Patent ID: 8496850

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 3 and R 4 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; X 1 , X 2 , X 3 and X 4 are independently hydrogen, fluorine or chlorine, and at least three of them are fluorine; the ring A and the ring B are independently 1,4-cyclohexylene, 1,4-phenylene or 3-fluoro-1,4-phenylene; Z 1 is independently a single bond, ethylene, methyleneoxy or carbonyloxy; and m is 1, 2 or 3.