Patent ID: 7153550

Claim:
A liquid crystal medium, comprising a dielectrically positive component A, which comprises one or more compounds of formula I and one or more compounds of formula II wherein R 1 and R 2 are, each independently, 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, X 1 is F, Cl or fluorinated alkyl or fluorinated alkoxy, each with 1 to 4 C-atoms, independently of each other, are Z 11 and Z 12 are each a single bond, L 11 is F, L 12 is H or F, Z 2 is —CH 2 —CH 2 —, —CF 2 —CF 2 —, —CF 2 —O—, —O—CF 2 —, —CH 2 —O—, —O—CH 2 —, —CO—O— or a single bond, and X 2 is F, Cl or fluorinated alkyl or fluorinated alkoxy each with 1 to 4 C-atoms, wherein a compound of formula II-1d is present in the medium wherein R 2 is as defined above, and at a concentration of 29.5% or more of one or more compounds of formula III wherein R 3 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, is Z 31 and Z 32 are, independently of each other, —CH 2 —CH 2 —, —CF 2 —CF 2 —, —CF 2 —O—, —O—CF 2 , —CH 2 —O—, —O—OH 2 —, —CO—O— or a single bond, and L 31 and L 32 are, independently of each other, H or F.