Patent ID: 8377520

Claim:
A liquid crystal composition having negative dielectric anisotropy and including at least one compound selected from the group of compounds represented by formula (1) as a first component, at least one compound selected from the group of compounds represented by formula (2) as a second component, and at least one compound selected from the group of compounds represented by formula (3-4) and formulae (3-8) to (3-12) as a third component: wherein R 1 is alkenyl having 2 to 12 carbons; R 2 , R 3 , R 4 and R 5 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 1,4-cyclohexylene or 1,4-phenylene; Z 1 is independently a single bond, ethylene, methyleneoxy or carbonyloxy; one of X 1 and X 2 is fluorine and the other is chlorine; and m and k are independently 1, 2 or 3.