Liquid crystal composition and liquid crystal display device

摘要

A liquid crystal composition and an AM LCD device including the same are described. The liquid crystal composition has a negative dielectric anisotropy, contains a specific compound having a large negative dielectric anisotropy as a first component, and may further contain a specific compound having high a maximum temperature or a small viscosity as a second component, a specific compound having a negative dielectric anisotropy as a third component, and/or a specific compound having a polymerizable group as an additive component.

主权项

1. A liquid crystal composition that has a negative dielectric anisotropy, and contains at least one compound selected from the group consisting of compounds represented by formula (1) as a first component: wherein in formula (1), R1 and R2 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring A and ring B are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, or 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine; Z1and Z2 are independently a single bond, ethylene or carbonyloxy; X1 and X2 are independently hydrogen or fluorine; a is 0, 1, 2 or 3; b is 0 or 1; and a sum of a and b is 3 or less.