Liquid crystal composition and liquid crystal display device
AssigneesJnc Corporation, Jnc Petrochemical Corporation
InventorMasayuki Saito
Life of this patent
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Abstract
A liquid crystal composition satisfies at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy, large dielectric anisotropy and high stability to ultraviolet light, or having a suitable balance regarding at least two of the characteristics. The liquid crystal composition contains a quencher as an additive, and may contain a specific compound having large positive dielectric anisotropy as a first component, a specific compound having high maximum temperature or small viscosity as a second component, or a specific compound having large negative dielectric anisotropy as a third component.
Claims14
A liquid crystal composition that contains a compound represented by formula (1) as an additive, at least one compound represented by formula (2) as a first component, and has a nematic phase and positive dielectric anisotropy:
- wherein, in formula (2), R1 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons;
- ring A is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl or tetrahydropyran-2,5-diyl;
- Z1 is a single bond, ethylene, carbonyloxy or difluoromethyleneoxy;
- X1 and X2 are independently hydrogen or fluorine;
- Y1 is fluorine, chlorine, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, alkoxy having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, or alkenyloxy having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine;
- and a is 1, 2, 3 or 4.
Dependencies are inferred from the claim text.