Liquid-crystalline medium

Abstract

The invention relates to a liquid-crystalline medium having negative dielectric anisotropy on the basis of a mixture of polar compounds, which contains at least one compound selected from the group of compounds of the formulae (IA), (IB) and (IC), where R1A, R2A, R1B, R2B, R1C, R, L, m, n, o, p and b have the meanings specified in claim 1, and to its use for an active matrix display, in particular based on the ECB, PALC, FFS or IPS effect.

Description

technical field

[0001] The invention relates to a liquid-crystalline medium with negative dielectric anisotropy based on a mixture of polar compounds comprising at least one compound selected from the compounds of the formulas IA, IB and IC,

[0002]

[0003] in

[0004] R 1A , R 1B , R 2B and R 1C Each independently of each other represents an alkyl group with 2-6 C atoms,

[0005] R 2A and R 2C Each independently of the other means unsubstituted, consisting of CN or CF with not more than 6 C atoms 3 Alkyl groups which are monosubstituted or at least monosubstituted by halogen, wherein one or more CH in these groups 2 -The group can also be replaced by -O-, -S-, , -C≡C-, -CF 2 O-, -OCF 2 -, -OC-O- or -O-CO- are replaced by O atoms not directly connected to each other, and if L=F, R 2C can also represent halogen, preferably F or Cl,

[0006] L means H or F,

[0007] m, n, o and p each independently represent 0, 1 or 2,

[0008] b means 0 or 1.

[0009] Such...

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