Liquid crystal medium and liquid crystal display

摘要

The instant invention relates to mesogenic media exhibiting a blue phase, comprising one, two or more compounds of formula I-A;
wherein the parameters are as specified in the text, preferably stabilised by a polymer, and their use in electro-optical light modulation elements and their respective use in displays, as well as to such displays.

主权项

1. Mesogenic medium exhibiting a blue phase, comprising at least one compound of formula I-A wherein R1 is alkyl with 1 to 9 C-atoms, which is straight chain or branched, unsubstituted, mono- or poly-substituted by F, Cl or CN, and in which one or more CH2 groups are optionally replaced, in each case independently from one another, by —O—, —S—, —NR01—, —SiR01R02—, —CO—, —COO—, —OCO—, —OCO—O—, —S—CO—, —CO—S—, —CY01═CY02— or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another, L11 and L12 are, independently of each other, H or F, Y01 and Y02 are, independently of each other, F, Cl or CN, and alternatively one of them may be H, and R01 and R02 are, independently of each other, H or alkyl with 1 to 12 C-atoms.