Mesogenic compound, liquid-crystal medium and liquid crystal display
AssigneeMerck Patent GmbH
InventorsMichael WITTEK, Matthias BREMER, Andreas TAUGERBECK
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Abstract
The instant invention relates to mesogenic compounds of formula I-Z to mesogenic media, preferably exhibiting a blue phase, comprising a component, component A, consisting of one or more compounds of formula I-Z, and, preferably, a second component, component B, consisting of one or more compounds selected from the group of compounds of formulae I-M and I-U, 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.
Claims16
Mesogenic compound of formula I-Z
- 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,
- L1 is H or F,
- X1 is F, CN or CF3,
- 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.
Mesogenic medium exhibiting a blue phase, comprising a component A,
- consisting of one or more compounds of formula I-Z
- 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,
- L1 is H or F,
- X1 is F, CN or CF3,
- 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.
Dependencies are inferred from the claim text.