JPH03107926A - Cell for liquid crystal display - Google Patents
Cell for liquid crystal displayInfo
- Publication number
- JPH03107926A JPH03107926A JP24756389A JP24756389A JPH03107926A JP H03107926 A JPH03107926 A JP H03107926A JP 24756389 A JP24756389 A JP 24756389A JP 24756389 A JP24756389 A JP 24756389A JP H03107926 A JPH03107926 A JP H03107926A
- Authority
- JP
- Japan
- Prior art keywords
- substrates
- liquid crystal
- crystal display
- cell
- formula
- 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 32
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 3
- 239000001257 hydrogen Substances 0.000 claims abstract description 3
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 229920005575 poly(amic acid) Polymers 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 229920001721 polyimide Polymers 0.000 abstract description 5
- 238000001035 drying Methods 0.000 abstract description 4
- 239000004642 Polyimide Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 229920006254 polymer film Polymers 0.000 abstract description 3
- 239000010409 thin film Substances 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract description 2
- 239000004952 Polyamide Substances 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 3
- 229920002647 polyamide Polymers 0.000 abstract 3
- 238000001354 calcination Methods 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 231100000956 nontoxicity Toxicity 0.000 abstract 1
- 239000010408 film Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- UZUFPBIDKMEQEQ-UHFFFAOYSA-M 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluorononanoate Chemical compound [O-]C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F UZUFPBIDKMEQEQ-UHFFFAOYSA-M 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は液晶表示用セルに開本る。[Detailed description of the invention] [Industrial application field] The present invention is directed 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, applications to display devices utilizing the optical anisotropy of liquid crystals have been progressing in various fields, and the application to televisions is particularly eye-catching.
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。However, since a liquid crystal display is characterized by strong viewing angle dependence, it is not satisfactory as a display.
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。Currently, various improvements are being made to this, including methods that utilize the DAP effect, methods that utilize dichroic dyes, and methods that create 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
をセル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 technology common to these methods is the initial alignment technology of liquid crystal molecules. Among these, the first two require liquid crystal molecules to be aligned approximately perpendicular to the cell substrate in the initial alignment.
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。Conventional vertical alignment techniques involve applying a silane coupling agent, a chromium perfluorononanoate complex, or the like.
（Ｊ！明が解決しようとする課題〕
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。(Problem that J! Ming is trying to solve) 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Ｗ（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。In addition, when using these alignment agents, the film itself cannot be made thick, so it is impossible to prevent shadows W from the substrate (for example, deterioration of liquid crystal due to sodium ion elution).
この欠点を防ぐため基板面に５ｉＯａ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 substrate surface with 5iOa or the like, which has the drawback of being inferior in mass productivity.
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。In addition, these alignment agents are generally sensitive to heat, so they have the disadvantage that heat-resistant inorganic seals and organic seals with high curing temperatures cannot be used when producing cells.
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 attempts to solve the above-mentioned drawbacks, and its purpose is to use a non-toxic and heat-resistant alignment agent in a liquid crystal display cell consisting of a substrate with transparent electrodes and a spacer, and to solve the conventional alignment problem. The object of the present invention is to provide a liquid crystal display cell using a vertically aligned material that is easier to mass produce and is cheaper than a substrate.
液晶が基板に対して垂直に配向し、５ｉｄｅ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 display cell of the present invention, in which the liquid crystal is aligned perpendicularly to the substrate, and the liquid crystal does not deteriorate even without coating with a 5-ide film, is a liquid crystal display cell consisting of a spacer and two substrates with transparent electrodes sandwiching the spacer. In the display cell, after applying a solution containing polyamic acid having the following structural formula, drying,
It is characterized by the use of a fired substrate with transparent electrodes.
（但し、ｍは正の正数を、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膜を作製する。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, m is a positive number, and R is hydrogen or an alkyl group.) [Operation] The transparent electrode-equipped substrate of the present invention is made of tin oxide formed on a part of one surface or the entire surface by means such as vapor deposition. Alternatively, a polyimide film is produced by using a glass plate, a plastic plate, or the like having a thin film of indium oxide or the like as a transparent electrode, and applying polyamic acid to such a substrate with a transparent electrode, followed by drying and baking. Therefore, the alignment film has excellent heat resistance, which is a characteristic of 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（ＯＯＯＲ）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, the liquid crystal molecule-like groups (OOOR), which are polymer side chains in the film, separate from the substrate and become almost vertical. The liquid crystal molecules are regulated by this group and tend to face in the same direction as this group. As a result, the liquid crystal molecules are aligned perpendicular 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, the film thickness can be freely controlled, and by making the film thick, it is possible to prevent deterioration of the liquid crystal due to elution of sodium and the like.
以下、実施例により本発明の詳細を示す。Hereinafter, the details of the present invention will be shown by examples.
第１図は本発明の実施例における蔦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 the Tsutamoto structure in an embodiment of the present invention.
ＩＴＯ透明透明付極付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 prepared on a transparent ITO lath substrate with a polarized 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で金分の塗布液をとばし
薄膜化した。First, a dimethylformamide solution (10% by weight) of polyamic acid having the following structural formula was thinly applied onto a substrate, and then the gold coating solution was blown off at a rotational speed of 2000 rpm to form a thin film.
（但し、ｍは正の整数を示す）
得られた塗布基板を２５０°Ｃ１１時間、焼成し、ポリ
イミド系高分子膜とした。(However, m indicates a positive integer.) The obtained coated substrate was baked at 250° C. for 11 hours to form 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 made, assembled with a 10 μm polyester spacer interposed therebetween, the polyester film was heated to a semi-molten state and bonded together, 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 with 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 over time was observed.
また、６０”Ｃ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。Further, no deterioration of the liquid crystal display cell was observed even during aging at 15 volts 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, a liquid crystal display cell with excellent heat resistance and vertical alignment can be provided at low cost without adversely affecting the liquid crystal.
本発明は視野角の広い液晶デイスプレィ、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 can be applied to liquid crystal displays with a wide viewing angle, particularly liquid crystal televisions.
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 以 上 FIG. 1 is a sectional view of a liquid crystal display cell of the present invention. 11... Board 12...electrode 13...Alignment film 14...LCD Below Up
Claims (1)
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。 ▲数式、化学式、表等があります▼ （但し、ｍは正の正数を、Ｒは水素またはアルキル基を
示す）(1) In a liquid crystal display cell consisting of a spacer and two substrates with transparent electrodes sandwiching the spacer, the substrates with transparent electrodes are coated with a solution containing polyamic acid having the following structural formula, dried and fired. A liquid crystal display cell characterized in that it is used. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (However, m is a positive number and R is hydrogen or an alkyl group)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24756389A JP2684428B2 (en) | 1989-09-22 | 1989-09-22 | Liquid crystal display cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24756389A JP2684428B2 (en) | 1989-09-22 | 1989-09-22 | Liquid crystal display cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03107926A true JPH03107926A (en) | 1991-05-08 |
| JP2684428B2 JP2684428B2 (en) | 1997-12-03 |
Family
ID=17165357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24756389A Expired - Fee Related JP2684428B2 (en) | 1989-09-22 | 1989-09-22 | Liquid crystal display cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2684428B2 (en) |
-
1989
- 1989-09-22 JP JP24756389A patent/JP2684428B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2684428B2 (en) | 1997-12-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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