Patent ID: 7785677

Claim:
A liquid-crystalline medium comprising a mixture of polar compounds, containing at least one compound of Formula I in which R 11 and R 12 each, independently of one another, denote an alkyl or alkenyl radical having up to 15 C atoms which is unsubstituted, where, in addition, one or more CH 2 groups in these radicals may be replaced by —O—, —S—, , —C≡C—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, with the proviso that at least one of the radicals R 11 and R 12 denotes alkenyl having 2 to 6 C atoms, and Z 1 denotes —CH═CH— or a single bond, and one or more compounds of Formula IIA and/or IIB: R 2 denotes an alkyl or alkenyl radical having up to 15 C atoms which is unsubstituted, monosubstituted by CN or CF 3 or at least monosubstituted by halogen, where, in addition, one or more CH 2 groups in these radicals may be replaced by —O—, —S—, —C≡C—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, Z 2 denotes a single bond, —CH═CH— or —CH 2 CH 2 —, p denotes 1 or 2, and L 1 and L 2 each, independently of one another, denote F, Cl, OCF 3 , CF 3 , CH 3 , CH 2 F, CHF 2 , and v denotes 1 to 6.