US 2010/0302498 A1 · Liquid Crystal Composition and Liquid Crystal Display Device

Abstract

Subject The invention is to provide a liquid crystal composition that satisfies at least one characteristic among characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced regarding at least two of the characteristics. The invention is to provide an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. Means for Solving the Subject A liquid crystal composition having a nematic phase and containing a specific compound having a large optical anisotropy and a large dielectric anisotropy as a first component, and a specific compound having a small viscosity as a second component, and a liquid crystal display device contains this composition.

Claims20

Dependent claims

A liquid crystal composition having a nematic phase that comprises two components, wherein the first component is at least one compound selected from the group of compounds represented by formula (1), and the second, component is at least one compound selected from the group of compounds represented by formula (2):

wherein R1 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which arbitrary hydrogen is replaced by fluorine;
R2 and R3 are each independently alkenyl having 2 to 12 carbons;
ring A and ring B are each independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene or pyrimidine-2,5-diyl;
Z1 and Z2 are each independently a single bond, ethylene, carbonyloxy or difluoromethyleneoxy;
X1, X2, X3 and X4 are each independently hydrogen or fluorine;
Y1 is fluorine, chlorine or trifluoromethoxy;
and m and j are each independently 0, 1, 2 or 3 and the sum of m and j is 2 or 3.

4 more elements

Dependencies are inferred from the claim text.

Liquid Crystal Composition and Liquid Crystal Display Device

Life of this patent

Liquid Crystal Composition and Liquid Crystal Display Device

Life of this patent

Abstract

Claims20