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21. 发明授权

US5316694A Antiferroelectric liquid crystal composition 失效
标题翻译：反铁电液晶组合物
公开(公告)号：US5316694A
公开(公告)日：1994-05-31
申请号：US36882
申请日：1993-03-25
申请人： Katsuyuki Murashiro , Makoto Kikuchi , Shinichi Saito
发明人： Katsuyuki Murashiro , Makoto Kikuchi , Shinichi Saito
IPC分类号： C09K19/42 , C09K19/02 , C09K19/20 , C09K19/46 , G02F1/13 , C09K19/34 , C09K19/12 , C09K19/52
CPC分类号： C09K19/0266 , C09K19/2021 , C09K19/46
摘要： An antiferroelectric liquid crystal composition comprising a first component comprising at least one compound expressed by the formula (I) and exhibiting no antiferroelectric phase, and a second component comprising at least one compound expressed by the formula (II) and exhibiting an antiferroelectric phase, the contents of the first component and the second component being respectively 1 to 40% and 60 to 99%, based upon the total weight of the two components: ##STR1## wherein in the formula (I), R.sup.1 is 1-18C linear alkyl or alkoxy; R.sup.2 is 1-18C alkyl or alkoxy; k, l, m and n are 0 or 1; (k+l) and (m+n) are 1 or 2, (k+l)+(m+n) are 2 or 3; X is --OCH.sub.2 --, --CH.sub.2 O--, --COO--, --OCO-- or single bond; 6-membered rings A, B, C and D are 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, pyrazine-2,5-diyl or pyridazine-3,6-diyl, one of the side-positioned hydrogen atoms of which may be replaced by halogen atom or CN, andin the formula (II), R.sup.3 is 1-18C linear alkyl or alkoxy; R.sup.4 is 2-18C alkyl or alkoxy; p, q, t and u are 0 or 1; (p+q) and (t+u) each are 1 or 2; (p+q)+(t+u) are 2 or 3; j is 0 or 1; Z is --COO--, --OCO--, --OCH.sub.2 --, --CH.sub.2 O--or single bond; Y is --CH.sub.3 ; 6-membered rings E, F, G and H are 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, pyrazine-2,5-diyl or pyridazine-3,6-diyl; * shows asymmetric carbon atom.An antiferroelectric liquid crystal composition having the threshold voltage lowered at the time of transition from the antiferroelectric phase to ferroelectric phase accompanying the electric field impression in the antiferroelectric phase is provided, and a light-switching element which has a good contrast and can effect a tristable switching is obtained using the above composition.
摘要翻译：一种反铁电液晶组合物，其包含包含至少一种由式（I）表示的化合物并且不显示反铁电相的第一组分和包含至少一种由式（II）表示的化合物并显示出反铁电相的第二组分，基于两种组分的总重量，第一组分和第二组分的含量分别为1至40％和60至99％：其中在式（I）中， R1是1-18C直链烷基或烷氧基; R2为1-18C烷基或烷氧基; k，l，m和n分别为0或1; （k + 1）和（m + n）为1或2，（k + 1）+（m + n）为2或3; X是-OCH 2 - ， - CH 2 O - ， - COO - ， - OCO-或单键; 6元环A，B，C和D是1,4-亚苯基，吡啶-2,5-二基，嘧啶-2,5-二基，吡嗪-2,5-二基或哒嗪-3,6-二基，其中一个侧面定位的氢原子可以被卤素原子或CN代替，而在式（II）中，R 3是1-18个直链烷基或烷氧基; R4是2-18C烷基或烷氧基; p，q，t和u分别为0或1; （p + q）和（t + u）分别为1或2; （p + q）+（t + u）为2或3; j为0或1; Z是-COO - ， - OCO - ， - OCH 2 - ， - CH 2 O-或单键; Y为-CH 3; 6元环E，F，G和H是1,4-亚苯基，吡啶-2,5-二基，嘧啶-2,5-二基，吡嗪-2,5-二基或哒嗪-3,6-二基; *表示不对称碳原子。提供了一种反铁电液晶组合物，该反铁电液晶组合物在反铁电相中随着电场印模而从反铁电相转变为铁电相时具有降低的阈值电压，并且具有良好的对比度并且可以实现三重态的光开关元件使用上述组成获得切换。

22. 发明授权

US5294367A Ferroelectric liquid crystal composition and light switching element comprising the same 失效
标题翻译：铁电液晶组合物和包含其的光开关元件
公开(公告)号：US5294367A
公开(公告)日：1994-03-15
申请号：US881719
申请日：1992-05-12
申请人： Kanetsugu Terashima , Makoto Kikuchi , Katsuyuki Murashiro
发明人： Kanetsugu Terashima , Makoto Kikuchi , Katsuyuki Murashiro
IPC分类号： G02F1/13 , C09K19/34 , C09K19/42 , C09K19/46 , C09K19/12 , C09K19/20
CPC分类号： C09K19/46 , C09K19/42
摘要： A ferroelectric liquid crystal composition is provided exhibiting an Sc* phase over a wide temperature range including room temperature and having a spontaneous polarization value of 30 nC/cm.sup.2 or less and a quick response, time. An optical switching element comprising the ferroelectric liquid crystal composition is also provided. The ferroelectric liquid crystal composition comprises components A, B, C and D in respective amounts by weight of 75 to 95%, 3 to 9%, and 3 to 12% and 2 to 5% based on the total amount of these components and having a phase sequence series of an isotropic liquid, a cholesteric phase, a smectic A phase and a chiral smectic C phase in that order from the high temperature side and a spontaneous polarization value of 30 nC/cm.sup.2 or less.The component A is at least one compound selected from the group consisting of compounds represented by the general formulae: ##STR1## The component B is at least one compound selected from the group consisting of compounds represented by the general formulae: ##STR2## The component C is at least one compound selected from the group consisting of compounds represented by the general formula: ##STR3## In the above formulae, R.sup.1 to R.sup.10, X, m, n and * are as defined in the claims.
摘要翻译：提供一种铁电液晶组合物，其在包括室温的宽温度范围内具有30nC / cm 2以下的自发极化值和快速响应时间的Sc *相。还提供了包括铁电液晶组合物的光学开关元件。所述强电介质液晶组合物包含组分A，B，C和D各自的量为75至95％，3至9％，3至12％和2至5％，基于这些组分的总量，并具有各向同性液体，胆甾醇相，近晶A相和手性近晶C相的相序列，从高温侧开始，自发极化值为30nC / cm 2以下。组分A是选自由以下通式表示的化合物中的至少一种化合物：（*化学结构*）和（*化学结构*）组分B是至少一种选自化合物通式：（*化学结构*）（*化学结构*）和（*化学结构*）（*化学结构*）组分C是选自由通式（*化学结构*）在上式中，R 1至R 10，X，m，n和*如权利要求中所定义。

23. 发明授权

US5188761A Ferroelectric liquid crystal composition and light switching element comprising the same 失效
标题翻译：含铁液晶组合物和包含其的光开关元件
公开(公告)号：US5188761A
公开(公告)日：1993-02-23
申请号：US505154
申请日：1990-04-05
申请人： Kanetsugu Terashima , Makoto Kikuchi , Katsuyuki Murashiro
发明人： Kanetsugu Terashima , Makoto Kikuchi , Katsuyuki Murashiro
IPC分类号： G02F1/13 , C09K19/34 , C09K19/42 , C09K19/46
CPC分类号： C09K19/46 , C09K19/42
摘要： A ferroelectric liquid crystal composition, exhibiting an Sc* phase over a wide temperature range including room temperature and having a spontaneous polarization value of 30 nc/cm.sup.2 or less and a quick response time, is provided. An optical switching element, comprising the ferroelectric liquid crystal composition, is also provided. The ferroelectric liquid crystal composition comprises three components A, B and C in respective amount by weight of 75 to 95%, 3 to 9% and 3 to 12% based on the total amount of these components and having a phase sequence series of Iso-N*-Sa-Sc*. Component A is at least one compound selected from the group consisting of the compounds represented by the general formulae: ##STR1## The component B is at least one compound selected from the group consisting of compounds represented by the general formulae: ##STR2## The component C is at least one compound selected from the group consisting of compounds represented by the general formulae: ##STR3## In the above formulae, R.sup.1 to R.sup.10, X, m, n and * are as defined in the claims.

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