Patent ID: 8236390

Claim:
A liquid-crystalline medium based on a mixture of polar compounds, comprising one or more compounds of formula I and one or more compounds of formulae ST, XIIb, IVb-1, IVb-2, VIIIm, IXd and/or D4 in which R 1 denotes a halogenated or unsubstituted alkyl or alkoxy radical having 1 to 15 C atoms, in which one or more CH 2 groups may each be replaced, independently of one another, by —C≡C—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, X 1 in each case, independently of one another, denotes F, Cl, CN, SF 5 , NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical having up to 6 C atoms, and L 1 to L 5 each, independently of one another, denote H or F, in which R 0 denotes n-alkyl, alkylalkoxy, alkoxy, alkenyloxy, fluoroalkyl or alkenyl, each having up to 9 C atoms, X 0 denotes F, Cl, halogenated alkyl, halogenated alkenyl, halogenated alkenyloxy or halogenated alkoxy having up to 6 C atoms, and s is 1 or 2, in which R 0 has the definition from above as for the compound of ST, alkyl denotes a straight-chain alkyl radical having 1-7 C atoms, and alkenyl denotes a straight-chain alkenyl radical having 2-7 C atoms, with the provisos that, aside from the compounds of Formula I, the liquid-crystalline medium comprises no further compounds having a CF 2 O bridge group connecting ring groups, and no further compounds containing a pyran ring.