Patent ID: 8211332

Claim:
A liquid crystal composition that comprises 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 , R 2 , R 3 and R 4 are each independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 11 carbon, or alkenyl having 2 to 12 carbons in which arbitrary hydrogen is replaced by fluorine; ring A and ring B are each independently and at least one of ring A and ring B is X 1 and X 2 are each independently fluorine or chlorine; Z 1 is methyleneoxy or carbonyloxy; and Z 2 is a single bond or ethylene.