FLUORINE-SUBSTITUTED LIQUID-CRYSTAL COMPOUND, LIQUID-CRYSTAL COMPOSITION AND LIQUID-CRYSTAL DISPLAY DEVICE
申请人:CHISSO CORPORATION
公开号:EP0820976A1
公开(公告)日:1998-01-28
An object of the present invention is to provide a novel liquid crystalline compound having a large dielectric anisotropy, small change in threshold voltage depending on temperature, and an improved solubility to other liquid crystal materials at low temperatures, and expressed by the following general formula (1):
wherein R represents, for example, an alkyl group or alkoxy group having 1 to 10 carbon atoms, m and n are independently 0 or 1, A1, A2, and A3 are independently, for example, trans-1,4-cyclohexylene group, 1,4-phenylene group one or more hydrogen atoms on the ring of which may be replaced by F, Z1, Z2, and Z3 independently represent -COO-, -OCO-, -(CH2)2-, -CH2O-, -OCH2-, or a covalent bond provided that at least one of Z1, Z2, and Z3 represents ester bond, -CH2O-, or -OCH2-, X represents, for example, CF3, CF2H, and Y represents H or F. Another object of the present invention is to provide a liquid crystal composition containing the liquid crystalline compound.
本发明的目的是提供一种新型液晶化合物,该化合物具有较大的介电各向异性,阈值电压随温度的变化较小,并且在低温下的溶解性优于其他液晶材料,其通式(1)如下:
其中 R 代表例如具有 1 至 10 个碳原子的烷基或烷氧基,m 和 n 独立地为 0 或 1,A1、A2 和 A3 独立地为例如反式-1,4-环己烯基、1,4-亚苯基,其环上的一个或多个氢原子可被 F 取代、Z1、Z2 和 Z3 独立地代表-COO-、-OCO-、-(CH2)2-、-CH2O-、-OCH2-或共价键,条件是 Z1、Z2 和 Z3 中至少有一个代表酯键、-CH2O-或-OCH2-,X 代表例如 CF3、CF2H,Y 代表 H 或 F。本发明的另一个目的是提供一种含有液晶化合物的液晶组合物。