CHIRAL SMECTIC LIQUID CRYSTAL MIXTURE

摘要

A chiral smectic liquid crystal mixture having a spontaneous polarisation of < 20 NC/CM<2>, comprises at least 1 compound from each of the groups A (consisting of Aa and Ab) and B of achiral materials and C of chiral materials wherein in compound Aa one of A<1>/A<2> is pyrimidine-2,5-diyl or pyridine-2,5-diyl; and in compound Ab one of A<1>/A<2> is pyrimidine-2,5-diyi or pyridine-2,5-diyl, the other is phenylene-1,4-diyl or cyclohexane-1,4-diyl; and the other variables are as defined in the claims.