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    Mesomorphic compound, liquid crystal composition, liquid crystal device, display apparatus and display method
    8.
    发明授权
    Mesomorphic compound, liquid crystal composition, liquid crystal device, display apparatus and display method 失效

    公开(公告)号：US5217645A

    公开(公告)日：1993-06-08

    申请号：US759442

    申请日：1991-09-13

    申请人： Takashi Iwaki ,  Takao Takiguchi ,  Takeshi Togano ,  Yoko Yamada ,  Shinichi Nakamura

    发明人： Takashi Iwaki ,  Takao Takiguchi ,  Takeshi Togano ,  Yoko Yamada ,  Shinichi Nakamura

    IPC分类号： G02F1/13 ,  C07F7/08 ,  C07F7/10 ,  C09K19/40 ,  C09K19/42

    CPC分类号： C09K19/406 ,  C07F7/0812

    摘要： A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 2-16 carbon atoms capable of including one or non-neighboring two methylene groups which can be replaced with --O--, --S--, --CO--, --COO-- or --OCO-- and capable of including a hydrogen atom which can be replaced with a fluorine atom; A denotes --A.sub.1 -- or --A.sub.1 --A.sub.2 --; B.sub.2 denotes --B.sub.3 -- or --B.sub.3 --B.sub.4 --; A.sub.1, A.sub.2, B.sub.1, B.sub.3 and B.sub.4 independently denote ##STR2## wherein Y.sub.1 and Y.sub.2 independently denote a hydrogen atom, F, Cl, Br, --CH.sub.3, --CN or --CF.sub.3, with the proviso that B.sub.1 can be a single bond; Z.sub.1 and Z.sub.2 independently denote a single bond, --COO--, --OCO--, --CH.sub.2 O-- or --OCH.sub.2 --; Z.sub.3 denotes --O--, --CO--, --COO-- or --OCO--; R.sub.2, R.sub.3 and R.sub.4 independently denote a linear or branched alkyl group having 1--16 carbon atoms capable of including one or two methylene groups, other than those directly connected to Si, which can be replaced with --O--, --COO-- or --OCO-- with the proviso that --O-- cannot directly be connected to --O--; 1 and m independently denote 0 or 1 with the proviso that 1+m.noteq.0; n is an integer of 1-12; and X and Q independently denote CH or N with the proviso that X and Q cannot be N simultaneously. The mesomorphic compound is effective for providing a ferroelectric liquid crystal composition showing an improved low-temperature operation characteristic and a decreased temperature-dependence of response speed.