JPH03107925A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPH03107925A JPH03107925A JP24712889A JP24712889A JPH03107925A JP H03107925 A JPH03107925 A JP H03107925A JP 24712889 A JP24712889 A JP 24712889A JP 24712889 A JP24712889 A JP 24712889A JP H03107925 A JPH03107925 A JP H03107925A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display
- films
- pretilt
- 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 26
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 229920001721 polyimide Polymers 0.000 claims abstract description 11
- UWCWUCKPEYNDNV-LBPRGKRZSA-N 2,6-dimethyl-n-[[(2s)-pyrrolidin-2-yl]methyl]aniline Chemical compound CC1=CC=CC(C)=C1NC[C@H]1NCCC1 UWCWUCKPEYNDNV-LBPRGKRZSA-N 0.000 abstract description 6
- 239000011521 glass Substances 0.000 abstract description 5
- 239000004744 fabric Substances 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 7
- 239000004642 Polyimide Substances 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- WSFMFXQNYPNYGG-UHFFFAOYSA-M dimethyl-octadecyl-(3-trimethoxysilylpropyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CCC[Si](OC)(OC)OC WSFMFXQNYPNYGG-UHFFFAOYSA-M 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000010023 transfer printing 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、カイラル剤含有の液晶と二色性色素が垂直配
向となるように配向処理を行った液晶表示素子に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a liquid crystal display element in which a liquid crystal containing a chiral agent and a dichroic dye are aligned so that they are vertically aligned.
従来のポジ表示PC(相転移)モード液晶表示素子は、
第2図に示すような構造となっている。The conventional positive display PC (phase change) mode liquid crystal display element is
The structure is as shown in FIG.
即も、一対のガラス基板1A、IBの一面に透明電Ij
2A、2Bと垂直配向膜3A’ 、3B’ を順次形成
し、これらを微少間隔で対向させてセルを形成し、この
セル内にカイラル剤混合の液晶4と二色性色素5を封入
した構造となっている。垂直配向処理には、DMOAP
、0DS−E等シランカップリング剤を用いる。Immediately, a transparent electrode Ij is placed on one side of the pair of glass substrates 1A and IB.
2A, 2B and vertical alignment films 3A', 3B' are sequentially formed, these are opposed to each other at a minute interval to form a cell, and a liquid crystal 4 containing a chiral agent and a dichroic dye 5 are sealed in this cell. It becomes. For vertical alignment treatment, DMOAP
A silane coupling agent such as , 0DS-E is used.
この液晶表示素子は、対向する透明電極2A。This liquid crystal display element has transparent electrodes 2A facing each other.
2B間に電圧を印加すると、電圧無印加時にはガラス基
板IA、IBに対し垂直に配向していた液晶4及び二色
性色素5が水平方向にねじれて、色素5の着色により表
示が行われる。When a voltage is applied between 2B, the liquid crystal 4 and the dichroic dye 5, which were oriented perpendicularly to the glass substrates IA and IB when no voltage is applied, are twisted in the horizontal direction, and a display is performed by coloring the dye 5.
従来は、垂直配向処理にDMOAP、0DS−E等のシ
ランカップリング剤を用いているため、プレチルトを持
たない配向処理となり、電圧を印加した時に液晶分子の
倒れる方向が部所によって異なり、表示ムラが生じる。Conventionally, since silane coupling agents such as DMOAP and 0DS-E are used for vertical alignment processing, the alignment process does not have pretilt, and when a voltage is applied, the direction in which liquid crystal molecules fall differs depending on the location, resulting in display unevenness. occurs.
特に、液晶表示素子ね斜め方向から見た場合に大きなム
ラとなる。Particularly, large unevenness occurs when the liquid crystal display element is viewed from an oblique direction.
本発明の目的は、表示品質が高く、視認性が良好な液晶
表示素子を提供することにある。An object of the present invention is to provide a liquid crystal display element with high display quality and good visibility.
本発明は、一対の透明基板の一面に透明電極と垂直配向
膜を順次形成し、これらを微少間隔で対向させてセルを
形成し、このセル内にカイラル剤混合の液晶と二色性色
素を封入した液晶表示素子において、少なくとも一方の
基板側の垂直配向膜としてポリイミド膜を用い、この膜
をラビングすることによって所要角度のプレチルトを持
たせたことを特徴とするものである。In the present invention, a transparent electrode and a vertical alignment film are sequentially formed on one surface of a pair of transparent substrates, and these are opposed to each other at a minute interval to form a cell, and within this cell, a liquid crystal containing a chiral agent and a dichroic dye are placed. In the encapsulated liquid crystal display element, a polyimide film is used as a vertical alignment film on at least one substrate side, and this film is rubbed to give a pretilt of a required angle.
以下、本発明を図面に示す実施例に基づいて詳細に説明
する。Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
第1図は本発明の一実施例を示すもので、一対のガラス
基板IA、1[3の一面に透明電極2A。FIG. 1 shows an embodiment of the present invention, in which a transparent electrode 2A is formed on one surface of a pair of glass substrates IA, 1[3.
2Bと垂直配向ポリイミド膜3A、3Bを順次形成し、
膜を布(綿、ナイロン等)でラビングしてプレチルト(
角度θ)を持たせた後、微少間隔で対向させてセルを形
成し、このセル内にカイラル剤混合の液晶4と二色性色
素5を封入している。2B and vertically aligned polyimide films 3A and 3B are sequentially formed.
Rub the membrane with cloth (cotton, nylon, etc.) and pre-tilt it (
After forming an angle θ), a cell is formed by facing each other at a minute interval, and a liquid crystal 4 containing a chiral agent and a dichroic dye 5 are sealed in this cell.
前記垂直配向ポリイミドWA3A、3Bは、垂直配向タ
イプのポリイミドを用い、転写印刷、スピンナーコート
等で薄膜化し、100〜300℃で焼成することによっ
て成膜できる。The vertically oriented polyimides WA3A and 3B can be formed by using a vertically oriented polyimide, forming a thin film by transfer printing, spinner coating, etc., and baking at 100 to 300°C.
また、プレチルト角は、ラビング条件(布の種類、ラビ
ング強度、ラビング回数)により制御できる。その−例
としてラビング回数とプレチルト角の関係を数表に示す
。この例では、液晶にZLI−2806(メルク社製)
を使用した。Further, the pretilt angle can be controlled by rubbing conditions (type of cloth, rubbing intensity, number of times of rubbing). As an example, the relationship between the number of rubbings and the pretilt angle is shown in a table. In this example, the liquid crystal is ZLI-2806 (manufactured by Merck & Co.)
It was used.
このようにプレチルトを持たせると、対向する透明電極
2A、2B間に電圧を印加した時、液晶4の分子が一定
方向に揃って倒れ、水平方向にねじれる。このねじれに
伴い色素による着色表示が行われる。この表示はムラの
ない高品質のものとなる。また、斜め方向から見た場合
にも表示ムラがなくなり、視認性が良好となる。When a pretilt is provided in this way, when a voltage is applied between the opposing transparent electrodes 2A and 2B, the molecules of the liquid crystal 4 are aligned in a certain direction and are twisted in the horizontal direction. Along with this twisting, a colored display using a dye is performed. This display is uniform and of high quality. Further, even when viewed from an oblique direction, display unevenness is eliminated and visibility is improved.
なお、2枚の基板の一方だけをラビングしても均一な配
向を得ることができる。従って、垂直配向膜としてポリ
イミド膜を用いるのは一方の基板側だけでもよい。Note that even if only one of the two substrates is rubbed, uniform orientation can be obtained. Therefore, the polyimide film may be used only on one substrate side as the vertical alignment film.
以上のように本発明によれば、垂直配向膜としてポリイ
ミド膜を使用し、その膜をラビングすることによって所
要角度のプレチルトを持たせたので、オン時に液晶分子
が一定方向に倒れるようになり、表示ムラのない高品質
の表示となる。しかも、斜め方向から見た場合にも表示
ムラがなくなり、視認性が良好となる。また、プレチル
トを持つことにより、液晶分子が水平に倒れ易くなり、
低いしきい値電圧で立上がり時聞(レスポンスライスタ
イム)を短縮できる。更に、ポリイミド膜を用いたこと
により、液晶に対する配向の安定性が増し、信頼性の向
上が図れる。As described above, according to the present invention, a polyimide film is used as the vertical alignment film, and the film is rubbed to give it a pre-tilt of the required angle, so that the liquid crystal molecules are tilted in a certain direction when turned on. High-quality display with no display unevenness is achieved. Furthermore, even when viewed from an oblique direction, display unevenness is eliminated and visibility is improved. In addition, by having a pre-tilt, the liquid crystal molecules tend to fall horizontally,
The rise time (response time) can be shortened with a low threshold voltage. Furthermore, by using a polyimide film, the stability of alignment with respect to the liquid crystal increases, and reliability can be improved.
第1図は本発明に係る液晶表示素子の一実施例を示す構
造説明図、第2図は従来例を示す構造説明図である。
1A及び1B・・・ガラス基板
2A及び2B・・・透明電極
3A及び3B・・・垂直配向ポリイミド膜4・・・カイ
ラル剤混合の液晶
5・・・二色性色素FIG. 1 is a structural explanatory diagram showing one embodiment of a liquid crystal display element according to the present invention, and FIG. 2 is a structural explanatory diagram showing a conventional example. 1A and 1B...Glass substrates 2A and 2B...Transparent electrodes 3A and 3B...Vertical alignment polyimide film 4...Liquid crystal mixed with chiral agent 5...Dichroic dye
Claims (1)
形成し、これらを微少間隔で対向させてセルを形成し、
このセル内にカイラル剤混合の液晶と二色性色素を封入
した液晶表示素子において、少なくとも一方の基板側の
垂直配向膜としてポリイミド膜を用い、この膜をラビン
グすることによつて所要角度のプレチルトを持たせたこ
とを特徴とする液晶表示素子。A transparent electrode and a vertical alignment film are sequentially formed on one surface of a pair of transparent substrates, and these are made to face each other at a minute interval to form a cell.
In a liquid crystal display element in which a chiral agent-mixed liquid crystal and a dichroic dye are sealed in the cell, a polyimide film is used as a vertical alignment film on at least one substrate side, and by rubbing this film, a pretilt angle of a desired angle can be achieved. A liquid crystal display element characterized by having.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24712889A JPH03107925A (en) | 1989-09-22 | 1989-09-22 | Liquid crystal display element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24712889A JPH03107925A (en) | 1989-09-22 | 1989-09-22 | Liquid crystal display element |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03107925A true JPH03107925A (en) | 1991-05-08 |
Family
ID=17158850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24712889A Pending JPH03107925A (en) | 1989-09-22 | 1989-09-22 | Liquid crystal display element |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03107925A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5477359A (en) * | 1993-01-21 | 1995-12-19 | Sharp Kabushiki Kaisha | Liquid crystal projector having a vertical orientating polyimide film |
KR100225396B1 (en) * | 1996-10-31 | 1999-10-15 | 구자홍 | A method for manufacturing a multi-domain liquid crystal cell |
JP2001343648A (en) * | 2000-05-31 | 2001-12-14 | Asahi Glass Co Ltd | Liquid crystal display element |
US6507381B1 (en) | 1997-05-26 | 2003-01-14 | Sharp Kabushiki Kaisha | Liquid crystal panel having tilted liquid crystal molecules and liquid crystal display using the liquid crystal panel |
US7253861B2 (en) | 2000-12-28 | 2007-08-07 | Asahi Glass Company | Liquid crystal optical element comprising a resin layer having a surface hardness of b or less |
US7382430B2 (en) | 2000-12-28 | 2008-06-03 | Asahi Glass Company, Limited | Liquid crystal optical element and test method for its boundary layer |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5778518A (en) * | 1980-11-04 | 1982-05-17 | Seiko Epson Corp | Guest-host liquid display device |
JPH01204025A (en) * | 1988-02-10 | 1989-08-16 | Konica Corp | Liquid crystal display device and its production |
-
1989
- 1989-09-22 JP JP24712889A patent/JPH03107925A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5778518A (en) * | 1980-11-04 | 1982-05-17 | Seiko Epson Corp | Guest-host liquid display device |
JPH01204025A (en) * | 1988-02-10 | 1989-08-16 | Konica Corp | Liquid crystal display device and its production |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5477359A (en) * | 1993-01-21 | 1995-12-19 | Sharp Kabushiki Kaisha | Liquid crystal projector having a vertical orientating polyimide film |
KR100225396B1 (en) * | 1996-10-31 | 1999-10-15 | 구자홍 | A method for manufacturing a multi-domain liquid crystal cell |
US6222601B1 (en) | 1996-10-31 | 2001-04-24 | Lg Electronics, Inc. | Method of manufacturing a liquid crystal cell |
US6507381B1 (en) | 1997-05-26 | 2003-01-14 | Sharp Kabushiki Kaisha | Liquid crystal panel having tilted liquid crystal molecules and liquid crystal display using the liquid crystal panel |
JP2001343648A (en) * | 2000-05-31 | 2001-12-14 | Asahi Glass Co Ltd | Liquid crystal display element |
JP4572446B2 (en) * | 2000-05-31 | 2010-11-04 | 旭硝子株式会社 | Liquid crystal display element |
US7253861B2 (en) | 2000-12-28 | 2007-08-07 | Asahi Glass Company | Liquid crystal optical element comprising a resin layer having a surface hardness of b or less |
US7382430B2 (en) | 2000-12-28 | 2008-06-03 | Asahi Glass Company, Limited | Liquid crystal optical element and test method for its boundary layer |
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