申请人:Seiko Epson Corporation
公开号:US05437815A1
公开(公告)日:1995-08-01
A tolan derivative of a formula: ##STR1## where R represents a linear alkyl group having from 1 to 10 carbon atoms; X.sub.1, X.sub.2 and X.sub.3 independently represent a fluorine atom or a hydrogen atom, provided that one of them is necessarily a fluorine atom and the others are hydrogen atoms; and Y represents a nitrile group or a linear alkyl group having from 1 to 10 carbon atoms; and a liquid crystal composition containing the derivatives; and a liquid crystal display device having the composition are produced. The compound is compatible with other liquid crystal compounds, and by blending the compound with ordinary liquid crystal compounds, a liquid crystal composition having a broadened practical temperature range and an enlarged double refraction anisotropy is obtained.
一种公式的托兰衍生物:##STR1##其中R代表具有1到10个碳原子的线性烷基基团;X.sub.1、X.sub.2和X.sub.3分别表示氟原子或氢原子,前提是其中之一必须是氟原子,另外两个是氢原子;Y代表腈基团或具有1到10个碳原子的线性烷基基团;以及含有这些衍生物的液晶组合物;以及具有该组合物的液晶显示装置。该化合物与其他液晶化合物兼容,通过将该化合物与普通液晶化合物混合,可以获得具有扩展实用温度范围和增大双折射各向异性的液晶组合物。