US 7,597,943 B2
Liquid crystal composition and liquid crystal display device
Masayuki Saito, Chiba (Japan)
Assigned to Chisso Corporation, Osaka (Japan); and Chisso Petrochemical Corporation, Tokyo (Japan)
Filed on Jul. 19, 2007, as Appl. No. 11/826,919.
Claims priority of application No. 2006-198658 (JP), filed on Jul. 20, 2006.
Prior Publication US 2008/0017836 A1, Jan. 24, 2008
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 19/30 (2006.01); C09K 19/12 (2006.01); C09K 19/20 (2006.01)
U.S. Cl. 428—1.1  [252/299.63; 252/299.66; 252/299.67] 28 Claims
 
1. A liquid crystal composition having a negative dielectric anisotropy comprising two components, wherein the first component is at least one compound selected from the group of compounds represented by Formula (1), and the second component is at least one compound selected from the group of compounds represented by Formula (2):

OG Complex Work Unit Drawing
wherein R1 and R2 are each independently alkyl having 1 to 12 carbons, alkoxy having from 1 to 12 carbons, alkenyl having 2 to 12 carbons or alkenyl having 2 to 12 carbons, arbitrary hydrogen of which are replaced by fluorine; Z1 is a single bond or —(CH2)2—; and one of Y1 or Y2 is fluorine and the other is hydrogen.