JPH05113773A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH05113773A JPH05113773A JP27517391A JP27517391A JPH05113773A JP H05113773 A JPH05113773 A JP H05113773A JP 27517391 A JP27517391 A JP 27517391A JP 27517391 A JP27517391 A JP 27517391A JP H05113773 A JPH05113773 A JP H05113773A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- wiring
- display device
- electrode
- 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
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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
-
- 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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136204—Arrangements to prevent high voltage or static electricity failures
-
- 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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136259—Repairing; Defects
- G02F1/136272—Auxiliary lines
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
(57)【要約】
【目的】 本発明は液晶表示デバイスに関するもので、
静電気によるデバイスの劣化を防止しつつ、断線救済を
おこなうことができ、高歩留り、低コスト、表示品位の
優れた液晶表示デバイスを提供することを目的とする。
【構成】液晶表示デバイスにおいて駆動回路が接続され
ない側の信号配線電極３１に近接した領域に駆動回路を
具備したプリント基板２９内のある電位にＴＡＢ配線２
６を介して接続された補助信号配線３２を有した構成を
持つ。また、信号配線に断線が生じた場合は、補助配線
３２で救済し得る構造となっている。
(57) [Summary] [Object] The present invention relates to a liquid crystal display device,
An object of the present invention is to provide a liquid crystal display device capable of performing wire breakage relief while preventing deterioration of the device due to static electricity, high yield, low cost, and excellent display quality. [Structure] In a liquid crystal display device, a TAB wiring 2 is provided at a certain potential in a printed circuit board 29 having a driving circuit in a region close to a signal wiring electrode 31 on a side to which the driving circuit is not connected.
It has a configuration having an auxiliary signal wiring 32 connected via 6. Further, when the signal wiring is broken, the auxiliary wiring 32 can be used for relief.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高性能、高歩留まりの
液晶表示表示デバイスに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high performance, high yield liquid crystal display device.
【０００２】[0002]
【従来の技術】近年、液晶表示装置は特に画像表示に代
表される大容量表示に向けてのアプローチが活発であ
り、低価格デバイスが実現出来るディスプレイとして最
も注目されている。2. Description of the Related Art In recent years, a liquid crystal display device has been actively approached for a large-capacity display represented by an image display, and has attracted the most attention as a display capable of realizing a low cost device.
【０００３】（図３）は従来の液晶表示デバイスの一例
で、マトリクス型液晶表示装置の等価回路を示す図であ
る。FIG. 3 is an example of a conventional liquid crystal display device and is a diagram showing an equivalent circuit of a matrix type liquid crystal display device.
【０００４】以下、（図３）について説明する。スイッ
チング素子群１と画素電極群２と信号配線電極群（映像
信号線４ａ,走査信号線４ｂ）からなる画像表示領域５
と外部駆動回路からの信号入力電極群６を有した透明な
絶縁基板７からなるアレイ基板と、透明共通電極と遮光
層とを有した透明な絶縁基板からなる対向基板にガラス
ファイバー或いは樹脂微粒子からなるスペーサーを設
け、画素電極２と透明共通電極を対向させて樹脂接着剤
にて貼合わせ、スペーサーにより形成された間隙に液晶
組成物を充填して液晶パネルを形成する。この液晶パネ
ル上の信号入力電極６と信号配線８’と集積回路などか
らなる駆動電気回路８を有したプリント基板９とを電気
的に接続する配線群（以下、ＴＡＢ）１０から構成され
ていた。（例えば、回路例として”液晶表示装置エレク
トロニクスの基礎と応用”佐々木昭夫編）。Hereinafter, (FIG. 3) will be described. An image display area 5 including a switching element group 1, a pixel electrode group 2, and a signal wiring electrode group (video signal line 4a, scanning signal line 4b)
And an array substrate composed of a transparent insulating substrate 7 having a signal input electrode group 6 from an external drive circuit and a transparent insulating substrate having a transparent common electrode and a light-shielding layer. A spacer is formed, the pixel electrode 2 and the transparent common electrode are opposed to each other and are bonded with a resin adhesive, and the gap formed by the spacer is filled with a liquid crystal composition to form a liquid crystal panel. The wiring group (hereinafter referred to as TAB) 10 electrically connects the signal input electrode 6 on the liquid crystal panel, the signal wiring 8 ′, and the printed circuit board 9 having the driving electric circuit 8 including an integrated circuit. . (For example, as a circuit example, "Basics and Applications of Liquid Crystal Display Electronics" by Akio Sasaki).
【０００５】以上のように構成された液晶表示デバイス
は、これらの画素電極群２にスイッチング素子１を介し
て選択的に電圧を印加することにより任意の情報を表示
することが出来る。The liquid crystal display device configured as described above can display arbitrary information by selectively applying a voltage to the pixel electrode group 2 through the switching element 1.
【０００６】[0006]
【発明が解決しようとする課題】従来の液晶表示デバイ
スの構造では走査信号線の片側はＴＡＢ１０が実装さ
れ、プリント基板と液晶パネルとの電気的な接続がなさ
れていた。しかし、他方１１は実装されず、液晶パネル
の欠陥検査の目的で、対向基板の外側に走査信号線の電
極を表面に露出しておかなければならない。これは液晶
パネルの製造中、ＴＡＢ実装中、プリント基板の接続中
に発生する静電気によって、解放された走査信号線電極
１１に高電圧１２が突入し、液晶パネル上のスイッチン
グ素子や画像表示領域内で交差する信号線間の短絡、ま
た、プリント基板上に接続された電子部品に悪影響を与
え、表示欠陥となった。In the structure of the conventional liquid crystal display device, the TAB 10 is mounted on one side of the scanning signal line to electrically connect the printed circuit board and the liquid crystal panel. However, the other 11 is not mounted, and the electrodes of the scanning signal lines must be exposed on the surface outside the counter substrate for the purpose of defect inspection of the liquid crystal panel. This is because a high voltage 12 rushes into the released scanning signal line electrode 11 due to static electricity generated during the manufacturing of the liquid crystal panel, the mounting of the TAB, and the connection of the printed circuit board, which causes a switching element on the liquid crystal panel or an image display area. This caused a short circuit between the signal lines intersecting with each other and adversely affected the electronic components connected on the printed circuit board, resulting in a display defect.
【０００７】そこで本発明は、断線の救済をおこないつ
つ、上記の欠点を解消し、かつ、生産歩留りと製品のコ
ストを大幅に向上し、表示品位の優れた液晶表示デバイ
スを提供することを目的とするものである。Therefore, an object of the present invention is to provide a liquid crystal display device which eliminates the above-mentioned drawbacks while relieving a wire breakage, greatly improves the production yield and the cost of the product, and has an excellent display quality. Is to
【０００８】[0008]
【課題を解決するための手段】前記目的を達成するため
に本発明は、スイッチング素子群とこれらを形成する配
線電極群を有する基板（アレイ基板）上で上記配線群が
接続されない基板上領域に導電性材料からなる補助配線
を具備し、かつ、上記配線が駆動回路の固定電位に電気
的に接続する構成とするものである。In order to achieve the above object, the present invention provides a substrate (array substrate) having a switching element group and a wiring electrode group forming the switching element group in an area on the substrate where the wiring group is not connected. The auxiliary wiring made of a conductive material is provided, and the wiring is electrically connected to the fixed potential of the drive circuit.
【０００９】さらに、本発明では、アレイ基板の欠陥検
査後、画像信号線および走査信号線の断線救済を目的と
した補助信号線を前記目的のために併用して使用できる
ことが可能な構成とするものである。Further, according to the present invention, after the defect inspection of the array substrate, the auxiliary signal line for the purpose of relieving the disconnection of the image signal line and the scanning signal line can be used together for the above purpose. It is a thing.
【００１０】[0010]
【作用】前記のように構成された液晶表示デバイスで
は、ＴＡＢ実装されない側の電極の近接した領域が固定
電位によってシールドすることによって静電気の突入を
防止しできる。しかも、従来どおり断線の救済をおこな
いつつ、パネル組立工程、ＴＡＢ実装工程、および、プ
リント基板接続工程で静電気による不良の発生を完全に
抑えることができた。これによって、液晶表示デバイス
の歩留り、コストダウンを図ることができ、表示性能を
飛躍的に向上することができた。In the liquid crystal display device configured as described above, static electricity can be prevented from entering by shielding the area close to the electrode on the side where TAB is not mounted with a fixed potential. Moreover, it is possible to completely suppress the occurrence of defects due to static electricity in the panel assembly process, the TAB mounting process, and the printed circuit board connecting process while repairing the disconnection as in the conventional case. As a result, the yield and cost of the liquid crystal display device can be reduced, and the display performance can be dramatically improved.
【００１１】[0011]
【実施例】以下本発明の実施例について説明する。（図
１）は本発明の１実施例の液晶表示デバイスのアレイ基
板の断面構成図である。非晶質珪素を半導体とした薄膜
トランジスタ（ＴＦＴ）からなるスイッチング素子群２
１とインジウム−錫酸化物（以下ＩＴＯ）からなる画素
電極群２２と走査信号配線２４ｂとしてアルミニウムと
クロムの２層構造、電極としてアルミニウムとチタンの
２層構造からなる画像信号配線電極群２４ａからなる画
像表示領域２５と上記信号配線電極と同様な構成をもつ
外部駆動回路からの信号入力電極群２６とアルミニウム
とチタンからなる補助配線群３２を具備したガラス基板
２７からなる。EXAMPLES Examples of the present invention will be described below. FIG. 1 is a cross-sectional configuration diagram of an array substrate of a liquid crystal display device according to one embodiment of the present invention. Switching element group 2 composed of thin film transistors (TFTs) using amorphous silicon as a semiconductor
1 and a pixel electrode group 22 made of indium-tin oxide (hereinafter referred to as ITO), a scanning signal wiring 24b having a two-layer structure of aluminum and chromium, and an electrode having an image signal wiring electrode group 24a having a two-layer structure of aluminum and titanium. The glass substrate 27 is provided with an image display area 25, a signal input electrode group 26 from an external drive circuit having the same structure as the signal wiring electrodes, and an auxiliary wiring group 32 made of aluminum and titanium.
【００１２】ここで、ＴＦＴのゲート絶縁膜２３として
酸化タンタルと窒化シリコンの２層を用いた。さらに、
ＴＦＴの上層に窒化シリコン膜２３’を設けた。前記ア
レイ基板に、ＩＴＯからなる透明共通電極とクロムによ
って形成されたブラックストライプ層とポリイミド配向
膜を有したガラス基板からなる対向基板と、ガラスファ
イバー或いは樹脂微粒子からなるスペーサーを設け、上
記アレイ基板の画素電極２２と上記透明共通電極を対向
させて樹脂接着剤にて貼合わせ、スペーサーにより形成
された間隙に液晶組成物を充填し、液晶パネルを形成し
た。ここで、液晶はＴＮ型を用いた。Here, two layers of tantalum oxide and silicon nitride were used as the gate insulating film 23 of the TFT. further,
A silicon nitride film 23 'was provided on the upper layer of the TFT. The array substrate is provided with a transparent common electrode made of ITO, a counter substrate made of a glass substrate having a black stripe layer formed of chromium and a polyimide alignment film, and a spacer made of glass fibers or resin fine particles. The liquid crystal panel was formed by facing the pixel electrode 22 and the transparent common electrode and bonding them with a resin adhesive, and filling the gap formed by the spacer with the liquid crystal composition. Here, TN type liquid crystal was used.
【００１３】（図２）は、本発明の１実施例の液晶表示
デバイスの等価回路図を示している。画像表示領域２５
では互いに直交するソース電極である画像信号配線２４
ａとゲート電極である走査信号配線２４ｂなどからなっ
ている。ここではＴＦＴは２１および画素電極は２２で
ある。さらに、液晶パネルを駆動する集積回路２８と信
号配線２８’などからなるプリント基板２９と前記液晶
パネルとＴＡＢ配線３０で電気的に接続した。さらに、
ＴＡＢ配線内に補助配線群３２と前記プリント基板２９
上の信号配線の１つである接地線と接続できる配線２
６’を設け、ＴＡＢ実装の際に同時に接続が可能とし
た。 以上のように構成された液晶表示デバイスの動作
は従来と同様である。FIG. 2 shows an equivalent circuit diagram of the liquid crystal display device of one embodiment of the present invention. Image display area 25
Then, the image signal wirings 24 which are source electrodes orthogonal to each other
and a scanning signal wiring 24b which is a gate electrode. Here, the TFT is 21 and the pixel electrode is 22. Further, a printed circuit board 29 including an integrated circuit 28 for driving the liquid crystal panel and the signal wiring 28 'was electrically connected to the liquid crystal panel by the TAB wiring 30. further,
Auxiliary wiring group 32 and the printed circuit board 29 in the TAB wiring
Wiring 2 that can be connected to the ground wire, which is one of the signal wires above
6'is provided so that the connection can be made at the same time when the TAB is mounted. The operation of the liquid crystal display device configured as described above is the same as the conventional one.
【００１４】なお、補助配線の接続は、パネル組立工程
では対向基板の透明電極ＩＴＯと電気的に接続されてい
る。また、ＴＡＢ実装において、プリント基板内に設け
た対向電位の信号線と接続しても良い。The auxiliary wiring is electrically connected to the transparent electrode ITO of the counter substrate in the panel assembling process. Further, in the TAB mounting, it may be connected to a signal line of an opposite potential provided in the printed board.
【００１５】次に、断線救済との関係について説明す
る。例えば、ゲート配線Ａ−Ａ’が３３で断線が生じた
場合、ゲート電極の両端であるＡ、Ａ’と補助配線電極
３２とをワイヤー・ボンディングによって電気的に接続
（３４ａ，３４ｂ）し、さらに、ＴＡＢ配線と補助配線
電極との接続３５をレーザー光線によって切断した。こ
の場合、補助配線３２の電位がゲート信号に固定した。Next, the relationship with the disconnection relief will be described. For example, when the gate wiring A-A 'is broken at 33, A and A', which are both ends of the gate electrode, and the auxiliary wiring electrode 32 are electrically connected by wire bonding (34a, 34b), and further, The connection 35 between the TAB wiring and the auxiliary wiring electrode was cut by a laser beam. In this case, the potential of the auxiliary wiring 32 was fixed to the gate signal.
【００１６】以上のように本発明は、静電気の突入によ
るデバイスの劣化を解消し、断線の救済をおこない、表
示品質の優れた設計に変更することができた。As described above, according to the present invention, it is possible to eliminate the deterioration of the device due to the rush of static electricity, relieve the disconnection, and change the design to the one having the excellent display quality.
【００１７】これによって、液晶表示デバイスの歩留
り、表示性能を飛躍的に向上することが確認できた。By this, it was confirmed that the yield and display performance of the liquid crystal display device were dramatically improved.
【図１】本発明の１実施例の液晶表示デバイスのアレイ
基板の断面構成図である。FIG. 1 is a cross-sectional configuration diagram of an array substrate of a liquid crystal display device according to an embodiment of the present invention.
【図２】本発明の１実施例の液晶表示デバイスの等価回
路図である。FIG. 2 is an equivalent circuit diagram of a liquid crystal display device of one embodiment of the present invention.
【図３】従来の液晶表示デバイスの等価回路図である。FIG. 3 is an equivalent circuit diagram of a conventional liquid crystal display device.
２１ ＴＦＴ ２２ 画素電極 ２３ ゲート絶縁膜 ２３’ 保護膜 ２４ａ ソース信号配線 ２４ｂ ゲート信号配線 ２６ 信号入力電極 ２７ ガラス基板 ２９ プリント基板 ３０ ＴＡＢ配線 ３２ 補助配線 21 TFT 22 Pixel Electrode 23 Gate Insulating Film 23 'Protective Film 24a Source Signal Wiring 24b Gate Signal Wiring 26 Signal Input Electrode 27 Glass Substrate 29 Printed Circuit Board 30 TAB Wiring 32 Auxiliary Wiring
Claims (4)
群とこれらを形成する配線電極群とからなるマトリック
ス状の画像表示領域を有する基板とが、それぞれの電極
面側が互いに向かい合い、かつ、所定の間隙を保ちつつ
配置され、その間隙内に液晶組成物を充填してなる液晶
表示パネルと、駆動回路を実装したプリント基板と上記
液晶表示パネルとを電気的に接続する配線群から構成さ
れ、上記液晶表示パネル上で上記配線群が接続されない
基板上領域に導電性材料からなる補助配線を具備し、上
記補助配線が駆動回路の固定電位に電気的に接続する構
成であることを特徴とする液晶表示デバイス。1. A substrate having a transparent electrode-equipped substrate and a substrate having a matrix-shaped image display region composed of a switching element group and a wiring electrode group forming the switching element group face each other, and have a predetermined shape. A liquid crystal display panel which is arranged with a gap maintained and is filled with a liquid crystal composition, a printed circuit board on which a drive circuit is mounted, and a wiring group which electrically connects the liquid crystal display panel to each other. A liquid crystal having a configuration in which an auxiliary wiring made of a conductive material is provided in a region on the substrate where the wiring group is not connected on the liquid crystal display panel, and the auxiliary wiring is electrically connected to a fixed potential of a drive circuit. Display device.
域を構成する電極の断線欠陥の救済用として用いる電極
配線であることを特徴とする請求項１記載の液晶表示デ
バイス。2. The liquid crystal display device according to claim 1, wherein the auxiliary wiring is an electrode wiring used for relieving a disconnection defect of an electrode forming a matrix-shaped image display area.
ら形成されていることを特徴とする請求項１記載の液晶
表示デバイス。3. The liquid crystal display device according to claim 1, wherein the switching element is formed of a thin film transistor.
構造またはダイオード構造など２端子回路からなること
を特徴とする請求項１記載の液晶表示デバイス。4. The liquid crystal display device according to claim 1, wherein the switching element has a two-terminal circuit such as a metal-insulator-metal structure or a diode structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27517391A JP3213986B2 (en) | 1991-10-23 | 1991-10-23 | Method for manufacturing array substrate for liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27517391A JP3213986B2 (en) | 1991-10-23 | 1991-10-23 | Method for manufacturing array substrate for liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05113773A true JPH05113773A (en) | 1993-05-07 |
| JP3213986B2 JP3213986B2 (en) | 2001-10-02 |
Family
ID=17551689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27517391A Expired - Fee Related JP3213986B2 (en) | 1991-10-23 | 1991-10-23 | Method for manufacturing array substrate for liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3213986B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100407032C (en) * | 2005-09-01 | 2008-07-30 | 友达光电股份有限公司 | Active matrix substrate and repair method thereof |
-
1991
- 1991-10-23 JP JP27517391A patent/JP3213986B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100407032C (en) * | 2005-09-01 | 2008-07-30 | 友达光电股份有限公司 | Active matrix substrate and repair method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3213986B2 (en) | 2001-10-02 |
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