Kyowa Hakko Chemical Co., Ltd.

Junzo Yamano

Ikuo Shimizu

Motoharu Kinugasa

Katsumi Ukai

The present invention provides a filter for electronic display devices, comprising a squarylium compound represented by General Formula (I): [wherein Rand Rmay be the same or different and each represents a hydrogen atom, an alkyl group optionally having substituent(s), an aralkyl group optionally having substituent(s), an aryl group optionally having substituent(s), or a heterocyclic group optionally having substituent(s); X represents a group represented by following Formula (A): (wherein Rand Rmay be the same or different and represents a hydrogen atom, an alkyl group optionally having substituent(s), an alkoxy group optionally having substituent(s), an aralkyl group optionally having substituent(s), an aryl group optionally having substituent(s), or a heterocyclic group optionally having substituent(s), wherein Rand Rmay be combined together with the adjacent nitrogen atom thereto form a heterocyclic group optionally having substituent(s))].

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Mie, Japan

Junzo Yamano