Mesogenic medium comprising a first component, component A, consisting of bimesogenic compounds selected from the group of compounds of formulae A-I to A-III wherein R 11 and R 12, R 21 and R 22 and R 31 and R 32 are each independently H, F, Cl, CN, NCS or a straight-chain or branched alkyl group with 1 to 25 C atoms which may be unsubstituted, mono- or polysubstituted by halogen or CN, it being also possible for one or more non-adjacent CH 2 groups to be replaced, in each occurrence independently from one another, by -O-, -S-, -NH-, -N(CH 3)-, -CO-, -COO-, -OCO-, -O-CO-O-, -S-CO-, -CO-S-, -CH=CH-, -CH=CF-, -CF=CF- or -C≡C- in such a manner that oxygen atoms are not linked directly to one another, MG 11 and MG 12, MG 21 and MG 22 and MG 31 and MG 32 are each independently a mesogenic group, Sp 1, Sp 2 and Sp 3 are each independently a spacer group comprising 5 to 40 C atoms, wherein one or more non-adjacent CH 2 groups, with the exception of the CH 2 groups of Sp 1 linked to O-MG 11 and/or O-MG 12, of Sp 2 linked to MG 21 and/or MG 22 and of Sp 3 linked to X 31 and X 32, may also be replaced by -O-, -S-, -NH-, -N(CH 3)-, -CO-, -O-CO-, -S-CO-, -O-COO-, -CO-S-, -CO-O-, -CH(halogen)-, -CH -, -CH=CH- or -C≡C-, however in such a way that (in the molecules) no two O-atoms are adjacent to one another, no two -CH=CH- groups are adjacent to each other, and no two groups selected from -O-CO-, -S-CO-, -O-COO-, -CO-S-, -CO-O- and -CH=CH- are adjacent to each other and X 31 and X 32 are independently from one another a linking group selected from -CO-O-, -O-CO-, -CH=CH-, -C≡C- or -S-, and, alternatively, one of them may also be either -O- or a single bond, and, again alternatively, one of them may be -O- and the other one a single bond, a second component, component B, consisting of nematogenic compounds, preferably selected from the group of compounds of formulae B-I to B-III wherein R B1, R B21 and R B22 and R B31 and R B32 are each independently H, F, Cl, CN, NCS or a straight-chain or branched alkyl group with 1 to 25 C atoms which may be unsubstituted, mono- or polysubstituted by halogen or CN, it being also possible for one or more non-adjacent CH 2 groups to be replaced, in each occurrence independently from one another, by -O-, -S-, -NH-, -N(CH 3)-, -CO-, -COO-, -OCO-, -O-CO-O-, -S-CO-, -CO-S-, -CH=CH-, -CH=CF-, -CF=CF- or -C≡C- in such a manner that oxygen atoms are not linked directly to one another, X B1 is F, Cl, CN, NCS, preferably CN, L B11 to L B32 are independently H or F Z B1, Z B2 and Z B3 are in each occurrence independently -CH 2 -CH 2 -, -CO-O-, -O-CO-, -CF 2 -O-, -O- CF 2 -, -CH=CH- or a single bond, and are in each occurrence independently alternatively one or more of are and n is 1, 2 or 3, and a third component, component C, consisting of one or more chiral molecules, characterized in that it comprises one or more compounds of formula A-III, wherein at least one of X 31 and X 32 is a linking group selected from -CO-O- and -O-CO-. R 11 and R 12, R 21 and R 22 and R 31 and R 32 are each independently H, F, Cl, CN, NCS or a straight-chain or branched alkyl group with 1 to 25 C atoms which may be unsubstituted, mono- or polysubstituted by halogen or CN, it being also possible for one or more non-adjacent CH 2 groups to be replaced, in each occurrence independently from one another, by -O-, -S-, -NH-, -N(CH 3)-, -CO-, -COO-, -OCO-, -O-CO-O-, -S-CO-, -CO-S-, -CH=CH-, -CH=CF-, -CF=CF- or -C≡C- in such a manner that oxygen atoms are not linked directly to one another, MG 11 and MG 12, MG 21 and MG 22 and MG 31 and MG 32 are each independently a mesogenic group, Sp 1, Sp 2 and Sp 3 are each independently a spacer group comprising 5 to 40 C atoms, wherein one or more non-adjacent CH 2 groups, with the exception of the CH 2 groups of Sp 1 linked to O-MG 11 and/or O-MG 12, of Sp 2 linked to MG 21 and/or MG 22 and of Sp 3 linked to X 31 and X 32, may also be replaced by -O-, -S-, -NH-, -N(CH 3)-, -CO-, -O-CO-, -S-CO-, -O-COO-, -CO-S-, -CO-O-, -CH(halogen)-, -CH -, -CH=CH- or -C≡C-, however in such a way that (in the molecules) no two O-atoms are adjacent to one another, no two -CH=CH- groups are adjacent to each other, and no two groups selected from -O-CO-, -S-CO-, -O-COO-, -CO-S-, -CO-O- and -CH=CH- are adjacent to each other and X 31 and X 32 are independently from one another a linking group selected from -CO-O-, -O-CO-, -CH=CH-, -C≡C- or -S-, and, alternatively, one of them may also be either -O- or a single bond, and, again alternatively, one of them may be -O- and the other one a single bond, R B1, R B21 and R B22 and R B31 and R B32 are each independently H, F, Cl, CN, NCS or a straight-chain or branched alkyl group with 1 to 25 C atoms which may be unsubstituted, mono- or polysubstituted by halogen or CN, it being also possible for one or more non-adjacent CH 2 groups to be replaced, in each occurrence independently from one another, by -O-, -S-, -NH-, -N(CH 3)-, -CO-, -COO-, -OCO-, -O-CO-O-, -S-CO-, -CO-S-, -CH=CH-, -CH=CF-, -CF=CF- or -C≡C- in such a manner that oxygen atoms are not linked directly to one another, X B1 is F, Cl, CN, NCS, preferably CN, L B11 to L B32 are independently H or F Z B1, Z B2 and Z B3 are in each occurrence independently -CH 2 -CH 2 -, -CO-O-, -O-CO-, -CF 2 -O-, -O- CF 2 -, -CH=CH- or a single bond, n is 1, 2 or 3, X 31 and X 32 is a linking group selected from -CO-O- and -O-CO-.