Liquid Crystal Medium

A liquid crystal medium comprising one or more compounds of formula I:

• in which
• R11 and R12 identically or differently, denote H, a straight-chain alkyl or alkoxy group having 1 to 15 C atoms, a straight-chain alkenyl or alkenyloxy group having 2 to 15 C atoms, or a branched alkyl, alkoxy, alkenyl, or alkenyloxy group having 3 to 15 C atoms, wherein one or more CH2 groups are optionally replaced, independently of one another, by
• —CH═CH—, —C≡C—, —CF2O—, —OCF2—, —O—, —CO—O—, or —O—CO— in such a way that 0 atoms are not linked directly to one another, and in which one or more H atoms are optionally replaced by halogen;
• and
• L11, L12, L13, and L14 identically or differently, denote H, F, Cl, CH3, CF3, or CHF2, wherein at least one of L11, L12, L13, or L1 denotes F, Cl, CH3, CF3, or CHF2.
• wherein the liquid crystal medium has positive dielectric anisotropy.