LIQUID CRYSTAL COMPOUND HAVING CF2O BONDING GROUP AND TOLANE BACKBONE, LIQUID CRYSTAL COMPOSITION, AND LIQUID CRYSTAL DISPLAY ELEMENT
申请人:JNC Corporation
公开号:EP3156388A1
公开(公告)日:2017-04-19
To provide a liquid crystal compound satisfying at least one of physical properties such as high chemical stability, a high clearing point, a low minimum temperature of a liquid crystal phase, low viscosity, large optical anisotropy, large dielectric anisotropy, a suitable elastic constant and excellent 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).
In formula (1), for example, R1 is alkyl having 1 to 15 carbons; ring A1, ring A2 and ring A3 are independently 1,4-phenylene, 2-halogeno-1,4-phenylene or 2,6-dihalogeno-1,4-phenylene; Z1 and Z2 are independently a single bond or -C≡C-, but at least one is -C≡C-; L1 is halogen, -OCF3 or -CF3; L2 and L3 are independently hydrogen or halogen, but at least one is halogen; and m and n are independently 0, 1 or 2, and a sum of m and n is 1 or 2.
目的:提供一种液晶化合物,该化合物至少满足以下物理特性中的一项:化学稳定性高、清澈点高、液晶相最低温度低、粘度低、光学各向异性大、介电各向异性大、弹性常数合适以及与其他液晶化合物的兼容性好;提供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。
例如,在式 (1) 中,R1 是具有 1 至 15 个碳原子的烷基;环 A1、环 A2 和环 A3 独立地是 1,4-亚苯基、2-卤代-1,4-亚苯基或 2,6-二卤代-1,4-亚苯基;Z1 和 Z2 独立地为单键或-C≡C-,但至少有一个为-C≡C-;L1 为卤素、-OCF3 或-CF3;L2 和 L3 独立地为氢或卤素,但至少有一个为卤素;以及 m 和 n 独立地为 0、1 或 2,m 和 n 之和为 1 或 2。