申请人:Chisso Corporation
公开号:US06149990A1
公开(公告)日:2000-11-21
A compound represented by the following general formula (I), a liquid crystal composition comprising the same, and a liquid crystal element using this liquid crystal composition. ##STR1## (wherein B.sub.1 and B.sub.2 represent independently a trans-1,4-cyclohexylene group or a 1,4-phenylene group wherein at least one hydrogen atom on the six-membered ring is optionally substituted by a halogen atom, Y represents a halogen-substituted alkyl group having 1 to 3 carbon atoms, a halogen-substituted alkoxy group having 1 to 3 carbon atoms, a cyano group, a fluorine atom or a chlorine atom, X represents a fluorine atom, a chlorine atom or a hydrogen atom, R.sub.1 represents an alkyl group having 1 to 10 carbon atoms or an alkoxy group having 1 to 10 carbon atoms, n and m represent independently 1 or 2 and p represents 0 or 1.) The compound of the present invention exhibits a large dielectric anisotropy, low threshold voltage, and favorable temperature-dependency of threshold voltage, as well as a favorable miscibility with a known liquid crystal compound, and therefore a liquid crystal composition comprising the compound can provide low voltage-operable liquid crystal display elements.
以下是一种由下列通式(I)表示的化合物,包含该化合物的液晶组合物,以及使用该液晶组合物的液晶元件。 ##STR1## (其中B1和B2分别表示可独立表示为具有1,4-苯基环或1,4-环己基环的卤素取代的烷基基团,其中六元环上的至少一个氢原子可选择性地被卤素原子取代,Y表示具有1至3个碳原子的卤素取代的烷基基团,具有1至3个碳原子的卤素取代的烷氧基,氰基,氟原子或氯原子,X表示氟原子,氯原子或氢原子,R1表示具有1至10个碳原子的烷基基团或具有1至10个碳原子的烷氧基,n和m独立地表示1或2,p表示0或1。)本发明的化合物表现出较大的介电各向异性,低阈值电压和有利的阈值电压温度依赖性,以及与已知液晶化合物的良好混溶性,因此,包含该化合物的液晶组合物可以提供低电压操作的液晶显示元件。