JPS6273502A - Light guide plate - Google Patents
Light guide plateInfo
- Publication number
- JPS6273502A JPS6273502A JP21237985A JP21237985A JPS6273502A JP S6273502 A JPS6273502 A JP S6273502A JP 21237985 A JP21237985 A JP 21237985A JP 21237985 A JP21237985 A JP 21237985A JP S6273502 A JPS6273502 A JP S6273502A
- Authority
- JP
- Japan
- Prior art keywords
- light guide
- guide plate
- plate
- light
- transparent acrylic
- 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)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、液晶バックライト製品の特に導光板上面の輝
度均一を図るのに好適な液晶バックライト用導光板に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a light guide plate for a liquid crystal backlight, which is suitable for achieving uniform brightness of a liquid crystal backlight product, particularly on the upper surface of the light guide plate.
従来の装置は、特開昭５２−３９３９８号に記載のよう
に、導光板底面を鋸状に加工したものなどとなっていた
。しかし導光板上面輝度はどうしても光源側が高く輝度
均一面とはならなかった。In conventional devices, the bottom surface of the light guide plate is machined into a saw shape, as described in Japanese Patent Application Laid-Open No. 52-39398. However, the brightness on the top surface of the light guide plate was high on the light source side, and the brightness was not uniform.
本発明の目的は、導光板の構造を斜めに位置させた透明
アクリル板と反射板、拡散板の組合せとし、導光板上面
の輝度均一化をはかることにある。An object of the present invention is to provide a light guide plate with a combination of an obliquely positioned transparent acrylic plate, a reflection plate, and a diffuser plate, thereby achieving uniform brightness on the upper surface of the light guide plate.
導光板により、蛍光ランプの光を導光板上面に放射させ
る際、透明アクリルで蛍光ランプからの光の放射をさえ
ぎると一部はアクリルによって反射され、一部は透過す
るとの考え方に基づいて本発明装置の原理を考案した。The present invention is based on the idea that when a light guide plate emits light from a fluorescent lamp onto the upper surface of the light guide plate, if the light from the fluorescent lamp is blocked by transparent acrylic, some of it will be reflected by the acrylic and some of it will be transmitted. devised the principle of the device.
本発明の導光板は、光輝面を形成する拡散板と、上記拡
散板に対して所定間隔をおいて固定された反射板と、上
記拡散板と反射板とのなす空間に。The light guide plate of the present invention includes a diffuser plate forming a bright surface, a reflector plate fixed to the diffuser plate at a predetermined distance, and a space formed by the diffuser plate and the reflector plate.
光源からの光の一部を拡散板に向けて反射し吸光される
部分を除く残余の光を透過せしめる複数の部分反射板を
適宜の間隔と傾斜をもって配設したことを特徴とするも
のである。It is characterized by a plurality of partial reflecting plates arranged at appropriate intervals and inclinations to reflect part of the light from the light source toward the diffuser plate and transmit the remaining light except for the absorbed part. .
以下、本発明の一実施例を第１図、第２図により説明す
る。平面光源システムの構成は、第１図の平面図、第２
図の側面図で表わされるように反射板２で囲まれた内部
に透明アクリル板３が複数枚斜めに位置し、さらにその
上から拡散板４がフタをするようになっている。光源１
から放射された光７は、透明アクリル板に当たり、一部
は反射され矢印６方向へ、一部は透過し矢印５方向へ導
かれる。また全ての透明アクリル板３を透過した光は囲
まれた反射板により全反射され、最終的に拡散板４方向
へむかう。また、透明アクリルを透過するに従い、輝度
は低下するが、透明アクリルの板厚の変化、また透明ア
クリルの位置の変化により、拡散板上面における輝度均
一化の最適条件が見い出せる。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The configuration of the flat light source system is shown in the plan view in Figure 1 and in Figure 2.
As shown in the side view of the figure, a plurality of transparent acrylic plates 3 are diagonally positioned inside the reflective plate 2, and a diffuser plate 4 covers the transparent acrylic plates 3 from above. light source 1
The light 7 emitted from the transparent acrylic plate hits the transparent acrylic plate, and part of it is reflected in the direction of arrow 6, and part of it is transmitted and guided in the direction of arrow 5. Furthermore, the light that has passed through all the transparent acrylic plates 3 is totally reflected by the surrounding reflecting plates, and finally heads toward the diffuser plate 4. Furthermore, as the light passes through the transparent acrylic, the brightness decreases, but by changing the thickness of the transparent acrylic and changing the position of the transparent acrylic, the optimum conditions for uniform brightness on the upper surface of the diffuser plate can be found.
本発明によれば、輝度均一化の図れた面光源の液晶バッ
クライト用導光板を得られるという効果がある。According to the present invention, it is possible to obtain a light guide plate for a liquid crystal backlight of a surface light source with uniform brightness.
第１図は１本発明平面光源システムの平面図、第２図は
、側面図である。
１・・・光ｔＸ（蛍光ランプ）、２・・・反射板、３・
・・透明アクリル板、４・・・拡散板、５・・・透過し
た光、６・・・反射した光、７・・光源より放射された
光。FIG. 1 is a plan view of the flat light source system of the present invention, and FIG. 2 is a side view. 1... Light tX (fluorescent lamp), 2... Reflector, 3...
...Transparent acrylic plate, 4...Diffusion plate, 5...Transmitted light, 6...Reflected light, 7...Light emitted from the light source.
Claims (1)
明アクリル板を斜めに重ね合わせるよう位置させ、また
反射板、拡散板との組み合せにより導光板上面部の輝度
を均一にしたことを特徴とする導光板。A light guide plate for a liquid crystal backlight system, characterized in that transparent acrylic plates are positioned diagonally overlapping each other, and the brightness of the upper surface of the light guide plate is made uniform by combining with a reflection plate and a diffuser plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21237985A JPS6273502A (en) | 1985-09-27 | 1985-09-27 | Light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21237985A JPS6273502A (en) | 1985-09-27 | 1985-09-27 | Light guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6273502A true JPS6273502A (en) | 1987-04-04 |
Family
ID=16621594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21237985A Pending JPS6273502A (en) | 1985-09-27 | 1985-09-27 | Light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6273502A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH036691A (en) * | 1989-06-02 | 1991-01-14 | Matsushita Refrig Co Ltd | Commodity exhibition chamber for automatic vending machine |
-
1985
- 1985-09-27 JP JP21237985A patent/JPS6273502A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH036691A (en) * | 1989-06-02 | 1991-01-14 | Matsushita Refrig Co Ltd | Commodity exhibition chamber for automatic vending machine |
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