JP3074747B2 - Lighting equipment - Google Patents
Lighting equipmentInfo
- Publication number
- JP3074747B2 JP3074747B2 JP2843491A JP2843491A JP3074747B2 JP 3074747 B2 JP3074747 B2 JP 3074747B2 JP 2843491 A JP2843491 A JP 2843491A JP 2843491 A JP2843491 A JP 2843491A JP 3074747 B2 JP3074747 B2 JP 3074747B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- guide plate
- rod
- light guide
- light source
- 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.)
- Expired - Fee Related
Links
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Optical Elements Other Than Lenses (AREA)
- Planar Illumination Modules (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、薄型の照明装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin lighting device.
【０００２】さらに詳しくは、棒状光源と導光系よりな
る照明装置に関する。[0002] More specifically, the present invention relates to a lighting device comprising a rod-like light source and a light guide system.
【０００３】[0003]
【従来の技術】従来、棒状光源と導光系よりなる証明装
置は、図２に示すように導光板１０１と、導光板１０１
表面に印刷または形状付加した拡散系１０９と、導光板
１０１の上面、下面および光導入端面１０５にそれぞれ
隣接配置した拡散膜１１０、乱反射板１１１および棒状
光源１０７より構成されており、さらに棒状光源１０７
および光導入端面１０５を覆うように白色または銀白色
の反射シート１０８を設け、反射シート１０８の端部を
導光板１０１の光導入端面１０５に隣接する面の端部に
貼り付けていた。2. Description of the Related Art Conventionally, a certification device comprising a rod-shaped light source and a light guide system includes a light guide plate 101 and a light guide plate 101 as shown in FIG.
It is composed of a diffusion system 109 having a surface printed or added with a shape, a diffusion film 110, an irregular reflection plate 111 and a rod-shaped light source 107 disposed adjacent to the upper and lower surfaces of the light guide plate 101 and the light introduction end face 105, respectively.
In addition, a white or silver-white reflecting sheet 108 is provided so as to cover the light introducing end face 105, and an end of the reflecting sheet 108 is attached to an end of a surface of the light guide plate 101 adjacent to the light introducing end face 105.
【０００４】[0004]
【発明が解決しようとする課題】しかし、かかる従来の
照明装置は棒状光源から発せられた光線に対して、光導
入端面から導光板に入射する効率が低く、結果として輝
度が低いという問題点を有していた。However, such a conventional illuminating device has a problem that light emitted from a rod-shaped light source has a low efficiency of being incident on the light guide plate from the light introduction end face, resulting in low brightness. Had.
【０００５】そこで、本発明は従来のこのような問題点
を解決するため、導光板を用いるという基本構造を変え
ずに、薄型で、輝度が高く、輝度均一性といった光学的
に品質の高い照明装置を提供することを目的とする。In order to solve the above-mentioned problems, the present invention does not change the basic structure of using a light guide plate, but is thin, has high brightness, and has high optical quality such as brightness uniformity. It is intended to provide a device.
【０００６】[0006]
【課題を解決するための手段】本発明の照明装置は、導
光板と棒状光源を有する照明装置において、前記照明装
置は、前記導光板の反出光面側に概長方形断面をなす溝
と、該溝部内に配置した前記棒状光源とを有し、該反出
光面および該溝部の底面には、前記光源からの光を前記
導光板を拡散する拡散系が形成され、かつ、前記溝部の
底面と前記棒状光源の間には遮光層が設けられているこ
とを特徴とする。According to the present invention, there is provided an illuminating device having a light guide plate and a rod-shaped light source, wherein the illuminator includes a groove having a substantially rectangular cross section on the side opposite to the light exit surface of the light guide plate. Having the rod-shaped light source disposed in the groove portion, a diffusion system for diffusing the light from the light source through the light guide plate is formed on the light emitting surface and the bottom surface of the groove portion, and the bottom surface of the groove portion. A light-shielding layer is provided between the rod-shaped light sources.
【０００７】[0007]
【実施例】以下に本発明の実施例を図面に基づいて説明
する。図１において、導光板１は概長方形で一定の厚み
を持つ透明な板であり、反出光面３側に溝４が設けてあ
って少なくとも出光面２と反出光面３、望ましくは全て
の面が鏡面（平滑面）により構成される。導光板１の材
質としては、光吸収が少なく、屈折率が空気より大きい
透明材料なら何でもよいが、特に屈折率１．４１以上で
あることが望ましく、アクリル樹脂、ポリカーボネート
樹脂、ポリスチレン樹脂、ガラス等が用いられる。屈折
率が１．４１以上の場合、臨界角が４５度以下となり導
光板１に入射した全ての光線は光導入面４と概直角をな
す鏡面で全反射をすることができる。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a light guide plate 1 is a transparent plate having a substantially rectangular shape and a constant thickness, and a groove 4 is provided on a side opposite to a light exit surface 3 so that at least a light exit surface 2 and a reverse light exit surface 3, preferably all surfaces. Is constituted by a mirror surface (smooth surface). As the material of the light guide plate 1, any material may be used as long as it is a transparent material having a small light absorption and a refractive index higher than that of air. Is used. When the refractive index is 1.41 or more, the critical angle becomes 45 degrees or less, and all light rays incident on the light guide plate 1 can be totally reflected by a mirror surface that is substantially perpendicular to the light introduction surface 4.
【０００８】溝４には棒状光線７が配置される。棒状光
線７としては蛍光管を用いる。棒状光源７としては白熱
灯、直線状に配列された発光ダイオード、光ファイバー
により導入された光等何でもよいが、発光効率、色、取
り扱い等の条件により蛍光管が適している。A rod-like light beam 7 is arranged in the groove 4. A fluorescent tube is used as the rod-shaped light beam 7. The rod-shaped light source 7 may be any of an incandescent lamp, light-emitting diodes arranged in a straight line, and light introduced by an optical fiber, but a fluorescent tube is suitable depending on conditions such as luminous efficiency, color, and handling.
【０００９】導光板１の反出光面３および溝底面６には
印刷または形状付加により拡散系９が設けられている。
拡散系９は反出光面３および溝底面６上に網点状または
細線状に形成され鏡面部に対してある分布を持ってい
る。これは、導光板１の光導入面５より入射した光線が
出光面２、反出光面３等の光導入面５と概直角をなす鏡
面により全反射し、導光板１中を光導入面５からより遠
くに進むのに対して、ある確率で拡散系９に到達し一部
が出光面２より出光するのに必要なためである。A diffusion system 9 is provided on the light exit surface 3 and the groove bottom surface 6 of the light guide plate 1 by printing or adding a shape.
The diffusion system 9 is formed in a halftone or fine line shape on the light exit surface 3 and the groove bottom surface 6 and has a certain distribution with respect to the mirror surface. This is because light rays incident from the light introduction surface 5 of the light guide plate 1 are totally reflected by mirror surfaces that are substantially perpendicular to the light introduction surface 5 such as the light exit surface 2 and the counter light exit surface 3. This is because it is necessary to reach the diffusion system 9 at a certain probability and to emit a part of the light from the light output surface 2 while traveling farther from the light source.
【００１０】導光板１の出光面２側には拡散膜１０を隣
接配置し、反出光面３側には乱反射板１１を隣接配置し
ている。また、さらに溝底面６にも乱反射板１１を隣接
配置している。拡散膜１０および乱反射板１１は導光板
１に対してわずかな空気層を介して隣接配置されてお
り、このことは前述した臨界角による全反射のために必
要である。拡散膜１０は出光面２より出光した光線を拡
散させ均一化する。乱反射板１１は、拡散系９で拡散し
たのち出光面２で反射し、反出光面３を通過した光線、
拡散膜１０により反射して導光板１を通過した光線等を
さらに拡散膜１０側に戻す働きをする。A diffusing film 10 is arranged adjacent to the light exit surface 2 of the light guide plate 1, and a diffuse reflection plate 11 is arranged adjacent to the light exit surface 3. Further, the irregular reflection plate 11 is also arranged adjacent to the groove bottom surface 6. The diffusion film 10 and the diffuse reflection plate 11 are disposed adjacent to the light guide plate 1 with a slight air layer therebetween, which is necessary for the above-described total reflection at the critical angle. The diffusion film 10 diffuses the light emitted from the light emitting surface 2 and makes it uniform. The diffuse reflection plate 11 is a light beam that is diffused by the diffusion system 9, is reflected by the light exit surface 2, and passes through the anti-light exit surface 3.
Light rays reflected by the diffusion film 10 and passed through the light guide plate 1 are further returned to the diffusion film 10 side.
【００１１】拡散膜１０としては乳白色のポリエステル
シート等、乱反射板１１としては白色のポリエステルシ
ート等が用いられるが、前述した目的が達成される物な
らば何でも良い。また溝底面６に配置した乱反射板１１
は棒状光源７からの光線が直接、溝底面６より入光しな
いために遮光性の高いものの使用が望ましいが、そうで
はない場合、必要に応じて遮光層１２を設ける。As the diffusion film 10, a milky white polyester sheet or the like is used, and as the irregular reflection plate 11, a white polyester sheet or the like is used. Any material can be used as long as the object described above is achieved. Also, the irregular reflection plate 11 arranged on the groove bottom surface 6
In order to prevent light from the rod-shaped light source 7 from directly entering the groove bottom 6, it is preferable to use a material having a high light-shielding property. However, if not, a light-shielding layer 12 is provided as necessary.
【００１２】さらに棒状光源７とともに溝４を覆うよう
に反射シート８を設けてある。反射シート８は棒状光源
７からの光線を効果的に光導入面５に導く働きをしてお
り、白色または銀白色のシートが用いられ、銀蒸着ポリ
エステルシートが特に有効である。また反射シート８は
反出光面３上の乱反射板１１と共通、一体化してもよ
い。Further, a reflection sheet 8 is provided so as to cover the groove 4 together with the rod-shaped light source 7. The reflection sheet 8 has a function of effectively guiding the light from the rod-shaped light source 7 to the light introduction surface 5, and a white or silver-white sheet is used, and a silver-evaporated polyester sheet is particularly effective. Further, the reflection sheet 8 may be shared or integrated with the irregular reflection plate 11 on the light exit surface 3.
【００１３】導光板１の端面については前述のように鏡
面であることが望ましく、必ずしも必要ということはな
いが、さらに白色または銀白色のシート等を隣接配置す
ることにより、端面から出光する光線を再び導光板１へ
戻すことが期待でき、効率向上に寄与する。The end surface of the light guide plate 1 is desirably a mirror surface as described above, and it is not always necessary. However, by further arranging a white or silver-white sheet adjacent thereto, light emitted from the end surface can be reduced. It can be expected to return to the light guide plate 1 again, which contributes to an improvement in efficiency.
【００１４】以上のような構成において、棒状光源７か
らの光線は光導入面５より入光し、拡散系９により、拡
散されて出光面２より出光する。そして反出光面３上お
よび溝底面６上の拡散系９について適当な分布をもたせ
ることにより、棒状光源７直上であるかどうかに関係な
く均一な輝度分布、色分布をもった照明装置を実現でき
る。In the above configuration, the light from the rod-shaped light source 7 enters from the light introduction surface 5, is diffused by the diffusion system 9, and exits from the light exit surface 2. By providing an appropriate distribution for the diffusion system 9 on the light exit surface 3 and on the groove bottom surface 6, it is possible to realize an illumination device having a uniform luminance distribution and color distribution irrespective of whether it is right above the rod-shaped light source 7. .
【００１５】また従来の導光板端面に光源を配置した照
明装置に比べ、従来、光源の光導入端面と対向する側よ
り発せられた光線は、あまり効果的には導光板に導かれ
なかったのに対し、本発明の構成では棒状光源７の両側
に光導入面５があるため、導光板１への入光が有効に行
なわれる。このことは、すなわち照明装置全体の効率を
高め、高い輝度を得ることができることを示す。Also, compared with the conventional lighting device in which the light source is arranged on the end face of the light guide plate, the light beam emitted from the side facing the light introduction end face of the light source has not been guided to the light guide plate very effectively. On the other hand, in the configuration of the present invention, since the light introducing surfaces 5 are provided on both sides of the rod-shaped light source 7, light entering the light guide plate 1 is effectively performed. This means that the efficiency of the entire lighting device can be increased and high luminance can be obtained.
【００１６】さらに導光板１の厚み内に棒状光源７を納
めることにより全体の厚みを抑えることができる。Further, the entire thickness can be suppressed by placing the rod-shaped light source 7 within the thickness of the light guide plate 1.
【００１７】[0017]
【発明の効果】本発明によると、以上説明したように、
導光板に溝を設け、そこに棒状光源を配設するといった
構造とすることにより、従来どおり薄型のまま、輝度が
高く、均一な発光分布を持った品質の高い照明装置を提
供することができる。According to the present invention, as described above,
By adopting a structure in which a groove is formed in a light guide plate and a bar-shaped light source is provided therein, a high-quality lighting device having high luminance and uniform light emission distribution can be provided while being thin as before. .
【図１】本発明の一実施例を示す図。FIG. 1 is a diagram showing one embodiment of the present invention.
【図２】従来の技術を示す図。FIG. 2 is a diagram showing a conventional technique.
１ 導光板 ２ 出光面 ３ 反出光面 ４ 溝 ５ 光導入面 ６ 溝底面 ７ 棒状光源 ８ 反射シート ９ 拡散系 １０ 拡散膜 １１ 乱反射板 １２ 遮光層 １０１ 導光板 １０５ 光導入端面 １０７ 棒状光源 １０８ 反射シート １０９ 拡散系 １１０ 拡散膜 １１１ 乱反射板 REFERENCE SIGNS LIST 1 light guide plate 2 light emitting surface 3 anti-light emitting surface 4 groove 5 light introduction surface 6 groove bottom 7 rod-shaped light source 8 reflection sheet 9 diffusion system 10 diffusion film 11 irregular reflection plate 12 light shielding layer 101 light guide plate 105 light introduction end face 107 rod-shaped light source 108 reflection sheet 109 Diffusion system 110 Diffusion film 111 Diffuse reflector
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 6/00 331 F21V 8/00 601 G02F 1/1335 530 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) G02B 6/00 331 F21V 8/00 601 G02F 1/1335 530
Claims (1)
て、 前記照明装置は、前記導光板の反出光面側に概長方形断
面をなす溝と、該溝部内に配置した前記棒状光源とを有
し、 該反出光面および該溝部の底面には、前記光源からの光
を前記導光板を拡散する拡散系が形成され、かつ、前記
溝部の底面と前記棒状光源の間には遮光層が設けられて
いることを特徴とする照明装置。1. An illumination device having a light guide plate and a rod-shaped light source, wherein the illumination device has a groove having a substantially rectangular cross section on the side opposite to the light exit surface of the light guide plate, and the rod-shaped light source disposed in the groove. A diffusion system for diffusing the light from the light source through the light guide plate is formed on the light exit surface and the bottom surface of the groove, and a light shielding layer is provided between the bottom surface of the groove and the rod-shaped light source. A lighting device, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2843491A JP3074747B2 (en) | 1991-02-22 | 1991-02-22 | Lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2843491A JP3074747B2 (en) | 1991-02-22 | 1991-02-22 | Lighting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04267204A JPH04267204A (en) | 1992-09-22 |
| JP3074747B2 true JP3074747B2 (en) | 2000-08-07 |
Family
ID=12248562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2843491A Expired - Fee Related JP3074747B2 (en) | 1991-02-22 | 1991-02-22 | Lighting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3074747B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10102585A1 (en) * | 2001-01-20 | 2002-07-25 | Philips Corp Intellectual Pty | Mixed colour luminair with differently coloured light sources and light emission surface |
| DE10102586A1 (en) * | 2001-01-20 | 2002-07-25 | Philips Corp Intellectual Pty | Luminair with light emission surface and punctiform light sources |
| JP2007141546A (en) * | 2005-11-16 | 2007-06-07 | Radiant Opt-Electronics Corp | Optical mixing plate and direct backlight using it |
| JPWO2013150908A1 (en) * | 2012-04-06 | 2015-12-17 | 興和株式会社 | Light guiding device and lighting device |
-
1991
- 1991-02-22 JP JP2843491A patent/JP3074747B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04267204A (en) | 1992-09-22 |
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