JPH02158714A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPH02158714A JPH02158714A JP31426588A JP31426588A JPH02158714A JP H02158714 A JPH02158714 A JP H02158714A JP 31426588 A JP31426588 A JP 31426588A JP 31426588 A JP31426588 A JP 31426588A JP H02158714 A JPH02158714 A JP H02158714A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display element
- crystal display
- zone
- cover
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001887 tin oxide Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Abstract
Description
〔産業上の利用分野］
本発明はコンピューターやワープロの端末等などに用い
られる液晶表示素子に関する。
［従来の技術１
液晶表示素子に用いられる電極付き基板は平坦なものが
必要であり、特に２層式白黒スーパーツイスト型液晶素
子や強誘電性液晶素子では、カラーフィルターや補助配
線用の電極の凸凹により表示性能がそこなわれる為、平
坦化の膜が必要となっている。平坦な膜を得る為には凸
凹部を膜で覆った後に膜面を研磨する方法やプレスする
方法が取られる。さらに、該平坦化膿の上部に電極を配
置する事により、平坦化膜での電圧低下に起因する表示
性能の低下を回避する方策が取られる。
〔発明が解決しようとする課題１
前記平坦化膜を用いる場合、シール部外にあり外部駆動
回路との接続部に当てられる端子部に該平坦化膜がかか
ると、傷がつきやすい点や信頼性が出ないなどの問題点
を有していた。また、シール部の内側のみ平坦化膜を用
いた場合には、平坦化膜の基板間や基板内での膜厚分布
が原因となり液晶層々厚の均一なコントロールが出来な
い問題点を有していた。
そこで、本発明の目的とするところは、端子部の信頼性
を確保し、且つ液晶層々厚の均一なコントロールが可能
な平坦化膜を有する液晶表示素子を提供することにある
。[Industrial Application Field] The present invention relates to a liquid crystal display element used in computers, word processing terminals, etc. [Prior art 1] Substrates with electrodes used in liquid crystal display devices need to be flat, and in particular, in two-layer black and white super twist type liquid crystal devices and ferroelectric liquid crystal devices, electrodes for color filters and auxiliary wiring need to be flat. Since display performance is impaired by unevenness, a flattening film is required. In order to obtain a flat film, a method is used in which the uneven portions are covered with a film and then the film surface is polished or pressed. Further, by arranging an electrode above the flattened layer, a measure is taken to avoid deterioration in display performance due to voltage drop across the flattened film. [Problem to be Solved by the Invention 1] When using the flattening film, if the flattening film is applied to the terminal part that is outside the sealing part and is applied to the connection part with the external drive circuit, it may easily cause scratches and reduce reliability. It had problems such as lack of sexual expression. In addition, when a planarizing film is used only inside the sealing part, there is a problem in that the thickness distribution of the planarizing film between and within the substrates makes it impossible to control the thickness of the liquid crystal layers uniformly. Ta. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a liquid crystal display element having a flattening film that ensures reliability of terminal portions and allows uniform control of the thickness of each liquid crystal layer.
【課題を解決するための手段Ｊ
本発明の液晶表示素子は、各々パターン化された電極を
有する１対の透明基板と該基板を保持する為に設けられ
たシール部およびその中に封じ込められた液晶とからな
る液晶表示素子において、表面の凸凹を平坦にする為に
設けられた平坦化膜と、該平坦化膜上に電極を有し、か
つ、該平坦化膜がシール部領域にかかりなおかつ、端子
部領域にはかからない構造を有することを特徴とする。
【実 施 例Ｊ
第１図はカラーフィルターを有する液晶表示素子への一
実施例を示す図である０図においてｌＯｌはガラス基板
で、１０２はスズ酸化物かインジウム・スズ酸化物より
なる透明電極であり、１０３は液晶分子を配向させる為
に設けられた配向層であり本実施例ではポリイミド系の
配向膜を用いた。さらに１０４は液晶層であり本実施例
では誘電異方性が正のネマチック液晶を用いた。１０５
はシール部を表わし１０６はカラーフィルター層を表わ
している。１０７は平坦化膜であり、カラーフィルター
と電極の間に設けられている。カラーフィルターはゼラ
チンをパターン化し青、緑、赤の順で染色する事により
ガラス基板上に色画素を形成する染色法で作成した。平
坦化膜は感光性のアクリル樹脂をスクリーン印刷によっ
て５μｍ〜４０μｍの厚さに塗膜し８０〜１２０℃、３
０分でブレベークした後に、セリウム及びアルミナの研
磨粉を用いて研磨する事により平坦化を施こし、さらに
端子部を除いて紫外線が照射されるようパターン化され
たクロムマスクを用いて露光し、現像する事により平坦
化膜をパターン化した。さらに１８０℃で硬化させた後
に、インジウム・スズ酸化膜をスパッタにより形成し、
ポジ型レジストを用いたフォトプロセスにより電極パタ
ーンを形成した。このようにして作成したカラーフィル
ター付電極基板を用い、エポキシ系接着剤でシール部を
形成した後、液晶を封入し、液晶表示素子を形成した。
【発明の効果】
本発明により作成した液晶表示素子は、平坦化膜を有す
るにもかかわらず、充分実用に耐えつる信頼性を有し、
かつ、均一な液晶層々厚により、良好な表示性能を有す
るものであった。[Means for Solving the Problems J] The liquid crystal display element of the present invention comprises a pair of transparent substrates each having a patterned electrode, a seal portion provided to hold the substrates, and a transparent substrate sealed therein. A liquid crystal display element comprising a liquid crystal, which has a flattening film provided to flatten surface irregularities, an electrode on the flattening film, and the flattening film does not overlap the seal area. , is characterized by having a structure that does not extend over the terminal area. [Example J] Figure 1 is a diagram showing an example of a liquid crystal display element having a color filter. In Figure 0, lOl is a glass substrate, and 102 is a transparent electrode made of tin oxide or indium tin oxide. 103 is an alignment layer provided for aligning liquid crystal molecules, and in this example, a polyimide-based alignment film was used. Furthermore, 104 is a liquid crystal layer, and in this example, a nematic liquid crystal with positive dielectric anisotropy is used. 105
106 represents a seal portion, and 106 represents a color filter layer. A planarization film 107 is provided between the color filter and the electrode. The color filter was created using a dyeing method that forms color pixels on a glass substrate by patterning gelatin and dyeing it in the order of blue, green, and red. The flattening film was made by coating a photosensitive acrylic resin to a thickness of 5 μm to 40 μm by screen printing, and heating it at 80 to 120°C for 30 minutes.
After bre-baking for 0 minutes, it was flattened by polishing with cerium and alumina polishing powder, and then exposed using a patterned chrome mask so that ultraviolet rays were irradiated except for the terminals. The flattened film was patterned by development. After further curing at 180°C, an indium tin oxide film is formed by sputtering,
An electrode pattern was formed by a photo process using a positive resist. Using the color filter-equipped electrode substrate thus produced, a seal portion was formed with an epoxy adhesive, and then liquid crystal was sealed to form a liquid crystal display element. [Effects of the Invention] Despite having a flattening film, the liquid crystal display element produced according to the present invention has sufficient reliability for practical use.
Moreover, it had good display performance due to the uniform thickness of the liquid crystal layers.
第１図は本発明の一実施例を示す図。 出願人 セイコーエプソン株式会社 FIG. 1 is a diagram showing an embodiment of the present invention. Applicant: Seiko Epson Corporation
Claims (1)
基板を保持する為に設けられたシール部およびその中に
封じ込められた液晶とからなる液晶表示素子において、
表面の凸凹を平坦にする為に設けられた平坦化膜と、該
平坦化膜上に電極を有し、かつ、該平坦化膜がシール部
領域にかかりなおかつ、端子部領域にはかからない構造
を有することを特徴とする液晶表示素子。In a liquid crystal display element consisting of a pair of transparent substrates each having a patterned electrode, a seal part provided to hold the substrates, and liquid crystal sealed therein,
The structure includes a flattening film provided to flatten surface irregularities and an electrode on the flattening film, and the flattening film covers the seal area but does not cover the terminal area. A liquid crystal display element comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31426588A JPH02158714A (en) | 1988-12-13 | 1988-12-13 | Liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31426588A JPH02158714A (en) | 1988-12-13 | 1988-12-13 | Liquid crystal display element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02158714A true JPH02158714A (en) | 1990-06-19 |
Family
ID=18051275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31426588A Pending JPH02158714A (en) | 1988-12-13 | 1988-12-13 | Liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02158714A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7948569B2 (en) * | 1991-02-16 | 2011-05-24 | Semiconductor Energy Laboratory Co., Ltd. | Active matrix type display device |
-
1988
- 1988-12-13 JP JP31426588A patent/JPH02158714A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7948569B2 (en) * | 1991-02-16 | 2011-05-24 | Semiconductor Energy Laboratory Co., Ltd. | Active matrix type display device |
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