JPH117011A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH117011A JPH117011A JP16003097A JP16003097A JPH117011A JP H117011 A JPH117011 A JP H117011A JP 16003097 A JP16003097 A JP 16003097A JP 16003097 A JP16003097 A JP 16003097A JP H117011 A JPH117011 A JP H117011A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- display device
- display panel
- heat
- 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)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は文字および画像等を
表示する液晶表示装置、特に外部の発熱を液晶表示パネ
ルに対して均一に放熱させることに優れた液晶表示装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device for displaying characters and images, and more particularly to a liquid crystal display device excellent in uniformly radiating external heat to a liquid crystal display panel.
【０００２】[0002]
【従来の技術】以下、従来の液晶表示装置について図面
を参照しつつ説明する。図２は従来の液晶表示装置の一
例を示す縦方向断面図、図３は図２に示す液晶表示装置
の横方向断面図である。これらの図面に示すように、従
来の液晶表示装置の基本構成は駆動回路を備えた液晶表
示パネル１を樹脂フレーム３を有する平面照明装置と外
形を覆う金属フレーム２ではさみ、カシメ、もしくはネ
ジ締め等により固定したものである。一般に駆動回路
は、ドライバーＬＳＩ11をフィルムキャリア10の配線パ
ターン上にボンディングしたＴＣＰを、ドライバー出力
側は液晶表示パネルに異方導電性接着材で接続し、ドラ
イバー入力側は、オペアンプ等の回路部品12を実装した
プリント配線基板９に半田付けする。2. Description of the Related Art A conventional liquid crystal display device will be described below with reference to the drawings. FIG. 2 is a vertical sectional view showing an example of a conventional liquid crystal display device, and FIG. 3 is a horizontal sectional view of the liquid crystal display device shown in FIG. As shown in these drawings, a basic configuration of a conventional liquid crystal display device is such that a liquid crystal display panel 1 having a driving circuit is sandwiched, caulked, or screwed between a flat lighting device having a resin frame 3 and a metal frame 2 covering an outer shape. It is fixed by such as. In general, the driver circuit is a TCP in which a driver LSI 11 is bonded on a wiring pattern of a film carrier 10, the driver output side is connected to a liquid crystal display panel with an anisotropic conductive adhesive, and the driver input side is a circuit component 12 such as an operational amplifier. Is soldered to the printed wiring board 9 on which is mounted.
【０００３】液晶表示装置の背面照明に使用する平面照
明装置は、図２に示すように線状発光体である冷陰極管
５からの光線を光反射部材であるリフレクター15で導光
手段である導光体６の端面に入射し、導光体６の主面か
らの出射光を光拡散手段である拡散シート７を用いて望
ましい出射光特性に変換し、集光手段であるプリズムシ
ート８にて光効率上げる構成になっている。As shown in FIG. 2, a flat illuminating device used for backlighting a liquid crystal display device is a light guide means for guiding a light beam from a cold cathode tube 5 which is a linear illuminant by a reflector 15 which is a light reflecting member. The light incident on the end face of the light guide 6 is converted from the light emitted from the main surface of the light guide 6 into desired emission light characteristics by using a diffusion sheet 7 as a light diffusion means. It is configured to increase light efficiency.
【０００４】導光体６にはアクリル等の透明樹脂を平板
あるいはくさび形状に成形し、出射光効率および輝度均
一性を上げるために裏面に白色ドット状印刷あるいは成
形による粗面を設け、さらにこの裏面はほぼ全面に白色
樹脂等の反射手段が設けられた構成になっている。な
お、冷陰極管用電源14により点灯されている冷陰極管５
の熱を放熱させるために裏金属フレーム４と導光体６と
の間には平面状の金属板13が挿入されることがある。こ
の金属板にはアルミ等が用いられる。The light guide 6 is formed by molding a transparent resin such as acrylic into a flat plate or a wedge shape, and providing a rough surface by white dot printing or molding on the back surface in order to increase the emission light efficiency and the luminance uniformity. The rear surface has a configuration in which a reflection means such as a white resin is provided on almost the entire surface. The cold-cathode tube 5 lit by the cold-cathode tube power supply 14
A flat metal plate 13 may be inserted between the back metal frame 4 and the light guide 6 to dissipate the heat. Aluminum or the like is used for this metal plate.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の構成は、外形が小さく、消費電流が少ないこ
とから、主としてワードプロセッサ、ノートパソコンな
どに使用されているものの、近年においてはノートパソ
コンのコンパクト化、画面の大型化により、液晶表示装
置の有効表示領域外の外形までの部分をより狭額縁化す
ることが要求されている。However, such a conventional structure is mainly used for a word processor, a notebook personal computer and the like because of its small size and low current consumption. As the size and size of the screen increase, there is a demand for a narrower frame up to the outer shape outside the effective display area of the liquid crystal display device.
【０００６】しかしこの狭額縁化は、冷陰極管、駆動回
路部品と液晶表示パネルとの距離を狭め、また、液晶表
示装置と外部の冷陰極管用電源との距離もより狭めるこ
とになるので、冷陰極管の発熱が液晶表示パネルに伝わ
って液晶表示パネルとの近接部分が高温となり、冷陰極
管から遠い部分との温度差を生じ、この温度差が液晶表
示パネル上で表示ムラとなって見える。即ち、画面全体
に対して、高温となる部分が液晶の温度特性により、表
示上白っぽく見えることになる。However, this narrowing of the frame narrows the distance between the cold-cathode tubes and the driving circuit components and the liquid crystal display panel, and further narrows the distance between the liquid crystal display device and the external power supply for the cold-cathode tubes. The heat generated by the cold-cathode tube is transmitted to the liquid crystal display panel, and the temperature in the vicinity of the liquid-crystal display panel becomes high, causing a temperature difference with the portion far from the cold-cathode tube. This temperature difference causes display unevenness on the liquid crystal display panel. appear. In other words, the high temperature portion of the entire screen looks whitish on the display due to the temperature characteristics of the liquid crystal.
【０００７】この表示ムラを軽減するために、導光体と
裏金属フレーム間に熱伝導のよいアルミ等の平面な金属
板を入れ、冷陰極管の熱を放熱し、均一に液晶表示パネ
ルに熱を分散させる構成のものがあるが、発熱する部品
は冷陰極管だけではなく、オペアンプ等の駆動回路部品
や冷陰極管用電源が近接しており、前記金属板はこれら
からの熱を分散させる効果が少ないので、これらの熱が
表示ムラ発生の一因になるという問題点がある。In order to reduce the display unevenness, a flat metal plate such as aluminum having good heat conductivity is inserted between the light guide and the back metal frame to radiate the heat of the cold-cathode tube to uniformly form the liquid crystal display panel. There is a configuration that disperses heat, but the components that generate heat are not only cold cathode tubes, but also drive circuit components such as operational amplifiers and power supplies for cold cathode tubes, and the metal plate disperses heat from these components. Since there is little effect, there is a problem that these heats contribute to display unevenness.
【０００８】本発明は上記従来の問題点を解決するもの
であり、構成部品が発する熱を液晶表示パネルに均一に
分散することができる液晶表示装置を提供することを目
的とするものである。An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a liquid crystal display device capable of uniformly dispersing heat generated by components to a liquid crystal display panel.
【０００９】[0009]
【課題を解決するための手段】本発明の液晶表示装置
は、液晶表示パネル背部に線状発光体と導光体よりなる
背面照明を有し、さらにその外側位置に回路部品および
線状発光体電源を備えた液晶表示装置であって、前記導
光体の背面および少なくとも前記回路部品および前記線
状発光体電源の配置されている側の側面に沿うように立
体的に成形した金属板を前記導光体に密着配置したもの
である。The liquid crystal display device of the present invention has a back light comprising a linear illuminator and a light guide at the back of the liquid crystal display panel, and further includes circuit components and a linear illuminator at positions outside the illuminator. A liquid crystal display device provided with a power supply, wherein a metal plate formed three-dimensionally along a rear surface of the light guide and at least a side surface on which the circuit components and the linear light source power source are arranged. It is arranged in close contact with the light guide.
【００１０】この発明によれば冷陰極管の熱だけでな
く、回路部品および液晶表示装置外側に配置されている
冷陰極管用電源の熱も均一に分散し、液晶表示パネルの
熱ムラをより軽減することができる。According to the present invention, not only the heat of the cold-cathode tubes but also the heat of the circuit components and the power supply for the cold-cathode tubes disposed outside the liquid crystal display device are evenly dispersed, thereby further reducing the heat unevenness of the liquid crystal display panel. can do.
【００１１】[0011]
【発明の実施の形態】以下、本発明の一実施の形態につ
いて図面を参照しつつ説明する。なお、前記従来のもの
と同一部分は同一符号を用いるものとする。図１は本発
明の液晶表示装置の一実施の形態における構成を示す分
解斜視図であり、図中、１は液晶表示パネル、２は金属
フレーム、３は樹脂フレーム、４は裏金属フレーム、５
は冷陰極管、６は導光体、７は拡散シート、８はプリズ
ムシート、９はプリント基板、10はフィルムキャリア、
11はドライバーＬＳＩ、12は回路部品、13は金属板、14
は冷陰極管用電源、15はリフレクターである。ここで、
アルミの金属板13は導光体６の背面および少なくとも回
路部品12および冷陰極管用電源14の配置されている側の
側面に沿うようにこれと密着しながら両端部で曲げら
れ、垂直端部13a，13bを形成している。即ち、コの字型
に曲げられた形で立体的に成形され、導光体６と裏金属
フレーム４との間に挿入されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. It is to be noted that the same reference numerals are used for the same parts as those of the conventional one. FIG. 1 is an exploded perspective view showing a configuration of a liquid crystal display device according to an embodiment of the present invention, in which 1 is a liquid crystal display panel, 2 is a metal frame, 3 is a resin frame, 4 is a back metal frame, 5
Is a cold cathode tube, 6 is a light guide, 7 is a diffusion sheet, 8 is a prism sheet, 9 is a printed circuit board, 10 is a film carrier,
11 is a driver LSI, 12 is a circuit component, 13 is a metal plate, 14
Is a power supply for a cold cathode tube, and 15 is a reflector. here,
The aluminum metal plate 13 is bent at both ends while being in close contact with the rear surface of the light guide 6 and at least along the side surface on which the circuit component 12 and the cold cathode fluorescent lamp power supply 14 are arranged, and the vertical end 13a , 13b. That is, it is formed three-dimensionally in a shape bent into a U-shape, and is inserted between the light guide 6 and the back metal frame 4.
【００１２】このように構成することにより、液晶表示
パネル１に最も近接配置されている冷陰極管５の熱は液
晶表示パネル１と金属板13に伝えられ、また、オペアン
プ等の回路部品12の熱はプリント基板９，樹脂フレーム
３を通して液晶表示パネル１と金属板13の垂直端部13a
に伝えられる。同様に、冷陰極管用電源14の熱も反対側
より液晶表示パネル１と垂直端部13bに伝えられ、これ
らの熱は金属板13と液晶表示パネル１の放熱機能によ
り、略均一に放熱されることになる。With this configuration, the heat of the cold-cathode tube 5 disposed closest to the liquid crystal display panel 1 is transmitted to the liquid crystal display panel 1 and the metal plate 13, and the heat of the circuit components 12 such as an operational amplifier is formed. Heat is applied through the printed circuit board 9 and the resin frame 3 to the liquid crystal display panel 1 and the vertical end 13a of the metal plate 13.
Conveyed to. Similarly, the heat of the cold-cathode tube power supply 14 is also transmitted from the opposite side to the liquid crystal display panel 1 and the vertical end 13b, and the heat is substantially uniformly radiated by the heat radiating function of the metal plate 13 and the liquid crystal display panel 1. Will be.
【００１３】以上のように本実施の形態によれば、コの
字型に成形した金属板は、回路部品や冷陰極管用電源か
らの熱をその垂直端部から直接受け止め、金属板全体に
その熱を伝え、均一に放熱するので、液晶表示パネル自
身の放熱機能と相俟って、液晶表示パネルの熱による表
示ムラを軽減することができる。As described above, according to the present embodiment, the U-shaped metal plate directly receives the heat from the circuit components and the cold cathode fluorescent lamp power supply from its vertical end, and the entire metal plate receives the heat. Since heat is transmitted and heat is uniformly radiated, display unevenness due to heat of the liquid crystal display panel can be reduced in combination with the heat radiation function of the liquid crystal display panel itself.
【００１４】[0014]
【発明の効果】以上のように本発明によれば、構成部品
が発する熱を液晶表示パネルに均一に分散することがで
き、液晶表示パネル内の温度差による表示ムラを軽減す
ることができるという有利な効果が得られる。As described above, according to the present invention, the heat generated by the components can be uniformly distributed to the liquid crystal display panel, and the display unevenness due to the temperature difference in the liquid crystal display panel can be reduced. An advantageous effect is obtained.
【図１】本発明の液晶表示装置の一実施の形態における
構成を示す分解斜視図である。FIG. 1 is an exploded perspective view showing a configuration of a liquid crystal display device according to an embodiment of the present invention.
【図２】従来の液晶表示装置の一例を示す縦方向断面図
である。FIG. 2 is a longitudinal sectional view showing an example of a conventional liquid crystal display device.
【図３】図２に示す従来の液晶表示装置の横方向断面図
である。FIG. 3 is a lateral sectional view of the conventional liquid crystal display device shown in FIG.
１…液晶表示パネル、 ２…金属フレーム、 ３…樹脂
フレーム、 ４…裏金属フレーム、 ５…冷陰極管、
６…導光体、 ７…拡散シート、 ８…プリズムシー
ト、 ９…プリント基板、 10…フィルムキャリア、
11…ドライバーＬＳＩ、 12…回路部品、 13…金属
板、 14…冷陰極管用電源、 15…リフレクター。DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display panel, 2 ... Metal frame, 3 ... Resin frame, 4 ... Back metal frame, 5 ... Cold cathode tube,
6 light guide, 7 diffusion sheet, 8 prism sheet, 9 printed circuit board, 10 film carrier,
11 ... Driver LSI, 12 ... Circuit parts, 13 ... Metal plate, 14 ... Power supply for cold cathode tubes, 15 ... Reflector.
Claims (1)
体よりなる背面照明を有し、さらにその外側位置に回路
部品および線状発光体電源を備えた液晶表示装置であっ
て、前記導光体の背面および少なくとも前記回路部品お
よび前記線状発光体電源の配置されている側の側面に沿
うように立体的に成形した金属板を前記導光体に密着配
置したことを特徴とする液晶表示装置。1. A liquid crystal display device comprising: a back illuminator comprising a linear illuminant and a light guide at a back portion of a liquid crystal display panel; and a circuit component and a linear illuminant power supply at an outer position thereof. A three-dimensionally shaped metal plate is closely attached to the light guide so as to be along the back surface of the light guide and at least the side surface on which the circuit components and the linear illuminant power source are arranged. Liquid crystal display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16003097A JP3900214B2 (en) | 1997-06-17 | 1997-06-17 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16003097A JP3900214B2 (en) | 1997-06-17 | 1997-06-17 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH117011A true JPH117011A (en) | 1999-01-12 |
| JP3900214B2 JP3900214B2 (en) | 2007-04-04 |
Family
ID=15706447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16003097A Expired - Fee Related JP3900214B2 (en) | 1997-06-17 | 1997-06-17 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3900214B2 (en) |
-
1997
- 1997-06-17 JP JP16003097A patent/JP3900214B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3900214B2 (en) | 2007-04-04 |
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