LIQUID CRYSTAL MEDIUM, OPTICAL DEVICE AND LIQUID CRYSTAL COMPOUND

摘要

A liquid crystal medium that has stability to heat, light and so forth, a wide temperature range of a liquid crystal phase and significantly large dielectric anisotropy to develop an optically isotropic liquid crystal phase is required. Moreover, various optical devices that can be used in a wide temperature range, and have a short response time, a large contrast ratio and a low drive voltage are required.;A liquid crystal composition contains an achiral component T containing at least one compound (1) represented by formula (1) and a chiral agent to develop an optically isotropic liquid crystal phase:;;(wherein, in formula (1), R1 is alkyl having 1 to 12 carbons, L1, L2 and L3 are each independently hydrogen, fluorine or chlorine; and Y1 is fluorine, for example).

主权项

1. A liquid crystal composition that contains an achiral component T containing at least one compound (1) represented by formula (1) and a chiral agent to develop an optically isotropic liquid crystal phase: (wherein, in formula (1), R1 is hydrogen, alkyl having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkynyl having 2 to 12 carbons or alkoxy having 1 to 11 carbons; L1, L2 and L3 are each independently hydrogen, fluorine or chlorine; and Y1 is fluorine, chlorine, —CF3 or —OCF3).