Patent ID: 6846523

Claim:
A liquid-crystalline medium comprising a mixture of polar compounds of positive dielectric anisotropy, including: one or more compounds of the formula I and one or more compounds of the formulae II and/or III where R 11 is an alkyl or alkoxy radical having from 1 to 12 carbon atoms or an alkenyl radical having from 2 to 12 carbon atoms; R 12 is an alkyl or alkoxy radical having from 1 to 12 carbon atoms or an alkenyl radical having from 2 to 12 carbon atoms; R is an alkyl radical having from 1 to 12 carbon atoms, in which one or more CH 2 groups are optionally replaced by —O—, —S—, —CH═CH—, —C≡C—, —CO—, —OCO— or —COO— in such a way that the heteroatoms, —O— and/or —S— are not linked directly to one another; X 0 is F, Cl, fluoroalkyl or fluoroalkoxy having from 1 to 7 carbon atoms.