Liquid-crystalline medium
AssigneeMerck Patent GmbH
InventorsKazuaki Tarumi, Matthias Bremer
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Abstract
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, which contains at least 1 compound of the formula I ##STR1## in which R.sup.1 and R.sup.2 are each, independently of one another, H, an unsubstituted alkyl or alkenyl radical having up to 18 carbon atoms in which one or more non-adjacent CH.sub.2 groups may be replaced by a radical selected from the group consisting of --O--, --S--, and --C.tbd.C--, and the use thereof for active matrix displays based on the ECB effect.
Claims14
Liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, having a birefringence between 0.04 and 0.10, comprising at least 1 compound of the formula I ##STR28## with a total of 4 or more compounds selected from formulae I and II ##STR29## and a total of two or more compounds of formula III ##STR30## in which R.sup.1 and R.sup.2 are each, independently of one another, H, an unsubstituted alkyl or alkenyl radical having up to 18 carbon atoms in
- which one or more non-adjacent CH.sub.2 groups may be replaced by a radical
- selected from the group consisting of --O--, --S-- and --C.tbd.C--.
Dependencies are inferred from the claim text.