Patent ID: 7732021

Claim:
Liquid-crystalline medium based on a mixture of polar compounds, comprising A) one or more compounds of formula I in which R 1 denotes a halogenated or unsubstituted alkyl or alkoxy radical having 1 to 15 C atoms, in which optionally one or more CH 2 groups are each, independently of one another, replaced by -⋄-, -⋄⋄-, —CH≡CH—, —O—, —CF 2 O—, —OCF 2 —, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, X denotes F, Cl, CN, SF 5 , SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical having up to 6 C atoms, L 1 is F, and L 2 and L 3 are H, and B) one or more compounds of formula I* in which R 1* and R 2* each, independently of one another, denote alkyl, alkoxy, oxaalkyl, fluoroalkyl, alkenyloxy or alkenyl, each having up to 9 C atoms, and r* denotes 0 or 1.