JPH02238440A - Electrooptical device - Google Patents
Electrooptical deviceInfo
- Publication number
- JPH02238440A JPH02238440A JP5890189A JP5890189A JPH02238440A JP H02238440 A JPH02238440 A JP H02238440A JP 5890189 A JP5890189 A JP 5890189A JP 5890189 A JP5890189 A JP 5890189A JP H02238440 A JPH02238440 A JP H02238440A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- alignment
- coupling agent
- electro
- substrates
- 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 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000007822 coupling agent Substances 0.000 claims description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 125000003277 amino group Chemical group 0.000 claims description 5
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 12
- 238000002834 transmittance Methods 0.000 abstract description 11
- 239000000758 substrate Substances 0.000 abstract description 10
- 238000001354 calcination Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 12
- 230000003287 optical effect Effects 0.000 description 8
- 229920000620 organic polymer Polymers 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- DVYVMJLSUSGYMH-UHFFFAOYSA-N n-methyl-3-trimethoxysilylpropan-1-amine Chemical compound CNCCC[Si](OC)(OC)OC DVYVMJLSUSGYMH-UHFFFAOYSA-N 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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］
本発明は強誘電性液晶を用いた電気光学装置の配向方法
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an alignment method for an electro-optical device using ferroelectric liquid crystal.
［従来の技術コ
従来、表示コントラストが高《光透過性のすぐれた強誘
電性液晶を用いた電気光学装置の液晶配向法として、Ｓ
ｉＯの斜方蒸着法が用いられてきた（第１２回液晶討論
会予稿集１連ＩＦ１ ２ （ ｐ３２）あるいはＪａｐ
ａｎ Ｄｉｓｐｌａｙ ’８６予稿集１２．３（ｐ
４６４））。この方法Ｋよれば、高分子配向膜を布でこ
する配向法の場合に得られる光学特性よりも格段にすぐ
れたコントラスト，透過率が得られる。またポリビニル
アルコールなどを配向膜に用い通電配向処理を施すこと
により２安定状態間の開き角を大きくすることができる
方法も提案されている。これは第２図に示したように、
通常の有機高分子配向膜を用いると強誘電性液晶分子の
安定状態は２３と２４であるが、通電配向処理（数十Ｖ
数十Ｈｚの交流電界印加）を施すと安定状態が２１と
２２になり開き角が最も広い状態になる（第１４回液晶
討論会予稿集３Ｂ１１５．３Ｂ１２２）。[Conventional technology] S
The oblique evaporation method of iO has been used (Proceedings of the 12th Liquid Crystal Conference 1 Series IF1 2 (p32) or Jap
an Display '86 Proceedings 12.3 (p.
464)). According to this method K, much better contrast and transmittance can be obtained than the optical properties obtained in the case of an alignment method in which the polymer alignment film is rubbed with a cloth. Furthermore, a method has been proposed in which the opening angle between two stable states can be increased by using polyvinyl alcohol or the like as an alignment film and subjecting it to an energized alignment treatment. As shown in Figure 2, this
When a normal organic polymer alignment film is used, the stable states of ferroelectric liquid crystal molecules are 23 and 24, but the current alignment treatment (several tens of V)
When an alternating current electric field of several tens of Hz is applied), the stable states become 21 and 22, and the opening angle becomes the widest state (Proceedings of the 14th Liquid Crystal Conference 3B115.3B122).
［発明が解決しようとする課題］
しかし斜方蒸着法では、大画面化が難しい、配向の経時
変化が激しい、取扱いが難しい、などの課工があり、通
電配向法では表示の残像が生じるなどの問題点を有する
。[Problems to be solved by the invention] However, the oblique evaporation method has problems such as difficulty in increasing the screen size, severe changes in orientation over time, and difficulty in handling, while the current orientation method causes display afterimages. It has the following problems.
そこで本発明では、ラビング法と通電配向法を組み合わ
せる方法において配向剤を最適化することにより透過率
，コントラスト，表示安定性の高い液晶電気光学装置を
作成することを目的とするものである。Therefore, an object of the present invention is to create a liquid crystal electro-optical device with high transmittance, contrast, and display stability by optimizing the alignment agent in a method that combines a rubbing method and an energization alignment method.
［課題を解決するための手段コ
本発明の電気光学装置は、
■ 強誘電性液晶を用いた電気光学装置において、液晶
の配向処理方法として配向膜にアミン基を有するカップ
リング剤を用いラビング法および通電配向法を組合わせ
ることを特徴とする。[Means for Solving the Problems] The electro-optical device of the present invention includes: (1) In an electro-optical device using a ferroelectric liquid crystal, a rubbing method is used as a method for aligning the liquid crystal using a coupling agent having an amine group in the alignment film. The method is characterized by a combination of the method and the energization orientation method.
■ 上記カップリング剤中のアミ７基が２級あるいは３
級であることを特徴とする。■ The amine 7 group in the above coupling agent is secondary or tertiary.
It is characterized by being a class.
■ 上記カップリング剤がシランカップリング剤である
ことを特徴とする。(2) The coupling agent is a silane coupling agent.
■ 上記カップリング剤がチタネートカップリング剤で
あることを特徴とする。(2) The coupling agent is a titanate coupling agent.
［作用コ
本発明の上記の構成によれば、液晶分子の開き角は４０
°前後となりクロスニコル下では高透過率高コントシス
トな表示を行なうことができる。[Function] According to the above structure of the present invention, the opening angle of the liquid crystal molecules is 40
It is possible to perform a display with high transmittance and high contrast under crossed nicol conditions.
またアミ７基を２級あるいは６級としたことでアミノ基
の塩基性が和らぎ信頼性が向上する。Furthermore, by making the amine 7 group secondary or 6th class, the basicity of the amino group is softened and reliability is improved.
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.
［実施例］
（実施例１）
第１図は本発明の実施例における基本構成を示す電気光
学装置の断面図である。ここでは、配向剤としてＮ−メ
チル ３−アミノプロピルトリメトキシシラン（あ）を
用いた実施例を示す。[Example] (Example 1) FIG. 1 is a sectional view of an electro-optical device showing the basic configuration in an example of the present invention. Here, an example using N-methyl 3-aminopropyltrimethoxysilane (A) as the alignment agent will be shown.
ＴＩＬ極（工ＴＯを使用したがこれに限らない）２と絶
縁膜（Ｓｉｎ，を使用したがこれに限らない）６を設け
た基板１に（あ）［１２％エタノール溶液を塗布し、１
００℃で６０分焼成後エタノール洗浄し、再び１００℃
で３０分焼成した。こうして得られた２枚の基板を布で
こすり、こすった方向が上下基板で反平行となる様に組
み合わせた。(A) A 12% ethanol solution was applied to a substrate 1 provided with a TIL electrode (not limited to, but not limited to) 2 and an insulating film (sin, but not limited to) 6.
After baking at 00℃ for 60 minutes, wash with ethanol and bake at 100℃ again.
Baked for 30 minutes. The two substrates thus obtained were rubbed with a cloth and combined so that the directions of the rubbing were antiparallel to the upper and lower substrates.
間隙幅は２μｍとしたが１μｍから１０μｍの間であれ
ばよい。次に液晶を封入するが、ここで用いた液晶は大
日本インキ（株）製のＤＯＩＦＯＯＯ４である。もちろ
ん他の液晶でもよい。ここで用いた（あ）はアルキル部
炭素＠３個であるが、炭素数が１個以上であればよい。Although the gap width was set to 2 μm, it may be between 1 μm and 10 μm. Next, a liquid crystal was sealed, and the liquid crystal used here was DOIFOOOO4 manufactured by Dainippon Ink Co., Ltd. Of course, other liquid crystals may be used. Although (A) used here indicates that the alkyl moiety has @3 carbon atoms, it is sufficient if the number of carbon atoms is 1 or more.
メトキシ基は３個でな《ともよ《、また他の反応性基で
もよい。また、窒素に結合しているメチル基は他のアル
キル基でもよいがあまり炭素数が増えると垂直配向する
ので３個以下がよい。また窒素に結合しているアルキル
基あるいは官能基の数は結合部を除いて１個あるいは２
個である。こうして作製した装置に±３０Ｖ １５Ｈ
Ｚの矩形波を印加して通電配向処理し、第３図（α）に
示した駆動波形を印加して、クロスニコル下で光学特性
を評価した。光学特性を第３図（ｂ）に示した。図中の
破線は、有機高分子配向膜を用いた場合の光学応答を示
している。The number of methoxy groups is not limited to three, and other reactive groups may also be used. Further, the methyl group bonded to nitrogen may be another alkyl group, but if the number of carbon atoms increases too much, it will be vertically aligned, so it is preferable to have 3 or less. Also, the number of alkyl groups or functional groups bonded to nitrogen is 1 or 2, excluding the bond.
It is individual. ±30V 15H to the device thus created
A rectangular wave of Z was applied to carry out an energization alignment treatment, and a drive waveform shown in FIG. 3 (α) was applied to evaluate optical characteristics under crossed Nicol conditions. The optical characteristics are shown in FIG. 3(b). The broken line in the figure indicates the optical response when an organic polymer alignment film is used.
本実施例におけるコントラストは４０：１、透過率８０
％（偏光子と検光子を平行にした場合を１００％として
）であった。従来例で有機高分子配向膜を用いた場合の
フントラストは８：１、透過率１５％であるから格段の
差である。また、この装置を１カ月間放置して再び表示
を行なうと問題なく表示できた。In this example, the contrast is 40:1 and the transmittance is 80.
% (the case where the polarizer and analyzer are parallel is set as 100%). In the conventional example, when an organic polymer alignment film is used, the mount last is 8:1 and the transmittance is 15%, which is a significant difference. Furthermore, when this device was left unused for a month and the display was performed again, the display was possible without any problem.
（実施例２）
本実施例では、配向剤としてビス（２−ヒドロキシエチ
ル）−６−アミノプロビルトリエトキシシラン（い）を
用いた場合について説明する。(Example 2) In this example, a case will be described in which bis(2-hydroxyethyl)-6-aminoprobyltriethoxysilane (i) is used as the alignment agent.
実施例１において（あ）の替わりにチッソ（株）製の（
い） ［１２％エタノール溶液を用いた。シランカップ
リング剤はここに挙げたものでな《とも２級あるいは３
級のアミ７基を有し１つ以上のアルコキシ基を有する構
造であればよい。ここで用いた液晶はヘキスト（株）製
の？ｅ’ｌｉｘＤＯ１である。こうして作製した装置に
±３（ｌｌＶ３０Ｈｚの矩形波を印加して通電配向処理
し、第３図（α）に示した駆動波形を印加して、クロス
ニフル下で光学特性を評価した。コントラストは６５：
１、透過率７７％であクた。信頼性については実施例１
と同様に良好であった。In Example 1, (A) was replaced with (A) manufactured by Chisso Corporation.
) [A 12% ethanol solution was used. The silane coupling agent is not listed here.
It may be any structure as long as it has 7 amino groups of the same class and one or more alkoxy groups. Is the liquid crystal used here made by Hoechst? It is e'lixDO1. The thus fabricated device was subjected to energization alignment treatment by applying a rectangular wave of ±3 (llV 30 Hz), and the driving waveform shown in FIG. 3 (α) was applied to evaluate the optical characteristics under a crossed nifle.
1. The transmittance was 77%. Regarding reliability, see Example 1
It was just as good.
（実施例３）
本実施例では、配向剤としてイソプロピルトリ（Ｕ，Ｎ
−：，＞メチルーエチルアミノ）チタネート（う）を用
いた場合について説明する。(Example 3) In this example, isopropyl tri(U,N
The case where -:,>methyl-ethylamino) titanate (U) is used will be explained.
実施例１において（あ）の替わりに味の素（株）ｉ１１
ノＫＲ−４３ ０．２％インブロバノール溶液ヲ用い
た。チタネートはここに挙げたものでな《とも２級ある
いは３級のアミノ基を有し１つ以上のアルコキシ基を有
する構造のチタネートであればよい。ここで用いた液晶
はヘキスト（株）製のＦθｌｉＸＯＯ１である。こうし
て作製した装置Ｋ±３ｏｖ １５Ｈｚの矩形波を印加
して通電配向処理し、第６図（α）に示した駆動波形を
印加して、クロスニコル下で光学特性を評価した。コン
トラストは５０：１、透過率７５％であった。信頓性に
ついては実施例１と同様に良好であった。In Example 1, Ajinomoto Co., Inc. i11 was used instead of (a).
KR-43 0.2% inbrobanol solution was used. The titanate is not listed here, but any titanate having a structure having a secondary or tertiary amino group and one or more alkoxy groups may be used. The liquid crystal used here is FθliXOO1 manufactured by Hoechst Co., Ltd. The device thus produced was subjected to energization alignment treatment by applying a rectangular wave of K±3ov 15 Hz, and the optical characteristics were evaluated under crossed Nicol conditions by applying the driving waveform shown in FIG. 6 (α). The contrast was 50:1 and the transmittance was 75%. Concerning credibility, it was as good as in Example 1.
（実施例４）
本実施例では、配向剤としてシランカップリング剤を混
合して用いた場合について説明する。用いたカップリン
グ剤は実施例１および実施例２で用いた（あ）および（
い）である。各配向剤０．２％エタノール溶液を実施例
１と同様に処理し組み立てた。用いた液晶はチッソ（株
）製のＤＯＦＯ００４である。こうして作製した装置に
±３０Ｖ２０ＨＺの矩形波を印加して通電配向処理し、
第６図（α）に示した駆動波形を印加して、クロスニコ
ル下で光学特性を評価した。コントラストは４０：１、
透過率８０％であった。信頼性については実施例１と同
様に良好であった。このように配向剤を混合して用いる
ことができるのでそれぞれの配向剤の特性を組み合わせ
ることができる。(Example 4) In this example, a case will be described in which a silane coupling agent is mixed and used as an alignment agent. The coupling agents used were (A) and (A) used in Example 1 and Example 2.
). Each alignment agent 0.2% ethanol solution was treated and assembled in the same manner as in Example 1. The liquid crystal used was DOFO004 manufactured by Chisso Corporation. A rectangular wave of ±30V20HZ was applied to the device thus produced to carry out an energization alignment process,
The optical characteristics were evaluated under crossed Nicol conditions by applying the driving waveform shown in FIG. 6 (α). Contrast is 40:1,
The transmittance was 80%. The reliability was as good as in Example 1. Since alignment agents can be mixed and used in this way, the characteristics of each alignment agent can be combined.
以上配向剤の処理濃度は［］．２％としたがα０００１
％でも全面均一な配向が得られた。これは基板表面に１
分子層が形成されれば充分配向剤として機能するからで
あると考えられる。また１００％濃度の配向剤を塗布し
てもその後水洗すれば過剰分を除《ことができるので問
題ない。布でこする処理は、配向剤塗布前に行なっても
よい。The treatment concentration of the alignment agent is [ ]. It was set as 2%, but α0001
%, uniform orientation was obtained over the entire surface. This is 1 on the board surface.
This is believed to be because the formation of a molecular layer sufficiently functions as an alignment agent. Furthermore, even if a 100% concentration alignment agent is applied, there is no problem since the excess can be removed by washing with water afterwards. The treatment of rubbing with a cloth may be performed before applying the alignment agent.
本発明は以上の実施例のみならず、広く液晶を用いた電
気光学装置などに応用が可能である。The present invention can be applied not only to the above embodiments but also to a wide variety of electro-optical devices using liquid crystals.
［発明の効果］
以上述べたように本発明によれば配向剤の最適化、ラビ
ング処理および通電配向処理により、コントラスト、透
過率および信頼性が向上するという効果を有する。[Effects of the Invention] As described above, according to the present invention, the contrast, transmittance, and reliability are improved by optimizing the alignment agent, rubbing treatment, and energization alignment treatment.
第１図は、本発明の基本構成を表す電気光学装置の断面
図である。
１・・・・・・・・・基 板
２゜゜・・・・・・・電極
３・・・・・・・・・絶縁層
４・・・・・・・・・配向層
５・・・・・・・・・液晶層
６・・・・・・・・・配向層
７・・・・・・・・・絶縁層
８・・・・・・・・・電 極
９・・・・・・・・・基 板
第２図は、強誘電性液晶を用いた装置の動作原埋を示す
概念図である。
２１，２２・・・・・・電界印加状態あるいは通電配向
処理後の安定状態
２３．２４・・・・・・有機高分子配向膜を用いた場合
の安定状態
２５・・・・・・電極基板
２６・・・・・・液晶分子の動き得る範囲２７・・・・
・・自発分極
２８・・・・・・液晶分子
第３図は、
本発明の電気光学装置を評価する際
に用いた駆動波形と光学応答を示す図である。
以
上FIG. 1 is a sectional view of an electro-optical device showing the basic configuration of the present invention. 1...Substrate 2゜゜...Electrode 3...Insulating layer 4...Alignment layer 5... ......Liquid crystal layer 6...Alignment layer 7...Insulating layer 8...Electrode 9... ...Substrate Figure 2 is a conceptual diagram showing the operation principle of a device using ferroelectric liquid crystal. 21, 22... Stable state after electric field application state or energized alignment treatment 23.24... Stable state when using organic polymer alignment film 25... Electrode substrate 26... Range of movement of liquid crystal molecules 27...
...Spontaneous polarization 28...Liquid crystal molecule FIG. 3 is a diagram showing the driving waveform and optical response used in evaluating the electro-optical device of the present invention. that's all
Claims (4)
晶の配向処理方法として配向膜にアミノ基を有するカッ
プリング剤を用いラビング法および通電配向法を組合わ
せることを特徴とする電気光学装置。(1) An electro-optical device using a ferroelectric liquid crystal, characterized in that the alignment treatment method for the liquid crystal is a combination of a rubbing method and a current alignment method using a coupling agent having an amino group in the alignment film. .
３級であることを特徴とする請求項１記載の電気光学装
置。(2) The electro-optical device according to claim 1, wherein the amino group in the coupling agent is secondary or tertiary.
ることを特徴とする請求項１記載の電気光学装置。(3) The electro-optical device according to claim 1, wherein the coupling agent is a silane coupling agent.
であることを特徴とする請求項１記載の電気光学装置。(4) The electro-optical device according to claim 1, wherein the coupling agent is a titanate coupling agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5890189A JPH02238440A (en) | 1989-03-10 | 1989-03-10 | Electrooptical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5890189A JPH02238440A (en) | 1989-03-10 | 1989-03-10 | Electrooptical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02238440A true JPH02238440A (en) | 1990-09-20 |
Family
ID=13097708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5890189A Pending JPH02238440A (en) | 1989-03-10 | 1989-03-10 | Electrooptical device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02238440A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012523581A (en) * | 2009-04-09 | 2012-10-04 | エルジー・ケム・リミテッド | Alignment film composition, alignment film manufactured thereby, method for manufacturing alignment film, optical film including the same, and display device including optical film |
-
1989
- 1989-03-10 JP JP5890189A patent/JPH02238440A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012523581A (en) * | 2009-04-09 | 2012-10-04 | エルジー・ケム・リミテッド | Alignment film composition, alignment film manufactured thereby, method for manufacturing alignment film, optical film including the same, and display device including optical film |
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