JPH0299925A - Liquid crystal element - Google Patents
Liquid crystal elementInfo
- Publication number
- JPH0299925A JPH0299925A JP25338988A JP25338988A JPH0299925A JP H0299925 A JPH0299925 A JP H0299925A JP 25338988 A JP25338988 A JP 25338988A JP 25338988 A JP25338988 A JP 25338988A JP H0299925 A JPH0299925 A JP H0299925A
- Authority
- JP
- Japan
- Prior art keywords
- film
- liquid crystal
- water surface
- substrate
- monomolecular
- 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 27
- 239000000758 substrate Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000010030 laminating Methods 0.000 claims abstract 2
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000011521 glass Substances 0.000 abstract description 11
- 239000007787 solid Substances 0.000 abstract description 6
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 239000010408 film Substances 0.000 description 24
- 238000000034 method Methods 0.000 description 11
- 239000002253 acid Substances 0.000 description 4
- 210000002858 crystal cell Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 125000003373 pyrazinyl group Chemical group 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 244000062793 Sorghum vulgare Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- 235000019713 millet Nutrition 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010409 thin film Substances 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
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】 産ｌ上二科朋公夏 本発明は液晶素子に関するものである。[Detailed description of the invention] Tomo Kimika The present invention relates to a liquid crystal element.
従来曵肢歪
液晶素子は、初期の頃の腕時計用のデイスプレィのよう
に、小さい面積に単純な数字を表示していたのに比較し
て今日では、パソコン用のデイスプレィのように大面積
の用途に用いられるようになってきた。また、画質を改
善するため、画素数も非常に多（なってきている。しか
しながら、液晶を配向させる方法は従来から行われてい
るラビング法が主流である。In the past, strain-distortion liquid crystal devices used to display simple numbers on a small area, such as displays for wristwatches in the early days, but today they are used for large-area applications such as displays for personal computers. It has come to be used for. Furthermore, in order to improve image quality, the number of pixels has become extremely large. However, the conventional method of aligning liquid crystals is the rubbing method.
パシよ゛と る 占
ラビング法は電極上に塗布された配向膜（通常はポリイ
ミド膜を用いる）を織布等で一定方向に擦るという単純
な方法であるため、低コストではあるが、大面積化と画
素数の増大が望まれるようになると表示の均一性が不十
分であったり、ラビング時の発塵による欠陥などが重大
な問題となってきた。一方、ラビングを行なわずに液晶
を配向させる方法としては斜方蒸着法がある。この方法
によれば良好な表示性能の液晶素子が製造できるが、蒸
着工程が重荷となり、大面積と低コスト化の面で問題を
残している。このため、ラビングせずに良好な初期配向
が能率良く得られる方法が求められていた。The passive rubbing method is a simple method of rubbing an alignment film (usually a polyimide film) coated on an electrode in a fixed direction with a woven cloth, etc., so it is low cost but can be applied over a large area. As the number of pixels increases and the number of pixels increases, problems such as insufficient display uniformity and defects due to dust generation during rubbing have become serious problems. On the other hand, as a method for aligning liquid crystal without rubbing, there is an oblique evaporation method. According to this method, a liquid crystal element with good display performance can be manufactured, but the vapor deposition process is burdensome, and problems remain in terms of large area and cost reduction. Therefore, there has been a need for a method that can efficiently obtain good initial alignment without rubbing.
占を ゛ るための
上記問題点を解決するために本発明の液晶素子は、少な
くとも電極層を形成した基板上に、分子の中央に剛直性
をもつコアを有し、しかも水面上に展開して単分子膜を
形成する性質を有する化合物を主成分とする単分子層を
１層以上積層してなる配向制御膜を備えたものである。In order to solve the above-mentioned problems regarding the liquid crystal display, the liquid crystal element of the present invention has a rigid core at the center of the molecule on a substrate on which at least an electrode layer is formed, and furthermore, the liquid crystal element has a core having a rigidity at the center of the molecule, and the liquid crystal element has a core on which at least an electrode layer is formed. The alignment control film is formed by stacking one or more monomolecular layers containing as a main component a compound having the property of forming a monomolecular film.
作且
本発明は上記した構成によってラビングなどの後処理を
施さずに、ムラの無い均一に配向された高品位な液晶素
子を容易に低コストで得ることができる。According to the present invention, with the above-described configuration, a high-quality liquid crystal element that is evenly and uniformly aligned can be easily obtained at low cost without performing post-processing such as rubbing.
実施週
以下本発明の一実施例の液晶素子について、図面を参照
しながら説明する。A liquid crystal device according to an embodiment of the present invention will be described below with reference to the drawings.
基板上に単分子膜を移し取る方法として従来よりラング
ミュア・ブロンＪ−’７ト（Ｌａｎｇｍｕｉｒ−Ｂｌｏ
ｄｇｅｔｔ ）法が一般的に用いられており、この方法
により得られた膜をＬＢ膜と呼んでいる。まず、分子の
中央に剛直性をもつコアを有し、しかも小分子膜形成能
のある化合物を有機溶剤中に熔解し、これを水面上に滴
下して水面上に展開させる。次いで、展開している膜を
一定表面圧に達するまで圧縮して行き、いわゆる固体膜
状態とする。さらに第２図に示すように固体膜の表面圧
を一定に保ちつつ、該固体膜を横切って、あらかじめ一
定のパターンのインジウム・錫酸化物よりなる透明電極
（ＴＴＯ電極）を形成したガラス基板を上下させ、基板
上に固体膜を移し取った。水面を横切る回数を変えるこ
とにより、所望の層数を累積した。面この時、第３図に
示すように透明電極の一端は導電性を確保するためＬＢ
膜を累積しなかった。また、ＩＴＯ電極上にあらかじめ
シリコン酸化物などの絶縁性薄膜を形成しておき、この
上からＬＢ膜を累積しても良い。こうしてＬ Ｂ膜を形
成した２枚のガラス基板をＬ Ｂ膜面どうしを対向させ
た状態に保持して、これを接着した。すなわち、第４図
に示すようにガラス基板の一部を除く四辺に、定直径の
ガラス繊維を分散した酸無水物硬化型エポキシ樹脂組成
物を印刷し、加圧状態のまま１５０℃で１時間加熱して
硬化し、２枚のガラス基板を接着した。こうして接着さ
れた２枚のガラス板をセルと称するが、この開口部から
減圧下で液晶を注入した。注入後、開］］部を酸無水物
硬化型エポキシ樹脂で封止し、第１図に示すような液晶
セルを完成した。Langmuir-Blo J-'7 is a conventional method for transferring a monomolecular film onto a substrate.
dgett) method is generally used, and the film obtained by this method is called an LB film. First, a compound that has a rigid core at the center of the molecule and has the ability to form a small molecule film is dissolved in an organic solvent, and this is dropped onto the water surface to spread it on the water surface. Next, the expanded membrane is compressed until it reaches a constant surface pressure, making it into a so-called solid membrane state. Furthermore, as shown in Fig. 2, while keeping the surface pressure of the solid film constant, a glass substrate on which a transparent electrode (TTO electrode) made of indium/tin oxide in a certain pattern was formed in advance across the solid film was attached. The solid film was transferred onto the substrate by moving it up and down. By varying the number of crossings of the water surface, the desired number of layers was accumulated. At this time, as shown in Figure 3, one end of the transparent electrode is connected to LB to ensure conductivity.
Did not accumulate membranes. Alternatively, an insulating thin film such as silicon oxide may be formed on the ITO electrode in advance, and an LB film may be accumulated thereon. The two glass substrates on which the LB films were formed in this way were held with their LB film surfaces facing each other and then bonded together. That is, as shown in Fig. 4, an acid anhydride-curable epoxy resin composition in which glass fibers of a constant diameter are dispersed is printed on all four sides of a glass substrate except for a part, and the composition is heated at 150°C for 1 hour under pressure. It was heated and cured, and the two glass substrates were bonded together. The two glass plates thus bonded together are called a cell, and liquid crystal was injected through the opening under reduced pressure. After injection, the open part was sealed with an acid anhydride-curable epoxy resin to complete a liquid crystal cell as shown in FIG.
本発明の分子の中央に剛直性をもつコアを有し、しかも
水面上に展開して単分子膜を形成する性質を有する化合
物とは、下式のように分子の中央にベンゼン環、ヘテロ
六員環、シクロヘキザン環など公知の液晶化合物にみら
れる剛直性をもつコアを有し、
Ｘ−（コア）−Ｙ
炭素数が５以上２２好ましくは１０〜Ｉ６のアルキル基
（不斉炭素を含んでもよい）をＸ中に含み、分子中、望
ましくはＹ中、さらに望ましくはＹ中の分子末端にＬＢ
膜材料で通常使われる親水性基（−ＣＯＯＩＩ、 −Ｃ
ＯＯＣＨａ 、 −０ｆｆ 、 −０Ｃ１＋３ 、−Ｃ
Ｎ、 −ＣＯＮＩＩ２ＮＨＣＯＣＩ＋３ 、 −Ｎ）ｈ
、−ＮＭｅ２等）を含んでいる化合物である。The compounds of the present invention that have a rigid core at the center of the molecule and have the property of forming a monomolecular film by expanding on the water surface are compounds with a benzene ring at the center of the molecule and a hetero6, as shown in the formula below. It has a core with rigidity found in known liquid crystal compounds such as a membered ring or a cyclohexane ring, ) in X, and LB in the molecule, preferably in Y, more preferably at the end of the molecule in Y.
Hydrophilic groups (-COOII, -C
OOCHa, -0ff, -0C1+3, -C
N, -CONII2NHCOCI+3, -N)h
, -NMe2, etc.).
例えば、具体的には、 分子膜を形成する化合物 等を挙げることができる。For example, specifically, Compounds that form molecular membranes etc. can be mentioned.
本発明の分子の中央に剛直性をもつコアを有し、しかも
水面」二に展開して単分子■９を形成する化合物を主成
分として含むＬ Ｂ膜を配向膜として用いた液晶素子は
、ラビング処理を施さなくても液晶が配向するという性
質を示しており、しかも、従来のＬ Ｂ膜の場合と比較
すると配向性が大幅に改善され、配向ムラが著しく減少
した良好な表示品位を示すことが出来る。A liquid crystal element using the LB film of the present invention as an alignment film, which contains as a main component a compound that has a rigid core at the center of the molecule and that expands on the water surface to form a single molecule 9, is as follows: It exhibits the property that the liquid crystal can be aligned without any rubbing treatment, and moreover, compared to the case of conventional LB films, the alignment has been greatly improved, and alignment unevenness has been significantly reduced, resulting in good display quality. I can do it.
以下、具体例を用いて本発明をより詳細に説明する。Hereinafter, the present invention will be explained in more detail using specific examples.
実施例１
６０ｍｍＸ５Ｑｍｍのガラス板の片側にパターンを形成
したマスクを用いてＩＴ○を２００ｎｍの厚さに、真空
蒸着した。次いで、１′ＦＯ電極」二に絶縁層として、
シリコン酸化物の股を真空蒸着法を用いて１００ｎｒｎ
の厚さに形成した。Example 1 IT○ was vacuum-deposited to a thickness of 200 nm using a mask with a pattern formed on one side of a 60 mm x 5 Q mm glass plate. Then, 1′FO electrode” and 2nd as an insulating layer.
The silicon oxide crotch is 100nrn using vacuum evaporation method.
It was formed to a thickness of .
ピラジン環を含み、しかも水面にに展開して単する）を
用いて前記ド１゛０を蒸着したガラス板上に１．Ｙ３膜
を前記した方法により、５層累積した。1. on a glass plate on which the above-mentioned do 1'0 was vapor-deposited using a pyrazine ring containing a pyrazine ring, which spreads on the water surface. Five layers of the Y3 film were stacked by the method described above.
同一処理のガラス基板を２枚用意し、第４図に示すよう
にＬ Ｂ膜形成時の引き上げ方向が直角になるようにセ
ルを構成し、１枚のガラス板上に直径７μｍのガラス繊
維を分散した酸無水物硬化型エポキシ樹脂を１辺のみ辺
の中央部に５龍幅を残して他の全周に１龍幅で印刷した
」二で、第１図に示すように電極面に対向させた状態で
加圧し、１５０”Ｃで１時間加熱して硬化接着した。接
着後、減圧下で前記開口部から液晶（メルク社製 商品
名ＺＬＩ３２２５）を注入した。注入後、開口部を市販
の酸無水物硬化型エポキシ樹脂で固着し、液晶を封＋Ｌ
していわゆるツィスティッドネマチック（ＴＮ）型液晶
セルを完成した。完成したＴＮ型液晶セルは配向ムラの
無い良好な配向状態を示した。Two glass substrates of the same treatment were prepared, a cell was constructed so that the pulling direction during the formation of the LB film was at right angles as shown in Fig. 4, and glass fibers with a diameter of 7 μm were placed on one glass plate. The dispersed acid anhydride-curing epoxy resin was printed with a width of 5 widths in the center of one side, and a width of 1 width around the other edges, facing the electrode surface as shown in Figure 1. Pressure was applied in this state, and the adhesive was cured by heating at 150"C for 1 hour. After adhesion, liquid crystal (manufactured by Merck & Co., trade name: ZLI3225) was injected through the opening under reduced pressure. After injection, the opening was commercially available. Fix with acid anhydride-curing epoxy resin and seal the liquid crystal +L
They completed a so-called twisted nematic (TN) type liquid crystal cell. The completed TN type liquid crystal cell showed a good alignment state with no alignment unevenness.
第１図は本発明の液晶素子の概略を示す図、第２図はＬ
Ｂ法の概略を示す図、第３図はり、 Ｂ法に′よって基
板に累積した膜を示す図、第４図は本発明によ、って得
られたＴＮ型液晶セルを示す図である。
１１・・・・・・基板、１２・・・・・・透明電極層、
１３・・・・・・絶縁膜、１４・・・・・・配向制御膜
、１５・・・・・・スペーサ、１６・・・・・・液晶層
、２１・・・・・・ガラス基板、２２・・・・・・移し
取った単分子膜、２３・・・・・・引き上げ方向、２４
・・・・・・水面上に展開した単分子膜、２５・・・・
・・水、３１・・・・・・未累積部、３２・・・・・・
累積部、３３・・・・・・引き上げ方向、４１・・・・
・・上基板、４２・・・・・・下基板、４３・・・・・
・上基板の引き上げ方向。
第１図
１１・・・・養成
１２・・・・・込−明雪居１
１３・・・・・紀練灰
１４・・・・・配ｆ６Ｊ〜１柳脱
１５・・・・・Ｘヤーブー
１６・・・・・歳−晶層
第２図
２４・・・・７１４１上１こ眉ｄ噌しＬ岸ノド１Ｈ更２
５・・・・Ａ（
第３図
３１・・・・・未累積壱ｐ
３２・・・・・粟項枦
３３・・・・・引きＩｔブ力向FIG. 1 is a diagram schematically showing the liquid crystal element of the present invention, and FIG.
Figure 3 is a diagram showing an outline of method B; Figure 3 is a diagram showing a film accumulated on a substrate by method B; Figure 4 is a diagram showing a TN type liquid crystal cell obtained according to the present invention. . 11...Substrate, 12...Transparent electrode layer,
13... Insulating film, 14... Orientation control film, 15... Spacer, 16... Liquid crystal layer, 21... Glass substrate, 22... Transferred monomolecular film, 23... Pulling direction, 24
... Monomolecular film spread on the water surface, 25...
...Wednesday, 31...Unaccumulated part, 32...
Accumulation part, 33... Pulling direction, 41...
...Top board, 42...Bottom board, 43...
- Direction of pulling up the upper board. Figure 1 11...Training 12...Includes - Meisetsuju 1 13...Drilling ash 14...Distribution f6J~1 Yanagi escape 15...X Yabu 16 years old - Crystal layer 2 Figure 24... 7141 upper 1 eyebrow d, L shore throat 1H further 2
5... A ( Fig. 3 31... unaccumulated 1p 32... millet head 33... pull it bu force direction
Claims (1)
直性をもつコアを有し、しかも水面上に展開して単分子
膜を形成する性質を有する化合物を主成分とする単分子
層を１層以上積層してなる配向制御膜を有する液晶素子
。On a substrate on which at least an electrode layer is formed, a monomolecular layer mainly composed of a compound having a rigid core at the center of the molecule and having the property of forming a monomolecular film by spreading on the water surface is formed. A liquid crystal element having an alignment control film formed by laminating more than one layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25338988A JPH0299925A (en) | 1988-10-06 | 1988-10-06 | Liquid crystal element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25338988A JPH0299925A (en) | 1988-10-06 | 1988-10-06 | Liquid crystal element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0299925A true JPH0299925A (en) | 1990-04-11 |
Family
ID=17250689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25338988A Pending JPH0299925A (en) | 1988-10-06 | 1988-10-06 | Liquid crystal element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0299925A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5535030A (en) * | 1992-11-30 | 1996-07-09 | Sharp Kabushiki Kaisha | LCD having an overcoat film only over a display portion and either an electrode terminal or a seal portion |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62291621A (en) * | 1986-06-11 | 1987-12-18 | Canon Inc | Liquid crystal element |
| JPS6323131A (en) * | 1986-03-10 | 1988-01-30 | Kanegafuchi Chem Ind Co Ltd | Thin polyimide film for orienting liquid crystal |
| JPH01108525A (en) * | 1987-10-22 | 1989-04-25 | Seiko Instr & Electron Ltd | Production of organic molecular oriented film |
-
1988
- 1988-10-06 JP JP25338988A patent/JPH0299925A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6323131A (en) * | 1986-03-10 | 1988-01-30 | Kanegafuchi Chem Ind Co Ltd | Thin polyimide film for orienting liquid crystal |
| JPS62291621A (en) * | 1986-06-11 | 1987-12-18 | Canon Inc | Liquid crystal element |
| JPH01108525A (en) * | 1987-10-22 | 1989-04-25 | Seiko Instr & Electron Ltd | Production of organic molecular oriented film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5535030A (en) * | 1992-11-30 | 1996-07-09 | Sharp Kabushiki Kaisha | LCD having an overcoat film only over a display portion and either an electrode terminal or a seal portion |
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