Liquid crystal medium containing polymerisable compounds

A liquid crystal (LC) medium comprising

• a polymerisable component A) which comprises
• one or more first polymerisable compounds comprising a polymerisable group and a bi- or polycyclic hydrocarbon group, and
• one or more second polymerisable compounds comprising a polymerisable group and a straight-chain, branched or monocyclic hydrocarbon group,
• optionally a photoinitiator, and
• a liquid-crystalline component B) which comprises one or more compounds selected from formula CY and PY
• wherein
• a denotes 1 or 2,
• b denotes 0 or 1,
• R1 and R2 each, independently of one another, denote alkyl having 1 to 12 C atoms, where, in addition, one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, preferably alkyl or alkoxy having 1 to 6 C atoms,
• Zx and Zy each, independently of one another, denote —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —CO—O—, —O—CO—, —C2F4—, —CF═CF—, —CH═CH—CH2O— or a single bond, preferably a single bond,
• L1-4 each, independently of one another, denote F, Cl, OCF3, CF3, CH3, CH2F, CHF2,