Patent ID: 7544308

Claim:
A dichroic dye having a formula (I), of: or formula (II), of: wherein, X 1 and X 2 are the same or different and comprise —H, —OH, or —NH 2 ; G 1 is G 2 is H, F, Cl, Br, —NH 2 , —NO 2 , or L is —CH═N—, —C≡C—C≡C—, P 1 and P 2 are the same or different and comprise —H, —R 3 , —OR 3 , —NHR 3 , —N(R 3 ) 2 , or wherein, X 1 and X 2 are the same or different and comprise —H, —OH, or —NH 2 ; G 1 is G 2 is H, F, Cl, Br, —NH 2 , —NO 2 , or L is —CH═N—, —C≡C—C≡C—, P 1 and P 2 are the same or different and comprise —H, —R 3 , —OR 3 , —NHR 3 , —N(R 3 ) 2 , or A and B independently comprise O, S, or —NH—; Z 1 and Z 2 are the same or different and comprise O, S, —C═C—, —C≡C—, —CH═N—, —N═N—, —CH═N—, Ar 1 and AR 2 are the same or different and comprise the phenyl group, biphenyl group, naphthyl group, or heterocyclic group; AR 3 and AR 4 are the same or different and comprise the phenyl group, biphenyl group, or heterocyclic group; R 1 , R 2 and R 3 are the same or different and comprise H, C 1-8 alkyl group, C 1-8 alkoxy group, hydroxyl group, C 3-6 cycloalkyl group, C 1-4 fluoroalkyl group, or —NCS; and n, m, i, and j are the same or different and comprise 0, 1, or 2.