JPH05341133A - Light guide plate and surface light source device - Google Patents
Light guide plate and surface light source deviceInfo
- Publication number
- JPH05341133A JPH05341133A JP4153791A JP15379192A JPH05341133A JP H05341133 A JPH05341133 A JP H05341133A JP 4153791 A JP4153791 A JP 4153791A JP 15379192 A JP15379192 A JP 15379192A JP H05341133 A JPH05341133 A JP H05341133A
- Authority
- JP
- Japan
- Prior art keywords
- guide plate
- light guide
- light
- light source
- layer pattern
- 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.)
- Granted
Links
Landscapes
- Liquid Crystal (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は面光源装置に使用する導
光板及び液晶表示のバックライトに使用する面光源装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate used for a surface light source device and a surface light source device used for a backlight of a liquid crystal display.
【０００２】面光源装置は、輝度が均一であること及び
輝度が高いことが要求される。The surface light source device is required to have uniform brightness and high brightness.
【０００３】[0003]
【従来の技術】従来の面光源装置１は、図５に示すよう
に、導光板２と、導光板本体２Ａの背面２Ａａ及び前面
（光出射面）２Ａｂに対向して導光板２を挟み込む反射
板３及び拡散板４と、導光板本体２Ａの側端面２Ａｃに
沿って配された冷陰極管５と、内面が反射面６ａとなっ
ており、冷陰極管５を覆うホルダ６等よりなる構成であ
る。2. Description of the Related Art A conventional surface light source device 1 is, as shown in FIG. 5, a reflection that sandwiches a light guide plate 2 so as to face a light guide plate 2 and a back surface 2Aa and a front surface (light emission surface) 2Ab of a light guide plate body 2A. The plate 3 and the diffusing plate 4, the cold cathode tube 5 arranged along the side end surface 2Ac of the light guide plate body 2A, the inner surface serving as the reflecting surface 6a, and the holder 6 for covering the cold cathode tube 5 and the like. Is.
【０００４】導光板２は、アクリル樹脂板である導光板
本体２Ａの背面２Ａａに、白色ペイントをスクリーン印
刷してなる拡散反射層パターン７が、冷陰極管５に近い
側が小さく冷陰極管５よ遠くなるにつれて大きくなる所
定のパターンで形成された構成である。The light guide plate 2 has a diffuse reflection layer pattern 7 formed by screen-printing white paint on the back surface 2Aa of the light guide plate body 2A which is an acrylic resin plate. This is a configuration formed in a predetermined pattern that becomes larger as the distance increases.
【０００５】この拡散反射層パターン７は、拡大すれ
ば、図６に示すように、多くの粒子８を含んだ組成であ
り、導光板２（導光板本体２Ａ）内を伝播した光９を、
符号１０で示すように拡散させる。If the diffuse reflection layer pattern 7 is enlarged, it has a composition containing many particles 8 as shown in FIG. 6, and the light 9 propagating in the light guide plate 2 (light guide plate body 2A) is
Spread as indicated by reference numeral 10.
【０００６】ホルダ６は、その一方の端部６ｂを拡散板
４上に位置させ、且つその他方の端部６ｃを反射板３上
に位置させて、拡散板４、導光板２及び反射板３を挟み
込んで設けてある。The holder 6 has its one end 6b positioned on the diffusion plate 4 and the other end 6c positioned on the reflection plate 3 so that the diffusion plate 4, the light guide plate 2 and the reflection plate 3 are positioned. Is sandwiched between.
【０００７】なお、反射板３は、図６中符号１１で示す
ように、光を反射させて導光板本体２Ａのうち冷陰極管
５より遠い奥部まで伝播させるために設けてある。The reflecting plate 3 is provided for reflecting the light and propagating it to the inner part of the light guide plate body 2A farther from the cold cathode tubes 5 as shown by reference numeral 11 in FIG.
【０００８】[0008]
【発明が解決しようとする課題】上記の面光源装置１の
輝度の分布は、図４中、線IIで示す如くに、冷陰極管５
から離れるにつれて徐々に低下するものとなり、輝度は
不均一であった。The brightness distribution of the above-mentioned surface light source device 1 has a cold cathode fluorescent lamp 5 as shown by a line II in FIG.
The brightness gradually decreased with increasing distance from the sample, and the brightness was non-uniform.
【０００９】そこで、本発明は輝度の不均一性を改善し
た導光板及び面光源装置を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a light guide plate and a surface light source device with improved non-uniformity of brightness.
【００１０】[0010]
【課題を解決するための手段】請求項１の発明は、導光
板本体と、該導光板本体の背面に所定のパターンで形成
された拡散反射層パターンとよりなり、背面側の反射板
と前面側の拡散板とに挟まれ、側端面から光を入射され
る導光板において、上記拡散反射層パターンが、透明又
は半透明の樹脂製の拡散反射層パターンである構成とし
たものである。According to a first aspect of the present invention, there is provided a light guide plate main body and a diffuse reflection layer pattern formed on the back surface of the light guide plate main body in a predetermined pattern. In the light guide plate which is sandwiched between the side diffuser plate and receives light from the side end face, the diffuse reflection layer pattern is a transparent or semitransparent resin diffuse reflection layer pattern.
【００１１】請求項２の発明は、請求項１記載の拡散反
射層パターンが、蛍光色素を含有した透明又は半透明の
樹脂製の拡散反射層パターンである構成としたものであ
る。請求項３の発明は、導光板本体と、該導光板本体の
背面に透明もしくは半透明の樹脂により所定のパターン
で形成された拡散反射層パターンとよりなる導光板と、
該導光板本体の背面側に配された反射板と、該導光板本
体の前面側に配された拡散板と、上記導光板本体の側端
面より光を入射させるライン光源とよりなる構成とした
ものである。According to a second aspect of the present invention, the diffuse reflection layer pattern according to the first aspect is a diffuse reflection layer pattern made of a transparent or semitransparent resin containing a fluorescent dye. According to a third aspect of the present invention, a light guide plate including a light guide plate main body and a diffuse reflection layer pattern formed on the back surface of the light guide plate main body in a predetermined pattern by a transparent or semitransparent resin,
The light guide plate main body is provided with a reflecting plate, a diffuser plate is provided on the front side of the light guide plate main body, and a line light source that allows light to enter from a side end surface of the light guide plate main body. It is a thing.
【００１２】請求項４の発明は、導光板と、該導光板を
挟む反射板と拡散板と、該導光板の側端面に沿って配さ
れたライン光源と、該ライン光源を覆うべく配されたホ
ルダとよりなる面光源装置１において、該ホルダの端
を、夫々上記反射板と導光板との間及び上記拡散板と導
光板との間に挟み込んだ構成としたものである。According to a fourth aspect of the present invention, a light guide plate, a reflection plate and a diffusion plate sandwiching the light guide plate, a line light source arranged along a side end surface of the light guide plate, and a line light source arranged to cover the line light source. In the surface light source device 1 including a holder, the ends of the holder are sandwiched between the reflection plate and the light guide plate and between the diffusion plate and the light guide plate, respectively.
【００１３】請求項５の発明は、導光板と、該導光板を
挟む反射板と拡散板と、該 導光板の側端面に沿って配
されたライン光源と、該ライン光源を覆うべく配された
ホルダとよりなる面光源装置１において、上記ライン光
源を、上記拡散板側にずらして配設すると共に、上記導
光板の側端面をこれが上記ライン光源に対向する傾斜面
とした構成としたものである。According to a fifth aspect of the present invention, a light guide plate, a reflection plate and a diffusion plate sandwiching the light guide plate, a line light source arranged along a side end surface of the light guide plate, and a line light source arranged to cover the line light source. In the surface light source device 1 including a holder, the line light source is arranged so as to be shifted toward the diffusion plate side, and the side end surface of the light guide plate is an inclined surface facing the line light source. Is.
【００１４】[0014]
【作用】請求項１の透明樹脂製の拡散反射層パターン
は、表面全体が拡散作用を発揮し、白ペイントパターン
に比べて、拡散の程度を高くするように作用すると共
に、透明であり目立たない故に拡散板の光透過度が低く
て足りるように作用する。In the diffuse reflection layer pattern made of the transparent resin according to claim 1, the entire surface exhibits a diffusing action, acts to increase the degree of diffusion as compared with the white paint pattern, and is transparent and inconspicuous. Therefore, the light transmittance of the diffusion plate is low, and the diffusion plate works.
【００１５】請求項２の蛍光色素を含有させた構成は、
紫外線照射時に拡散反射層パターンを発光させるように
作用する。The structure containing the fluorescent dye according to claim 2 is
It acts so as to cause the diffuse reflection layer pattern to emit light when irradiated with ultraviolet rays.
【００１６】請求項３の構成の導光板は、従来の導光板
に比べて、より広く拡散させるように作用する。The light guide plate having the structure according to the third aspect of the invention functions to diffuse the light more widely than the conventional light guide plate.
【００１７】請求項４に記載した如く取り付けられたホ
ルダは、光が拡散板の側端面及び反射板の側端面を照射
することを制限するように作用する。The holder mounted as described in claim 4 acts so as to restrict light from irradiating the side end surface of the diffusion plate and the side end surface of the reflection plate.
【００１８】請求項５のライン光源をずらして配置し且
つ導光板の側端面とした構成は、光源から出て導光板内
へ入射する光の量を多くするように作用する。According to the fifth aspect of the invention, the line light sources are arranged in a staggered manner and are formed on the side end faces of the light guide plate so as to increase the amount of light emitted from the light source and entering the light guide plate.
【００１９】[0019]
【実施例】次に、本発明の一実施例になる面光源装置２
０について、図１を参照して説明する。Next, a surface light source device 2 according to an embodiment of the present invention will be described.
0 will be described with reference to FIG.
【００２０】図１中、図５に示す構成部分と対応する部
分には同一符号を付す。In FIG. 1, parts corresponding to those shown in FIG. 5 are designated by the same reference numerals.
【００２１】２１は導光板であり、アクリル樹脂製の導
光板本体２１Ａの背面２１Ａａに、図２及び図３に併せ
て示すように、正方形の透明拡散反射層パターン２２が
所定の配置パターンで形成してある。Reference numeral 21 denotes a light guide plate. As shown in FIG. 2 and FIG. 3, a square transparent diffuse reflection layer pattern 22 is formed in a predetermined arrangement pattern on a back surface 21Aa of a light guide plate body 21A made of acrylic resin. I am doing it.
【００２２】各パターン２２は、ライン光源としての冷
陰極管５が配される側端面２１Ａｃからの距離をｘとし
た場合に、一辺の長さｙが、次式 ｙ＝0.115 ×10-5ｘ3 ＋5.60×10-6ｘ2 ＋5.32×10-6ｘ＋0.3725 … に準拠するように定めてある。この配置パターンは従来
のと同じである。When the distance from the side end surface 21Ac on which the cold cathode fluorescent lamp 5 as the line light source is arranged is x, each pattern 22 has a side length y of the following equation y = 0.115 × 10 -5 x 3 + 5.60 are determined so as to conform to × 10 -6 x 2 + 5.32 × 10 -6 x + 0.3725 .... This arrangement pattern is the same as the conventional one.
【００２３】この透明拡散層パターン２２は、材料とし
て、アクリル樹脂に青色蛍光色素（例えば（ＢＢＯＴ）
を含有させたものを使用して、シルクスクリーン印刷に
よって形成してあり、表面２２ａは粗面である。The transparent diffusion layer pattern 22 is made of acrylic resin and a blue fluorescent dye (for example, (BBOT)) as a material.
The surface 22a is a rough surface.
【００２４】青色蛍光色素を含ませたのは、導光板２１
のパターン検査の便宜のためである。即ち、導光板２１
に紫外線を照射すると、パターン２２の部分だけが紫色
に発光し、パターン２２が正常に形成されているか否か
が検査できる。The light guide plate 21 contains the blue fluorescent dye.
This is for the convenience of pattern inspection. That is, the light guide plate 21
When the pattern 22 is irradiated with ultraviolet rays, only the part of the pattern 22 emits a purple color, and it can be inspected whether the pattern 22 is normally formed.
【００２５】また、導光板２１Ａの上記側端面２１Ａｃ
は、図１及び図３に示すように、光出射面２１Ａａを削
り込む方向の傾斜面としてある。Further, the side end surface 21Ac of the light guide plate 21A is formed.
As shown in FIGS. 1 and 3, is the inclined surface in the direction in which the light emitting surface 21Aa is cut.
【００２６】冷陰極管５は、図１に示すように、導光板
２１の厚さ方向中心２３に対して、光出射面（前面）２
１Ａｂ側に、即ち拡散板４Ｂ側にΔＺずらして配設して
ある。As shown in FIG. 1, the cold cathode tube 5 has a light emitting surface (front surface) 2 with respect to a center 23 in the thickness direction of the light guide plate 21.
They are arranged on the side of 1Ab, that is, on the side of diffusion plate 4B with a ΔZ shift.
【００２７】また、この冷陰極管５を囲むホルダ６Ｂ
は、一端６Ｂを導光板２１と拡散板４Ｂとの間に挟み込
まれて、且つ他端６Ａｂを導光板２１と反射板との間に
挟み込まれて設けてある。Further, a holder 6B surrounding the cold cathode tube 5
Has one end 6B sandwiched between the light guide plate 21 and the diffusion plate 4B, and the other end 6Ab sandwiched between the light guide plate 21 and the reflection plate.
【００２８】パターン２２は透明であるため、拡散板４
Ｂは、従来のように白色のペイントパターンをぼかす機
能は不要である。このため、拡散板４Ｂは、シリカ等の
拡散効果を有する無機物の含有量を、従来の場合よりも
少なくしてあり、製造し易い。Since the pattern 22 is transparent, the diffusion plate 4
B does not require the function of blurring the white paint pattern as in the conventional case. Therefore, the diffusion plate 4B has a smaller content of inorganic substances such as silica having a diffusion effect than in the conventional case, and is easy to manufacture.
【００２９】また、拡散板４Ｂの光透過度は、従来例に
おける拡散板４より高い。The light transmittance of the diffusion plate 4B is higher than that of the diffusion plate 4 in the conventional example.
【００３０】次に上記構成になる面光源装置２０の動作
についけ説明する。Next, the operation of the surface light source device 20 having the above structure will be described.
【００３１】Ｉ．導光板２１内への光の侵入 図１及び図３に示すように、冷陰極管５より発生した光
のうち、符号３０で示す光は、直接に傾斜側端面２１Ａ
ａを通って導光板２１内に入り込む。残りの光は、符号
３１で示すように、ホルダ６Ｂの反射面６Ｂｂで反射し
た後に、同じく傾斜側端面２１Ａａを通って導光板２１
内に入り込む。I. Light Penetration into Light Guide Plate 21 As shown in FIGS. 1 and 3, among the lights generated from the cold cathode tubes 5, the light indicated by reference numeral 30 is directly the end surface 21A on the inclined side.
It enters into the light guide plate 21 through a. The remaining light is reflected by the reflection surface 6Bb of the holder 6B and then passes through the inclined side end surface 21Aa, as shown by the reference numeral 31, and is similarly guided by the light guide plate 21.
Get inside.
【００３２】こゝで、ホルダ６Ｂａは、導光板２１を挟
んでいるため、従来において拡散板４Ｂ内にその側端面
から漏れ込んだり、反射板３の側端面で反射されたりし
て無駄となっていた光が無くなる。Since the holder 6Ba sandwiches the light guide plate 21, the holder 6Ba leaks into the diffuser plate 4B from the side end surface thereof or is reflected by the side end surface of the reflector plate 3 and is thus wasted. The light that was used disappears.
【００３３】また、側端面２１Ａａがずらして配した冷
陰極管５に対して略正対する位置関係となり、側端面２
１Ａａで反射する成分は僅かとなる。Further, the side end surface 21Aa is in a positional relationship where it is substantially directly opposed to the cold cathode tube 5 arranged in a shifted manner, and the side end surface 2
The component reflected by 1Aa is small.
【００３４】従って、冷陰極管５より発生した光は、そ
の殆んどが導光板２１内に侵入する。Therefore, most of the light generated from the cold cathode tube 5 enters the light guide plate 21.
【００３５】II．導光板２１の光出射面２１Ａｂよりの
光の出射 導光板２１内へ侵入した光のうち、透明拡散層パターン
２２に向う光３２は、図１、図３に示すように、導光板
本体２１Ａから出て、符号３３で示すように、透明拡散
層パターン２２内に入り込み、この透明拡散層パターン
２２の粗面状態の表面２２ａで符号３４で示すように乱
反射して拡散し、再び導光板本体２１Ａ内に入り、光出
射面２１Ａｂに向う。II. Emission of Light from Light Emitting Surface 21Ab of Light Guide Plate 21 Of the light that has entered the light guide plate 21, the light 32 that is directed toward the transparent diffusion layer pattern 22 is emitted from the light guide plate body 21A as shown in FIGS. As shown by the reference numeral 33, the transparent diffused layer pattern 22 enters the transparent diffused layer pattern 22, and the rough surface 22a of the transparent diffused layer pattern 22 diffuses and diffuses as indicated by the reference numeral 34, and again the light guide plate main body 21A. It goes inside and goes toward the light emitting surface 21Ab.
【００３６】散乱光３４は、拡散板４Ｂに入り、こゝ
で、符号３５で示すように更に拡散されて、面光源装置
２０の光出射面２０ａより出射する。The scattered light 34 enters the diffusion plate 4B, is further diffused as shown by reference numeral 35, and is emitted from the light emitting surface 20a of the surface light source device 20.
【００３７】また、符号３６で示すように、透明拡散層
パターン２２の無い部分に向う光は、反射板３で反射さ
れて、符号３６で示すように導光板本体２１Ａのうち冷
陰極管５に対して更に遠方に伝播し、冷陰極管５より遠
い透明拡散層パターンに入射し、前記と同様に拡散され
る。Further, as indicated by the reference numeral 36, the light directed to the portion where the transparent diffusion layer pattern 22 is not present is reflected by the reflection plate 3 and is reflected by the cold cathode tube 5 of the light guide plate main body 21A as indicated by the reference numeral 36. On the other hand, it propagates further away, enters the transparent diffusion layer pattern farther from the cold cathode fluorescent lamp 5, and is diffused in the same manner as described above.
【００３８】こゝで、各透明拡散層パターン２２につい
てみるに、その表面２２ａの全体が拡散させる機能をす
る。従って光を拡散させる作用は、従来の白色ペイント
の場合に比べて強い。Here, each transparent diffusion layer pattern 22 has a function of diffusing the entire surface 22a. Therefore, the action of diffusing light is stronger than that of the conventional white paint.
【００３９】またパターン２２の表面２２ａは全体的に
丸みを帯びており、拡散の方向も、従来の場合に比べて
より広がる。The surface 22a of the pattern 22 is rounded as a whole, and the direction of diffusion is wider than in the conventional case.
【００４０】III. 拡散板４Ｂよりの出射 導光板２１の光出射面２１Ａｂより出た光は、拡散板４
Ｂを、従来の場合に比べて、損失を抑えられて透過し、
面光源装置２０より出射する。III. Emission from Diffuser 4B The light emitted from the light exit surface 21Ab of the light guide plate 21 is diffused by the diffuser 4B.
B is transmitted with suppressed loss compared to the conventional case,
The light is emitted from the surface light source device 20.
【００４１】上記の面光源装置２０の輝度分布は、図４
中、線Ｉで示す如くになる。The brightness distribution of the surface light source device 20 is shown in FIG.
Middle, as shown by the line I.
【００４２】線Ｉを線IIと比較してみると、面光源装置
２０は、従来に比べて輝度が均一となっており、且つ輝
度が高いことが分かる。Comparing the line I with the line II, it can be seen that the surface light source device 20 has uniform brightness and higher brightness than the conventional one.
【００４３】これを数字で表わすと以下の如くになる。This can be expressed numerically as follows.
【００４４】輝度の最大値と最小値との比をみるに、線
IIにおいては７４％であったのに対し、線Ｉにおいては
８６％であった。The line between the maximum and minimum luminance values is
In line II it was 74%, whereas in line I it was 86%.
【００４５】また、光出射面２０ａのうちの４０個所を
選んで測定した結果、従来の場合の平均輝度は２８５ｎ
ｉｔであるのに対し、本実施例にあっては、３２１ｎｉ
ｔであり、従来に比べて１．１２倍明るい。こゝで、輝
度が均一であるのは、主に、透明拡散反射層パターン２
２に因る。輝度が高いのは、 ホルダ６Ａが導光板２１を挟んだ構造。As a result of selecting and measuring 40 points on the light emitting surface 20a, the average luminance in the conventional case is 285n.
In contrast to it, 321 ni in the present embodiment.
t, which is 1.12 times brighter than the conventional one. Here, the uniform brightness is mainly due to the transparent diffuse reflection layer pattern 2
Due to 2. The high brightness is due to the structure in which the holder 6A sandwiches the light guide plate 21.
【００４６】 冷陰極管５をずらした配置及び側端面
を傾斜面２１Ａｃとした構造。A structure in which the cold cathode tubes 5 are arranged in a staggered manner, and a side end surface is formed into an inclined surface 21Ac.
【００４７】 拡散板４Ｂの構造等に因る。This is due to the structure of the diffusion plate 4B and the like.
【００４８】また、透明拡散反射層パターン２２に代え
て半透明拡散反射層パターンを設けてもよい。Further, instead of the transparent diffuse reflection layer pattern 22, a semitransparent diffusion reflection layer pattern may be provided.
【００４９】[0049]
【発明の効果】以上説明した様に、請求項１の発明によ
れば、この導光板を組込むことにより、従来に比べて、
輝度のムラが少なく且つ輝度が高い面光源装置を実現出
来る。請求項２の発明によれば、拡散反射層パターンが
透明であるけれども、検査を確実に行うことが出来る。As described above, according to the first aspect of the present invention, by incorporating this light guide plate, compared with the conventional case,
It is possible to realize a surface light source device with little unevenness in brightness and high brightness. According to the second aspect of the invention, although the diffuse reflection layer pattern is transparent, the inspection can be surely performed.
【００５０】請求項３の発明によれば、従来のものに比
べて輝度のムラを少なく出来る。According to the third aspect of the present invention, it is possible to reduce the unevenness of the luminance as compared with the conventional one.
【００５１】請求項４の発明によれは、従来のものに比
べて輝度を上げることが出来る。According to the invention of claim 4, the brightness can be increased as compared with the conventional one.
【００５２】請求項５の発明によれば、従来のものに比
べて輝度を上げることが出来る。According to the invention of claim 5, the brightness can be increased as compared with the conventional one.
【図１】本発明の一実施例の面光源装置を示す図であ
る。FIG. 1 is a diagram showing a surface light source device according to an embodiment of the present invention.
【図２】図１中、導光板の底面図である。FIG. 2 is a bottom view of the light guide plate in FIG.
【図３】透明拡散反射層パターンの部分における光の拡
散を説明する図である。FIG. 3 is a diagram illustrating diffusion of light in a transparent diffuse reflection layer pattern portion.
【図４】図１の面光源装置の輝度分布を従来のものと併
せて示す図である。FIG. 4 is a diagram showing a luminance distribution of the surface light source device of FIG. 1 together with a conventional one.
【図５】従来の面光源装置の１例を示す図である。FIG. 5 is a diagram showing an example of a conventional surface light source device.
【図６】図５中、白色ペイント製の拡散反射層パターン
の部分における光の拡散を説明する図である。FIG. 6 is a diagram for explaining light diffusion in the portion of the diffuse reflection layer pattern made of white paint in FIG.
４Ｂ 拡散板 ５ 冷陰極管 ６Ｂ ホルダ ６Ｂｂ，６Ｂｃ 端部 ２０ 面光源装置 ２１ 導光板 ２１Ａ 導光板本体 ２１Ａａ 背面 ２１Ａｂ 光出射面（前面） ２１Ａｃ 傾斜側端面 ２２ 透明拡散反射層パターン ２２ａ 粗れた表面 ２３ 導光板の厚さ方向中心 4B Diffusion plate 5 Cold cathode tube 6B Holder 6Bb, 6Bc Edge part 20 Surface light source device 21 Light guide plate 21A Light guide plate body 21Aa Rear surface 21Ab Light emission surface (front surface) 21Ac Inclined end surface 22 Transparent diffuse reflection layer pattern 22a Rough surface 23 Center of thickness of light guide plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 戸松 正宏 神奈川県横浜市緑区川和町654番地 富士 通化成株式会社内 (72)発明者 海輪 和正 神奈川県横浜市緑区川和町654番地 富士 通化成株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masahiro Tomatsu 654 Kawawa-cho, Midori-ku, Yokohama-shi, Kanagawa Within Fujitsu Kasei (72) Inventor Kazumasa Kaiwa 654 Kawawa-cho, Midori-ku, Yokohama-shi, Kanagawa Within Fujitsu Kasei Co., Ltd.
Claims (5)
定のパターンで形成された拡散反射層パターンとよりな
り、背面側の反射板と前面側の拡散板とに挟まれ、側端
面から光を入射される導光板において、 上記拡散反射層パターンが、透明又は半透明の樹脂製の
拡散反射層パターン（２２）である構成としたことを特
徴とする導光板。1. A light guide plate main body and a diffuse reflection layer pattern formed on the back surface of the light guide plate main body in a predetermined pattern, and is sandwiched between a back side reflector plate and a front side diffuser plate to form a side end surface. The light guide plate to which light is incident from is characterized in that the diffuse reflection layer pattern is a diffuse reflection layer pattern (22) made of a transparent or semitransparent resin.
蛍光色素を含有した透明又は半透明の樹脂製の拡散反射
層パターンである構成としたことを特徴とする導光板。2. The diffuse reflection layer pattern according to claim 1,
A light guide plate having a structure of a diffuse reflection layer pattern made of a transparent or semitransparent resin containing a fluorescent dye.
の背面に透明もしくは半透明の樹脂により所定のパター
ンで形成された拡散反射層パターン（２２）とよりなる
導光板（２１）と、 該導光板本体の背面側に配された反射板（３）と、 該導光板本体の前面側に配された拡散板（４Ｂ）と、 上記導光板本体の側端面（２１Ａｃ）より光を入射させ
るライン光源（５）とよりなる構成としたことを特徴と
する面光源装置。3. A light guide plate (21) comprising a light guide plate body (21A) and a diffuse reflection layer pattern (22) formed on the back surface of the light guide plate body in a predetermined pattern by a transparent or semitransparent resin. , A light reflector plate (3) arranged on the back side of the light guide plate body, a diffusion plate (4B) arranged on the front side of the light guide plate body, and a side end surface (21Ac) of the light guide plate body. A surface light source device comprising a line light source (5) for incidence.
板（３）と拡散板（４Ｂ）と、該導光板の側端面に沿っ
て配されたライン光源（５）と、該ライン光源を覆うべ
く配されたホルダ（６Ｂ）とよりなる面光源装置１にお
いて、 該ホルダの端（６Ｂｂ，６Ｂｃ）を、夫々上記反射板
（３）と導光板（２１）との間及び上記拡散板（４Ｂ）
と導光板（２１）との間に挟み込んだ構成としたことを
特徴とする面光源装置。4. A light guide plate (21), a reflection plate (3) sandwiching the light guide plate, a diffusion plate (4B), a line light source (5) arranged along a side end surface of the light guide plate, and In a surface light source device 1 including a holder (6B) arranged to cover a line light source, an end (6Bb, 6Bc) of the holder is provided between the reflection plate (3) and the light guide plate (21) and the above. Diffuser (4B)
A surface light source device characterized by being sandwiched between a light guide plate (21) and a light guide plate (21).
板と拡散板（４Ｂ）と、該導光板の側端面に沿って配さ
れたライン光源（５）と、該ライン光源を覆うべく配さ
れたホルダ（６Ｂ）とよりなる面光源装置１において、 上記ライン光源（５）を、上記拡散板（４Ｂ）側にずら
して配設すると共に、 上記導光板の側端面（２１Ａｃ）をこれが上記ライン光
源に対向する傾斜面とした構成としたことを特徴とする
面光源装置。5. A light guide plate (21), a reflection plate and a diffusion plate (4B) sandwiching the light guide plate, a line light source (5) arranged along a side end face of the light guide plate, and the line light source. In a surface light source device 1 including a holder (6B) arranged to cover, the line light source (5) is arranged so as to be shifted toward the diffusion plate (4B) side, and a side end surface (21Ac) of the light guide plate is provided. The surface light source device is characterized in that this is an inclined surface facing the line light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15379192A JP3242696B2 (en) | 1992-06-12 | 1992-06-12 | Light guide plate and surface light source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15379192A JP3242696B2 (en) | 1992-06-12 | 1992-06-12 | Light guide plate and surface light source device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05341133A true JPH05341133A (en) | 1993-12-24 |
| JP3242696B2 JP3242696B2 (en) | 2001-12-25 |
Family
ID=15570218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15379192A Expired - Lifetime JP3242696B2 (en) | 1992-06-12 | 1992-06-12 | Light guide plate and surface light source device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3242696B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5157903B2 (en) * | 2006-06-20 | 2013-03-06 | 日本電気株式会社 | LIGHTING DEVICE, LIGHTING METHOD, AND DISPLAY DEVICE |
| CN104007503A (en) * | 2013-02-25 | 2014-08-27 | 惠和株式会社 | Light guide film, ultrathin type liquid crystal backlight unit and portable computer |
| JP2016099488A (en) * | 2014-11-21 | 2016-05-30 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus and light guide member |
-
1992
- 1992-06-12 JP JP15379192A patent/JP3242696B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5157903B2 (en) * | 2006-06-20 | 2013-03-06 | 日本電気株式会社 | LIGHTING DEVICE, LIGHTING METHOD, AND DISPLAY DEVICE |
| CN104007503A (en) * | 2013-02-25 | 2014-08-27 | 惠和株式会社 | Light guide film, ultrathin type liquid crystal backlight unit and portable computer |
| JP2016099488A (en) * | 2014-11-21 | 2016-05-30 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus and light guide member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3242696B2 (en) | 2001-12-25 |
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