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公开(公告)号：US5417885A
公开(公告)日：1995-05-23
申请号：US101026
申请日：1993-08-03
CPC分类号： C09K19/0266 , C07C69/94 , C09K19/126 , C09K2019/123
摘要： An antiferroelectric liquid crystal compound of the following formulae: ##STR1## wherein R.sup.1 and R.sup.2 each is an alkyl group of C.sub.4 - C.sub.18, Rf is CF.sub.3 or C.sub.2 F.sub.5, X is O, COO, or a single bond, and * shows an optically active carbon atom.
摘要翻译： （I）其中R 1和R 2各自为C 4 -C 18的烷基，R f为CF 3或C 2 F 5，X为（C 1 -C 6） O，COO或单键，*表示光学活性碳原子。
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2.发明授权
公开(公告)号：US5046823A
公开(公告)日：1991-09-10
申请号：US328363
申请日：1989-03-24
申请人： Kahoru Mori , Yuichiro Yamada , Norio Yamamoto , Masao Tokunaga , Ichiro Kawamura , Yoshiichi Suzuki , Takashi Hagiwara , Yoshihiko Aihara , Noriko Yamakawa , Shigenori Sakuma
发明人： Kahoru Mori , Yuichiro Yamada , Norio Yamamoto , Masao Tokunaga , Ichiro Kawamura , Yoshiichi Suzuki , Takashi Hagiwara , Yoshihiko Aihara , Noriko Yamakawa , Shigenori Sakuma
CPC分类号： C09K19/2028 , C09K19/2021 , G02F1/141 , G09G3/3633 , G09G3/3681 , G09G3/3692 , G09G2310/06 , G09G2310/061
摘要： There is disclosed herein a ferroelectric liquid crystal electro-optical apparatus of the maxtrix type comprising a liquid crystal cell having first and second electrode substrates which include n striped line electrodes and m striped column electrodes, respectively, facing at right angles each other. A ferroelectric liquid crystal is put in therebetween so as to form n by m indication picture elements. Also included in the apparatus a scanning drive device adapted to supply a scanning signal and a data signal to the n striped line electrodes and the m striped column electrodes, respectively. The ferroelectric liquid crystal shows three stable states in accordance with an application voltage and has a light transmittance with a hysteresis sufficient to a dynamic drive in accordance with increase or decrease in the application voltage in a predetermined voltage range. The scanning drive device produces a first combination signal as a signal running to variation from a voltage below a refernece voltage in a predetermined one polarity voltage range to a voltage above the reference voltage and produces a second combination signal as a signal which does not exceed the reference voltage in the range, and supplies a direct-current combination signal between the electrodes after the supply of the first and second combination signal thereto.
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公开(公告)号：US5262086A
公开(公告)日：1993-11-16
申请号：US903953
申请日：1992-06-26
IPC分类号： C07C69/773 , C09K19/02 , C09K19/20 , C09K19/12 , C07C69/76
CPC分类号： C09K19/0266 , C09K19/2021
摘要： (R)- and (S)-enantiomer composition represented by the formula (I) having sufficient high optical purity for exhibiting optically tristable states in S*(3) phase; ##STR1## wherein Ra means a C.sub.5 -C.sub.14 alkyl group or a C.sub.5 -C.sub.14 alkoxy group, preferably a C.sub.5 -C.sub.14 alkyl group, Rb means a C.sub.4 -C.sub.12 normal alkyl group or a C.sub.4 -C.sub.12 branched alkyl group, X means a ##STR2## group or a ##STR3## group, Z means a fluorine containing alkyl group, preferably a trifluoromethyl group and * shows an optically active carbon.
摘要翻译： （I）表示的（S） - 对映异构体组合物具有足够高的光学纯度以在S *（3）相中显示光学三态状态; （I）其中R a表示C 5 -C 14烷基或C 5 -C 14烷氧基，优选C 5 -C 14烷基，R b表示C 4 -C 12正烷基或C 4 -C 12支链烷基，X 表示
组或 组，Z表示含氟烷基，优选三氟甲基，*表示光学活性碳。 -
公开(公告)号：US5204020A
公开(公告)日：1993-04-20
申请号：US875609
申请日：1992-04-29
IPC分类号： C07C69/773 , C09K19/02 , C09K19/20
CPC分类号： C09K19/0266 , C09K19/2021
摘要： Liquid crystal compounds represented by the formula; ##STR1## in which Ra means an alkyl group of 1-20 carbon atoms or an alkoxy group of 1-20 carbon atoms; Rb means an aliphatic alkyl group, a branched alkyl group or an aralkyl group respectively of 1-20 carbon atoms, an alkoxy group of 1-20 carbon atoms, or an alkanoyl methyl group having 1-20 carbon atoms in the alkyl; ##STR2## Z means a fluorinated alkyl or a fluorinated haloalkyl; m is an integer of from 1 to 3; n is an integer of from 0 to 2 where when n is 0, Y is a single bond; and * shows an optically active center, which have a larger spontaneous polarization, high speed of response and good orientation, and show tristable liquid crystal phase.
摘要翻译： 由式表示的液晶化合物; 其中R a表示1-20个碳原子的烷基或1-20个碳原子的烷氧基; Rb表示1-20个碳原子的烷基，1-20个碳原子的烷氧基或在烷基中具有1-20个碳原子的烷酰基甲基的脂族烷基，支链烷基或芳烷基; Z表示氟化烷基或氟化卤代烷基; m为1〜3的整数， n为0〜2的整数，n为0时，Y为单键， 和*表示具有较大自发极化，高响应速度和良好取向的光学活性中心，并显示出三重液晶相。
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公开(公告)号：US5194179A
公开(公告)日：1993-03-16
申请号：US316195
申请日：1989-02-27
CPC分类号： C09K19/0266 , C09K19/20
摘要： The invention lies particularly in novel compounds represented by the general formula; ##STR1## in which Z means CF.sub.3, CHF.sub.2, CH.sub.2 F, CClF.sub.2, CCl.sub.2 F, CHCLF, CCl.sub.3, C.sub.2 F.sub.2 or a perfluoroalkyl group of 3 or more carbon atoms, m and n are same or different with each other and represent an integral of 1-20, which are ferroelectric and chiral smetic liquid crystals of a large spontaneous polarization, a high speed of response and a good orientation, and showing a liquid crystal phase of tristable state and an electoclinic effect to be used as a liquid crystal element superior in an image display response.
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公开(公告)号：US5207946A
公开(公告)日：1993-05-04
申请号：US557845
申请日：1990-07-25
IPC分类号： C07C69/017 , C07C69/773 , C07C69/90 , C09K19/02 , C09K19/20
CPC分类号： C09K19/0266 , C07C69/017 , C07C69/90 , C09K19/2021
摘要： A liquid crystal compound represented by formula (I): ##STR1## wherein R.sub.1 represents an alkyl group having from 3 to 18 carbon atoms; R.sub.2 represents an alkyl group having from 3 to 18 carbon atoms; X represents ##STR2## (A) and (B) each represents a group selected from the group consisting of ##STR3## and * indicates an optically active center.
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公开(公告)号：US5184847A
公开(公告)日：1993-02-09
申请号：US785877
申请日：1991-11-04
CPC分类号： C09K19/0266 , C09K19/2021
摘要： Ferrelectric chiral smetic liquid crystal compound are provided which have the formula, for example ##STR1## wherein R is a C.sub.1-20 alkyl group.
摘要翻译： 提供了具有下式的电介质手性硅溶液化合物，例如
或 其中R是C 1-20烷基。 -
公开(公告)号：US5837163A
公开(公告)日：1998-11-17
申请号：US953783
申请日：1992-09-30
IPC分类号： C07C69/017 , C07C69/773 , C07C69/90 , C09K19/02 , C09K19/20 , C09K19/12 , C07C69/76
CPC分类号： C09K19/0266 , C07C69/017 , C07C69/90 , C09K19/2021
摘要： A liquid crystal compound represented by formula (I): ##STR1## wherein R.sub.1 represents an alkyl group having from 3 to 18 carbon atoms; R.sub.2 represents an alkyl group having from 3 to 18 carbon atoms; X represents ##STR2## Y represents ##STR3## (A) and (B) each represents a group selected from the group consisting of ##STR4## and ##STR5## and * indicates an optically active center.
摘要翻译： 由式（I）表示的液晶化合物：其中R 1表示具有3至18个碳原子的烷基; R2表示具有3至18个碳原子的烷基; X表示
Y表示（IMA）（A），（B）表示选自由 和 组成的组，*表示光学活动中心。 -
公开(公告)号：US5116531A
公开(公告)日：1992-05-26
申请号：US573751
申请日：1990-08-28
IPC分类号： C07C69/773 , C07C69/90 , C07C69/94 , C09K19/02 , C09K19/20
CPC分类号： C09K19/0266 , C07C69/90 , C07C69/94 , C09K19/2021
摘要： A liquid crystal compound represented by formula (I): ##STR1## wherein R.sub.1 represents an alkyl group having from 5 to 18 carbon atoms; R.sub.2 represents an alkyl group having from 4 to 15 carbon atoms; X represents a single bond, --O--, ##STR2## and * indicates an optically active center. The compound exhibits three stable states of molecular orientation.
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公开(公告)号：US5130050A
公开(公告)日：1992-07-14
申请号：US599849
申请日：1990-10-19
IPC分类号： G02F1/1337 , C07C69/773 , C07C69/94 , C09K19/20 , G02F1/137 , G02F1/141
CPC分类号： C09K19/2021 , C07C69/94
摘要： A new tetrastable liquid crystal is provided which is useful for display and switching devices. The liquid crystal has the formula ##STR1## where R.sub.1 is a C.sub.5-18 alkyl group and R.sub.2 is a C.sub.4-15 alkyl group and * is an optically active center.
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