Patent ID: 7553523
Filing Date: 2009-06-30
Classification: C09K

Abstract:
1. A liquid crystal medium comprising 1-30% by weight of one or more compounds of formula IA, 1-10% by weight of one or more compounds of formula IB, 0-9% by weight of one or more compounds of formula IC, wherein R  —CH═CH—, —C≡C—, —CO—, —CO—O—, —O—CO— or —O—CO—O— in such a way that O atoms are not linked directly to one another, Y X is F, Cl or a halogenated alkyl, alkenyl, alkoxy or alkenyloxy radical having up to 6 carbon atoms, and r is 1 or 2, and wherein the medium has a birefringence at 20° C. that is lower than 0.08, and wherein the medium does not contain a compound comprising a cyano group.