Patent ID: 7635505

Claim:
A liquid-crystalline medium based on a mixture of polar compounds, said medium one or more compounds of formula I and one or more compounds selected from the compounds of formulae IA, IB and IC in which R 1 , R 1A , R 1C and R 1C are each, independently of one another, a halogenated or unsubstituted alkyl or alkoxy radical having 1 to 15 C atoms, where, in addition, one or more CH 2 groups are each optionally replaced, independently of one another, by in such a way that O atoms are not linked directly to one another, X, X A , and X B are each, independently of one another, F, Cl, CN, SF 5 , SCN, NCS, halogenated alkyl having up to 6 C atoms, halogenated alkenyl having up to 6 C atoms, halogenated alkoxy having up to 6 C atoms, or halogenated alkenyloxy having up to 6 C atoms, a) are each independently of one another, a 1,4-cyclohexenylene or 1,4-cyclohexylene radical, in which one or two non-adjacent CH 2 groups are each optionally replaced by —O— or —S—, c) a 1,4-phenylene radical, in which one or two CH groups are each optionally replaced by N, b) piperidine-1,4-diyl, 1,4-bicyclo[2.2.2]octylene, a naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, phenanthrene-2,7-diyl, or fluorene-2,7-diyl, where the radicals a), b) and c) are each optionally mono- or polysubstituted by halogen atoms, “alkenyl” is a straight-chain alkenyl having 2 to 9 C atoms, L 1 is F, L 2 and L 3 are each H, L 4 to L 6 are each, independently of one another, H or F, and b is 0, 1 or 2.