Patent ID: 8506842

Claim:
A liquid crystal composition having a nematic phase and including 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, at least one compound selected from the group of compounds represented by formula (3) as a third component, and at least one compound selected from the group of compounds represented by formula (4) as a fourth component, in which the ratio of the third component is 5% to 80% based on the total weight of liquid crystal composition wherein R 1 is independently 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 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; Z 1 , Z 2 , Z 3 and Z 4 are independently a single bond, ethylene or carbonyloxy or difluoromethyleneoxy; Z 5 is a single bond or ethylene; X 3 , X 4 , X 5 and X 6 are hydrogen or fluorine; Y 1 is fluorine, chlorine or trifluoromethoxy; at least one of Z 1 and Z 2 is difluoromethyleneoxy in formula (1).