KR20230127052A - Colored Photosensitive Resin Composition for Green Pixel, Color Filter and Display Device - Google Patents

Abstract

The present invention includes a colorant, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator, and a solvent, wherein the colorant includes a green pigment and another pigment, and the mixing ratio of the green pigment and the other pigment is 40:60 by weight. to 15:85, a colored photosensitive resin composition for green pixels, a color filter and an image display device manufactured using the same. The colored photosensitive resin composition for green pixels according to the present invention has excellent luminance and contrast characteristics.

Description

Colored Photosensitive Resin Composition for Green Pixel, Color Filter and Display Device

The present invention relates to a colored photosensitive resin composition for a green pixel, a color filter, and an image display device, and more particularly, a colored photosensitive resin composition for a green pixel that can be applied to AR/VR technology by improving the luminance and contrast characteristics of a pixel. , It relates to a color filter formed using the same and an image display device having the color filter.

Recently, Augmented Reality (AR), a system that allows you to experience famous tourist destinations without traveling long distances, become a main character in a game and travel through a virtual world, and practice dangerous training safely, is a reality-based augmented reality and virtual reality. (Virtual Reality, VR) technology. This AR/VR technology is a means to overcome the limitations of time and space and provide an opportunity to experience another reality.

The technologies needed to implement such AR/VR are “micro displays,” optical engines, sensors, semiconductors, communications, and batteries. Among them, the core performance of micro-displays that project images is pixel density, that is, resolution (pixel size), brightness, and driving speed.

AR/VR devices must support brightness (luminance) of 1000 nits or higher, resolution of 60 ppd (pixels per degree) or higher, and screen refresh rate of 120 Hz or higher. The higher the resolution, the more detailed the virtual image can be seen, and the higher the refresh rate, the lower the latency.

Micro displays include micro organic light emitting diodes (OLEDs) and micro light emitting diodes (LEDs).

Micro OLED technology has already been established to the extent that it is already being used in camera viewfinders, but to expand its application to AR/VR, the luminance and contrast characteristics must be improved. Micro OLED mainly uses a color filter (CF) method for a white light emitting layer. In this method, the luminance loss due to the color filter is large, so it is disadvantageous to increase luminance.

In Korean Patent Publication No. 10-2010-0121551, CI with high transmittance and contrast ratio as a colorant for green pixels. A colored photosensitive resin composition using Pigment Green 58 is disclosed.

However, these colored photosensitive resin compositions have limitations in improving luminance and contrast characteristics when applied to AR/VR technology.

Republic of Korea Patent Publication No. 10-2010-0121551

One object of the present invention is to provide a colored photosensitive resin composition for green pixels that can be applied to AR/VR technology by improving the luminance and contrast characteristics of pixels.

Another object of the present invention is to provide a color filter formed by using the colored photosensitive resin composition for a green pixel.

Another object of the present invention is to provide an image display device having the color filter.

On the one hand, the present invention includes a colorant, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator and a solvent,

The colorant includes a green pigment and other pigments,

Provided is a colored photosensitive resin composition for a green pixel in which a mixing ratio of the green pigment and other pigments is 40:60 to 15:85 by weight.

In one embodiment of the present invention, the green pigment is C.I. It may be at least one selected from Pigment Green 58 and 36.

In one embodiment of the present invention, the other pigment is C.I. It may be at least one selected from Pigment Yellow 138, 139 and 150.

In one embodiment of the present invention, the content of the colorant may be 5 to 50% by weight based on 100% by weight of the total solid content in the colored photosensitive resin composition.

On the other hand, the present invention provides a color filter formed using the colored photosensitive resin composition for green pixels.

On the other hand, the present invention provides an image display device characterized in that the color filter is provided.

The colored photosensitive resin composition for a green pixel according to the present invention can be advantageously used for AR/VR because it can improve the luminance and contrast characteristics of a pixel by including a green pigment with other pigments in a specific mixing ratio.

Hereinafter, the present invention will be described in more detail.

One embodiment of the present invention includes a colorant (A), an alkali-soluble resin (B), a photopolymerizable compound (C), a photopolymerization initiator (D) and a solvent (E), wherein the colorant is a green pigment and other pigments. It relates to a colored photosensitive resin composition for a green pixel, wherein the mixing ratio of the green pigment and other pigments is 40:60 to 15:85 by weight.

Colorant (A)

In one embodiment of the present invention, the colorant (A) includes a green pigment and other pigments.

pigment (a1)

In one embodiment of the present invention, the green pigment may include green organic pigments and/or inorganic pigments generally used in the field.

The green organic pigment and/or inorganic pigment may specifically include a compound classified as a pigment in the color index (published by The Society of Dyers and Colourists), and more specifically, the following color index (C.I.) numbers Although the pigment of can be mentioned, it is not necessarily limited to these.

C.I. Pigment Green 7, 10, 15, 25, 36, 47, 58, 59, 62 and 63.

The green pigments may be used alone or in combination of two or more.

In particular, C.I. At least one selected from Pigment Green 58 and 36 may be used, and in particular, C.I. Pigment Green 36 is more preferable in terms of pixel luminance.

In one embodiment of the present invention, the colorant may further include other pigments in addition to the green pigment to control color tone and improve luminance and contrast characteristics of pixels.

In one embodiment of the present invention, conventionally known inorganic pigments and/or organic pigments may be used as the other pigments.

In particular, the other pigment may include a yellow pigment.

The yellow pigment may include yellow organic pigments and/or inorganic pigments generally used in the field.

The yellow organic pigment and/or inorganic pigment may specifically include a compound classified as a pigment in the color index (published by The Society of Dyers and Colourists), and more specifically, the following color index (C.I.) numbers Although the pigment of can be mentioned, it is not necessarily limited to these.

C.I. Pigment Yellow 13, 20, 24, 31, 53, 83, 86, 93, 94, 109, 110, 117, 125, 129, 137, 138, 139, 147, 148, 150, 153, 154, 166, 173 , 180 and 185.

The yellow pigments may be used alone or in combination of two or more.

In particular, among the yellow pigments exemplified above, C.I. At least one pigment selected from Pigment Yellow 138, 139 and 150 may be preferably used in terms of brightness and contrast characteristics of pixels, and C.I. Pigment Yellow 138 can be used more preferably in terms of luminance of pixels.

In one embodiment of the present invention, the mixing ratio of the green pigment and other pigments is controlled to be 40:60 to 15:85, preferably 35:65 to 20:80 by weight. In the mixing ratio, when the content of the green pigment is less than the lower limit, desired color coordinates cannot be obtained, and when it is greater than the upper limit, desired transmittance is difficult to obtain, and luminance decreases or desired color coordinates cannot be obtained.

As the pigment, it is preferable to use a pigment dispersion in which the particle size of the pigment is uniformly dispersed. As an example of a method for uniformly dispersing the particle size of the pigment, a method of dispersing treatment by containing a pigment dispersant (a2) may be mentioned. According to the above method, a pigment dispersion in which the pigment is uniformly dispersed in a solution can be obtained. there is.

Pigment Dispersant (a2)

The pigment dispersant (a2) is added to maintain the deagglomeration and stability of the pigment, and specific examples of the pigment dispersant include surfactants such as cationic, anionic, nonionic, amphoteric, polyester, and polyamine surfactants. These can be used individually or in combination of 2 or more types, respectively.

In addition, it is preferable to include an acrylate-based dispersant (hereinafter referred to as an acrylate-based dispersant) including butyl methacrylate (BMA) or N,N-dimethylaminoethyl methacrylate (DMAEMA). Commercially available products of the acrylate-based dispersant include DISPER BYK-2000, DISPER BYK-2001, DISPER BYK-2070 or DISPER BYK-2150, and the acrylate-based dispersant may be used alone or in combination of two or more. can

As the pigment dispersant (a2), other resin-type pigment dispersants may be used in addition to the above acrylate-based dispersants. The other resin-type pigment dispersants include known resin-type pigment dispersants, particularly polycarboxylic acid esters represented by polyurethanes and polyacrylates, unsaturated polyamides, polycarboxylic acids, and (partial) polycarboxylic acids. Amine salts, ammonium salts of polycarboxylic acids, alkylamine salts of polycarboxylic acids, polysiloxanes, long-chain polyaminoamide phosphate salts, esters of hydroxyl group-containing polycarboxylic acids and their modified products, or free ) an oily dispersant such as an amide formed by reaction of a polyester having a carboxyl group with a poly(lower alkyleneimine) or a salt thereof; water-soluble resins or water-soluble polymer compounds such as (meth)acrylic acid-styrene copolymer, (meth)acrylic acid-(meth)acrylate ester copolymer, styrene-maleic acid copolymer, polyvinyl alcohol or polyvinyl pyrrolidone; Polyester; modified polyacrylate; adducts of ethylene oxide/propylene oxide and phosphate esters; and the like.

Commercially available resin type dispersants are cationic resin dispersants, for example, trade names of BYK (Big) Chemistry: DISPER BYK-160, DISPER BYK-161, DISPER BYK-162, DISPER BYK-163, DISPER BYK- 164, DISPER BYK-166, DISPER BYK-171, DISPER BYK-182, DISPER BYK-184; BASF brand names: EFKA-44, EFKA-46, EFKA-47, EFKA-48, EFKA-4010, EFKA-4050, EFKA-4055, EFKA-4020, EFKA-4015, EFKA-4060, EFKA-4300, EFKA- 4330, EFKA-4400, EFKA-4406, EFKA-4510, EFKA-4800; Trade names of Lubrizol: SOLSPERS-24000, SOLSPERS-32550, NBZ-4204/10; Trade names of Kawaken Fine Chemical Co.: HINOACT T-6000, HINOACT T-7000, HINOACT T-8000; Trade names of Ajinomoto: AJISPUR PB-821, AJISPUR PB-822, AJISPUR PB-823; Trade names of Kyoeisha Chemical Co., Ltd.: FLORENE DOPA-17HF, FLORENE DOPA-15BHF, FLORENE DOPA-33, FLORENE DOPA-44 and the like.

In addition to the above acrylic dispersant, other resin type pigment dispersants may be used alone or in combination of two or more, and may be used in combination with an acrylic dispersant.

The content of the pigment dispersant (a2) is 5 to 60 parts by weight, preferably 15 to 50 parts by weight, based on 100 parts by weight of the pigment (a1). If the content of the pigment dispersant (a2) exceeds 60 parts by weight, viscosity may increase, and if it is less than 5 parts by weight, it may be difficult to atomize the pigment or may cause problems such as gelation after dispersion.

Dye (a3)

In one embodiment of the present invention, the colorant (A) may further include a dye (a3) generally used in the art.

The dye (a3) may be additionally used without limitation as long as it has solubility in organic solvents. Preferably, it is preferable to use a dye capable of securing reliability such as solubility in an alkaline developing solution, heat resistance, and solvent resistance while having solubility in organic solvents. As the dye, acid dyes having an acid group such as sulfonic acid or carboxylic acid, salts of acid dyes and nitrogen-containing compounds, sulfonamides of acid dyes, and derivatives thereof may be used. Acid dyes of the system and their derivatives can also be selected. Preferably, the dye may be a compound classified as a dye in the color index (published by The Society of Dyers and Colourists) or a known dye described in a dyeing note (dyed yarn).

Specific examples of the dye include,

C.I. As a solvent dye,

C.I. yellow dyes such as Solvent Yellow 4, 14, 15, 16, 21, 23, 24, 38, 56, 62, 63, 68, 79, 82, 93, 94, 98, 99, 151, 162, 163;

C.I. Among solvent dyes, C.I. Solvent Yellow 14, 16, 21, 56, 151, 79, 93 are preferred, with dual C.I. Solvent Yellow 21, 79 are more preferred.

Also, C.I. C.I. Acid Yellow 1, 3, 7, 9, 11, 17, 23, 25, 29, 34, 36, 38, 40, 42, 54, 65, 72, 73, 76, 79, 98, 99, 111, 112, 113, 114, 116, 119, 123, 128, 134, 135, 138, 139, 140, 144, 150, 155, 157, 160, 161, 163, 168, 169, 172, 177, 1 78, 179, 184, 190, 193, 196, 197, 199, 202, 203, 204, 205, 207, 212, 214, 220, 221, 228, 230, 232, 235, 238, 240, 242, 243, 2 51st The yellow dye of , etc. are mentioned. Among the acid dyes, C.I. acid yellow having excellent solubility in organic solvents is preferred.

Also as a C.I. direct dye,

C.I. Direct Yellow 2, 33, 34, 35, 38, 39, 43, 47, 50, 54, 58, 68, 69, 70, 71, 86, 93, 94, 95, 98, 102, 108, 109, 129 , yellow dyes such as 136, 138, and 141.

Also, C.I. as modanto dye

yellow dyes such as C.I. Modanto Yellow 5, 8, 10, 16, 20, 26, 30, 31, 33, 42, 43, 45, 56, 61, 62, 65; and the like.

These dyes (a3) may be used alone or in combination of two or more.

The colorant (A) may be included in an amount of 5 to 50% by weight, preferably 10 to 30% by weight, based on 100% by weight of the total solid content in the colored photosensitive resin composition for green pixels. When the colorant is included in the above range, the color density of the pixels is sufficient even when a thin film is formed, and the omission of non-pixel parts is not reduced during development, so residues tend to be less likely to occur, which is preferable.

Alkali-soluble resin (B)

In one embodiment of the present invention, the alkali-soluble resin (B) usually has reactivity and alkali solubility by the action of light or heat, and acts as a dispersion medium for coloring materials. The alkali-soluble resin (B) contained in the colored photosensitive resin composition of the present invention acts as a binder resin for the colorant (A), and any binder resin soluble in an alkaline developer used in the developing step for the production of a color filter can be used. can

In particular, the alkali-soluble resin (B) includes a repeating unit containing a (meth)acryloyl group at the terminal in that it can improve photocurability and improve brightness and contrast characteristics of pixels when used together with the above-described specific pigment. Alkali-soluble resins are preferred.

The alkali-soluble resin containing a repeating unit having a (meth)acryloyl group at the terminal further comprises a (meth)acrylate monomer having an epoxy group in a copolymer of a carboxyl group-containing monomer and another monomer copolymerizable with the monomer. The copolymer obtained by making it react, etc. are mentioned.

Examples of the carboxyl group-containing monomer include unsaturated carboxylic acids such as unsaturated monocarboxylic acids, unsaturated dicarboxylic acids, and unsaturated polycarboxylic acids having one or more carboxyl groups in a molecule such as unsaturated tricarboxylic acids. can be heard Here, examples of unsaturated monocarboxylic acids include acrylic acid, methacrylic acid, crotonic acid, α-chloroacrylic acid, and cinnamic acid. As unsaturated dicarboxylic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid, mesaconic acid etc. are mentioned, for example.

An acid anhydride may also be sufficient as an unsaturated polyhydric carboxylic acid, and maleic acid anhydride, itaconic acid anhydride, a citraconic acid anhydride, etc. are mentioned specifically. In addition, the unsaturated polyhydric carboxylic acid may also be its mono(2-(meth)acryloyloxyalkyl) ester, for example mono(2-acryloyloxyethyl) succinate, mono(2-methacryloyl) succinate oxyethyl), phthalic acid mono(2-acryloyloxyethyl), phthalic acid mono(2-methacryloyloxyethyl), and the like. The unsaturated polyhydric carboxylic acid may be a mono(meth)acrylate of a dicarboxylic polymer at both terminals thereof, and examples thereof include ω-carboxypolycaprolactone monoacrylate and ω-carboxypolycaprolactone monomethacrylate. . These carboxyl group-containing monomers can be used individually or in mixture of 2 or more types, respectively.

As another monomer copolymerizable with the carboxyl group-containing monomer, for example

Styrene, vinyltoluene, α-methylstyrene, p-chlorostyrene, o-methoxystyrene, m-methoxystyrene, p-methoxystyrene, o-vinylbenzylmethyl ether, m-vinylbenzylmethylether, p-vinyl Aromatic vinyl compounds, such as benzyl methyl ether, o-vinyl benzyl glycidyl ether, m-vinyl benzyl glycidyl ether, and p-vinyl benzyl glycidyl ether;

N-cyclohexylmaleimide, N-benzylmaleimide, N-phenylmaleimide, N-o-hydroxyphenylmaleimide, N-m-hydroxyphenylmaleimide, N-p-hydroxyphenylmaleimide, N-o-methylphenylmaleimide, N-m -N-substituted maleimide compounds such as methylphenylmaleimide, N-p-methylphenylmaleimide, N-o-methoxyphenylmaleimide, N-m-methoxyphenylmaleimide, and N-p-methoxyphenylmaleimide;

Methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, i-propyl (meth)acrylate, n-butyl (meth)acrylate, i-butyl (meth)acrylate, Alkyl (meth)acrylates, such as sec-butyl (meth)acrylate and t-butyl (meth)acrylate;

Cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-methylcyclohexyl (meth)acrylate, tricyclo[5.2.1.0 ^2,6 ]decan-8-yl (meth)acrylate, 2- alicyclic (meth)acrylates such as dicyclopentanyloxyethyl (meth)acrylate and isobornyl (meth)acrylate;

aryl (meth)acrylates such as phenyl (meth)acrylate and benzyl (meth)acrylate;

3-(methacryloyloxymethyl)oxetane, 3-(methacryloyloxymethyl)-3-ethyloxetane, 3-(methacryloyloxymethyl)-2-trifluoromethyloxetane, 3-(methacryloyloxymethyl)-2-phenyloxetane, 2-(methacryloyloxymethyl)oxetane, 2-(methacryloyloxymethyl)-4-trifluoromethyloxetane, etc. The unsaturated oxetane compound of , etc. are mentioned. These monomers can be used individually or in mixture of 2 or more types, respectively.

In particular, as another monomer copolymerizable with the carboxyl group-containing monomer, at least one of an aromatic vinyl compound and an N-substituted maleimide-based compound is preferred in terms of improving curability, mechanical properties, solvent resistance, and chemical resistance.

In the copolymer of the carboxyl group-containing monomer and other monomers copolymerizable with the carboxyl group, the ratio of repeating units derived from the carboxyl group-containing monomer is 2 based on the total number of moles of the carboxyl group-containing monomer and other monomers copolymerizable with the carboxyl group. to 70 mol%, preferably 10 to 60 mol%, and the ratio of repeating units derived from the other copolymerizable monomers is 30 to 70% based on the total number of moles of the carboxyl group-containing monomer and other monomers copolymerizable with the monomer. 98 mol%, preferably 40 to 90 mol%.

Examples of the (meth)acrylate monomer having an epoxy group include glycidyl (meth)acrylate, 3,4-epoxycyclohexyl (meth)acrylate, 3,4-epoxycyclohexylmethyl (meth)acrylate, and methyl glycate. Cydyl (meth)acrylate etc. are mentioned. Among these, glycidyl (meth)acrylate is preferably used. These may be used alone or in combination of two or more.

The (meth)acrylate monomer having an epoxy group is preferably reacted in an amount of 5 to 80 mol%, particularly preferably 10 to 80 mol%, based on 100 mol% of the carboxyl group-containing monomer included in the copolymer. When the (meth)acrylate monomer having an epoxy group is used within the above range, it is preferable because exposure sensitivity and developability are excellent.

The acid value of the alkali-soluble resin is preferably in the range of 20 to 200 (KOH mg/g). When the acid value is in the above range, the solubility in the developing solution is improved, so that the non-exposed portion is easily dissolved and the sensitivity is increased, and as a result, a pattern of the exposed portion remains during development to improve the film remaining ratio, which is preferable. The acid value here is a value measured as the amount (mg) of potassium hydroxide required to neutralize 1 g of the polymer, and can usually be obtained by titrating using an aqueous potassium hydroxide solution.

In addition, the weight average molecular weight in terms of polystyrene (hereinafter simply referred to as 'weight average molecular weight') measured by gel permeation chromatography (GPC; using tetrahydrofuran as an elution solvent) is 3,000 to 200,000, preferably 5,000 to 100,000. Alkali-soluble resins are preferred. When the molecular weight is within the above range, the hardness of the coating film is improved, the residual film rate is high, the solubility of the non-exposed portion in the developing solution is excellent, and the resolution tends to be improved, which is preferable.

The molecular weight distribution [weight average molecular weight (Mw)/number average molecular weight (Mn)] of the alkali-soluble resin is preferably 1.5 to 6.0, more preferably 1.8 to 4.0. The molecular weight distribution [weight average molecular weight (Mw)/number average molecular weight (Mn)] of 1.5 to 6.0 is preferable because developability is excellent.

The content of the alkali-soluble resin (B) is usually in the range of 5 to 85% by weight, preferably 10 to 70% by weight, based on 100% by weight of the solid content in the colored photosensitive resin composition for green pixels. When the content of the alkali-soluble resin (A) is 5 to 85% by weight on the basis of the above, the solubility in the developing solution is sufficient so that it is difficult to generate development residues on the substrate of the non-pixel portion, and the film of the pixel portion of the exposed portion is reduced during development. is less likely to occur and the omission of non-pixel parts tends to be good, which is preferable.

Photopolymerizable Compound (C)

In one embodiment of the present invention, the photopolymerizable compound (C) is a compound that can be polymerized by the action of the photopolymerization initiator (D), and a monofunctional monomer, a bifunctional monomer, or a multifunctional monomer may be used, preferably. may use a bifunctional or more multifunctional monomer.

Specific examples of the monofunctional monomer include nonylphenylcarbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexylcarbitol acrylate, 2-hydroxyethyl acrylate or N-vinyl group. Rolidone and the like, but are not limited thereto.

Specific examples of the bifunctional monomer include 1,6-hexanedioldi(meth)acrylate, ethylene glycoldi(meth)acrylate, neopentylglycoldi(meth)acrylate, and triethylene glycoldi(meth)acrylate. , bis(acryloyloxyethyl) ether of bisphenol A or 3-methylpentanedioldi(meth)acrylate, but is not limited thereto.

Specific examples of the multifunctional monomer include trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate, and pentaerythritol tri (meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, ethoxylated dipentaerythritol hexa(meth)acrylate, propoxylated dipentaerythritol hexa(meth)acrylate acrylate or dipentaerythritol hexa(meth)acrylate, but is not limited thereto.

The photopolymerizable compound (C) may be included in an amount of 1 to 45% by weight, particularly 3 to 45% by weight, based on 100% by weight of the total solid content in the colored photosensitive resin composition for green pixels. When the photopolymerizable compound (C) is included within the above range, the strength and smoothness of the pixel portion may be improved.

Photopolymerization initiator (D)

In one embodiment of the present invention, the photopolymerization initiator generates radicals capable of initiating polymerization of the photopolymerizable compound (C) by exposure to radiation such as visible rays, ultraviolet rays, deep ultraviolet rays, electron beams, and X-rays. it is a compound Examples of such photopolymerization initiators include acetophenone-based compounds, benzophenone-based compounds, biimidazole-based compounds, triazine-based compounds, oxime ester-based compounds, and thioxanthone-based compounds. In the present invention, the photopolymerization initiator may be used alone or in combination of two or more, and it is preferable to use one or more acetophenone-based compounds in terms of photocurability, brightness and/or contrast characteristics of pixels.

Specific examples of the acetophenone-based compound include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethylketal, 2-hydroxy-1-[4-(2-hydroxyl) Roxyethoxy) phenyl] -2-methylpropan-1-one, 1-hydroxycyclohexylphenyl ketone, 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butan-1-one, 2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]propan-1 -one, 2-(4-methylbenzyl)-2-(dimethylamino)-1-(4-morpholinophenyl)butan-1-one, etc. are mentioned.

Examples of the benzophenone-based compound include benzophenone, methyl 0-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3',4,4'-tetra ( tert-butyl peroxycarbonyl) benzophenone, 2,4,6-trimethylbenzophenone, and the like.

Specific examples of the biimidazole compound include 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2,3-dichloro). Phenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(alkoxyphenyl)biimidazole , 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(trialkoxyphenyl)biimidazole, 2,2-bis(2,6-dichlorophenyl)-4, 4'5,5'-tetraphenyl-1,2'-biimidazole or an imidazole compound in which the phenyl group at the 4,4',5,5' position is substituted with a carboalkoxy group; and the like. Among these, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2,3-dichlorophenyl)-4,4' ,5,5'-tetraphenylbiimidazole and 2,2-bis(2,6-dichlorophenyl)-4,4'5,5'-tetraphenyl-1,2'-biimidazole are preferably used do.

Specific examples of the triazine-based compound include 2,4-bis (trichloromethyl) -6- (4-methoxyphenyl) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6 -(4-methoxynaphthyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-piperonyl-1,3,5-triazine, 2,4-bis (trichloromethyl)-6-(4-methoxystyryl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(5-methylfuran-2- yl) ethenyl] -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- [2- (furan-2-yl) ethenyl] -1,3,5-triazine , 2,4-bis (trichloromethyl) -6- [2- (4-diethylamino-2-methylphenyl) ethenyl] -1,3,5-triazine, 2,4-bis (trichloromethyl )-6-[2-(3,4-dimethoxyphenyl)ethenyl]-1,3,5-triazine; and the like.

Examples of the oxime ester compound include 1,2-octanedione, 1-[4-(phenylthio)phenyl]-,2-(O-benzoyloxime), ethanone 1-[9-ethyl-6-(2- methylbenzoyl) -9H carbazol-3-yl] -1- (O-acetyloxime) and the like.

Examples of the thioxanthone-based compounds include 2-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, 1-chloro-4-propoxythioxanthone, and the like. there is

In addition, the photopolymerization initiator (D) may be used in combination with a photopolymerization initiator (d1) in order to improve the sensitivity of the colored photosensitive resin composition for green pixels of the present invention. The colored photosensitive resin composition for green pixels according to the present invention contains the photopolymerization initiation auxiliary agent (d1), so that the sensitivity is further increased and productivity can be improved.

As the photopolymerization initiation aid (d1), for example, at least one compound selected from the group consisting of an amine compound, a carboxylic acid compound, and an organic sulfur compound having a thiol group may be preferably used.

Specific examples of the amine compound include aliphatic amine compounds such as triethanolamine, methyldiethanolamine, and triisopropanolamine; methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 2-ethylhexyl 4-dimethylaminobenzoate, 2-dimethylaminoethyl benzoate, N,N-dimethylparatoluidine, 4, Aromatic amine compounds such as 4'-bis(dimethylamino)benzophenone (commonly known as Michler's ketone) and 4,4'-bis(diethylamino)benzophenone may be used, and it is particularly preferable to use an aromatic amine compound. do.

The carboxylic acid compound is preferably an aromatic heteroacetic acid, specifically phenylthioacetic acid, methylphenylthioacetic acid, ethylphenylthioacetic acid, methylethylphenylthioacetic acid, dimethylphenylthioacetic acid, methoxyphenylthioacetic acid, dimethoxyphenyl Thioacetic acid, chlorophenylthioacetic acid, dichlorophenylthioacetic acid, N-phenylglycine, phenoxyacetic acid, naphthylthioacetic acid, N-naphthylglycine, naphthoxyacetic acid, etc. are mentioned.

Specific examples of the organic sulfur compound having a thiol group include 2-mercaptobenzothiazole, 1,4-bis(3-mercaptobutyryloxy)butane, 1,3,5-tris(3-mercaptobutyloxyethyl)- 1,3,5-triazine-2,4,6(1H,3H,5H)-trione, trimethylolpropanetris(3-mercaptopropionate), pentaerythritoltetrakis(3-mercaptobutyrate) ), pentaerythritol tetrakis (3-mercaptopropionate), dipentaerythritol hexakis (3-mercaptopropionate), tetraethylene glycol bis (3-mercaptopropionate), etc. there is.

The photopolymerization initiator (D) may be included in an amount of 0.1 to 40 parts by weight, preferably 1 to 30 parts by weight, based on 100 parts by weight of the total amount of the alkali-soluble resin (B) and the photopolymerizable compound (C). When the photopolymerization initiator (D) is included in the above range, the colored photosensitive resin composition for green pixels of the present invention is highly sensitive and the exposure time is shortened, so productivity is improved and high resolution can be maintained. In addition, the strength of the pixel portion formed using the composition under the above-described conditions and the smoothness of the surface of the pixel portion may be improved.

Further, when the photopolymerization initiation auxiliary agent (d1) is further used, the photopolymerization initiation auxiliary agent (d1) is 0.1 to 40 parts by weight based on 100 parts by weight of the total amount of the alkali-soluble resin (B) and the photopolymerizable compound (C). , Preferably it may be included in an amount of 1 to 30 parts by weight. When the photopolymerization initiation auxiliary agent (d1) is included in the above range, the sensitivity of the colored photosensitive resin composition for green pixels may be further increased, and productivity of a color filter formed using the composition may be improved.

Solvent (E)

In one embodiment of the present invention, as long as the solvent (E) is effective in dissolving other components included in the colored photosensitive resin composition for green pixels, the solvent used in the conventional colored photosensitive resin composition for green pixels is not particularly limited. ethers, aromatic hydrocarbons, ketones, alcohols, esters or amides are particularly preferred.

The solvent (E) is specifically ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol di Diethylene glycol dialkyl ethers such as ethyl ether, diethylene glycol dipropyl ether and diethylene glycol dibutyl ether, ethylene glycol alkyl ether acetates such as methyl cellosolve acetate and ethyl cellosolve acetate, propylene glycol monomethyl Alkylene glycol alkyl ether acetates such as ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, methoxybutyl acetate, and methoxypentyl acetate; aromatic hydrocarbons such as benzene, toluene, xylene, and mesitylene; Ketones such as methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, and cyclohexanone, alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, and glycerin, ethyl lactate, butylac Cyclic esters, such as esters, such as tate, 3-ethoxy ethyl propionate, and 3-methoxy methyl propionate, and (gamma)-butyrolactone, etc. are mentioned.

The solvent (E) is preferably an organic solvent having a boiling point of 100 ° C to 200 ° C in terms of coating and drying properties, more preferably propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, cyclohexanone, ethyl lac tate, butyl lactate, ethyl 3-ethoxypropionate, methyl 3-methoxypropionate and the like can be used.

The above-exemplified solvents (E) may be used alone or in combination of two or more.

The solvent (E) may be included in an amount of 60 to 90% by weight, preferably 70 to 90% by weight based on the total weight of the colored photosensitive resin composition for green pixels. When the solvent (E) is contained within the above range, coating properties are improved when applied with a coating device such as a roll coater, spin coater, slit and spin coater, slit coater (sometimes referred to as a die coater), inkjet, or the like. can

Additive (F)

The colored photosensitive resin composition for green pixels according to an embodiment of the present invention may include fillers, other polymer compounds, curing agents, adhesion promoters, ultraviolet absorbers, and aggregation inhibitors according to the needs of those skilled in the art, in addition to the above components, within the range not impairing the object of the present invention. It is also possible to use additives (F) such as these together.

Specifically, glass, silica, alumina, etc. may be used as the filler, but is not limited thereto.

Examples of the other polymer compounds include thermosetting resins such as epoxy resins and maleimide resins, thermoplastic resins such as polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ethers, polyfluoroalkyl acrylates, polyesters, and polyurethanes. It may, but is not limited thereto.

The curing agent is used to increase deep curing and mechanical strength, and specifically, an epoxy compound, a polyfunctional isocyanate compound, a melamine compound, an oxetane compound, etc. may be used, but is not limited thereto. The epoxy compound is specifically, bisphenol A-based epoxy resin, hydrogenated bisphenol A-based epoxy resin, bisphenol F-based epoxy resin, hydrogenated bisphenol F-based epoxy resin, noblock type epoxy resin, other aromatic epoxy resins, alicyclic epoxy resins, glycol Cidyl ester-based resins, glycidylamine-based resins, or brominated derivatives of these epoxy resins, aliphatic, alicyclic or aromatic epoxy compounds other than epoxy resins and their brominated derivatives, butadiene (co)polymer epoxides, isoprene (void) Polymer epoxides, glycidyl (meth)acrylate (co)polymers, triglycidyl isocyanurate, and the like may be used, but are not limited thereto. Specifically, the oxetane compound may be carbonate bisoxetane, xylene bisoxetane, adipate bisoxetane, terephthalate bisoxetane, cyclohexanedicarboxylic acid bisoxetane, etc., but are limited thereto It is not.

The curing agent may be used in combination with a curing auxiliary compound capable of ring-opening polymerization of an epoxy group of an epoxy compound and an oxetane skeleton of an oxetane compound together with the curing agent. Specifically, polyvalent carboxylic acids, polyvalent carboxylic acid anhydrides, acid generators, and the like may be used as the curing auxiliary compound. The polyhydric carboxylic acid anhydrides may be commercially available as epoxy resin curing agents. Commercially available epoxy resin curing agents include, for example, Adekahadona EH-700 (manufactured by Adeka Kogyo Co., Ltd.), Rikashiddo HH (manufactured by Nippon Ewha Co., Ltd.), MH-700 (manufactured by Shinnippon Ewha Co., Ltd.), etc. can be heard

The curing agent and curing auxiliary compound exemplified above may be used alone or in combination of two or more.

The adhesion promoter is specifically, vinyltrimethoxysilane, vinyltriethoxysilane, vinyl tris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N -(2-aminoethyl)-3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltri Methoxysilane, 3-isocyanate propyltrimethoxysilane and 3-isocyanate propyltriethoxysilane may be used alone or in mixtures thereof. The adhesion promoter may be included in an amount of 0.01 to 10 parts by weight, preferably 0.05 to 2 parts by weight, based on 100 parts by weight of the solid content of the colored photosensitive resin composition for green pixels.

Specifically, the ultraviolet absorber may be 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5-chlorobenzotriazole, alkoxybenzophenone, etc., but is not limited thereto.

The aggregation inhibitor may specifically use sodium polyacrylate or the like, but is not limited thereto.

The colored photosensitive resin composition for green pixels according to an embodiment of the present invention can be prepared, for example, by the following method.

First, the pigment (a1) of the colorant (A) is mixed with the solvent (E) and dispersed using a bead mill or the like until the average particle diameter of the pigment is about 0.2 μm or less. At this time, if necessary, the pigment dispersant (a2), some or all of the alkali-soluble resin (B), or the dye (a3) may be mixed with the solvent (E) to be dissolved or dispersed. The remainder of the alkali-soluble resin (B), a photopolymerization initiator (D), a photopolymerizable compound (C), an additive (F), and, if necessary, a solvent (E) are further added to the mixed dispersion to a predetermined concentration, according to the present invention. A colored photosensitive resin composition for green pixels according to the above can be prepared.

One embodiment of the present invention relates to a color filter formed using the above-described colored photosensitive resin composition for a green pixel. A color filter according to an embodiment of the present invention is characterized in that it includes a colored layer formed by applying the above-described colored photosensitive resin composition for green pixels on a substrate, exposing and developing in a predetermined pattern.

Hereinafter, a pattern formation method using the colored photosensitive resin composition for green pixels of the present invention will be described in detail.

A method for forming a pattern using the colored photosensitive resin composition for a green pixel of the present invention may use a method known in the art, but typically includes an application step; exposure step; and a removal step. By applying the colored photosensitive resin composition for green pixels of the present invention on a substrate, photocuring and developing to form a pattern, it can be used as a colored pixel (colored image).

Specifically, the colored photosensitive resin composition for the green pixel is applied on a glass substrate to which nothing is coated and a glass substrate to which SiNx (protective film) is coated at a thickness of 500 to 1,500 Å using an appropriate method such as spin coating or slit coating , applied in a thickness of 0.5 to 3.4 μm. After application, light is irradiated to form a pattern required for the color filter. After light is irradiated, when the coating layer is treated with an alkaline developer, the unirradiated portion of the coating layer is dissolved and a pattern required for the color filter is formed. By repeating this process according to the required number of R, G, and B colors, a color filter having a desired pattern can be obtained. In addition, in the above process, crack resistance, solvent resistance, and the like can be further improved by heating the image pattern obtained by development again or curing by irradiation with actinic rays or the like.

One embodiment of the present invention relates to an image display device provided with the color filter described above.

The color filter of the present invention is particularly advantageous when applied to an image display device for AR/VR.

As the image display device for AR/VR, a micro display such as a micro organic light emitting diode (OLED) or a micro light emitting diode (LED) may be used.

The image display device of the present invention includes a configuration known in the art, except for having the color filter described above.

Hereinafter, the present invention will be described in more detail by Examples, Comparative Examples and Experimental Examples. These Examples, Comparative Examples and Experimental Examples are only for explaining the present invention, and it is obvious to those skilled in the art that the scope of the present invention is not limited thereto.

Preparation Example 1: Preparation of Pigment Dispersion A-1

As a pigment, C.I. 12.0 parts by weight of Pigment Green 36, 4.0 parts by weight of LPN-6919 (manufactured by BYK) as a pigment dispersant, and 84.0 parts by weight of propylene glycol monomethyl ether acetate as a solvent were mixed and dispersed by a bead mill for 12 hours to obtain Pigment Dispersion A-1 was manufactured.

Preparation Example 2: Preparation of Pigment Dispersion A-2

As a pigment, C.I. 12.0 parts by weight of Pigment Green 58, 4.0 parts by weight of LPN-6919 (manufactured by BYK) as a pigment dispersant, and 84.0 parts by weight of propylene glycol monomethyl ether acetate as a solvent were mixed and dispersed by a bead mill for 12 hours to obtain Pigment Dispersion A-2 was manufactured.

Preparation Example 3: Preparation of Pigment Dispersion A-3

As a pigment, C.I. 12.0 parts by weight of Pigment Green 7, 4.0 parts by weight of LPN-6919 (manufactured by BYK) as a pigment dispersant, and 84.0 parts by weight of propylene glycol monomethyl ether acetate as a solvent were mixed and dispersed by a bead mill for 12 hours to obtain Pigment Dispersion A-3 was manufactured.

Preparation Example 4: Preparation of Pigment Dispersion A-4

As a pigment, C.I. 12.0 parts by weight of Pigment Yellow 138, 4.0 parts by weight of LPN-6919 (manufactured by BYK) as a pigment dispersant, and 84.0 parts by weight of propylene glycol monomethyl ether acetate as a solvent were mixed and dispersed by a bead mill for 12 hours to obtain Pigment Dispersion A-4 was manufactured.

Preparation Example 5: Preparation of Pigment Dispersion A-5

As a pigment, C.I. 12.0 parts by weight of Pigment Yellow 139, 4.0 parts by weight of LPN-6919 (manufactured by BYK) as a pigment dispersant, and 84.0 parts by weight of propylene glycol monomethyl ether acetate as a solvent were mixed and dispersed by a bead mill for 12 hours to obtain Pigment Dispersion A-5 was manufactured.

Preparation Example 6: Preparation of Pigment Dispersion A-6

As a pigment, C.I. 12.0 parts by weight of Pigment Yellow 150, 4.0 parts by weight of LPN-6919 (manufactured by BYK) as a pigment dispersant, and 84.0 parts by weight of propylene glycol monomethyl ether acetate as a solvent were mixed and dispersed by a bead mill for 12 hours to obtain Pigment Dispersion A-6 was manufactured.

Synthesis Example 1: Alkali-soluble resin (B-1)

A flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and a nitrogen inlet pipe was prepared, and on the other hand, as a monomer dropping funnel, 74.8 g (0.20 mol) of benzylmaleimide, 43.2 g (0.30 mol) of acrylic acid, 118.0 vinyltoluene g (0.50 mol), 4 g of t-butylperoxy-2-ethylhexanoate, and 40 g of propylene glycol monomethyl ether acetate (PGMEA) were added and stirred and mixed to prepare, and as a chain transfer agent dropping tank, n-dodecanethiol 6 g and 24 g of PGMEA were added and stirred and mixed. Thereafter, 395 g of PGMEA was introduced into the flask, the atmosphere in the flask was changed from air to nitrogen, and the temperature of the flask was raised to 90° C. while stirring. Subsequently, loading of the monomer and chain transfer agent from the loading lot was started. Dropping proceeded for 2 hours while maintaining 90 ° C. After 1 hour, the temperature was raised to 110 ° C. and maintained for 3 hours. Gas bubbling was started. Then, 28.4 g of glycidyl methacrylate [(0.10 mol), (33 mol% relative to the carboxyl group of acrylic acid used in this reaction)], 2,2'-methylenebis(4-methyl-6-t-butylphenol ) 0.4 g and 0.8 g of triethylamine were added into the flask, and the reaction was continued at 110° C. for 8 hours to obtain an alkali-soluble resin B-1 having a solid acid value of 70 mgKOH/g. The weight average molecular weight in terms of polystyrene measured by GPC was 16,000, and the molecular weight distribution (Mw/Mn) was 2.3.

Examples 1 to 7 and Comparative Examples 1 to 3: Preparation of colored photosensitive resin composition for green pixels

A colored photosensitive resin composition for a green pixel was prepared by mixing each component according to the composition shown in Table 1 below (unit: parts by weight).

Example comparative example One 2 3 4 5 6 7 One 2 3 (A) colorant A-1 10 10 10 6.5 15 40 5 18 A-2 10 A-3 10 A-4 30 20 20 30 30 33.5 25 35 22 A-5 10 A-6 10 (B) alkali soluble resin B-1 15 15 15 15 15 15 15 15 15 15 (C) photopolymerizable compound C-1 7.4 7.4 7.4 7.4 7.4 7.4 7.4 7.4 7.4 7.4 (D) photopolymerization initiator D-1 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 (E) Solvent E-1 37 37 37 37 37 37 37 37 37 37 (F) additives F-1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2

A-1: Pigment dispersion of Preparation Example 1

A-2: Pigment dispersion of Preparation Example 2

A-3: Pigment dispersion of Preparation Example 3

A-4: Pigment dispersion of Preparation Example 4

A-5: Pigment dispersion of Preparation Example 5

A-6: Pigment dispersion of Preparation Example 6

B-1: Alkali-soluble resin of Synthesis Example 1

C-1: dipentaerythritol hexaacrylate (KAYARAD DPHA; manufactured by Nippon Kayaku Co., Ltd.)

D-1: 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butan-1-one (Irgacure 369; manufactured by Ciba Specialty Chemical)

E-1: propylene glycol monomethyl ether acetate

F-1: 3-methacryloxypropyltrimethoxysilane

Experimental Example 1

A color filter was prepared as follows using the photosensitive resin composition for a green pixel prepared in Examples and Comparative Examples, and the luminance, color coordinates, and contrast characteristics were measured in the following manner, and the results are shown in Table 2 below. showed up

<Manufacture of color filter>

Each of the colored photosensitive resin compositions was applied on a glass substrate by spin coating, and then placed on a heating plate and maintained at a temperature of 100° C. for 3 minutes to form a thin film. Subsequently, the ultraviolet light source was irradiated with an illuminance of 100 mJ/cm 2 using a 1KW high-pressure mercury lamp containing all of the g, h, and i lines, and no special optical filter was used. The thin film irradiated with ultraviolet rays was developed by immersing it in a KOH aqueous solution of pH 10.5 for 2 minutes. The substrate coated with the thin film was washed with distilled water, dried by blowing nitrogen gas, and heated in a heating oven at 230° C. for 5 minutes to prepare a color filter. The film thickness of the color filter prepared above was 2.0 μm.

(1) Luminance and color coordinates

Luminance and color coordinates were measured using a microscopic spectrometer OSP-SP2000 (Olympus).

The evaluation criteria of luminance (Y) are as follows, and the following numerical values refer to luminance values in the same color coordinates (x = 0.345, y = 0.430).

<Luminance (Y) Evaluation Criteria>

◎: Y ≥ 93

○: 90 ≤ Y < 93

△: 87 ≤ Y < 90

×: Y < 87

The evaluation criteria of the color coordinates are as follows, and the following values are based on the x-coordinate values when the y-coordinate of the target color coordinates (x = 0.345, y = 0.430) is the standard, and refers to the difference value from the target x-coordinate. .

<Color coordinate evaluation criteria>

◎: x ≤ ± 0.001

○: ±0.001 < x ≤ ±0.002

△: ±0.002 < x ≤ ±0.005

×: x > ±0.005

(2) Contrast

Contrast was measured using a Topcon contrast measuring instrument BM-5A model. The measurement standard was based on the contrast of 1/10000 of the glass substrate (before formation of the coloring layer).

The evaluation criteria for contrast (CR) are as follows, and the following numerical values refer to contrast values in the same color coordinates (x = 0.345, y = 0.430).

<Contrast Evaluation Criteria>

◎: CR ≥ 8500

○: 8000 ≤ CR < 8500

△: 7500 ≤ CR < 8000

×: CR < 7500

color coordinates luminance contrast Example One ◎ ◎ ◎ 2 ◎ ○ ◎ 3 ◎ ○ ◎ 4 ◎ ○ ◎ 5 ○ △ ○ 6 ○ ◎ ◎ 7 ○ ○ ◎ comparative example One × × × 2 × △ ○ 3 △ △ △

As shown in Table 2, the colored photosensitive resin compositions for green pixels of Examples 1 to 7 containing a green pigment in a specific mixing ratio with other pigments have excellent color coordinates, luminance and contrast characteristics, which are advantageous for AR/VR. appeared to be usable.

On the other hand, the colored photosensitive resin compositions for green pixels of Comparative Examples 1 to 3 were found to have poor color coordinates, luminance and/or contrast characteristics.

Having described specific parts of the present invention in detail above, it is clear that these specific techniques are only preferred embodiments for those skilled in the art to which the present invention belongs, and the scope of the present invention is not limited thereto. do. Those skilled in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above information.

Accordingly, the substantial scope of the present invention will be defined by the appended claims and equivalents thereof.

Claims (6)

A colorant, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator and a solvent,
The colorant includes a green pigment and other pigments,
The colored photosensitive resin composition for a green pixel, wherein the mixing ratio of the green pigment and other pigments is 40:60 to 15:85 by weight. The method of claim 1, wherein the green pigment is C.I. A colored photosensitive resin composition for green pixels, which is at least one selected from Pigment Green 58 and 36. The method of claim 1, wherein the other pigment is C.I. Pigment Yellow 138, 139, and at least one selected from among 150, a colored photosensitive resin composition for green pixels. The colored photosensitive resin composition for green pixels according to claim 1, wherein the content of the colorant is 5 to 50% by weight based on 100% by weight of the total solid content in the colored photosensitive resin composition. A color filter formed by using the colored photosensitive resin composition for a green pixel according to any one of claims 1 to 4. An image display device characterized in that the color filter according to claim 5 is provided.