JPS60243635A - How to repair defects in liquid crystal display devices - Google Patents
How to repair defects in liquid crystal display devicesInfo
- Publication number
- JPS60243635A JPS60243635A JP59099873A JP9987384A JPS60243635A JP S60243635 A JPS60243635 A JP S60243635A JP 59099873 A JP59099873 A JP 59099873A JP 9987384 A JP9987384 A JP 9987384A JP S60243635 A JPS60243635 A JP S60243635A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- pixel
- display devices
- repair defects
- 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
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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Liquid Crystal (AREA)
- Nonlinear Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、液晶表示装置に関するものであり、画集欠陥
部全修正して表示品質の向上を目的とするものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a liquid crystal display device, and its purpose is to improve display quality by correcting all defective portions of an image book.
液晶ディスプレイは、低電圧、低電力駆動が可能でアリ
、小型、薄型のフラットパネルディスプレイとして近年
急速に応用商品が拡大しつつあり１だＣＲ’ｒＶＣ代わ
りつる画像表示装置としても、注目を集めている。液晶
ディスプレイの駆動方式として線、時分割駆動方式と、
アクティブマトリックス駆動方式があるが、この両方式
にてすでに小型の液晶テレビが発売あるいは試作品の発
表がされている。１だ液晶パネルと、カラーフィルタを
組み合わせることにより、鮮やかなフルカラー液晶テレ
ビも試作発表されている。今後、液晶ティスプレィは、
小型で薄型であるフラットディスプレイとして、幅広い
応用が考えられる。Liquid crystal displays can be driven at low voltages and with low power, and the number of applied products has been rapidly expanding in recent years as small, thin flat panel displays.In addition, they are also attracting attention as an image display device that can replace CR'rVC. There is. Line and time-division drive methods are used as driving methods for liquid crystal displays.
There is an active matrix drive method, and small LCD TVs using both methods have already been released or prototypes have been announced. A prototype full-color LCD TV with vivid colors has been announced by combining a single LCD panel with a color filter. In the future, LCD displays will
A wide range of applications can be considered as a small and thin flat display.
アクティブマトリックス液晶表示装置は、マトリックス
状に存在する画素電極の各々に対応するスイッチング素
子が形成されており、このスイッチング素子により、画
素電極に必要な電荷全充放電して、液晶を駆動するもの
である。In an active matrix liquid crystal display device, a switching element is formed that corresponds to each of the pixel electrodes that are arranged in a matrix, and this switching element fully charges and discharges the necessary charge to the pixel electrode to drive the liquid crystal. be.
上記の構成において、画像を表示するために、スイッチ
ング素子と画素を極は、数万個以上、形成する必要があ
ジ、その様に多数個全形成していく過程では、工程中の
なんらかの原因によってスイツチング素子が動作しない
あるいは、画素駆動電極が正常に形成されていないこと
により液晶を駆動できない箇所が発生する。In the above configuration, in order to display an image, it is necessary to form tens of thousands of switching elements and pixels. Therefore, the switching element does not operate, or the pixel drive electrode is not formed properly, resulting in a portion where the liquid crystal cannot be driven.
従来これらの画素欠陥部は、修正の方法がなく第１図の
欠陥部分１のように特異な表示点になり歩留り低下やコ
ストアップの要因となっていた。Conventionally, there is no way to correct these pixel defective areas, resulting in a peculiar display point like the defective area 1 in FIG. 1, which causes a decrease in yield and an increase in cost.
本発明は、か刀為る従来の画素欠陥部分ヶ、修正し表示
品質の向上を計るだめの発明である。The present invention is intended to improve display quality by correcting existing pixel defects.
不発明の特徴は、画素欠陥部の液晶層の配向を乱し、欠
陥部の画素を駆動時と非点灯時の中間状態にして、元の
透過量を中間調にし、画像表示状態において欠陥部分を
めだたなくすることである。The feature of the invention is that the orientation of the liquid crystal layer in the defective pixel area is disturbed, the pixel in the defective area is placed in an intermediate state between when it is activated and when it is not lit, and the original transmission amount is made into an intermediate tone, so that the defective area is not affected in the image display state. The goal is to make it less noticeable.
第６図に不発明による実施例を示す。不実施例は、画素
欠陥部１にレーザ光１１を照射して、液晶の配向全乱す
ものである。レーザ光の照射スポットは第４図のスポッ
ト４に示す形状で行う。上記のようにレーザ光を照射す
ると、照射された部分の配向膜８や画素電極材７が焼か
れ液晶Ｎｉ１゜に対する配回規制力が失なわれ、その部
分の液晶分子の配列がランダムになり、光の透過量全コ
ントロールすることができる。FIG. 6 shows an embodiment according to the invention. In the non-example, the pixel defective portion 1 is irradiated with laser light 11 to completely disturb the orientation of the liquid crystal. The laser beam irradiation spot has the shape shown in spot 4 in FIG. 4. When the laser beam is irradiated as described above, the alignment film 8 and pixel electrode material 7 in the irradiated area are burned, the alignment regulating force for the liquid crystal Ni1° is lost, and the alignment of the liquid crystal molecules in that area becomes random. , the amount of light transmitted can be completely controlled.
また、第５図に示すようにレーザ光の照射スポットをス
ポット５．６のように小さくして画素電極内の位置およ
び数を変化させることにより画素の光透過ｔを任意に変
えることができる。Further, as shown in FIG. 5, the light transmission t of the pixel can be arbitrarily changed by making the laser beam irradiation spot as small as spot 5.6 and changing the position and number within the pixel electrode.
このようにすると第２図に示すように欠陥部分を周囲の
状態に対して修正画素６のようにめだたなくすることが
でき、製造工程における歩留り向上を計り、コスト低減
全針ることができる。In this way, as shown in FIG. 2, the defective portion can be made inconspicuous with respect to the surrounding conditions like the corrected pixel 6, and the yield in the manufacturing process can be improved and costs can be reduced overall.
不発明は、アクティブマトリックス液晶表示装置におい
ては不可避な画素欠陥を救済する方法に関するもので、
有効な方法である。The invention relates to a method for remediating pixel defects that are inevitable in active matrix liquid crystal display devices.
This is an effective method.
第１図は、従来の画素欠陥例
第２図は、修正された画素欠陥例
８３図は、本発明による修正方法例
第４図は、不発明による修正方法例
第５図は、不発明による修正方法例
１・・・画素欠陥 ２・・・正常な画素３・・・修正さ
れた画素欠陥
４・・・レーザスポット
５・・・レーザスポット
６・・・レーザスポット
７・・・画素電極 ８・・・配向膜
９・・・対向基板 １０・・・液晶層
１１・・・レーザ光
１２・・・アクティブマトリックス基板以 上
出願人 株式会社諏訪精工舎
代理人 弁理士 最 上 務
第１図
第２図
第３図
第４図
第５図FIG. 1 shows an example of a conventional pixel defect. FIG. 2 shows an example of a corrected pixel defect. 83 FIG. 4 shows an example of a correction method according to the present invention. FIG. Correction method example 1... Pixel defect 2... Normal pixel 3... Corrected pixel defect 4... Laser spot 5... Laser spot 6... Laser spot 7... Pixel electrode 8 ...Alignment film 9...Counter substrate 10...Liquid crystal layer 11...Laser light 12...Active matrix substrate and above Applicant Suwa Seikosha Co., Ltd. Agent Patent Attorney Mogami Tsutomu Figure 1 Figure 2 Figure 3 Figure 4 Figure 5
Claims (1)
別の基板間に液晶ｉ＃ヲはさんだアクティブマトリック
ス液晶表示装置において、該装置内に存在する画素欠陥
部の液晶層の配向を乱すことを特徴とする液晶表示装置
の欠陥修正方法。A substrate with switching elements formed in a matrix,
1. A method for correcting a defect in a liquid crystal display device, which comprises disrupting the orientation of a liquid crystal layer in a defective pixel portion of an active matrix liquid crystal display device in which a liquid crystal i# is sandwiched between separate substrates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59099873A JPS60243635A (en) | 1984-05-18 | 1984-05-18 | How to repair defects in liquid crystal display devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59099873A JPS60243635A (en) | 1984-05-18 | 1984-05-18 | How to repair defects in liquid crystal display devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60243635A true JPS60243635A (en) | 1985-12-03 |
Family
ID=14258923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59099873A Pending JPS60243635A (en) | 1984-05-18 | 1984-05-18 | How to repair defects in liquid crystal display devices |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60243635A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5142386A (en) * | 1989-06-19 | 1992-08-25 | Nec Corporation | Device and method for reducing the observability of a defective pixel in an lcd |
| EP0501837A2 (en) * | 1991-03-01 | 1992-09-02 | Sharp Kabushiki Kaisha | A liquid crystal display device and a method of compensating for a defect of a liquid crystal panel of the liquid crystal display device |
| EP0640864A2 (en) * | 1993-08-25 | 1995-03-01 | Kabushiki Kaisha Toshiba | Liquid crystal display apparatus and fabrication method thereof |
| US5638199A (en) * | 1993-12-24 | 1997-06-10 | Sharp Kabushiki Kaisha | Liquid crystal display device and method for repairing defective portions thereof |
| US5926246A (en) * | 1994-11-15 | 1999-07-20 | Sharp Kabushiki Kaisha | Method for the correction of a defect in a liquid crystal display device |
| JP2006337842A (en) * | 2005-06-03 | 2006-12-14 | Toshiba Corp | Repairing method and repairing apparatus of liquid crystal panel |
| US7440074B2 (en) | 2004-09-06 | 2008-10-21 | Seiko Epson Corporation | Method for repair of liquid crystal display device light point defects using detection of corrective laser light in real time |
| US7692739B2 (en) | 2005-07-14 | 2010-04-06 | Kabushiki Kaisha Toshiba | Liquid crystal panel and method of repairing same |
-
1984
- 1984-05-18 JP JP59099873A patent/JPS60243635A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5142386A (en) * | 1989-06-19 | 1992-08-25 | Nec Corporation | Device and method for reducing the observability of a defective pixel in an lcd |
| EP0501837A2 (en) * | 1991-03-01 | 1992-09-02 | Sharp Kabushiki Kaisha | A liquid crystal display device and a method of compensating for a defect of a liquid crystal panel of the liquid crystal display device |
| US5280374A (en) * | 1991-03-01 | 1994-01-18 | Sharp Kabushiki Kaisha | Liquid crystal display device and method of compensating for a defect |
| EP0640864A2 (en) * | 1993-08-25 | 1995-03-01 | Kabushiki Kaisha Toshiba | Liquid crystal display apparatus and fabrication method thereof |
| EP0640864A3 (en) * | 1993-08-25 | 1995-08-30 | Toshiba Kk | Liquid crystal display apparatus and fabrication method thereof. |
| US5636042A (en) * | 1993-08-25 | 1997-06-03 | Kabushiki Kaisha Toshiba | Liquid crystal display apparatus and fabrication method thereof |
| US5638199A (en) * | 1993-12-24 | 1997-06-10 | Sharp Kabushiki Kaisha | Liquid crystal display device and method for repairing defective portions thereof |
| US5926246A (en) * | 1994-11-15 | 1999-07-20 | Sharp Kabushiki Kaisha | Method for the correction of a defect in a liquid crystal display device |
| US7440074B2 (en) | 2004-09-06 | 2008-10-21 | Seiko Epson Corporation | Method for repair of liquid crystal display device light point defects using detection of corrective laser light in real time |
| JP2006337842A (en) * | 2005-06-03 | 2006-12-14 | Toshiba Corp | Repairing method and repairing apparatus of liquid crystal panel |
| JP4723915B2 (en) * | 2005-06-03 | 2011-07-13 | 株式会社東芝 | Method and apparatus for repairing liquid crystal panel |
| US8045132B2 (en) | 2005-06-03 | 2011-10-25 | Kabushiki Kaisha Toshiba | Method and apparatus for repairing a liquid crystal panel |
| US7692739B2 (en) | 2005-07-14 | 2010-04-06 | Kabushiki Kaisha Toshiba | Liquid crystal panel and method of repairing same |
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