JP2002302626A - Recording ink, ink jet recording process, color filter manufacture process, liquid crystal display panel and its manufacture process - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording ink, an ink jet recording process, processes for manufacturing color filters and liquid crystal display panels, and a liquid crystal display panel. SOLUTION: The recording ink contains at least a water-soluble azopyridone- based dye of formula (1) and a water-soluble organic solvent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a recording ink, an ink jet recording method, a method for manufacturing a color filter, a color filter, a method for manufacturing a liquid crystal display panel, a liquid crystal display panel, and a yellow ink.

[0002]

2. Description of the Related Art A color filter is an important component of a color liquid crystal display. This filter is formed by repeating pixels composed of three primary colors of red (R), green (G) and blue (B) on a transparent substrate. It has a structure in which many are arranged.

In recent years, with the development of personal computers, especially portable personal computers, the demand for liquid crystal displays, especially color liquid crystal displays, has been increasing. However, for further widespread use, it is necessary to provide a display with higher definition and higher image quality, and at the same time, to satisfy the conflicting demands to lower the manufacturing cost of the display body.
In particular, the demand for a color filter having a high specific gravity in a product in terms of cost is rapidly increasing. However, while satisfying the required characteristics of color filters,
Various methods have been tried to meet the above requirements, but none of them satisfy all the required characteristics.

[0004] A typical method of manufacturing a color filter will be described below. The first method most frequently used is a staining method. In the dyeing method, a photosensitive agent is added to a water-soluble polymer material that is easy to dye, and this is patterned into a desired shape on a transparent support by a photolithography process, and the resulting pattern is obtained. Is immersed in a dye bath to obtain a colored pattern. Repeat the above steps 3
By repeating this process, color filters of R, G, and B are formed.

The second most frequently used method is the pigment dispersion method, which is recently replacing the above-mentioned dyeing method. In this method, first, a photosensitive resin layer in which a pigment is dispersed is formed on a substrate, and this is patterned to obtain a monochromatic pattern. By repeating this process three times, R, G, and B three-color color filters are formed.

A third method is an electrodeposition method. In this method, first, a transparent electrode is patterned on a substrate. Next, the substrate is immersed in an electrodeposition coating liquid containing a pigment, a resin, an electrolytic solution, and the like, and the first color is electrodeposited. This process is repeated three times to form R, G, and B color filter layers, and finally baking to form color filters. In any of the first to third methods, a protective layer is generally formed on the colored layer.

The fourth method is a printing method. In the printing method,
A pigment is dispersed in a thermosetting resin, and printing is repeated three times to form R, G, and B color filter layers, and then the resin is thermoset to form a colored layer. What is common to all of the above-mentioned methods is that the same process is performed three times to color the three colors of R, G, and B.
It is repeated many times, which inevitably leads to high manufacturing costs. Further, there is a problem that as the number of steps increases, the yield of products decreases.

Further, in the electrodeposition method, since the pattern shape that can be formed is limited, the current technology cannot be applied to a TFT color liquid crystal display. Further, the fourth printing method has a drawback that resolution and smoothness are poor, so that a fine pitch pattern cannot be formed.

As described above, there are already several methods for producing a color filter. From the viewpoint of emphasizing the chromaticity of a display, a dyeing method using a dye as a coloring material is generally advantageous. ing. However, as described above, in the dyeing method, when forming a pixel, since a method of immersing a substrate having a receiving layer in a staining solution is adopted, a dye that is difficult to dye on the receiving layer used is, for example, There is a disadvantage that it cannot be used even if the color tone (spectral characteristics) is good. On the other hand, in order to increase the types of dyes that can be used, when the dye is anionic,
Attempts have generally been made to improve the dyeing properties of dyes by introducing cationic groups such as quaternary ammonium.
However, this method has problems such as a change in the color tone of the dye (spectral shift) and a decrease in heat resistance.

Further, when a dye solution comprising a plurality of dyes is used for toning, the dyeing properties between each dye and the receiving layer are not always the same, so that the desired color tone should be controlled. There is also a problem that it becomes difficult. For this reason, in reality, not only is it difficult to delicately control the color tone, but also the types of dyes and receiving layer materials that can be used are greatly restricted.

In order to improve these drawbacks, a method of manufacturing a color filter using an ink jet method has been proposed (Japanese Patent Application Laid-Open Nos. 59-75205 and 63).
-235901, JP-A-1-217302, JP-A-4-123005, etc.). These methods differ from the above-described methods in that a coloring liquid (ink) containing each of the R, G, and B dyes is ejected from a nozzle, applied directly to the filter substrate, and the attached ink is dried on the filter substrate. It forms a pixel.

According to this method, since the dyeing process between the dye and the receiving layer as in the above-described dyeing method is not performed in forming the colored portion, the dyeing property is improved by introducing a cationic group into the receiving layer. There is the advantage that no means need be used.
Therefore, it is possible to avoid problems such as a change in the color tone (spectral shift) of the dye itself before and after dyeing and a decrease in heat resistance. Further, in the case where an ink containing a plurality of dyes is used for toning. Also, the color tone does not significantly differ from the expected one. In addition, the formation of each of the R, G, and B colored layers can be performed at one time, and there is no waste in the amount of ink used. Therefore, effects such as significant improvement in productivity and cost reduction can be expected.

[0013]

However, in the conventional method for producing a color filter by an ink jet recording method, the dye used is not always suitable for the ink jet system, and the matching of the dye with the material of the receiving layer is not always required. In addition, there are many technically unclear points about the drawing conditions (the kind of the receiving layer and the amount of the dye jetted thereon) by the ink jet method. Because of this, there were new technical issues to be solved such as those listed below.
None of the following required characteristics were satisfied, and it was desired to establish an immediate solution to the problem.

(1) Good adhesion between the colored portion and the color filter substrate. (2) The color purity of the colored portion is high (for example, in the case of a B pixel, light in the G and R wavelength bands is sufficiently shielded). (3) No bleeding of the colored portion. (4) The heat resistance of the colored portion is good.

In view of such a technical background, the present inventors have repeatedly studied and found that an ink obtained by combining an azopyridone dye having a specific structure with a phthalocyanine dye is used as an ink for forming a green pixel of a color filter. The above-mentioned various conditions can be satisfied at a high level. Similarly, an ink in which an azopyridone-based dye having a specific structure is combined with a xanthene-based dye having a specific structure is used as the ink for forming a red pixel of a color filter. Can be satisfied at a high level, and that the yellow ink containing the azopyridone-based dye having the specific structure can be preferably used as an ink for forming a yellow image observed by transmitted light. Obtained. The present invention has been made based on such new findings, and the object thereof is to manufacture a color filter by an ink-jet method, which can satisfy the above-described various conditions preferably provided at an extremely high level. To provide ink.

Also provided are an ink jet recording method using the ink, a color filter having green pixels formed by the ink, a method of manufacturing the color filter, and a liquid crystal display panel using the color filter and a method of manufacturing the liquid crystal display panel. It is also an object of the present invention. Still another object is to provide, for example, a yellow ink that can be suitably used for forming a yellow image observed with transmitted light.

[0017]

The above objects are achieved by the present invention described below. That is, the recording ink according to one embodiment of the present invention is characterized by containing at least a water-soluble azopyridone dye represented by the following general formula (1) and a water-soluble organic solvent.

(Wherein A and B independently represent a hydrogen atom, a halogen atom, a nitro group, an amino group, a phosphone group, a sulfone group, a sulfamide group, a carboxyl group, a trifluoromethyl group, an alkyl group having 4 or less carbon atoms, Represents an alkoxy group having 4 or less carbon atoms, an aryl group which may have any of the above substituents, or a salt group of these groups, and X represents a hydrogen atom, a methyl group, a carboxyl group, a trifluoromethyl group, Or a salt group of these groups; Y represents a hydrogen atom, a cyano group, an aminocarbonyl group such as a carbamoyl group, a sulfone group, a sulfomethyl group, or a salt group of these groups; And at least one of A, B and Y represents a sulfone group, a sulfomethyl group or a salt group of these groups.)

Further, an ink jet recording method according to an embodiment of the present invention is characterized in that ink jet recording is performed using the recording ink which is an ink jet ink. Further, a method of manufacturing a color filter according to one embodiment of the present invention includes a step of forming a plurality of colored pixels using the recording ink.

Further, in a method of manufacturing a color filter according to another embodiment of the present invention, the recording ink further includes a film-forming component, and the film is irradiated with heat or light or both after application of the ink. And a step of forming a colored pixel by coating the ink applied on the substrate with a film of the ink applied on the substrate. Further, a color filter according to an embodiment of the present invention is manufactured by the above-described method for manufacturing a color filter.

A color filter according to another embodiment of the present invention is a color filter including a green pixel,
The green pixel contains a water-soluble azopyridone dye represented by the general formula (1) and a phthalocyanine dye represented by the following general formula (2).

(Wherein R _{1 to} R ₄ each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a sulfone group, a sulfamide group, a carboxyl group, an alkyl group having 5 or less carbon atoms, an alkoxy group having 5 or less carbon atoms) An aryl group optionally having any of the above substituents, a phenoxy group optionally having any of the above substituents, a thiophenoxy group optionally having any of the above substituents, or a group thereof M represents two hydrogen atoms, two sodium atoms,
Represents two lithium atoms, a divalent metal or a trivalent or tetravalent metal derivative, and has at least two or more sulfone groups or salts thereof in the structure. )

A color filter according to another embodiment of the present invention is a color filter including red pixels,
The red pixel contains a water-soluble azopyridone dye represented by the general formula (1) and a xanthene dye represented by the following general formula (3).

(Wherein, Z _{1 to} Z ₇ each independently represent a hydrogen atom or a halogen atom, Y ₁ represents a sulfone group, a carboxyl group, a sulfamide group, a carboxamide group or a salt group of these groups; ₂ is a hydrogen atom, a sulfone group,
X ₁ represents a sulfoamide group or a salt group of these groups;
Represents a group having any of the structures represented by the following general formula (4), and X ₂ represents a group having any of the structures represented by the following general formula (5). )

[0025]

[0026] (Wherein R _{1 to} R ₄ each independently represent, as a substituent, a hydrogen atom, an alkyl group having 6 or less carbon atoms, an alkyl group having 4 or less carbon atoms, a sulfone group, or a salt group of these groups. Represents an aryl group.)

Further, a method of manufacturing a liquid crystal display panel according to one embodiment of the present invention is characterized by using the above-described color filter. Furthermore, a liquid crystal display panel according to one embodiment of the present invention uses the above-described color filter.
Further, the yellow ink according to one embodiment of the present invention is characterized by containing at least a water-soluble azopyridone dye represented by the above general formula (1) and a water-soluble organic solvent.

According to the present invention, an excellent color filter can be provided easily and economically. Further, using a color filter manufactured by such a method for manufacturing a color filter, for example, a panel substrate is provided so as to face the color filter, and at least a liquid crystal composition is sealed between the filter and the panel substrate. Thus, a liquid crystal display panel having excellent characteristics can be provided.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the recording ink of the present invention will be described in detail with reference to preferred embodiments. The present inventors have conducted intensive studies to solve the above-mentioned problems of the prior art, and as a result, by adding a specific azopyridone dye to a specific phthalocyanine dye to form an ink,
The inventors have found that a color filter having an excellent green color tone and a high light resistance with a green color tone can be produced. Incidentally, the recording ink of the present invention shows excellent performance in the conventional recording technology, ink for writing implements,
It can also be used for various recording technology applications such as ink jet inks.

First, the azopyridone dye represented by the following general formula (1), which characterizes the recording ink and yellow ink of the present invention, will be described. (Wherein A, B, X, Y and Z are as defined above)

In particular, in the synthesis of the dye as described above, trichlorotriazine is reacted with nitroaniline or a derivative thereof by a conventionally known method to synthesize a trisnitroanilide of triazine, and after reducing the nitro group to an amino group, The amino group can be synthesized by diazotizing and coupling with a pyridone-based coupler. Depending on the type of nitroaniline or its derivative selected at this time,
A and B in the above general formula can be selected. However, phenylenediamine or a derivative thereof may be used in place of nitroaniline or a derivative thereof.In this case, trisaminophenyltriazine or a derivative thereof formed depending on the type of phenylenediamine or a derivative thereof is a mixture of several isomers. It may be. By using a mixture of these several isomers for coupling, the resulting dye may also contain several isomers, but in the present invention, no particular operation for separating these isomers is used.
Used as an isomer mixture of the dye.

When the pyridone compound which is a coupler of the above dye has a cyano group, various functional groups can be introduced by hydrolyzing the cyano group by a conventional method and further performing a general operation such as sulfonation. Thus, a desired azopyridone dye can be obtained. In order to improve the light fastness and the water fastness of the formed image, it is desirable to use a compound in which X in the above formula (1) is a trifluoromethyl group. Further, in order to compensate for the decrease in water solubility due to the introduction of a trifluoromethyl group, it is desirable to use a dye in which a sulfone group, a sulfomethyl group or a salt thereof is introduced into Y.

Specifically, azopyridone dyes represented by the following chemical formulas can be used. The recording ink of the present invention is, of course, not limited to these. The yellow ink containing the azopyridone dye is particularly suitable for forming a yellow image observed with transmitted light.

Next, in the recording ink for green tones according to the present invention, the phthalocyanine dyes mainly used for adjusting the hue of the azopyridone dyes described above are those represented by the following general formula (2): Is mentioned. (In the formula, R _{1 to} R ₄ and M are as defined above.)

The method for synthesizing the phthalocyanine dyes described above is disclosed in the well-known “Precision Organic Synthesis Second Edition (Nankodo)” 41
It can be synthesized by the method described on page 8. At this time, phthalocyanine dyes having various functional groups can be obtained by appropriately selecting phthalonitrile to be used. After the phthalocyanine dye is obtained, the phthalocyanine dye is treated with concentrated sulfuric acid, fuming sulfuric acid, chlorosulfonic acid or the like to obtain a water-soluble phthalocyanine dye.

Specifically, phthalocyanine dyes represented by the following chemical formulas can be used. Of course,
The present invention is not limited to these.

With respect to the recording ink and the yellow ink of the present invention, the total content of the dyes as exemplified above in the ink is 0.5 to 20% by weight, preferably 1%.
-15% by weight. Further, other dyes may be included as necessary. According to the study of the present inventors, in a recording ink prepared for a green color tone, the water-soluble azopyridone-based dye and the phthalocyanine-based dye are used in a weight ratio of 3: 1 to 1: 3. It has been found that when contained in the range, a color filter having a green pixel having a more excellent green color tone and having higher light resistance can be obtained.

Next, in the recording ink for green color tone according to the present invention, as the xanthene dye mainly used for adjusting the hue of the azopyridone dye, the following general formula (3) is used. Is mentioned. (Wherein Z _{1 to} Z ₇ , Y ₁ , Y ₂ , X ₁ and X ₂ are as defined above.)

The above-described xanthene dye can be synthesized by a conventionally known method, for example, the method described in “Synthetic Dye Chemistry (Maki Shoten)” on page 305. At this time, by appropriately selecting the raw materials to be used, xanthene dyes having various functional groups can be obtained. Also,
After the xanthene dye is obtained, it is treated with concentrated sulfuric acid, fuming sulfuric acid, chlorosulfonic acid or the like to obtain a water-soluble xanthene dye. Specifically, CIAcid Red
50, 51, 52, 87, 91, 92, 93, 94, 9
5, 98, 289, 306, CIAcid Violet 9, 3
Commercially available xanthene dyes such as 0 and 102 can be suitably used. Of course, the present invention is not limited to these.

Further, the yellow ink according to one embodiment of the present invention is characterized by containing at least a water-soluble azopyridone dye represented by the general formula (1) and a water-soluble organic solvent. According to the present invention, an excellent color filter can be provided easily and economically.

Further, using a color filter manufactured by such a method for manufacturing a color filter, for example, a panel substrate is provided so as to face the color filter, and at least a liquid crystal composition is interposed between the filter and the panel substrate. By encapsulation, a liquid crystal display panel having excellent characteristics can be provided. In the recording ink and the yellow ink of the present invention having a dye as described above, for example, for the purpose of improving the storability in an ink applying device, the ink applying properties, the fixability to a recording medium, and the like, Although an organic solvent is added, it is particularly preferable to add a water-soluble organic solvent having a boiling point of 120 ° C. or higher.

A preferred organic solvent which can be used in the recording ink and yellow ink of the present invention, which has a boiling point of 1
Examples of the water-soluble organic solvent having a temperature of 20 ° C. or higher include amides such as dimethylformamide and dimethylacetamide; polyalkylene glycols such as polyethylene glycol and polypropylene glycol; ketone or keto alcohols such as diacetone alcohol; Alkylene glycols having an alkylene group containing 2 to 6 carbon atoms, such as propylene glycol, butylene glycol, triethylene glycol, 1,2,6-hexanetriol, thiodiglycol, hexylene glycol, diethylene glycol; glycerin; ethylene glycol Polyhydric alcohols such as monomethyl (or ethyl) ether, diethylene glycol methyl (or ethyl) ether, and triethylene glycol monomethyl (or ethyl) ether Lower alkyl ethers; N- methyl-2-pyrrolidone, 2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone. The content in the ink is preferably 10% by weight or more based on the total amount of the ink.

A water-soluble organic solvent having a boiling point of 120 ° C. or less is often added. Examples of such an organic solvent include methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, and n. Alkyl alcohols having 1 to 4 carbon atoms such as -butyl alcohol, sec-butyl alcohol and tert-butyl alcohol; ketones or keto alcohols such as acetone; ethers such as tetrahydrofuran and dioxane; poly such as polyethylene glycol and polypropylene glycol. Alkylene glycols; ethylene glycol, propylene glycol, butylene glycol,
1,3-dimethyl-2-imidazolidinone and the like.

The recording ink and yellow ink of the present invention may further contain a nonionic, anionic or cationic surfactant.
Additives such as fungicides may be added as necessary.

Further, as another embodiment of the recording ink of the present invention, in addition to the water-soluble azopyridone dye represented by the general formula (1) and the water-soluble organic solvent as described above, An ink which contains at least a chemical conversion component and is irradiated with heat or light or both after application of the ink to form a film with the ink. Hereinafter, a recording ink having a film forming component will be described.

As the film forming component used in the recording ink of the present invention, a component which is cured by heat or light or both after application of the ink can be used. For example, a monomer component such as an acrylic or vinyl monomer that is cured by a polymerization reaction by heat or light, a polymer or a copolymer of these monomers that is cured by a dehydration condensation reaction by heat or light, or the like Is mentioned. At least one
It is preferable to use a polymerizable compound having an acrylic monomer unit represented by the following general formula (6). Specifically, it is desirable to use the monomers listed below alone and / or those containing other vinyl monomers capable of forming a copolymer with these monomers.

[0047] (In the formula, R ₁ represents a hydrogen atom or a methyl group, and R ₂ represents a hydrogen atom or an alkyl group having 4 or less carbon atoms.)

Examples of the monomer corresponding to the structural unit represented by the general formula (6) include N-methylolacrylamide, N-methoxymethylacrylamide,
-Ethoxymethylacrylamide, N-isopropoxymethylacrylamide, N-methylolmethacrylamide, N-methoxymethylmethacrylamide, N-ethoxymethylmethacrylamide, N, N-dimethylolacrylamide, N, N-dimethoxymethylacrylamide, N, N-diethoxymethylacrylamide, N, N
-Dimethylol methacrylamide, N, N-dimethoxymethyl methacrylamide, N, N-diethoxymethyl methacrylamide and the like, but are not limited thereto.

Other vinyl monomers include acrylates such as acrylic acid, methacrylic acid, methyl acrylate and ethyl acrylate, methacrylates such as methyl methacrylate and ethyl methacrylate, hydroxymethyl methacrylate and hydroxyethyl methacrylate. , Hydroxymethyl acrylate, hydroxy-containing vinyl monomers such as hydroxyethyl acrylate,
Other examples include styrene, α-methylstyrene, acrylamide, methacrylamide, acrylonitrile, allylamine, vinylamine, vinyl acetate, vinyl propionate, and the like, but are not limited thereto. The copolymerization ratio (% by weight) of the monomer and another vinyl monomer is 100%: 0% to 5%: 95%.
Is preferable, and 90%: 10% to 10%: 90% is particularly desirable.

The content of the above-mentioned film-forming component contained in the ink is preferably 0.01 to 30% by weight, particularly preferably 0.1 to 10% by weight. When light is used as a method for forming a film of the ink, various photocurable resin components and a photopolymerization initiator may be further added.

Next, a method for manufacturing a color filter (hereinafter, simply referred to as a liquid crystal color filter) used for a liquid crystal display or the like in the present invention will be described. FIG.
1 illustrates a method for manufacturing a color filter for liquid crystal according to the present invention, and illustrates an example of a configuration of the color filter for liquid crystal according to the present invention. Although 1 in FIG. 1 indicates a substrate, a glass substrate can be generally used as the substrate. However, transparency as a color filter for liquid crystal,
The material is not limited to a glass substrate as long as it has necessary characteristics such as mechanical strength.

FIG. 1A shows a glass substrate 1 on which a black matrix 2 is formed, and 7 denotes a light transmitting portion. As a method for forming a black matrix, for example, when directly provided on a substrate, a method of forming a metal thin film by sputtering or vapor deposition and patterning by a photolithography step can be mentioned, and when provided on a resin composition, a general method is used. Patterning method by a typical photolithography process. However, the present invention is not limited to these.

In the procedure shown in FIG. 1, first, a layer containing a curable resin composition is formed on the substrate 1 on which the black matrix 2 is formed, and this is cured to form the substrate 1.
An ink receiving layer 3 is formed thereon (FIG. 1B).

The ink receiving layer 3 is configured to contain a polymer having one or several kinds of acrylic monomer units as structural units. As the material for forming the ink receiving layer, it is preferable to use a material having at least a monomer unit represented by the following general formula (6). As the ink receiving layer, a polymer of acrylamide monomer alone or a corresponding polymer thereof is used. It is preferable to include a copolymer of a monomer and another vinyl monomer, or to include a plurality of such polymers.

[0055] (Wherein R ₁ and R ₂ are as defined above)

Specific examples of the monomer corresponding to the structural unit represented by the general formula (6) include N-methylolacrylamide, N-methoxymethylacrylamide, N-ethoxymethylacrylamide, and N-isopropoxy. Methyl acrylamide, N-methylol methacrylamide, N-methoxymethyl methacrylamide,
N-ethoxymethylmethacrylamide, N, N-dimethylolacrylamide, N, N-dimethoxymethylacrylamide, N, N-diethoxymethylacrylamide, N, N-dimethylolmethacrylamide, N, N-
Examples include, but are not limited to, dimethoxymethyl methacrylamide, N, N-diethoxymethyl methacrylamide, and the like.

Other vinyl monomers include acrylic acid esters such as acrylic acid, methacrylic acid, methyl acrylate and ethyl acrylate; methacrylic acid esters such as methyl methacrylate and ethyl methacrylate; hydroxymethyl methacrylate; Hydroxyl-containing vinyl-based monomers such as ethyl methacrylate, hydroxymethyl acrylate, and hydroxyethyl acrylate; styrene; α-methylstyrene; acrylamide; methacrylamide; acrylonitrile; allylamine; vinylamine; vinyl acetate; However, it is not limited to these. The copolymerization ratio between the monomer corresponding to the structural unit represented by the general formula (6) and these other vinyl monomers is desirably in the range of 95: 5 to 5:95 in molar ratio.

The ink receiving layer used in the present invention may be a mixture of a homopolymer and / or a copolymer formed as described above and another polymer compound. Examples of such a polymer compound include synthetic resins such as polyvinylpyrrolidone, polyvinyl alcohol, polyvinyl acetal, polyurethane, carboxymethyl cellulose, polyester, polyacrylic acid (ester), hydroxyethyl cellulose, hydroxypropyl cellulose, and modified products thereof. And natural resins such as albumin, gelatin, casein, starch, cationized starch, gum arabic and sodium alginate. The amount of these other high molecular compounds is 70 to the total amount of the resin constituting the ink receiving layer.
% By weight or less.

The ink receiving layer 3 may contain various additives as required. Specific examples of the additives include various surfactants, dye fixing agents (waterproofing agents),
Examples include an antifoaming agent, an antioxidant, a fluorescent brightener, an ultraviolet absorber, a dispersant, a viscosity adjuster, a pH adjuster, a fungicide, and a plasticizer. These additives may be arbitrarily selected from conventionally known ones according to the purpose.

As the method for forming the ink receiving layer, methods such as spin coating, roll coating, bar coating, spray coating, and dip coating can be used. The ink receiving layer formed by such a method is further prebaked as necessary, and then, using the R, G, and B color inks 5 containing the water-soluble dye described above, by an ink jet recording method. It is colored (FIG. 1 (c)). As the ink used for coloring, any of the dyes and pigments other than the water-soluble dyes described above can be used in combination, and also the liquid ink and the solid ink can be used, particularly in the case of the method for producing a color filter of the present invention. It is very preferable to use an aqueous ink.

In FIG. 1C, reference numeral 4 denotes an ink jet recording head, and reference numeral 5 denotes R, G and B ink droplets. As the inkjet recording method, a type using an electrothermal converter as an energy generating element,
Alternatively, a type using a piezoelectric element or the like can be used, and the coloring area and the coloring pattern can be arbitrarily set.

After the ink receiving layer is colored with each color ink as described above, the ink receiving layer 3 is cured by performing light irradiation or light irradiation and heat treatment (FIG. 1).
(D)) If necessary, a protective layer 6 is formed thereon to produce the color filter of the present invention (FIG. 1).
(E)).

As described above, the material for forming the ink receiving layer preferably used in the present invention can contain a photopolymerization initiator. In this case, the black matrix is added to the ink prior to the application of the ink. If light irradiation or light irradiation and heat treatment are applied to the corresponding non-colored portion of the ink receiving layer in advance, the ink absorbency of that portion can be reduced. By performing such a process on the ink receiving layer, it is possible to effectively prevent troubles such as color mixing and color unevenness between the pixels, which are likely to occur when forming the R, G, and B pixels by the ink jet recording method. can do. As a result, a low-cost, high-quality color filter can be manufactured.

FIG. 2 shows such a manufacturing procedure. That is, after the ink receiving layer 3 containing the photopolymerization initiator is formed on the substrate 1 (FIGS. 2A and 2B), the non-coloring portion 81 corresponding to the black matrix 2 is replaced with a photomask. 2 through a pattern exposure through the light emitting device 84 (FIG. 2).
(C), the ink absorbency of the non-colored portion of the ink receiving layer 3 is reduced.

As the photomask 84 at the time of pattern exposure, the ink receiving layer 3 corresponding to the black matrix 2 is used.
Is exposed only to the non-colored portion 81, and has an opening 90 for reducing the ink absorbency of the exposed portion. At this time, the opening width Y is slightly smaller than the width X of the black matrix 2 in consideration of the fact that it is necessary to discharge a large amount of ink in order to prevent color loss at a portion in contact with the black matrix 2. It is preferable to use a mask. Thus, the width of the non-coloring portion 81 formed on the ink receiving layer 3 is smaller than the width of the black matrix 2. The subsequent steps (FIGS. 2D and 2E) are the same as in the case of FIG. 1 (FIGS. 1C to 1C).
(E)) By doing so, a color filter is produced.

In the above-described method, the light irradiating means for irradiating the ink receiving layer 3 with light and forming a layer (non-coloring portion) 81 having reduced ink absorbability in that portion is not particularly limited. However, in the present invention, Deep-
UV light is preferable, and light irradiation conditions are 1 to 3000 mJ / cm.
It should be about ² . The heat treatment is performed by means such as an oven and a hot plate, and the temperature condition is 50 ° C or more.
It may be performed at 180 ° C. for 10 seconds to 20 minutes. Hereinafter, a photopolymerization initiator capable of imparting the ink receiving layer 3 at that portion with the ability to reduce the ink absorbability by light irradiation as described above will be described.

The photopolymerization initiator used in the present invention is not particularly limited. For example, onium salts and halogenated triazine compounds are preferably used. More specifically, as onium salts, triphenylsulfonium hexafluoroantimonate, triphenylsulfonium tetrafluoroborate, triphenylsulfonium hexafluorophosphate, triphenylsulfonium trifluoromethylsulfonate and derivatives thereof, and further diphenyliodonium hexafluoro Examples include antimonate, diphenyliodonium tetrafluoroborate, diphenyliodonium hexafluorophosphate, diphenyliodonium trifluoromethylsulfonate, and derivatives thereof. Among these, a halogenated triazine compound is particularly preferably used. However, it is not limited to them. Further, derivatives and the like of the above-mentioned compounds can be used, but it is a matter of course that the present invention is not limited to these derivatives and the like.

The amount of the photopolymerization initiator as mentioned above is based on the weight of the above-mentioned ink receiving layer material.
The content is 0.01 to 20%, preferably 0.1 to 10%.
Further, a compound such as perylene or anthracene may be added as a sensitizer.

Next, a method of manufacturing a color filter using the recording ink of the present invention containing a film-forming component as described above will be described with reference to FIG. First, in this case, as shown in FIG.
It is preferable to use a substrate provided with a black matrix 2 as the substrate 1. Specifically, an ink-mixing prevention wall can be formed by forming a matrix having ink repellency on a non-colored portion of the substrate. Examples of a method for forming a matrix having ink repellency on a non-colored portion of a substrate that can be used in the present invention include, for example, a transparent substrate or a substrate having a black matrix, which is transparent or exhibits ink repellency when cured. There is a method in which a black, positive-type or negative-type photoresist is used and is processed so that a resist pattern is left in a non-colored portion. At this time, when a transparent photoresist is used, it is expected that an accurate ink-repellent wall is formed on the substrate. When a black photoresist is used, it is not necessary to separately provide a black matrix, so that the process can be shortened. When each resist is used, a portion having ink repellency may be further formed on the upper portion (not shown).

Next, a recording ink having the film forming component of the present invention of each color of R, G, and B is applied to the colored region of the substrate using an ink jet head.
Alternatively, a colored pixel is formed by forming a film with both of them (FIG. 3B). In FIG. 3, reference numeral 4 denotes an ink jet head, and reference numeral 5 denotes each of R, G, and B ink droplets. As the inkjet recording method, a type using an electrothermal converter as an energy generating element,
Alternatively, a type using a piezoelectric element or the like can be used, and the coloring area and the coloring pattern can be arbitrarily set. Next, light irradiation or heat treatment, or light irradiation and heat treatment is performed to form a film on the ink applied on the substrate (FIG. 3).
(C)) If necessary, a protective layer 6 is laminated thereon to complete a color filter (FIG. 3D). The color filter of the present invention, which is excellent in characteristics, is economically completed by the method described above.

FIG. 4 is a sectional view of a TFT color liquid crystal panel incorporating the color filter of the present invention obtained as described above. The color liquid crystal panel is formed by aligning the substrate 14 facing the color filter 9 and sealing the liquid crystal composition 12 therebetween. A TFT (not shown) and a transparent pixel electrode 13 are formed in a matrix inside one substrate of the liquid crystal panel. A color filter 9 is provided inside the other substrate 1 at a position facing the pixel electrode, and a transparent counter (common) electrode 10 is formed on one surface of the color filter 9.

Further, an alignment film 11 is formed in the plane of both substrates, and by subjecting this to a rubbing treatment, liquid crystal molecules can be aligned in a certain direction. A polarizing plate 15 is adhered to the outside of each glass substrate, and the liquid crystal compound is filled in the gap (about 2 to 5 μm) between these glass substrates. As the light source of the backlight 16, a combination of a fluorescent lamp and a scattering plate (both not shown) is used. Display is performed by making the liquid crystal compound function as an optical shutter that changes the transmittance of the backlight light.

[0073]

EXAMPLES Hereinafter, each embodiment of the present invention will be described in more detail with reference to Examples and Comparative Examples. In the following description, “%” or “parts” is based on weight unless otherwise specified. [Examples 1 to 12] On a glass substrate provided with a black matrix made of chromium having openings of 60 to 150 μm in size, N-methylolacrylamide and hydroxyethyl methacrylate (5
(0:50 (weight ratio)), and spin-coated with a curable resin composition having a thickness of 1.2 μm.
Prebaking was performed at 20 ° C. for 20 minutes to form an ink receiving layer.

On the other hand, as the dye for the G ink, the azopyridone dye 1 of each of the above-described exemplified yellow dyes a to c and the phthalocyanine dye 2 of the above-described exemplified blue dyes a and b were used. Formulation Examples AG1 to AG6 shown in Table 1
A combination of AR1 to AR6 using the two azopyridone dyes 1 of the exemplary yellow dyes a to c and the xanthene dye 2 as dyes for the R ink, similarly prepared as the following formula 1. Twelve types of G and R inks were prepared.

Ink formulation 1 (G and R) Dye 1 3% Dye 2 3% Ethylene glycol monobutyl ether (bp 170 ° C.) 39% Ethyl alcohol (bp 78 ° C.) 6% 49% water

[0076]

The B ink used simultaneously is CI
Using Acid Blue 83 as a dye, it was prepared as in Formula 1 below. Ink formula 1 (B) Dye 5.7% Ethylene glycol monobutyl ether (bp 170 ° C) 39% Ethyl alcohol (bp 78 ° C) 6% Water 49.3%

Next, using the R, G, and B inks obtained above, each ink was applied to a position where an image of each color of the ink receiving layer formed on the substrate as described above was to be formed by an ink jet printer. Was applied, and the RGB matrix pattern was colored. Next, baking is performed at 230 ° C. for 50 minutes to further advance the curing reaction of the ink receiving layer, and after drying, a two-component acrylic thermosetting resin material (trade name: SS-7625 (trade name)) Nippon Synthetic Rubber Co., Ltd.)) is spin-coated to a thickness of 1 μm,
The liquid crystal color filter of Example 1 was prepared by forming a protective layer by performing a heat treatment at 240 ° C. for 20 minutes to cure.

Thereafter, the same procedure as described above was conducted except that the G ink of Formulation Example AG1 was replaced with the G ink of Formulation Examples AG2 to AG6, and the R ink of AR1 was sequentially replaced with R ink of AR2 to AR6. The liquid crystal color filters of Examples 2 to 12 were prepared, and the liquid crystal color filters of Examples 1 to 12 were evaluated by the following evaluation methods.

<Evaluation Method> (Evaluation 1: Transparency of Colored Part)
A liquid crystal panel was created using each of the 12 color filters,
For the dye set represented by AG, the G pattern part
With respect to the dye set represented by AR, the transparency of the R pattern portion was visually observed and evaluated as follows. A: Transparency is good. B: Transparency is slightly inferior. C: Inferior in transparency and dull.

(Evaluation 2: Heat Resistance) Each of the color filters of Examples 1 to 12 obtained above was placed in an oven at 230 ° C. for 1 hour.
ΔE (metr) in which the magnitude of the discoloration of the G pattern portion for the dye set represented by AG and the magnitude of the discoloration of the R pattern portion for the dye set represented by AR was determined by CIE.
and calculated according to the following criteria. When ΔE is 3 or less, almost no discoloration is observed. If ΔE is more than 3 and 10 or less, discoloration and discoloration are slightly observed. When ΔE is 10 or more, discoloration and fading are clearly recognized. A: ΔE is 3 or less. B: ΔE is more than 3 and 10 or less. C: ΔE is larger than 10.

(Evaluation 3: Light fastness) Xenon light was applied to the above color filter for 50 hours using a fade meter Ci35 manufactured by Atlas Co., Ltd. For the dye set, the magnitude of the discoloration in the R pattern portion was calculated as ΔE determined by CIE, and evaluated according to the following criteria. A: ΔE is 3 or less. B: ΔE is more than 3 and 10 or less. C: ΔE is larger than 10.

(Evaluation 4: Ejection Stability) The inks of Examples 1 to 12 were loaded in BJ-10V, and 300 character patterns were printed on A4 paper. The 300th printed A4 sheet was visually observed and evaluated according to the following criteria. A: No problem at all. B: Slight blurring occurred. C: Almost no ejection.

[0084]

Comparative Examples 1 to 12 The same as Examples 1 to 12 except that the dyes 1 and 2 in the G and R inks were replaced with the dyes 1 and 2 shown in Table 3 Thus, the liquid crystal color filters of Comparative Examples 1 to 12 were prepared. Then, the obtained liquid crystal color filter and the G ink used were evaluated in the same manner as in Examples 1 to 12, and the evaluation results are shown in Table 4.

[0086]

[0087]

[Examples 13 to 24] First, a black pigment resist CK-S17 manufactured by Fuji Hunt Co., Ltd. was formed on a glass substrate.
1B was applied by a spin coating method, and thereafter, a black matrix having a thickness of 1.0 μm was formed on the substrate by exposure, development, and heat treatment.

Next, with an ink jet printer,
R, G, and B inks were ejected to the openings of the black matrix, and the inks were formed into a film by a heat treatment at 230 ° C. for 30 minutes to form a color filter for a liquid crystal element.
As each ink, a recording ink having a film-forming component prepared as follows was used. That is, the following dyes were used, and the respective ink compositions were ink formulation 2 (G) and ink formulation 2 (R,
As shown in B).

Dye of R ink: Dye described in formulation example shown in Table 1 Dye of B ink: Dye of CI Acid Blue 83 G ink: Dye described in formulation example shown in Table 1

[0091]

[0092]

<Evaluation Method> (Evaluation 1: Transparency of Colored Part) Example 13 prepared above
A liquid crystal panel was prepared using each of the color filters No. to No. 24, and the transparency of the R pattern portion was visually observed for the dye set represented by AG and the R pattern portion for the dye set represented by AR. Was evaluated according to the following criteria. Table 5 shows the evaluation results. A: Transparency is good. B: Transparency is slightly inferior. C: Transparency is poor and dull.

(Evaluation 2: Heat Resistance) The color filters of Examples 13 to 24 prepared above were placed in an oven at 250 ° C. for 1 hour.
The dye set represented by AG was left for a time, and the magnitude of the discoloration of the G pattern portion was calculated for the dye set represented by AG, and the magnitude of the discoloration of the R pattern portion was calculated as ΔE determined by CIE for the dye set represented by AR. evaluated. Table 5 shows the evaluation results. A: ΔE is 3 or less. B: ΔE is more than 3 and 10 or less. C: ΔE is larger than 10.

(Evaluation 3: Light fastness) Using the Atlas Co. fade meter Ci35, the above-prepared Examples 13 to
Illuminate the 24 color filters with xenon light for 50 hours,
For the dye set represented by AG, the G pattern part
For the dye set represented by AR, the magnitude of the discoloration of the R pattern portion was calculated as ΔE determined by CIE, evaluated according to the following criteria, and evaluated according to the following criteria. Table 5 shows the evaluation results. A: ΔE is 3 or less. B: ΔE is more than 3 and 10 or less. C: ΔE is larger than 10.

(Evaluation 4: Ejection Stability) The inks of Examples 13 to 24 prepared as described above were loaded into BJ-10V, and A4
300 character patterns were printed on paper. 300
The printed A4 sheet was visually observed and evaluated according to the following criteria. Table 5 shows the evaluation results. A: No problem at all. B: Slight blurring occurred. C: Almost no ejection.

[0097]

Comparative Examples 13 to 24 In Examples 13 to 24, formulation examples AG1 to AG6 and AR1 shown in Table 1
To AR6, were prepared according to Formulation Examples AG101 to G106 in Table 3.
Color filters of Comparative Examples 13 to 24 were produced under exactly the same conditions except that the dyes AR101 to AR106 were used. Then, the obtained color filter and the G ink used were evaluated in the same manner as in Examples 13 to 24. Table 6 shows the evaluation results.

[0099]

(Examples 25 to 33 and Comparative Examples 25 to 2)
7) Y (yellow) ink prepared according to Formulation 3 below using dyes described in Formulation Examples B1 to B12 in Table 7 below,
The G (green) ink and the R (red) ink were loaded into an inkjet printer BJC-620 manufactured by Canon Inc., and a solid pattern was printed on an OHP film CF-102 manufactured by Canon Inc. Then, for the obtained recorded image,
Each evaluation was performed. B1 to B3 and B10 are Y inks,
B4 to B6 and B11 are G inks, and B7 to B9 and B11 are R inks. B10 is Comparative Example 25,
B11 is Comparative Example 26, and B12 is Comparative Example 27.

[0101]

[0102]

<Evaluation Method> (Evaluation 1: OHP Suitability) A recorded image is projected on a screen by OHP and visually observed to make a judgment. The recording portion is bright, the optical density of the recorded image is high, the contrast is high, and the image is clear. A is obtained when an easily viewable projected image is obtained, B is a case where the density of the recording portion is slightly lower and observed dark, and C is a case where the recording portion is clearly dark, the optical density is low and lacks in definition, Table 8 shows the results.

(Evaluation 2: Solid uniformity) Beading was clearly observed in the projected image or visually, C was observed when unevenness was conspicuous, B was observed when slight beading occurred, and B was not observed at all. A sample without unevenness was designated as A, and the results are shown in Table 8. Here, beading means that when the ink has fluidity before being fixed to the ink receiving layer,
Dots move irregularly in the surface direction of the ink receiving layer surface,
This is a phenomenon in which an aggregate of adjacent dots and new dots is formed to cause density unevenness in a recorded image.

(Evaluation 3: Image Storage Property)
Images recorded on the respective recording media using the above-described printer were stored in an environment of 35 ° C. and 90% RH for 7 days, and evaluated by comparing with the images before storage. A: no change in image quality compared to the image before storage; B: one in which ink spread, bleeding, character thickening occurred, and image quality deterioration was recognized, and the results are shown in Table 8. .

[0106]

[0107]

As described above, according to the present invention,
By using a specific water-soluble azopyridone-based dye, a recording ink can be provided which has a high level of transparency, bleeding, adhesion to a substrate, and dischargeability as an ink at a high level. Further, according to the present invention, by using such an ink, a color filter which is excellent in heat resistance, cleaning resistance and adhesion to a substrate, and has high color contrast and color purity without bleeding particularly in a colored portion of a green pixel. It can be manufactured economically, and an excellent liquid crystal panel can be manufactured using the color filter.
Further, according to the present invention, a recording ink that is also effective as an application other than a color filter, and is also suitable as an ink for office and industrial printers and a yellow ink particularly suitable for forming a yellow image observed by transmitted light Is provided.

[Brief description of the drawings]

FIG. 1 is a process chart showing an example of a procedure for manufacturing a color filter according to the present invention.

FIG. 2 is a process chart showing another example of a procedure for manufacturing a color filter according to the present invention.

FIG. 3 is a process chart showing another example of a procedure for manufacturing a color filter according to the present invention.

FIG. 4 is a schematic sectional view showing an example of a liquid crystal panel incorporating the color filter of the present invention.

[Explanation of symbols]

 1: Substrate 2: Black matrix 3: Ink receiving layer 4: Ink jet head 6: Protective layer 7: Light transmitting portion 9: Color filter 10: Common electrode 11: Alignment film 12: Liquid crystal composition 13: Pixel electrode 14: Substrate 15 : Polarizing plate 16: Backlight 17: Ink color mixing prevention wall 81: Non-coloring portion 84: Photomask 90: Opening

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09B 35/378 CLA C09B 47/18 47/18 47/26 47/26 G02B 5/20 101 G02B 5/20 101 G03F 7/004 505 G03F 7/004 505 B41J 3/04 101Y 101Z (72) Inventor Yoshihisa Yamashita 3-30-2 Shimomaruko, Ota-ku, Tokyo F-term (reference) in Canon Inc. 2C056 EA11 EA13 FB01 FC02 HA41 2H025 AB13 CC11 2H048 BA47 BA64 BB02 BB24 BB44 2H086 BA01 BA02 BA05 BA15 BA18 BA31 BA52 BA53 BA56 BA60 BA62 4J039 AD03 AD08 AD09 AD10 AD11 AD12 BC05 BC07 BC09 BC12 BC13 BC16 BC19 BC29 BC31 BC33 BC36 BC42 BC44 BC47 BC50 BC50 BC50 BE06 BE12 EA03 EA05 EA15 EA16 EA20 GA24

Claims (23)

[Claims] 1. A recording ink comprising at least a water-soluble azopyridone dye represented by the following general formula (1) and a water-soluble organic solvent. (Wherein A and B independently represent a hydrogen atom, a halogen atom, a nitro group, an amino group, a phosphon group, a sulfone group, a sulfamide group, a carboxyl group, a trifluoromethyl group, an alkyl group having 4 or less carbon atoms, The following alkoxy groups,
Represents an aryl group which may have any of the above substituents, or a salt group of these groups, and X represents a hydrogen atom, a methyl group,
A carboxyl group, a trifluoromethyl group, or a salt group of these groups, Y represents a hydrogen atom, a cyano group, an aminocarbonyl group, a sulfone group, a sulfomethyl group, or a salt group of these groups; It represents an alkyl group having 6 or less carbon atoms, and at least one of A, B and Y represents a sulfone group, a sulfomethyl group or a salt group of these groups. ) 2. The recording ink according to claim 1, further comprising a phthalocyanine dye represented by the following general formula (2). (Wherein R _{1 to} R ₄ are each independently a hydrogen atom, a halogen atom, a hydroxyl group, a sulfone group, a sulfamide group, a carboxyl group, an alkyl group having 5 or less carbon atoms, an alkoxy group having 5 or less carbon atoms, An aryl group optionally having any of the above substituents, a phenoxy group optionally having any of the above substituents, a thiophenoxy group optionally having any of the above substituents, or a salt of these groups. And M represents 2
Hydrogen atom, two sodium atoms, two lithium atoms, a divalent metal or a trivalent or tetravalent metal derivative, and at least two or more sulfone groups or salts thereof in the structure Have. ) 3. The water-soluble azopyridone dye and the phthalocyanine dye in a weight ratio of 3: 1 to 3: 1.
3. The recording ink according to claim 2, which is contained in a ratio of 1: 3 and is prepared for a green color tone. 4. The recording ink according to claim 1, further comprising a xanthene dye represented by the following general formula (3). (Wherein, Z _{1 to} Z ₇ each independently represent a hydrogen atom or a halogen atom, Y ₁ represents a sulfone group, a carboxyl group, a sulfamide group, a carboxamide group or a salt group of these groups, and Y ₂ represents a hydrogen atom X ₁ represents an atom, a sulfone group, a sulfamide group or a salt thereof, and X ₁ represents a group having any of the structures represented by the following general formula (4).
₂ represents a group having any of the structures described in the following general formula (5). ) (Wherein R _{1 to} R ₄ each independently represent, as a substituent, a hydrogen atom, an alkyl group having 6 or less carbon atoms, an alkyl group having 4 or less carbon atoms, a sulfone group, or a salt group of these groups. Represents an aryl group.) 5. The water-soluble azopyridone dye and the xanthene dye in a weight ratio of 3: 1 to 1: 3.
The recording ink according to claim 4, wherein the recording ink is contained in the range described above and prepared for a red color tone. 6. The ink according to claim 1, wherein at least one of the water-soluble organic solvents contained in the ink has a boiling point of 120 ° C. or more, and the content in the ink is 10% by weight or more.
6. The recording ink according to any one of items 1 to 5. 7. The recording ink according to claim 1, further comprising a film-forming component, and being formed by irradiating heat or light or both after application of the ink. . 8. The recording ink according to claim 7, wherein the film-forming component contains at least one kind of acrylic monomer or a polymer having an acrylic monomer unit, a vinyl monomer or a polymer having a vinyl monomer unit. 9. The recording ink according to claim 8, wherein one of the acrylic monomer units is represented by at least the following general formula (6). (In the formula, R ₁ represents a hydrogen atom or a methyl group, and R ₂ represents a hydrogen atom or an alkyl group having 4 or less carbon atoms.) 10. The recording ink according to claim 1, wherein the recording ink is an ink jet ink. 11. An ink jet recording method comprising performing ink jet recording using the recording ink according to claim 10. 12. A method for manufacturing a color filter, comprising a step of forming a plurality of colored pixels using the recording ink according to claim 1. Description: 13. The method for manufacturing a color filter according to claim 12, wherein the step of forming the colored pixels includes a step of applying ink on a substrate by using an ink jet recording method. 14. The method of forming a colored pixel, comprising: applying an ink to an ink receiving layer containing a polymer having one or several acrylic monomer units by using an inkjet method; The method for producing a color filter according to claim 12, further comprising a step of curing. 15. The method according to claim 15, wherein one of the acrylic monomer units is
The method for producing a color filter according to claim 14, which is represented by at least the following general formula (6). (In the formula, R ₁ represents a hydrogen atom or a methyl group, and R ₂ represents a hydrogen atom or an alkyl group having 4 or less carbon atoms.) 16. The method for producing a color filter according to claim 14, wherein the ink receiving layer contains a photopolymerization initiator. 17. The ink-receiving layer according to claim 1, wherein the non-colored portion of the ink-receiving layer is partially cured by light irradiation or a combination of light irradiation and heat treatment prior to ink application. 17. The method for manufacturing a color filter according to claim 16, wherein 18. A step of applying the recording ink according to claim 7 on a substrate, and a step of forming a colored pixel by forming a film of the ink applied on the substrate. A method for manufacturing a color filter, comprising: 19. The step of applying the recording ink,
19. The method for manufacturing a color filter according to claim 18, wherein the method is performed using an inkjet method. 20. The method for manufacturing a color filter according to claim 18, wherein the substrate is a substrate provided with an ink color mixing prevention wall. 21. A color filter manufactured by the method for manufacturing a color filter according to claim 12. Description: 22. A method for manufacturing a liquid crystal display panel, comprising using the color filter according to claim 21. 23. A liquid crystal display panel using the color filter according to claim 21.