Coloring composition, color filter substrate using same, and display device

A technology for coloring compositions and color filter substrates, which is applied in the directions of photosensitive materials, instruments, filters, etc. used in optomechanical equipment, can solve the problem of dimming the brightness of liquid crystal display devices, the reduction of light transmittance of green pixels, and the loss of light. Reduce the transmittance and other problems, to achieve the effect of suppressing the decrease in light transmittance, high light transmittance, and high color purity

Active Publication Date: 2021-07-13
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] On the other hand, it is known that when phthalocyanine is irradiated with light while blocking oxygen, the absorption spectrum changes and the light transmittance of a green pixel formed of phthalocyanine decreases (see, for example, Non-Patent Document 1).
That is, when light is irradiated to a liquid crystal display device having green pixels made of phthalocyanine in a state where oxygen is blocked, the light transmittance of the green pixels decreases, and the brightness of the liquid crystal display device becomes dark.

Method used

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  • Coloring composition, color filter substrate using same, and display device
  • Coloring composition, color filter substrate using same, and display device
  • Coloring composition, color filter substrate using same, and display device

Examples

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Embodiment

[0121] The following examples are given to illustrate the present invention, but the present invention is not limited to these examples. First, evaluation methods in Examples and Comparative Examples will be described.

[0122]

[0123] The coloring composition obtained by Examples 1-13 and Comparative Examples 1-8 was apply|coated on the glass substrate, and it heat-dried at 90 degreeC for 10 minutes after that. The resulting coating film of the colored composition was subjected to i-rays at 200 mJ / cm through a negative-type photomask. 2 After exposure, it develops with 23 degreeC 0.3 mass % tetramethylammonium hydroxide aqueous solution, and forms a desired pattern. Next, heat treatment was performed at 230° C. for 30 minutes to obtain a film having a film thickness of 1.7 μm. However, only Example 13 had a film thickness of 2.5 μm. About this film, the chromaticity x, y, and light transmittance Y were measured with C light source using the spectrophotometer LCF-100MA m...

manufacture example 1

[0129] Production Example 1 (Preparation of Dispersion Liquid (A1))

[0130] C.I. Pigment Yellow 185 ("Paliotol" (registered trademark) Yellow D1155 manufactured by BASF) 150 g, "BYK" (registered trademark) LPN6919 (manufactured by Bic Chemical Co., polymer dispersant solution (60% by mass propylene glycol monomethyl ether solution)) 125 g, 100 g of "Sychroma" (registered trademark) ACA250 (manufactured by Daicel Chemical Co., Ltd., 45 mass % dipropylene glycol monomethyl ether solution) and 625 g of propylene glycol monomethyl ether (PMA) were mixed to prepare a slurry. Connect the beaker containing the slurry to a dyno-mill, use zirconia beads with a diameter of 0.5mm as the medium, and perform dispersion treatment at a peripheral speed of 14m / s for 8 hours to prepare C.I. Pigment Yellow 185 Dispersion (A1).

manufacture example 2

[0131] Production Example 2 (Preparation of Dispersion Liquid (A2))

[0132] In place of C.I. Pigment Yellow 185, except that 150 g of C.I. Pigment Green 58 ("FASTGEN" (registered trademark) Green A110 manufactured by DIC Co., Ltd.) was used, the C.I. Pigment Green 58 dispersion was prepared in the same manner as Production Example 1 (A2).

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Abstract

The purpose of the present invention is to provide a coloring composition with high color purity and light transmittance, which can suppress the decrease in light transmittance caused by light irradiation, and a color filter substrate using such a coloring composition. The present invention is a coloring composition , which contains: a green coloring agent having a metal phthalocyanine skeleton, and a yellow coloring agent comprising C.I. Pigment Yellow 138 and / or C.I. Pigment Yellow 185, the green coloring agent having a metal phthalocyanine skeleton and C.I. The total content of 185 is 2 mass % or more and 16 mass % or less in solid content.

Description

technical field [0001] The present invention relates to a coloring composition, a color filter substrate using the coloring composition, and a display device. Background technique [0002] Liquid crystal display devices are used in various applications such as televisions, notebook PCs, portable information terminals, smartphones, and digital cameras, taking advantage of their light weight, thin profile, and low power consumption. In a liquid crystal display device, an optimal color of 3 to 6 primary colors is required depending on the application, and a color filter substrate responsible for various color performances is used. [0003] In green pixels, combinations of various pigments have been studied, but generally a green colorant (color material) having a metal phthalocyanine skeleton is combined with a yellow colorant. With regard to such technology, for example, the following green colorant composition is known, which contains a green colorant (colorant) selected fro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/20C09B67/22G02B5/20G03F7/004G03F7/027
CPCG02B5/20G03F7/004G03F7/027C09B67/0035
Inventor 小田拓郎桥本升太山下哲夫
Owner TORAY IND INC
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