Patent ID: 8273421

Claim:
A liquid crystal composition that has negative dielectric anisotropy and includes at least one compound selected from the group of compounds represented by formula (1) as a first component and at least one compound selected from the group of compounds represented by formula (2) as a second component: wherein R 1 and R 2 are independently 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; the ring A is independently tertahydropyran-2,5-diyl, 1,4-cyclohexylene or 1,4-phenylene, and at least one of the rings A is tertahydropyran-2,5-diyl; Z 1 is independently a single bond, ethylene, methyleneoxy or carbonyloxy; one of X 1 and X 2 is hydrogen and the other is fluorine; and m is 1, 2 or 3.