Color material dispersion liquid, color resin composition for color filters, color filter, liquid crystal display device and organic light-emitting display device

Patent metadata

Field	Value
Publication number	US-9005722-B2
Application number	US-201414163250-A
Country	US
Kind code	B2
Filing date	Jan 24, 2014
Priority date	Apr 21, 2011
Publication date	Apr 14, 2015
Grant date	Apr 14, 2015

Abstract

A color material dispersion liquid comprising a color material represented by the following general formula (I), a dispersant, and a solvent having a solubility of the color material of 0.1 (mg/10 g solvent) or less at 23° C.,

having excellent solvent resistance and excellent electrical reliability; a color resin composition for color filters, which can form a color layer that has high contrast, excellent solvent resistance and excellent electrical reliability; a color filter formed with the color resin composition for color filters; a liquid crystal display device having the color filter; and an organic light-emitting display device having the color filter.

First claim

The invention claimed is:

1. A color material dispersion liquid comprising a color material represented by the following general formula (I), a dispersant, and a solvent having a solubility of the color material of 0.1 (mg/10g solvent) or less at 23° C.:

wherein A is an “a”-valent organic group in which a carbon atom directly bound to the N of qeneral formula (I) has no π bond, and the organic group is an aliphatic hydrocarbon group having a saturated aliphatic hydrocarbon group at least at a terminal position directly bound to the N of general formula (I), or an aromatic group having the aliphatic hydrocarbon group having saturated aliphatic hydrocarbon group at least at a terminal position directly bound to the N of general formula (I), and O, S, N may be contained in a carbon chain of the organic group; B c− is a “c”-valent anion of an inorganic acid containing molybdenum and/or tungsten; each of R 1 to R 5 is independently a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent; R 2 and R 3 may be bound to form a ring structure, and/or R 4 and R 5 may be bound to form a ring structure; Ar 1 is a divalent aromatic group which may have a substituent; R 1 s may be the same or different; R 2 s may be the same or different; R 3 s may be the same or different; R 4 s may be the same or different; R 5 s may be the same or different; and Ar 1 s may be the same or different; and
wherein each of “a” and “c” is an integer of 2 or more; each of “b” and “d” is an integer of 1 or more; “e” is 0 or 1 and there is no bond when “e” is 0; and “e”s may be the same or different.

2. The color material dispersion liquid according to claim 1 , wherein “a” in the general formula (I) is an integer from 2 to 4.

3. The color material dispersion liquid according to claim 1 , wherein the solvent is an ester solvent.

4. The color material dispersion liquid according to claim 1 , wherein the dispersant is a polymer dispersant in which a nitrogen atom is contained in a main or side chain thereof.

5. A color resin composition for color filters, comprising the color material dispersion liquid defined by claim 1 and a binder component.

6. A color filter comprising at least a transparent substrate and color layers present on the substrate, wherein at least one of the color layers is a color layer which is a cured product of the color resin composition defined by claim 5 .

7. A liquid crystal display device comprising the color filter defined by claim 6 , a counter substrate, and a liquid crystal layer present between the color filter and the counter substrate.

8. An organic light-emitting display device comprising the color filter defined by claim 6 and an organic light-emitting material.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Okada Masato

Classifications

• C09B69/02

  Dyestuff salts, e.g. salts of acid dyes with basic dyes · CPC title

• G03F7/0007

  Filters, e.g. additive colour filters; Components for display devices · CPC title

• C09D11/326

  characterised by the pigment dispersant · CPC title

• G02B1/041

  Lenses · CPC title

• G03F7/105

  having substances, e.g. indicators, for forming visible images · CPC title