COMPOSITION FOR OPTICAL FILTER, OPTICAL FILTER, FRONT FILTER FOR DISPLAY AND SQUARYLIUM COMPOUND

PROBLEM TO BE SOLVED: To provide a composition for optical filters containing a squarylium compound which improves color purity, color temperature, light resistance and solution storage stability and has absorption at about 560-620 nm, and to provide an optical filter and a front filter for display...

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Hauptverfasser: SEKINE NOBORU, OKUBO KIMIHIKO
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a composition for optical filters containing a squarylium compound which improves color purity, color temperature, light resistance and solution storage stability and has absorption at about 560-620 nm, and to provide an optical filter and a front filter for display using the composition. SOLUTION: The composition for optical filters contains a squarylium compound represented by formula (1) and a binder, wherein B1-B4are each a carbon atom or a nitrogen atom, in the case of a carbon atom, it has a hydrogen atom or a substituent; R1and R2each represent a hydrogen atom or a substituent; and A represents an atomic group required to form a nitrogen-containing heterocyclic 5-membered condensed ring. COPYRIGHT: (C)2009,JPO&INPIT