Patent ID: 7112290
Filing Date: 2006-09-26
Classification: C09K

Abstract:
1. A chiral nematic liquid crystal composition comprising: at least one optically active compound represented by general formula (I-a):  wherein * indicates a position of an asymmetric carbon atom;  R  A  Z  Y wherein the natural pitch induced upon addition of the compound represented by general formula (I-a) to a nematic liquid crystal decreases with increasing temperature; and at least one optically active compound represented by general formula (II-a):  wherein R  The meaning of each of P  The meaning of P  L  s represents 0, 1, or 2, and in a case in which s=2, a plurality of P  wherein C represents an amount of added optically active compound in weight %, and P represents a natural pitch in μm of at least 3, and  wherein the natural pitch induced upon addition of the compound represented by general formula (II-a) to a nematic liquid crystal increases with increasing temperature.