abstract |
The invention relates to a liquid crystalline medium based on a mixture of polar compounds with a positive dielectric anisotropy which contains one or more compounds of the general formula (I) in which: L is H or F; X is F, C1, CF3, OCF3 or OCHF2 and R is alkyl, oxa-alkyl, fluoroalkyl or alkenyl with up to 7 c atoms. |