| 摘要 |
Liquid crystal medium based on a mixture of polar compounds with positive or negative dielectric anisotropy comprises one or more 2-fluoro-1,4-diphenylbenzene derivatives (I). - Liquid crystal medium based on a mixture of polar compounds with positive or negative dielectric anisotropy comprises one or more 2-fluoro-1,4-diphenylbenzene derivatives of formula (I): - R1, R2 = H or 1-12C alkyl, where alkyl is optionally monosubstituted with CN or CF3 or mono- or poly-substituted with halogen and optionally has one or more CH2 groups replaced by O, S, 1,3-cyclobutylene, CH=CH, ethynylene, CO, COO, OCO or OCOO. - An INDEPENDENT CLAIM is also included for electrooptic display devices comprising a liquid crystal medium as above |
