Liquid-crystalline medium, characterised in that it comprises at least two compounds of the formula IA, and at least two compounds of the formula IB, in which R A and R B each, independently of one another, denote a halogenated or unsubstituted alkyl or alkoxy radical having 1 to 15 C atoms, where, in addition, one or more CH 2 groups in these radicals may each be replaced, independently of one another, by -C≡C-, -CF 2 O-, -CH=CH-,, -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, X A and X B each, independently of one another, denote F, Cl, CN, SF 5, SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical, in each case having up to 6 C atoms, and Y 1-13 each, independently of one another, denote H or F, with the proviso that the following media Composition Physical properties Compound T(N,I) = 88.0 °C No. Abbreviation c/% n e (20°C, 589.3 nm) = 1.6096 1 PPQU-3-F 15.0 Δn (20°C, 589.3 nm) = 0.1206 2 APUQU-2-F 3.0 ε || (20°C, 1 kHz) = 14.0 3 APUQU-3-F 11.0 Δε (20°C, 1 kHz) = 10.7 4 PGUQU-3-F 3.0 γ 1 (20°C) = 82 mPa · s 5 PGUQU-4-F 7.0 k 1 (20°C) = 14.8 pN 6 CC-3-V 34.0 k 3 (20°C) = 14.9 pN 7 CCP-V-1 11.0 V 0 (20°C) = 1.24 V 8 CCP-V2-1 10.0 9 PGP-2-3 3.0 10 PGP-2-4 3.0 Σ 100.0 Composition Physical properties Compound T(N,I) = 88.0 °C No. Abbreviation c/% n e (20°C, 589.3 nm) = 1.6129 1 PPQU-3-F 15.0 Δn (20°C, 589.3 nm) = 0.1225 2 APUQU-2-F 3.0 ε || (20°C, 1 kHz) = 13.7 3 APUQU-3-F 9.0 Δε (20°C, 1 kHz) = 10.5 4 PGUQU-3-F 3.0 γ 1 (20°C) = 82 mPa · s 5 PGUQU-4-F 7.0 k 1 (20°C) = 15.0 pN 6 PGU-3-F 2.0 k 3 (20°C) = 14.9 pN 7 CC-3-V 33.0 V 0 (20°C) = 1.25 V 8 CCP-V-1 11.0 9 CCP-V2-1 11.0 10 PGP-2-3 3.0 11 PGP-2-4 3.0 Σ 100.0 Composition Physical properties Compound T(N,I) = 89.5 °C No. Abbreviation c/% n e (20°C, 589.3 nm) = 1.6127 1 PGQU-3-F 14.0 Δn (20°C, 589.3 nm) = 0.1232 2 APUQU-2-F 3.0 ε|| (20°C, 1 kHz) = 14.4 3 APUQU-3-F 11.0 Δε (20°C, 1 kHz) = 10.9 4 PGUQU-3-F 3.0 γ 1 (20°C) = 90 mPa · s 5 PGUQU-4-F 7.0 k 1 (20°C) = 14.4 pN 6 CC-3-V 32.0 k 3 (20°C) = 15.1 pN 7 CCP-V-1 11.0 V 0 (20°C) = 1.20 V 8 CCP-V2-1 11.0 9 PGP-2-3 4.0 10 PGP-2-4 4.0 Σ 100.0 Composition Physical properties Compound T(N,I) = 88.5 °C No. Abbreviation c/% n e (20°C, 589.3 nm) = 1.6111 1 PGQU-3-F 13.5 Δn (20°C, 589.3 nm) = 0.1214 2 APUQU-2-F 3.0 ε || (20°C, 1 kHz) = 13.7 3 APUQU-3-F 10.0 Δε (20°C, 1 kHz) = 10.3 4 PGUQU-3-F 2.0 γ 1 (20°C) = 82 mPa · s 5 PGUQU-4-F 8.0 k 1 (20°C) = 14.2 pN 6 CC-3-V 33.5 k 3 (20°C) = 14.8 pN 7 CCP-V-1 11.0 V 0 (20°C) = 1.24 V 8 CCP-V2-1 11.0 9 PGP-2-3 4.0 10 PGP-2-4 4.0 Σ 100.0 Composition Physical properties Compound T(N,I) = 90.5 °C No. Abbreviation c/% n e (20°C, 589.3 nm) = 1.6104 1 GGQU-3-F 11.0 Δn (20°C, 589.3 nm) = 0.1207 2 APUQU-2-F 3.0 ε|| (20°C, 1 kHz) = 14.2 3 APUQU-3-F 9.0 Δε (20°C, 1 kHz) = 10.6 4 PGUQU-3-F 3.0 γ 1 (20°C) = 91 mPa · s 5 PGUQU-4-F 7.0 k 1 (20°C) = 13.9 pN 6 DPGU-4-F 3.0 k 3 (20°C) = 14.9 pN 7 CC-3-V 34.0 V 0 (20°C) = 1.20 V 8 CCP-V-1 11.0 9 CCP-V2-1 11.0 10 PGP-2-3 4.0 11 PGP-2-4 4.0 Σ 100.0 Composition Physical properties Compound T(N,I) = 87.5 °C No. Abbreviation c/% n e (20°C, 589.3 nm) = 1.6137 1 GGQU-3-F 10.0 Δn (20°C, 589.3 nm) = 0.1229 2 APUQU-2-F 3.0 ε|| (20°C, 1 kHz) = 14.2 3 APUQU-3-F 9.0 Δε (20°C, 1 kHz) = 10.6 4 PGUQU-3-F 3.0 γ 1 (20°C) = 90 mPa · s 5 PGUQU-4-F 8.0 k 1 (20°C) = 13.5 pN 6 PGU-3-F 4.0 k 3 (20°C) = 14.3 pN 7 CC-3-V 33.0 V 0 (20°C) = 1.19 V 8 CCP-V-1 11.0 9 CCP-V2-1 11.0 10 PGP-2-3 4.0 11 PGP-2-4 4.0 Σ 100.0 Composition Physical properties Compound T(N,I) = t.b.d. °C No. Abbreviation c/% n e (20°C, 589.3 nm) = t.b.d. 1 PPQG-3-F 11.0 Δn (20°C, 589.3 nm) = t.b.d. 2 APUQU-2-F 3.0 ε|| (20°C, 1 kHz) = t.b.d. 3 APUQU-3-F 11.0 Δε (20°C, 1 kHz) = t.b.d. 4 PGUQU-3-F 2.0 γ 1 (20°C) = t.b.d. mPa · s 5 PGUQU-4-F 5.0 k 1 (20°C) = t.b.d. pN 6 PGUQU-5-F 6.0 k 3 (20°C) = t.b.d. pN 7 PGU-3-F 4.0 V 0 (20°C) = t.b.d. V 8 CC-3-V 36.0 9 CCP-V-1 10.0 10 CCP-V2-1 8.0 11 PGP-2-3 2.0 12 PGP-2-4 2.0 Σ 100.0 in which t.b.d. denotes to be determined, and the abbreviations of the compounds denote APUQU-n-F CC-n-V CCP-V-m CCP-nV-m DPGU-n-F GGQU-n-F PGP-n-m PGQU-n-F PGU-n-F PGUQU-n-F PPQG-n-F PPQU-n-F in which n and m denote the corresponding integers in the respective formulae, are excluded. R A and R B each, independently of one another, denote a halogenated or unsubstituted alkyl or alkoxy radical having 1 to 15 C atoms, where, in addition, one or more CH 2 groups in these radicals may each be replaced, independently of one another, by -C≡C-, -CF 2 O-, -CH=CH-,, -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, X A and X B each, independently of one another, denote F, Cl, CN, SF 5, SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical, in each case having up to 6 C atoms, and Y 1-13 each, independently of one another, denote H or F,