Patent ID: 6929832
Filing Date: 2005-08-16
Classification: C07C,C09K

Abstract:
1. A nematic liquid-crystal medium, comprising a) one or more dielectrically positive compound(s) of the formula I in which R Z are each, independently of one another, X is F, or OCF n and m are each, independently of one another, 0 or 1; b) one or more dielectrically negative compound(s) of the formula II in which R Z are each, independently of one another, L 1 is 0 or 1; and optionally c) one or more dielectrically neutral compound(s) of the formula III in which R Z are each, independently of one another, o and p, independently of one another, are 0 or 1, wherein the medium has a positive dielectric anisotropy of 3.2 or more, a birefringence, Δn, of less than or equal to 0.11, and the ratio of the dielectric anisotropies of the liquid-crystal medium parallel and perpendicular to the director is less than or equal to 1.93.