Electrooptical liquid crystal display
AssigneeMerck Patent GmbH
InventorsMichael Heckmeier, Eike Poetsch
Life of this patent
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Abstract
The invention relates to an electrooptical liquid crystal display comprising a reorientation layer for reorientation of the liquid crystals. The field of said reorientation layer has a component parallel to the liquid crystal layer, said component being crucial for the reorientation. Said component comprises a liquid-crystalline medium having a positive dielectric anisotropy and contains at least one mesogenic compound of the formula (I), wherein R1 and L are delined as in claim 1.
Claims34
An electro-optical liquid-crystal display having a realignment layer for realignment of the liquid crystals whose field has a component parallel to the liquid-crystal layer that is crucial for the realignment, containing a liquid-crystalline medium of positive dielectric anisotropy, wherein said the medium comprises one or more compounds of formula I
- in which
- R1 is an alkyl or alkenyl radical having up to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen and in which, in addition, one or more CH2 groups in these radicals may each, independently of one another, be replaced by —O—, —S—,
- —CO—, —CO—O—, —O—CO— or —O—CO—O— in such a way that O atoms are not linked directly to one another, and
- L is H or F.
A liquid-crystalline medium of positive dielectric anisotropy comprising two or more liquid-crystalline compounds wherein said medium contains at least one compound according to formula I
- in which
- R1 is an alkyl or alkenyl radical having up to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen and in which, in addition, one or more CH2 groups in these radicals may each, independently of one another, be replaced by —O—, —S—,
- —CO—, —CO—O—, —O—CO— or —O—CO—O— in such a way that O atoms are not linked directly to one another, and
- L is H or F.
Dependencies are inferred from the claim text.