Patent ID: 8916063

Claim:
A liquid crystal composition that has a negative dielectric anisotropy and contains 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 is F CH 2 u wherein u is an integer from 1 to 12; R 2 , R 3 and R 4 are independently alkyl having 1 to 12 carbons or alkenyl having 2 to 12 carbons, and in the alkyl or the alkenyl, at least one hydrogen may be replaced by halogen and at least one methylene may be replaced by oxygen; ring A and ring B are independently in the rings, at least one hydrogen may be replaced by halogen; X 1 and X 2 are independently fluorine or chlorine; Y 1 is hydrogen or methyl; Z 1 and Z 2 are independently a single bond, ethylene, methyleneoxy or carbonyloxy; and m and n are independently 0, 1, 2 or 3, and a sum of m and n is 1, 2 or 3.