Liquid-crystalline medium

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
• R1A and R1B each, independently of one another, denote an alkenyl radical having up to 6 C atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, in which optionally, one or more CH2 groups are, each independently of one another, replaced by —O—, —S—,
• —C≡C—, —CF2O—, —OCF2—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another,
• R2A, R2B, R1C, R1D and R2D each, independently of one another, denote an alkyl or alkenyl radical having up to 6 C atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, in which optionally, one or more CH2 groups are, each independently of one another, replaced by —O—, —S—,
• —C≡C—, —CF2O—, —OCF2—, —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
• Y1, Y2, Y4 and Y5 each, independently of one another, denote F, Cl, CF3, CHF2, CH2F, OCF3, OCH2F, OCHF2 or CN,
• Y3 denotes H or CH3,
• R2C denotes H or F,
• R3C denotes H, CH3, C2H5 or n-C3H7,
• 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
• R13-R20 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
• R1C denotes an alkyl or alkenyl radical having up to 6 C atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, in which optionally, one or more CH2 groups are, each independently of one another, replaced by —O—, —S—,
• —C≡C—, —CF2O—, —OCF2—, —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
• R1D and R2D each, independently of one another, denote an alkyl or alkenyl radical having up to 6 C atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, in which optionally, one or more CH2 groups are, each independently of one another, replaced by —O—, —S—,
• —C≡C—, —CF2O—, —OCF2—, —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.