colliding. there's a possibility that.

  For example, since a glass substrate has better water resistance than a resin substrate, glass substrates are generally used as the first substrate 11 and the second substrate 15. However, the glass substrate has lower impact resistance than the resin substrate. Easily damaged by impact. In particular, the glass substrate is likely to crack at the end due to impact, and the end is chipped or cracked. For this reason, it is important to protect the end portions of the first substrate 11 and the second substrate 15 first.

  In contrast, in the organic EL lighting panel 1 according to the present embodiment, the protective member 20 is provided on the second substrate 15. Thereby, the impact resistance in the surface and edge part of the 2nd board | substrate 15 can be improved.

  Moreover, the protection member 20 has a portion (exposed portion 21) exposed to the light extraction side. That is, the protective member 20 has a portion that protrudes from the first substrate 11 and the second substrate 15. Thereby, since the edge part of the 1st board | substrate 11 and the 2nd board | substrate 15 becomes a shadow of the exposed part 21, it protects, and it becomes difficult to collide with the edge part of the 1st board | substrate 11 and the 2nd board | substrate 15. Therefore, it can suppress that the 1st board | substrate 11 and the 2nd board | substrate 15 are damaged by an impact. Therefore, the impact resistance at the end portions of the first substrate 11 and the second substrate 15 can be improved.

  In particular, when glass substrates are used as the first substrate 11 and the second substrate 15, the protection member 20 can prevent the glass substrate from being damaged due to impact or the like.

  In the present embodiment, the protective member 20 is larger than the first substrate 11 and the second substrate 15. Thereby, since the perimeter edge part of the 1st board | substrate 11 and the 2nd board | substrate 15 can be protected, the impact resistance of the 1st board | substrate 11 and the 2nd board | substrate 15 can be improved further.

  In addition, when resin substrates are used as the first substrate 11 and the second substrate 15, not only the impact resistance can be improved, but also the ultraviolet resistance can be improved.

  That is, the resin substrate is weak against ultraviolet rays and is more likely to deteriorate than the glass substrate. However, when the first substrate 11 and the second substrate 15 are resin substrates, the first substrate 11 and the second substrate 15 are protected by the protective member 20. Therefore, it is possible to prevent deterioration of the resin substrate due to ultraviolet rays.

  In particular, when the organic EL lighting panel 1 is used outdoors, it is strongly exposed to ultraviolet rays. When the first substrate 11 and the second substrate 15 are resin substrates, there is a concern that the resin substrate may deteriorate over time. According to the organic EL lighting panel 1 in the present embodiment, the protective member 20 can effectively prevent deterioration of the resin substrate due to ultraviolet rays.

  Furthermore, in the organic EL lighting panel 1 according to the present embodiment, the protection member 20 is configured by a building material made of paper, wood, stone, ceramic, ceramics, resin, or the like.

  When the organic EL lighting panel 1 is installed such that the first light extraction layer 31 faces the installation surface (wall surface or the like), the protection member 20 is positioned on the user side, and the user covers the surface of the protection member 20. Although it will visually recognize, the pattern and design of the protection member 20 and an installation surface (wall surface) can be easily match | combined by comprising the protection member 20 with a building material.

  Thereby, it becomes possible to make the exterior surface and installation surface of the organic EL lighting panel 1 harmonize and feel as one design, and the organic EL lighting panel 1 is assimilated to the installation surface to make the organic EL lighting panel 1 stand out. Can be eliminated. Therefore, it is possible to make it difficult for the user to feel the presence of the organic EL lighting panel 1, and therefore it is possible to avoid the design and aesthetics from being inferior without the design of the organic EL lighting panel 1 and the building being matched.

  As described above, according to the organic EL lighting panel 1 according to the present embodiment, the first substrate 11 and the second substrate 15 can be prevented from being damaged by an impact or the like, and the appearance can be matched with the architectural design. An illumination light source with excellent safety and design can be realized.

  Further, as in the present embodiment, the first light extraction layer 31 may be provided so as to sandwich the first electrode 12 with the organic layer 13. That is, the first light extraction layer 31 is preferably provided on the light extraction side of the organic layer 13.

  Thereby, since the light extraction efficiency can be improved, the efficiency can be increased.

  In this case, in the present embodiment, the first light extraction layer 31 is on the opposite side of the first substrate 11 from the side where the first electrode 12 is disposed (that is, the first main surface 11a side of the first substrate 11). It is provided in the position.

  Thereby, since the surface (first main surface 11a) of the first substrate 11 can be protected, the light extraction efficiency can be improved and the mechanical strength can be improved. In particular, when a glass substrate is used as the first substrate 11, scattering of the glass at the time of breakage can be prevented.

  Further, as in the present embodiment, the heat dissipation layer 40 may be provided between the second substrate 15 and the protection member 20.

  Thereby, while being able to improve mechanical strength, heat dissipation can be improved. Therefore, deterioration of the organic layer 13 due to heat can be suppressed.

  In the present embodiment, the light distribution of the organic EL lighting panel 1 emitted through the first light extraction layer 31 is higher than the front luminance in the range where the polar angle θ is 50 ° or more, as shown in FIG. It is preferable that the light distribution has a region of. That is, the light distribution should be such that the luminance in the oblique direction is higher than the luminance in the front direction. In the case of the light distribution shown in FIG. 4, since the region where the polar angle θ is 50 ° or more has higher brightness than the front, the distribution of the total luminous flux of light increases in the region where the polar angle θ is 50 ° or more. .

  The light distribution shown in FIG. 4 can be realized by adjusting the layer configuration of the organic EL panel 10 and the shape of the first light extraction layer 31 (optical film). The front luminance means luminance in the direction perpendicular to the panel surface. The polar angle θ was defined as 0 ° in the front direction and 90 ° in the horizontal direction.

  By setting the light distribution of the organic EL lighting panel 1 to the distribution shown in FIG. 4, the organic EL lighting panel 1 is installed so that the first light extraction layer 31 faces the installation surface (wall surface) through the air layer. In this case, since the luminance in the oblique direction is higher than the luminance in the front direction, the light from the organic EL lighting panel 1 spreads in the oblique direction along the wall 100. As a result, indirect illuminance is easily obtained, and effects of auxiliary illumination and indirect illumination are easily obtained.

  Further, as shown in FIGS. 5A and 5B, the first substrate 11 and the second substrate 15 may be laminated with a curvature. Specifically, the entire first substrate 11 and second substrate 15 can be configured to be curved.

  In this case, as in the organic EL lighting panel 1A shown in FIG. 5A, the first light extraction layer 31 and the organic EL panel 10 are configured to be curved, and the protective member 20 is not curved and the surface remains flat. You may comprise so that it may become.

  Moreover, you may comprise so that all the 1st light extraction layers 31, the organic electroluminescent panel 10, and the protection member 20 may be curved like the organic electroluminescent illumination panel 1B shown by FIG. 5B. In this case, the protective member 20 may be a building material (for example, a paper sheet) that can be easily bent.

  By configuring as shown in FIGS. 5A and 5B, the luminance in the oblique direction can be easily made higher than the luminance in the front direction. Therefore, since the light beam spreading along the wall can be easily increased, the effect of auxiliary illumination can be easily obtained. Moreover, the designability can also be improved. 5A and 5B can also be applied to the following embodiments.

  Further, as in the organic EL lighting panel 1 </ b> C shown in FIG. 6, the exposed portion (exposed portion 21) of the protective member 20 with respect to the light extraction side may cover the side surface of the second substrate 15. .

  Thereby, since an object does not collide with the end surface of the 2nd board | substrate 15, it can prevent more reliably that the end surface of the 2nd board | substrate 15 is damaged. Note that the configuration of FIG. 6 can also be applied to the following embodiments.

  Next, since the organic EL lighting panel 1 according to the present embodiment was produced as an example 1 and an impact resistance experiment was performed, the experiment will be described. First, although the produced organic EL lighting panel 1 is demonstrated, a manufacturing method and material are not limited to this.

  A glass substrate was prepared as the first substrate 11, an ITO film was formed on the first substrate 11 by sputtering, and then patterned by wet etching to form the first electrode 12.

  Next, an organic layer is formed by forming a hole injection layer, a hole transport layer, a light emitting layer (consisting of three layers of RGB), an electron transport layer, and an electron injection layer on the first electrode 12 by vapor deposition. 13 (organic EL layer) was produced.

  Next, a metal film was formed on the organic layer 13 by vapor deposition to form a second electrode 14.

  Next, a seal resin 18 is applied to the periphery of the first substrate 11 so as to surround the organic layer 13, and after a solid desiccant is disposed, a second substrate 15 that is a glass substrate is bonded as an opposing substrate, and ultraviolet light is applied. The first substrate 11 and the second substrate 15 were fixed by curing the sealing resin 18. Thus, the organic EL panel 10 was produced.

  Next, an optical film made of a microlens was laminated as the first light extraction layer 31 on the light extraction side surface of the organic EL panel 10 (the first main surface 11a of the first substrate 11).

  Next, after the heat dissipation layer 40 made of carbon is attached to the back surface of the organic EL panel 10 (the first main surface 15a of the second substrate 15), the protective member 20 made of ceramic tile (ceramic panel) is attached to the heat dissipation layer 40. Pasted together. In addition, as the protection member 20, in order to prevent the glass substrate (the 1st board | substrate 11 and the 2nd board | substrate 15) from being damaged, the thing of a shape 5 mm larger than a glass substrate in the perimeter was used.

  In order to evaluate the impact resistance of the organic EL lighting panel 1 manufactured in this way, the organic EL lighting panel 1 was dropped from a height of 100 cm so that the side surface of the organic EL lighting panel 1 hits the floor. . For comparative evaluation, an organic EL lighting panel in which the protective member 20, the first substrate 11, and the second substrate 15 have the same size (that is, the exposed portion 21 does not exist) is manufactured, and the same drop test is performed. Went.

  As a result, in the organic EL lighting panel in the comparative example, a crack occurred in the end surface of the glass substrate, and cracks occurred in the glass substrate starting from the crack. On the other hand, in the organic EL lighting panel 1 in Example 1, since the substrate end surfaces of the first substrate 11 and the second substrate 15 are protected by the protective member 20, the first substrate 11 and the second substrate 15 directly collide with the floor. No cracks occurred on either the first substrate 11 or the second substrate 15. From the above, it was confirmed that the impact resistance was improved by the presence of the exposed portion 21 in the protective member 20.

  In addition to the microlenses described above, the first light extraction layer 31 has an effect of taking out by changing the direction and intensity of light emission of the light emitting layer, such as a scattering film, a Fresnel lens film, a diffraction grating film, and a lenticular film. A film can be used. For example, by changing the inclination angle of the Fresnel lens film, it is possible to create a region of maximum brightness in a range where the polar angle θ is 50 ° or more.

(Embodiment 2)
Next, the organic EL lighting panel 2 according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 7 is a cross-sectional view showing a configuration of an organic EL lighting panel according to Embodiment 2 of the present invention.

  As shown in FIG. 7, in the organic EL lighting panel 2 in the present embodiment, the second light is further interposed between the first substrate 11 and the first electrode 12 in the organic EL lighting panel 1 in the first embodiment. An extraction layer 32 is provided.

  As shown in FIG. 7, the second light extraction layer 32 is a layer having a fine uneven structure. For example, the second light extraction layer 32 having a minute concavo-convex structure can be formed on the first substrate 11 using a light-transmitting material and using a film formation and patterning process. The second light extraction layer 32 may be the same as the first light extraction layer 31.

  Providing the second light extraction layer 32 in this way can reduce the total reflection of light from the organic layer (light emitting layer) at the interface between the first electrode 12 and the first substrate 11. For this reason, more light can enter the first substrate 11. Therefore, in addition to the effect of improving the light extraction efficiency by the first light extraction layer 31, the light extraction efficiency can be further improved.

  The organic EL lighting panel 2 in the present embodiment can be manufactured in the same manner as the organic EL lighting panel 1 in Example 1. In this case, for example, before forming the first electrode 12 on the first substrate 11, the second light extraction layer 32 is formed using a transparent material, and then the first electrode 12 is formed on the second light extraction layer 32. To do.

  As Example 2, an organic EL lighting panel 2 according to the present embodiment was produced, and light extraction efficiency and impact resistance were evaluated. In the present example, the second light extraction layer 32 was formed so that the uneven size of the uneven structure was 100 nm to 300 nm so as to have scattering performance.

  When the light extraction efficiency of the organic EL lighting panel 2 in this example was measured, it was found that the light extraction efficiency was improved by 1.2 times compared to the organic EL lighting panel 1 in Example 1. Moreover, when impact resistance was evaluated in the same manner as in Example 1, the organic EL lighting panel 2 in the present example had the same result as in Example 1, and it was confirmed that the impact resistance was improved.

  In the present embodiment, the first light extraction layer 31 and the second light extraction layer 32 are provided. However, only the second light extraction layer 32 may be provided without providing the first light extraction layer 31. That is, as the first light extraction layer, a light extraction layer (second light extraction layer 32 in FIG. 7) may be provided only between the first substrate 11 and the first electrode 12. At this time, since the first light extraction layer 31 is not provided, the cost can be reduced.

(Embodiment 3)
Next, a lighting fixture (organic EL lighting fixture) 3 according to Embodiment 3 of the present invention will be described with reference to FIGS. FIG. 8 is a cross-sectional view illustrating a configuration of a lighting fixture according to Embodiment 3 of the present invention, and FIG. 9 is a perspective view of the lighting fixture.

  As shown in FIGS. 8 and 9, the lighting fixture 3 in the present embodiment has a decorative surface made of at least one material of paper, wood, stone, ceramic, ceramics, resin, etc. used as a building material. The organic EL lighting panel 1 according to the above-described embodiment is disposed on the wall 100 having an air layer so that the light extraction side faces the wall 100.

  The lighting fixture 3 configured as described above is a lighting fixture for auxiliary lighting (indirect lighting), and the organic EL lighting panel 1 is installed so that the light emitting surface faces the wall 100 and is separated from the wall 100. . Specifically, the organic EL lighting panel 1 and the wall 100 are connected by a first support body 61 and a second support body 62, and the organic EL lighting panel 1 includes the first support body 61 and the second support body 62. To be fixed to the wall 100. The first support body 61 and the second support body 62 are hollow rod-shaped members made of, for example, metal or resin.

  Furthermore, in the lighting fixture 3, the protective member 20 of the organic EL lighting panel 1 is made of the same material as the decorative surface of the wall 100. In the present embodiment, both the wall 100 and the protection member 20 are made of the same quality ceramic tile.

  Thus, by using the same kind of material for the protective member 20 and the wall 100, the appearance surface of the organic EL lighting panel 1 and the decorative surface of the wall 100 can be made the same.

  Thereby, the external appearance of the lighting fixture 3 resembles the wall 100, and as shown in FIG. 10A, when the lighting fixture 3 is turned off, the lighting fixture 3 appears to be integrated with the wall 100, and the lighting fixture 3 Can be assimilated to the wall 100. Therefore, since the lighting fixture 3 can be made inconspicuous, designability and aesthetics can be improved.

  Moreover, as shown in FIG.10 (b), when the lighting fixture 3 is lighted, it can be felt as if a part of the wall 100 is shining, and an illumination effect with excellent design can be expected.

  Moreover, in this Embodiment, the organic electroluminescent illumination panel 1 in Embodiment 1 is used as a thin surface emitting light source. Thereby, for example, when the distance between the organic EL lighting panel 1 and the wall 100 is 5 mm, the protrusion of the lighting fixture 3 from the wall 100 can be about 10 mm at the maximum. Therefore, the designability can be further improved.

  Moreover, the impact resistance of the first substrate 11 and the second substrate 15 can be improved by using the organic EL lighting panel 1 in the first embodiment. Thereby, the lighting fixture excellent in impact resistance is realizable. Furthermore, when the first substrate 11 and the second substrate 15 are resin substrates, deterioration due to ultraviolet rays can be prevented.

  As mentioned above, according to the lighting fixture 3 which concerns on this Embodiment, it can suppress that the 1st board | substrate 11 and the 2nd board | substrate 15 are damaged by an impact etc., and can be integrated with the wall 100, Therefore Safety It is possible to realize a lighting fixture with excellent design characteristics.

  Furthermore, in the lighting fixture 3 in the present embodiment, each of the first wiring 51 and the second wiring 52 passes through the hollow interior of each of the first support 61 and the second support 62 from the organic EL lighting panel 1. It is routed around the back of 100. That is, the first wiring 51 and the second wiring 52 pass through the first support body 61 and the second support body 62. In addition, the 1st wiring 51 and the 2nd wiring 52 are connected to the power supply arrange | positioned at the back side of the wall 100, for example.

  Thus, by passing the first wiring 51 and the second wiring 52 through the first support 61 and the second support 62, the first wiring 51 and the second wiring 52 can be made inconspicuous. The designability can be further improved.

  In addition, the surfaces of the first support body 61 and the second support body 62 may be metal surfaces or mirror surfaces. Thereby, the light emitted from the organic EL lighting panel 1 can be reflected by the first support body 61 and the second support body 62. That is, the first support body 61 and the second support body 62 can be illuminated by receiving light from the organic EL lighting panel 1. Therefore, the designability can be further improved.

  Also in the present embodiment, the light distribution of the organic EL lighting panel 1 that emits light through the first light extraction layer 31 may be a distribution as shown in FIG.

  Thereby, when the lighting fixture 3 is installed adjacent to the wall 100, the total luminous flux increases in a region where the polar angle is 50 ° or more than the luminance in the front direction, so that the light from the lighting fixture 3 follows the wall 100. Spread diagonally. Therefore, indirect illuminance can be easily obtained, and the effects of auxiliary illumination and indirect illumination can be easily obtained.

  In the present embodiment, the organic EL lighting panel 1 in the first embodiment is used, but the organic EL panel in the first and second modifications of the first embodiment or the second embodiment may be used.

(Embodiment 4)
Next, a building material unit 3A according to Embodiment 4 of the present invention will be described with reference to FIG. FIG. 11: is sectional drawing which shows the structure of the building material unit which concerns on Embodiment 4 of this invention.

  As shown in FIG. 11, the building material unit 3A according to the present embodiment includes at least one of the organic EL lighting panel 1 according to the first embodiment and paper, wood, stone, ceramic, ceramics, resin, and the like used as building materials. And a building material member 70 made of one kind of material.

  The organic EL lighting panel 1 is arranged so that the light extraction side faces the building material member 70. Specifically, the organic EL lighting panel 1 is arranged so that the light emitting surface faces the building material member 70 and is separated from the building material member 70.

  Further, the organic EL lighting panel 1 and the building material member 70 are connected by the first support body 61 and the second support body 62 in the third embodiment, and the organic EL lighting panel 1 includes the first support body 61 and the first support body 61. 2 It is fixed to the building material member 70 by the support body 62.

  Further, the protective member 20 in the organic EL lighting panel 1 is the same material as the building material member 70. Specifically, the surface of the protection member 20 is the same kind of material as the surface of the building material member 70. In the present embodiment, the protective member 20 and the building material member 70 are both made of the same ceramic tile.

  Thus, by making the protective member 20 and the building material member 70 the same kind of material, the appearance surface of the organic EL lighting panel 1 and the appearance surface of the building material member 70 can be made the same. Thereby, the external appearance of the organic EL lighting panel 1 and the building material member 70 is similar, and the organic EL lighting panel 1 and the building material member 70 appear to be integrated. Therefore, since the organic EL lighting panel 1 can be made inconspicuous, a building material unit excellent in design and aesthetics can be realized.

  Moreover, in this Embodiment, the organic electroluminescent illumination panel 1 in Embodiment 1 is used as a thin surface emitting light source. Thereby, the designability can be further improved.

  Moreover, the impact resistance of the first substrate 11 and the second substrate 15 can be improved by using the organic EL lighting panel 1 in the first embodiment. Thereby, the building material unit excellent in impact resistance is realizable. The building material unit 3A can be incorporated as a part of a building structure (wall or the like), for example, when lighting is required for a building structure such as a wall such as a house.

  As described above, according to the building material unit 3 </ b> A according to the present embodiment, a building material unit excellent in impact resistance and design properties can be realized.

  Furthermore, in the building material unit 3 </ b> A in the present embodiment, each of the first wiring 51 and the second wiring 52 passes through the hollow interior of each of the first support body 61 and the second support body 62 from the organic EL lighting panel 1. It is routed behind the member 70.

  Thereby, since the 1st wiring 51 and the 2nd wiring 52 can be made not conspicuous, design nature can be improved further. Further, when the building material unit 3A is incorporated into a wall or the like, it can be easily connected to a power source disposed on the back side of the wall.

  In the present embodiment, similarly to the third embodiment, the surfaces of the first support body 61 and the second support body 62 may be metal surfaces or mirror surfaces. Thereby, since the 1st support body 61 and the 2nd support body 62 can be made to shine at the time of lighting of the organic electroluminescent illumination panel 1, the design property can be improved further.

  Also in the present embodiment, similarly to the third embodiment, the light distribution of the organic EL lighting panel 1 that emits light through the first light extraction layer 31 may be a distribution as shown in FIG. As a result, indirect illuminance is easily obtained, and effects of auxiliary illumination and indirect illumination are easily obtained.

  In the present embodiment, the organic EL lighting panel 1 in the first embodiment is used, but the organic EL panel in the first and second modifications of the first embodiment or the second embodiment may be used.

  In addition, as shown in FIG. 12, a reflecting member 80 may be provided on the building material member 70 so as to face the organic EL lighting panel 1. The reflecting member 80 is a member having a high reflectance that is higher than at least the reflectance of the building material member 70, and is disposed in an area smaller than the area facing the protection member 20 in the surface of the building material member 70. As such a reflective member 80 having a high reflectance, for example, a metal having a reflectance of 90% or more, such as aluminum or a silver compound, or a complete diffuser can be used. Thus, the following effects are acquired by providing the reflecting member 80 in the building material member 70. FIG.

  Since the material of the building material member 70 generally has a low reflectance of 50% to 70%, when the light emitted from the organic EL lighting panel 1 is reflected by the building material member 70, there is a problem that the intensity of the light decreases. .

  Therefore, the reflectance of the light emitted from the organic EL lighting panel 1 can be improved by arranging the reflecting member 80 having a high reflectance at a position where the light emitted from the organic EL lighting panel 1 is reflected. Thereby, the effect that the total luminous flux is improved is obtained.

  Further, the reflecting member 80 is disposed in a region smaller than a region facing the protection member 20 in the surface of the building material member 70. That is, the reflection member 80 is disposed at a position hidden by the protection member 20. Thereby, even if the reflecting member 80 is provided, the reflecting member 80 is not visually recognized in appearance, and the effect that the design property is not impaired is also obtained.

  The reflective member 80 can also be applied to the third embodiment. That is, the reflecting member 80 may be provided on the decorative surface of the wall 100 so as to face the organic EL lighting panel. Also in this case, the reflecting member 80 may be disposed in a region smaller than the region facing the protection member 20 in the decorative surface so as to be hidden by the protection member 20. Thereby, the total luminous flux can be improved without impairing the design.

(Other variations)
As described above, the organic EL lighting panel, the lighting fixture, and the building material unit according to the present invention have been described based on the embodiment and the modification, but the present invention is not limited to the embodiment and the modification.

  For example, in the above-described embodiment and modification, a power source (power supply circuit) for causing the organic EL panel to emit light is not incorporated, but the power source may be incorporated in the organic EL lighting panel, the lighting fixture, and the building material unit. Good.

  In addition, it is realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, and forms obtained by making various modifications conceived by those skilled in the art to each embodiment. Forms are also included in the present invention.

DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C, 2 Organic EL lighting panel 3 Lighting fixture 3A, 3B Building material unit 10 Organic EL panel 11 1st board | substrate 11a, 15a 1st main surface 11b, 15b 2nd main surface 12 1st electrode 13 Organic layer 14 Second electrode 15 Second substrate 16 First extraction electrode 17 Second extraction electrode 18 Seal resin 20 Protection member 21 Exposed portion 31 First light extraction layer 32 Second light extraction layer 40 Heat radiation layer 51 First wiring 52 Second wiring 61 1st support body 62 2nd support body 70 Building material member 80 Reflective member 100 Wall

Claims (16)

An organic layer in which a first substrate having optical transparency, a first electrode having optical transparency, an organic layer including a light emitting layer, a second electrode having optical reflectivity, and a second substrate are laminated in this order. An EL lighting panel,
A protective member made of a building material, disposed at a position opposite to the side on which the second electrode is disposed in the second substrate;
The said protection member is an organic electroluminescent illumination panel which has the part exposed with respect to the light extraction side. The organic EL lighting panel according to claim 1, further comprising a first light extraction layer provided to sandwich the first electrode with the organic layer. The organic EL lighting panel according to claim 2, wherein the first light extraction layer is provided at a position on the opposite side of the first substrate from the side on which the first electrode is disposed. The organic EL lighting panel according to claim 2, wherein the first light extraction layer is provided between the first substrate and the first electrode. The organic EL lighting panel according to claim 3, further comprising a second light extraction layer provided between the first substrate and the first electrode. The light distribution of the organic EL lighting panel that is emitted through the first light extraction layer is a light distribution having a region that is higher in luminance than the front luminance in a polar angle range of 50 ° or more. 2. The organic EL lighting panel according to item 1. The organic EL lighting panel according to claim 1, further comprising a heat dissipation layer made of metal or resin between the second substrate and the protective member. The organic EL lighting panel according to claim 1, wherein the first substrate and the second substrate are stacked with a curvature. The organic EL lighting panel according to any one of claims 1 to 8, wherein a portion exposed to the light extraction side of the protection member covers a side surface of the second substrate. The organic EL illumination according to any one of claims 1 to 9, through an air layer on a wall having a decorative surface made of at least one material selected from paper, wood, stone, ceramic, ceramics, and resin. The panel is a lighting fixture arranged such that the light extraction side faces the wall,
The said protection member of the said organic EL lighting panel is a lighting fixture which is the same kind of material as the said decorative surface. The lighting fixture according to claim 10, wherein the organic EL lighting panel and the wall are connected by a support. Wiring for lighting the organic EL lighting panel is drawn out from the organic EL lighting panel,
The lighting apparatus according to claim 11, wherein the wiring is routed from the organic EL lighting panel to the back side of the wall through the inside of the support. The decorative surface is provided with a reflecting member so as to face the organic EL lighting panel,
The lighting apparatus according to any one of claims 10 to 12, wherein the reflecting member is disposed in a region smaller than a region facing the protection member in a surface of the decorative surface. The organic EL lighting panel according to any one of claims 1 to 9,
A building material member made of at least one material of paper, wood, stone, ceramic, ceramics and resin,
The organic EL lighting panel is arranged so that the light extraction side faces the building material member,
The said protection member in the said organic EL lighting panel is a building material unit which is the same kind of material as the said building material member. Furthermore, the building material unit of Claim 14 provided with the support body which connects the said organic EL lighting panel and the said building material member. Furthermore, a reflective member provided on the building material member so as to face the organic EL lighting panel,
The building material unit according to claim 14 or 15, wherein the reflecting member is disposed in a region smaller than a region facing the protection member in a plane of the building material member.

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