JPH02287432A - Oriented film for liquid crystal and twisted nematic liquid crystal cell - Google Patents
Oriented film for liquid crystal and twisted nematic liquid crystal cellInfo
- Publication number
- JPH02287432A JPH02287432A JP10936589A JP10936589A JPH02287432A JP H02287432 A JPH02287432 A JP H02287432A JP 10936589 A JP10936589 A JP 10936589A JP 10936589 A JP10936589 A JP 10936589A JP H02287432 A JPH02287432 A JP H02287432A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- twisted nematic
- nematic liquid
- oriented film
- crystal 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.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 19
- 210000002858 crystal cell Anatomy 0.000 title claims abstract description 15
- 239000004988 Nematic liquid crystal Substances 0.000 title claims abstract description 14
- 229920000642 polymer Polymers 0.000 claims abstract description 8
- 230000001052 transient effect Effects 0.000 abstract description 3
- 239000002952 polymeric resin Substances 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 6
- 229920001721 polyimide Polymers 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 229920005575 poly(amic acid) Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000000126 substance Substances 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、高分子樹脂からなる液晶分子の配向膜、及び
これを使ったツウィスト・ネマティック液晶セルの製法
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an alignment film for liquid crystal molecules made of a polymer resin, and a method for manufacturing a twisted nematic liquid crystal cell using the same.
従来の技術
液晶分子の配向膜は、液晶デイスプレィには必須のもの
である。BACKGROUND OF THE INVENTION A liquid crystal molecule alignment film is essential for liquid crystal displays.
前記配向膜としては、無機質の斜方蒸着膜、布等で摩擦
（すなわちラビング）された高分子樹脂膜等が使われる
（液晶エレクトロニクスの基礎と応用、佐々木 昭夫編
）、高分子樹脂としては、主にポリイミドが使われる。As the alignment film, an inorganic obliquely vapor-deposited film, a polymer resin film rubbed with cloth, etc. is used (Basics and Applications of Liquid Crystal Electronics, edited by Akio Sasaki), etc. As the polymer resin, Polyimide is mainly used.
発明が解決しようとする課題
しかしながら、無機質の斜方蒸着膜については、装置が
比較的高価なこと、真空プロセスなのでプロセス・コス
トが高くつくことに難がある。Problems to be Solved by the Invention However, the problem with obliquely deposited inorganic films is that the equipment is relatively expensive and the process cost is high because it is a vacuum process.
一般に高分子樹脂膜、特にポリイミド膜のラビング法が
産業界では多用されている。ところが、これら高分子樹
脂膜は体積抵抗率がｌＱ’Ｑｃｍ程度あり、これは２つ
の問題をひき起こす。まず、高分子樹脂膜に厚みの不均
一が、液晶層にかかる電圧値を不均一にし、結果として
表示にムラを生じしめる。第二には、そもそも液晶セル
には表示の際、パルス電圧を配向膜−液晶層−配向膜の
縦続接合に印加されるが、配向膜に由来する電気抵抗が
高いとパルス電圧を印加した場合、過渡電流が大きく流
れ、表示の品質を損なう。In general, rubbing methods for polymer resin films, particularly polyimide films, are frequently used in industry. However, these polymer resin films have a volume resistivity of about 1Q'Qcm, which causes two problems. First, non-uniform thickness of the polymer resin film causes non-uniform voltage values applied to the liquid crystal layer, resulting in uneven display. Second, when displaying on a liquid crystal cell, a pulse voltage is applied to the cascade junction of alignment film, liquid crystal layer, and alignment film, but if the electrical resistance originating from the alignment film is high, when a pulse voltage is applied, , a large transient current flows, impairing display quality.
課題を解決するための手段
本発明は前述のような課題を解決するために、電荷移動
錯体を添加されてなる高分子をラビングしてなる液晶用
配向膜を提供するものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an alignment film for liquid crystal formed by rubbing a polymer added with a charge transfer complex.
特に、電荷移動錯体を添加されてなる高分子をラビング
してなる液晶用配向膜はツウィスト・ネマティック液晶
セルに効果的である。ツウィスト・ネマティック液晶セ
ルの内でも、液晶分子の捻れ角が約１８０”以上のネマ
ティ、り液晶セルに特に有効である。In particular, a liquid crystal alignment film formed by rubbing a polymer doped with a charge transfer complex is effective for twisted nematic liquid crystal cells. Among twisted nematic liquid crystal cells, it is particularly effective for nematic liquid crystal cells in which the twist angle of liquid crystal molecules is about 180'' or more.
作用
電荷移動錯体を添加されてなる高分子層、例えばポリイ
ミド層は、固有電気抵抗が下がり、前述の課題を大きく
解決する。これは電荷移動錯体に起因する。また、ポリ
イミド層が、これに接する液晶分子のプレチルト角を大
きくするような、すなわちＳＴＮ （スーパー：ツウイ
スト・ネマティック）用配向膜である場合、出来た５Ｔ
ＮＩ晶セルは、前述の課題ないし問題点を著しく解決す
る。A polymer layer, such as a polyimide layer, to which a functional charge transfer complex is added has a lower specific electrical resistance and largely solves the above-mentioned problems. This is due to charge transfer complexes. In addition, if the polyimide layer increases the pretilt angle of the liquid crystal molecules in contact with it, that is, if it is an alignment film for STN (super: twisted nematic), the resulting 5T
NI crystal cells significantly solve the above-mentioned problems.
また、添加する電荷移動錯体の量は０．１−１０Ｗ％が
望ましい。Further, the amount of the charge transfer complex added is preferably 0.1 to 10 W%.
実施例 以下、本発明の一実施例を説明する。Example An embodiment of the present invention will be described below.
本実施例では樹脂としてポリアミック酸樹脂（硬化重合
してポリイミド樹脂となる）、ＲＮ６２６（８産化学製
）を使用した。電荷移動錯体としてはＴＭＴＴＦ−ＯＤ
ＴＣＮＱ （日本カーワット製）を使用し、これが５Ｗ
％となるように前記ボリアミンク酸樹脂レジンに添加し
た。これをガラス基板−Ｆに印刷して、さらに、所定の
加熱処理により、イミド化させた。In this example, a polyamic acid resin (cured and polymerized to become a polyimide resin), RN626 (manufactured by Yasan Kagaku Co., Ltd.) was used as the resin. As a charge transfer complex, TMTTF-OD
I use TCNQ (manufactured by Nippon Karwat), which is 5W.
% to the polyamic acid resin resin. This was printed on a glass substrate-F and further imidized by a predetermined heat treatment.
さらに所定の方向に通常の方法でラビングした。Further, rubbing was performed in a predetermined direction using a conventional method.
このような基板、２枚を所定の方向に貼り合わセ、キラ
ル物質を適当に調合されたネマティック液晶を注入する
と、所望の光学的振舞いを示した。スーパー・・ンイス
テインド・ネマティックモードでも、表示の均一性も従
来より優れていた。また、ストライプ状の透明電極を上
に有する２枚のガラス基板を使用し、前述の如く、スー
パー・ツウィスト・ネマティック液晶セルを作製し、さ
らに駆動ＩＣを実装して、いわゆる６４０Ｘ４００絵素
を有する表示装置を作製した。この装置において、表示
コントラストは均一で、いわゆる表示のクロストークも
なくなり、従来に比べて格段の進歩を得た。When two such substrates were bonded together in a predetermined direction and a nematic liquid crystal containing an appropriately mixed chiral substance was injected, the desired optical behavior was exhibited. Even in super-contained nematic mode, the display uniformity was better than before. In addition, a super twisted nematic liquid crystal cell was fabricated as described above using two glass substrates having striped transparent electrodes thereon, and a driving IC was further mounted to display a display having so-called 640 x 400 picture elements. The device was created. This device has uniform display contrast and eliminates so-called display crosstalk, making it a significant improvement over conventional devices.
発明の効果
以上本発明は高品位の表示を得る液晶分子用配向膜を提
供するものであり、これは特にツウィスト・ネマティッ
ク液晶セルに使われた場合、有効性が著しい、従って、
産業上の価値は大なるものがある。Effects of the Invention The present invention provides an alignment film for liquid crystal molecules that provides high-quality display, and is particularly effective when used in twisted nematic liquid crystal cells.
It has great industrial value.
Claims (2)
してなる液晶用配向膜。(1) An alignment film for liquid crystal formed by rubbing a polymer added with a charge transfer complex.
してなる液晶用配向膜を使用したツウィスト・ネマティ
ック液晶セル。(2) Twisted nematic liquid crystal cell using a liquid crystal alignment film made by rubbing a polymer doped with a charge transfer complex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10936589A JPH02287432A (en) | 1989-04-28 | 1989-04-28 | Oriented film for liquid crystal and twisted nematic liquid crystal cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10936589A JPH02287432A (en) | 1989-04-28 | 1989-04-28 | Oriented film for liquid crystal and twisted nematic liquid crystal cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02287432A true JPH02287432A (en) | 1990-11-27 |
Family
ID=14508386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10936589A Pending JPH02287432A (en) | 1989-04-28 | 1989-04-28 | Oriented film for liquid crystal and twisted nematic liquid crystal cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02287432A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013527975A (en) * | 2010-03-12 | 2013-07-04 | テールズ | Solutions of conductive molecular materials, and electromagnetic wave absorbing materials produced from these solutions |
-
1989
- 1989-04-28 JP JP10936589A patent/JPH02287432A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013527975A (en) * | 2010-03-12 | 2013-07-04 | テールズ | Solutions of conductive molecular materials, and electromagnetic wave absorbing materials produced from these solutions |
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