Patent ID: 8906261

Claim:
An LC medium comprising one or more compounds of the formula I and having a content of 25% by weight or more of the one or more compounds of the formula I: in which the individual radicals have the following meanings: R 1 and R 2 denote H, F, Cl, Br, —CN, —SCN, —NCS, SF 5 or straight-chain or branched alkyl having 1 to 12 C atoms, in which, in addition, one or more non-adjacent CH 2 groups may each be replaced, independently of one another, by —CH═CH—, —C≡C—, —O—, —CO—, —CO—O—, —O—CO—, —O—CO—O— in such a way that O atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by F, Cl or Br, A 0 denotes A 1 , independently of one another, denotes phenylene-1,4-diyl, in which, in addition, one or two CH groups may be replaced by N and one or more H atoms may be replaced by halogen, CN, CH 3 , CHF 2 , CH 2 F, OCH 3 , OCHF 2 or OCF 3 , cyclohexane-1,4-diyl, in which, in addition, one or two non-adjacent CH 2 groups may be replaced, independently of one another, by O and/or S and one or more H atoms may be replaced by F, cyclohexene-1,4-diyl, bicyclo[1.1.1]pentane-1,3-diyl, bicyclo[2.2.2]octane-1,4-diyl, spiro[3.3]heptane-2,6-diyl, tetrahydropyran-2,5-diyl or 1,3-dioxane-2,5-diyl, m in each case, independently of one another, denotes 0, 1 or 2.