Tolane derivative, liquid crystal composition containing the derivative, and liquid crystal display device using the composition
申请人:SEIKO EPSON CORPORATION
公开号:EP0535635A1
公开(公告)日:1993-04-07
A tolane derivative of a formula:
where R represents a linear alkyl group having from 1 to 10 carbon atoms; X1, X2 and X3 each 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.
Effect
The compound is well compatible with other liquid crystal compounds. By blending the compounds with ordinary liquid crystal compounds, a liquid crystal composition having a broadened practical temperature range and an enlarged double refraction anisotropy is obtained.
式中的一种甲苯衍生物:
其中 R 代表具有 1 至 10 个碳原子的直链烷基;X1、X2 和 X3 分别代表氟原子或氢原子,条件是其中一个必须是氟原子,其他的是氢原子;Y 代表腈基或具有 1 至 10 个碳原子的直链烷基;以及含有该衍生物的液晶组合物;和具有该组合物的液晶显示装置。
功效
该化合物与其他液晶化合物具有良好的兼容性。通过将该化合物与普通液晶化合物混合,可获得实用温度范围更广、双折射各向异性更大的液晶组合物。