发明授权
- 专利标题: Vinylene compounds and liquid-crystal composition
- 专利标题(中): 维尼尼亚化合物和液晶组成
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申请号: US09125685申请日: 1998-08-24
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公开(公告)号: US06337034B1公开(公告)日: 2002-01-08
- 发明人: Tomoyuki Kondo , Shuichi Matsui , Kazutoshi Miyazawa , Yasuko Sekiguchi , Etsuo Nakagawa
- 申请人: Tomoyuki Kondo , Shuichi Matsui , Kazutoshi Miyazawa , Yasuko Sekiguchi , Etsuo Nakagawa
- 优先权: JP8-061935 19960223
- 主分类号: C09K1930
- IPC分类号: C09K1930
摘要:
Liquid crystalline compounds which have a wide temperature range of liquid crystal phase, low viscosity, and improved threshold voltage; liquid crystal compositions; and liquid crystal display devices comprising the composition can be provided; and the liquid crystalline compounds are expressed by the general formula (1) Ra—A1—Z1—A2—Z2—A3—(Z3—A4)m—Rb (1) wherein Ra represents an alkyl group having 1 to 20 carbon atoms one or more —CH2— in which alkyl group may be replaced by —O— or the like, and one or more hydrogen atoms in which alkyl group may be replaced by a halogen atom; Rb represents Ra, a halogen atom, or cyano group; A1, A2, A3, and A4 independently represent a divalent ring group; Z1, Z2, and Z3 independently represent an alkenylene group having 2 to 4 carbon atoms, —COO—, a covalent bond, or the like provided that at least one of Z1 to Z3 represents an alkenylene group having 2 to 4 carbon atoms, and at least one of Z1 to Z3 represents —COO— or —OCO—; and m is 0 or 1.