Patent ID: 8394467

Claim:
A liquid crystal medium, comprising one or more compounds of formula I wherein R 1 is alkyl or alkoxy with 1 to 7 C-atoms or alkenyl, alkenyloxy or alkoxyalkyl with 2 to 7 C-atoms L 11 and L 12 are independently of each other H or F and X 1 is CN or NCS, and one or more compounds of formula II and one or more compounds of formula III wherein R 21 , R 22 , R 31 and R 32 , independently of each other, are alkyl or alkoxy with 1 to 7 C-atoms, alkenyl, alkenyloxy or alkoxyalkyl with 2 to 7 C-atoms, and m and n are, independently of each other, 0 or 1, and optionally one or more compounds of formulae IV and V wherein R 41 , R 42 , R 51 and R 52 independently of each other, are alkyl or alkoxy with 1 to 7 C-atoms, alkenyl, alkenyloxy or alkoxyalkyl with 2 to 7 C-atoms, independently of each other and in case is present twice, also these independently of each other are independently of each other and in case is present twice, also these independently of each other are Z 41 , Z 42 , Z 51 and Z 52 independently of each other, and in case Z 41 and/or Z 51 is/are present twice, also these independently of each other, are —CH 2 CH 2 —, —COO—, trans- —CH═CH—, trans- —CF═CF—, —CH 2 O—, —CF 2 O—, —C≡C— or a single bond, and p and q are, independently of each other, 0, 1 or 2, and optionally one or more chiral compounds, wherein Δ∈ is 1.0 or more and 10 or less.