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    Ferroelectric liquid crystal composition
    11.
    发明授权
    Ferroelectric liquid crystal composition 失效
    铁电液晶组成

    公开(公告)号：US5021190A

    公开(公告)日：1991-06-04

    申请号：US408500

    申请日：1989-08-25

    申请人： Makoto Kikuchi ,  Kanetsugu Terashima ,  Mitsuyoshi Ichihashi ,  Fusayuki Takeshita ,  Kenji Furukawa

    发明人： Makoto Kikuchi ,  Kanetsugu Terashima ,  Mitsuyoshi Ichihashi ,  Fusayuki Takeshita ,  Kenji Furukawa

    IPC分类号： C09K19/42 ,  C09K19/46 ,  G02F1/137 ,  G02F1/141

    CPC分类号： C09K19/46 ,  C09K19/42

    摘要： The present invention relates to a ferroelectric liquid crystal composition having quick response and comprising a smectic liquid crystal compound and an optically active compound.The ferroelectric liquid crystal composition comprises components A and B, said component A comprising a compound represented by the formula: ##STR1## and/or a compound represented by the formula: ##STR2## said component B comprising a compound represented by the formula: ##STR3## and/or a compound represented by the formula: ##STR4## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.5 are each an alkyl or alkoxy group of 1 to 18 carbon, R.sup.4 and R.sup.6 are each an alkyl group of 2 to 18 carbon atoms or an alkoxy group of 1 to 18 carbon atoms, X and Y are each --CH.sub.2 O--, --OCH.sub.2 --, ##STR5## m, n, k and l are each an integer of 1 or 2 and * is an asymmetric carbon atom, the component A to component B ratio being 1.5 or less. This ferroelectric liquid crystal composition can be used in a light switching element for the purpose of imparting quick response to the light switching element.

    Ferroelectric liquid crystal composition
    12.
    发明授权
    Ferroelectric liquid crystal composition 失效
    铁电液晶组成

    公开(公告)号：US4826621A

    公开(公告)日：1989-05-02

    申请号：US204252

    申请日：1988-06-09

    申请人： Kanetsugu Terashima ,  Mitsuyoshi Ichihashi ,  Makoto Kikuchi ,  Fusayuki Takeshita ,  Kenji Furukawa

    发明人： Kanetsugu Terashima ,  Mitsuyoshi Ichihashi ,  Makoto Kikuchi ,  Fusayuki Takeshita ,  Kenji Furukawa

    IPC分类号： C09K19/20 ,  C09K19/34 ,  C09K19/46 ,  G02F1/13

    CPC分类号： C09K19/3463 ,  C09K19/46

    摘要： A ferroelectric liquid crystal composition comprising smectic liquid crystal compound(s) and optically active compound(s) and having high-speed response properties and a light switching element containing the same are provided, which composition comprises the following three liquid crystal components A, B and C, the respective proportions thereof being 10 to 70%, 10 to 50% and 10 to 40% each by weight based on the total weight of these components, respectively:liquid crystal component A:at least one compound selected from compounds of the formula ##STR1## wherein R.sup.1 and R.sup.2 each are 1-18C alkyl, and compounds of the formula ##STR2## wherein R.sup.3 and R.sup.4 each are 1-18C alkyl or alkoxy; liquid crystal compound B:at least one compound of the formula ##STR3## wherein R.sup.5 is a 1-18C alkyl, n is an integer of 0 to 10 and * indicates asymmetric carbon; andliquid crystal component C:at least one compound selected from compounds of the formula ##STR4## wherein R.sup.6 is 1-18C alkyl or alkoxy and * is as defined above; and compounds of the formula ##STR5## wherein R.sup.7 is 1-18 alkyl or alkoxy and * is as defined above.

    Ferroelectric liquid crystal composition
    14.
    发明授权
    Ferroelectric liquid crystal composition 失效
    电磁液晶组合物

    公开(公告)号：US5190691A

    公开(公告)日：1993-03-02

    申请号：US388500

    申请日：1989-08-02

    申请人： Makoto Kikuchi ,  Fusayuki Takeshita ,  Mitsuyoshi Ichihashi ,  Kanetsugu Terashima ,  Kenji Furukawa

    发明人： Makoto Kikuchi ,  Fusayuki Takeshita ,  Mitsuyoshi Ichihashi ,  Kanetsugu Terashima ,  Kenji Furukawa

    IPC分类号： G02F1/13 ,  C09K19/20 ,  C09K19/34 ,  C09K19/46 ,  G02F1/137 ,  G02F1/141

    CPC分类号： C09K19/20 ,  C09K19/2021 ,  C09K19/46

    摘要： The present invention provides a ferroelectric liquid crystal composition wherein the phase transition series of the composition assumes an order of isotropic liquid.fwdarw.cholesteric phase.fwdarw.chiral smectic C phase starting from the high temperature and to a switching element good in contrast, and memory properties using the same. The composition comprises a composition that contains a component A of a compound having the formula: ##STR1## and/or a compound having the formula: ##STR2## wherin R.sup.1 and R.sup.2 represent each an alkyl group having 1 to 18 carbon atoms;a component B of a compound of the formula: ##STR3## a component C of a compound of the formula: ##STR4## and a component D of a compound of the formula: ##STR5## wherein R.sup.3, R.sup.4, R.sup.5, R.sup.7, and R.sup.8 represent each an alkyl group or alkoxy group having 1 to 18 carbon atoms, x represents ##STR6## Y and Z represent each a hydrogen atom, or a halogen atom, n is an integer of 0 to 10, and * indicates an asymmetric carbon atom; andwith the proportion of said component A being 20 to 80 wt. %, that of the component B being 5 to 30 wt. %, that of said component C being 3 to 10 wt. %, and that of said component D being 3 to 20 wt. %, based on the total amount of said four components A, B, C and D.

    Ferroelectric liquid crystal composition
    15.
    发明授权
    Ferroelectric liquid crystal composition 失效
    铁电液晶组成

    公开(公告)号：US5064568A

    公开(公告)日：1991-11-12

    申请号：US276389

    申请日：1988-11-25

    申请人： Kanetsugu Terashima ,  Mitsuyoshi Ichihashi ,  Makoto Kikuchi ,  Fusayuki Takeshita ,  Kenji Furukawa

    发明人： Kanetsugu Terashima ,  Mitsuyoshi Ichihashi ,  Makoto Kikuchi ,  Fusayuki Takeshita ,  Kenji Furukawa

    IPC分类号： C09K19/54 ,  C09K19/04 ,  C09K19/34 ,  C09K19/42 ,  C09K19/44 ,  C09K19/46 ,  G02F1/13

    CPC分类号： C09K19/46 ,  C09K19/04 ,  C09K19/3441

    摘要： A ferroelectric liquid crystal composition is here provided which contains at least one chiral compound having an optical activity site group represented by the general formula (I) ##STR1## wherein R.sup.1 is a straight-chain or branched alkyl group or alkoxy group having 1 to 18 carbon atoms, and * indicates an asymmetric carbon atom, and at least one non-chiral compound having a smectic C phase, a smectic I phase, a smectic F phase, a smectic G phase, a smectic H phase, a smectic J phase or a smectic K phase. This composition has quick response properties and assumes an SC* phase in an extensive temperature range inclusive of room temperature. Furthermore, by using this composition, an optical switching element having quick responsiveness can be obtained.

    摘要翻译： 这里提供一种铁电液晶组合物，其含有至少一种具有由通式（I）表示的光学活性位点基团的手性化合物，其中R1是直链或支链烷基或具有 1〜18个碳原子，*表示不对称碳原子，以及至少一种具有近晶C相，近晶I相，近晶F相，近晶G相，近晶H相，近晶相的非手性化合物 J相或近晶相。 该组合物具有快速的响应特性并且在包括室温的广泛温度范围内呈现SC *相。 此外，通过使用该组合物，可以获得具有快速响应性的光学开关元件。

    Smectic liquid crystal mixture
    18.
    发明授权
    Smectic liquid crystal mixture 失效
    近晶液晶混合物

    公开(公告)号：US4882083A

    公开(公告)日：1989-11-21

    申请号：US200016

    申请日：1988-05-27

    申请人： Kanetsugu Terashima ,  Mitsuyoshi Ichihashi ,  Fusayuki Takeshita ,  Makoto Kikuchi ,  Kenji Furukawa

    发明人： Kanetsugu Terashima ,  Mitsuyoshi Ichihashi ,  Fusayuki Takeshita ,  Makoto Kikuchi ,  Kenji Furukawa

    IPC分类号： C09K19/42 ,  C09K19/34 ,  C09K19/46 ,  C09K19/54 ,  G02F1/13 ,  G02F1/137

    CPC分类号： C09K19/3458

    摘要： A smectic C liquid crystal mixture having a broad smectic C phase temperature range including room temperature, a ferroelectric smectic C liquid crystal mixture having a large spontaneous polarization, comprising the above smectic C mixture and at least one optically active compound, and a liquid crystal display element having an improved response time, containing the above ferroelectric smectic C liquid crystal mixture are provided, which smectic C liquid crystal mixture comprises(1) at least two components at least one of which is a pyrimidine compound expressed by the formula ##STR1## wherein R.sup.1 represents a linear alkyl group of 4 to 20 carbon atoms and R.sup.2 represents a linear alkyl group having 7-20 carbons and having a smectic C phase;(2) at least one pyrimidine compound of the formula (I) and at least one pyrimidine compound expressed by the formula ##STR2## wherein R.sup.3 represents a linear alkyl group of 6 to 12 carbon atoms and R.sup.4 represents a linear alkyl group having 8 to 11 carbons and having a smectic C phase; or(3) at least one pyrimidine compound of the formula (I) and at least one biphenylpyrimidine compound expressed by the formula ##STR3## wherein R.sup.5 and R.sup.6 each are a linear alkyl or alkoxy group each having 1-18 carbons.

    Ferroelectric liquid crystal composition
    19.
    发明授权
    Ferroelectric liquid crystal composition 失效
    铁电液晶组成

    公开(公告)号：US5141670A

    公开(公告)日：1992-08-25

    申请号：US417050

    申请日：1989-10-04

    申请人： Mitsuyoshi Ichihashi ,  Kanetsugu Terashima ,  Makoto Kikuchi ,  Fusayuki Takeshita ,  Kenji Furukawa

    发明人： Mitsuyoshi Ichihashi ,  Kanetsugu Terashima ,  Makoto Kikuchi ,  Fusayuki Takeshita ,  Kenji Furukawa

    IPC分类号： G02F1/13 ,  C09K19/20 ,  C09K19/34 ,  C09K19/46 ,  G02F1/137 ,  G02F1/141

    CPC分类号： C09K19/20 ,  C09K19/2021 ,  C09K19/46

    摘要： A ferroelectic smectic C liquid crystal mixture and a display element having a quick electrooptical response and a good memory property are provided, the ferroelectric mixture having a Ps of 60 nC/cm2 or more and a tilt angle of 24.degree. or more and comprising(A) a first component comprising at least one optically active compound expressed by the formula ##STR1## wherein l and m are 0 or 1, both are not 1; n is an integer of 3 to 8; X and Y are H, F, Cl, or CN, both X and Y are not H; A is --COO-- or --OCO--; and R is C3--8 alkyl or alkoxy , and(B) a second component comprising at least one optically active compound expressed by the formula ##STR2## wherein l, m, n and R are as defined above; and A is --COO--, --OCO--, --CH.sub.2 O-- or --OCH.sub.2 --, a total content of the first and second components being 60 mol % or more in the mixture.

    摘要翻译： 提供了铁电型近晶C液晶混合物和具有快速电光响应和良好记忆性的显示元件，该铁电混合物具有60nC / cm 2以上的Ps和24°以上的倾斜角，并且包含（A ）包含由式（I）表示的至少一种光学活性化合物的第一组分，其中l和m为0或1，两者均不为1; n为3〜8的整数， X和Y是H，F，Cl或CN，X和Y都不是H; A是-COO-或-OCO-; 和（B）第二组分，其包含至少一种由式（II）表示的光学活性化合物，其中l，m，n和R如上定义; 且A为-COO-，-OCO-， - CH 2 O-或-OCH 2 - ，该混合物中第一和第二组分的总含量为60mol％或更多。