Squarylium-Verbindungen als Filter für elektronische Anzeigevorrichtungen

摘要

The present invention provides filters for an electronic display device comprising a squarylium compound represented by the general formula (I): wherein X represents a nitrogen atom or an oxygen atom; Q represents a carbon atom, a nitrogen atom, an oxygen atom or a sulfur atom; and R<1>, R<2>, R<3>, R<4>, R<5>, R<6> and m are as defined in the specification. The filters for an electronic display device of the present invention can selectively shield the light having such a wavelength that reduces the color purity, and thereby can provide clear images.