Patent ID: 8728590

Claim:
A liquid crystal composition that has a negative dielectric anisotropy and contains 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 (4-2) as a fourth component: wherein R 1 , R 3 and R 5 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkenyl containing only one double bond and having 2 to 12 carbons; R 2 , R 4 , and R 6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkenyl having 2 to 12 carbons; R 7 is independently alkyl having 1 to 12 carbons or alkoxy having 1 to 12 carbons; ring A is 1,4-cycrohexylene, or 1,4-pnenylene; X 1 , X 2 , X 3 and X 4 are independently fluorine or chlorine; Y 1 is independently hydrogen or methyl; Z 1 is independently a single bond or ethylene.