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Processes for producing color filter and for producing liquid-crystal display

A manufacturing method and filter technology, which can be applied to instruments, filters, optics, etc., can solve the problems of low pigment concentration of coloring ink, inability to color filters, and difficulty in suppressing color mixing, etc., and achieve high transmission concentration and high reliability. , the effect of brightness improvement

Inactive Publication Date: 2010-08-18
SEIREN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the production method disclosed here is adopted, since the pigment concentration of the colored ink is low, in order to obtain the color purity and color reproducibility of the color filter, it is necessary to adopt a complicated process of repeating the ink filling process, and the yield decreases.
[0014] As a color filter constituting a liquid crystal element, high color purity and color reproducibility are required, that is, a high concentration of colorant in the colored part is required. In the method of increasing the amount of ink, when the amount of ink added increases, it is difficult to suppress color mixing due to ink bleeding, so it is impossible to manufacture color filters with good yield
[0015] As mentioned above, the method of forming a colored layer by an inkjet method and manufacturing a color filter has excellent straightness and stability when ejected from the head of an inkjet nozzle, and high There is no method for color purity and color reproducibility

Method used

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  • Processes for producing color filter and for producing liquid-crystal display

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0163]

[0164] (1) Preparation of red pigment dispersion for color filter

[0165] Red pigment, pigment dispersant and organic solvent were mixed according to the following proportions, 500 parts of zirconium beads with a diameter of 0.3 mm were added, and dispersed for 4 hours with a paint shaker to obtain a pigment dispersion (R).

[0166] (composition of pigment dispersion)

[0167] Red pigment (C.I. Pigment Red 254): 10 parts

[0168] Pigment dispersant (manufactured by AVECIA: Solus Pass 24000): 10 parts

[0169] DPMA (dipropylene glycol methyl ether acetate; boiling point = 209°C, surface tension = 27mN / m): 80 parts

[0170] (2) Preparation of green pigment dispersion for color filter

[0171] Pigment dispersion was prepared in the same way as in Production Example 1, except that 10 parts of green pigment (C.I. Pigment Green 36) and 10 parts of yellow pigment (C.I. Pigment Yellow 150) were used instead of 10 parts of red pigment (C.I. Pigment Red 254) in (1) above....

manufacture example 2

[0174]

[0175] As the solvent in Production Example 1, except that BCA (diethylene glycol butyl ether acetate; boiling point = 247° C., surface tension = 30 mN / m) was used instead of DPMA, the same solvent as in Production Example 1 (1) to (3) was used. The same method was used to prepare red, green and blue pigment dispersions respectively.

manufacture example 3

[0176]

[0177] 15 parts of polyester acrylic oligomer, 15 parts of dipentaerythritol hexaacrylate (hereinafter referred to as DPHA), 20 parts of 1,6-hexanediol diacrylate, 45.5 parts of dipropylene glycol methyl ether acetate, and Chiba Special Tei After mixing 0.5 part of a photopolymerization initiator "Irugakyua-369" manufactured by Chemikalus Co., Ltd., it was filtered through a filter with a pore diameter of 1.0 μm to obtain a transparent resin solution.

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Abstract

To provide a process for producing a color filter with an ink-jet ink excellent in rectilinear flight and stability after discharge from a head, the process being able to impart a high color purity and color reproducibility; and a liquid-crystal display employing a color filter produced by the process. A color filter is produced by: applying a pigment dispersion selectively to partitioned areas in a surface of a transparent insulation base by an ink-jet printing technique (pigment dispersion application step); subsequently applying a transparent resin solution selectively to the partitioned areas by an ink-jet printing technique to mix the pigment dispersion with the transparent resin solution within each partitioned area and form a liquid mixture layer (transparent-resin-solution application step); and then curing the liquid mixture layer formed in the preceding step (curing step).

Description

technical field [0001] The present invention relates to an inkjet ink for a color filter used for forming a cured layer of a predetermined pattern in a pixel portion (colored layer), a method for producing the ink for ink, a method for producing a color filter using the ink for inkjet, And a method for manufacturing a liquid crystal display device using the color filter. Background technique [0002] In recent years, along with the development of personal computers, especially portable personal computers, the demand for liquid crystal displays, especially color liquid crystal displays, tends to increase. However, since such a color liquid crystal display is expensive, there is a strong demand for cost reduction, especially for color filters with relatively high cost. [0003] In such a color filter, for example, the surface of a transparent substrate formed of glass or plastic is generally formed with three primary color colored layers of red (R), green (G) and blue (B), an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02F1/1335
CPCG02F1/133516G02B5/223G02B5/201
Inventor 山田耕平盐见秀数岛田芳永山田英幸
Owner SEIREN CO LTD