Patent ID: 8808814

Claim:
A liquid crystal composition having negative dielectric anisotropy and comprising 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) as a third component: wherein R 3 , R 4 , R 5 and R 6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; the ring A is 1,4-cyclohexylene or 1,4-phenylene; X 1 and X 2 are independently fluorine or chlorine; Z 1 is independently a single bond, ethylene or methyleneoxy; Z 2 is a single bond or ethylene; and k is 2 or 3.