abstract |
The invention relates to a liquid crystalline medium based on a mixture of polar compounds with positive dielectric anisotropy, characterized in that said medium contains one or more alkenyl compounds of the formula (I) and one or more compounds of the formula (IA) wherein R, R<1>, R<2>, ring A and ring B, L<1>, L<2>; L<3>; L<4>; X, Z<1>, Z<2>, y and z have the meanings cited in Claim 1. |