Patent ID: 7445818
Filing Date: 2008-11-04
Classification: C09K

Abstract:
1. A matrix liquid crystal display comprising: two plane parallel support plates which together with a frame form a cell, integrated non-linear elements for switching individual picture elements on the support plates and a nematic liquid crystal mixture which is present in the cell and has a positive dielectric anisotropy and high resistivity, wherein the liquid crystal mixture is based on the following components: a) at least 10% by weight of a liquid-crystalline component B comprising one or more compounds of the following formulae ha to IIa to IIf: in which R is n-alkyl or n-alkenyl of up to 9 carbon atoms, X is F, Cl, CF the rings A 1 , A 2 and A 3 are each, independently of one another, 1,4-phenylene, 2- or 3-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, trans-1,4-cyclohexylene or 1,4-cyclohexenylene, and b) up to 90% by weight of a liquid-crystalline component A comprising one or more compounds having a dielectric anisotropy of −1.5 to 1.5 of the formula I wherein R the rings A Z m is 0, 1 or 2, and wherein the nematic liquid crystal mixture has a nematic phase range of at least 60° C., a maximum viscosity at 20° C. of 30 mPa·s and a mean dielectricity constant ∈≦8; provided that the liquid crystal mixture does not contain any significant amount of compounds of the formula wherein each R′ is independently alkyl.