Patent ID: 8659737

Claim:
A mesogenic medium exhibiting a blue phase, comprising two or three components selected from the following components, components A to C, in a total concentration of 85% or more to 100% or less, component A consisting of one or more compounds of formula I-T wherein L 1 is H or F, R 1 is alkyl, which is straight chain or branched, unsubstituted, mono- or poly-substituted by F, Cl or CN, and in which one or more CH 2 groups are optionally replaced, in each case independently from one another, by —O—, —S—, —NR 01 —, —SiR 01 R 02 —, —CO—, —COO—, —OCO—, —OCO—O—, —S—CO—, —CO—S—, —CY 01 ═CY 02 — or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another, Y 01 and Y 02 are, independently of each other, F, Cl or CN, and alternatively one of them may be H, R 01 and R 02 are, independently of each other, H or alkyl with 1 to 12 C-atoms, component B consisting of one or more compounds of formula I-N wherein n is 0or 1, and the other parameters have the meanings given under formula I-T, and component C consisting of one or more compounds of formula I-E wherein L 01 to L 03 are independently of one another H or F, R 0 is alkyl, which is straight chain or branched, is unsubstituted, mono- or poly-substituted by F, Cl or CN, and in which one or more CH 2 groups are optionally replaced, in each case independently from one another, by —O—, —S—, —NR 01 —, —SiR 01 R 02 —, —CO—, —COO—, —OCO—, —OCO—O—, —S—CO—, —CO—S—, —CY 01 ═CY 02 — or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another, Y 01 and Y 02 are, independently of each other, F, Cl or CN, and alternatively one of them may be H, R 01 and R 02 are, independently of each other, H or alkyl with 1 to 12 C-atoms.