JPH07104289A - Lighting device and liquid crystal display device - Google Patents
Lighting device and liquid crystal display deviceInfo
- Publication number
- JPH07104289A JPH07104289A JP5243195A JP24319593A JPH07104289A JP H07104289 A JPH07104289 A JP H07104289A JP 5243195 A JP5243195 A JP 5243195A JP 24319593 A JP24319593 A JP 24319593A JP H07104289 A JPH07104289 A JP H07104289A
- Authority
- JP
- Japan
- Prior art keywords
- light guide
- light
- guide member
- liquid crystal
- crystal display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Liquid Crystal (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Planar Illumination Modules (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
(57)【要約】
【目的】本発明は、コンパクトな外形を有して所定の反
射効率が得られ、組立作業に時間がかからない照明装置
を提供することを目的とする。
【構成】本発明の照明装置は、所定の肉厚を有する平板
形導光部材１の端部１ａに、光源２からの光を反射して
この導光部材１に導入する反射部材３を具備する照明装
置であって、上記導光部材１には反射部材保持部１１が
形成され、上記反射部材に設けられた係止部３１が固定
されている。
【効果】本発明の効果は、平板形導光部材に形成された
反射部材保持部に、反射部材に設けられた係止部が機械
的に簡単に嵌合固定でき、さらに、反射部材を直接固定
しているので、照明装置の外形がコンパクトにできる。
(57) [Summary] [Object] An object of the present invention is to provide a lighting device which has a compact outer shape, can obtain a predetermined reflection efficiency, and does not require much time for assembly work. A lighting device of the present invention comprises a reflection member 3 for reflecting light from a light source 2 and introducing the light into a light guide member 1 at an end 1a of a flat plate light guide member 1 having a predetermined thickness. In the lighting device, the light guide member 1 is provided with a reflection member holding portion 11, and a locking portion 31 provided on the reflection member is fixed. The effect of the present invention is that the locking portion provided on the reflecting member can be mechanically simply fitted and fixed to the reflecting member holding portion formed on the flat light guide member, and the reflecting member can be directly attached. Since it is fixed, the outer shape of the lighting device can be made compact.
Description
【０００１】[0001]
【産業上の利用分野】本発明は背面から光を照射する照
明装置及びこの装置を利用した液晶表示装置に係わり、
特に導光部材と反射部材との接続構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device for irradiating light from the back and a liquid crystal display device using this device.
In particular, it relates to a connection structure between a light guide member and a reflection member.
【０００２】[0002]
【従来の技術】従来、この種の照明装置は実開平３−５
６９７４号公報に開示されている。この照明装置の分解
斜視図を図３に示す。図において、反射板１４は、樋状
に形成され、その内面は鏡面状に加工されている。反射
板１４内部には、蛍光ランプ１２が配置され、導光体２
３の一端に固定されている。また反射板１４の外部は保
護カバー１３で覆われている。2. Description of the Related Art Conventionally, a lighting device of this type has been disclosed in Japanese Utility Model Publication 3-5
It is disclosed in Japanese Patent Publication No. 6974. An exploded perspective view of this lighting device is shown in FIG. In the figure, the reflection plate 14 is formed in a gutter shape, and the inner surface thereof is processed into a mirror surface shape. The fluorescent lamp 12 is disposed inside the reflection plate 14, and the light guide 2
It is fixed to one end of 3. The outside of the reflector 14 is covered with a protective cover 13.
【０００３】すなわち、蛍光ランプ１２は、その両端を
導光体２３の端部に形成されたホルダー２５の凹部に挿
入され、保持されている。さらに、このホルダー２５に
は、ネジ穴３２が形成され、保護カバー１３に形成され
たネジ穴３７にネジ３１をねじ込むことによって、反射
板１４及び保護カバー１３を導光体２３の端部に配置固
定される。したがって、反射板１４を含む保護カバー１
３が導光体２３から着脱自在にすることができる。That is, the fluorescent lamp 12 is held by inserting both ends thereof into the recesses of the holder 25 formed at the ends of the light guide 23. Further, a screw hole 32 is formed in this holder 25, and a screw 31 is screwed into a screw hole 37 formed in the protective cover 13 to dispose the reflection plate 14 and the protective cover 13 at the end of the light guide 23. Fixed. Therefore, the protective cover 1 including the reflector 14
3 can be detached from the light guide 23.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、反射板
１４のみでなく保護カバー１３を使用しており、さらに
導光体２３の端部にホルダー２５を装着する必要がある
ので、照明装置の外形が大きくなる。また、反射板１４
と保護カバー１３の両者を一体にして、ネジ穴３７にネ
ジ３１によって取り付けるため、組立に手間がかかる。However, since not only the reflection plate 14 but also the protective cover 13 is used and the holder 25 needs to be attached to the end portion of the light guide 23, the external shape of the illuminating device is reduced. growing. In addition, the reflector 14
Since both the protective cover 13 and the protective cover 13 are integrated and attached to the screw hole 37 with the screw 31, it takes time to assemble.
【０００５】また、反射板のみの場合には、薄手の反射
板である反射シートを使用し、光源を取り囲むようにし
て、その両端を両面テープや接着剤で導光体に固定する
構造も考えられているが、この場合には、反射シートの
変形が激しく所定の反射効率を得ることができない。ま
た、反射シートの導光体への固定において、両面テープ
や接着剤を使用するので、貼付位置の位置決め等を行な
わなければならず、組立作業に時間がかかる。Further, in the case of only the reflection plate, a structure in which a reflection sheet which is a thin reflection plate is used and the light source is surrounded and both ends thereof are fixed to the light guide body by a double-sided tape or an adhesive is also considered. However, in this case, the reflection sheet is so deformed that a predetermined reflection efficiency cannot be obtained. Further, since the double-sided tape or the adhesive is used for fixing the reflection sheet to the light guide, it is necessary to perform the positioning of the attaching position and the like, and the assembling work takes time.
【０００６】そこで、本発明は上記事情に鑑みなされた
ものであり、コンパクトな外形を有して所定の反射効率
が得られ、組立作業に時間がかからない照明装置及び液
晶表示装置を提供することを目的とする。Therefore, the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an illuminating device and a liquid crystal display device which have a compact outer shape, can obtain a predetermined reflection efficiency, and can be assembled in a short time. To aim.
【０００７】[0007]
【課題を解決するための手段】請求項１の発明は、所定
の肉厚を有する平板形導光部材の端部に、光源からの光
を反射してこの導光部材に導入する反射部材を具備する
照明装置であって、上記導光部材には反射部材保持部が
形成され、上記反射部材に設けられた係止部が固定され
ている。この反射部材保持部は、例えば凹部または凸部
であって、係止部は、これに嵌合する凸部または凹部で
ある構造、また、保持部が挿入孔であって、係止部がこ
れに挿入される突出片である構造、また、保持部が溝で
あって、係止部がこの溝に挿入される凸部である構造
等、機械的な嵌合構造であればなんでもよい。According to a first aspect of the present invention, a reflecting member for reflecting light from a light source and introducing the light into a light guide member is provided at an end of a flat plate light guide member having a predetermined thickness. In the illuminating device provided, a reflecting member holding portion is formed on the light guide member, and a locking portion provided on the reflecting member is fixed. The reflecting member holding portion is, for example, a concave portion or a convex portion, and the locking portion is a convex portion or a concave portion that fits into the concave portion or the convex portion. Any structure may be used as long as it is a mechanical fitting structure, such as a projecting piece that is inserted into the groove, a structure in which the holding portion is a groove, and the locking portion is a convex portion that is inserted into the groove.
【０００８】請求項２の発明は、照明装置において、平
板形導光部材の少なくとも一方の面には光拡散板が配置
されている。この光拡散板は、半透明なシート状のも
の、表面が粗面に加工されたもの等種々ある。According to a second aspect of the invention, in the illuminating device, a light diffusing plate is arranged on at least one surface of the flat plate-shaped light guide member. There are various types of the light diffusion plate, such as a semitransparent sheet-shaped one and a surface having a roughened surface.
【０００９】請求項３の発明は、照明装置において、上
記反射部材の内面には銀色シートが装着されている。こ
の銀色シートは、シート状の基体に銀等を蒸着し、肉厚
が数１０ミクロンと非常に薄手のものである。反射効率
が銀色シートと同程度のものであれば、白色シート等で
もよい。According to a third aspect of the invention, in the lighting device, a silver sheet is attached to the inner surface of the reflecting member. This silver-colored sheet is a very thin sheet having a thickness of several tens of microns formed by vapor-depositing silver on a sheet-shaped substrate. A white sheet or the like may be used as long as it has a reflection efficiency similar to that of a silver sheet.
【００１０】請求項４の発明は、請求項１記載の照明装
置と、上記平板形導光部材の一方の面方向に配置された
液晶表示素子とを具備する。この液晶表示素子は、液晶
表示板でもよい。According to a fourth aspect of the present invention, there is provided the illuminating device according to the first aspect, and a liquid crystal display element arranged in one surface direction of the flat light guide member. The liquid crystal display element may be a liquid crystal display plate.
【００１１】請求項５の発明は、液晶表示装置におい
て、上記平板形導光部材の他方の面に配置された光拡散
板を具備する。この光拡散板は、半透明なシート状のも
の、表面が粗面に加工されたもの等種々ある。According to a fifth aspect of the invention, in the liquid crystal display device, a light diffusing plate is provided on the other surface of the flat light guide member. There are various types of the light diffusion plate, such as a semitransparent sheet-shaped one and a surface having a roughened surface.
【００１２】[0012]
【作用】請求項１の発明の作用は、導光部材に形成され
た反射部材保持部に、反射部材に設けられた係止部が機
械的な嵌合により、固定される。According to the operation of the invention of claim 1, the engaging portion provided on the reflecting member is fixed to the reflecting member holding portion formed on the light guide member by mechanical fitting.
【００１３】請求項２の発明の作用は、照明装置から放
射された光は、光拡散板で拡散される。According to the operation of the invention of claim 2, the light emitted from the illuminating device is diffused by the light diffusing plate.
【００１４】請求項３の発明の作用は、反射部材の内面
の銀色シートにより、光源から放射された光が効率よく
反射され、導光部材端部に導入されて、導光部材表面か
ら放射される。According to the third aspect of the present invention, the light emitted from the light source is efficiently reflected by the silver sheet on the inner surface of the reflecting member, introduced into the end portion of the light guide member, and emitted from the surface of the light guide member. It
【００１５】請求項４の発明の作用は、照明装置から放
射された光は、平板形導光部材の一方の面方向に配置さ
れた液晶表示素子を照射し、液晶の表示を明るくする。According to the operation of the invention of claim 4, the light emitted from the illuminating device illuminates the liquid crystal display element arranged in the direction of one surface of the flat plate-shaped light guide member to brighten the liquid crystal display.
【００１６】請求項５の発明の作用は、液晶表示装置に
おいて、上記平板形導光部材の他方の面に配置された光
拡散板が光を拡散して、液晶表示素子を均一に照射す
る。According to a fifth aspect of the present invention, in the liquid crystal display device, the light diffusing plate disposed on the other surface of the flat plate-shaped light guide member diffuses light to uniformly illuminate the liquid crystal display element.
【００１７】[0017]
【実施例】以下、本発明の一実施例を図１、図２を参照
して説明する。図１は、照明装置を含む液晶表示装置の
分解斜視図であり、この液晶表示装置は、３ないし１０
ｍｍ程度（機種により異なる）の所定の肉厚を有するア
クリル樹脂で成形され、外形が長方形であって平板形導
光部材１と、この端部１ａ，１ａに、ゴムホルダー２ａ
が装着された光源である蛍光ランプ２，２からの光を反
射してこの導光部材１に導入する反射部材３，３とを有
する照明装置と、上記平板形導光部材１の一方の面１ｂ
方向に配置された液晶表示素子４とを具備する。なお、
ゴムホルダー２ａは、銀色シート６も押圧している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an exploded perspective view of a liquid crystal display device including a lighting device.
The light guide member 1 is made of acrylic resin having a predetermined thickness of about mm (depending on the model) and has a rectangular outer shape, and the rubber holder 2a is attached to the end portions 1a and 1a.
An illumination device having reflection members 3 and 3 for reflecting light from fluorescent lamps 2 and 2 as light sources mounted on the light guide member 1 and introducing the light into the light guide member 1; 1b
And a liquid crystal display element 4 arranged in the direction. In addition,
The rubber holder 2a also presses the silver sheet 6.
【００１８】上記平板形導光部材１の端部１ａ，１ａの
表裏の四隅には、反射部材保持部である凹部１１…が形
成されており、また、反射部材３，３には、内方に向か
って４ヶ所にこの凹部１１…に嵌合する係止部である凸
部３１…が形成されている。なお上記凹部ないし凸部が
形成される部材は逆でもよい。また、反射部材保持部１
１…が挿入孔であって、係止部３１…がこれに挿入され
る突出片である構造、また、反射部材保持部１１…が溝
であって、係止部３１…がこの溝に挿入される凸部であ
る構造等、機械的に嵌合できる構造であればなんでもよ
い。At the four corners on the front and back sides of the end portions 1a, 1a of the flat plate-shaped light guide member 1, concave portions 11 ... Are formed as reflecting member holding portions, and the reflecting members 3, 3 are inward. .. are formed at four locations toward the side, and are convex portions 31 .. The members on which the above-mentioned concave portions or convex portions are formed may be reversed. In addition, the reflection member holding portion 1
1 is an insertion hole, and the locking portions 31 are projection pieces to be inserted therein, and the reflection member holding portions 11 are grooves, and the locking portions 31 are inserted in the grooves. Any structure may be used as long as it can be mechanically fitted, such as a structure having a convex portion.
【００１９】また、照明装置には、平板形導光部材１の
少なくとも一方の面１ｃには光拡散板５が配置されてい
る。この光拡散板５は、半透明なシート状のもの、表面
が粗面に加工されたもの等種々ある。さらに、上記反射
部材３，３の内面には銀色シート６が装着されている。
この銀色シート６は、シート状の基体に銀を蒸着し、肉
厚が数１０ミクロンと非常に薄手のものである。なお、
反射効率が銀色シート６と同程度のものであれば、白色
シート等でもよい。Further, in the illuminating device, a light diffusing plate 5 is arranged on at least one surface 1c of the flat light guide member 1. There are various types of the light diffusing plate 5, such as a semitransparent sheet-shaped one and a roughened surface. Further, a silver sheet 6 is attached to the inner surfaces of the reflecting members 3 and 3.
This silver-colored sheet 6 is a very thin sheet having a thickness of several tens of microns formed by vapor-depositing silver on a sheet-shaped substrate. In addition,
A white sheet or the like may be used as long as it has a reflection efficiency similar to that of the silver sheet 6.
【００２０】さらに、この照明装置の組立方法は、ゴム
ホルダー２ａが装着された蛍光ランプ２を平板形導光部
材１の端部１ａに配設し、内面に銀色シート６が装着さ
れた反射部材３，３を外側から押圧し、凹部１１…に凸
部３１…を嵌合させて固定する。このとき、凸部３１
は、反射部材３，３の舌片３２の先端に形成されている
ので、弾性作用を確実にはめ込むことができる。Further, in this method of assembling the illuminating device, the fluorescent lamp 2 having the rubber holder 2a mounted thereon is arranged at the end 1a of the flat plate-shaped light guide member 1, and the reflecting member having the silver sheet 6 mounted on the inner surface thereof. 3 and 3 are pressed from the outside, and the convex portions 31 ... Are fitted into the concave portions 11 and fixed. At this time, the convex portion 31
Is formed at the tip of the tongue piece 32 of the reflecting members 3 and 3, so that the elastic action can be securely fitted.
【００２１】つぎに、本発明の作用を説明する。蛍光ラ
ンプ２，２から放射された光は、直接または反射部材
３，３の内面で反射され、平板形導光部材１の両端部１
ａ，１ａからこの導光部材１内部に入射する。また、こ
の導光部材１の下方に配置された光拡散板５で拡散反射
され、上記導光部材１内部に入射する。そして、上記導
光部材１内部に入射された光は、この上に配置された液
晶表示素子４に入射してこの液晶表示素子４を裏側より
照射する。Next, the operation of the present invention will be described. Light emitted from the fluorescent lamps 2 and 2 is reflected directly or on the inner surfaces of the reflecting members 3 and 3, and both ends 1 of the flat plate-shaped light guide member 1 are reflected.
Light enters the inside of the light guide member 1 from a and 1a. Further, the light is diffused and reflected by the light diffusing plate 5 arranged below the light guide member 1 and enters the inside of the light guide member 1. Then, the light incident on the inside of the light guide member 1 is incident on the liquid crystal display element 4 arranged thereon and illuminates the liquid crystal display element 4 from the back side.
【００２２】したがって、本実施例の効果は、平板形導
光部材１と反射部材３，３とを反射部材保持部１１…と
係止部３１…を使用して直接に嵌合させて機械的に固定
しているので、ネジ穴、ネジ等が不要となり、コンパク
トな外形を得ることができ、さらに、組立作業に時間が
かからなくなる。Therefore, the effect of this embodiment is that the flat plate-shaped light guide member 1 and the reflecting members 3 and 3 are mechanically fitted directly by using the reflecting member holding portions 11 and the locking portions 31. Since it is fixed to, the screw holes, screws, etc. are unnecessary, a compact outer shape can be obtained, and the assembly work does not take time.
【００２３】[0023]
【発明の効果】請求項１の発明の効果は、平板形導光部
材に形成された反射部材保持部に、反射部材に設けられ
た係止部が機械的に簡単に嵌合固定でき、さらに、反射
部材を直接固定しているので、照明装置の外形がコンパ
クトにできる。The effect of the invention of claim 1 is that the engaging portion provided on the reflecting member can be mechanically and easily fitted and fixed to the reflecting member holding portion formed on the flat plate type light guide member. Since the reflecting member is directly fixed, the outer shape of the lighting device can be made compact.
【００２４】請求項２の発明の効果は、蛍光ランプから
放射された光が、光拡散板で拡散反射されるので、平板
形導光部材の表面から放射される光を均一にすることが
できる。According to the second aspect of the present invention, since the light emitted from the fluorescent lamp is diffused and reflected by the light diffusing plate, the light emitted from the surface of the flat light guide member can be made uniform. .
【００２５】請求項３の発明の効果は、反射部材の内面
の銀色シートにより、光源から放射された光が効率よく
反射され、平板形導光部材端部に導入されて、導光部材
の表面から効率よく放射できる。The effect of the invention of claim 3 is that the light emitted from the light source is efficiently reflected by the silver sheet on the inner surface of the reflecting member and is introduced into the end portion of the flat plate-shaped light guiding member, and the surface of the light guiding member. Can be efficiently radiated from.
【００２６】請求項４の発明の効果は、蛍光ランプから
放射された光は、平板形導光部材の一方の面方向に配置
された液晶表示素子を照射し、液晶の表示を明るくする
ことができる。The effect of the invention of claim 4 is that the light emitted from the fluorescent lamp illuminates the liquid crystal display element arranged in one surface direction of the flat plate-shaped light guide member to brighten the liquid crystal display. it can.
【００２７】請求項５の発明の効果は、液晶表示装置に
おいて、上記平板形導光部材の他方の面に配置された光
拡散板が光を反射拡散して、液晶表示素子を均一に照射
することができる。According to a fifth aspect of the present invention, in the liquid crystal display device, the light diffusing plate arranged on the other surface of the flat plate-shaped light guide member reflects and diffuses light to uniformly illuminate the liquid crystal display element. be able to.
【図１】本発明の一実施例を示し、照明装置を含む液晶
表示装置の分解斜視図。FIG. 1 is an exploded perspective view of a liquid crystal display device including a lighting device according to an embodiment of the present invention.
【図２】本発明の一実施例を示し、照明装置の一部縦断
面図。FIG. 2 is a partial vertical cross-sectional view of a lighting device showing an embodiment of the present invention.
【図３】従来の照明装置の分解斜視図。FIG. 3 is an exploded perspective view of a conventional lighting device.
１…平板形導光部材、１ａ，１ａ…端部 ２…蛍光ランプ、２ａ…ゴムホルダー ３…反射部材 ４…液晶表示素子 ６…銀色シート １１…反射部材保持部である凹部 ３１…係止部である凸部 DESCRIPTION OF SYMBOLS 1 ... Flat plate-shaped light guide member 1a, 1a ... Edge part 2 ... Fluorescent lamp 2a ... Rubber holder 3 ... Reflecting member 4 ... Liquid crystal display element 6 ... Silver sheet 11 ... Recessed member holding portion 31 ... Locking portion Convex part that is
Claims (5)
に、光源からの光を反射してこの導光部材に導入する反
射部材を具備する照明装置であって；上記導光部材には
反射部材保持部が形成され、上記反射部材に設けられた
係止部が固定されている；ことを特徴とする照明装置。1. A lighting device, comprising a reflecting member for reflecting light from a light source and introducing the light into a light guide member at an end of a flat plate light guide member having a predetermined thickness; A reflection member holding portion is formed on the member, and a locking portion provided on the reflection member is fixed thereto;
には光拡散板が配置されている；ことを特徴とする請求
項１記載の照明装置。2. The lighting device according to claim 1, wherein a light diffusion plate is disposed on at least one surface of the flat plate-shaped light guide member.
されている；ことを特徴とする請求項１記載の照明装
置。3. A lighting device according to claim 1, wherein a silver sheet is mounted on the inner surface of the reflecting member.
光部材の一方の面方向に配置された液晶表示素子と；を
具備することを特徴とする液晶表示装置。4. A liquid crystal display device comprising: the illuminating device according to claim 1; and a liquid crystal display element arranged in one surface direction of the flat light guide member.
形導光部材の他方の面に配置された光拡散板と；を具備
することを特徴とする液晶表示装置。5. A liquid crystal display device comprising: the liquid crystal display device according to claim 4; and a light diffusing plate disposed on the other surface of the flat light guide member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5243195A JPH07104289A (en) | 1993-09-29 | 1993-09-29 | Lighting device and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5243195A JPH07104289A (en) | 1993-09-29 | 1993-09-29 | Lighting device and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07104289A true JPH07104289A (en) | 1995-04-21 |
Family
ID=17100251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5243195A Pending JPH07104289A (en) | 1993-09-29 | 1993-09-29 | Lighting device and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07104289A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999030192A3 (en) * | 1997-12-09 | 2000-11-09 | Cooper Automotive Prod Inc | Optical waveguide structures for vehicle lighting |
| KR100522319B1 (en) * | 1998-08-27 | 2005-10-18 | 세이코 엡슨 가부시키가이샤 | Backlight unit and electronic apparatus |
| JP2006185724A (en) * | 2004-12-27 | 2006-07-13 | Minebea Co Ltd | Planar lighting system |
| WO2012101940A1 (en) * | 2011-01-28 | 2012-08-02 | 富士フイルム株式会社 | Planar lighting device |
-
1993
- 1993-09-29 JP JP5243195A patent/JPH07104289A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999030192A3 (en) * | 1997-12-09 | 2000-11-09 | Cooper Automotive Prod Inc | Optical waveguide structures for vehicle lighting |
| KR100522319B1 (en) * | 1998-08-27 | 2005-10-18 | 세이코 엡슨 가부시키가이샤 | Backlight unit and electronic apparatus |
| JP2006185724A (en) * | 2004-12-27 | 2006-07-13 | Minebea Co Ltd | Planar lighting system |
| JP4547704B2 (en) * | 2004-12-27 | 2010-09-22 | ミネベア株式会社 | Surface lighting device |
| WO2012101940A1 (en) * | 2011-01-28 | 2012-08-02 | 富士フイルム株式会社 | Planar lighting device |
| JP2012156092A (en) * | 2011-01-28 | 2012-08-16 | Fujifilm Corp | Surface lighting device |
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