JPH09244020A - Liquid crystal display device and defect correcting method therefor - Google Patents
Liquid crystal display device and defect correcting method thereforInfo
- Publication number
- JPH09244020A JPH09244020A JP5025596A JP5025596A JPH09244020A JP H09244020 A JPH09244020 A JP H09244020A JP 5025596 A JP5025596 A JP 5025596A JP 5025596 A JP5025596 A JP 5025596A JP H09244020 A JPH09244020 A JP H09244020A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- display device
- opaque
- defect
- 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.)
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- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は液晶表示装置および
その欠陥修正方法に関し、更に詳しくは、液晶表示装置
に形成される輝点欠陥を不透明遮光膜によって減点欠陥
に変換することにより良好な表示品質を確保した液晶表
示装置およびその欠陥修正方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and a defect repairing method therefor, and more particularly to a good display quality by converting a bright spot defect formed in a liquid crystal display device into a demerit defect by an opaque light-shielding film. And a defect repairing method thereof.
【０００２】[0002]
【従来の技術】液晶表示装置はフラットな構造や低消費
電力に特徴があり、ラップトップパソコンに代表される
液晶ディスプレイ付機器、テレビ等へと実用化され普及
しつつある。本発明に係わる液晶表示装置の基本的な構
成を図４に示して説明する。図４における液晶表示装置
１は、対向基板２および駆動基板３から大略構成され
る。対向基板２には、カラーフィルタＣＦ（カラー液晶
パネルの場合）やブラックマトリクスＢＭおよび透明電
極２Ａが形成されている。駆動基板３には、各画像制御
用の薄膜トランジスタ(Thin Film Transistor:以下、単
に「ＴＦＴ」と記す）や透明電極３Ａが形成されてい
る。かかる構造を有する液晶表示装置はアクティブマト
リクス型と呼ばれる。なお、本発明の対象となる液晶表
示装置はこの構造に限られるものではなく、単に例示し
たにすぎない。2. Description of the Related Art Liquid crystal display devices are characterized by a flat structure and low power consumption, and are being put to practical use and becoming widespread in devices with a liquid crystal display typified by laptop personal computers and televisions. The basic configuration of the liquid crystal display device according to the present invention will be described with reference to FIG. The liquid crystal display device 1 in FIG. 4 is generally composed of a counter substrate 2 and a drive substrate 3. A color filter CF (in the case of a color liquid crystal panel), a black matrix BM, and a transparent electrode 2A are formed on the counter substrate 2. A thin film transistor (hereinafter, simply referred to as “TFT”) for controlling each image and a transparent electrode 3A are formed on the drive substrate 3. A liquid crystal display device having such a structure is called an active matrix type. The liquid crystal display device which is the object of the present invention is not limited to this structure and is merely an example.
【０００３】２枚のガラス基板は、所定の間隔をもって
対向配置されるとともに、スペーサ４を挟持してシール
材５によって接合されている。すなわち、液晶表示装置
１はスペーサ４によってセルギャップを保ったのち、液
晶の注入孔を確保してシール材５で周囲を接着する。な
お、比較的小型の液晶表示装置ではスペーサ４を挟持せ
ずにシール材５のみでセルギャップを保つ場合もある。
そして、図示を省略した注入孔から液晶を注入して液晶
層６を形成し、これらガラス基板の両面に２枚の偏光板
（図示省略）を一体に積層することにより、上記構成の
液晶セルが完成される。完成された液晶セルはテスト回
路に接続され、各画素部の駆動チェック等がなされて液
晶表示装置１が完成される。The two glass substrates are arranged to face each other with a predetermined gap therebetween, and are joined by a seal material 5 with a spacer 4 sandwiched therebetween. That is, in the liquid crystal display device 1, after maintaining the cell gap by the spacer 4, the liquid crystal injection hole is secured and the periphery is adhered by the sealing material 5. In a relatively small liquid crystal display device, the cell gap may be maintained only by the sealing material 5 without sandwiching the spacer 4.
Then, a liquid crystal is injected from an injection hole (not shown) to form a liquid crystal layer 6, and two polarizing plates (not shown) are integrally laminated on both surfaces of these glass substrates, whereby the liquid crystal cell having the above-mentioned configuration is formed. Will be completed. The completed liquid crystal cell is connected to a test circuit, and driving check of each pixel portion is performed to complete the liquid crystal display device 1.
【０００４】このような構成の液晶表示素子の動作を簡
潔に説明するならば、前述の対向基板２や駆動基板３に
形成された配向膜（図示省略）には所定の手段によって
ラビング処理がなされ、液晶層６はこのラビングの作用
により９０度捩じれて配向する。液晶層６は旋光性を有
しており、電圧を印加しない状態ではバックライト（図
示省略）が照射した光は液晶セル内の液晶分子軸に沿っ
て伝搬し、偏波面が９０度回転する。この旋光方向に沿
って２枚の偏光板が直交配置され（ノーマリーホワイト
方式）、入射した光はそのまま液晶セル内を透過して対
向基板２に形成されたカラーフィルタＣＦに応じた発色
を行う。液晶６に閾値以上の電圧を印加すると、液晶６
は電圧方向（両ガラス基板の方向）に揃って立ち、旋光
性が失われて光は遮断されて黒表示がなされる。To briefly explain the operation of the liquid crystal display device having such a structure, the alignment film (not shown) formed on the counter substrate 2 or the drive substrate 3 is subjected to a rubbing process by a predetermined means. The liquid crystal layer 6 is twisted and oriented by 90 degrees by the action of this rubbing. The liquid crystal layer 6 has optical rotatory power, and when no voltage is applied, the light emitted by the backlight (not shown) propagates along the liquid crystal molecule axis in the liquid crystal cell, and the plane of polarization rotates 90 degrees. Two polarizing plates are arranged orthogonally along this optical rotation direction (normally white method), and the incident light is transmitted through the liquid crystal cell as it is to perform color development according to the color filter CF formed on the counter substrate 2. . When a voltage above the threshold value is applied to the liquid crystal 6, the liquid crystal 6
Are aligned in the voltage direction (direction of both glass substrates), the optical activity is lost, light is blocked, and black display is performed.
【０００５】ところで、このような液晶表示装置におい
ては、ＴＦＴの破壊や電圧印加ラインの短絡等が生じる
と、常に偏光板を光が透過してしまういわゆる輝点欠陥
などが生じる。つまり、輝点欠陥とは光を遮断するモー
ドにおいても光が透過してしまう欠陥であり、例えば液
晶表示装置がノーマリーホワイト方式の場合、電圧印加
（オン状態）にて黒色表示するため、ＴＦＴが破壊して
不作動となった状態では輝点欠陥が生じることになる。
このような輝点欠陥やその逆の減点欠陥が生じると、画
質が著しく劣化する。特に、光が漏れる輝点欠陥は目立
つため、画質劣化の程度が著しく、液晶表示装置に数個
の輝点欠陥が有るためにパネル全体が不良となって生産
効率が低下するという課題がある。By the way, in such a liquid crystal display device, when a TFT is broken or a voltage application line is short-circuited, a so-called bright spot defect in which light is always transmitted through the polarizing plate occurs. In other words, the bright spot defect is a defect that allows light to pass through even in a mode that blocks light. For example, when the liquid crystal display device is a normally white system, black display is performed by applying a voltage (on state), and thus the TFT In the state in which is destroyed and becomes inoperative, a bright spot defect occurs.
When such a bright spot defect or the opposite demerit defect occurs, the image quality significantly deteriorates. In particular, since bright spot defects that leak light are conspicuous, there is a problem that the degree of image quality deterioration is remarkable, and since the liquid crystal display device has several bright spot defects, the entire panel becomes defective and production efficiency decreases.
【０００６】しかしながら、このような液晶表示装置
は、液晶セルの完成後にしか輝点欠陥等の不良箇所を検
査することが出来ない。また、このような課題に対処す
るため、輝点欠陥にレーザ光等を照射してＴＦＴや偏光
板等を傷つけ、光を遮断する欠陥修正方法も提案されて
いるが、何れの場合も液晶表示装置にダメージを与える
ことになり、液晶表示装置の欠陥修正の信頼性を確保で
きない問題点がある。However, such a liquid crystal display device can inspect defective portions such as bright spot defects only after the liquid crystal cell is completed. In order to deal with such a problem, a defect correction method has been proposed in which a bright spot defect is irradiated with laser light or the like to damage a TFT, a polarizing plate, or the like, and light is blocked. This causes damage to the device, and there is a problem that reliability of defect correction of the liquid crystal display device cannot be ensured.
【０００７】[0007]
【発明が解決しようとする課題】本発明はかかる問題点
に鑑みてなされたもので、その課題は、従来の液晶表示
装置およびその欠陥修正における液晶表示装置へのダメ
ージを回避し、液晶表示装置の完成後にも簡単に欠陥修
正が可能な液晶表示装置およびその欠陥修正方法を提供
することである。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to avoid damage to the conventional liquid crystal display device and the liquid crystal display device in the defect correction thereof, and to provide the liquid crystal display device. It is an object of the present invention to provide a liquid crystal display device capable of easily correcting defects even after completion of, and a defect repairing method thereof.
【０００８】[0008]
【課題を解決するための手段】上述した本発明の課題を
解決するために以下の手段を講じた。すなわち、第１の
発明の液晶表示装置の基本的な構成として、複数の画素
部が形成された駆動基板と、対向基板とを含んで成る液
晶表示装置において、駆動基板および対向基板の少なく
とも一方の表面部には、輝点欠陥が形成された画素部を
遮光する不透明遮光膜が、熱接着型不透明薄膜（熱接着
型接着材に黒色の顔料またはカーボン粒を混合してシー
ト状にした膜）によって局所的に形成されて構成され
る。In order to solve the above-mentioned problems of the present invention, the following means have been taken. That is, as a basic configuration of the liquid crystal display device of the first invention, in a liquid crystal display device including a drive substrate on which a plurality of pixel portions are formed, and a counter substrate, at least one of the drive substrate and the counter substrate is provided. On the surface part, an opaque light-shielding film that shields the pixel part where the bright spot defect is formed is a heat-bonding type opaque thin film (a film formed by mixing a black pigment or carbon particles with a heat-bonding type adhesive material). Is locally formed by.
【０００９】上述した第１の発明の液晶表示装置の欠陥
修正は、以下の工程により行われる。すなわち、複数の
画素部が形成された駆動基板と、対向基板とを含んで成
る液晶表示装置の欠陥修正方法において、駆動基板およ
び前記対向基板の少なくとも一方の表面部に、熱接着型
不透明薄膜を設置する工程と、輝点欠陥が形成された画
素部以外をマスキングする工程と、マスキング工程によ
って用いられるマスキングを介してレーザ光を照射し、
熱接着型不透明薄膜を熱接着する工程と、その後、熱接
着された画素部以外の熱接着型不透明薄膜を剥離する工
程とを含んだ工程によって行われる。The above defect correction of the liquid crystal display device of the first invention is performed by the following steps. That is, in a defect repairing method of a liquid crystal display device including a drive substrate having a plurality of pixel portions formed therein and a counter substrate, a heat-bonding opaque thin film is provided on at least one surface portion of the drive substrate and the counter substrate. The step of setting, the step of masking other than the pixel portion where the bright spot defect is formed, and the laser light irradiation through the masking used in the masking step,
This is performed by a step including a step of thermally adhering the heat-adhesive opaque thin film and a step of peeling off the heat-adhesive opaque thin film other than the thermally adhered pixel portion.
【００１０】第２の発明の液晶表示装置の基本的な構成
は、複数の画素部が形成された駆動基板と、対向基板と
を含んで成る液晶表示装置において、駆動基板および対
向基板の少なくとも一方の表面部には、輝点欠陥が形成
された画素部を遮光する不透明遮光膜が、不透明感光性
樹脂によって局所的に形成されて構成される。A basic configuration of the liquid crystal display device of the second invention is a liquid crystal display device including a drive substrate having a plurality of pixel portions formed therein and a counter substrate, and at least one of the drive substrate and the counter substrate. An opaque light-shielding film that shields the pixel portion in which the bright spot defect is formed is locally formed of an opaque photosensitive resin on the surface of the.
【００１１】上述した第２の発明の液晶表示装置の欠陥
修正は、以下の工程により行われる。複数の画素部が形
成された駆動基板と、対向基板とを含んで成る液晶表示
装置の欠陥修正方法において、駆動基板および対向基板
の少なくとも一方の表面部に、不透明感光性樹脂を塗布
する工程と、輝点欠陥が形成された画素部等をマスキン
グする工程と、前記マスキングを介して、熱線、ＵＶ
光、ＥＢ光等の光線を照射し、不透明感光性樹脂を感光
する工程と、その後、熱処理によって不透明感光性樹脂
の強度を向上させる工程とを含んだ工程にて行われる。The above defect correction of the liquid crystal display device of the second invention is performed by the following steps. In a defect repairing method for a liquid crystal display device, which comprises a drive substrate having a plurality of pixel portions formed thereon, and a counter substrate, a step of applying an opaque photosensitive resin to at least one surface portion of the drive substrate and the counter substrate. A step of masking a pixel portion or the like on which a bright spot defect is formed, and a heat ray or UV through the masking.
This is performed in a step including a step of irradiating light such as light and EB light to expose the opaque photosensitive resin to light, and a step of subsequently improving the strength of the opaque photosensitive resin by heat treatment.
【００１２】第３の発明の液晶表示装置の基本的な構成
は、複数の画素部が形成された駆動基板と、対向基板と
を含んで成る液晶表示装置において、駆動基板および対
向基板の少なくとも一方の表面部には、輝点欠陥が形成
された画素部を遮光する不透明遮光膜が、ポジ型感光性
樹脂によって局所的に形成されて構成される。A basic configuration of the liquid crystal display device of the third invention is a liquid crystal display device including a drive substrate in which a plurality of pixel portions are formed and a counter substrate, and at least one of the drive substrate and the counter substrate. An opaque light-shielding film for light-shielding the pixel portion where the bright spot defect is formed is locally formed on the surface portion of the positive-type photosensitive resin.
【００１３】上述した第３の発明の液晶表示装置の欠陥
修正は、以下の工程により行われる。複数の画素部が形
成された駆動基板と、対向基板とを含んで成る液晶表示
装置の欠陥修正方法において、駆動基板および対向基板
の少なくとも一方の表面部に、ポジ型感光性樹脂を塗布
する工程と、輝点欠陥が形成された画素部以外をマスキ
ングする工程と、マスキングを介して光線を照射し、ポ
ジ型感光性樹脂を感光する工程と、その後、熱処理によ
ってポジ型感光性樹脂の強度を向上させる工程とを含ん
だ工程にて行われる。The defect correction of the liquid crystal display device of the third invention described above is performed by the following steps. In a defect repairing method for a liquid crystal display device, comprising a drive substrate having a plurality of pixel portions formed therein and a counter substrate, a step of applying a positive photosensitive resin to at least one surface portion of the drive substrate and the counter substrate. And a step of masking a portion other than the pixel portion where the bright spot defect is formed, a step of irradiating a light beam through the mask to expose the positive photosensitive resin, and then performing a heat treatment to increase the strength of the positive photosensitive resin. It is performed in the process including the process of improving.
【００１４】本発明の液晶表示装置およびその欠陥修正
方法によれば、液晶表示装置の組み立て終了後に輝点欠
陥となって表示品質を劣化させていた液晶表示装置に対
して、熱接着型不透明薄膜を形成して輝点欠陥を減点欠
陥に変換するようにした。これにより、輝点欠陥が生じ
ていても、光は不透明遮光膜によって遮断されるので、
輝点欠陥による画質の劣化を防ぐことができる。また、
本発明の液晶表示装置の欠陥修正方法は、液晶表示装置
の組み立て終了後に行うことができるため、液晶表示装
置にダメージを与えること無く、簡単に輝点箇所を目立
たなく修正することができる。According to the liquid crystal display device and the defect repairing method thereof of the present invention, a heat-bonding type opaque thin film is applied to a liquid crystal display device which has deteriorated display quality due to a bright spot defect after the liquid crystal display device is assembled. Is formed to convert the bright spot defect into the demerit defect. As a result, light is blocked by the opaque light-shielding film even if a bright spot defect occurs,
It is possible to prevent the deterioration of the image quality due to the bright spot defect. Also,
Since the defect repairing method for a liquid crystal display device of the present invention can be performed after the assembly of the liquid crystal display device is completed, it is possible to easily repair the bright spots inconspicuously without damaging the liquid crystal display device.
【００１５】[0015]
【発明の実施の形態】以下、本発明の具体的な実施の形
態につき添付図面を参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.
【００１６】先ず、図１を参照して本発明の液晶表示装
置の断面構造を説明する。図１は本発明の液晶表示装置
の基本的な構成を示す模式的な断面図である。なお、従
来技術の液晶表示装置と同一の部分には、以降も同一の
参照符号を付すものとする。First, the sectional structure of the liquid crystal display device of the present invention will be described with reference to FIG. FIG. 1 is a schematic sectional view showing the basic structure of a liquid crystal display device of the present invention. The same parts as those of the conventional liquid crystal display device will be denoted by the same reference numerals.
【００１７】図１における本発明の液晶表示装置の特徴
部分は、液晶表示装置の輝点画素上に不透明遮光膜１０
を形成して目立たなくした点である。すなわち、本発明
の液晶表示素子は、対向基板２や駆動基板３によって液
晶層６を挟持して構成される。本発明の液晶表示装置に
は正常画素１１と共に輝点画素１２が発生する場合があ
る。輝点画素１２が発生した場合には後述する方法にて
不透明遮光膜１０を形成し、輝点画素を減点画素に変換
して目立たなくする対応がなされる。The characteristic part of the liquid crystal display device of the present invention in FIG. 1 is that the opaque light-shielding film 10 is provided on the bright spot pixels of the liquid crystal display device.
It is the point that was formed to make it inconspicuous. That is, the liquid crystal display element of the present invention is configured by sandwiching the liquid crystal layer 6 between the counter substrate 2 and the drive substrate 3. In the liquid crystal display device of the present invention, bright spot pixels 12 may occur together with normal pixels 11. When the bright spot pixels 12 are generated, the opaque light-shielding film 10 is formed by a method described later, and the bright spot pixels are converted into deduction pixels to make them inconspicuous.
【００１８】このように、本発明の液晶表示装置の欠陥
修正方法によって輝点画素が減点画素に変換されること
により、従来、輝点画素によって液晶セル全体を不良と
していたものを救済して良品とするができる。但し、液
晶表示装置の完成前では、この輝点画素の所在が判らな
いため、減点画素に変えることはできない。本発明で
は、液晶表示装置の完成後にこの輝点箇所を判別し、そ
の箇所に対して不透明遮光膜１０を形成して目立たなく
した点がポイント部分である。なお、本例では、対向基
板２側に不透明遮光膜１０を形成した例を例示したが、
駆動基板３側や両側に形成しても良い。更に、対向基板
２や駆動基板３には偏光板（図示省略）を一体的に積層
して完成される。このように完成された本発明の液晶表
示装置は、前述の如く動作される。As described above, the bright spot pixel is converted into the demerit pixel by the defect repairing method of the liquid crystal display device according to the present invention, so that the defective liquid crystal cell which is conventionally defective by the bright spot pixel is relieved. You can However, before the completion of the liquid crystal display device, since the location of the bright spot pixel cannot be known, it cannot be changed to the demerit pixel. In the present invention, the point portion is a point where the bright spot portion is discriminated after the liquid crystal display device is completed, and the opaque light-shielding film 10 is formed at that portion to make it inconspicuous. In this example, the opaque light-shielding film 10 is formed on the counter substrate 2 side, but
It may be formed on the drive substrate 3 side or both sides. Further, a polarizing plate (not shown) is integrally laminated on the counter substrate 2 and the drive substrate 3 to complete the process. The liquid crystal display device of the present invention thus completed is operated as described above.
【００１９】引き続き、図２および図３を参照して本発
明の液晶表示装置およびその欠陥修正方法の２例につ
き、順次説明する。Subsequently, two examples of the liquid crystal display device and the defect repairing method thereof according to the present invention will be sequentially described with reference to FIGS.
【００２０】実施の形態例１ 先ず、図２を参照して本発明の液晶表示装置およびその
欠陥修正方法の実施の形態例１の詳細を説明する。図２
は本発明の液晶表示装置およびその欠陥修正方法の実施
の形態例１を示す工程断面図である。Embodiment 1 First, referring to FIG. 2, the details of Embodiment 1 of the liquid crystal display device and its defect correcting method of the present invention will be described. FIG.
FIG. 3 is a process sectional view showing a first embodiment of the liquid crystal display device and the defect repairing method thereof according to the present invention.
【００２１】本例の液晶表示装置の欠陥修正方法は、図
２（ａ）に示すように、熱接着型不透明薄膜１３を対向
基板２上に載置し、液晶表示装置の完成後に確認した輝
点欠陥箇所に対応したマスクガラス１４を介してＣＯ2
レーザ、半導体レーザおよびエキシマレーザ発振機（図
示省略）などからレーザ光Ａを発振して照射する。な
お、レーザ発振機のレーザ光は予め最適な接着強度が得
られるレーザ光強度に設定されている。この熱接着型不
透明薄膜１３は熱接着型であるため、レーザ光Ａを照射
した部分だけ熱変化して対向基板２表面上に接着される
（図２（ｂ）参照）。As shown in FIG. 2A, the defect repairing method of the liquid crystal display device of this example is such that the heat-bonding type opaque thin film 13 is placed on the counter substrate 2 and the brightness is confirmed after the completion of the liquid crystal display device. CO 2 through the mask glass 14 corresponding to the point defect location
Laser light A is oscillated and emitted from a laser, a semiconductor laser, an excimer laser oscillator (not shown), or the like. The laser light of the laser oscillator is set in advance to a laser light intensity that provides the optimum adhesive strength. Since this heat-bonding type opaque thin film 13 is a heat-bonding type, only the portion irradiated with the laser beam A undergoes thermal change and is bonded onto the surface of the counter substrate 2 (see FIG. 2B).
【００２２】次に、同図（ｃ）に示すように、熱接着型
不透明薄膜１３を対向基板２上に熱接着した部分以外を
剥離する。これにより、熱接着型不透明薄膜１３は輝点
欠陥箇所に対応した位置に強固に接着されて残り、液晶
表示装置の輝点画素１２を目立たなくすることができ
る。なお、レーザ光Ａはマスクガラス１４を使用するこ
となく、直接輝点欠陥箇所に対応した位置に直接照射し
ても良い。Next, as shown in FIG. 3C, the heat-adhesive opaque thin film 13 is peeled off except the portion heat-bonded on the counter substrate 2. As a result, the heat-bonding type opaque thin film 13 is firmly adhered and remains at the position corresponding to the bright spot defect portion, and the bright spot pixels 12 of the liquid crystal display device can be made inconspicuous. The laser light A may be directly applied to the position corresponding to the bright spot defect portion without using the mask glass 14.
【００２３】実施の形態例２ 本実施例は熱接着型不透明薄膜に代えて、黒色に着色さ
れた不透明感光性樹脂を使用した例であり、これを図３
を参照して説明する。図３は本発明の液晶表示装置およ
びその欠陥修正方法の実施の形態例２を示す工程断面図
である。Embodiment 2 This embodiment is an example in which an opaque photosensitive resin colored in black is used in place of the heat-bonding type opaque thin film, and this is shown in FIG.
This will be described with reference to FIG. 3A to 3C are process sectional views showing a second embodiment of the liquid crystal display device and the defect repairing method thereof according to the present invention.
【００２４】本例の液晶表示装置の欠陥修正方法は、図
３（ａ）に示すように、例えば黒色に着色された不透明
感光性樹脂１５を対向基板２上に塗布する。不透明感光
性樹脂の要件としては、通常状態では透過率が殆ど無
く、紫外線に感光することで透過率が向上するとともに
非感光の部分は透過率が向上しない材料であり、更に熱
重合により強度が強化される感光材料であることが要求
される。In the defect correcting method of the liquid crystal display device of this embodiment, as shown in FIG. 3A, for example, an opaque photosensitive resin 15 colored in black is applied onto the counter substrate 2. As a requirement for the opaque photosensitive resin, there is almost no transmittance in a normal state, the transmittance is improved by being exposed to ultraviolet rays and the transmittance is not improved in the non-exposed portion, and further, the strength is increased by thermal polymerization. It is required to be a light-sensitive material to be strengthened.
【００２５】続いて、液晶表示装置の完成後に確認した
輝点欠陥箇所に対応したマスクガラス１４′を介してＵ
Ｖ発振機（図示省略）からＵＶ光Ｂを発振して照射し、
トランジスタ部及び蓄積容量部をマスクとして用いるこ
とにより、輝点画素１２に対応した部分の不透明感光性
樹脂１５の透過率を向上（感光）させる（図３（ａ）参
照）。Subsequently, U is passed through the mask glass 14 'corresponding to the bright spot defect portion confirmed after the completion of the liquid crystal display device.
UV light B is oscillated and emitted from a V oscillator (not shown),
By using the transistor portion and the storage capacitor portion as a mask, the transmittance of the opaque photosensitive resin 15 in the portion corresponding to the bright spot pixel 12 is improved (sensitized) (see FIG. 3A).
【００２５】なお、この不透明感光性樹脂１５の感光
は、前述のマスクガラス１４′を用いることなく、画素
部に駆動信号を印加して欠陥画素を検出後、そのまま画
素部をマスクとしてセルフアライン方式にて行うことも
できる（同図（ｃ））。最後に、熱処理工程において例
えば１００乃至４００°Ｃの温度で熱処理を施すことに
より、不透明感光性樹脂１５の強度を向上させて液晶表
示装置の欠陥修正工程を終了する（同図（ｂ）参照）。The opaque photosensitive resin 15 is exposed by the self-alignment method without applying the above-mentioned mask glass 14 ', after applying a driving signal to the pixel portion to detect a defective pixel and using the pixel portion as a mask as it is. It can also be performed at ((c) in the same figure). Finally, in the heat treatment step, heat treatment is performed at a temperature of, for example, 100 to 400 ° C. to improve the strength of the opaque photosensitive resin 15 and complete the defect repairing step of the liquid crystal display device (see FIG. 7B). .
【００２６】本例の不透明感光性樹脂１５は、表面が平
滑なガラス面に対して更に強力な接着力をもって接着さ
れるため、塵埃等の汚れを除去するために表面を拭き取
る等の清掃作業を行ってもガラス表面から不透明感光性
樹脂１５が剥離することがない。そして、輝点画素１２
が生じていても、光は不透明感光性樹脂１５によって遮
断され、結果的に輝点画素１２による液晶表示装置の画
質の劣化を防ぐことができる。Since the opaque photosensitive resin 15 of this example is adhered to a smooth glass surface with a stronger adhesive force, cleaning work such as wiping the surface to remove dirt such as dust is carried out. Even if it is performed, the opaque photosensitive resin 15 does not peel off from the glass surface. Then, the bright spot pixel 12
Even if the light is generated, the light is blocked by the opaque photosensitive resin 15, and as a result, the deterioration of the image quality of the liquid crystal display device due to the bright spot pixels 12 can be prevented.
【００２７】ここで、対向基板２に塗布する不透明感光
性樹脂材料の他の実施例として、ポジ型感光性樹脂を用
いることも可能である。つまり、駆動基板３側に遮光膜
となる染料等を含有したポジ型感光性樹脂を塗布した
後、例えばマスクガラスの不透明部を反転してＵＶ光Ｂ
を照射することにより、輝点画素１２部分の樹脂材料は
残余させ、それ以外の部分は溶解して無くなるような感
光材料を用いることも可能である。また、本発明の不透
明遮光膜は対向基板２側や駆動基板３側の何方か一方、
若しくは両方に形成しても良い。更に、塗布する感光性
樹脂が不透明の熱硬化型接着材や熱硬化型インクであっ
ても良いことは論を待たない。本発明は前記実施例に限
定されず、様々な形態に発展できることは言うまでもな
い。Here, as another example of the opaque photosensitive resin material applied to the counter substrate 2, a positive photosensitive resin can be used. That is, after applying a positive type photosensitive resin containing a dye or the like serving as a light-shielding film to the drive substrate 3 side, for example, the opaque portion of the mask glass is reversed to UV light B.
It is also possible to use a photosensitive material in which the resin material in the bright-spot pixel 12 portion is left and the other portions are dissolved and disappeared by irradiating with. Further, the opaque light-shielding film of the present invention is provided on one of the counter substrate 2 side and the drive substrate 3 side,
Alternatively, both may be formed. Furthermore, it goes without saying that the photosensitive resin to be applied may be an opaque thermosetting adhesive or thermosetting ink. It is needless to say that the present invention is not limited to the above embodiment and can be developed into various forms.
【００２８】[0028]
【発明の効果】以上説明したように、本発明の液晶表示
装置およびその欠陥修正方法によれば、液晶表示装置の
組み立て終了後に輝点欠陥となって表示品質を劣化させ
ていた液晶表示装置に対して、不透明遮光膜を形成して
輝点欠陥を減点欠陥に変換するため、液晶表示装置の組
み立て終了後であっても、液晶表示装置にダメージを与
えること無く、容易かつ確実に輝点箇所を目立たなく修
正することができる。As described above, according to the liquid crystal display device and the defect repairing method of the present invention, the liquid crystal display device, which has a bright spot defect after the assembly of the liquid crystal display device and deteriorates the display quality, can be applied. On the other hand, since the opaque light-shielding film is formed to convert the bright spot defects into the demerit spot defects, even after the liquid crystal display device is assembled, the bright spot locations can be easily and reliably maintained without damaging the liquid crystal display device. Can be corrected inconspicuously.
【図１】 本発明の液晶表示装置の基本的な構成を示す
模式的な断面図である。FIG. 1 is a schematic cross-sectional view showing a basic configuration of a liquid crystal display device of the present invention.
【図２】 本発明の液晶表示装置およびその欠陥修正方
法の実施の形態例１を示す工程断面図である。FIG. 2 is a process sectional view showing a first embodiment of a liquid crystal display device and a defect repairing method thereof according to the present invention.
【図３】 本発明の液晶表示装置およびその欠陥修正方
法の実施の形態例２を示す工程断面図である。FIG. 3 is a process sectional view showing a second embodiment of the liquid crystal display device and the defect repairing method thereof according to the present invention.
【図４】 本発明に係わる液晶表示装置の基本的な構成
を示す模式的な断面図である。FIG. 4 is a schematic sectional view showing a basic configuration of a liquid crystal display device according to the present invention.
１…液晶表示装置、２…対向基板、３…駆動基板、４…
スペーサ、５…シール材、６…液晶層、１０…不透明遮
光膜、１１…正常画素、１２…輝点画素、１３…熱接着
型不透明薄膜、１４，１４′…マスクガラス、１５…不
透明感光性樹脂1 ... Liquid crystal display device, 2 ... Counter substrate, 3 ... Drive substrate, 4 ...
Spacer, 5 ... Sealing material, 6 ... Liquid crystal layer, 10 ... Opaque light-shielding film, 11 ... Normal pixel, 12 ... Bright spot pixel, 13 ... Thermal adhesive type opaque thin film, 14, 14 '... Mask glass, 15 ... Opaque photosensitivity resin
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０９Ｆ 9/00 ３３８ Ｇ０９Ｆ 9/00 ３３８ 9/30 ３４９ 9/30 ３４９Ｃ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location G09F 9/00 338 G09F 9/00 338 9/30 349 9/30 349C
Claims (11)
対向基板とを含んで成る液晶表示装置において、 前記駆動基板および前記対向基板の少なくとも一方の表
面部には、輝点欠陥が形成された画素部を遮光する不透
明遮光膜が、熱接着型不透明薄膜によって局所的に形成
されていることを特徴とする液晶表示装置。1. A drive substrate having a plurality of pixel portions formed thereon,
In a liquid crystal display device including a counter substrate, an opaque light-shielding film that shields a pixel portion having a bright spot defect from light is provided on at least one surface of the drive substrate and the counter substrate, and the heat-bonding opaque thin film. A liquid crystal display device characterized by being locally formed by.
対向基板とを含んで成る液晶表示装置の欠陥修正方法に
おいて、 前記駆動基板および前記対向基板の少なくとも一方の表
面部に、熱接着型不透明薄膜を設置する工程と、 輝点欠陥が形成された画素部以外をマスキングする工程
と、 前記マスキングを介してレーザ光を照射し、熱接着型不
透明薄膜を熱接着する工程と、 その後、熱接着された画素部以外の熱接着型不透明薄膜
を剥離する工程とを含むことを特徴とする液晶表示装置
の欠陥修正方法。2. A drive substrate having a plurality of pixel portions formed thereon,
A method of repairing a defect of a liquid crystal display device, comprising: a counter substrate; a step of disposing a heat-bonding opaque thin film on at least one surface portion of the drive substrate and the counter substrate; A step of masking a portion other than a portion, a step of irradiating a laser beam through the masking to heat-bond the heat-bonding opaque thin film, and a step of peeling the heat-bonding opaque thin film other than the heat-bonded pixel portion A defect repairing method for a liquid crystal display device, comprising:
前記マスキングを用いることなく、直接レーザ光を照射
して行うことを特徴とする請求項２に記載の液晶表示装
置の欠陥修正方法。3. A step of attaching a heat-bonding type opaque thin film,
The defect repairing method for a liquid crystal display device according to claim 2, wherein laser beam irradiation is performed directly without using the masking.
対向基板とを含んで成る液晶表示装置において、 前記駆動基板および前記対向基板の少なくとも一方の表
面部には、輝点欠陥が形成された画素部を遮光する不透
明遮光膜が、不透明感光性樹脂によって局所的に形成さ
れていることを特徴とする液晶表示装置。4. A drive substrate having a plurality of pixel portions formed thereon,
In a liquid crystal display device including a counter substrate, an opaque light-shielding film that shields a pixel portion in which a bright spot defect is formed is provided on at least one surface portion of the drive substrate and the counter substrate by an opaque photosensitive resin. A liquid crystal display device, which is locally formed.
対向基板とを含んで成る液晶表示装置の欠陥修正方法に
おいて、 前記駆動基板および前記対向基板の少なくとも一方の表
面部に、不透明感光性樹脂を塗布する工程と、 輝点欠陥が形成された画素部をマスキングする工程と、 前記マスキングを介して光線を照射し、不透明感光性樹
脂を感光する工程と、 その後、熱処理によって不透明感光性樹脂の強度を向上
させる工程とを含むことを特徴とする液晶表示装置の欠
陥修正方法。5. A drive substrate having a plurality of pixel portions formed thereon,
A method of repairing a defect of a liquid crystal display device, comprising: a counter substrate; a step of applying an opaque photosensitive resin to at least one surface portion of the drive substrate and the counter substrate; and a pixel portion in which a bright spot defect is formed. And a step of exposing the opaque photosensitive resin to light by irradiating a light beam through the masking, and a step of subsequently improving the strength of the opaque photosensitive resin by heat treatment. Equipment defect repair method.
ＵＶ光、ＥＢ光の内の少なくとも一つであることを特徴
とする請求項５に記載の液晶表示装置の欠陥修正方法。6. The process of exposing an opaque photosensitive resin to heat rays,
The defect repair method for a liquid crystal display device according to claim 5, wherein the defect repair method is at least one of UV light and EB light.
動基板のＴＦＴ部を用いたセルフアライン方式にて行う
ことを特徴とする請求項５に記載の液晶表示装置の欠陥
修正方法。7. The method of correcting defects in a liquid crystal display device according to claim 5, wherein the step of exposing the opaque photosensitive resin is performed by a self-alignment method using the TFT portion of the drive substrate.
対向基板とを含んで成る液晶表示装置において、 前記駆動基板および前記対向基板の少なくとも一方の表
面部には、輝点欠陥が形成された画素部を遮光する不透
明遮光膜が、ポジ型感光性樹脂によって局所的に形成さ
れていることを特徴とする液晶表示装置。8. A drive substrate having a plurality of pixel portions formed thereon,
In a liquid crystal display device including a counter substrate, an opaque light-shielding film that shields a pixel portion in which a bright spot defect is formed is provided on at least one surface portion of the drive substrate and the counter substrate, and a positive photosensitive resin. A liquid crystal display device characterized by being locally formed by.
対向基板とを含んで成る液晶表示装置の欠陥修正方法に
おいて、 前記駆動基板および前記対向基板の少なくとも一方の表
面部に、ポジ型感光性樹脂を塗布する工程と、 輝点欠陥が形成された画素部以外をマスキングする工程
と、 前記マスキングを介して光線を照射し、ポジ型感光性樹
脂を感光する工程と、 その後、熱処理によってポジ型感光性樹脂の強度を向上
させる工程とを含むことを特徴とする液晶表示装置の欠
陥修正方法。9. A drive substrate having a plurality of pixel portions formed thereon,
A method of repairing a defect of a liquid crystal display device, comprising: a counter substrate; a step of applying a positive photosensitive resin to at least one surface portion of the drive substrate and the counter substrate; and a pixel in which a bright spot defect is formed. And a step of exposing the positive type photosensitive resin to light by irradiating a light beam through the masking and a step of subsequently improving the strength of the positive type photosensitive resin by heat treatment. A method for correcting defects in a liquid crystal display device.
線、ＵＶ光、ＥＢ光の内の少なくとも一つであることを
特徴とする請求項９に記載の液晶表示装置の欠陥修正方
法。10. The method of repairing defects in a liquid crystal display device according to claim 9, wherein the exposing step of the positive photosensitive resin is at least one of heat rays, UV light and EB light.
駆動基板のＴＦＴ部を用いたセルフアライン方式にて行
うことを特徴とする請求項９に記載の液晶表示装置の欠
陥修正方法。11. The defect correcting method for a liquid crystal display device according to claim 9, wherein the exposing step of the positive type photosensitive resin is performed by a self-alignment method using the TFT portion of the driving substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5025596A JPH09244020A (en) | 1996-03-07 | 1996-03-07 | Liquid crystal display device and defect correcting method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5025596A JPH09244020A (en) | 1996-03-07 | 1996-03-07 | Liquid crystal display device and defect correcting method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09244020A true JPH09244020A (en) | 1997-09-19 |
Family
ID=12853880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5025596A Pending JPH09244020A (en) | 1996-03-07 | 1996-03-07 | Liquid crystal display device and defect correcting method therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09244020A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990083581A (en) * | 1998-04-28 | 1999-11-25 | 모리시타 요이찌 | Liquid Crystal pannel and Method of manufacturing the same |
| JP2005284305A (en) * | 2005-05-09 | 2005-10-13 | Sony Corp | Method for manufacturing image display device |
| US8101432B2 (en) | 2001-06-12 | 2012-01-24 | Sony Corporation | Method of repairing an image display unit |
-
1996
- 1996-03-07 JP JP5025596A patent/JPH09244020A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990083581A (en) * | 1998-04-28 | 1999-11-25 | 모리시타 요이찌 | Liquid Crystal pannel and Method of manufacturing the same |
| US8101432B2 (en) | 2001-06-12 | 2012-01-24 | Sony Corporation | Method of repairing an image display unit |
| JP2005284305A (en) * | 2005-05-09 | 2005-10-13 | Sony Corp | Method for manufacturing image display device |
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