JP3599348B2 - Liquid crystal display - Google Patents

Liquid crystal display Download PDF

Info

Publication number
JP3599348B2
JP3599348B2 JP53241697A JP53241697A JP3599348B2 JP 3599348 B2 JP3599348 B2 JP 3599348B2 JP 53241697 A JP53241697 A JP 53241697A JP 53241697 A JP53241697 A JP 53241697A JP 3599348 B2 JP3599348 B2 JP 3599348B2
Authority
JP
Japan
Prior art keywords
liquid crystal
crystal display
display element
circuit board
sides
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.)
Expired - Lifetime
Application number
JP53241697A
Other languages
Japanese (ja)
Inventor
博文 福元
洋之 高橋
孝之 井浦
芳郎 菅谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Application granted granted Critical
Publication of JP3599348B2 publication Critical patent/JP3599348B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G02F1/13452—Conductors connecting driver circuitry and terminals of panels
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/148—Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H05K3/361—Assembling flexible printed circuits with other printed circuits

Description

〔技術分野〕
本発明は、情報処理装置の情報や画像を出力する表示部や、情報を伝達する装置の情報や画像を表示する表示部に使用される液晶表示装置に関する。特に液晶表示装置の表示領域に対して、液晶表示素子を駆動する駆動回路を設ける領域を有する液晶表示装置に関する。
〔背景技術〕
モービル・コンピューティング時代の幕開けとともに、実用に耐えうる携帯性能の実現に向けて、表示装置の薄型軽量、低消費電力化が望まれている。
このような薄型軽量、低消費電力の表示装置として、近年は液晶表示装置が多用されるようになっている。
Fig.1は液晶表示装置の構成例を説明する平面図であって100は液晶表示素子である。液晶表示素子100は略長方形をしており液晶表示素子を駆動する駆動回路は、液晶表示素子の辺に沿って設けられる。600は電子回路をプリント配線基板に形成した回路基板であり、この回路基板600からの出力をテープキャリア方式で形成された半導体IC200を介して液晶表示素子の各端子に入力している。回路基板は液晶表示素子の辺毎に分割されており、液晶表示素子の略直交する２辺の作る角部には、回路基板と回路基板とを、電気的に接続する接続配線基板700が設けられる。
このような駆動回路が実装された液晶表示素子は、略長方形のケースに収められる。該ケースには、表示窓が開いており、該表示窓を通して液晶表示素子の表示領域が観察できるようになっている。表示窓からケースの周辺に及ぶ領域は通常額縁と称される。この額縁が占有する領域には、上述して、回路基板、半導体IC、接続配線基板が収納される。
Fig.2に従来の液晶表示装置900を搭載したパーソナルコンピュータの外形を示す。従来の液晶表示装置では、表示領域周辺の額縁部920と、液晶表示装置をパーソナルコンピュータに取り付ける取付部910等の表示に用いられない領域が広い面積を占めていた。
しかしながら、このようなパーソナルコンピュータに搭載される液晶表示装置は、額縁の幅を少しでも小さくすることが要望されている。無駄なスペースをなくし、表示装置としての美観を惹起せしめるようになるからである。
また液晶表示素子の角部周辺には、回路基板どうしを電気的に接続する接続配線基板が配置されており、液晶表示素子の角部周辺の額縁の幅を狭くすることを妨げており、さらに液晶表示素子の角部周辺に接続配線基板以外の構成物、例えば取付部910を配置することができなかった。
それ故、本発明は、このような事情に基づいてなされたものであり、本発明の一つの目的は、いわゆる額縁の領域をより小さくできる液晶表示装置を提供することにある。また本発明の一つの目的は、液晶表示素子の角部周辺の領域を有効に利用できる液晶表示素子を提供することにある。
〔発明の開示〕
液晶表示素子と、該液晶表示素子を駆動させるための電子部品を搭載した回路基板と、上記液晶表示素子及び回路基板とを収納するケースと、上記液晶表示素子の隣接する少なくとも２辺に沿ってそれぞれ配置される回路基板と、上記液晶表示素子の上記２辺によって作られる角部において上記回路基板を電気的に接続させる接続配線基板とを少なくとも備えるものであって、接続配線基板を、液晶表示素子とを重なるように配置する。
液晶表示素子と、該液晶表示素子をその間に挟持し収納する上側ケースと下側ケースと、上記液晶表示素子を駆動し液晶表示素子の隣接する少なくとも２辺に沿ってそれぞれ配置されるプリント基板と、上記液晶表示素子の２辺の作る角部において上記プリント基板を電気的に接続するフレキシブル配線基板と、上記液晶表示素子の２辺の作る角部近傍において記上側ケースと下側ケースとを固定する固定部と、他の装置との取付け部とを有し、上記フレキシブル配線基板は、上記液晶表示素子の ２辺の作る角部に沿うように曲がって形成され、該フレ キシブル配線基板の一部が上記角部と重なって配設さ れ、上記他の装置との取付け部と、上記固定部とは、上 記２辺に沿ってそれぞれ配置されるプリント基板の延長 線上の角部に設けられることを特徴とする。
液晶表示素子と、上記液晶表示素子の隣接する少なくとも２辺に沿って上記回路基板をそれぞれ配置し、上記液晶表示素子の上記２辺によって作られる角部において上記回路基板を電気的に接続させる配線基板と、上記液 晶表示素子の２辺の作る角部の近傍において他の装置と の取付け部とを少なくとも備えるものであって、上記配 線基板を、液晶表示素子の２辺の作る角部に沿うように 曲がって形成され、該配線基板の一部が上記角部と重なるように配置し、上記角部に外部装置との取付部を設けることを特徴とする。
【図面の簡単な説明】
FIG.1は液晶表示装置の従来例を示す平面図である。
FIG.2は液晶表示装置を搭載したパーソナルコンピュータの従来例を示す外形図である。
FIG.3は本発明による液晶表示装置の斜視図である。
FIG.4は本発明による液晶表示素子を示す概略斜視図である。
FIG.5は本発明によるフレキシブル配線基板の表面を示す図である。
FIG.6は本発明によるフレキシブル配線基板の裏面を示す図である。
FIG.7は本発明によるフレキシブル配線基板の断面図である。
FIG.8は本発明による液晶表示装置の概略組立て図である。
FIG.9は本発明による液晶表示装置の角部を示す概略図である。
FIG.10は本発明の液晶表示装置を搭載したパーソナルコンピュータを示す外形図である。
FIG.11は本発明によるモールドの平面図である。
FIG.12は本発明によるモールドの実施の形態を示す図である。
FIG.13はモールドの従来例を示す図である。
〔発明を実施するための最良の形態〕
Fig.3は、本発明による液晶表示装置の実施の形態の斜視図である。
液晶表示素子100の周辺には、プリント回路基板600A、600B、610が配置され、プリント回路基板と液晶表示素子とはテープキャリア方式で形成された半導体IC200A、200B、250を介して接続される。プリント回路基板が接続された液晶表示素子は、枠状のモールド800に保持され上側ケース350と下側ケース300とに挟まれて収納される。上側ケース350と下側ケース300とを固定するために、それぞれ固定部360、310が設けられる。また液晶表示素子100の下側には、液晶表示装置の光源となるバックライト400が設けられる。このバックライトは冷陰極蛍光管430、該冷陰極蛍光管からの光を液晶表示素子に均一に照射されるためのアクリル板からなる導光板440、金属板に白色塗料を塗布して形成した反射板450、導光板からの光を拡散する乳白色の拡散板460から構成される。液晶表示素子の角部Ａには、プリント回路基板600Bと610とを電気的に接続するフレキシブル配線基板700が設けられる。
Fig.4は本発明による液晶表示装置に使用される液晶表示素子の概略構成を示す斜視図である。Fig.4において120はセグメント電極基板、110はコモン電極基板、140はセグメント電極、130はコモン電極170はシール材である。コモン電極基板110は略長方をした、ガラス等の透明基板で構成され、帯状の透明電極からなる複数のコモン電極130が形成される。
またセグメント電極基板120は、同じく略長方形をした、ガラス等の透明基板から構成され、セグメント電極基板の上に帯状の透明電極からなるセグメント電極140が形成される。
コモン電極基板110、セグメント電極基板120の外側には、図示しないが偏光板が設けられる。195にコモン電極基板110上で上記偏光板が設けられる領域を示す。
Fig.4に示す液晶表示素子は、シール材170を介し前記セグメント電極基板120とコモン電極基板110とが一定の隙間を隔てて重ね合せられる、シール材はセグメント電極基板とコモン電極基板間の各基板の縁部に枠状に設けられており、シール材とセグメント電極基板とコモン電極基板は前記隙間を保って両基板が貼り合された容器を形成しており、内部に液晶を封入して組み立てられる。
Fig.4に示すように、コモン電極とセグメント電極とは、互いに直交しており、コモン電極と、セグメント電極との交点が１画素を構成する。
コモン電極130、セグメント電極120は、それぞれコモン電極基板110、セグメント電極基板120の辺部にまで延在しており、駆動回路と電気的に接続するための外部接続端子150、160を形成する。
液晶表示素子100は、前述したように略長方形のコモン電極基板110、セグメント電極基板120をコモン電極130とセグメント電極120が交差するように重ね合せ、コモン電極、セグメント電極それぞれを延在した位置に外部接続電極150、160が設けられるため、Fig.3に示すように、液晶表示素子を駆動する駆動用IC200A,200B、250、プリント回路基板600A,600B、610は液晶表示素子の少なくとも２辺の周辺に設けられることになる。この２辺に設けられたプリント回路基板を電気的に接続するのに、フレキシブル基板700が使用される。
Fig.5に本発明によるフレキシブル配線基板の表から見た平面図を、Fig.6に本発明によるフレキシブル配線基板の裏から見た平面図を示す。このフレキシブル配線基板700は、柔軟性を有する基板に導体で配線を形成したもので、Fig.5、Fig.6には、柔軟性を有する基板760の表と裏に２層の配線710が形成されている。Fig.7にFig.6中Ｂ−Ｂ′線で切断した断面図を示す。２層の配線710は、端子部720で２層の配線間の導通がとられ、この端子部720で半田付けによりプリント回路基板に接続される。２層の配線において、周波数の高い信号配線730をGND配線740で囲む配置すると高周波ノイズ等の漏れを防ぐ効果がある。
また配線のインピーダンスを下げ電流を多く流すために、電源の配線750、GND配線740は幅を広くとっている。
Fig.8にFig.3の液晶表示素子の隣接する２辺が作る角部を拡大した斜視図を示す。Fig.8は液晶表示素子100に駆動用IC200B、250をテープキャリア方式で実装し、駆動用IC200B、250をプリント回路基板600B、610に接続し、プリント回路基板600Bと610との裏面を、フレキシブル配線基板700で接続し、モールド800で上記駆動回路を実装した液晶表示素子を保持し、上側ケース360、下側ケース300に収納する素子を示す。
Fig.8において、まず、液晶表示装置の外枠体の一部を構成する下側ケース300がある。そして、この下側ケース300は、その角部において後述する上側ケースとの固定を図るための固定部310が備えられた箱形状をなしたものとなっている。
さらに、プリント回路基板610と液晶表示素子100との間には、たとえばテープキャリア方式で形成された半導体ICからなるコモン電極駆動回路250が配置され、そのコモン電極駆動回路250の電極端子は、その一方において前記コモン基板110の外部接続端子150に接続されているとともに、他方においてコモン側プリント回路基板610上の電極端子に接続されている。
また、液晶表示素子100のセグメント基板の外部接続端子側の辺において、セグメント側プリント回路基板600Bが配置されている。さらに、このセグメント側プリント回路基板600Bと液晶表示素子100との間には、たとえばテープキャリア方式で形成された半導体ICからなるセグメント電極駆動回路200Bが配置され、そのセグメント電極駆動回路200Bの電極端子は、その一方において前記セグメント基板120の外部接続端子160に接続されている。
ここで、プリント回路基板610と600Bはそれぞれ別体となっているとともに、その長手方向における端部は下側ケース300の固定部310に当接する程度にまで及んで形成されている。各回路基板610、600Bのそれぞれの面積を所定の値以上に確保するとともに、その幅をできるだけ小さくしようとすると、その長さは該固定部310に当接する程度にまで及んでしまうからである。
そして、これら各プリント回路基板610と600Bは電気的に接続される必要があり、その接続をフレキシブル配線基板700を介して行っている。Fig.8では、わかりやすいように、フレキシブル配線基板700が回路基板610、600Bの裏面に接続される前の位置関係を示している。実際には、フレキシブル配線基板700は直接、回路基板610、600Bの裏面に接続される。
Fig.9にFig.3のＡ部の各部品配置を示す模式拡大図を示す。フレキシブル配線基板700と他の部品との位置関係を解りやすくするために、Fig.8とは反対側から、回 路基板610、600Bの裏面が見えるように記載してある。フレキシブル配線基板700は、固定部310に当接しないように配置されているが、フレキシブル配線基板700は、液晶表示素子100の２辺の作る角に沿うように曲がって形成され、一部が液晶表示素子100の非表示部180と重なっている。
フレキシブル配線基板700の配線が液晶表示素子と重なるようにして配置されている理由は、上側ケース350の固定部360とこの固定部360に近接する液晶表示素子100との限られたスペースを有効に利用するためには、該フレキシブル配線基板700の上述したような配置が最も効果的となるからである。ただし液晶表示素子100には表示領域190があり、この表示領域190にフレキシブル配線基板700が重なると表示装置としての美観が損なわれるためにフレキシブル配線基板700が表示領域190に重ならないようにする必要がある。また偏光板を設ける領域195があり、この偏光板を設ける領域195にフレキシブル配線基板700が重なると液晶表示装置の厚さが増すためにフレキシブル配線基板700が偏光板を設ける領域195に重ならないようにする必要もある。このためフレキシブル配線基板700の幅には制限があり、狭い幅で多数の配線を設けることができるよう、フレキシブル配線基板700は多層構造としてある。
また回路基板610と600Bの延長線上に位置する、角部950にはフレキシブル配線基板700や、上側ケース350の固定部360等が設けられてなく、Fig.10に示すように、パーソナルコンピュータの液晶表示装置取付け部910を設けることができる。
また液晶表示素子を保持するモールド800は、フレキシブル配線基板700と液晶表示素子が重なって配置されるために、フレキシブル配線基板700が配設されるモールド800の一部810がフレキシブル配線基板の厚さ分削除されている。Fig.11に本発明に用いられるモールド800を示す。Fig.12にFig.11のＣ部の拡大図を示し、Fig.13に同じＣ部の従来例を示す。従来例のモールド830に対して、Fig.12中810で示す部分が削除されており、液晶表示素子に重なって配置されれるフレキシブル配線基板700の厚さ分モールドの厚さを削っている。
以上説明したことから明らかなように、本発明による液晶表示装置によれば、そのフレキシブル配線基板は、液晶表示素子と重なるように配置されている。このため、下側ケースの固定部とこの固定部に近接する液晶表示基板との限られたスペースを有効に利用できるようになる。
このようなことから、液晶表示基板と下側ケースの枠壁との間のスペース（幅）を大きくする必要がなくなり、従って、その幅を従来よりも小さくできる効果を奏するようになる。
〔産業上の利用可能性〕
このように構成した液晶表示装置によれば、接続配線基板は、液晶表示素子の角部における配線が、液晶表示素子と重なって配置されるので、液晶表示素子の角部に接続配線基板以外の部材を設けることができる。このため、液晶表示素子の角部に近接する液晶表示素子との限られたスペースを有効に利用できるようになる。
また液晶表示素子と液晶表示素子を収納するケースの額縁の幅を大きくする必要がなくなり、従って、その幅を従来よりも小さくできる効果を奏するようになる。
また液晶表示装置を搭載する他の外部装置に、液晶表示装置を取り付ける取付け部を液晶表示装置の角部に設けることができ、取付け部の幅を従来よりも小さくできる効果を奏するようになる。〔Technical field〕
The present invention relates to a liquid crystal display device used for a display unit that outputs information and an image of an information processing device and a display unit that displays information and an image of a device that transmits information. In particular, the present invention relates to a liquid crystal display device having a region where a driving circuit for driving a liquid crystal display element is provided for a display region of the liquid crystal display device.
(Background technology)
With the dawn of the mobile computing era, there is a demand for thin and lightweight display devices with low power consumption in order to achieve practically portable performance.
In recent years, liquid crystal display devices have been frequently used as such thin and lightweight display devices with low power consumption.
FIG. 1 is a plan view illustrating a configuration example of a liquid crystal display device, and 100 is a liquid crystal display element. The liquid crystal display element 100 has a substantially rectangular shape, and a driving circuit for driving the liquid crystal display element is provided along a side of the liquid crystal display element. Reference numeral 600 denotes a circuit board in which an electronic circuit is formed on a printed wiring board. The output from the circuit board 600 is input to each terminal of a liquid crystal display element via a semiconductor IC 200 formed by a tape carrier method. The circuit board is divided for each side of the liquid crystal display element, and a connection wiring board 700 for electrically connecting the circuit board to the circuit board is provided at a corner formed by two sides that are substantially orthogonal to the liquid crystal display element. Can be
A liquid crystal display device on which such a drive circuit is mounted is housed in a substantially rectangular case. A display window is opened in the case, and a display area of the liquid crystal display element can be observed through the display window. An area extending from the display window to the periphery of the case is generally called a picture frame. The area occupied by the frame houses the circuit board, the semiconductor IC, and the connection wiring board as described above.
Fig. 2 shows the external appearance of a personal computer equipped with a conventional liquid crystal display device 900. In the conventional liquid crystal display device, a frame area 920 around the display area and a region not used for display, such as a mounting portion 910 for attaching the liquid crystal display device to a personal computer, occupy a large area.
However, there is a demand for a liquid crystal display device mounted on such a personal computer to make the width of the frame as small as possible. This is because a wasteful space is eliminated and an aesthetic appearance as a display device is caused.
Further, around the corner of the liquid crystal display element, a connection wiring board for electrically connecting the circuit boards is arranged, which prevents the width of the frame around the corner of the liquid crystal display element from being reduced, and furthermore, A component other than the connection wiring board, for example, the mounting portion 910 could not be arranged around the corner of the liquid crystal display element.
Therefore, the present invention has been made based on such circumstances, and one object of the present invention is to provide a liquid crystal display device that can reduce the so-called frame area. Another object of the present invention is to provide a liquid crystal display device that can effectively use a region around a corner of the liquid crystal display device.
[Disclosure of the Invention]
A liquid crystal display element, a circuit board on which electronic components for driving the liquid crystal display element are mounted, a case accommodating the liquid crystal display element and the circuit board, and at least two sides adjacent to the liquid crystal display element A circuit board to be disposed, and a connection wiring board for electrically connecting the circuit board at a corner formed by the two sides of the liquid crystal display element. The elements are arranged so as to overlap.
A liquid crystal display element, an upper case and a lower case that sandwich and house the liquid crystal display element therebetween, and a printed circuit board that drives the liquid crystal display element and is disposed along at least two adjacent sides of the liquid crystal display element. A flexible wiring board for electrically connecting the printed circuit board at a corner formed by the two sides of the liquid crystal display element, and an upper case and a lower case fixed near the corner formed by the two sides of the liquid crystal display element has a fixing portion for, and a mounting portion of the other device, the flexible wiring board is formed bent along the corners make the 2 sides of the liquid crystal display device, of the deflection Kishiburu wiring substrate- parts are arranged to overlap with the corner portion, and the mounting portion with the other devices, and the fixed portion, provided in the corners of the extension line of the printed circuit board which is arranged along the upper Symbol 2 sides It is And wherein the door.
A liquid crystal display element, and the circuit board arranged along at least two sides adjacent to the liquid crystal display element, and wiring for electrically connecting the circuit board at a corner formed by the two sides of the liquid crystal display element and the substrate, there is at least provided with a mounting portion of the other devices in the vicinity of corners to make the 2 sides of the liquid crystal display device, the wiring board, the corners make the 2 sides of the liquid crystal display device And a part of the wiring board is disposed so as to overlap the corner, and a mounting portion for an external device is provided in the corner.
[Brief description of the drawings]
FIG. 1 is a plan view showing a conventional example of a liquid crystal display device.
FIG. 2 is an external view showing a conventional example of a personal computer equipped with a liquid crystal display device.
FIG. 3 is a perspective view of the liquid crystal display device according to the present invention.
FIG. 4 is a schematic perspective view showing a liquid crystal display device according to the present invention.
FIG. 5 is a diagram showing the surface of the flexible wiring board according to the present invention.
FIG. 6 is a diagram showing the back surface of the flexible wiring board according to the present invention.
FIG. 7 is a sectional view of a flexible wiring board according to the present invention.
FIG. 8 is a schematic assembly view of the liquid crystal display device according to the present invention.
FIG. 9 is a schematic view showing a corner of the liquid crystal display device according to the present invention.
FIG. 10 is an external view showing a personal computer equipped with the liquid crystal display device of the present invention.
FIG. 11 is a plan view of a mold according to the present invention.
FIG. 12 is a view showing an embodiment of a mold according to the present invention.
FIG. 13 is a view showing a conventional example of a mold.
[Best mode for carrying out the invention]
FIG. 3 is a perspective view of an embodiment of the liquid crystal display device according to the present invention.
Printed circuit boards 600A, 600B, and 610 are arranged around the liquid crystal display element 100, and the printed circuit boards and the liquid crystal display element are connected via semiconductor ICs 200A, 200B, and 250 formed by a tape carrier method. The liquid crystal display element to which the printed circuit board is connected is held by a frame-shaped mold 800 and is housed between upper case 350 and lower case 300. In order to fix the upper case 350 and the lower case 300, fixing portions 360 and 310 are provided, respectively. Further, a backlight 400 serving as a light source of the liquid crystal display device is provided below the liquid crystal display element 100. The backlight is a cold cathode fluorescent tube 430, a light guide plate 440 made of an acrylic plate for uniformly irradiating the light from the cold cathode fluorescent tube to the liquid crystal display element, and a reflection formed by applying a white paint on a metal plate. The plate 450 includes a milky white diffusion plate 460 that diffuses light from the light guide plate. A flexible wiring board 700 for electrically connecting the printed circuit boards 600B and 610 is provided at a corner A of the liquid crystal display element.
FIG. 4 is a perspective view showing a schematic configuration of a liquid crystal display element used in the liquid crystal display device according to the present invention. In FIG. 4, 120 is a segment electrode substrate, 110 is a common electrode substrate, 140 is a segment electrode, and 130 is a common electrode 170 is a sealing material. The common electrode substrate 110 is formed of a substantially rectangular transparent substrate made of glass or the like, and has a plurality of common electrodes 130 formed of strip-shaped transparent electrodes.
The segment electrode substrate 120 is also formed of a transparent substrate made of glass or the like, which is also substantially rectangular, and a segment electrode 140 made of a strip-shaped transparent electrode is formed on the segment electrode substrate.
Although not shown, a polarizing plate is provided outside the common electrode substrate 110 and the segment electrode substrate 120. 195 shows a region on the common electrode substrate 110 where the polarizing plate is provided.
In the liquid crystal display device shown in FIG. 4, the segment electrode substrate 120 and the common electrode substrate 110 are overlapped with a certain gap therebetween via a sealing material 170, and the sealing material is provided between the segment electrode substrate and the common electrode substrate. It is provided in a frame shape at the edge of the substrate, the sealing material, the segment electrode substrate, and the common electrode substrate form a container in which the two substrates are bonded together while maintaining the gap, and a liquid crystal is sealed therein. Assembled.
As shown in Fig.4, the common electrode and the segment electrode are orthogonal to each other, and the intersection of the common electrode and the segment electrode forms one pixel.
The common electrode 130 and the segment electrode 120 extend to the sides of the common electrode substrate 110 and the segment electrode substrate 120, respectively, and form external connection terminals 150 and 160 for electrically connecting to a drive circuit.
As described above, the liquid crystal display element 100 overlaps the substantially rectangular common electrode substrate 110 and the segment electrode substrate 120 such that the common electrode 130 and the segment electrode 120 intersect, and extends the common electrode and the segment electrode respectively. Since the external connection electrodes 150 and 160 are provided, as shown in FIG. 3, the driving ICs 200A, 200B and 250 for driving the liquid crystal display element and the printed circuit boards 600A, 600B and 610 are provided on at least two sides of the liquid crystal display element. It will be provided in the periphery. A flexible board 700 is used to electrically connect the printed circuit boards provided on these two sides.
Fig. 5 is a plan view of the flexible wiring board according to the present invention as viewed from the front, and Fig. 6 is a plan view of the flexible wiring board according to the present invention as viewed from the back. This flexible wiring board 700 is formed by forming wiring with conductors on a flexible board. In FIGS. 5 and 6, two layers of wiring 710 are formed on the front and back of the flexible board 760. Have been. Fig. 7 shows a cross-sectional view taken along the line BB 'in Fig. 6. The two-layered wiring 710 is connected to the printed circuit board by soldering at the terminal portion 720 by conducting between the two-layered wiring at the terminal portion 720. In the two-layer wiring, the arrangement of surrounding the high-frequency signal wiring 730 with the GND wiring 740 has an effect of preventing leakage of high-frequency noise and the like.
The power supply wiring 750 and the GND wiring 740 are wide to reduce the impedance of the wiring and allow a large amount of current to flow.
Fig.8 shows an enlarged perspective view of the corner formed by two adjacent sides of the liquid crystal display device of Fig.3. Fig.8 is a driving IC 200B, 250 in the liquid crystal display device 100 is mounted in the tape carrier method, connect the driving IC 200B, 250 to the printed circuit board 600B, 610, the rear surface of the printed circuit board 600B and 610, flexible The figure shows elements connected by a wiring board 700, holding a liquid crystal display element on which the drive circuit is mounted by a mold 800, and housed in an upper case 360 and a lower case 300.
In FIG. 8, first, there is a lower case 300 constituting a part of the outer frame of the liquid crystal display device. The lower case 300 has a box shape provided with a fixing portion 310 at a corner thereof for fixing the lower case 300 to an upper case described later.
Further, between the printed circuit board 610 and the liquid crystal display element 100, a common electrode drive circuit 250 made of, for example, a semiconductor IC formed by a tape carrier method is arranged, and the electrode terminals of the common electrode drive circuit 250 are On the one hand, it is connected to the external connection terminals 150 of the common board 110, and on the other hand, it is connected to the electrode terminals on the common side printed circuit board 610.
In addition, a segment-side printed circuit board 600B is arranged on a side of the segment substrate of the liquid crystal display element 100 on the side of the external connection terminal. Further, between the segment side printed circuit board 600B and the liquid crystal display element 100, a segment electrode driving circuit 200B composed of a semiconductor IC formed by, for example, a tape carrier method is disposed, and the electrode terminals of the segment electrode driving circuit 200B are arranged. Are connected to the external connection terminals 160 of the segment substrate 120 on one side.
Here, the printed circuit boards 610 and 600B are formed separately from each other, and their ends in the longitudinal direction are formed so as to contact the fixing portion 310 of the lower case 300. This is because if the area of each of the circuit boards 610 and 600B is secured to a predetermined value or more and the width thereof is reduced as much as possible, the length of the circuit board 610 or 600B is large enough to contact the fixing portion 310.
The printed circuit boards 610 and 600B need to be electrically connected, and the connection is made via the flexible wiring board 700. FIG. 8 shows a positional relationship before the flexible wiring board 700 is connected to the back surfaces of the circuit boards 610 and 600B for easy understanding. Actually, the flexible wiring board 700 is directly connected to the back surfaces of the circuit boards 610 and 600B.
Fig. 9 is a schematic enlarged view showing the arrangement of each part in section A in Fig. 3. For clarity the positional relationship between the flexible wiring board 700 and other components, and Fig.8 from the opposite side, are described as visible backside of the circuit board 610,600B. The flexible wiring substrate 700 is arranged so as not to abut on the fixing portion 310. However, the flexible wiring substrate 700 is formed to bend along the corner formed by the two sides of the liquid crystal display element 100, and a part thereof is It overlaps the non-display portion 180 of the display element 100.
The reason why the wiring of the flexible wiring board 700 is arranged so as to overlap with the liquid crystal display element is that the limited space between the fixed part 360 of the upper case 350 and the liquid crystal display element 100 close to the fixed part 360 is effectively used. This is because the above arrangement of the flexible wiring board 700 is most effective for use. However, the liquid crystal display element 100 has a display area 190, and if the flexible wiring board 700 overlaps the display area 190, the appearance as a display device is impaired. Therefore, it is necessary to prevent the flexible wiring board 700 from overlapping the display area 190. There is. Further, there is a region 195 where a polarizing plate is provided, and when the flexible wiring substrate 700 overlaps the region 195 where the polarizing plate is provided, the thickness of the liquid crystal display device increases so that the flexible wiring substrate 700 does not overlap the region 195 where the polarizing plate is provided. It is also necessary to Therefore, the width of the flexible wiring board 700 is limited, and the flexible wiring board 700 has a multilayer structure so that a large number of wirings can be provided in a narrow width.
Also, the corner 950, which is located on an extension of the circuit boards 610 and 600B, is not provided with the flexible wiring board 700 or the fixing portion 360 of the upper case 350, as shown in FIG. A display attachment 910 can be provided.
In addition, since the flexible wiring board 700 and the liquid crystal display element are arranged so as to overlap the mold 800 holding the liquid crystal display element, a part 810 of the mold 800 on which the flexible wiring board 700 is arranged has a thickness 810 of the flexible wiring board. Minutes have been deleted. FIG. 11 shows a mold 800 used in the present invention. Fig. 12 shows an enlarged view of part C in Fig. 11, and Fig. 13 shows a conventional example of the same part. The portion indicated by reference numeral 810 in FIG. 12 is deleted from the mold 830 of the conventional example, and the thickness of the mold is reduced by the thickness of the flexible wiring substrate 700 arranged so as to overlap the liquid crystal display element.
As is clear from the above description, according to the liquid crystal display device of the present invention, the flexible wiring board is arranged so as to overlap the liquid crystal display element. For this reason, the limited space between the fixed portion of the lower case and the liquid crystal display substrate adjacent to the fixed portion can be effectively used.
For this reason, it is not necessary to increase the space (width) between the liquid crystal display substrate and the frame wall of the lower case, so that the width can be made smaller than before.
[Industrial applicability]
According to the liquid crystal display device configured as described above, the connection wiring board is arranged such that the wiring at the corner of the liquid crystal display element overlaps the liquid crystal display element. A member can be provided. For this reason, a limited space between the liquid crystal display element and the liquid crystal display element close to the corner can be effectively used.
In addition, it is not necessary to increase the width of the frame of the liquid crystal display element and the case for accommodating the liquid crystal display element, so that the width can be reduced as compared with the conventional case.
Further, a mounting portion for mounting the liquid crystal display device can be provided at a corner of the liquid crystal display device on another external device on which the liquid crystal display device is mounted, so that the width of the mounting portion can be made smaller than before.

Claims (2)

液晶表示素子と、該液晶表示素子の隣接する少なくとも２辺に沿ってそれぞれ配置される第１の回路基板と、第２の回路基板と、上記液晶表示素子の２辺の作る角部において上記第１の回路基板と第２の回路基板とを電気的に接続させる配線基板と、上記液晶表示素子の２辺の作る角部の近傍において他の装置との取付け部とを有し、
上記配線基板は、上記液晶表示素子の２辺の作る角部に 沿うように曲がって形成され、該配線基板の一部が上記 角部と重なって配設され、上記他の装置との取付け部は上記第１の回路基板と第２の回路基板との延長線上の角部に設けられることを特徴とする液晶表示装置。A liquid crystal display element, a first circuit board disposed along at least two sides adjacent to the liquid crystal display element, a second circuit board, and a corner formed by the two sides of the liquid crystal display element. A wiring board for electrically connecting the first circuit board and the second circuit board, and a mounting portion for attaching another device in the vicinity of a corner formed by two sides of the liquid crystal display element;
The wiring substrate is formed bent along the corners make the 2 sides of the liquid crystal display device, a part of the wiring substrate is disposed to overlap with the corner portion, the attachment portion between the other device A liquid crystal display device provided at a corner on an extension of the first circuit board and the second circuit board. 液晶表示素子と、該液晶表示素子をその間に挟持し収納する上側ケースと下側ケースと、上記液晶表示素子を駆動し液晶表示素子の隣接する少なくとも２辺に沿ってそれぞれ配置されるプリント基板と、上記液晶表示素子の２辺の作る角部において上記プリント基板を電気的に接続するフレキシブル配線基板と、上記液晶表示素子の２辺の作る角部近傍において上記上側ケースと下側ケースとを固定する固定部と、他の装置との取付け部とを有し、
上記フレキシブル配線基板は、上記液晶表示素子の２辺の作る角部に沿うように曲がって形成され、該フレキシ ブル配線基板の一部が上記角部と重なって配設され、上記他の装置との取付け部と、上記固定部とは、上記２辺 に沿ってそれぞれ配置されるプリント基板の延長線上の角部に設けられることを特徴とする液晶表示装置。A liquid crystal display element, an upper case and a lower case that sandwich and house the liquid crystal display element therebetween, and a printed circuit board that drives the liquid crystal display element and is disposed along at least two adjacent sides of the liquid crystal display element. A flexible wiring board for electrically connecting the printed circuit board at a corner formed by the two sides of the liquid crystal display element; and an upper case and a lower case fixed near the corner formed by the two sides of the liquid crystal display element. Having a fixing part to be attached and a mounting part to another device,
The flexible wiring board is formed bent along the corners make the 2 sides of the liquid crystal display device, some of the flexibility Bull wiring board is disposed overlapping with the corner portion, and the other devices The liquid crystal display device, wherein the mounting portion and the fixing portion are provided at corners on an extension of a printed circuit board respectively arranged along the two sides .
JP53241697A 1996-03-11 1996-03-11 Liquid crystal display Expired - Lifetime JP3599348B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1996/000594 WO1997034189A1 (en) 1996-03-11 1996-03-11 Liquid crystal display

Publications (1)

Publication Number Publication Date
JP3599348B2 true JP3599348B2 (en) 2004-12-08

Family

ID=14153032

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53241697A Expired - Lifetime JP3599348B2 (en) 1996-03-11 1996-03-11 Liquid crystal display

Country Status (2)

Country Link
JP (1) JP3599348B2 (en)
WO (1) WO1997034189A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4544239B2 (en) * 1997-10-31 2010-09-15 セイコーエプソン株式会社 Electro-optical device and electronic apparatus

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5665680U (en) * 1979-10-25 1981-06-01
JPS62126860U (en) * 1986-02-03 1987-08-12
JPS63241523A (en) * 1987-03-30 1988-10-06 Toshiba Corp Substrate device for liquid crystal panel
JPH02259623A (en) * 1989-03-30 1990-10-22 Sharp Corp Liquid crystal display element
JP2995888B2 (en) * 1991-03-27 1999-12-27 セイコーエプソン株式会社 Liquid crystal display
JPH0580348A (en) * 1991-09-19 1993-04-02 Casio Comput Co Ltd Liquid crystal display module
JPH05119334A (en) * 1991-10-24 1993-05-18 Nec Corp Liquid crystal display device
JP3297084B2 (en) * 1992-07-24 2002-07-02 シチズン時計株式会社 Display device and its flexible substrate

Also Published As

Publication number Publication date
WO1997034189A1 (en) 1997-09-18

Similar Documents

Publication Publication Date Title
KR100246086B1 (en) Liquid crystal display device
US8212957B2 (en) Mount structure, illumination apparatus and liquid crystal apparatus
KR100546708B1 (en) Liquid Crystal Display Device
WO2006126376A1 (en) Liquid crystal display
JP3630116B2 (en) Electro-optic unit and electronic equipment
JPH10268783A (en) Picture display device
JPH10268272A (en) Liquid crystal display device
JP2003005158A (en) Liquid crystal display device
KR102420788B1 (en) display device
JP4642332B2 (en) Display device
JPH1026939A (en) Planar display device
JP3599348B2 (en) Liquid crystal display
JP2002148653A (en) Display device
JP3719362B2 (en) Display device and electronic device
KR102421508B1 (en) display device
JP2001075093A (en) Display device and electronic appliance using the device
JPH09211481A (en) Liquid crystal display device
JP4146679B2 (en) Liquid crystal display
JPH0815716A (en) Liquid crystal display device
JP2998744B2 (en) Panel block manufacturing method
JP3091725B2 (en) Liquid crystal display
JP3565998B2 (en) Liquid crystal display
JP3757671B2 (en) Display device and electronic device
JP3208640B2 (en) Liquid crystal display device and manufacturing method thereof
KR100529490B1 (en) LCD Display Module

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040511

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040707

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20040831

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20040914

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20070924

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080924

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080924

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090924

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090924

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100924

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100924

Year of fee payment: 6

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100924

Year of fee payment: 6

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100924

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110924

Year of fee payment: 7

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313115

S631 Written request for registration of reclamation of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313631

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110924

Year of fee payment: 7

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110924

Year of fee payment: 7

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313115

Free format text: JAPANESE INTERMEDIATE CODE: R313121

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110924

Year of fee payment: 7

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120924

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130924

Year of fee payment: 9

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term