Patent ID: 8236197

Claim:
The invention concerns a liquid crystal composition having a negative dielectric anisotropy that includes two components, wherein the first component is at least one compound selected from the group of compounds represented by formula (1), the second component is at least one compound selected from the group of compounds represented by formula (2): wherein R 1 , R 2 , R 4 and R 13 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, B and G are independently 1,4-cyclohexylene or 1,4-phenylene; Z 1 ,Z 2 and Z 3 are independently a single bond, ethylene, methyleneoxy or carbonyloxy; and s is 0, 1 or 2; p is 0,1 or 2; R 13 is alkenyl having 2 to 12 carbons when ring G in the formula (2) is 1,4-cyclohexylene; wherein the ratio of the first component is from approximately 5% by weight to approximately 35% by weight, and the ratio of the second component is from approximately 10% by weight to approximately 65% by weight, based on the total weight of liquid crystal composition, which further contains a third component selected from the group of the following mixtures: a mixture of at least one compound selected from the group of compounds represented by formula (3-1), and at least one compound selected from the group of compounds represented by formula (3-6), a mixture of at least one compound selected from the group of compounds represented by formula (3-6), and at least one compound selected from the group of compounds represented by formula (3-10), and a mixture of at least one compound selected from the group of compounds represented by formula (3-1), at least one compound selected from the group of compounds represented by formula (3-4), and at least one compound selected from the group of compounds represented by formula (3-6), wherein R 5 , R 6 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.