Liquid crystal compound, liquid crystal composition and liquid crystal display device
申请人:JNC CORPORATION
公开号:US10208249B2
公开(公告)日:2019-02-19
Provided are a liquid crystal compound satisfying at least one of physical properties such as high stability to heat or light, high maximum temperature of a liquid-crystal phase, low minimum temperature thereof, small viscosity, suitable optical anisotropy, large dielectric anisotropy and good compatibility with other liquid-crystal compounds, a liquid crystal composition containing the compound and a liquid crystal display device including the composition.
A compound is represented by formula (1), a liquid crystal composition contains the compound and a liquid crystal display device includes the composition.
In formula (1), Ra and Rb are fluorine or alkyl; A0, A1 and A2 are 1,4-phenylene; Z1 and Z2 are a single bond or alkylene; one of Y1 and Y2 is fluorine, and the other is hydrogen; Rc is alkyl; and a and b are independently 0, 1, 2 or 3, and a sum of a and b is 0, 1, 2 or 3.
本发明提供了一种液晶化合物,该化合物至少满足以下物理特性之一:对热或光的稳定性高、液晶相的最高温度高、最低温度低、粘度小、光学各向异性合适、介电各向异性大以及与其他液晶化合物的兼容性好;一种含有该化合物的液晶组合物和一种包括该组合物的液晶显示设备。
一种化合物用式(1)表示,一种液晶组合物包含该化合物,一种液晶显示设备包含该组合物。
在式 (1) 中,Ra 和 Rb 是氟或烷基;A0、A1 和 A2 是 1,4-亚苯基;Z1 和 Z2 是单键或亚烷基;Y1 和 Y2 中的一个是氟,另一个是氢;Rc 是烷基;a 和 b 独立地为 0、1、2 或 3,a 和 b 之和为 0、1、2 或 3。