JPH0210325A - Liquid crystal oriented film - Google Patents
Liquid crystal oriented filmInfo
- Publication number
- JPH0210325A JPH0210325A JP15933988A JP15933988A JPH0210325A JP H0210325 A JPH0210325 A JP H0210325A JP 15933988 A JP15933988 A JP 15933988A JP 15933988 A JP15933988 A JP 15933988A JP H0210325 A JPH0210325 A JP H0210325A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- alignment film
- transparent electrode
- display element
- crystal oriented
- 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 38
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 abstract description 11
- 230000007547 defect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 6
- 229920001721 polyimide Polymers 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 3
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- 239000004988 Nematic liquid crystal Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 210000002858 crystal cell Anatomy 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 1
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004990 Smectic liquid crystal Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 125000004386 diacrylate group Chemical group 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005621 ferroelectricity Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- QIWKUEJZZCOPFV-UHFFFAOYSA-N phenyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1=CC=CC=C1 QIWKUEJZZCOPFV-UHFFFAOYSA-N 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の分野］
本発明は、液晶表示素子に設けられる液晶配向膜に関す
る。さらに詳しくは、強誘電性液晶素子に用いるのに適
した液晶配向膜に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a liquid crystal alignment film provided in a liquid crystal display element. More specifically, the present invention relates to a liquid crystal alignment film suitable for use in ferroelectric liquid crystal devices.
［発明の技術的背景および従来技術］
従来より、時計、コンピューター、ワープロなどに使用
されている液晶表示素子はネマチック液晶をねじれ構造
にしたツィスディドネマチック（ＴＮ）モードによる表
示が主流である。ところが、このＴＮ型液晶表示素子は
応答速度が遅く、現状では２０ミリ秒が限度であるとい
う欠点を有しており、高速応答性が要求されるテレビシ
ミ１ンパネルなどに利用する際の大きな問題となってい
る。[Technical Background of the Invention and Prior Art] Conventionally, liquid crystal display elements used in watches, computers, word processors, etc. have mainly displayed in a twisted nematic (TN) mode in which nematic liquid crystal has a twisted structure. However, this TN type liquid crystal display element has a slow response speed, currently limited to 20 milliseconds, which is a major problem when used in TV panels that require high-speed response. It becomes.
これに対して、最近、高速応答性のある強誘電性液晶が
新しいデイスプレーの分野を拓くものとして期待され、
研究されている。この強誘電性液晶材料を使用した表示
素ｒでは、液晶分子を基板面に゛ト行なある優先方位に
そろえて配列させることがＩＲ要である。In contrast, recently, ferroelectric liquid crystals with high-speed response are expected to open up a new field of displays.
being researched. In a display element using this ferroelectric liquid crystal material, IR is required to align the liquid crystal molecules in a certain preferred direction on the substrate surface.
公知の強誘電性液晶配向方法は、強磁場の印加やすり応
力の利用によるものがあるが、これらの方法は生産プロ
セスに実用的とはいえない。また、スペーサエツジから
の配向が提案されている（ｒ自然Ｊ １９８３年７月号
第３６頁〜第４６頁、「オブトロニクス（０ＰＴＲＯＮ
ＩＣＳ）１１９８３年９月号第６４頁〜第７０頁参照）
が、これも−様な配向を達成できる領域がエツジから１
００μｍまでと狭く、実用化の面ではまだ不充分である
。Some known methods for aligning ferroelectric liquid crystals utilize file stress applied with a strong magnetic field, but these methods are not practical for production processes. Orientation from spacer edges has also been proposed (r Nature J, July 1983 issue, pp. 36-46, “OPTRON
ICS) September 11983 issue, pages 64 to 70)
However, the region where -like orientation can be achieved is 1 from the edge.
00 μm, which is still insufficient for practical use.
他方、従来のネマチック液晶やコレステリック液晶の配
向制御に用いられている酸化ケイ素（Ｓｉｎ）を斜方蒸
着する方法（特公昭５４−１２０６７号）や、ポリイミ
ド等の塗布後、特定の布等でラビングする方法（特開昭
６１−１８６９３２号）で設けられる配向膜では、強誘
電性液晶の場合十分−様な配向が得られない。また、ポ
リイミド系樹脂を真空中で蒸着１ｆ７−合したり（特開
昭６１−１３８９２４号）、グロー放電により形成した
（特開昭６１−２１９０２９号）ポリイミド膜を配向膜
として使用する方法でも、必ずしも十分に配向せずコン
トラストの低下が問題となる。On the other hand, there is a method of obliquely depositing silicon oxide (Sin) (Japanese Patent Publication No. 54-12067), which is used to control the alignment of conventional nematic liquid crystals and cholesteric liquid crystals, and a method of rubbing with a specific cloth after applying polyimide, etc. In the case of a ferroelectric liquid crystal, the alignment film provided by the method (Japanese Patent Application Laid-open No. 186932/1983) cannot provide sufficient alignment. Alternatively, a method in which a polyimide film formed by vapor-depositing a polyimide resin in a vacuum (Japanese Unexamined Patent Publication No. 61-138924) or using a polyimide film formed by glow discharge (Japanese Unexamined Patent Application No. 61-219029) is used as an alignment film. The orientation is not necessarily sufficient and a decrease in contrast becomes a problem.
［発明の要旨］
本発明の目的は、強誘電性液晶を十分良好に配向させる
ことのできる液晶配向膜を提供することにある。[Summary of the Invention] An object of the present invention is to provide a liquid crystal alignment film that can align ferroelectric liquid crystals sufficiently well.
−Ｆ記の目的は、本発明の、二枚の透明電極基板の間に
液晶を封入してなる液晶表示素子に設けられる液晶配向
膜であって、下記−一般式（１）で表される繰り返し単
位を少なくとも８０モル％以上有する樹脂からなること
を特徴とする液晶配向膜により達成することができる。- The object of item F is a liquid crystal alignment film provided in a liquid crystal display element of the present invention, which is formed by sealing a liquid crystal between two transparent electrode substrates, and is represented by the following - general formula (1). This can be achieved by a liquid crystal alignment film characterized by being made of a resin having at least 80 mol% or more of repeating units.
一般式（１）：
％式％）
（ただし、Ｒ：ＨまたはＣＨ３
ｍ：２≦ｍ≦１２の整数
である。）
本発明の液晶配向膜は従来から行なわれている塗布法に
よって形成することができるので、生産プロセスの上か
らも特殊な工程を新たに増設する必要がない。さらに、
本発明の液晶配向ＩＥＱは、比較的簡単に広範囲にわた
った付設が可能であるので、実用的なものであるといえ
る。General formula (1): % formula %) (However, R: H or CH3 m: An integer of 2≦m≦12.) The liquid crystal alignment film of the present invention can be formed by a conventional coating method. This eliminates the need to add new special processes to the production process. moreover,
The liquid crystal alignment IEQ of the present invention can be installed over a wide range with relative ease, so it can be said to be practical.
［発明の構成］
本発明の液晶配向膜は、下記−一般式（１）で表される
繰り返し単位を、その成分中に少なくとも８０モル％以
上有している。[Structure of the Invention] The liquid crystal alignment film of the present invention has at least 80 mol% or more of repeating units represented by the following general formula (1) in its components.
一般式（１）：
％式％）
（ただし、Ｒ二ＨまたはＣＨ３
ｍ：２≦ｍ≦１２の整数
である。）
一般式（１）の繰り返し単位を有する高分子樹脂は、ポ
リヒドロキシアルキル（メタ）アクリレートといわれる
が、本発明の液晶配向膜は、このヒドロキシアルキル（
メタ）アクリレートのホモポリマーでも、あるいは、こ
のヒドロキシアルキル（メタ）アクリレートを８０モル
％以上含むコポリマーであってもよい。コポリマーの場
合、残る２０モル％はこのヒドロキシアルキル（メタ）
アクリレートと共重合する樹脂であれば特に限定されな
い。メチルメタクリレート、フェニルメタクリレート、
ポリエチレングリコールジアクリレート、ジペンタエリ
スリトールポリアクリレート、ウレタンアクリレート、
エポキシアクリレート等のメタクリレート、アクリレー
ト樹脂あるいは、スチレン、ジビニルベンゼン、ジアク
リルフタレート、塩化ビニル、酢酸ビニル等のビニル樹
脂等が適宜使用される。また、上記共重合体に必要に応
じて、樹脂の架橋を目的として、アルコキシシラン、ア
ルコキシチタン等のカップリング剤を添加してなる樹脂
でもよい。General formula (1): % formula %) (However, R2H or CH3 m: is an integer of 2≦m≦12.) The polymer resin having the repeating unit of general formula (1) is polyhydroxyalkyl ( Although it is called meth)acrylate, the liquid crystal alignment film of the present invention is made of hydroxyalkyl(meth)acrylate.
It may be a homopolymer of meth)acrylate or a copolymer containing 80 mol% or more of this hydroxyalkyl(meth)acrylate. In the case of copolymers, the remaining 20 mol% is this hydroxyalkyl (meth)
There are no particular limitations on the resin as long as it copolymerizes with acrylate. Methyl methacrylate, phenyl methacrylate,
Polyethylene glycol diacrylate, dipentaerythritol polyacrylate, urethane acrylate,
Methacrylates such as epoxy acrylate, acrylate resins, vinyl resins such as styrene, divinylbenzene, diacryl phthalate, vinyl chloride, vinyl acetate, etc. are used as appropriate. Further, a resin obtained by adding a coupling agent such as alkoxysilane or alkoxytitanium to the above-mentioned copolymer for the purpose of crosslinking the resin may be used, if necessary.
配向膜は従来公知の方法、例えば塗布法によって設置す
ることができる。配向膜は透明電極トに直接設けてもよ
いし、透明電極の上に電気絶縁層など他の機能を有する
ＩＩ！２を設け、この層上に設けてもよい。また、使用
目的に応じて、偏光板、カラーフィルターなど、従来の
液晶表示素子に設けられる機能を設けることができる。The alignment film can be installed by a conventionally known method, for example, a coating method. The alignment film may be provided directly on the transparent electrode, or it may have other functions such as an electrically insulating layer on the transparent electrode. 2 may be provided on this layer. Further, depending on the purpose of use, functions provided in conventional liquid crystal display elements, such as polarizing plates and color filters, can be provided.
また、配向膜の１漠Ｊ’メは２００人〜２０００人が好
ましい。Further, it is preferable that the number of people in the alignment film is 200 to 2,000.
このようにして設けられた配向膜はナイロン、ポリエス
テル、ポリアクリロニトリロのような合成繊維、綿、羊
毛のような天然繊維でラビング処理されることが好まし
い。The alignment film thus provided is preferably rubbed with synthetic fibers such as nylon, polyester, and polyacrylonitrile, and natural fibers such as cotton and wool.
強誘電性液晶は本発明の液晶配向膜によって、良好な配
向を得ることができる。Ferroelectric liquid crystals can be well aligned by using the liquid crystal alignment film of the present invention.
強誘電性を有する液晶は、具体的にはカイラルスメクテ
ィクＣ相（ＳｍＣ” ） 、Ｈ相（ＳｍＨ”）、■相（
Ｓｍｌ” ）、Ｊ相（ＳｍＪ” ）、に相（Ｓｍに”）
、Ｇ相（ＳｍＧ” ）またはＦ相（ＳｍＦ” ）を有す
液晶である。具体的な液晶組成物としては、チッソ■製
のＣ５−１０１１，Ｃ５−１０１３、Ｃ５−１０１５、
メルク社製のＺＬｌ−３４８８、ＺＬＩ−３４８９、帝
国化学産業■製のＨ５−９ＢＰ、Ｈ３−７ＢＰ （いず
れも商品名）などを挙げることができるが、これに限定
されるものではない。これらの液晶の中には液晶に溶解
する二色性染料、減粘剤等を添加しても何ら支障はない
。Specifically, liquid crystals having ferroelectricity include chiral smectic C phase (SmC"), H phase (SmH"), and ■ phase (
Sml”), J phase (SmJ”), ni phase (Sm ni”)
, G phase (SmG'') or F phase (SmF''). Specific liquid crystal compositions include C5-1011, C5-1013, C5-1015, manufactured by Chisso ■.
Examples include ZLl-3488 and ZLI-3489 manufactured by Merck, and H5-9BP and H3-7BP (both trade names) manufactured by Teikoku Kagaku Sangyo, but are not limited thereto. There is no problem in adding dichroic dyes, viscosity reducers, etc. which are soluble in the liquid crystal to these liquid crystals.
又、本発明の液晶配向膜を用いた液晶表示素子において
は、液晶層の層Ｊゾを確保するために、両透明電極基板
間にはスペーサーが分散介在されることが好ましい。Further, in the liquid crystal display device using the liquid crystal alignment film of the present invention, it is preferable that spacers are dispersed between both transparent electrode substrates in order to ensure the layer J of the liquid crystal layer.
次に本発明の実りｂ例を記載する。ただし、本発明はこ
れに限定されるものではない。Next, a fruitful example b of the present invention will be described. However, the present invention is not limited to this.
［実施例１］
ガラス板基板（厚さ１．１ｍｍ）上に、インジウム−ス
ズ酸化物（Ｉ Ｔｏ）の透明電極の層を設け、この層の
表面にポリ２−とドロキシエチルメタクリレートをスピ
ナーで塗布し、１５０℃で１時間熱処理して膜厚０．１
μｍの膜を形成した。[Example 1] A transparent electrode layer of indium-tin oxide (ITo) was provided on a glass plate substrate (thickness 1.1 mm), and poly2- and droxyethyl methacrylate were applied to the surface of this layer using a spinner. The film was coated with
A μm film was formed.
次に、１反をポリエステルのノａで三回うビンク処理し
て配向膜とした。こうして得た二枚の透明電極基板をラ
ビング方向が平行になるようにして、スペーサーをはさ
んで貼合わせ、セル間隙２μｍの液晶用セルを作成した
。このセルに強誘電性液晶であるメルク社製ＺＬＩ−３
７７５を注入し、いったん１００℃まで加熱し、その後
４０℃になるまで徐冷した。Next, one roll was treated with polyester atomizer three times to form an alignment film. The two thus obtained transparent electrode substrates were pasted together with a spacer in between, with the rubbing directions parallel to each other, to create a liquid crystal cell with a cell gap of 2 μm. This cell uses ZLI-3 manufactured by Merck, which is a ferroelectric liquid crystal.
775 was injected, heated once to 100°C, and then slowly cooled to 40°C.
このようにして得た強誘電性液晶セルを直交ニコル下で
観察したところ、欠陥のない−様な配向がみられ、また
双安定性も優れていた。When the ferroelectric liquid crystal cell thus obtained was observed under crossed nicol conditions, it was found to have a -like orientation with no defects and excellent bistability.
この実施例１から明らかに、本発明の液晶配向膜は、強
誘電性液晶を十分良好に配向させることのできるもので
あることが解る。It is clear from this Example 1 that the liquid crystal alignment film of the present invention can align ferroelectric liquid crystal sufficiently well.
特許出願人 富士写真フィルム株式会社代 理 人 弁
理士 柳川 秦男Patent applicant Fuji Photo Film Co., Ltd. Representative Patent attorney Hatao Yanagawa
Claims (1)
表示素子に設けられる液晶配向膜であって、下記一般式
（１）で表される繰り返し単位を少なくとも８０モル％
以上有する樹脂からなることを特徴とする液晶配向膜。 一般式（１）： ▲数式、化学式、表等があります▼ （ただし、Ｒ：ＨまたはＣＨ＿３ ｍ：２≦ｍ≦１２の整数 である。）[Claims] 1. A liquid crystal alignment film provided in a liquid crystal display element formed by sealing a liquid crystal between two transparent electrode substrates, which contains at least 80 mol% of repeating units represented by the following general formula (1).
A liquid crystal alignment film comprising a resin having the above properties. General formula (1): ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (However, R: H or CH_3 m: An integer of 2≦m≦12.)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15933988A JPH0210325A (en) | 1988-06-29 | 1988-06-29 | Liquid crystal oriented film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15933988A JPH0210325A (en) | 1988-06-29 | 1988-06-29 | Liquid crystal oriented film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0210325A true JPH0210325A (en) | 1990-01-16 |
Family
ID=15691674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15933988A Pending JPH0210325A (en) | 1988-06-29 | 1988-06-29 | Liquid crystal oriented film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210325A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5255109A (en) * | 1992-04-23 | 1993-10-19 | Pc Tech Inc. | Heat dissipating LCD display |
-
1988
- 1988-06-29 JP JP15933988A patent/JPH0210325A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5255109A (en) * | 1992-04-23 | 1993-10-19 | Pc Tech Inc. | Heat dissipating LCD display |
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