A liquid crystal compound represented by formula (1) and having a high elastic constant ratio, a lower viscosity than existing liquid crystal compounds, an excellent compatibility with other liquid crystal compounds particularly at low temperatures, and also a chemical stability, a liquid crystal composition comprising the same, and a liquid crystal display made by using the same (wherein R1 represents an alkyl or alkenyl group; R2 represents an alkylene group; R3 represents an alkenyl group; ring A represents a phenylene group; rings B, C, and D represent each a cyclohexylene or phenylene group; Z1 to Z3 represent each a single bond, an alkylene, -CH=CH- or the like; and n and m are each 0 or 1).
一种由式(1)表示并具有高弹性常数比、比现有液晶化合物粘度低、特别是在低温下与其他液晶化合物具有良好兼容性以及
化学稳定性的液晶化合物、由其组成的液晶组合物以及使用其制成的液晶显示器(其中R1代表烷基或烯基;R2 代表亚烷基;R3 代表烯基;环 A 代表亚苯基;环 B、C 和 D 分别代表环己基或亚苯基;Z1 至 Z3 分别代表单键、亚烷基、-CH=CH- 或类似物;以及 n 和 m 分别为 0 或 1)。