Patent ID: 7579053

Claim:
A liquid crystal medium, comprising: a dielectrically neutral component, component A, comprising a dielectrically neutral compound of formula I a dielectrically positive component, component B, comprising one or more dielectrically positive compounds having a dielectric anisotropy of more than 3, which includes one or more compounds selected from the group of compounds of formulae II-1a to II-1e: wherein R 2 is alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms, L 21 to L 24 , are, independently of each other, H or F, and X 2 is halogen, halogenated alkyl or halogenated alkoxy with 1 to 3 C-atoms or halogenated alkenyl or halogenated alkenyloxy with 2 or 3 C-atoms; and; one or more compounds of formula VI: wherein R 61 and R 62 , are, independently of each other, alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms, and in case it is occurring twice in each occurrence independently of each other, is Z 61 and Z 62 are, independently of each other, and in case Z 61 is present twice, also these independently of each other, —CH 2 CH 2 —, —COO—, trans- —CH═CH—, trans- —CF═CF—, —CH 2 O—, —CF 2 O— or a single bond, and r is 0, 1 or 2; wherein the concentration of the component A in the medium is from 30% to 65% by weight of the total medium.