JP2684405B2 - Liquid crystal display cell - Google Patents
Liquid crystal display cellInfo
- Publication number
- JP2684405B2 JP2684405B2 JP4069289A JP4069289A JP2684405B2 JP 2684405 B2 JP2684405 B2 JP 2684405B2 JP 4069289 A JP4069289 A JP 4069289A JP 4069289 A JP4069289 A JP 4069289A JP 2684405 B2 JP2684405 B2 JP 2684405B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- display cell
- substrate
- cell
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は液晶表示用セルに関する。The present invention relates to a liquid crystal display cell.
最近、液晶の光学的異方性を利用した表示装置への応
用が各方面で進められており、特にテレビへの応用は目
をみはるものがある。Recently, application to a display device utilizing the optical anisotropy of liquid crystal has been advanced in various fields, and its application to a television is particularly remarkable.
しかし、液晶表示体の特徴として視角依存性が強いた
め、表示体として満足できるものではない。現在この改
良が色々行なわれており、DAP効果を利用する方法、二
色性色素を利用する方法、及び90度以上の螺旋構造をと
らせる方法等がしられている。However, since the liquid crystal display has a strong visual angle dependency, it is not satisfactory as a display. At present, various improvements have been made, including a method of utilizing a DAP effect, a method of utilizing a dichroic dye, and a method of forming a helical structure of 90 degrees or more.
これらの方法に共通する重要技術は液晶分子の初期配
向技術である。中でも前二者は初期配向において液晶分
子を基板に対しておおむね垂直に配向させる必要があ
る。An important technique common to these methods is an initial alignment technique for liquid crystal molecules. Among them, the former two need to orient the liquid crystal molecules substantially perpendicular to the substrate in the initial orientation.
従来の垂直配向技術はシラン系カップリング剤、パー
フルオロノナン酸クロム錯体等を塗布する方法であっ
た。The conventional vertical alignment technique has been a method of applying a silane coupling agent, a chromium perfluorononanoate complex, or the like.
しかしながら、クロム錯体を用いる場合、毒性に問題
があった。However, when using a chromium complex, there was a problem with toxicity.
また、これらの配向剤を用いる場合、膜自体を厚くで
きないため、基板からの影響（例えば、ナトリウムイオ
ン溶出による液晶の劣化）をふせぐことができない。Further, when these aligning agents are used, the thickness of the film itself cannot be increased, and therefore the influence from the substrate (for example, deterioration of liquid crystal due to elution of sodium ions) cannot be suppressed.
この欠点を防ぐため基板面にSiO2等をコートする必要
があり、量産性に劣る欠点がある。In order to prevent this drawback, it is necessary to coat the surface of the substrate with SiO 2 or the like, and there is a drawback that mass productivity is poor.
また、一般にこれらの配向剤は熱に弱いためセル作製
時、耐熱性無機シールや硬化温度の高い有機シールを使
用できない欠点がある。Further, since these aligning agents are generally weak to heat, there is a drawback that a heat-resistant inorganic seal or an organic seal having a high curing temperature cannot be used during cell production.
そこで本発明は前述のような欠点を解決しようとする
もので、その目的は、透明電極付き基板とスペーサより
なる液晶表示用セルにおいて、毒性がなく耐熱性のある
配向剤を用い、従来の配向基板より量産性が良く、コス
トの安い垂直配向材料をもちいた液晶表示用セルを提供
することにある。Therefore, the present invention is intended to solve the above-mentioned drawbacks, and an object thereof is to provide a liquid crystal display cell composed of a substrate with a transparent electrode and a spacer by using a non-toxic and heat-resistant aligning agent, and using a conventional alignment method. An object of the present invention is to provide a liquid crystal display cell that uses a vertical alignment material, which has better mass productivity than a substrate and is less expensive.
液晶が基板に対して垂直に配向し、SiO2の膜をコート
しなくても液晶の劣化がない本発明の液晶表示用セル
は、スペーサとスペーサを挟持した２枚の透明電極付き
基板よりなる液晶表示用セルにおいて、つぎの構造式を
有すポリアミド酸を含有する溶液を塗布した後、乾燥、
焼成した透明電極付き基板をもちいることを特徴とす
る。The liquid crystal is oriented vertically with respect to the substrate, and the liquid crystal display cell of the present invention does not deteriorate even if it is not coated with a SiO 2 film. In the liquid crystal display cell, after applying a solution containing a polyamic acid having the following structural formula, dried,
It is characterized by using a substrate with a fired transparent electrode.
（但し、ｎは正の整数を、Ｒは水素またはアルキル基を
示す） 〔作 用〕 本発明の透明電極付き基板としては蒸着などの手段に
より一方の面の一部または全面にもうけた酸化スズもし
くは酸化インジウムなどの薄膜を透明電極として有する
ガラス板あるいはプラスチック板などを用いて、このよ
うな透明電極付き基板にポリアミド酸を塗布、乾燥、焼
成することによりポリイミド酸を作製する。このためポ
リイミド樹脂の特徴である耐熱性に優れた配向膜とな
る。 (However, n is a positive integer, and R is hydrogen or an alkyl group.) [Operation] As the substrate with a transparent electrode of the present invention, tin oxide deposited on a part or the whole of one surface by means such as vapor deposition. Alternatively, a glass plate or a plastic plate having a thin film of indium oxide or the like as a transparent electrode is used, and a polyamic acid is applied to such a substrate with a transparent electrode, dried, and baked to produce a polyamic acid. Therefore, the alignment film has excellent heat resistance, which is a characteristic of the polyimide resin.
液晶をセルに充填することにより膜中の高分子側鎖で
ある液晶分子状の基 が基板からはなれほぼ垂直となる。この基に規制され液
晶分子はこの基と同方向に向こうとする。この結果液晶
分子は基板に垂直に配向することになる。By filling the cell with liquid crystal, a liquid crystalline molecular group that is a polymer side chain in the film Is separated from the substrate and becomes almost vertical. Regulated by this group, the liquid crystal molecules try to go in the same direction as this group. As a result, the liquid crystal molecules are aligned vertically to the substrate.
この方法によれば膜厚を自由にコントロールできるた
め膜を厚目にすることによりナトリウム等の溶出による
液晶の劣化を防ぐことができる。According to this method, since the film thickness can be freely controlled, it is possible to prevent deterioration of the liquid crystal due to elution of sodium or the like by making the film thick.
以下、実施例により本発明の詳細を示す。 Hereinafter, the present invention will be described in detail with reference to examples.
第一図は本発明の実施例における基本構成をしめす液
晶表示用セルの断面図である。FIG. 1 is a cross-sectional view of a liquid crystal display cell showing a basic configuration in an embodiment of the present invention.
ITO透明電極付きガラス基板上にポリイミド系高分子
膜をつぎの方法により作成した。A polyimide polymer film was formed on a glass substrate with an ITO transparent electrode by the following method.
まずつぎの構造式を有すポリアミド酸のジメチルホル
ムアミド溶液（10重量パーセント）を基板上に薄く塗布
した後、回転数2000rpmで余分の塗布液をとばし薄膜化
した。First, a dimethylformamide solution of polyamic acid having the following structural formula (10 weight percent) was thinly coated on a substrate, and then an excess coating liquid was skipped at a rotation speed of 2000 rpm to form a thin film.
（但し、ｎは正の整数を示す） 得られた塗布基板を250℃、１時間、焼成し、ポリイ
ミド系高分子膜とした。 (However, n represents a positive integer.) The coated substrate obtained was baked at 250 ° C. for 1 hour to obtain a polyimide polymer film.
このような基板を２枚つくり、10μｍポリエステルス
ペーサを介して組立、ポリエステル膜を熱により半溶融
の状態にして接着した後、冷却し固定化した。Two such substrates were prepared and assembled through a 10 μm polyester spacer, and the polyester film was heated to be in a semi-molten state and bonded, and then cooled and fixed.
このようにして得られたセルに誘電異方性が負の液晶
であるEN−35（チッソ株式会社製）を充填して、試験を
おこなった。The cell thus obtained was filled with EN-35 (manufactured by Chisso Corporation), which is a liquid crystal having a negative dielectric anisotropy, and tested.
試験の結果、初期配向は非常に良く、経時変化も認め
られなかった。As a result of the test, the initial orientation was very good and no change with time was observed.
また、60℃における15ボルト、30Hzの通電エージング
においても、液晶表示用セルの劣化は認められなかっ
た。In addition, the deterioration of the liquid crystal display cell was not observed even at the current aging of 15 V and 30 Hz at 60 ° C.
以上実施例を述べたが、本発明は以上の実施例のみな
らず、広く液晶を垂直に配向させた製品などに応用が可
能である。Although the embodiments have been described above, the present invention can be applied not only to the above embodiments but also to a wide range of products in which liquid crystals are vertically aligned.
以上述べたように本発明によれば、耐熱性に優れ、液
晶に悪影響をあたえることなく、垂直配向性の優れた液
晶表示用セルを安価に提供できる。As described above, according to the present invention, it is possible to inexpensively provide a liquid crystal display cell that has excellent heat resistance, does not adversely affect the liquid crystal, and has excellent vertical alignment.
本発明は視野角の広い液晶ディスプレイ、特に液晶テ
レビ等への応用が考えられるものである。The present invention is considered to be applicable to a liquid crystal display having a wide viewing angle, particularly a liquid crystal television.
第１図は、本発明の液晶表示用セルの断面図である。 11……基板 12……電極 13……配向膜 14……液晶 FIG. 1 is a sectional view of a liquid crystal display cell of the present invention. 11 ... Substrate 12 ... Electrode 13 ... Alignment film 14 ... Liquid crystal
Claims (1)
の透明電極付き基板よりなる液晶表示用セルにおいて、
下記構造式を有するポリアミド酸を含有する溶液を塗布
した後、乾燥、焼成した透明電極付き基板を用いること
を特徴とする液晶表示用セル。 （但し、ｎは正の整数を、Ｒは水素またはアルキル基を
示す）1. A cell for liquid crystal display comprising a spacer and two substrates with transparent electrodes sandwiching the spacer,
A liquid crystal display cell comprising a substrate with a transparent electrode which is dried and baked after applying a solution containing a polyamic acid having the following structural formula. (However, n is a positive integer and R is hydrogen or an alkyl group.)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4069289A JP2684405B2 (en) | 1989-02-21 | 1989-02-21 | Liquid crystal display cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4069289A JP2684405B2 (en) | 1989-02-21 | 1989-02-21 | Liquid crystal display cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02220030A JPH02220030A (en) | 1990-09-03 |
| JP2684405B2 true JP2684405B2 (en) | 1997-12-03 |
Family
ID=12587609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4069289A Expired - Fee Related JP2684405B2 (en) | 1989-02-21 | 1989-02-21 | Liquid crystal display cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2684405B2 (en) |
-
1989
- 1989-02-21 JP JP4069289A patent/JP2684405B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02220030A (en) | 1990-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4273420A (en) | Liquid crystal display device | |
| US4278326A (en) | Liquid crystal display element | |
| US4869577A (en) | Ferroelectric liquid crystal display device having uniaxial alignment on both substrates | |
| US4911958A (en) | Liquid crystal device | |
| US5135678A (en) | Liquid crystal device | |
| JP2684405B2 (en) | Liquid crystal display cell | |
| JP2916801B2 (en) | Liquid crystal display cell | |
| JP2684428B2 (en) | Liquid crystal display cell | |
| JP2684404B2 (en) | Liquid crystal display cell | |
| JP2916809B2 (en) | Liquid crystal display cell | |
| JPH02208633A (en) | Liquid crystal display device | |
| JPH04294321A (en) | Ferroelectric liquid crystal element | |
| US5582882A (en) | Fluorine containing organo-polymeric material for alignment layer and liquid crystal display device employing the same | |
| JPS632094B2 (en) | ||
| JPS623929B2 (en) | ||
| JPH0830808B2 (en) | Liquid crystal element | |
| JPS62111236A (en) | Liquid crystal element | |
| JPS62211617A (en) | Liquid crystal display element | |
| KR830000607B1 (en) | LCD display device | |
| JPH01243026A (en) | Cell for liquid crystal display | |
| JPS6261126B2 (en) | ||
| JPS6253810B2 (en) | ||
| JPH048772B2 (en) | ||
| JPS5670527A (en) | Liquid-crystal display element | |
| JPH0786612B2 (en) | Liquid crystal panel manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |