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    Ferroelectric liquid crystal composition
    3.
    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。

    Ferroelectric liquid crystal composition
    9.
    发明授权
    Ferroelectric liquid crystal composition 失效
    铁电液晶组成

    公开(公告)号：US5149461A

    公开(公告)日：1992-09-22

    申请号：US733183

    申请日：1991-07-19

    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： C09K19/04 ,  C09K19/34 ,  C09K19/46

    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。

    Ferroelectric liquid crystal composition
    10.
    发明授权
    Ferroelectric liquid crystal composition 失效
    电磁液晶组合物

    公开(公告)号：US5106531A

    公开(公告)日：1992-04-21

    申请号：US476878

    申请日：1990-02-07

    申请人： Katsuyuki Murashiro ,  Makoto Kikuchi ,  Mitsuyoshi Ichihashi ,  Kanetsugu Terashima ,  Masaharu Seki

    发明人： Katsuyuki Murashiro ,  Makoto Kikuchi ,  Mitsuyoshi Ichihashi ,  Kanetsugu Terashima ,  Masaharu Seki

    IPC分类号： G02F1/137 ,  C09K19/34 ,  C09K19/42 ,  C09K19/46 ,  G02F1/13 ,  G02F1/141

    CPC分类号： C09K19/3458

    摘要： The present invention provides a ferroelectric liquid crystal composition which can exhibit an S.sub.C * phase in an extensive temperature range inclusive of room temperature and which has quick response properties and a large tilt angle, and it also provides a switching element containing the above-mentioned ferroelectric liquid crystal composition and having excellent response properties.The present invention is connected with a ferroelectric liquid crystal composition comprising at least one component A and at least one component B described hereinafter, the content of said component A being from 30 to 95% by weight, the content of said component B being from 5 to 50% by weight,said component A being a compound represented by the formula (I) ##STR1## wherein R.sup.1 is an alkoxy group having 3 to 14 carbon atoms, k is an integer of 1 and R.sup.2 is an optically active group,said component B being a ferroelectric liquid crystal compound having a spontaneous polarization of 10 nCcm.sup.-2 or more.