Liquid crystal composition, liquid crystal device, display apparatus and display method
申请人:CANON KABUSHIKI KAISHA
公开号:EP0460624A2
公开(公告)日:1991-12-11
A liquid crystal composition comprising at least one mesomorphic compound represented by the following
formula (I):
wherein R1 and R2 respectively denote a linear or branched alkyl group having 1 - 16 carbon atoms optionally substituted; Z1 denotes a single bond, -0-, -COO- or -OCO-, X1 denotes halogen; and A1 denotes a single bond or
and at least one mesomorphic compound represented by the following formula (II):
wherein R3 and R4 respectively denote an alkyl group having 2 - 16 carbon atoms optionally substituted; Y1 denotes a single bond,
Z2 and Z3 respectively denote a single bond, -0-,
or
A2 and A3 respectively denote a single bond,
X2 and X3 respectively denote hydrogen, F, Cl, Br, -CH3, -CN or -CF3; and k is 0 or 1 with the proviso that Z2 is a single bond when A2 is a single bond, and Z3 is a single bond when As is a single bond and k is 0. The liquid crystal composition is easily aligned by a simple rubbing method to provide a uniform monodomain and further provides wider driving voltage and temperature margins effective for providing a practical ferroelectric liquid crystal device.
一种液晶组合物,包含至少一种由以下物质代表的介晶化合物
式(I)
其中 R1 和 R2 分别表示具有 1 - 16 个碳原子的直链或支链烷基,任选被取代;Z1 表示单键、-0-、-COO- 或-OCO-;X1 表示卤素;以及 A1 表示单键或-0-、-COO- 或-OCO-。
以及至少一种由下式(II)代表的中间体化合物:
其中 R3 和 R4 分别表示具有 2-16 个碳原子的烷基,任选被取代;Y1 表示单键、
Z2 和 Z3 分别表示单键、-0-、
或
A2 和 A3 分别表示单键、
X2 和 X3 分别表示氢、F、Cl、Br、-CH3、-CN 或 -CF3;k 为 0 或 1,但当 A2 为单键时,Z2 为单键;当 As 为单键且 k 为 0 时,Z3 为单键。液晶组合物很容易通过简单的摩擦方法对齐,以提供均匀的单域,并进一步提供更宽的驱动电压和温度余量,从而有效地提供实用的铁电液晶器件。