FILTER AND CYANINE COMPOUND - NIPPON KAYAKU KK

Title:

FILTER AND CYANINE COMPOUND

Document Type and Number:

WIPO Patent Application WO/2006/006573

Kind Code:

A1

Abstract:

This invention provides an optical filter which, for example, in plasma display panels, can cut off unnecessary near infrared light or neon light or the like and can prevent unfavorable phenomena such as reflection of fluorescent light and, at the same time, has good visible light transmittance and is also good, for example, in heat resistance and moisture resistance of coloring matter contained in the filter. This optical filter comprises a salt of a cation of a cyanine dye with a di(halogenoalkylsulfonyl)imide anion, preferably a cyanine compound represented by the following formula (1) wherein Q and Q’ each independently represent an optionally substituted benzene ring or a naphthalene ring; R and R’ each independently represent an alkyl or alkoxyalkyl group; and L represents a linking group for carbocyanine formation. This optical filter is useful, for example, for a filter for near infrared cut-off purposes or image property improvement purposes in displays.

Inventors:

TORINIWA TOSHITAKA (JP)
KONDO TERUMASA (JP)
IKEDA MASAAKI (JP)

Application Number:

PCT/JP2005/012791

Publication Date:

January 19, 2006

Filing Date:

July 11, 2005

Export Citation:

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Assignee:

NIPPON KAYAKU KK (JP)
TORINIWA TOSHITAKA (JP)
KONDO TERUMASA (JP)
IKEDA MASAAKI (JP)

International Classes:

G02B5/22; C07D209/14; C07D209/60; C07D215/06; C07D277/64; C07D401/14; C07D405/14; C07D417/08; C09B23/00; C09B69/02; C09K3/00; G02B5/28

Domestic Patent References:

WO2004048480A1

2004-06-10

Foreign References:

JP2003337410A	2003-11-28
JPH08253705A	1996-10-01
JP2005077807A	2005-03-24
JP2002350632A	2002-12-04
JP2004350632A	2004-12-16

Other References: