Liquid crystal composition and liquid crystal display device
AssigneesChisso Corporation, Chisso Petrochemical Corporation
InventorHiroaki Fujita
Life of this patent
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Abstract
The invention relates to a liquid crystal composition that satisfies at least one characteristic among the characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity or a small rotation viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light, a high stability to heat and so forth, and 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.
Claims24
A liquid crystal composition having a nematic phase comprising a first component that is at least one compound selected from the group of compounds represented by formula (1-1) and formula (1-2), a second component that is at least one compound selected from the group of compounds represented by formula (2-1) and (2-2), and a third compounds represented by formula (3):
- wherein R1 is independently alkyl having 1 to 12 carbons, R2 is independently alkyl having 1 to 12 carbons or alkenyl having 2 to 12 carbons;
- R3 is independently alkyl having 1 to 12 carbons;
- R4 is independently alkyl having 1 to 12 carbons;
- alkoxy having from 1 to 12 carbons, alkenyl having 2 to 12 carbons or alkenyl having 2 to 12 carbons, arbitrary hydrogen of which is replaced by fluorine;
- Ring A is independently 1,4-phenylene,3-fluoro-1,4-phenylene, or 3,5-difluoro-1,4-phenylene;
- X1, X2, X3, X4, X5 and X6 are each independently hydrogen or fluorine;
- Y1 and Y2 are fluorine, chroline or trifluorometoxy;
- n is 1 or 2.
Dependencies are inferred from the claim text.