Patent ID: 8475889

Claim:
A liquid-crystalline medium, comprising at least one compound of formula IA and at least one compound of formulae IB, IC and/or ID in which R 1A and R 1B each, independently of one another, denote an alkenyl radical having up to 6 C atoms which is unsubstituted, monosubstituted by CN or CF 3 or at least monosubstituted by halogen, in which optionally, one or more CH 2 groups are, each independently of one another, replaced by —O—, —S—, —C≡C—, —CF 2 O—, —OCF 2 —, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, R 2A , R 2B , R 1C , R 1D and R 2D each, independently of one another, denote an alkyl or alkenyl radical having up to 6 C atoms which is unsubstituted, monosubstituted by CN or CF 3 or at least monosubstituted by halogen, in which optionally, one or more CH 2 groups are, each independently of one another, replaced by —O—, —S—, —C≡C—, —CF 2 O—, —OCF 2 —, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, each, independently of one another, denote Y 1 , Y 2 , Y 4 and Y 5 each, independently of one another, denote F, Cl, CF 3 , CHF 2 , CH 2 F, OCF 3 , OCH 2 F, OCHF 2 or CN, Y 3 denotes H or CH 3 , R 2C denotes H or F, R 3C denotes H, CH 3 , C 2 H 5 or n-C 3 H 7 , a and b each, independently of one another, denote 0, 1 or 2, where a+b is >1, c denotes 1 or 2, and d denotes 0 or 1, and at least one compound of formulae Y-1 to Y-8 in which R 13 -R 20 each, independently of one another, denote an alkyl or alkoxy radical having 1-6 C atoms, and z and m each, independently of one another, denote 1-6, and satisfies at least one of the conditions I), II) or III), wherein condition I) is that the liquid-crystalline medium comprises at least one compound of formulae IC-1 to IC-16 in which R 1C denotes an alkyl or alkenyl radical having up to 6 C atoms which is unsubstituted, monosubstituted by CN or CF 3 or at least monosubstituted by halogen, in which optionally, one or more CH 2 groups are, each independently of one another, replaced by —O—, —S—, —C≡C—, —CF 2 O—, —OCF 2 —, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, condition II) is that the liquid-crystalline medium comprises at least one compound of formulae ID-1 to ID-6 in which R 1D and R 2D each, independently of one another, denote an alkyl or alkenyl radical having up to 6 C atoms which is unsubstituted, monosubstituted by CN or CF 3 or at least monosubstituted by halogen, in which optionally, one or more CH 2 groups are, each independently of one another, replaced by —O—, —S—, —C≡C—, —CF 2 O—, —OCF 2 —, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and condition III) is that the liquid-crystalline medium comprises a compound of formula Y-6.