Patent ID: 8133410

Claim:
A liquid crystal composition having a nematic phase that comprises at least one compound selected from the group of compounds represented by formulas (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 alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; R 2 and R 3 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; ring A, ring B and ring C are each independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene or 2,5-difluoro-1,4-phenylene; Z 1 , Z 2 and Z 3 are each independently a single bond, ethylene, carbonyloxy or difluoromethyleneoxy, wherein at least one of Z 1 , Z 2 and Z 3 is difluoromethyleneoxy; Z 4 and Z 5 are each independently a single bond, ethylene or carbonyloxy; X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 and X 8 are each independently hydrogen or fluorine; Y 1 is fluorine, chlorine or trifluoromethoxy; and m is 0 or 1.