Patent ID: 8182717

Claim:
A liquid crystal composition having a negative dielectric anisotropy, comprising: a first component which is at least one compound selected from the group of compounds represented by formula (1); a second component which is at least one compound selected from the group of compounds represented by formula (2); and a third component which is at least one compound selected from the group of compounds represented by formula (3): wherein R 1 , R 2 , R 4 , R 5 and R 6 are each 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; R 3 is alkenyl having 2 to 12 carbons; ring A, ring B and ring C are each independently 1,4-cyclohexylene or 1,4-phenylene; ring D and ring E are each independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, or 2,5-difluoro-1,4-phenylene; Z 1 and Z 2 are each independently a single bond, ethylene, methyleneoxy or carbonyloxy; and m and n are each independently 1, 2 or 3; p and q are each independently 0, 1, 2 or 3; and the sum of p and q is 3 or less.