Patent ID: 7026022

Claim:
A liquid-crystalline medium comprising: one or more compounds of formula I and one or more compounds of the formula II in which R 1 is H or alkyl having from 1 to 5 carbon atoms, R 2 is alkoxy having from 1 to 12 carbon atoms, R 3 is alkenyl having from 2 to 7 carbon atoms, R 4 is alkyl having from 1 to 12 carbon atoms, in which, in addition, one or two non-adjacent CH 2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, and c is 0 or 1; and one or more compounds of the formula III in which R 5 and R 6 are alkyl having from 1 to 12 carbon atoms, in which, in addition, one or two non-adjacent CH 2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO—, and a is 1.