Liquid crystal four-ring compound having fluorine, liquid crystal composition, and liquid crystal display device
申请人:JNC Corporation
公开号:US08137583B2
公开(公告)日:2012-03-20
The invention provides a liquid crystal compound having stability to heat, light and so forth, a wide temperature range of the nematic phase, a small viscosity, a suitable optical anisotropy, a suitable dielectric anisotropy and an excellent compatibility with other liquid crystal compounds. The invention also provides a liquid crystal composition containing this liquid crystal compound and a liquid crystal display device containing this liquid crystal composition.
The compound is represented by formula (a).
Ra is, for example, alkyl having 1 to 10 carbons, and Rb is, for example, alkenyl having 2 to 10 carbons; La is, for example, hydrogen; and Z1, Z2 and Z3 are, for example, a single bond. The liquid crystal composition comprises this compound. The liquid crystal display device comprises this liquid crystal composition.
本发明提供了一种液晶化合物,具有热稳定性、光稳定性等特点,具有宽广的向列相温度范围、较小的粘度、适当的光学各向异性、适当的介电各向异性,以及与其他液晶化合物的优异相容性。本发明还提供了一种含有该液晶化合物的液晶组合物和一种包含该液晶组合物的液晶显示装置。该化合物由式(a)表示。其中,Ra是例如具有1到10个碳的烷基,而Rb是例如具有2到10个碳的烯基;La是例如氢;而Z1、Z2和Z3是例如单键。该液晶组合物包含该化合物。该液晶显示装置包含该液晶组合物。