JPH06110044A - Liquid crystal composition and liquid crystal element - Google Patents
Liquid crystal composition and liquid crystal elementInfo
- Publication number
- JPH06110044A JPH06110044A JP4298833A JP29883392A JPH06110044A JP H06110044 A JPH06110044 A JP H06110044A JP 4298833 A JP4298833 A JP 4298833A JP 29883392 A JP29883392 A JP 29883392A JP H06110044 A JPH06110044 A JP H06110044A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal composition
- smectic
- phase
- electroclinic
- 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 57
- 239000000203 mixture Substances 0.000 title claims description 39
- 239000004990 Smectic liquid crystal Substances 0.000 claims abstract description 23
- 239000005264 High molar mass liquid crystal Substances 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims description 11
- 230000001747 exhibiting effect Effects 0.000 claims description 8
- 150000003384 small molecules Chemical class 0.000 claims description 6
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011521 glass Substances 0.000 abstract description 5
- 230000007704 transition Effects 0.000 abstract description 3
- 230000005684 electric field Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- -1 polysiloxane Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000005266 side chain polymer Substances 0.000 description 2
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- VAUOAQLPQOCFMX-UHFFFAOYSA-N [4-(4-heptoxyphenyl)phenyl] 2-chloro-3-methylbutanoate Chemical group C1=CC(OCCCCCCC)=CC=C1C1=CC=C(OC(=O)C(Cl)C(C)C)C=C1 VAUOAQLPQOCFMX-UHFFFAOYSA-N 0.000 description 1
- 229940114081 cinnamate Drugs 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/02—Liquid crystal materials characterised by optical, electrical or physical properties of the components, in general
- C09K19/0233—Electroclinic
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Substances (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、改良されたエレクトロ
クリニック効果を示す液晶組成物、及びそのような液晶
組成物を用いた、高速応答性を示す液晶素子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal composition exhibiting an improved electroclinic effect, and a liquid crystal device using such a liquid crystal composition exhibiting a fast response.
【０００２】[0002]
【従来の技術】液晶素子は、腕時計、電卓、パ−ソナル
コンピュ−タ−用ディスプレイ、ワ−ドプロセッサ−用
ディスプレイ等の電子光学装置に広く利用されている。
しかし、そのような電子光学装置に多用されているネマ
チック液晶を用いた液晶素子は、応答速度が１〜１０ミ
リ秒と遅く、高速スイッチング素子への適用が困難であ
るという問題がある。Liquid crystal elements are widely used in electro-optical devices such as wristwatches, calculators, personal computer displays and word processor displays.
However, a liquid crystal element using a nematic liquid crystal, which is widely used in such an electro-optical device, has a slow response speed of 1 to 10 milliseconds, which makes it difficult to apply it to a high-speed switching element.
【０００３】これに対し、スメクチック液晶の一種であ
る強誘電性液晶を用いた液晶素子は、１０マイクロ秒の
オ−ダ−という高速の応答速度を示すため、大容量表示
や高速スイッチングが可能であり、その実用化が期待さ
れている。On the other hand, a liquid crystal element using a ferroelectric liquid crystal, which is a kind of smectic liquid crystal, exhibits a high response speed of the order of 10 microseconds, so that large capacity display and high speed switching are possible. There are expectations for its practical application.
【０００４】一方、近年、スメクチック液晶の一種にエ
レクトロクリニック効果という現象が見出だされてい
る。このエレクトロクリニック効果に基づくエレクトロ
クリニックスイッチングは、電界の印加に対してリニア
に応答し、またスイッチング時間は１マイクロ秒と極め
て早い。On the other hand, in recent years, a phenomenon called electroclinic effect has been found in a kind of smectic liquid crystal. Electroclinic switching based on this electroclinic effect responds linearly to the application of an electric field, and the switching time is extremely fast at 1 microsecond.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、広い
温度域にわたってエレクトロクリニックスイッチングを
示す液晶組成物を提供することにある。本発明の他の目
的は、広い温度域にわたってエレクトロクリニックスイ
ッチングを示す液晶組成物を用いた液晶素子を提供する
ことにある。An object of the present invention is to provide a liquid crystal composition which exhibits electroclinic switching over a wide temperature range. Another object of the present invention is to provide a liquid crystal device using a liquid crystal composition that exhibits electroclinic switching over a wide temperature range.
【０００６】[0006]
【課題を解決するための手段】本発明は、低分子量化合
物を含みエレクトロクリニックスイッチング特性を示す
エレクトロクリニック液晶組成物と、スメクチックＡ相
を有するポリマ−液晶化合物とを含有する液晶組成物を
提供する。The present invention provides a liquid crystal composition containing an electroclinic liquid crystal composition containing a low molecular weight compound and exhibiting electroclinic switching characteristics, and a polymer liquid crystal compound having a smectic A phase. .
【０００７】また、本発明は、一対の電極基板及びその
間に介在する液晶組成物とを具備し、前記液晶組成物
は、低分子量化合物を含みエレクトロクリニックスイッ
チング特性を示すエレクトロクリニック液晶組成物と、
スメクチックＡ相を有するポリマ−液晶化合物とを含有
することを特徴とする液晶素子を提供する。Further, the present invention comprises a pair of electrode substrates and a liquid crystal composition interposed therebetween, the liquid crystal composition comprising an electroclinic liquid crystal composition containing a low molecular weight compound and exhibiting electroclinic switching characteristics,
Provided is a liquid crystal element containing a polymer liquid crystal compound having a smectic A phase.
【０００８】本明細書において、エレクトロクリニック
液晶とは、エレクトロクリニック効果を示す液晶のこと
を言う。また、本明細書において、換算温度とは、ＳC
*→ＳA 相転位温度からの隔り、即ちＴ−Ｔ（ＳC *→Ｓ
A ）を意味する。本発明に使用されるエレクトロクリニ
ック液晶組成物は、強誘電性液晶組成物であることが望
ましい。In the present specification, the electroclinic liquid crystal means a liquid crystal exhibiting an electroclinic effect. Further, in the present specification, the converted temperature is S C
* → S A separation from the phase transition temperature, that is, TT (S C * → S
A ) means. The electroclinic liquid crystal composition used in the present invention is preferably a ferroelectric liquid crystal composition.
【０００９】エレクトロクリニック液晶組成物に使用さ
れる低分子量化合物としては、例えば、４−（３−メチ
ル−２−クロロブタノイルオキシ）−４´−ヘプチルオ
キシビフェニル、及びｐ−デシルオキシベンジリデン−
ｐ´−アミノ−１−メチルプロピルシンナメ−ト等を挙
げることが出来る。Examples of the low molecular weight compound used in the electroclinic liquid crystal composition include 4- (3-methyl-2-chlorobutanoyloxy) -4'-heptyloxybiphenyl and p-decyloxybenzylidene-
Examples thereof include p'-amino-1-methylpropyl cinnamate and the like.
【００１０】本発明に使用されるスメクチックＡ相を有
するポリマ−液晶化合物としては、例えば、１種又はそ
れ以上のメソ型側基を有するフレキシブル又はセミフレ
キシブルの主鎖を有する物質；ポリシロキサン主鎖、ポ
リアクリレ−ト主鎖及びポリメタクリレ−ト主鎖を有す
る側鎖ポリマ−等を挙げることが出来る。ポリマ−液晶
化合物の分子量は、１，０００ないし１００，０００で
あるのが好ましい。スメクチックＡ相を有するポリマ−
液晶化合物の配合量は、液晶組成物に対し、１ないし２
０重量％、好ましくは１ないし１０重量％である。Examples of the polymer-liquid crystal compound having a smectic A phase used in the present invention include substances having a flexible or semi-flexible main chain having one or more meso-type side groups; polysiloxane main chain , A side chain polymer having a polyacrylate main chain and a polymethacrylate main chain, and the like. The molecular weight of the polymer liquid crystal compound is preferably 1,000 to 100,000. Polymer having smectic A phase
The compounding amount of the liquid crystal compound is 1 to 2 with respect to the liquid crystal composition.
It is 0% by weight, preferably 1 to 10% by weight.
【００１１】[0011]
【作用】本発明の液晶組成物は、低分子量化合物を含み
エレクトロクリニックスイッチング特性を示すエレクト
ロクリニック液晶組成物と、スメクチックＡ相を有する
ポリマ−液晶化合物とを含有している。そのため、従来
の低分子量のエレクトロクリニック液晶組成物のみを用
いた場合に比べ、広範な温度範囲で高い傾斜角が得られ
る。また、広範な温度範囲でエレクトロクリニック効果
が得られる。更に、スメクチックＡ相からスメクチック
Ｃ相への転位温度は、かなり低くなる。The liquid crystal composition of the present invention contains an electroclinic liquid crystal composition containing a low molecular weight compound and exhibiting electroclinic switching characteristics, and a polymer liquid crystal compound having a smectic A phase. Therefore, a high tilt angle can be obtained in a wide temperature range as compared with the case where only the conventional low molecular weight electroclinic liquid crystal composition is used. Further, the electroclinic effect can be obtained in a wide temperature range. Furthermore, the dislocation temperature from the smectic A phase to the smectic C phase is considerably lower.
【００１２】[0012]
【実施例】以下に本発明の実施例を示すが、これは単に
例示するのみであって、本発明は何らこれに限定される
ものではない。EXAMPLES Examples of the present invention will be shown below, but these are merely examples, and the present invention is not limited thereto.
【００１３】エレクトロクリニック液晶組成物として、
ＳＣＥ１３（低分子量強誘電性液晶組成物、商標：ＢＤ
Ｈ社製）を用い、スメクチックＡ相を有するポリマ−液
晶化合物として、ＤＣ５０６（ポリシロキサン主鎖を有
する側鎖ポリマ−のコ−ド番号、ダウコ−ニング社製）
を用いた。As an electroclinic liquid crystal composition,
SCE13 (Low molecular weight ferroelectric liquid crystal composition, trademark: BD
Manufactured by Dow Corning Co., Ltd., as a polymer liquid crystal compound having a smectic A phase, using DC No. 506 (code number of a side chain polymer having a polysiloxane main chain).
Was used.
【００１４】図１は、本発明の液晶組成物を用いた液晶
装置を示す。２３０mm×１８５mm、厚さ１．１mmの透明
ガラス基板１，２の表面に、ＩＴＯからなる厚さ１００
０オングストロ−ムの透明電極３，４が形成され、それ
らの上に厚さ５００オングストロ−ムのポリイミドから
なる配向層５，６が形成されている。これらの透明ガラ
ス基板１，２は、２μｍの間隔に配向層５，６がスペ−
サ−７を介して向き合うように対向配置されており、そ
の間に液晶組成物８が充填され、シ−ル部材９によりシ
−ルされている。また、透明ガラス基板１，２のそれぞ
れの外側の面に偏向板１０，１１が取り付けられてい
る。FIG. 1 shows a liquid crystal device using the liquid crystal composition of the present invention. On the surface of the transparent glass substrates 1 and 2 having a size of 230 mm × 185 mm and a thickness of 1.1 mm, a thickness of 100 made of ITO
Transparent electrodes 3 and 4 of 0 angstrom are formed, and alignment layers 5 and 6 made of polyimide having a thickness of 500 angstrom are formed on them. On these transparent glass substrates 1 and 2, the alignment layers 5 and 6 are spaced at intervals of 2 μm.
The liquid crystal composition 8 is filled between them so as to be opposed to each other via a server 7, and is sealed by a seal member 9. Deflection plates 10 and 11 are attached to the outer surfaces of the transparent glass substrates 1 and 2, respectively.
【００１５】このようにして構成されている液晶素子に
おいて、液晶組成物８としてＳＣＥ１３のみを用い、透
明電極３，４に±２０Ｖの方形波を印加したところ、５
℃の換算温度において、電場印加によるチルト角は３°
であり、１５℃の換算温度において、電場印加によるチ
ルト角は１．１°であった。In the liquid crystal device thus constructed, only SCE13 was used as the liquid crystal composition 8 and a square wave of ± 20 V was applied to the transparent electrodes 3 and 4 to obtain 5
At the converted temperature of ° C, the tilt angle due to the applied electric field is 3 °
The tilt angle due to application of an electric field was 1.1 ° at a conversion temperature of 15 ° C.
【００１６】次に、液晶組成物８として、９７．６重量
％のＳＣＥ１３と２．４重量％のＤＣ５０６との混合物
を用い、透明電極３，４に±２０Ｖの方形波を印加した
ところ、５℃の換算温度において、電場印加によるチル
ト角は４．５°であり、１５℃の換算温度において、電
場印加によるチルト角は２．１°であった。Next, as the liquid crystal composition 8, a mixture of 97.6% by weight of SCE13 and 2.4% by weight of DC506 was used, and a square wave of ± 20 V was applied to the transparent electrodes 3 and 4. At a conversion temperature of ° C, the tilt angle by applying an electric field was 4.5 °, and at a conversion temperature of 15 ° C, the tilt angle by applying an electric field was 2.1 °.
【００１７】また、ＳＣＥ１３のみからなる液晶組成物
の場合、スメクチックc ＡからスメクチックＣへの転位
は６０．５℃の温度で生じたが、９７．６重量％のＳＣ
Ｅ１３と２．４重量％のＤＣ５０６とからなる液晶組成
物の場合、スメクチックc ＡからスメクチックＣへの転
位は２７．６℃の温度で生じた。Further, in the case of a liquid crystal composition consisting of SCE13 only, the dislocation from smectic c A to smectic C occurred at a temperature of 60.5 ° C., but SC of 97.6% by weight was used.
In the case of a liquid crystal composition consisting of E13 and 2.4 wt% DC506, the smectic c A to smectic C rearrangement occurred at a temperature of 27.6 ° C.
【００１８】[0018]
【発明の効果】以上説明したように、本発明の液晶組成
物によると、従来の低分子量のエレクトロクリニック液
晶組成物のみを用いた場合に比べ、広範な温度範囲で高
い傾斜角が得られる。更に、スメクチックＡからスメク
チックＣへの転位温度は、かなり低くなる。As described above, according to the liquid crystal composition of the present invention, a high tilt angle can be obtained in a wide temperature range as compared with the case where only the conventional low molecular weight electroclinic liquid crystal composition is used. Furthermore, the transition temperature from smectic A to smectic C is considerably lower.
【図１】 本発明の一実施例に係る液晶素子の断面図。FIG. 1 is a cross-sectional view of a liquid crystal element according to an embodiment of the present invention.
１，２…ガラス基板、３，４…電極、５，６…配向層、
７…スペ−サ−、８…液晶組成物、９…シ−ル部材、１
０，１１…偏向板。1, 2 ... Glass substrate, 3, 4 ... Electrode, 5, 6 ... Alignment layer,
7 ... Spacer, 8 ... Liquid crystal composition, 9 ... Seal member, 1
0, 11 ... Deflection plate.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ゲイリー・アルキサンダー・レスター イギリス国、エイチユー16・４キューエ ヌ、ノース・ハンバーサイド、ハル、コッ テインハム、ライサム・ドライブ 22 (72)発明者 ポール・ギアン・ツリ イギリス国、エヌアール19・１アールデ ー、ノーフォーク、イースト・デレハム、 ヤックスハム、ヤックスハム・パーク（番 地なし) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Gary Alexander Lester UK HI, 16.4 K4, HQ, North Humberside, Hull, Cottingham, Rytham Drive 22 (72) Inventor Paul Gian・ Tsuri England, N19.1 Art Dee, Norfolk, East Dereham, Yaxham, Yaxham Park (no address)
Claims (5)
ックスイッチング特性を示すエレクトロクリニック液晶
組成物と、スメクチックＡ相を有するポリマ−液晶化合
物とを含有する液晶組成物。1. A liquid crystal composition comprising an electroclinic liquid crystal composition containing a low molecular weight compound and exhibiting electroclinic switching characteristics, and a polymer liquid crystal compound having a smectic A phase.
は、強誘電性液晶組成物である請求項１に記載の液晶組
成物。2. The liquid crystal composition according to claim 1, wherein the electroclinic liquid crystal composition is a ferroelectric liquid crystal composition.
液晶化合物を１ないし２０重量％含有する請求項１に記
載の液晶組成物。3. A polymer having the smectic A phase.
The liquid crystal composition according to claim 1, containing 1 to 20% by weight of the liquid crystal compound.
れ以上のメソ型側基を有するフレキシブル又はセミフレ
キシブルの主鎖を有する物質である請求項１に記載の液
晶組成物。4. The liquid crystal composition according to claim 1, wherein the polymer-liquid crystal compound is a substance having a flexible or semi-flexible main chain having one or more meso-type side groups.
晶組成物とを具備し、前記液晶組成物は、低分子量化合
物を含みエレクトロクリニックスイッチング特性を示す
エレクトロクリニック液晶組成物と、スメクチックＡ相
を有するポリマ−液晶化合物とを含有することを特徴と
する液晶素子。5. An electroclinic liquid crystal composition comprising a pair of electrode substrates and a liquid crystal composition interposed therebetween, the liquid crystal composition including a low molecular weight compound and exhibiting electroclinic switching characteristics, and a smectic A phase. And a polymer-liquid crystal compound thereof.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9212801A GB2268184B (en) | 1992-06-17 | 1992-06-17 | Liquid crystal composition and liquid crystal device |
| GB9212801:6 | 1992-06-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06110044A true JPH06110044A (en) | 1994-04-22 |
Family
ID=10717213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4298833A Pending JPH06110044A (en) | 1992-06-17 | 1992-11-09 | Liquid crystal composition and liquid crystal element |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH06110044A (en) |
| GB (1) | GB2268184B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000027508A (en) * | 1998-10-28 | 2000-05-15 | 김영환 | Display apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9012184D0 (en) * | 1990-05-31 | 1990-07-18 | Secr Defence | Electroclinic liquid crystal devices |
-
1992
- 1992-06-17 GB GB9212801A patent/GB2268184B/en not_active Expired - Lifetime
- 1992-11-09 JP JP4298833A patent/JPH06110044A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000027508A (en) * | 1998-10-28 | 2000-05-15 | 김영환 | Display apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2268184A (en) | 1994-01-05 |
| GB9212801D0 (en) | 1992-07-29 |
| GB2268184B (en) | 1995-11-29 |
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