JPH0519254A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH0519254A JPH0519254A JP3168020A JP16802091A JPH0519254A JP H0519254 A JPH0519254 A JP H0519254A JP 3168020 A JP3168020 A JP 3168020A JP 16802091 A JP16802091 A JP 16802091A JP H0519254 A JPH0519254 A JP H0519254A
- Authority
- JP
- Japan
- Prior art keywords
- guide plate
- light guide
- liquid crystal
- crystal display
- backlight
- 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)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、管状のバックライトと
導光板を有する液晶表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device having a tubular backlight and a light guide plate.
【０００２】[0002]
【従来の技術】液晶表示装置は、フレームと、２枚の上
下透明ガラス基板とその間に封入された液晶等で構成さ
れた液晶表示素子と、この液晶表示素子とほぼ同一の大
きさで、該液晶表示素子の下に重ねて配置された導光板
と、この導光板の少なくとも１辺側に配置された管状の
バックライトとを有する。導光板は、該導光板の有効表
示領域全体にまんべんなくバックライトの光を導くため
のものである。2. Description of the Related Art A liquid crystal display device has a frame, two upper and lower transparent glass substrates and a liquid crystal display element composed of liquid crystal and the like enclosed between them. The liquid crystal display device includes a light guide plate that is arranged below the liquid crystal display device and a tubular backlight that is arranged on at least one side of the light guide plate. The light guide plate is for guiding the light of the backlight evenly over the entire effective display area of the light guide plate.
【０００３】このようなバックライトと導光板を有する
液晶表示装置は、例えば、特開平１−９００８５号公報
に記載されている。A liquid crystal display device having such a backlight and a light guide plate is described in, for example, Japanese Patent Laid-Open No. 1-90085.
【０００４】[0004]
【発明が解決しようとする課題】上記のような従来の液
晶表示装置では、導光板をフレームに取り付けるための
取付穴が、導光板への入光の妨げとなる位置、すなわ
ち、バックライトの発光領域（ＣＦＬのソケット取付部
を除く光が発せられる領域）の内側に設けられていたた
め、導光板の輝度が低下し、かつ輝度むらが増大する問
題があった。In the conventional liquid crystal display device as described above, the mounting hole for mounting the light guide plate to the frame prevents light from entering the light guide plate, that is, the light emission of the backlight. Since the light guide plate is provided inside the area (area where light is emitted excluding the socket mounting portion of the CFL), there is a problem that the brightness of the light guide plate is reduced and the uneven brightness is increased.
【０００５】本発明の目的は、導光板の輝度を向上し、
輝度むらを改善することができ、従って、表示品質を向
上できる液晶表示装置を提供することにある。An object of the present invention is to improve the brightness of a light guide plate,
An object of the present invention is to provide a liquid crystal display device capable of improving unevenness in brightness and thus improving display quality.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明では、導光板の両端部にバックライトの長
軸方向に出っ張る出っ張りを設け、この出っ張りに取付
穴を上記バックライトの発光領域の外側に存在するよう
に設けたことを特徴とする。In order to solve the above problems, according to the present invention, both ends of the light guide plate are provided with protrusions protruding in the longitudinal direction of the backlight, and mounting holes are provided in the protrusions of the backlight. It is characterized in that it is provided outside the light emitting region.
【０００７】[0007]
【作用】本発明では、従来、導光板における光の通り道
にあった取付穴を無くし、取付穴を入光の妨げとならな
い位置に設置したので、導光板の輝度を向上し、輝度む
らを改善することができる。In the present invention, since the mounting hole which was in the light path of the light guide plate in the past is eliminated and the mounting hole is installed at a position where it does not obstruct the entrance of light, the brightness of the light guide plate is improved and the uneven brightness is improved. can do.
【０００８】[0008]
【実施例】図１は、本発明の液晶表示装置のバックライ
トと導光板の一実施例の平面図である。1 is a plan view of an embodiment of a backlight and a light guide plate of a liquid crystal display device of the present invention.
【０００９】１は冷陰極蛍光管（ＣＦＬ）等の管状のバ
ックライト、２はバックライト１の発光領域（ソケット
取付部を除く光が発せられる領域）、３は導光板、４は
導光板３の有効表示領域、５は導光板３に一体に設けた
出っ張り、６は出っ張り５に設けられ、導光板３を図示
しないフレームへ取り付けるための取付穴（ねじ穴）、
ａはバックライト１の長軸方向である。Reference numeral 1 is a tubular backlight such as a cold cathode fluorescent tube (CFL), 2 is a light emitting region of the backlight 1 (a region from which light is emitted excluding the socket mounting portion), 3 is a light guide plate, and 4 is a light guide plate 3. The effective display area 5 is a protrusion provided integrally with the light guide plate 3, and 6 is provided on the protrusion 5 for attaching the light guide plate 3 to a frame (not shown) (screw hole),
a is the major axis direction of the backlight 1.
【００１０】すなわち、本実施例では、導光板３の両端
部にバックライト１の長軸方向ａに出っ張る出っ張り５
を２個設け、これらの出っ張り５にそれぞれ取付穴６を
バックライト１の発光領域２の外側に存在するように設
けた。これにより、従来、導光板における光の通り道に
あった取付穴を無くし、取付穴６を入光の妨げとならな
い位置に設置したので、取付穴による入光妨げの悪影響
をなくし、バックライト１の光を導光板３の有効表示領
域４にまんべんなく効率良く取り込むことができる。従
って、導光板３表面の輝度を向上し、輝度むらを改善す
ることができ、その結果、液晶表示装置の表示品質を向
上することができる。That is, in the present embodiment, the protrusions 5 protruding from both ends of the light guide plate 3 in the major axis direction a of the backlight 1.
Two of them are provided, and mounting holes 6 are respectively provided in the protrusions 5 so as to exist outside the light emitting region 2 of the backlight 1. As a result, the conventional mounting hole in the light path of the light guide plate is eliminated, and the mounting hole 6 is installed at a position that does not obstruct the light input. The light can be evenly and efficiently taken into the effective display area 4 of the light guide plate 3. Therefore, the brightness of the surface of the light guide plate 3 can be improved, and the uneven brightness can be improved, and as a result, the display quality of the liquid crystal display device can be improved.
【００１１】図２は、本発明の液晶表示装置のバックラ
イトと導光板の一実装方法を示す分解斜視図である。FIG. 2 is an exploded perspective view showing a mounting method of the backlight and the light guide plate of the liquid crystal display device of the present invention.
【００１２】１は冷陰極蛍光管等の環状のバックライ
ト、３は導光板、９はプリント基板、５は導光板３に一
体に設けた出っ張り、６は出っ張り５に設けられ、導光
板３をプリント基板９に取り付けるための取付穴、７は
液晶表示装置のフレーム、８は液晶ディスプレイ（ＬＣ
Ｄ）、１０は冷陰極蛍光管１を覆う形で取り付けられる
ＣＦＬカバー、１１は導光板３とプリント基板９とＣＦ
Ｌカバー１０とを固定するためのねじ（リベット）であ
る。1 is an annular backlight such as a cold cathode fluorescent tube, 3 is a light guide plate, 9 is a printed circuit board, 5 is a protrusion provided integrally with the light guide plate 3, 6 is provided on the protrusion 5, and the light guide plate 3 is provided. Mounting holes for mounting on the printed circuit board 9, 7 is a frame of the liquid crystal display device, 8 is a liquid crystal display (LC
D) 10 is a CFL cover attached so as to cover the cold cathode fluorescent tube 1, 11 is a light guide plate 3, a printed circuit board 9 and a CF
It is a screw (rivet) for fixing the L cover 10.
【００１３】本実装方法は、導光板３とプリント基板９
とＣＦＬカバー１０にそれぞれ設けられている取付穴を
貫通する形で、ねじ１１を用いて固定する。この様子を
図３に示す。液晶ディスプレイ８とプリント基板９との
電気的接続は、図示しないコネクタ（ヒートシールとイ
ンターコネクタ）を介して行う。最後に、導光板３と液
晶ディスプレイ８を覆う形でフレーム７をプリント基板
９に取り付ける。In this mounting method, the light guide plate 3 and the printed circuit board 9 are used.
And CFL cover 10 are fixed by using screws 11 so as to penetrate through the mounting holes respectively provided in CFL cover 10. This state is shown in FIG. The electrical connection between the liquid crystal display 8 and the printed circuit board 9 is made via a connector (heat seal and interconnector) not shown. Finally, the frame 7 is attached to the printed board 9 so as to cover the light guide plate 3 and the liquid crystal display 8.
【００１４】以上本発明を上記実施例に基づいて具体的
に説明したが、本発明は上記実施例に限定されるもので
はなく、その要旨を逸脱しない範囲において種々変更可
能であることは勿論である。Although the present invention has been specifically described based on the above embodiments, the present invention is not limited to the above embodiments and various modifications can be made without departing from the scope of the invention. is there.
【００１５】[0015]
【発明の効果】以上説明したように本発明では、従来の
ように取付穴の影響を受けることなく、バックライトの
光を導光板に効率良く取り入れることができるので、導
光板の輝度を向上し、輝度むらを改善でき、表示品質を
向上できる。As described above, according to the present invention, since the light of the backlight can be efficiently taken into the light guide plate without being affected by the mounting holes as in the conventional case, the brightness of the light guide plate is improved. The uneven brightness can be improved, and the display quality can be improved.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の液晶表示装置のバックライトと導光板
の一実施例の平面図である。FIG. 1 is a plan view of an embodiment of a backlight and a light guide plate of a liquid crystal display device of the present invention.
【図２】本発明の液晶表示装置のバックライトと導光板
の一実装方法を示す分解斜視図である。FIG. 2 is an exploded perspective view showing a mounting method of the backlight and the light guide plate of the liquid crystal display device of the present invention.
【図３】本発明の液晶表示装置のバックライトと導光板
の一実装方法を示す分解斜視図である。FIG. 3 is an exploded perspective view showing a mounting method of the backlight and the light guide plate of the liquid crystal display device of the present invention.
【符号の説明】 １…冷陰極蛍光管（ＣＦＬ）等の管状のバックライト、
２…発光領域（ＣＦＬのソケット取付部を除く光が発せ
られる領域）、３…導光板、４…有効表示領域、５…出
っ張り、６…取付穴、ａ…長軸方向、７…フレーム、８
…液晶ディスプレイ、９…プリント基板、１０…ＣＦＬ
カバー、１１…ねじ。[Explanation of Codes] 1. A tubular backlight such as a cold cathode fluorescent lamp (CFL),
2 ... Light emitting area (area where light is emitted excluding CFL socket mounting portion), 3 ... Light guide plate, 4 ... Effective display area, 5 ... Projection, 6 ... Mounting hole, a ... Long axis direction, 7 ... Frame, 8
... Liquid crystal display, 9 ... Printed circuit board, 10 ... CFL
Cover, 11 ... screw.
フロントページの続き (72)発明者 佐久間 敏幸 千葉県茂原市早野3300番地 株式会社日立 製作所茂原工場内Front page continuation (72) Inventor Toshiyuki Sakuma 3300 Hayano, Mobara-shi, Chiba Hitachi Ltd. Mobara factory
Claims (1)
示素子とほぼ同一の大きさで、上記液晶表示素子の下に
重ねて配置された導光板と、上記導光板を上記フレーム
に取り付けるための取付穴と、上記導光板の少なくとも
１辺側に配置された管状のバックライトとを有する液晶
表示装置において、上記導光板の両端部に上記バックラ
イトの長軸方向に出っ張る出っ張りを設け、上記出っ張
りに上記取付穴を上記バックライトの発光領域の外側に
存在するように設けたことを特徴とする液晶表示装置。Claim: What is claimed is: 1. A frame, a liquid crystal display element, a light guide plate which is substantially the same size as the liquid crystal display element and which is arranged below the liquid crystal display element, and the light guide plate. In a liquid crystal display device having a mounting hole for mounting the light guide plate on the frame and a tubular backlight arranged on at least one side of the light guide plate, both ends of the light guide plate in the longitudinal direction of the backlight. A liquid crystal display device, wherein a protrusion is provided, and the mounting hole is provided in the protrusion so as to exist outside the light emitting region of the backlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3168020A JPH0519254A (en) | 1991-07-09 | 1991-07-09 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3168020A JPH0519254A (en) | 1991-07-09 | 1991-07-09 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0519254A true JPH0519254A (en) | 1993-01-29 |
Family
ID=15860322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3168020A Pending JPH0519254A (en) | 1991-07-09 | 1991-07-09 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0519254A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10142426A (en) * | 1996-11-15 | 1998-05-29 | Matsushita Electric Works Ltd | Light transmission member |
| WO2008013204A1 (en) * | 2006-07-28 | 2008-01-31 | Nec Corporation | Illuminating device, liquid crystal display device provided with the illuminating device and portable terminal device |
| KR20180014305A (en) * | 2016-07-28 | 2018-02-08 | 엘지디스플레이 주식회사 | back light unit and DISPLAY DEVICE comprising the same |
-
1991
- 1991-07-09 JP JP3168020A patent/JPH0519254A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10142426A (en) * | 1996-11-15 | 1998-05-29 | Matsushita Electric Works Ltd | Light transmission member |
| WO2008013204A1 (en) * | 2006-07-28 | 2008-01-31 | Nec Corporation | Illuminating device, liquid crystal display device provided with the illuminating device and portable terminal device |
| JP2008034223A (en) * | 2006-07-28 | 2008-02-14 | Nec Saitama Ltd | Illumination device, liquid crystal display device, and portable terminal device |
| US8139180B2 (en) | 2006-07-28 | 2012-03-20 | Nec Corporation | Illuminating device, and liquid crystal display device and portable terminal device including the illuminating device |
| KR20180014305A (en) * | 2016-07-28 | 2018-02-08 | 엘지디스플레이 주식회사 | back light unit and DISPLAY DEVICE comprising the same |
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