JPH04178622A - Liquid crystal display device and production thereof - Google Patents
Liquid crystal display device and production thereofInfo
- Publication number
- JPH04178622A JPH04178622A JP2307689A JP30768990A JPH04178622A JP H04178622 A JPH04178622 A JP H04178622A JP 2307689 A JP2307689 A JP 2307689A JP 30768990 A JP30768990 A JP 30768990A JP H04178622 A JPH04178622 A JP H04178622A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- bright spot
- spot defect
- crystal display
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 72
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 230000007547 defect Effects 0.000 claims abstract description 68
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 229920002120 photoresistant polymer Polymers 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims description 7
- 230000002950 deficient Effects 0.000 abstract description 8
- 206010027146 Melanoderma Diseases 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 239000000049 pigment Substances 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 239000006229 carbon black Substances 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 6
- 239000010409 thin film Substances 0.000 description 5
- 239000010408 film Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/50—Protective arrangements
- G02F2201/506—Repairing, e.g. with redundant arrangement against defective part
- G02F2201/508—Pseudo repairing, e.g. a defective part is brought into a condition in which it does not disturb the functioning of the device
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、液晶表示装置及びその製造方法に関し、特に
アクティブマトリクス駆動の液晶表示装置及びその製造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display device and a method for manufacturing the same, and more particularly to an active matrix-driven liquid crystal display device and a method for manufacturing the same.
液晶デイスプレィは薄型、低消費電力の特長を生かし、
時計、電車からワープロ等へ広く実用化されている。特
に、薄膜トランジスタや薄膜ダイオ−Ｆなどの能動素子
により液晶を駆動する所謂アクティブマトリクス駆動の
液晶ナイスプレイは鮮明な高コントラスｌの表示が可能
で、かつ三原色カラーフィルタアレイを内蔵させること
でフルカラー表示も可能となるため注目されている。Liquid crystal displays take advantage of their thinness and low power consumption.
It is widely used in everything from watches and trains to word processors. In particular, the so-called active matrix-driven liquid crystal Nice Play, which drives the liquid crystal using active elements such as thin-film transistors and thin-film diodes, is capable of displaying clear, high-contrast images, and can also display full color by incorporating a three-primary color filter array. It is attracting attention because it is possible.
アクティブマトリクス駆動液晶デイスプレィの場合、各
表示画素に対応する個々の表示画素電極に薄膜トランジ
スタなどの能動素子が個別に付加されており、この能動
素子を外部からの信号電圧で個別に制御することで、各
表示画素電極を独立に制御することが可能となっている
。従って、正常な表示を得るためには、前記各表示画素
毎に形成されている能動素子すべてが正常なスイッチン
グ動作をしなければならない。例えば、表示客月１６４
０Ｆつ）Ｘ４００ドツトのデイスプレィの場合、モノク
ロ表示で６４０〉ぐ４００ （＝２５６，０００）個の
表示画素電極と能動素子が形成されである。In the case of active matrix drive liquid crystal displays, active elements such as thin film transistors are individually added to each display pixel electrode corresponding to each display pixel, and by individually controlling these active elements with external signal voltages, It is possible to control each display pixel electrode independently. Therefore, in order to obtain a normal display, all active elements formed for each display pixel must perform normal switching operations. For example, display customer month 164
In the case of a display with 0F x 400 dots, 640>400 (=256,000) display pixel electrodes and active elements are formed for monochrome display.
前記個別の能動素子の動作が異常の場合、ティスプレィ
としてはドツト単位の表示欠陥、所謂点欠陥となる。こ
の点欠陥は大別すると２種類あり、ひとつは明点欠陥、
即ち黒色表示時に明るい点欠陥となるもの、もうひとつ
は暗点欠陥、即ち白色表示時に暗い点欠陥となるもので
ある。この中で、明点欠陥は重大な表示欠陥となり、数
個以上あると液晶ティスプレィとしては不良となり、ア
クティブマトリクス駆動液晶デイスプレィの製造歩留が
低い大きな要因となっている。If the operation of the individual active elements is abnormal, a display defect occurs in units of dots, a so-called point defect. There are two types of point defects; one is a bright point defect;
That is, one is a bright spot defect when displaying black, and the other is a dark spot defect, that is, a dark spot defect when displaying white. Among these, bright spot defects are serious display defects, and if there are more than a few, the liquid crystal display is defective, and is a major factor in the low manufacturing yield of active matrix driven liquid crystal displays.
ご発明が解決しようとする課題〕
従来のアクティツマトリクス液晶ティスプレィにおいて
は、数個の明点欠陥があわは、表示上重大な欠陥となる
ので液晶ティスプレィとして不良となり歩留を低下させ
るという問題点があった。[Problems to be Solved by the Invention] In the conventional actitus matrix liquid crystal display, a few bright spot defects become serious defects in the display, resulting in a defective liquid crystal display and reducing the yield. was there.
〔課題を解決するための手段二
本発明によれば、少なくとも一方が透明な一対の電極基
板間に液晶物質を充填して成る液晶）くネルを配置した
液晶表示装置において、一対の電極基板の一方の上には
複数の画素電極が形成され、一対の電極基板の他方には
共通電極が形成され、かつ液晶パネルを黒色表示した場
合に、明点欠陥となる、画素電極に対応する液晶パイル
の表面上の位置に、明点欠陥からもれてくる光を吸収で
きる物質を含む層が形成されていることを特徴とする液
晶表示装置が得られる。[Means for Solving the Problems 2] According to the present invention, in a liquid crystal display device in which a liquid crystal channel is arranged in which a liquid crystal material is filled between a pair of electrode substrates, at least one of which is transparent, A plurality of pixel electrodes are formed on one of the electrode substrates, a common electrode is formed on the other of the pair of electrode substrates, and the liquid crystal pile corresponding to the pixel electrodes causes a bright spot defect when the liquid crystal panel displays black. A liquid crystal display device characterized in that a layer containing a substance capable of absorbing light leaking from bright point defects is formed at a position on the surface of the liquid crystal display device.
さらに本発明によれは、液晶パイ、ルの表面上に、光を
吸収できる物質を分散させたフォトレジストを塗布する
工程と、明点欠陥部となる画素電極に対応する位置のみ
を露光硬化させる工程と、硬化しなかったフォトレジス
トを除去する工程とを含むことを特徴とする液晶表示装
置の製造方法が得られる。Further, according to the present invention, there is a step of applying a photoresist in which a substance capable of absorbing light is dispersed on the surface of the liquid crystal layer, and exposing and curing only the positions corresponding to the pixel electrodes that will become bright spot defects. A method for manufacturing a liquid crystal display device is obtained, which is characterized in that it includes a step and a step of removing uncured photoresist.
本発明は、アクティブマトリクス液晶ティスプレィに点
欠陥が生じた場合、暗点欠陥がさほど重大な欠陥ではな
いのに対して、明点欠陥は数個以上あると不良となって
しまう重大な欠陥であるという事実に基づくものである
。すなわち、製造過程において生じてしまった明点欠陥
を、比較的簡単に暗点欠陥に変えることが出来れば、歩
留を高くすることができるのである。According to the present invention, when a point defect occurs in an active matrix liquid crystal display, a dark spot defect is not a very serious defect, whereas a bright spot defect is a serious defect that causes a defect if there are several or more. This is based on the fact that In other words, if bright spot defects that occur during the manufacturing process can be converted into dark spot defects relatively easily, the yield can be increased.
明点欠陥とは、常に明るく光っている部分のことである
。送られてくる信号電圧によっても所詮変化しないので
あれば、その部分は黒くしてしまった方が好ましい。明
点欠陥となる画素電極部に対応する液晶パネルの表面上
の位置に、明点欠陥からもれる光を吸収できる層を形成
する。この結果、明点欠陥部は、常に暗い暗点欠陥とな
るのである。明点欠陥からもれてくる光を吸収できる物
質を含む層を、必要以上に大きくすることは、それによ
って新たな暗点欠陥を増加させることになるので、必要
な箇所に必要最小限の光吸収層を形成することが望まし
い。A bright spot defect is a part that always shines brightly. If it does not change after all due to the signal voltage that is sent, it is better to make that part black. A layer capable of absorbing light leaking from the bright spot defect is formed at a position on the surface of the liquid crystal panel corresponding to the pixel electrode portion where the bright spot defect occurs. As a result, the bright spot defect always becomes a dark dark spot defect. Making the layer containing a substance that can absorb light leaking from bright spot defects larger than necessary will increase the number of new dark spot defects, so it is necessary to minimize the amount of light needed where it is needed. It is desirable to form an absorbent layer.
本発明の製造方法においては、液晶パネルの表面上に光
を吸収できる物質を均一分散させたフォトレジストを均
一に塗布し、明点欠陥部となる画素電極に対応する位置
のみを露光硬化する。In the manufacturing method of the present invention, a photoresist in which a substance capable of absorbing light is uniformly dispersed is uniformly applied onto the surface of a liquid crystal panel, and only the positions corresponding to the pixel electrodes, which are bright spot defects, are exposed and hardened.
明点欠陥部となる画素電極に対応する位置のみを露光硬
化する方法としては、以下の様な方法が挙げられる。As a method of exposing and curing only the position corresponding to the pixel electrode which becomes the bright point defect, the following method can be mentioned.
液晶パネル上の全面にフォトレジストを塗布した後、画
素電極部てをオンにすると、明点欠陥部のみが光り、そ
の他の部分は全て黒表示となる。After coating the entire surface of the liquid crystal panel with photoresist, when the pixel electrode section is turned on, only the bright spot defect section lights up, and all other sections display black.
この状態で、液晶パネルの下面から露光すれば明点欠陥
部のみ光が透過し、その部分に存在するフォトレジスト
を選択的に露光することができる。In this state, if the liquid crystal panel is exposed to light from the bottom surface, light will pass through only the bright point defect area, and the photoresist existing in that area can be selectively exposed.
すなわち、明点欠陥部上のフォトレジストのみを硬化さ
せることができる。That is, only the photoresist on the bright spot defect portion can be cured.
ここで、液晶パネルは石英ガラスであることが多いので
、カラーフィルターを用いない白黒パネルの場合はＦか
ら来る紫外線の透過を遮断しない。Here, since liquid crystal panels are often made of quartz glass, in the case of black and white panels that do not use color filters, they do not block the transmission of ultraviolet rays coming from F.
しかし、液晶パネル内にカラーフィルターを挿入し、た
場合は、カラーフィルターが紫外線の透過を遮断するた
めに上述の様な方法ではフォトレジストを露光すること
ができない。そこで、カラー液晶の場合は、他の方法を
用いることか好ましい。However, if a color filter is inserted into the liquid crystal panel, the photoresist cannot be exposed using the method described above because the color filter blocks the transmission of ultraviolet rays. Therefore, in the case of color liquid crystal, it is preferable to use another method.
まず対象とする液晶ナイスプレイの画素電極の表示状態
の検出を行い、明点欠陥部がどこにあるかを調べる。内
部パターンは全く同一でカラーフィルタ一部を取り除い
た全く点欠陥の無い第２の液晶デイスプレィを用意する
。先の対象とする液晶デイスプレィの液晶パネル表面に
フｍ、 ）レジストを塗布した後、用意した第２の液晶
ライスプレイを塗布したフォトレジストの上からもとの
液晶ティスプレィに重ね合わせる。検出した明点欠陥部
の真上にある第２の液晶ナイスプレイを画素電極をオフ
にし、その他の部分を全てオンとすると、もとの液晶デ
イスプレィの四点欠陥部上に塗布したフォトレジストの
みに光が当たり、その部分のフォトレジストが露光硬化
する。First, the display state of the pixel electrode of the target liquid crystal Nice Play is detected, and the location of the bright spot defect is investigated. A second liquid crystal display with completely the same internal pattern and no point defects from which a part of the color filter has been removed is prepared. After applying a resist to the surface of the liquid crystal panel of the liquid crystal display to be used above, the prepared second liquid crystal rice spray is placed over the coated photoresist onto the original liquid crystal display. When you turn off the pixel electrode of the second liquid crystal Nice Play directly above the detected bright spot defect and turn on all other parts, only the photoresist coated on the four-point defect of the original liquid crystal display will be visible. When exposed to light, the photoresist in that area is exposed and hardened.
以−１−の方法により、明点欠陥部上部のフォトレジス
トが硬化した後、硬化しなかったフォトレジストを除去
することにより、明点欠陥部の光の苑が遮断される液晶
表示装置が得られる。By the method described in -1- below, after the photoresist above the bright spot defect is cured, the uncured photoresist is removed, thereby obtaining a liquid crystal display device in which the garden of light in the bright spot defect is blocked. It will be done.
口実雄側〕 次に、本発明について図面を用（・て詳細に説明する。Excuse male side] Next, the present invention will be explained in detail using the drawings.
第１図は本発明の一実施例を示す液晶ティスプレィの模
式的断面図であり、第２図は従来の技術から成る液晶デ
イスプレィの模式的断面図である。FIG. 1 is a schematic cross-sectional view of a liquid crystal display according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of a liquid crystal display according to the prior art.
第２図に見られる様に、従来液晶ティスプレィは適切な
配向処理を行なった一対の電極基板間］、５に液晶物質
を充填して成る構成である。As shown in FIG. 2, a conventional liquid crystal display has a structure in which a liquid crystal material is filled between a pair of electrode substrates which have undergone appropriate alignment treatment.
一方の電極基板ｌ上には三原色Ｒ，Ｇ、Ｂカラーフィル
ターアレイ２が形成され、その上にはＩＴＯ（インジウ
ムチンオキサイド）の透明電極から成る共通電極３が形
成され、更にその上には液晶物質９の均一なＴＮ配向状
態を得る為に、−定方位にラビング処理したポリイミド
配向膜４が形成されている。On one electrode substrate l, a three primary color R, G, B color filter array 2 is formed, on top of which a common electrode 3 made of a transparent electrode of ITO (indium tin oxide) is formed, and further above that is a liquid crystal In order to obtain a uniform TN orientation state of the substance 9, a polyimide orientation film 4 is formed which has been subjected to a rubbing treatment in a -direction.
一方の電極基板５上にＩＴＯから成る表示画素電極６及
びＣｒ等の金属から成る配線部７が形成されている。な
お、各表示画素電極６と配線部７は薄膜トランジスタを
介して接続されている。電極基板１同様、電極基板表面
上には、液晶物質９の均一なＴＮ配向を得る為のラビン
グ処理を行なったポリイミド樹脂から成る配向膜８か形
成されている。画電極基板］、５は一定の間隔を保ちな
がら、周辺部はエポキシ樹脂から成るシール材で貼り合
わされている。なお、一定の間隔を得る為に、シール材
中及びパネル内部には一定の厚みを有するスペーサ材が
散布されている（図示せず）。On one electrode substrate 5, a display pixel electrode 6 made of ITO and a wiring part 7 made of metal such as Cr are formed. Note that each display pixel electrode 6 and wiring section 7 are connected via a thin film transistor. Similar to the electrode substrate 1, an alignment film 8 made of polyimide resin is formed on the surface of the electrode substrate and is subjected to a rubbing treatment to obtain a uniform TN alignment of the liquid crystal material 9. Picture electrode substrate], 5 are bonded together at their peripheral portions with a sealing material made of epoxy resin while maintaining a constant spacing. Note that in order to obtain a constant spacing, a spacer material having a constant thickness is spread inside the sealing material and inside the panel (not shown).
液晶物質としてはＴＮ動作を行なう、通常の誘電異方性
が正の材料を用いることができる。実際に表示を行なう
ために一対の偏光板Ｎｏ、１１が設置されている。通常
のＴＮ動作においては、電圧非印加状態で白表示（ノー
マリ、ホワイトモーＦ）にするか、黒表示（ノーマリブ
ラックモード）にするかで偏光板のレイアウトが異なる
。本発明においてはいずれでも採用できるが、本実施例
においてはノーマリホワイトモードになるように偏光板
１０．１１がクロスポーラライザーの状態で配置されで
ある。As the liquid crystal material, a normal material that performs TN operation and has positive dielectric anisotropy can be used. A pair of polarizing plates No. 11 are installed for actual display. In normal TN operation, the layout of the polarizing plate differs depending on whether white display (normally, white mode F) or black display (normally black mode) is performed with no voltage applied. In the present invention, any of these can be adopted, but in this embodiment, the polarizing plates 10 and 11 are arranged in a cross polarizer state so as to be in normally white mode.
第１，２図からなかるように、本発明の一実施例の以上
までの構成は、従来技術の液晶デイスプレィと何ら変わ
らない。As can be seen from FIGS. 1 and 2, the configuration of the embodiment of the present invention up to this point is no different from that of the prior art liquid crystal display.
本発明の場合、一対の偏光板を画電極基板表面に所定の
レイアウトで貼り付ける前に、非接触の偏光板のレイア
ウトで表示状態の検査を行ない、明点欠陥部の検出を行
なう。即ち、全画素電極に電圧を印加すると、正常動作
部は液晶がＯＮし黒表示になるが、異常部は液晶部に電
圧が実質的にかからす、初期のまま明点欠陥になる。ノ
ーマリホワイトモードの場合、薄膜トランジスタ画素電
極間のオーブンモードが明点欠陥となる。前記検出した
明点欠陥部に対応する電極基板表面上の位置のみに光吸
収性の層１２を形成する。In the case of the present invention, before attaching a pair of polarizing plates to the surface of a picture electrode substrate in a predetermined layout, the display state is inspected in a non-contact polarizing plate layout to detect bright spot defects. That is, when a voltage is applied to all the pixel electrodes, the liquid crystal is turned on in the normal operating area and a black display is produced, but in the abnormal area, voltage is substantially applied to the liquid crystal area, resulting in a bright point defect in the initial state. In the normally white mode, the oven mode between the thin film transistor pixel electrodes becomes a bright point defect. A light-absorbing layer 12 is formed only at a position on the electrode substrate surface corresponding to the detected bright spot defect.
光吸収性の層を形成する方法としては種々考えられるが
本実施例においては、ネガ型フォトレジスト中にカーボ
ンフラッフの如き黒色顔料を均一分散させたものを均一
塗布し、しかる後に前記明点欠陥部のみを露光硬化させ
、その他を除去して完成させた。Various methods can be considered for forming the light-absorbing layer, but in this example, a black pigment such as carbon fluff is uniformly dispersed in a negative photoresist, and then the bright spot defects are uniformly coated. Only parts were exposed to light and cured, and the rest was removed.
上記欠陥部のみを選択的に露光させる簡便な方法として
、内部パターンはまったく同一でかつカラーフィルタ一
部を取り除いた以外はまったく本発明の液晶デイスプレ
ィと同一の液晶ティスプレィをマスクサイズに作成し、
まったく点欠陥のな゛い液晶デイスプレィをマスクにし
所定の欠陥部に対応する液晶ティスプレィマスクの画素
のみを０ＦＦＬその他をＯＮＬ、欠陥部のみ露光できる
ようにした。従って、本液晶デイスプレィマスクによる
露光バターニングを採用すれは本液晶ティスプレィで発
生するいかなる明点欠陥パターンにも対応できる。As a simple method of selectively exposing only the defective portions, a liquid crystal display having exactly the same internal pattern and the same size as the liquid crystal display of the present invention except for removing a portion of the color filter is prepared in the mask size.
Using a liquid crystal display with no point defects as a mask, only the pixels of the liquid crystal display mask corresponding to a predetermined defective part are 0FFL and others are ONL, so that only the defective part can be exposed. Therefore, by employing exposure patterning using the present liquid crystal display mask, it is possible to deal with any bright spot defect pattern that occurs in the present liquid crystal display.
以上のように明点欠陥部上に光吸収層を形成したものに
一対の偏光板を所定のレイアウトに貼り付け、液晶デイ
スプレィを完成させて、表示を確認した。明点欠陥部が
すべて黒点欠陥に変換されており、従来明点欠陥多数で
不良となるレベルのものが良品と判定されるしベルのも
のになった。A pair of polarizing plates were attached in a predetermined layout to the light absorption layer formed on the bright spot defect as described above, a liquid crystal display was completed, and the display was confirmed. All of the bright spot defects have been converted to black spot defects, and a product with many bright spot defects that would previously be considered defective has now been judged as a good product.
ご発明の効果〕
以上説明したように本発明は、従来表示上重大欠陥であ
る明点欠陥（実用上液晶ティスプレィ表示画面上、数個
あれば不良となる）部のみに光吸収層を選択的に付加形
成することて明点欠陥を黒点欠陥に変換し、本来不良と
なるべき製品から実用品質上問題ない液晶ティスプレィ
を容易に得ることができ、液晶ティスプレィ製造歩留が
犬山に改善される、という効果を有する。[Effects of the Invention] As explained above, the present invention selectively applies a light absorption layer only to bright spot defects (in practice, on a liquid crystal display screen, if there are only a few defects), which is a serious defect in conventional displays. It is possible to convert bright spot defects into black spot defects by forming additionally, and it is possible to easily obtain a liquid crystal display with no problems in practical quality from a product that would otherwise be defective, and the manufacturing yield of liquid crystal displays can be greatly improved. It has this effect.
また、本発明の製造方法によれは、明点欠陥を黒点欠陥
に変換し、液晶ティスプレィ製造歩留を改善することが
容易にできるという効果を有する。Furthermore, the manufacturing method of the present invention has the effect of easily converting bright point defects into black point defects and improving the manufacturing yield of liquid crystal displays.
第１図は本発明の一実施例を示す液晶ティスプレィの模
式的断面図、第２図は従来の技術から成る液晶デイスプ
レィの模式的断面図である。
■・・・・・・ガラス基板、２・・・・・カラーフィル
ターアレイ、３・・・・・・共通電極、４・・・・・・
配向膜、５・・・・力′ラス基板、６・・・・・・表示
画素電極、７・・・・・・トランジスタ、８・・・・・
・配線部、９・・・・・配向膜、１０・・・・液晶部、
１１．１２・・・・・偏光板、１３・・・・・・光吸収
層。
代理人 弁理士 内 原 晋
７、ＦランジスタFIG. 1 is a schematic cross-sectional view of a liquid crystal display according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of a conventional liquid crystal display. ■...Glass substrate, 2...Color filter array, 3...Common electrode, 4...
Alignment film, 5... Force base substrate, 6... Display pixel electrode, 7... Transistor, 8...
・Wiring part, 9...Alignment film, 10...Liquid crystal part,
11.12...Polarizing plate, 13...Light absorption layer. Agent: Patent Attorney Susumu Uchihara 7, F Langista
Claims (2)
物質を充填して成る液晶パネルを配置した液晶表示装置
において、前記一対の電極基板の一方の上には複数の画
素電極が形成され、前記一対の電極基板の他方には共通
電極が形成され、かつ前記液晶パネルを黒色表示した場
合に、明点欠陥となる、前記画素電極に対応する前記液
晶パネルの表面上の位置に、前記明点欠陥からもれてく
る光を吸収できる物質を含む層が形成されていることを
特徴とする液晶表示装置。(1) In a liquid crystal display device including a liquid crystal panel in which a liquid crystal material is filled between a pair of electrode substrates, at least one of which is transparent, a plurality of pixel electrodes are formed on one of the pair of electrode substrates, A common electrode is formed on the other of the pair of electrode substrates, and the bright spot is formed at a position on the surface of the liquid crystal panel corresponding to the pixel electrode, which causes a bright spot defect when the liquid crystal panel displays black. A liquid crystal display device characterized in that a layer containing a substance capable of absorbing light leaking from point defects is formed.
物質を分散させたフォトレジストを塗布する工程と、前
記明点欠陥部となる前記画素電極に対応する位置のみを
露光硬化させる工程と、硬化しなかった前記フォトレジ
ストを除去する工程とを含むことを特徴とする請求項（
１）記載の液晶表示装置の製造方法。(2) A step of applying a photoresist in which the light-absorbing substance is dispersed on the surface of the liquid crystal panel, and a step of exposing and curing only the position corresponding to the pixel electrode that becomes the bright spot defect. and removing the uncured photoresist.
1) The method for manufacturing the liquid crystal display device described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307689A JP2616224B2 (en) | 1990-11-14 | 1990-11-14 | Liquid crystal display device and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307689A JP2616224B2 (en) | 1990-11-14 | 1990-11-14 | Liquid crystal display device and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04178622A true JPH04178622A (en) | 1992-06-25 |
| JP2616224B2 JP2616224B2 (en) | 1997-06-04 |
Family
ID=17972040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2307689A Expired - Lifetime JP2616224B2 (en) | 1990-11-14 | 1990-11-14 | Liquid crystal display device and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2616224B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0534673A (en) * | 1991-07-18 | 1993-02-12 | Sharp Corp | Liquid crystal display device and luminescent point defect correcting method for liquid crystal display device |
| KR19990083581A (en) * | 1998-04-28 | 1999-11-25 | 모리시타 요이찌 | Liquid Crystal pannel and Method of manufacturing the same |
| US6080528A (en) * | 1998-07-31 | 2000-06-27 | International Business Machines Corporation | Camouflage of imaged post spacers and compensation of pixels that depart from nominal operating conditions by luminance diffusion by mechanical means |
| KR100441195B1 (en) * | 1996-09-09 | 2004-12-29 | 엘지.필립스 엘시디 주식회사 | Active matrix liquid crystal display device and a fabrication method thereof, specifically concerned with forming black matrices at the back of a substrate to make cell gaps uniform |
| KR100487429B1 (en) * | 2001-11-15 | 2005-05-03 | 엘지.필립스 엘시디 주식회사 | Method For Repairing A Defect Of Liquid Crystal Display Device And Liquid Crystal Display Device |
| JP2007241067A (en) * | 2006-03-10 | 2007-09-20 | Hitachi Displays Ltd | Liquid crystal display panel |
| CN100354728C (en) * | 2000-08-11 | 2007-12-12 | 夏普公司 | LCD and method for restoring defect on it |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03243917A (en) * | 1990-02-22 | 1991-10-30 | Sharp Corp | Liquid crystal display device |
-
1990
- 1990-11-14 JP JP2307689A patent/JP2616224B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03243917A (en) * | 1990-02-22 | 1991-10-30 | Sharp Corp | Liquid crystal display device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0534673A (en) * | 1991-07-18 | 1993-02-12 | Sharp Corp | Liquid crystal display device and luminescent point defect correcting method for liquid crystal display device |
| KR100441195B1 (en) * | 1996-09-09 | 2004-12-29 | 엘지.필립스 엘시디 주식회사 | Active matrix liquid crystal display device and a fabrication method thereof, specifically concerned with forming black matrices at the back of a substrate to make cell gaps uniform |
| KR19990083581A (en) * | 1998-04-28 | 1999-11-25 | 모리시타 요이찌 | Liquid Crystal pannel and Method of manufacturing the same |
| US6239856B1 (en) | 1998-04-28 | 2001-05-29 | Matsushita Electric Industrial Co., Ltd. | Liquid crystal panel and its manufacturing method |
| US6080528A (en) * | 1998-07-31 | 2000-06-27 | International Business Machines Corporation | Camouflage of imaged post spacers and compensation of pixels that depart from nominal operating conditions by luminance diffusion by mechanical means |
| CN100354728C (en) * | 2000-08-11 | 2007-12-12 | 夏普公司 | LCD and method for restoring defect on it |
| KR100487429B1 (en) * | 2001-11-15 | 2005-05-03 | 엘지.필립스 엘시디 주식회사 | Method For Repairing A Defect Of Liquid Crystal Display Device And Liquid Crystal Display Device |
| JP2007241067A (en) * | 2006-03-10 | 2007-09-20 | Hitachi Displays Ltd | Liquid crystal display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2616224B2 (en) | 1997-06-04 |
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