Patent ID: 8337718

Claim:
A liquid crystal composition that has a nematic phase and comprises three components, wherein a first component is at least one compound selected from the group of compounds represented by formula (1), a second component is at least one compound selected from the group of compounds represented by formula (2), and a third component is at least one compound selected from the group of compounds represented by formula (3-1) to formula (3-3) and at least one compound selected from the group of compounds represented by formula (3-1-2): wherein R 1 is alkyl having 1 to 12 carbons or alkenyl having 2 to 12 carbons; R 2 is alkyl having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which hydrogen is replaced by fluorine; R 3 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkoxymethyl having 2 to 12 carbons or alkenyl having 2 to 12 carbons; R 4 , R 5 and R 6 are each independently alkyl having 1 to 12 carbons or alkenyl having 2 to 12 carbons; the ring A, the ring B, the ring C and the ring D are each independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene or tetrahydropyran-2,5-diyl; the ring E is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene or tetrahydropyran-2,5-diyl; the ring F is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 1,3-dioxane-2,5-diyl or tetrahydropyran-2,5-diyl; X 1 is hydrogen or fluorine; X 2 , X 3 , X 4 , X 5 and X 6 are each independently hydrogen or fluorine; Y 1 is fluorine, chlorine or trifluoromethoxy; Y 2 , Y 3 and Y 4 are each independently fluorine, chlorine or trifluoromethoxy; Z 1 is independently a single bond, ethylene or carbonyloxy; and m is 0, 1 or 2.