Liquid crystal compounds exhibiting ferroelectric behavior and favorable spontaneous polarization values are disclosed and have the formula
wherein Ar is p-phenylene or p,p'-biphenylene; L is a linking group selected from -CH2-, -0-,
n is an integer one or two; each of Z and Z' is alkyl, alkoxy, alkoxyalkyl or an optically active group containing an asymmetric center; at least one of Z and Z' being said optically active group containing an asymmetric center. Compounds exhibiting the chiral smectic C phase are particularly suited to application in a ferroelectric display device.
本发明公开了具有
铁电行为和良好自发极化值的液晶化合物,其
化学式为
其中 Ar 是对亚苯基或 p,p'-
联苯;L 是选自-
CH2-、-0-和- -的连接基团、
n是一个或两个整数;Z和Z'中的每一个都是烷基、烷氧基、烷氧基烷基或含有不对称中心的光学活性基团;Z和Z'中至少有一个是上述含有不对称中心的光学活性基团。表现出手性 Smectic C 相的化合物特别适合应用于
铁电显示设备。