JP2011100709A - Illumination unit and illumination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination unit and an illumination device wherein illuminance can be increased even in the small number of light sources, thinning is enabled, brightness unevenness is less, and a uniform light amount distribution can be obtained against the whole display face. <P>SOLUTION: This illumination unit 1e includes; a first reflecting member 2 having a bottomed and opened reverse truncated pyramid shape; an LED light source 3 installed at the bottom center part of the first reflecting member 2; a second reflecting member 4 which is installed above the LED light source 3 set in opposition to the first reflecting member 2 and in which light emitted from the LED light source 3 is uniformalized and made to be transmitted; and a diffusion member 5a which is mounted and installed at the upper face of the second reflecting member 4 so as to cover the second reflecting member 2 and in which transmitted light of the second reflecting member 4 and reflected light from the first reflecting member 2 are used as a plane light source by being diffused and transmitted. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an illumination unit and an illumination device using the illumination unit.

  Conventionally, a display board using illumination has been used as one of means for transmitting various information. In many of these display boards, a light source is installed on the back side of the display surface (emission surface), and light is emitted from the light source, thereby brightening the display surface and visualizing information. As the light source, a fluorescent lamp, a light emitting diode (LED), or the like is used.

  However, since the fluorescent lamp has a larger amount of heat and consumes more power than the LED, when used as a light source for a display panel, the display surface becomes too hot or the fluorescent lamp must be replaced frequently. There are problems such as. Further, since the luminance increases along the position of the fluorescent lamp, the luminance unevenness is likely to occur, and the display quality may be deteriorated.

  On the other hand, LEDs have high luminous efficiency, low power consumption, and a relatively long life compared with fluorescent lamps, and thus the utility value of the display panel as a lighting device is high. However, since it is necessary to set the distance between the LED and the display faceplate to the shortest distance in order to obtain the optimum illuminance, the degree of freedom in size selection is low and it is difficult to reduce the thickness of the device. Further, since the range in which the emitted light is reflected and reaches is limited, there is a problem that it is not possible to effectively use all of the reflected light as a light source.

  Developed a light source reflection unit designed to reflect the light emitted from the LED light source through a reflector to reflect the light emitted from the light source over a wide area to effectively use the reflected light and increase the illuminance even with a small number of light sources. (For example, refer to Patent Document 1).

  However, since the LED has high directivity, the direct light component from the LED may be emitted to the display surface, resulting in uneven brightness. In particular, when applying LEDs to devices with a relatively wide display surface such as signboards and display devices, it is possible to reduce the thickness with a small number of light sources and to obtain a uniform light amount distribution with optimal illuminance over the entire display surface. It ’s difficult.

JP 2008-216948 A

  In view of the above problems, the present invention can increase the illuminance even with a small number of light sources, can be thinned, and has a uniform luminance distribution with little luminance unevenness over the entire display surface. And a lighting device.

  According to one aspect of the present invention, there is provided a first reflecting member in the shape of an inverted truncated cone with a bottomed opening, an LED light source provided at a bottom center portion of the first reflecting member, and above the LED light source. A second reflecting member that is provided opposite to the first reflecting member and uniformizes and transmits light emitted from the LED light source; and the first reflecting member is disposed above the second reflecting member. The illumination unit includes a diffusing member that covers the opening and diffuses and transmits the transmitted light from the second reflecting member and the reflected light from the first reflecting member to form a surface light source.

  Another feature of the present invention is that a first reflecting member having a total of four reflecting sections of a reverse-headed cone with a bottomed opening in two vertical and horizontal sections, and a bottom center of each reflecting section of the first reflecting member. 4 LED light sources provided in the section, and 4 LED light sources provided above each of the 4 LED light sources so as to face each of the reflecting sections, and uniformly transmit the light emitted from each of the LED light sources. The second reflecting member and the four second reflecting members are provided on the upper surface of the second reflecting member so as to cover the second reflecting member, and the transmitted light and the first reflected light of the second reflecting member are provided. The illumination unit includes four diffusing members that diffuse and transmit reflected light from the member to form a surface light source.

  In addition, another feature of the present invention is that an illumination group in which an appropriate number of the illumination units are arranged vertically and horizontally so as to be arranged in a square shape, an illumination case that houses the illumination group, and an upper opening of the illumination case It is the illuminating device provided with the translucent panel attached to the part.

  In addition, another feature of the present invention is that the first reflecting member in the shape of an inverted truncated cone with a bottomed opening, the LED light source provided at the bottom center of the first reflecting member, and the LED light source A second reflecting member that is provided above the first reflecting member and that uniformly transmits light emitted from the LED light source, and the second reflecting member on the upper surface of the second reflecting member. An illuminating unit that is provided so as to cover the member, and includes a diffusing member that diffuses and transmits the transmitted light of the second reflecting member and the reflected light from the first reflecting member to form a surface light source. is there.

  Another feature of the present invention is that a first reflecting member having a total of four reflecting sections of a reverse-headed cone with a bottomed opening in two vertical and horizontal sections, and each reflecting section of the first reflecting member. Four LED light sources provided in the center of the bottom, and provided above each of the four LED light sources so as to face each of the reflection sections, and uniformly transmit the light emitted from each of the LED light sources. The four second reflecting members, and the four second reflecting members are attached to the upper surfaces of the second reflecting members so as to cover the second reflecting members, and the transmitted light of each of the second reflecting members and the The illumination unit includes four diffusing members that diffusely transmit reflected light from the first reflecting member to form a surface light source.

  In addition, another feature of the present invention is that an illumination group in which an appropriate number of the illumination units are arranged vertically and horizontally so as to be arranged in a square shape, an illumination case that houses the illumination group, and an upper opening of the illumination case It is the illuminating device provided with the translucent panel attached to the part.

  In addition, another feature of the present invention is that a plurality of first inverted reflecting cone-shaped reflecting members having a bottomed opening are arranged vertically and horizontally so as to be arranged in a rectangular shape in an illumination housing, and a plurality of LED light sources are arranged. Each of the plurality of first reflective members is installed at the center of the bottom, a diffusion panel is disposed on the entire top surface of the plurality of first reflective members, and the LED light source on the back surface of the diffusion panel. A plurality of second reflecting members that uniformly transmit light emitted from the respective LED light sources are attached at positions corresponding to the respective upper sides so as to face the first reflecting members, It is the illuminating device which attached the translucent panel to the upper opening part of the said illumination housing | casing.

  Further, another feature of the present invention is that one or more of the first reflecting members having a total of four reflecting sections of the inverted truncated cone with a bottomed opening in two vertical and horizontal sections are formed in a rectangular shape in the lighting housing. The plurality of LED light sources are respectively installed in the center of the bottom of each reflection section of each of the one to a plurality of first reflection members, and the one to a plurality of the first reflections are arranged. A diffusion panel is disposed on the entire upper surface of the member, and is emitted from each LED light source so as to face each of the first reflecting members at a position corresponding to the upper side of each of the LED light sources on the back surface of the diffusion panel. The lighting device includes a plurality of second reflecting members that uniformly transmit light, and each having a translucent panel attached to an upper opening of the lighting housing.

  Furthermore, another feature of the present invention is that an appropriate number of first small reflecting members having a bottomed-opening inverted truncated cone shape and two reflecting sections of the inverted truncated cone having a bottomed opening are arranged vertically and horizontally. An appropriate number of first large reflective members having a total of four sections are arranged vertically and horizontally so as to be arranged in a square shape in the illumination housing, and each of the plurality of LED light sources is arranged in the appropriate number of first small reflective members. A plurality of first small reflection members and a first large reflection member; and a plurality of first small reflection members and a plurality of first large reflection members. A diffusion panel is disposed on the entire top surface, and the first small reflection member and the respective reflection sections of the first large reflection member are respectively positioned above the LED light sources on the back surface of the diffusion panel. A plurality of second reflecting members that uniformize and transmit light emitted from each LED light source so as to face each other And attaching a respectively, on the opening of the illumination housing, a lighting device fitted with a translucent panel.

  According to the present invention, there is provided an illumination unit and an illumination device that can increase the illuminance even with a small number of light sources, can be thinned, and have a uniform luminance distribution with little luminance unevenness over the entire display surface. Can be provided.

Sectional drawing of the illumination unit of the 1st Embodiment of this invention. It is the top view of the illumination unit of the 1st Embodiment of this invention, and the top view which fractured | ruptured and showed the unit side diffusion member. The top view of the 2nd reflection member in the illumination unit of the 1st Embodiment of this invention. The side view of the 2nd reflection member in the illumination unit of the 1st Embodiment of this invention. Sectional drawing of the illuminating device comprised using the illumination unit of the 1st Embodiment of this invention. It is a front view of the illuminating device comprised using the illumination unit of the 1st Embodiment of this invention, and is the top view which fractured | ruptured and showed a part of the unit side diffusion member and the housing | casing side translucent panel. In the illuminating device comprised using the illumination unit of the 1st Embodiment of this invention, the irradiation image figure at the time of making a light source light-emit when the width | variety of the slit of a 2nd reflection member is set constant. The image figure seen from the upper surface of an acrylic board at the time of putting an acrylic board as a housing | casing side translucent panel above the 2nd reflective member of FIG. 6A, and light-emitting a light source in the state which does not use a unit side diffusion member. In the illuminating device comprised using the illumination unit of the 1st Embodiment of this invention, the image figure at the time of making a light source light-emit in the state which has arrange | positioned the unit side diffusion member between the 2nd reflective member and an acrylic board. . Explanatory drawing which shows the example of the reflected light in the illuminating device comprised using the illumination unit of the 1st Embodiment of this invention. The schematic plan view of the illuminating device of the 2nd Embodiment of this invention. Sectional drawing of the illuminating device of the 2nd Embodiment of this invention. Sectional drawing of the illuminating device comprised using the illumination unit of the 3rd Embodiment of this invention. It is a top view of the illuminating device comprised using the illumination unit of the 3rd Embodiment of this invention, Comprising: The top view which fractured | ruptured and showed a part of unit side diffusion member and housing | casing side translucent panel. It is a top view of the 4 division type lighting unit of the 4th Embodiment of this invention, and is the top view which fractured | ruptured and showed a part of unit side diffusion member. Sectional drawing of the 4 division type illumination unit of the 4th Embodiment of this invention. It is a perspective view of the 4 light source type illuminating device comprised using the 4 division type illumination unit of the 4th Embodiment of this invention, Comprising: Part of the unit side diffusion member and the housing | casing side translucent panel are fractured | ruptured. FIG. The top view of the 1 division type illumination unit of the 4th Embodiment of this invention. The top view of the 4 division type lighting unit of the 4th Embodiment of this invention. The top view of an example of the illuminating device of the 5th Embodiment of this invention. The top view of the other example of the illuminating device of the 5th Embodiment of this invention. Sectional drawing of the lighting unit of the 6th Embodiment of this invention. It is the top view of the illumination unit of the 6th Embodiment of this invention, Comprising: The top view which fractured | ruptured and showed a part of unit side diffusion member. The top view of the 2nd reflective member in the illumination unit of the 6th Embodiment of this invention. The side view of the 2nd reflective member in the illumination unit of the 6th Embodiment of this invention. It is a perspective view of the 4 light source type illuminating device of the 7th Embodiment of this invention, Comprising: The perspective view which fractured | ruptured and showed part of the unit side diffusion member and the housing | casing side translucent panel. It is a perspective view of the 4 light source type illuminating device comprised using the 4 division type illumination unit of the 8th Embodiment of this invention, Comprising: The state which opened the unit side diffusion panel and the housing | casing side diffusion light transmission panel Perspective view. The top view of the 1st reflection member of the 1 division type lighting unit of the 8th Embodiment of this invention. The top view of the 1st reflection member of the 4 division type lighting unit of the 8th Embodiment of this invention. The top view of the state which removed the unit side diffusion panel and housing | casing side diffusion light transmissive panel of an example of the illuminating device of the 9th Embodiment of this invention. The back view of the unit side diffusion panel of an example of the illuminating device of the 9th Embodiment of this invention. The top view of the state which removed the unit side diffusion panel and housing | casing side diffusion light transmissive panel of another example of the illuminating device of the 9th Embodiment of this invention. The back view of the unit side diffusion panel of another example of the illuminating device of the 9th Embodiment of this invention. It is a perspective view of the 4 light source type illuminating device comprised using the 4 division type illumination unit of the 10th Embodiment of this invention, Comprising: The state which opened the unit side diffusion panel and the housing | casing side diffusion light transmission panel Perspective view. The top view of the 1st reflection member of the 1 division type lighting unit of the 10th Embodiment of this invention. The top view of the 1st reflective member of the 4 division type lighting unit of the 10th Embodiment of this invention. The top view of the state which removed the unit side diffusion panel and housing | casing side diffusion light transmissive panel of an example of the illuminating device of the 11th Embodiment of this invention. The top view of the state which removed the unit side diffusion panel and housing | casing side diffusion light transmissive panel of another example of the illuminating device of the 11th Embodiment of this invention. The bottom view of the 1st reflection member in the four division type lighting unit of the 12th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

(First embodiment)
1 and 2 show an illumination unit 1a according to a first embodiment of the present invention, and FIGS. 4 and 5 show an illumination device 10a configured by using one illumination unit 1a. As shown in FIGS. 1 and 2, the illumination unit 1 a according to the present embodiment includes a first reflecting member 2 having a bottomed opening and having a reverse headed cone shape, and a bottom central portion of the first reflecting member 2. A light source (LED light source) 3 provided, a second reflecting member 4 provided above the light source 3 and transmitting the light emitted from the light source 3 in a uniform manner, and a second reflecting member 4 on the upper surface of the second reflecting member 4 And a diffusing member 5 that is provided so as to cover the two reflecting members 4 and diffuses and transmits the light transmitted through the second reflecting member 4.

  The first reflecting member 2 has a rectangular bottom surface 2a and an inclined portion 2b that gradually inclines upward (from the light emission direction) toward the outside from the end of the bottom surface 2a. An opening 2d is provided at the center of the bottom surface 2a. The first reflecting member 2 has a square shape when viewed from above, and a length L5 of one side is about 145 mm (see FIG. 5). The bottom surface 2a has a square shape, and the length L6 of one side is about 85 mm (see FIG. 5).

  The light source 3 is exposed from the opening 2 d of the first reflecting member 2. As the light source 3, the LED light source which irradiates white light suitable for an illumination use is preferable. As an LED light source for irradiating white light, for example, a box-type LED package in which an LED chip that outputs blue light and a fluorescent light-emitting part containing a yellow phosphor such as yttrium, aluminum, and garnet (YAG) can be used. It is.

  As shown in FIG. 3A and FIG. 3B, the second reflecting member 4 is arranged in a rectangular first area 41 covering the area immediately above the light source 3 and radially (feathered) around the periphery of the first area 41. A second region 42 and legs 44 for supporting the first region 41 and the second region 42 are provided. In the second region 42, radial slits 43 are formed. The base 44a of the leg portion 44 is fixed to the first reflecting member 2, and the first region 41 and the second region 42 are supported by the inclined column portion 44b.

  As shown in FIGS. 4 and 5, the illumination device 10a of the present embodiment accommodates the illumination unit 1a shown in FIGS. 1 and 2 in a housing 7 having an upper surface opening surrounding the periphery and the bottom surface. The light transmissive diffusion panel 6 is attached to the upper surface opening of the housing 7.

  Usually, the light source 3 of the LED package is bright in the central portion because of its strong directivity. When the width of the slit 43 of the second reflecting member 4 is set to be substantially constant and the light source 3 emits light, the light emitted from the light source 3 is between the first reflecting member 2 and the second reflecting member 4. There are light that is reflected or transmitted and light that is reflected by the back surface of the second reflecting member 4. The light reflected from the back surface of the second reflecting member 4 passes through the slit 43 and exits upward while being reflected several times between the first reflecting member 2 and the second reflecting member 4. .

  Even when the diffusing member 5 is not installed above the second reflecting member 4 and is accommodated in the illumination casing 7 and diffused only by the translucent diffusion panel 6 on the casing side, the second reflecting member 4 By the first region 41, direct irradiation of the direct light emitted from the light source 3 onto the light transmissive diffusion panel 6 is suppressed. In addition, when the width | variety of the slit 43 of the 2nd reflection member 4 is set equally, the intensity | strength of the light which permeate | transmits from the center part in which the light source 3 is arrange | positioned is strong, and the intensity | strength of the light permeate | transmitted from a peripheral part is weak. For this reason, light having a strong light intensity at the central portion of the first region 41 is projected on the casing-side translucent panel 6 and a shadow similar to the second reflecting member 4 is projected onto the translucent diffusion panel 6. Will be. However, even when the width of the slit 43 is the same by disposing the diffusing member 5 above the second reflecting member 4 on the lighting unit 1a side as in the present embodiment, as the lighting device 10a, Surface emission with uniform light quantity can be realized.

  In order to make the amount of light in the plane of the second reflecting member 4 more uniform and efficiently project the transmitted diffused light onto the surface of the casing-side light transmissive diffuser panel 6, the width of the slit 43 is set to a high light intensity. It is preferable to reduce (squeeze) at the center. And it is preferable to set the light transmission area in the peripheral part to be large by increasing the width of the slit 43 as it goes to the peripheral part of the second reflecting member 4 where the light intensity becomes weak.

  For this reason, as shown in FIG. 3A, the width of the slit 43 is set so that the width gradually increases from the center portion of the second reflecting member 4 toward the peripheral portion. Also, the slit width L2 shown in FIG. 3A is set larger than the slit width L3. For example, when the side length L5 of the first reflecting member 2 shown in FIG. 5 is about 145 mm and the side length L6 of the bottom surface 2a is about 85 mm, the square first region 41 in the center shown in FIG. 3A. The side length L1 can be about 10 mm, the slit length L2 can be about 4.5 mm, the slit length L3 can be about 4.66 mm, and the side length L4 of the square second region 42 can be about 60 mm. .

  As shown in FIGS. 1 and 4, the first region 41 of the second reflecting member 4 is disposed at a height h <b> 1 from the bottom surface 2 a of the first reflecting member 2. The outer end portion of the second region 42 is disposed at a height h1 + h2 from the bottom surface 2a. The outer end portion of the second region 42 and the unit side diffusing member 5 are spaced apart by a height h3. As shown in FIG. 4, when the height h (= h1 + h2 + h3) of the illumination unit 1a is about 30 mm, the height h1 is about 19 mm, the height h2 is about 3 mm, and the height h3 is about 8 mm.

  The lengths L1 to L6 and the heights h1 to h3 can be changed according to the characteristics of the light source 3, required illuminance, and the like. The above size is an example in the case of using a 3V, 350 mA, 1.05 W LED package as the light source 3, for example.

  As the first reflecting member 2, a thermoplastic resin having light reflectivity with a light reflectivity of 97% or more is preferably used. Examples of the “thermoplastic resin” include polyolefin resins such as polyethylene resins and polypropylene resins, polyester resins, acrylic resins such as polymethyl acrylate, polyvinyl chloride resins, polyvinylidene chloride resins, fluorine Type resins, polyether resins, polyamide resins, polyurethane resins, diene resins such as polybutadiene, and the like. Among these, it is preferable to use a polyolefin resin from the viewpoint of thermoformability and the like. The light reflectance of the thermoplastic resin is imparted by incorporating an inorganic filler such as titanium oxide, titanium dioxide, or calcium carbonate into the thermoplastic resin. The surface of the first reflecting member 2 may have irregularities.

  The light reflectance of the thermoplastic resin used for the first reflecting member 2 is preferably 97% or more, and more preferably 98% or more. As such a thermoplastic resin material, for example, “Refterra (registered trademark)” manufactured by Sekisui Plastics Co., Ltd. can be adopted. This thermoplastic resin material measures the light reflectance at a wavelength of 550 nm when total reflection light measurement is performed in accordance with JIS K7145, and the light reflectance when a barium sulfate plate is used as a standard reflection plate is 100. It is a material that realizes a light reflectance of 97% or more when it is applied.

  As the material of the second reflecting member 4, a thermoplastic resin having a light reflectivity with a light reflectivity of 97% or more is preferably used, like the material of the first reflecting member 2. By using a thermoplastic resin having a light reflectivity of 97% or more, the attenuation of reflected light can be suppressed compared to the case of using a conventional material having a metal such as silver or aluminum deposited on the surface. The emitted light from the light source 3 can be emitted to the display surface more efficiently. The front and back surfaces of the second reflecting member 4 may have irregularities.

  The unit side diffusing member 5 is composed of a thermoplastic resin sheet having fine holes and flexibility (softness), and a material having a light reflectance of 97% or more is preferable. As the “thermoplastic resin sheet”, for example, a light reflecting member including a polypropylene-based resin laminated foam layer is preferably used. For example, “Lefterra (registered trademark)” manufactured by Sekisui Plastics Co., Ltd. can be used. . This thermoplastic resin laminated sheet has an uneven surface with a surface roughness Ra of about 0.4 to 5.0 μm formed on the surface by bubbles of the foam layer.

  The light reflectance of the thermoplastic resin laminated sheet used for the unit-side diffusion member 5 is preferably 97% or more, and more preferably 99% or more. The thickness of the unit side diffusion member 5 is preferably about 0.01 to 0.15 mm. As the material of the unit side diffusing member 5, by using a thermoplastic resin laminate having an uneven surface with a light reflectance of 97% or more, the uneven surface diffuses and reflects light incident on the unit side diffusing member 5. Can be diffused more uniformly. Thereby, luminance unevenness can be prevented, and uniform light can be emitted onto the emission surface of the plate-shaped housing-side translucent panel 6. Moreover, handling becomes easy by using a thermoplastic resin sheet having fine holes and flexibility.

  As the casing-side translucent panel 6, a translucent material such as a glass plate, a polycarbonate plate, or an acrylic plate that can also be used as a display surface of a signboard is suitably used. Further, the same material as that of the first reflecting member 2 or the second reflecting member 4 may be used.

  As shown in FIG. 4, the housing side translucent panel 6 is arranged to be separated from the unit side diffusion member 5 by a distance d. This distance d varies depending on the required illuminance, LED characteristics, etc., for example, when a 3 mm acrylic plate is used as the casing-side translucent panel 6 and the plate surface illuminance requires 3000 lux or more, The distance d is preferably about 10 mm apart. More preferably, it is about 10-20 mm. Thereby, as an illuminating device 10a as shown in FIGS. 4 and 5 configured using the illuminating unit 1a shown in FIGS. 1 and 2, it is uniform over the entire surface of the plate surface of the casing-side translucent panel 6. An illumination device that illuminates with a distribution of light is obtained.

  FIG. 6A shows an irradiation image diagram when the light source 3 emits light when the width of the slit 43 of the second reflecting member 4 is set to be substantially constant. Usually, the light source 3 of the LED package has a strong directivity, so the central portion is bright. The light emitted from the light source 3 includes light that is reflected or transmitted between the first reflecting member 2 and the second reflecting member 4 and light that is reflected on the back surface of the second reflecting member 4. The light reflected from the back surface of the second reflecting member 4 is transmitted from the slit 43 while being reflected several times between the first reflecting member 2 and the second reflecting member 4.

  FIG. 6B is an image view seen from the upper surface of the acrylic plate when the acrylic plate is placed as the casing-side light transmitting panel 6 above the second reflecting member 4 of FIG. 6A. Direct irradiation of the direct light emitted from the light source 3 onto the acrylic plate is suppressed by the first region 41 of the second reflecting member 4. In addition, when the width | variety of the slit 43 of the 2nd reflection member 4 is set equally, the intensity | strength of the light which permeate | transmits from the center part in which the light source 3 is arrange | positioned is strong, and the intensity | strength of the light permeate | transmitted from a peripheral part is weak. Therefore, it can be seen that light having a strong light intensity in the central portion of the first region 41 is projected on the acrylic plate, and a shadow 8 similar to the second reflecting member 4 is projected onto the acrylic plate. .

  FIG. 6C is an image diagram when a unit-side diffusing member 5 described later is disposed between the second reflecting member 4 and the acrylic plate. Even when the widths of the slits 43 of the second reflecting member 4 are the same, the diffusion member 5 is disposed, and the acrylic plate is separated from the diffusion member 5 by a certain distance or more, so that the surface emission with a uniform light amount can be obtained. It can be seen that it will be realized.

  FIG. 7 is a conceptual diagram illustrating an example of how light emitted from the light source 3 is reflected and transmitted. The light emitted from the light source 3 also causes diffuse reflection and the like on the surfaces of the first reflecting member 2 and the second reflecting member 4, but a part of the illustration is omitted. For example, the light I1 emitted from the light source 3 is reflected on the back surface of the second reflecting member 4 (one time reflection), then reflected on the surface of the first reflecting member 2 (two times reflection), and then the second reflection member 4 again. 2 is incident on the back side of the reflecting member 4. At this time, if there is a slit 43 (not shown) on the incident surface of the second reflecting member 4, the light is transmitted as it is to the diffusing member 5 side. On the other hand, there is also light I2 that is directly incident on the inclined portion 2b of the first reflecting member 2 from the light source 3, and this light I2 is reflected by the inclined portion 2b, and the reflected light is reflected only once to the diffusing member 5. Incident. The light incident on the diffusing member 5 is diffusely reflected by the uneven surface. At the same time, the light that has entered the diffusing member 5 without being diffusely reflected by the uneven surface is greatly refracted and diffusely reflected at the interface between the thermoplastic resin having bubbles and the air in the bubbles, and the housing side translucent panel 6 side. The surface light emission is realized by the casing side translucent panel 6.

  Thus, according to the illumination unit 1a of the present embodiment, the light emitted from the light source 3 is reflected over a wide range by the first reflecting member 2 formed of a thermoplastic resin having a light reflectance of 97% or more. Therefore, the illuminance can be increased even with a small number of light sources. Further, the second reflecting member 4 formed of a thermoplastic resin having a light reflectivity of 97% or more is disposed above the light source 3 so as to face the light source 3, thereby reducing the amount of light from the light source 3 to the second light source 3. It can be made uniform in the plane of the reflecting member 4 and transmitted to the unit side diffusing member 5 side. Further, by using the unit-side diffusion member 5 that is formed of a thermoplastic resin sheet having fine holes and having flexibility (flexibility), the light transmitted from the second reflecting member 4 and the first reflection are reflected. The light reflected from the surface of the member 2 can be efficiently diffused and reflected and transmitted to the housing-side translucent panel 6, and there can be realized an illumination unit in which the luminance unevenness is small and the light amount is uniformly distributed over the entire display surface.

(Second Embodiment)
The illumination device 100a according to the second embodiment of the present invention will be described with reference to FIGS. The lighting device 100a of the present embodiment has a four-round illumination group in which the lighting units 1a of the first embodiment of the present invention described with reference to FIGS. 1 to 3 are arranged in a 6 × 12 matrix. It is the structure accommodated in the housing | casing 17a of upper surface opening so that a bottom surface may be surrounded.

  A power supply 12 connected to an illumination group composed of a large number of illumination units 1a, and a translucent casing side transparency disposed at the upper surface opening of the casing 17a so as to cover the entire light output surface of the illumination group. An optical panel 16a is provided. In this case side translucent panel 16a, instead of the case side translucent panel 6 shown in FIGS. 4 and 5, a single large-area panel is installed on the entire surface of the lighting device 100a.

  Inside the housing 17a, a base 11 for housing wiring connected to the light source 3, a power source 12, and the like is provided. On the base 11, a plurality of lighting units 1 a are fixed via a fixture (not shown) or the like. The wiring of the light source 3 is connected by a connector 13 in the base 11. As the casing-side translucent panel 16a, a light transmissive member such as a glass plate, a polycarbonate plate, an acrylic plate or the like that can be used as a display surface of a signboard is used.

  In addition, the illuminating device 100a shown in FIG.8 and FIG.9 arrange | positions the illumination unit 1a in matrix form, and uses it as a 75.6W (= 6 * 12 * 1.05W) 1800mm * 900mm internal illumination light source signboard. Although an example is shown, the present invention can be applied to lighting devices of various sizes and shapes by adjusting the number of lighting units 1a arranged vertically and horizontally.

  The distance d between the unit side diffusing member 5 and the housing side translucent panel 16a is preferably separated by about 10 to 20 mm when illuminance of, for example, 3000 lux or more is required. Thereby, thickness reduction can be realized and uniform light can be irradiated to the entire display surface.

  According to the illuminating device 100a of the second embodiment, the illuminance can be increased even with a small number of light sources by transmitting the surface-emitting light from the unit-side diffusing member 5 to the housing-side translucent panel 16a. Thus, it is possible to provide an illumination device that can obtain a uniform light amount distribution over the entire display surface with little luminance unevenness.

(Third embodiment)
The illumination unit 1b and the illumination device 10b according to the third embodiment of the present invention will be described with reference to FIGS. The illumination unit 1b according to the present embodiment has the first embodiment shown in FIGS. 1 and 2 in that the inclined portion 2b of the first reflecting member 2 has a convex curved surface shape (a saddle shape). It differs from the lighting unit 1a of the form. In addition, the shape of the 1st reflection member 2 is shape | molded by batch press processing using a metal mold | die etc., for example with a sheet-like thermoplastic resin. The second reflecting member 4 is substantially the same as in the first embodiment. The same applies to the unit-side diffusion member 5 and the housing-side translucent panel 6.

  As described above, according to the illumination unit 1b and the illumination device 10b of the present embodiment, the inclined portion 2b of the first reflecting member 2 has a curved surface shape (a part of a bowl shape). Light can also be reflected and scattered in the four corner directions of the housing 7 of the lighting device 10b that is far away. For this reason, it is possible to realize an illumination unit and an illumination device that can increase the illuminance in the housing 7 and reduce the luminance unevenness and obtain the illuminance with a uniform light amount distribution over the entire display surface.

  As for the lighting unit 1b of the third embodiment, as shown in FIGS. 8 and 9, a large number of bodies are arranged in a matrix like the lighting unit 1a of the first embodiment, and the four rounds and bottom surface The lighting device 100a having the same configuration as that of the second embodiment can be configured by placing the electrical system such as the power supply 13 in the housing 17a so as to surround the projector.

(Fourth embodiment)
The illumination unit 1c according to the fourth embodiment of the present invention will be described with reference to FIGS. 12A and 12B. In the illumination unit 1c of the present embodiment, the first reflecting member 2 has a convex curved surface shape (a saddle shape) from each of its four sides with respect to the bottom surface 2a, and from the top surface on which the inclined portion 2b is formed. A small square section is formed at the same time in four vertical and horizontal sections, and the entire edge is vertically raised from the edge of the inclined portion 2b located at the periphery, and the upper end of the edge 2c forms a square. The shape of the bottom surface 2a in each of the small sections is the same as that in the third embodiment. For example, the first reflecting member 2 is formed by batch pressing a sheet-like thermoplastic resin using a mold or the like.

  The LED light source 3 is installed at the center of the bottom surface 2a of each small section of the first reflecting member 2 as in the first and third embodiments. Moreover, the 2nd reflective member 4 similar to 3rd Embodiment is installed above the light source 3 of each small division.

  The unit-side diffusing member 5a is formed in a square shape that is larger than the square of the second region 43 of the second reflecting member 4 and covers the entire second region 43. Each of the reflecting members 4 is installed on the second region 43.

  Furthermore, in the illumination unit 1c of the present embodiment, the cross-shaped ridge line portion diffusing member is provided along the ridge line portions of the four inclined portions 2b positioned in a cross shape on the vertical and horizontal center lines of the first reflecting member 2. 18 is installed. The ridge line portion diffusing member 18 is formed of the same material as the diffusing member 5a, and functions in the same manner so that the ridge line portions of the four inclined portions 2b positioned in a cross shape on the center line are not darkened. The light from the four light sources 3 is reflected and diffused. Thereby, the illumination unit 1c including the four light sources according to the present embodiment emits light evenly as a whole. The dimensions of the small sections of the first reflecting member 2, the specifications of the light source, and the like are the same as those of the illumination units 1a and 1b of the first and third embodiments. Therefore, in the case of the present embodiment, the length of one side of the unit 1c is 290 mm × 290 mm, which is twice that of the first and third embodiments, and the height is about 30 mm.

  As shown in FIG. 13, the illumination unit 1c of the present embodiment can be used as a four-light source illumination device 10c by itself. The lighting device 10c shown in FIG. 13 has the lighting unit 1c according to the fourth embodiment shown in FIGS. 12A and 12B in a case 7 having a square upper surface opening as viewed from the upper surface surrounding the four circumferences and the bottom surface. The power source system is housed and connected to four light sources 3 in the same manner as shown in FIG. The casing side translucent panel 6 is a square of about 300 mm × 300 mm. This illumination device 10c is used as a surface illumination device.

  Thereby, since the illuminating device 10c provided with 4 light sources of this Embodiment is an illuminating device which employ | adopted the illumination unit 1c of 4 light sources, it becomes a surface illuminating device which can carry out surface emission uniformly as a whole. For example, when a 1 W LED chip is used as each of the four light sources 3 and a current of 350 mA is passed, an illuminance of approximately 3000 lux or more can be obtained at an arbitrary measurement point on the irradiation surface.

  Note that the description of the fourth embodiment has been made with respect to the illumination unit 1c including four small sections each including the four light sources 3. However, the present embodiment is not limited to this, and can also be applied to an illumination unit 1d having a configuration corresponding to one small section as shown in FIG.

(Fifth embodiment)
An illumination device according to a fifth embodiment of the present invention will be described. The illumination device of the present embodiment includes a one-section illumination unit 1d shown in FIG. 14 (an illumination unit having a one-part configuration of the fourth embodiment) and a four-part illumination unit 1c shown in FIG. 15 (fourth implementation). The lighting unit is configured using an appropriate number of four-compartment lighting units.

  As for the one-division lighting unit 1d shown in FIG. 14, only one unit is housed in a square casing as viewed from above, and a single light source is attached by attaching a casing-side translucent panel to the top opening of the casing. A type lighting device can be constructed. Further, with respect to the four-compartment lighting unit 1c shown in FIG. 15, only one unit is used and accommodated in a square housing as viewed from above, and a housing-side translucent panel is attached to the top opening of the housing. Thus, the four-light source type illumination device 10c shown in FIG. 13 can be configured. In the case of the single light source type, the housing case has an outer peripheral size of 150 mm × 150 mm, and the inner size is 145 mm × 145 mm. In the case of the four-light source type, the housing case 7 has an outer peripheral dimension of 300 mm × 300 mm and an inner method of 290 mm × 290 mm.

  FIG. 16 shows an illumination device 110-1 as an example of the fifth embodiment, and the illumination unit 1d of one section of the fourth embodiment shown in FIG. 14 (hereinafter referred to as SLU-1 as an identifier). And the four-compartment type lighting unit 1c shown in FIG. 15 (hereinafter referred to as SLU-4 for identification) are accommodated in SLU-1 × 2, SLU-4 × 2, and a casing 17-1. This is a flat illumination device having a length of 300 mm and a width of 750 mm.

  Moreover, the illuminating device 110-2 shown in FIG. 17 has a configuration in which 4 × 4 SLUs are accommodated in a housing 17-2, and is a square planar illuminating device having a length of 600 mm and a width of 600 mm.

  In this way, according to the illumination devices 110-1 and 110-2 of the present embodiment, by arranging an appropriate number of SLU-1 and an appropriate number of SLU-4 in an appropriate combination, it is almost arbitrary. A flat illumination device having the shape, size, and area of can be configured.

(Sixth embodiment)
As shown in FIGS. 18 and 19, the lighting unit 1e according to the sixth embodiment of the present invention is a second type of lighting unit 1d according to the fourth embodiment shown in FIG. The reflecting member 4a is different in the structure shown in FIGS. 20A and 20B. That is, the first and second regions 41a and 42a having a flat plate shape are attached to the upper ends of the same leg portions 44 as in the first embodiment. Other configurations are the same as those of the one-compartment type lighting unit 1d of the fourth embodiment.

  Similarly to the lighting unit 1a of the first embodiment, the lighting unit 1e of the present embodiment is also accommodated in the casing 17a by arranging an appropriate number of bodies vertically and horizontally as shown in FIGS. Thus, the flat illumination device 100a can be configured. And it can be made to light-emit with uniform brightness to the whole surface of the housing | casing side translucent panel 6 similarly to 1st Embodiment.

(Seventh embodiment)
An illumination unit 1f and an illumination device 10d according to a seventh embodiment of the present invention will be described with reference to FIG. The lighting device 10d of the present embodiment has a configuration in which the lighting unit 1f of the present embodiment is accommodated in the housing 7, and the translucent panel 6 is attached to the upper surface opening of the housing 7. The lighting unit 1f has the following configuration.

  The illumination unit 1f is configured to illuminate the first section of the sixth embodiment with respect to the first reflecting member 2 having the same four sections as the illumination unit 1c of the fourth embodiment shown in FIGS. 12A and 12B. The flat plate-like second reflecting member 4a used in the unit 1e is installed above the light sources 3 in the four sections, and is further formed on the upper surfaces of the first and second regions 41a and 42a of the second reflecting member 4a. Similarly to the sixth embodiment, the diffusion member 5a is attached so as to cover the upper surfaces of the first and second regions 41a and 42a. Similarly to the fourth embodiment, the cross-shaped ridge line part diffusing member 18 is installed along the ridge line of the inclined part 2 b on the vertical and horizontal center lines of the first reflecting member 2.

  The first reflecting member 2 is molded by batch press processing of a sheet-like thermoplastic resin using a mold or the like as in the other embodiments.

  The illumination device 10d according to the present embodiment accommodates the four-compartment type illumination unit 1f in a casing 7 having a shape that surrounds the four circumferences and the bottom surface of the illumination unit 10d. Installed and configured. According to the illuminating device 10d, it is possible to realize an illuminating device in which the entire light emitting surface emits light with uniform intensity, while the illuminating device is equipped with four light sources 3 that are substantially point light sources.

  According to the lighting unit 1f of the present embodiment, an appropriate number of these and the appropriate number of the one-compartment type lighting unit 1e of the sixth embodiment shown in FIGS. 18 and 19 are used simultaneously. Thus, the planar illumination devices 110-1 and 110-2 having any shape and area as in the fifth embodiment shown in FIGS. 16 and 17 can be configured, and the plane having any shape and area can be formed. About the illuminating device 110, similarly to the four-compartment type illuminating device 10d, it is possible to realize an illuminating device in which a large number of light sources 3 that are almost point light sources are mounted, and the entire light emitting surface emits light with uniform intensity.

(Eighth embodiment)
The lighting units 1g and 1h and the four-light source type lighting device 10e according to the eighth embodiment of the present invention will be described with reference to FIGS.

  FIG. 22 shows a four-light source illumination device 10e configured using the four-compartment illumination unit 1g of the present embodiment. As shown in FIGS. 22 and 24, in the four-compartment type lighting unit 1g of the present embodiment, the first reflecting member 2 has a convex curved surface shape (a bowl shape) from each of its four sides with respect to the bottom surface 2a. 4), a square small section is formed simultaneously with four vertical and horizontal sections as viewed from the upper surface on which the inclined portion 2b having a shape) is formed, and the edge 2c is vertically raised from the edge of the inclined portion 2b located at the peripheral edge in the whole. The upper end of the edge 2c has a square shape. The first reflecting member 2 is the same as that of the illumination unit 1c of the fourth embodiment shown in FIGS. 12A and 12B. An LED light source 3 is installed on the bottom surface 2a of each of the four sections. Further, as in the fourth and seventh embodiments, the cross-shaped ridge lines so as to follow the ridge line portions of the four inclined portions 2b positioned in a cross shape on the vertical and horizontal center lines of the first reflecting member 2 A partial diffusion member 18 is installed.

  And in the case of the illumination unit 1g of this Embodiment, the 2nd reflection member 4 or 4a is not installed on each bottom face 2a of the 1st reflection member 2 like other embodiment. The second reflecting member 4b is attached at a position facing each light source 3 of the unit side diffusion panel 5b. The second reflecting member 4b has a flat square shape, and includes the first region 41 and the second region 42 in which the slits 43 are formed as described in other embodiments.

  In FIG. 22, the unit-side diffusion panel 5 b is sized to cover the entire upper surface of the first reflecting member 2 in four sections, and is installed so as to cover the entire upper surface of the first reflecting member 2. The unit-side diffusion panel 5b is reflected and diffused by the light from the light source 3, the first reflecting member 2, and the second reflecting member 4b, similarly to the unit-side diffusing members 5 and 5a in the other embodiments. It is a milky white plate that functions to diffuse and transmit light.

  FIG. 22 shows the housing-side diffused translucent panel 6 and the unit-side diffused panel 5b opened from the upper surface opening of the housing 7, but the lighting device 10e of the present embodiment has the lighting unit 1g configured as described above. Is accommodated in the housing 7, and the unit-side diffusion panel 5b having the second reflecting member 4b attached to each of the four positions facing the light sources 3 as described above is covered so as to cover the entire upper surface of the illumination unit 1g. In addition, the housing side diffuse translucent panel 6 is attached to the upper surface opening of the housing 7.

  FIG. 23 shows a one-compartment type lighting unit 1h according to the present embodiment. In the one-compartment type lighting unit 1h, the first reflecting member 2 has a convex curved surface shape (a bowl shape) from each of its four sides with respect to the bottom surface 2a, and is formed from an upper surface on which an inclined portion 2b is formed. It is composed of only one square section as viewed, and the edge 2c rises vertically from the edge of the inclined part 2b on each of the four sides, and the upper end of the edge 2c forms a square. An LED light source 3 is installed at the center of the bottom surface 2 a of the first reflecting member 2. When a single light source type lighting device is configured using the lighting unit 1h of the present embodiment, the size of the single light source type is the same as the lighting device of the third embodiment shown in FIGS. The unit-side diffusion panel 5b in which the one-part illumination unit 1h is housed in the housing 7 and the second reflecting member 4b is attached at a position corresponding to the light source 3 is provided on the upper surface of the first reflecting member 2. In addition, the casing-side diffused translucent panel 6 a is attached to the upper surface opening of the casing 7.

  According to the illumination unit and the illumination device of the present embodiment, it is possible to realize an illumination device that emits light with uniform intensity over the entire light emitting surface, as in the seventh embodiment. At the same time, in the case of the present embodiment, it is only necessary to attach the second reflecting member 4b to the corresponding position on the back surface of the unit-side diffusion panel 5b when assembling the lighting device 10e. On the other hand, there is an advantage that it is easy to assemble by a much simpler work than the work of installing the second reflecting member 4 above the respective light sources 3. Further, the thickness of the lighting units 1g and 1h can be reduced to about 20 mm, and at the same time, the thickness of the lighting device 10e can be remarkably reduced, and the thickness can be reduced to about 60 mm.

  In addition, in the case of the present embodiment, the unit-side diffusion panel 5b is attached to the entire upper surface of the first diffusion member 2, so that dust and foreign matter can be surely prevented from entering the first reflection member 2. There is also an advantage that can be prevented.

(Ninth embodiment)
A lighting apparatus according to a ninth embodiment of the present invention will be described. The lighting device of the present embodiment includes a one-section lighting unit 1h shown in FIG. 23 (one-section lighting unit in the eighth embodiment) and a four-section lighting unit 1g shown in FIG. 24 (eighth implementation). The lighting unit is configured using an appropriate number of four-compartment lighting units.

  23, only one of the lighting units 1g shown in FIG. 23 is accommodated in a square housing as viewed from above, and the unit-side diffusion panel is disposed on the entire upper surface of the first reflecting member 2 having only one partition. A single light source type illumination device can be configured by attaching 5b and attaching the housing side diffuse translucent panel 6 to the upper surface opening of the housing. Further, with respect to the four-section lighting unit 1h shown in FIG. 24, only one unit is used and accommodated in a square housing as viewed from above, and the unit is provided on the entire top surface of the four-section first reflecting member 2. By attaching the side diffusion panel 5b and further attaching the casing side translucent panel 6 to the upper surface opening of the casing, the four-light source type illumination device 10e of the eighth embodiment shown in FIG. 22 can be configured. In the case of the single light source type, the housing case has an outer peripheral size of 150 mm × 150 mm, and the inner size is 145 mm × 145 mm. In the case of the four-light source type, the housing case 7 has an outer peripheral dimension of 300 mm × 300 mm and an inner method of 290 mm × 290 mm.

  FIG. 25 shows a 10 light source type illumination device 120-1 as an example of the illumination device of the ninth embodiment, and FIG. 26 shows the entire upper surface of a plurality of illumination units 1g, 1h of the illumination device 120-1. The state of the back surface of the unit side diffuse translucent panel 5b to be attached is shown. The material of the unit side diffusion panel 5b is the same as that used in the eighth embodiment. The lighting device 120-1 of the present embodiment includes a one-section lighting unit 1h (hereinafter referred to as SLU-1 as an identifier) of the eighth embodiment shown in FIG. 23 and the eighth lighting unit shown in FIG. The four-division lighting unit 1g of the embodiment (hereinafter referred to as SLU-4 for identification) is housed in SLU-1 × 2, SLU-4 × 2, housing 17-1, On the unit-side diffusion panel 5b attached to the entire upper surface of the plurality of lighting units 1g, 1h, the second reflecting member 4b is attached at a location corresponding to the position of each light source 3. The lighting device 120-1 in this example is a flat lighting device having a length of 300 mm and a width of 750 mm.

  In addition, another example of the illumination device 120-2 shown in FIGS. 27 and 28 has a configuration in which four four-compartment type illumination units 1g (SLU-4) are accommodated in a housing 17-2. On the unit-side diffusion panel 5b attached to the entire upper surface of the plurality of lighting units 1g, the second reflecting member 4b is attached at a location corresponding to the position of each light source 3. The material of the unit side diffusion panel 5b is the same as that used in the eighth embodiment. This illumination device 120-2 is a square planar illumination device having a length of 600 mm and a width of 600 mm.

  In this way, according to the lighting apparatus of the present embodiment, by arranging an appropriate number of SLU-1 and an appropriate number of SLU-4 in an appropriate combination, an almost arbitrary shape, size, and area can be obtained. In addition, a thin flat illumination device can be configured. Since the unit-side diffusion panel 5b is attached to the entire upper surface of the plurality of lighting units, it is possible to prevent intrusion of dust and foreign matter into the first reflecting member 2 of each unit, and the apparatus is maintenance-free for a long time. There is also an advantage that can be used.

(Tenth embodiment)
The illumination units 1c ′ and 1d ′ and the four-light source illumination device 10c ′ according to the tenth embodiment of the present invention will be described with reference to FIGS.

  FIG. 29 shows a four-light source illumination device 10c ′ configured using the four-compartment illumination unit 1c ′ of the present embodiment shown in FIG. As shown in FIGS. 29 and 31, in the four-compartment type lighting unit 1c ′ of the present embodiment, the first reflecting member 2 is the lighting unit 1c of the fourth embodiment shown in FIGS. 12A and 12B. Is the same as An LED light source 3 is installed on the bottom surface 2a of each of the four sections. Further, as in the fourth and seventh embodiments, the cross-shaped ridge lines so as to follow the ridge line portions of the four inclined portions 2b positioned in a cross shape on the vertical and horizontal center lines of the first reflecting member 2 A partial diffusion member 18 is installed. Moreover, the 2nd reflection member 4 or 4a is installed on each bottom face 2a of the 1st reflection member 2 like other embodiment.

  In FIG. 29, the acrylic unit-side transparent panel 50 is sized to cover the entire top surface of the first reflecting member 2 in four sections, and is installed so as to cover the entire top surface of the first reflecting member 2. It is. A unit side diffusion sheet 5 c is attached to the inside of the unit side transparent panel 50. The diffusion sheet 5c is a sheet-like material made of the same material as the unit-side diffusion members 5 and 5a in the other embodiments. These unit-side transparent panels 50 and the diffusion sheet 5c inside thereof form a unit-side diffusion panel.

  FIG. 29 shows the housing-side diffuse translucent panel 6, the unit-side transparent panel 50, and the diffusion seed 5 c inside thereof opened from the upper surface opening of the housing 7, but the illumination device 10 c ′ of the present embodiment. Illuminates the unit-side transparent panel 50 to which the diffusion sheet 5c is attached so that the illumination unit 1c ′ having the above-described configuration is accommodated in the housing 7 and is opposed to each second reflecting member 4 with a space therebetween. The unit 1c ′ is attached so as to cover the entire upper surface, and the casing-side diffused translucent panel 6 is further attached to the upper surface opening of the casing 7.

  FIG. 30 shows a one-compartment type lighting unit 1d ′ of the present embodiment. In the one-compartment type lighting unit 1d ', the first reflecting member 2 has an upper surface on which a sloped portion 2b is formed having a convex curved surface shape (a bowl shape) from each of its four sides with respect to the bottom surface 2a. It is composed of only one square section, and the edge 2c rises vertically from the edge of the inclined part 2b on each of the four sides, and the upper end of the edge 2c forms a square. An LED light source 3 is installed at the center of the bottom surface 2 a of the first reflecting member 2. When a single light source type lighting device is configured using the lighting unit 1d ′ of the present embodiment, the single light source type lighting device is provided, as in the lighting device of the third embodiment shown in FIGS. The one-section type lighting unit 1c 'is accommodated in a casing 7 having a size, and a unit-side transparent panel 50 having a diffusion sheet 5c having the same size as the square shape of the opening of the lighting unit 1c' is attached to the first transparent panel 50. 1 is installed on the upper surface of the reflecting member 2, and the casing-side diffused translucent panel 6 is attached to the upper opening of the casing 7.

  According to the illumination unit and the illumination device of the present embodiment, it is possible to realize an illumination device that emits light with uniform intensity over the entire light emitting surface, as in the eighth embodiment. At the same time, in the case of the present embodiment, in assembling the illuminating device 10 c ′, it is only necessary to attach the diffusion sheet 5 c having substantially the same size to the back surface of the unit-side transparent panel 50. There is an advantage that it is much easier to assemble than the operation of installing the unit-side diffusion member 5a on the top. Further, the thickness of the illumination units 1c ′ and 1d ′ can be reduced to about 20 mm, and at the same time, the thickness of the illumination device 10c ′ can be remarkably reduced, and the thickness can be reduced to about 60 mm. In addition, in the case of the present embodiment, the unit-side transparent panel 50 is attached to cover the entire upper surface of the first diffusion member 2, so that dust and foreign matter can surely enter the first reflecting member 2. There is also an advantage that can be prevented.

(Eleventh embodiment)
An illumination apparatus according to an eleventh embodiment of the present invention will be described. The lighting device according to the present embodiment includes a one-section lighting unit 1d ′ shown in FIG. 30 (one-section lighting unit in the eighth embodiment) and a four-section lighting unit 1c ′ shown in FIG. In this embodiment, a suitable number of four-compartment lighting units) are used.

  As for the one-division lighting unit 1d ′ shown in FIG. 30, only one unit is accommodated in a square-shaped housing as viewed from above, and the diffusion sheet is formed on the entire upper surface of the first reflecting member 2 having only one division. By attaching the unit-side transparent panel 50 attached 5c, and further attaching the housing-side diffusive translucent panel 6 to the upper surface opening of the housing, a one-light source type lighting device can be configured. In addition, the four-compartment lighting unit 1c ′ shown in FIG. 31 is used alone and accommodated in a square-shaped housing as viewed from above, and is placed on the entire top surface of the four-part first reflecting member 2. The four-light source type of the tenth embodiment shown in FIG. 29 is attached by attaching the unit-side transparent panel 50 to which the diffusion sheet 5c is attached and further attaching the housing-side translucent panel 6 to the upper surface opening of the housing. The illumination device 10c ′ can be configured.

  In the case of the single light source type, the housing case has an outer peripheral size of 150 mm × 150 mm, and the inner size is 145 mm × 145 mm. In the case of the four-light source type, the housing case 7 has an outer peripheral dimension of 300 mm × 300 mm and an inner method of 290 mm × 290 mm.

  FIG. 32 shows a 10-light source illumination device 120-3 as an example of the illumination device of the eleventh embodiment. In the case of the lighting device 120-3 in this example, the lighting unit 1d '(SLU-1) in one section of the tenth embodiment shown in FIG. 30 and the four sections in the tenth embodiment shown in FIG. The lighting units 1c ′ (SLU-4) are housed in the casing 17-1 as SLU-1 × 2 and SLU-4 × 2, and the upper surfaces of the plurality of lighting units 1c ′, 1d ′ A diffusion sheet 5c having substantially the same size is attached to the unit side transparent panel 50 attached to the unit. The illumination device 120-3 in this example is a flat illumination device having a length of 300 mm and a width of 750 mm.

  In addition, another example of the illumination device 120-4 shown in FIG. 33 has a configuration in which four four-compartment type illumination units 1c ′ (SLU-4) are accommodated in a housing 17-2. A diffusion sheet 5c having substantially the same size is attached to the transparent unit-side transparent panel 50 attached to the entire upper surface of the plurality of lighting units 1c ′. This illumination device 120-4 is a square planar illumination device having a length of 600 mm and a width of 600 mm.

  In this way, according to the lighting apparatus of the present embodiment, by arranging an appropriate number of SLU-1 and an appropriate number of SLU-4 in an appropriate combination, an almost arbitrary shape, size, and area can be obtained. In addition, a thin flat illumination device can be configured. And since the transparent unit side transparent panel 50 is attached to the upper surface of the whole of the plurality of lighting units, it is possible to prevent the entry of dust and foreign matter into the first reflecting member 2 of each unit, and as a device for a long period of time. There is also an advantage that it can be used without maintenance.

(Twelfth embodiment)
The illumination unit 1i according to the twelfth embodiment of the present invention is characterized by the shape of the back surface of the first reflecting member 2 having four sections. That is, as shown in FIG. 36, the electric wire grooves 8 are formed vertically and horizontally on the lines connecting the four light sources 3 on the back surface of the first reflecting member 2 having the front side shape shown in FIG. . Thereby, with respect to the illuminating device 120-2 of the structure which arranged the multiple illuminating unit 1i as shown in FIG. 27, for example, electric wires are connected between the light sources 3 using the electric wire grooves 8 on the back surface of each illuminating unit 1i. Can be connected vertically or horizontally and connected in series or in parallel. The electric wire groove 8 is also convex on the front side to serve as a reinforcing rib, and reinforces the first reflecting member 2. Moreover, this electric wire groove | channel 8 can be similarly formed in the bottom face of the 1st reflection member 2 in the illumination unit of other embodiment.

(Other embodiments)
In the description of each of the above embodiments, as an example of the light source 3, an example in which white light is output by a box-shaped LED package in which an LED chip that outputs blue light and a fluorescent light emitting unit using a yellow phosphor is stacked is shown. However, the present invention is not limited to this, and other known LEDs can be applied. Moreover, the color of the light emitted from the light source 3 can be arbitrarily set by combining various LED chips and the fluorescent light emitting unit.

  In addition, the first reflecting member 2 has a reverse-headed quadrangular pyramid shape. It doesn't matter.

  The present invention is applied to, for example, an illumination unit and an illumination device used for advertising billboards, sign panels, emergency lights, backlights of various displays and the like.

DESCRIPTION OF SYMBOLS 1a-1i Illumination unit 2 1st reflection member 3 Light source 4, 4a, 4b 2nd reflection member 5, 5a Unit side diffusion member 5b Unit side diffusion panel 5c Diffusion sheet 50 Unit side transparent panel 6 Case side light transmission panel 7 Housing 10a to 10f Illuminating device 12 Power source 16a Housing-side translucent panel 17a, 17-1, 17-2 Housing 18 Edge line diffusing member 41, 41a First region 42, 42a Second region 43 Slit 44 Leg 100a Illumination Device 110-1, 110-2 Lighting device 120-1 to 120-4 Lighting device

Claims (18)

A first reflecting member in the shape of an inverted truncated cone with a bottomed opening;
An LED light source provided at the bottom center of the first reflecting member;
A second reflecting member provided above the LED light source so as to be opposed to the first reflecting member and uniformizing and transmitting light emitted from the LED light source;
A surface light source is provided above the second reflecting member so as to cover the opening of the first reflecting member, and diffuses and transmits the transmitted light of the second reflecting member and the reflected light from the first reflecting member. An illuminating unit comprising: a diffusing member. A first reflecting member having a total of four reflecting sections of a reverse-headed cone with a bottomed opening in two vertical and horizontal sections;
Four LED light sources provided at the bottom center of each reflecting section of the first reflecting member;
Four second reflecting members provided above each of the four LED light sources so as to face each of the reflecting sections, and uniformize and transmit light emitted from each of the LED light sources;
The upper surfaces of the four second reflecting members are provided so as to cover the second reflecting members, and the transmitted light of each of the second reflecting members and the reflected light from the first reflecting member are diffused and transmitted. An illuminating unit comprising four diffusing members that are used as surface light sources.   The illumination unit according to claim 2, wherein a cross-shaped ridge line diffusing member made of the same material as the diffusing member is installed in a boundary portion between the four reflecting sections and the other adjacent reflecting sections. .   The illumination unit according to any one of claims 1 to 3, wherein the diffusion member is formed of a flexible thermoplastic resin sheet having a light reflectance of 97% or more having irregularities on the surface. .   The lighting unit according to any one of claims 1 to 4, wherein the first reflecting member and the second reflecting member are formed of a thermoplastic resin having a light reflectance of 97% or more.   The second reflecting member is disposed continuously with the first region on the periphery of the first region and the first region covering the region directly above the LED light source, and is disposed radially through slits. The illumination unit according to claim 1, further comprising a second region. An illumination group in which an appropriate number of the illumination units according to claim 1 and an appropriate number of the illumination units according to claim 2 or 3 are arranged vertically and horizontally so as to be arranged in a square shape,
An illumination housing that houses the illumination group;
An illuminating device comprising: a translucent panel attached to an upper opening of the illuminating housing. A first reflecting member in the shape of an inverted truncated cone with a bottomed opening;
An LED light source provided at the bottom center of the first reflecting member;
A second reflecting member provided above the LED light source so as to be opposed to the first reflecting member and uniformizing and transmitting light emitted from the LED light source;
An upper surface of the second reflecting member is attached so as to cover the second reflecting member, and diffuses and transmits the transmitted light of the second reflecting member and the reflected light from the first reflecting member. And a diffusing member as a surface light source. A first reflecting member having a total of four reflecting sections of a reverse-headed cone with a bottomed opening in two vertical and horizontal sections;
Four LED light sources provided at the bottom center of each reflecting section of the first reflecting member;
Four second reflecting members provided above each of the four LED light sources so as to face each of the reflecting sections, and uniformize and transmit light emitted from each of the LED light sources;
The upper surface of each of the four second reflecting members is attached so as to cover each of the second reflecting members, and the transmitted light of each of the second reflecting members and the reflected light from the first reflecting member are received. An illumination unit comprising four diffusing members that diffusely transmit and serve as surface light sources.   The lighting unit according to claim 9, wherein a cross-shaped ridge line diffusing member made of the same material as the diffusing member is installed at a boundary portion between the four reflecting sections and the other adjacent reflecting sections. . The diffusion member has a larger area than the second reflection member,
The second reflecting member has a flat plate shape, and is arranged continuously with the first region at the peripheral portion of the first region and the first region covering the region directly above the LED light source, and is radially formed through slits. The lighting unit according to any one of claims 8 to 10, wherein the lighting unit includes a second region disposed on the surface.   The illumination according to any one of claims 8 to 11, wherein the diffusing member is formed of a flexible thermoplastic resin sheet having a light reflectance of 97% or more having irregularities on the surface. unit.   The lighting unit according to any one of claims 8 to 12, wherein the first reflection member and the second reflection member are formed of a thermoplastic resin having a light reflectance of 97% or more. An illumination group in which an appropriate number of the illumination units according to claim 8 and an appropriate number of the illumination units according to claim 9 or 10 are arranged vertically and horizontally so as to be arranged in a square shape,
An illumination housing that houses the illumination group;
An illuminating device comprising: a translucent panel attached to an upper opening of the illuminating housing. A plurality of first inverted reflecting cone-shaped reflecting members having a bottomed opening are arranged vertically and horizontally so as to be arranged in a quadrangular shape within the lighting housing,
Each of the plurality of LED light sources is installed at the bottom center of each of the plurality of first reflecting members,
Disposing a diffusion panel on the entire top surface of the plurality of first reflecting members;
A plurality of second light beams that uniformize and transmit light emitted from each LED light source so as to face each of the first reflecting members at positions corresponding to the upper sides of the LED light sources on the back surface of the diffusion panel. Attach each reflective member of
A lighting device comprising a translucent panel attached to an upper opening of the lighting housing. One or a plurality of first reflecting members having a total of four reflecting sections of the inverted headed cone having a bottomed opening in two vertical and horizontal sections are arranged in a square shape in the lighting housing;
A plurality of LED light sources are respectively installed at the bottom center of each reflection section of each of the one or more first reflecting members,
A diffusion panel is disposed on the entire top surface of the one or more first reflective members;
A plurality of second light beams that uniformize and transmit light emitted from each LED light source so as to face each of the first reflecting members at positions corresponding to the upper sides of the LED light sources on the back surface of the diffusion panel. Attach each reflective member of
A lighting device, wherein a translucent panel is attached to an upper opening of the lighting housing. A first large reflection having an appropriate number of first small reflecting members in the shape of a reverse-headed cone with a bottomed opening and four vertical and horizontal reflective sections of a reverse-headed cone with a bottomed opening. Arrange the appropriate number of members vertically and horizontally so that they are arranged in a square shape in the lighting housing,
Each of the plurality of LED light sources is installed at the bottom central part of each of the appropriate number of first small reflective members and the bottom central part of each of the appropriate number of first large reflective members.
A diffusion panel is disposed on the entire top surface of the plurality of first small reflective members and the first large reflective member;
Radiation from each LED light source so as to oppose each of the first small reflection member and each reflection section of the first large reflection member at a position corresponding to the upper side of each of the LED light sources on the back surface of the diffusion panel. Attaching each of the plurality of second reflecting members to make the transmitted light uniform and transmit,
A lighting device, wherein a translucent panel is attached to an upper opening of the lighting housing.   The second reflecting member is disposed continuously with the first region on the periphery of the first region and the first region covering the region directly above the LED light source, and is disposed radially through slits. The lighting device according to claim 15, further comprising a second region.