JPH08146231A - Backlight device - Google Patents
Backlight deviceInfo
- Publication number
- JPH08146231A JPH08146231A JP6312621A JP31262194A JPH08146231A JP H08146231 A JPH08146231 A JP H08146231A JP 6312621 A JP6312621 A JP 6312621A JP 31262194 A JP31262194 A JP 31262194A JP H08146231 A JPH08146231 A JP H08146231A
- Authority
- JP
- Japan
- Prior art keywords
- light
- acrylic material
- guide plate
- light guide
- diffusing
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、液晶画面に用いるエ
ッジライト方式のバックライト装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an edge light type backlight device used for a liquid crystal screen.
【０００２】[0002]
【従来の技術】図３は、従来のエッジライト方式のバッ
クライト装置の要部断面図である。このバックライト装
置は、アクリル材の導光板１０１を備えている。この導
光板１０１の幅方向の一端部側には、蛍光管１０２が設
けられている。この蛍光管１０２は、導光板１０１の端
部に沿って位置し、その軸方向を導光板１０１の幅方向
としている。蛍光管１０２の周囲には、この蛍光管１０
２から照射される光を導光板１０１側に反射する反射シ
ート１０３が形成されている。2. Description of the Related Art FIG. 3 is a sectional view of a main part of a conventional edge light type backlight device. This backlight device includes a light guide plate 101 made of an acrylic material. A fluorescent tube 102 is provided on one end side of the light guide plate 101 in the width direction. The fluorescent tube 102 is located along the end of the light guide plate 101, and its axial direction is the width direction of the light guide plate 101. The fluorescent tube 10 is provided around the fluorescent tube 102.
A reflection sheet 103 that reflects the light emitted from the second side toward the light guide plate 101 side is formed.
【０００３】導光板１０１の一方の面１０４には、拡散
印刷１０５が施され、さらに導光板１０１の一方の面１
０７側から光がぬけるのを防止する反射シート１０６が
貼り付けてある。蛍光管１０２から導光板１０１に照射
された光が拡散印刷１０５にあたると拡散作用を受け、
光が乱反射し、図３中の矢示Ａのように、導光板１０１
の一方の面１０７側（図示しない液晶画面側）に光が立
ち上がってくる。拡散印刷１０５は、導光板１０１の一
方の面１０４の、蛍光管１０２側端部から他端部に向け
て、漸次疎から密となるようにグラデーションがかけら
れている。これにより、導光板１０１の一方の面１０７
から照射される光が、蛍光管１０２に近い側では強く、
遠い側では弱くなるのを防止し、導光板１０１の一方の
面１０７全体から均一な光が図示しない液晶画面に照射
されるようにしている。Diffusion printing 105 is applied to one surface 104 of the light guide plate 101, and one surface 1 of the light guide plate 101 is further provided.
A reflection sheet 106 is attached to prevent light from passing through from the 07 side. When the light emitted from the fluorescent tube 102 to the light guide plate 101 hits the diffusion print 105, the light is diffused,
Light is diffusely reflected, and as shown by an arrow A in FIG.
Light rises on one surface 107 side (a liquid crystal screen side (not shown)). The diffusion printing 105 is gradation from one end 104 of the light guide plate 101 toward the other end toward the fluorescent tube 102 so as to gradually become dense and dense. Thereby, the one surface 107 of the light guide plate 101
The light emitted from is strong on the side close to the fluorescent tube 102,
On the far side, weakening is prevented, and uniform light is applied to the liquid crystal screen (not shown) from the entire one surface 107 of the light guide plate 101.
【０００４】しかしながら、蛍光管１０２から図３中の
矢示Ｂの経路で入射した光は、拡散印刷１０５になかな
か当たらないため、導光板１０１内で反射を繰り返し、
次第に減衰してしまう。すなわち、導光板１０１内から
出ることの出来ない光が生じ、蛍光管１０２からの光を
もれなく有効に活用することが出来ない。However, the light incident from the fluorescent tube 102 along the path indicated by the arrow B in FIG. 3 hardly hits the diffusion printing 105, so that the light is repeatedly reflected in the light guide plate 101.
It gradually diminishes. That is, the light that cannot be emitted from the light guide plate 101 is generated, and the light from the fluorescent tube 102 cannot be effectively used without leakage.
【０００５】この点を解決せんとして提案されたのが、
図４に要部断面図で示すバックライト装置である。図４
において、図３と同一符号の部材は、図３を参照して説
明した前述の従来のバックライト装置と同様の部材であ
るため、詳細な説明は省略する。What was proposed as a solution to this point is
It is a backlight device shown in FIG. FIG.
3, the members having the same reference numerals as those in FIG. 3 are the same members as those of the above-described conventional backlight device described with reference to FIG. 3, and thus detailed description thereof will be omitted.
【０００６】このバックライト装置が、図３のものと相
違する点は、拡散印刷１０５が施されず、また、アクリ
ル材の導光板１０１内全体に細かな拡散材１０８が均等
な割合で混入されている点である。蛍光管１０２から発
した光は、拡散材１０８にあたって乱反射され、導光板
１０１の一方の面１０７側に光が立ち上がってくる。こ
のバックライト装置によれば、図４に示す矢示Ｃのよう
な光も拡散材１０８にあたり乱反射するので、導光板１
０１内から出ることのできない光が生じ、光をもれなく
有効に活用することができる。This backlight device is different from that of FIG. 3 in that diffusion printing 105 is not applied, and fine diffusing material 108 is mixed in the entire light guide plate 101 made of acrylic material at an equal ratio. That is the point. The light emitted from the fluorescent tube 102 is diffusely reflected by the diffusing material 108, and the light rises to the one surface 107 side of the light guide plate 101. According to this backlight device, light such as the arrow C shown in FIG.
Light that cannot be emitted from 01 is generated, and the light can be effectively used without omission.
【０００７】[0007]
【発明が解決しようとする課題】しかし、図３に示すバ
ックライト装置では、拡散材１０８が導光板１０１内に
均等にちりばめられており、光が導光板１０１の一方の
面１０７全体から均一には出ずに、蛍光管１０２に近い
部位からの光が強く、遠い部位からの光が弱くなってし
まう。However, in the backlight device shown in FIG. 3, the diffusing material 108 is evenly studded in the light guide plate 101, and the light is evenly distributed from the entire one surface 107 of the light guide plate 101. The light from the portion near the fluorescent tube 102 is strong and the light from the far portion is weak.
【０００８】かかる問題は、導光板１０１内の拡散材１
０８の密度を、蛍光管１０２に近い側では大きく、遠い
側では小さくして、導光板１０１を製造できれば解消で
きるが、このように拡散材１０８の密度を部位により変
動させて導光板１０１を製造することはきわめて困難で
ある。This problem is caused by the diffusing material 1 in the light guide plate 101.
The density of 08 can be eliminated if the light guide plate 101 can be manufactured by increasing the density on the side closer to the fluorescent tube 102 and decreasing it on the side farther from the fluorescent tube 102. However, the light guide plate 101 is manufactured by varying the density of the diffusing material 108 depending on the region. It is extremely difficult to do.
【０００９】この発明は、蛍光管などの光源からの光を
もれなく有効に活用することができ、かつ、導光板から
均等な輝度分布で光を放射することを可能としつつも、
製造が容易である液晶画面のバックライト装置を提供す
ることを目的とする。According to the present invention, light from a light source such as a fluorescent tube can be effectively utilized without omission, and light can be emitted from the light guide plate with a uniform luminance distribution.
An object of the present invention is to provide a liquid crystal screen backlight device that is easy to manufacture.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するた
め、請求項１項記載の発明は、受けた光を拡散させる拡
散材が全体に略均等の割合で混入されている第１のアク
リル材を一方の面側とし、少なくとも前記拡散材の混入
率が前記第１のアクリル材より少ない第２のアクリル材
を他方の面側として二色成形されている導光板を有し、
この導光板の幅方向端部側には、この導光板に光を照射
する光源が形成されている液晶画面のバックライト装置
とした。In order to solve the above-mentioned problems, the invention according to claim 1 is a first acrylic material in which a diffusing material for diffusing received light is mixed in a substantially uniform ratio in its entirety. On one surface side, and a light guide plate that is two-color molded with at least the second acrylic material having a mixing ratio of the diffusing material smaller than that of the first acrylic material on the other surface side,
A backlight device for a liquid crystal screen is provided in which a light source for irradiating the light guide plate with light is formed on the end portion in the width direction of the light guide plate.
【００１１】また、請求項２項記載の発明は、請求項１
項記載の液晶画面のバックライト装置において、前記導
光板は、その幅方向の前記光源側端部から他端部に向け
て、前記第１のアクリル材は漸次厚く形成され、前記第
２のアクリル材は漸次薄く形成されているものとした。The invention according to claim 2 is the same as claim 1.
In the backlight device for a liquid crystal screen as described in the item 1, in the light guide plate, the first acrylic material is gradually thickened from the end on the light source side in the width direction toward the other end, and the second acrylic is formed. The material was assumed to be gradually thinner.
【００１２】[0012]
【作用】請求項１項記載の発明によれば、第１のアクリ
ル材は第２のアクリル材より拡散材の混入率が高いの
で、第１のアクリル材に入射した光源からの光は強く拡
散されるが、第２のアクリル材に入射した光源からの光
は弱く拡散されるから、導光板の各部位において、導光
板の各部位ごとに第１のアクリル材、第２のアクリル材
の厚さを各種各様に調整することにより、第１のアクリ
ル材の厚い部位では第１のアクリル材側から照射される
光の輝度を大きく、第１のアクリル材の薄い部位では小
さくすることができる。According to the invention described in claim 1, since the first acrylic material has a higher mixing ratio of the diffusing material than the second acrylic material, the light from the light source incident on the first acrylic material is strongly diffused. However, since the light from the light source that has entered the second acrylic material is weakly diffused, the thickness of the first acrylic material and the thickness of the second acrylic material are different for each part of the light guide plate at each part of the light guide plate. The brightness of the light emitted from the first acrylic material side can be increased in the thick portion of the first acrylic material and can be decreased in the thin portion of the first acrylic material by adjusting the thickness in various ways. .
【００１３】また、光の拡散のためには拡散印刷を用い
たものではなく、拡散材を導光板中に混入させて行って
いるので、導光板内から出ることのできない光が生じる
ことがなく、光源からの光をもれなく有効に活用するこ
とができる。また、光の拡散のためには拡散印刷を用い
ず、拡散材を導光板中に混入させて行っているので、導
光板内から出ることのできない光が生じることがない。Further, since diffusion printing is not used for diffusing light, and a diffusing material is mixed in the light guide plate, light that cannot be emitted from the light guide plate is not generated. , The light from the light source can be effectively utilized without omission. Further, since diffusion printing is not used for diffusing light and a diffusing material is mixed in the light guide plate, light that cannot be emitted from the light guide plate is not generated.
【００１４】さらに、導光板は、第１のアクリル材につ
いては拡散材を全体に略均等の割合で混入させ、拡散材
の含まれない第２のアクリル材と二色成形により成形さ
れ、拡散材の密度を部位ごとに変化させて製造する必要
はない。Further, the light guide plate is formed by mixing the diffusing material in the first acrylic material in a substantially uniform ratio to the whole and by molding with the second acrylic material containing no diffusing material by two-color molding. It is not necessary to manufacture by changing the density of each part.
【００１５】請求項２項に記載の発明によれば、導光板
は、その幅方向の前記光源側端部から他端部に向けて、
第１のアクリル材は漸次厚く形成され、第２のアクリル
材は漸次薄く形成されているから、光源から照射され、
導光板内を通る光は、第１のアクリル材側の面より第２
のアクリル材側の面に近い位置を通るものほど、光源よ
り遠い位置において拡散材により拡散されることとな
る。According to the second aspect of the present invention, the light guide plate extends from the end on the light source side in the width direction toward the other end.
Since the first acrylic material is gradually thicker and the second acrylic material is thinner, it is irradiated by the light source,
The light passing through the inside of the light guide plate is second from the surface on the first acrylic material side.
The closer to the surface on the acrylic material side, the more diffused the light is at the position farther from the light source.
【００１６】また、請求項１項の発明と同様、導光板内
から出ることのできない光が生じることがなく、拡散材
の密度を部位ごとに変化させて製造する必要もない。Further, similarly to the first aspect of the present invention, light that cannot be emitted from the light guide plate is not generated, and it is not necessary to manufacture by changing the density of the diffusing material for each part.
【００１７】[0017]
【実施例】以下では、この発明の一実施例を図面を参照
しつつ説明する。図２は、この発明の一実施例である液
晶画面のバックライト装置１の分解斜視図であり、図１
は、同要部断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 is an exploded perspective view of a backlight device 1 for a liquid crystal screen according to an embodiment of the present invention.
FIG. 3 is a sectional view of the same main part.
【００１８】この実施例の液晶画面のバックライト装置
１は、アクリル材の導光板２を備えている。この導光板
２は矩形状で、一方の面２４側が、受けた光を拡散させ
る細かな拡散材２３が全体に均等の割合で混入されてい
る第１のアクリル材２１で形成されている。また、他方
の面２５側は、拡散材２３が混入されていない第２のア
クリル材２２で形成されている。この導光板２は、その
一方の端縁２６側から他方の端縁２７側に向けて、第１
のアクリル材２１は漸次厚く、第２のアクリル材２２は
漸次薄く、第１のアクリル材２１と第２のアクリル材２
２の二色成形により形成されている。The liquid crystal screen backlight device 1 of this embodiment includes a light guide plate 2 made of an acrylic material. The light guide plate 2 has a rectangular shape, and one surface 24 side thereof is formed of a first acrylic material 21 in which a fine diffusing material 23 for diffusing received light is mixed at a uniform rate. The other surface 25 side is formed of the second acrylic material 22 in which the diffusing material 23 is not mixed. The light guide plate 2 has a first edge 26 side toward the other edge 27 side.
Of the first acrylic material 21 and the second acrylic material 2 are gradually thicker and the second acrylic material 22 is gradually thinner.
It is formed by two-color molding of No. 2.
【００１９】符号３は各部材が収納されるケースであ
る。ケース３の底部３１には、光を反射する反射シート
４が収納され、その上に、導光板２が、端縁２６側をケ
ース３の蛍光管収納部３２側とし、第１のアクリル材２
１側の面２４を反射シート４側にして収納される。導光
板２の端縁２７には、光を反射する反射シート５が貼ら
れる。導光板２の第２のアクリル材２２側の面２５の上
には光を拡散させて平行光にする拡散シート６が収納さ
れる。Reference numeral 3 is a case in which each member is stored. A reflection sheet 4 that reflects light is housed in the bottom 31 of the case 3, and the light guide plate 2 has the edge 26 side thereof as the fluorescent tube housing 32 side of the case 3 and the first acrylic material 2 is provided thereon.
The surface 24 on the first side is stored with the reflection sheet 4 side. A reflection sheet 5 that reflects light is attached to the edge 27 of the light guide plate 2. On the surface 25 of the light guide plate 2 on the side of the second acrylic material 22, a diffusion sheet 6 for diffusing light into parallel light is stored.
【００２０】蛍光管７は、その軸方向の両端部を、それ
ぞれ蛍光灯用ホルダ８で支持されて蛍光管収納部３２に
収納される。これにより、蛍光管７は、導光板２の面２
４、２５の方向を軸方向とし、端縁２６に沿って配置さ
れる。この蛍光管７の周囲は蛍光管用反射シート９で覆
われる。蛍光管用反射シート９は、反射シートを略Ｕ字
形に折り曲げたもので、一端は導光板２の面２４の端縁
２６側に、他端は面２５の端縁２６側に、それぞれ固定
する。Both ends of the fluorescent tube 7 in the axial direction are supported by fluorescent lamp holders 8 and housed in a fluorescent tube housing portion 32. As a result, the fluorescent tube 7 is attached to the surface 2 of the light guide plate 2.
It is arranged along the edge 26 with the directions of 4 and 25 as the axial direction. The periphery of the fluorescent tube 7 is covered with a reflective sheet 9 for fluorescent tube. The reflection sheet 9 for a fluorescent tube is formed by bending a reflection sheet into a substantially U shape, and has one end fixed to the edge 26 side of the surface 24 of the light guide plate 2 and the other end fixed to the edge 26 side of the surface 25.
【００２１】この実施例の構成によれば、蛍光管７から
発する光は、蛍光管用反射シート９により反射されて、
導光板２の端部２６から、もれなく入射する。導光板２
は、その端縁部２６から端縁部２７に向けて、第１のア
クリル材２１は漸次厚く形成され、第２のアクリル材２
２は漸次薄く形成されているから、蛍光管７から照射さ
れ、導光板２を通る光は、第１のアクリル材２１側の面
２４より第２のアクリル材２２側の面２５により近い位
置を通るものほど、蛍光管７より遠い位置で拡散材２３
により拡散され、第２のアクリル材２２側の面２５全体
から均等な輝度の光を、図１中矢示する液晶画面（図示
せず）方向に照射することが出来る。According to the structure of this embodiment, the light emitted from the fluorescent tube 7 is reflected by the fluorescent tube reflection sheet 9,
The light is incident from the end 26 of the light guide plate 2 without leakage. Light guide plate 2
The first acrylic material 21 is gradually formed thicker from the end edge portion 26 toward the end edge portion 27.
Since 2 is gradually thinned, the light emitted from the fluorescent tube 7 and passing through the light guide plate 2 is positioned closer to the surface 25 on the second acrylic material 22 side than the surface 24 on the first acrylic material 21 side. The farther it passes, the farther the fluorescent tube 7 is from the diffusing material 23.
The light having a uniform brightness can be emitted from the entire surface 25 on the second acrylic material 22 side in the direction of the liquid crystal screen (not shown) shown by the arrow in FIG.
【００２２】なお、端縁部２７よりもれる光は、反射シ
ート５に反射して、再度、導光板２に入射し、導光板２
の第１のアクリル材２１側の面２４からもれる光は、反
射シート４に反射して、再度、導光板２に入射する。The light leaking from the edge 27 is reflected by the reflection sheet 5 and again enters the light guide plate 2, and the light guide plate 2
The light leaked from the surface 24 on the side of the first acrylic material 21 is reflected by the reflection sheet 4 and enters the light guide plate 2 again.
【００２３】また、蛍光管７からの光の拡散のためには
拡散印刷を用いず、拡散材２３を導光板２中に混入させ
て行っているので、導光板２内から出ることのできない
光が生じることがなく、蛍光管７からの光をもれなく有
効に活用することができる。Further, since diffusion printing is not used for diffusing the light from the fluorescent tube 7 and the diffusing material 23 is mixed in the light guide plate 2, the light which cannot be emitted from the inside of the light guide plate 2 is used. Is not generated, and the light from the fluorescent tube 7 can be effectively utilized without omission.
【００２４】さらに、導光板２は、第１のアクリル材２
１については、拡散材２３を全体に略均等の割合で混入
させ、拡散材２３の含まれない第２のアクリル材２２と
二色成形により形成されており、拡散材２３の密度を部
位ごとに変化させて製造する必要はないので、蛍光管７
からの光をもれなく有効に活用することができ、かつ、
導光板２の第２のアクリル材２２側の面２５全体から均
等な輝度分布で光を放射することを可能としつつも、製
造が容易である。Further, the light guide plate 2 is made of the first acrylic material 2
Regarding No. 1, the diffusing material 23 is mixed into the whole at a substantially equal ratio, and is formed by two-color molding with the second acrylic material 22 that does not include the diffusing material 23. Since it is not necessary to change the manufacturing process, the fluorescent tube 7
You can use the light from all of them effectively, and
Although it is possible to radiate light from the entire surface 25 of the light guide plate 2 on the side of the second acrylic material 22 with a uniform luminance distribution, it is easy to manufacture.
【００２５】なお、第２のアクリル材２２には、第１の
アクリル材２１より少ない混入率で全体に均等に拡散材
２３を混入させるように構成してもよく、上記実施例と
同様の効果を奏することができる。The second acrylic material 22 may be configured so that the diffusing material 23 is uniformly mixed throughout the second acrylic material 22 at a mixing ratio lower than that of the first acrylic material 21, and the same effect as that of the above embodiment. Can be played.
【００２６】[0026]
【発明の効果】請求項１項記載の発明によれば、第１の
アクリル材は第２のアクリル材より拡散材の混入率が高
いので、第１のアクリル材に入射した光源からの光は強
く拡散されるが、第２のアクリル材に入射した光源から
の光は弱く拡散されるから、導光板の各部位において、
導光板の各部位ごとに第１のアクリル材、第２のアクリ
ル材の厚さを各種各様に調整することにより、第１のア
クリル材の厚い部位では第１のアクリル材側から照射さ
れる光の輝度を大きく、第１のアクリル材の薄い部位で
は小さくすることができるので、導光板の大きさ、形
状、光源からの光量など、個々のバックライト装置の条
件に応じて、導光板の各部位ごとに第１のアクリル材、
第２のアクリル材の厚さを各種各様に調整することで、
導光板の第２のアクリル材側の面全体から均等な輝度の
光を照射することが出来る。According to the invention described in claim 1, since the first acrylic material has a higher mixing ratio of the diffusing material than the second acrylic material, the light from the light source incident on the first acrylic material is Although strongly diffused, the light from the light source incident on the second acrylic material is weakly diffused, so that at each part of the light guide plate,
By adjusting the thicknesses of the first acrylic material and the second acrylic material in various ways for each part of the light guide plate, the thick part of the first acrylic material is irradiated from the first acrylic material side. Since the brightness of the light can be increased and the light can be decreased in the thin portion of the first acrylic material, the light guide plate can be adjusted according to the conditions of individual backlight devices such as the size and shape of the light guide plate and the amount of light from the light source. The first acrylic material for each part,
By adjusting the thickness of the second acrylic material in various ways,
It is possible to irradiate light of uniform brightness from the entire surface of the light guide plate on the second acrylic material side.
【００２７】また、光の拡散のためには拡散印刷を用い
たものではなく、拡散材を導光板中に混入させて行って
いるので、導光板内から出ることのできない光が生じる
ことがなく、光源からの光をもれなく有効に活用するこ
とができる。Further, since diffusion printing is not used for diffusing light, and a diffusing material is mixed in the light guide plate, light that cannot be emitted from the light guide plate is not generated. , The light from the light source can be effectively utilized without omission.
【００２８】さらに、導光板は、第１のアクリル材につ
いては拡散材を全体に略均等の割合で混入させ、拡散材
の含まれない第２のアクリル材と二色成形により成形さ
れ、拡散材の密度を部位ごとに変化させて製造する必要
はないので、光源からの光をもれなく有効に活用するこ
とができ、かつ、導光板から均等な輝度分布で光を放射
することを可能としつつも、製造が容易である。Further, the light guide plate is formed by two-color molding with the second acrylic material that does not contain the diffusing material by mixing the diffusing material in the whole of the first acrylic material in a substantially equal ratio. Since it is not necessary to manufacture by changing the density of each part, it is possible to effectively use the light from the light source without fail, and it is possible to radiate the light with a uniform brightness distribution from the light guide plate. , Easy to manufacture.
【００２９】請求項２項に記載の発明によれば、導光板
は、その幅方向の前記光源側端部から他端部に向けて、
第１のアクリル材は漸次厚く形成され、第２のアクリル
材は漸次薄く形成されているから、光源から照射され、
導光板内を通る光は、第１のアクリル材側の面より第２
のアクリル材側の面に近い位置を通るものほど、光源よ
り遠い位置において拡散材により拡散されることとなる
から、第２のアクリル材側の面全体から均等な輝度の光
を照射することが出来る。According to the second aspect of the present invention, the light guide plate extends from the end on the light source side in the width direction toward the other end.
Since the first acrylic material is gradually thicker and the second acrylic material is thinner, it is irradiated by the light source,
The light passing through the inside of the light guide plate is second from the surface on the first acrylic material side.
The light passing through a position closer to the acrylic material side surface will be diffused by the diffusing material at a position farther from the light source. Therefore, it is possible to irradiate light of uniform brightness from the entire second acrylic material side surface. I can.
【００３０】また、請求項１項の発明と同様、導光板内
から出ることのできない光が生じることがないので、光
源からの光をもれなく有効に活用することができ、ま
た、拡散材の密度を部位ごとに変化させて製造する必要
もないので、製造も容易である。Further, as in the first aspect of the invention, since the light that cannot be emitted from the light guide plate is not generated, the light from the light source can be effectively utilized without omission, and the density of the diffusing material can be increased. Since it is not necessary to manufacture by changing each part, it is easy to manufacture.
【図１】この発明の一実施例である液晶画面のバックラ
イト装置の要部拡大断面図である。FIG. 1 is an enlarged cross-sectional view of a main part of a liquid crystal screen backlight device according to an embodiment of the present invention.
【図２】この発明の一実施例である液晶画面のバックラ
イト装置の分解斜視図である。FIG. 2 is an exploded perspective view of a liquid crystal screen backlight device according to an embodiment of the present invention.
【図３】従来の液晶画面のバックライト装置の要部拡大
断面図である。FIG. 3 is an enlarged sectional view of a main part of a conventional backlight device for a liquid crystal screen.
【図４】従来の液晶画面のバックライト装置の要部拡大
断面図である。FIG. 4 is an enlarged cross-sectional view of a main part of a conventional backlight device for a liquid crystal screen.
１ 液晶画面のバックライト装置 ２ 導光板 ７ 蛍光管 ２１ 第１のアクリル材 ２２ 第２のアクリル材 ２３ 拡散材 ２４ 第１のアクリル材側の面 ２５ 第２のアクリル材側の面 1 Backlight Device of Liquid Crystal Screen 2 Light Guide Plate 7 Fluorescent Tube 21 First Acrylic Material 22 Second Acrylic Material 23 Diffusing Material 24 Surface of First Acrylic Material Side 25 Surface of Second Acrylic Material Side
Claims (2)
均等の割合で混入されている第１のアクリル材を一方の
面側とし、少なくとも前記拡散材の混入率が前記第１の
アクリル材より少ない第２のアクリル材を他方の面側と
して二色成形されている導光板を有し、この導光板の幅
方向端部側には、この導光板に光を照射する光源が形成
されている液晶画面のバックライト装置。1. A first acrylic material in which a diffusing material for diffusing received light is mixed in a substantially uniform ratio to the whole is one surface side, and at least the mixing ratio of the diffusing material is the first acrylic material. A light guide plate that is two-color molded with the second acrylic material, which is less than the material, as the other surface side, and a light source that irradiates the light guide plate with light is formed on the end portion in the width direction of the light guide plate. LCD screen backlight device.
端部から他端部に向けて、前記第１のアクリル材は漸次
厚く形成され、前記第２のアクリル材は漸次薄く形成さ
れている請求項１項記載の液晶画面のバックライト装
置。2. The light guide plate is formed such that the first acrylic material is gradually thickened and the second acrylic material is gradually thinned from the light source side end portion in the width direction toward the other end portion. The backlight device for a liquid crystal screen according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6312621A JPH08146231A (en) | 1994-11-21 | 1994-11-21 | Backlight device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6312621A JPH08146231A (en) | 1994-11-21 | 1994-11-21 | Backlight device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08146231A true JPH08146231A (en) | 1996-06-07 |
Family
ID=18031410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6312621A Pending JPH08146231A (en) | 1994-11-21 | 1994-11-21 | Backlight device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08146231A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0924549A1 (en) * | 1997-12-17 | 1999-06-23 | Minebea Co.,Ltd. | Transparent and spread illuminating apparatus |
| WO2002014740A1 (en) * | 2000-07-31 | 2002-02-21 | Matsushita Electric Industrial Co., Ltd. | Illuminator, image display, liquid crystal monitor, liquid crystal television, liquid crystal information terminal, and method for producing light guide plate |
| JP2002208307A (en) * | 2000-07-31 | 2002-07-26 | Matsushita Electric Ind Co Ltd | Manufacturing method of illumination device, image display device, liquid crystal monitor, liquid crystal tv, liquid crystal information terminal and light guide plate |
| JP2006179453A (en) * | 2004-11-26 | 2006-07-06 | Asahi Kasei Chemicals Corp | Display light |
| KR100611552B1 (en) * | 1999-01-13 | 2006-08-10 | 삼성전자주식회사 | Backlight unit for liquid crystal display device |
| WO2008047501A1 (en) * | 2006-10-20 | 2008-04-24 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display |
| CN100405170C (en) * | 2003-04-01 | 2008-07-23 | 鸿富锦精密工业（深圳）有限公司 | Direct down type poor light module and its diffusion plate |
| JP2009117357A (en) * | 2007-10-19 | 2009-05-28 | Fujifilm Corp | Light guide plate |
| JP2010097894A (en) * | 2008-10-20 | 2010-04-30 | Fujifilm Corp | Light guide plate unit and liquid crystal display device |
| CN102854561A (en) * | 2012-09-14 | 2013-01-02 | 京东方科技集团股份有限公司 | Light guide plate and preparation and application thereof |
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| US6168281B1 (en) | 1997-12-17 | 2001-01-02 | Minebea Co., Ltd. | Transparent and spread illuminating apparatus |
| EP0924549A1 (en) * | 1997-12-17 | 1999-06-23 | Minebea Co.,Ltd. | Transparent and spread illuminating apparatus |
| KR100611552B1 (en) * | 1999-01-13 | 2006-08-10 | 삼성전자주식회사 | Backlight unit for liquid crystal display device |
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| JP2006179453A (en) * | 2004-11-26 | 2006-07-06 | Asahi Kasei Chemicals Corp | Display light |
| WO2008047501A1 (en) * | 2006-10-20 | 2008-04-24 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display |
| US8203670B2 (en) | 2006-10-20 | 2012-06-19 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display including diffusion unit and lenticular lens layer |
| JP2009117357A (en) * | 2007-10-19 | 2009-05-28 | Fujifilm Corp | Light guide plate |
| JP2010097894A (en) * | 2008-10-20 | 2010-04-30 | Fujifilm Corp | Light guide plate unit and liquid crystal display device |
| CN102854561A (en) * | 2012-09-14 | 2013-01-02 | 京东方科技集团股份有限公司 | Light guide plate and preparation and application thereof |
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