Patent ID: 7715083

Claim:
A light control material, which contains a stimulus sensitive resin and is capable of controlling the light transmittance in a specific wavelength range, said stimulus sensitive resin being a polyacetylene compound having a repeating unit represented by the following general formula (1): in the formula (1), R 1 represents a naphthalene group, a phenanthrene group, a pyrenyl group or an anthracene group, each of the four groups being substituted by a group selected from the group consisting of: an alkyl group having 1 to 40 carbon atoms, an alkoxy group (with an alkyl group having 1 to 40 carbon atoms), an SR 4 group (R 4 represents a hydrogen atom or an alkyl group having 1 to 40 carbon atoms), an NR 5 R 6 group (R 5 and R 6 may be the same or different, and each represents a hydrogen atom or a group selected from alkyl groups having 1 to 40 carbon atoms), a cyano group, a carboxy group, a sulfoxyl group, an ester group, an amide group and COR 7 (R 7 represents an alkyl group having 1 to 40 carbon atoms), or the following general formula (2): in the formula (2), R 2 represents a naphthalene group or an anthracene group; R 3 represents a phenyl group substituted by a substituent X at the position m or the position p; and the substituent X represents a group selected from the group consisting of: an alkyl group having 1 to 20 carbon atoms, an alkoxy group (with an alkyl group having 1 to 20 carbon atoms), an SR 4 group (R 4 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms), an NR 5 R 6 group (R 5 and R 6 may be the same or different, and each represents a hydrogen atom or a group selected from alkyl groups having 1 to 20 carbon atoms), a cyano group, a carboxy group, a sulfoxyl group, an ester group, an amide group and COR 7 (R 7 represents an alkyl group having 1 to 20 carbon atoms).