Patent ID: 7514128

Claim:
A liquid crystal composition having a negative dielectric anisotropy with an absolute value of 2.0 or more and comprising a first component comprising at least one compound selected from a group of compounds represented by formulas (1-1) and (1-2) and a second component comprising at least one compound selected from a group of compounds represented by formulas (2-1) and (2-2): wherein, independently in each formula, R 1 is alkyl having 1 to 8 carbons or alkenyl having 2 to 8 carbons; R 2 is alkyl having 1 to 8 carbons or alkoxy having 1 to 7 carbons; R 3 is alkyl having 1 to 8 carbons or alkenyl having 2 to 8 carbons; R 4 is alkyl having 1 to 8 carbons, alkenyl having 2 to 8 carbons or alkoxy having 1 to 7 carbons; Z 1 is a single bond, —C 2 H 4 — or —CH 2 O—; Z 2 is a single bond, —C 2 H 4 —, —CH 2 O— or —COO—; ring A 1 and ring A 2 are independently 1,4-cyclohexylene or 1,4-phenylene; and one of X 1 and X 2 is fluorine, and the other is chlorine.