Patent ID: 7820071

Claim:
A light modulating material comprising at least one kind of dichroic dye having a substituent represented by the following Formula (1) and at least one kind of host liquid crystal, which contains a chiral reagent, between a pair of electrodes, and changing the transmittance of incident light: -(Het) j -{(B 1 ) p -(Q 1 ) q -(B 2 ) r } n —C 1 Formula (1): wherein, Het is oxygen atom or sulfur atom; B 1 and B 2 each independently represent an arylene group, a heteroarylene group or a bivalent cyclic aliphatic hydrocarbon group; Q 1 represents a bivalent linking group; C 1 represents an alkyl group, a cycloalkyl group, an alkoxy group, an alkoxycarbonyl group, an acyl group, or an acyloxy group; j represents 0 or 1; p, q and r each independently represent an integer from 0 to 5; n represents an integer from 1 to 3; (p+r) ×n is an integer from 3 to 10; when p is 2 or larger, two or more groups represented by B 1 may be the same or different; when q is 2 or larger, two or more groups represented by Q 1 may be the same or different; when r is 2 or larger, two or more groups represented by B 2 may be the same or different; and when n is 2 or larger, two or more groups represented by {(B 1 ) p -(Q 1 ) q -(B 2 ) r } may be the same or different.