KR102433073B1 - Yellow curableresin composition, color filter and display device having the same - Google Patents

Abstract

The present invention relates to a yellow colorant; and a wavelength absorber having a maximum absorption wavelength of 560 to 620 nm and satisfying specific transmission characteristics, thereby preventing the mixing of red to green pixel layers in an image display device using blue light to improve color gamut and light efficiency. It relates to a curable resin composition, a color filter and an image display device manufactured using the same.

Description

Yellow curable resin composition, color filter and image display device manufactured using the same

The present invention relates to a yellow curable resin composition capable of improving color reproducibility, a color filter manufactured using the same, and an image display device.

A color filter is a thin film type optical component that extracts red, green, blue, and three colors from white light and makes it possible in minute pixels.

The color filter includes a black matrix layer formed in a predetermined pattern on a transparent substrate to block light at a boundary between each pixel, and a plurality of colors (typically, red (R), green (G)) to form each pixel. and pixel units in which the three primary colors of blue (B) are arranged in a predetermined order are sequentially stacked.

In general, color filters can be manufactured by coating three or more colors on a transparent substrate by a dyeing method, an electrodeposition method, a printing method, a pigment dispersion method, etc. Recently, a pigment dispersion method using a pigment dispersion type photosensitive resin is the mainstream accomplish

Among them, the pigment dispersion method coats a photosensitive resin composition containing a colorant, an alkali-soluble resin, a photopolymerization monomer, a photoinitiator, an epoxy resin, a solvent, and other additives on a transparent substrate provided with a black matrix, and forms a pattern to be formed. After exposure, a method of forming a colored thin film by repeating a series of processes of thermal curing by removing the non-exposed portion with a solvent, and is actively applied to the manufacture of LCDs such as mobile phones, notebook computers, monitors, and TVs.

In recent years, even in the photosensitive resin composition for a color filter using a pigment dispersion method having various advantages, not only excellent pattern characteristics but also high color reproducibility, and further improved performance such as high brightness and high contrast ratio are required.

However, color reproduction is realized by the light irradiated from the light source passing through the color filter, and in this process, part of the light is absorbed by the color filter, so the light efficiency is lowered. There are fundamental limitations that

As a way to solve this problem, a color filter using a quantum dot photosensitive resin composition has been proposed.

Korean Patent Publication No. 2007-0094679 suggests that color reproducibility can be improved by including a color filter layer formed of quantum dots, and Korean Patent Publication No. 2009-0036373 discloses an existing color filter made of a quantum dot phosphor. It is suggested that the display quality can be improved by improving the luminous efficiency by replacing the light emitting layer.

In this way, when the quantum dots are used as the light emitting material of the color filter, the light emission waveform can be narrowed, and high color realization ability that cannot be realized with pigments is obtained, and has excellent luminance characteristics. However, due to the low stability of the quantum dots performed in the color filter manufacturing, crystals or the like are generated on the surface, resulting in a problem in which the luminous efficiency of the quantum dots is greatly reduced.

In particular, an image display device equipped with a quantum dot color filter uses blue light as a light source, and the blue light used at this time is mixed with the self-luminous light in the red, green, and blue pixel layers. That is, there is no problem in the case of the blue pixel layer, but in the case of the red and green pixel layers, it is difficult to emit pure red and green. For example, in the case of a green pixel layer, an emission peak appears at 500 to 550 nm due to quantum dots, but when blue light is used, a peak due to blue light at 380 to 400 nm appears at the same time, thereby lowering the color purity of the color filter.

Accordingly, there is a limitation in reproducibly displaying a desired color, and thus there is a disadvantage in that image quality is deteriorated.

Republic of Korea Patent Publication No. 2007-0094679 (2007.09.21) Republic of Korea Patent Publication No. 2009-0036373 (2009.04.14)

In order to solve the above problems, an object of the present invention is to provide a yellow curable resin composition for providing a color filter and an image display device having improved color reproducibility and light efficiency.

In addition, an object of the present invention is to provide a color filter and an image display device having improved color reproducibility and light efficiency by including a cured product of the yellow curable resin composition.

The yellow curable resin composition of the present invention for achieving the above object is a yellow colorant; and a wavelength absorber having a maximum absorption wavelength of 560 to 620 nm and satisfying the transmission characteristics of Equation 1 below.

[Equation 1]

10% ≤ T(λ) ≤ 60%

T(λ-20nm) ≥ 60%

T(λ+20nm) ≥ 60%

(In Equation 1 above,

T is the transmittance (%), and λ is a wavelength selected from 560 to 620 nm).

In addition, the color filter of the present invention includes a cured product of the yellow curable resin composition.

In addition, the image display apparatus of the present invention includes the color filter.

The yellow curable resin composition according to the present invention has the advantage of being able to manufacture a color filter and an image display device with improved color reproducibility and light efficiency.

In addition, the color filter and the image display device manufactured using the yellow curable resin composition according to the present invention have the advantage of improved color reproducibility and light efficiency.

1 is a cross-sectional view showing a color filter according to an embodiment of the present invention.
2 is a cross-sectional view illustrating an arrangement of a color filter with respect to a light source according to an exemplary embodiment of the present invention.

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

In the present invention, when a member is said to be located "on" another member, this includes not only a case in which a member is in contact with another member but also a case in which another member is present between the two members.

In the present invention, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

<Yellow Curable Resin Composition>

A yellow curable resin composition according to an aspect of the present invention includes a yellow colorant; and a wavelength absorber having a maximum absorption wavelength of 560 to 620 nm and satisfying the transmission characteristics of Equation 1 below, thereby improving color reproducibility and light efficiency when manufacturing a color filter and an image display device using this.

[Equation 1]

10% ≤ T(λ) ≤ 60%

T(λ-20nm) ≥ 60%

T(λ+20nm) ≥ 60%

(In Equation 1 above,

T is the transmittance (%), and λ is a wavelength selected from 560 to 620 nm).

yellow colorant

The yellow curable resin composition according to one embodiment of the present invention includes a yellow colorant.

A color filter using quantum dots is a material that emits light by itself, unlike a color filter including a pigment, and a self-emission pixel layer is formed on the pixel area to emit red, green, or blue colors by itself. The self-emission pixel layer absorbs irradiated light and emits red light, blue light, and green light by itself. That is, when light is irradiated to red quantum dots, blue quantum dots, and green quantum dots, red emission occurs at 600-700 nm, green emission occurs at 490-590 nm, and blue emission occurs at 400-480 nm to realize full color. At this time, the light source of the image display device to which the color filter is mounted uses blue light. Looking at the emission spectrum of the red to green self-luminous pixel layer, the emission spectrum of blue light exists at 400 to 480 nm due to the blue light. The color mixing of the self-luminous pixel layer occurs, which seriously occurs in the red to green pixel layer.

In order to prevent the above problems, by placing a yellow coating layer, which is a cured product of a yellow curable resin composition containing a yellow colorant, on the red to green pixel layers, only green and red and blue are included in the green pixel layer in which green and blue are mixed. Only red is displayed in the mixed red pixel layer, and as a result, pure green or pure red light can be extracted, thereby improving color purity and light efficiency of self-emissive light.

The yellow colorant is not particularly limited, and a commonly known yellow colorant may be used, for example, any one of pigments, dyes, and dyes may be used.

Specifically, the following color index (C.I.; published by The Society of Dyers and Colorists) numbers to which the number can be mentioned. However, it is preferable that the colorant is halogen-free from the viewpoint of reducing the environmental load and affecting the human body. More specifically,

Monoazo pigments: C.I. Pigment Yellow 1, 2, 5, 8, 105, 120, 150, 168, 182, 183, 190;

Pyrazolone azo pigments: C.I. Pigment Yellow 10;

Diazo pigments: C.I. Pigment Yellow 12, 16, 63, 83, 126, 127, 128, 152, 170, 188;

Azomethine pigments: C.I. Pigment Yellow 101, 129;

Anthraquinone pigments: C.I. Pigment Yellow 108, 147, 193, 197, 199, 202;

Isoindolinone pigments: C.I. Pigment Yellow 109, 110, 139, 173, 185;

Quinoline pigments: C.I. Pigment Yellow 115;

Quinophthalone pigments: C.I. Pigment Yellow 138;

Polycyclic pigments: C.I. Pigment Yellow 148;

Dioxime pigments: C.I. Pigment Yellow 153;

Benzimidazolone pigments: C.I. Pigment Yellow 154, 175, 180, 181;

Heterocyclic pigments: C.I. Pigment Yellow 192;

Perinone pigments: C.I. Pigment Yellow 196;

Inorganic pigments: C.I. Pigments 31, 32, 30, 119, 157, 162, 184;

Cyanine-based pigments; Xanthene-based pigments; Merocyanine-based pigments; Dipyrrin-based pigments; Arylmethine-based pigments; acridine-based pigments; Coumarin-based pigments; Oxazine-based pigments; Tetrapyrrole pigments and the like may be used, but the present invention is not limited thereto.

In some cases, these pigments are treated with rosin, surface treatment using a pigment derivative having an acidic or basic group introduced therein, surface graft treatment using a polymer compound, etc., fine particle treatment using sulfuric acid, or washing with an organic solvent or water processing or the like may have been performed.

In particular, among the yellow colorants exemplified above, C.I. Pigment Yellow 185 can be preferably used.

According to an embodiment of the present invention, the yellow colorant is used in an amount of 5 to 80% by weight, preferably 10 to 50% by weight, based on 100% by weight of the total solid content in the total yellow curable resin composition. If the content is less than the above range, it is difficult to expect the effect of improving color purity and light efficiency as described above according to the blocking of blue light. It is preferable to use it appropriately.

The yellow colorant in the present invention may be used together with a dispersing agent, a dispersing aid, and the like, if necessary.

As said dispersing agent, although suitable dispersing agents, such as cationic, anionic, and nonionic, can be used, for example, A polymer dispersing agent is preferable. Specifically, an acrylic copolymer, polyurethane, polyester, polyethyleneimine, polyallylamine, etc. are mentioned. Such dispersants are commercially available, for example, as acrylic copolymers DisperBYK-2000, DisperBYK-2001, BYK-LPN6919, BYK-LPN21116 (above, manufactured by BYK), Solsperse 5000 (manufactured by Lubrizol) ), as polyurethanes, DisperBYK-161, DisperBYK-162, DisperBYK-163, DisperBYK-165, DisperBYK-167, DisperBYK-170, DisperBYK-182 (above, manufactured by BYK), Solsperse 76500 (manufactured by Lubrizol) ), Solsperse 24000 (manufactured by Lubrizol, Ltd.) as polyethyleneimine, and Ajisper PB821, Ajisper PB822, and Ajisper PB880 (manufactured by Ajinomoto Fine Techno, Ltd.) as polyester.

As said dispersing auxiliary agent, a pigment derivative is mentioned, for example, Copper phthalocyanine, diketopyrrolopyrrole, the sulfonic acid derivative of quinophthalone, etc. are mentioned specifically,.

The dispersant may be used alone or in combination of two or more. The content of the dispersant may be usually 1 part by weight or less, preferably 0.1 to 0.7 parts by weight, and more preferably 0.05 to 0.5 parts by weight based on 1 part by weight of the yellow colorant. When there is too much content of a dispersing agent, there exists a possibility that developability etc. may be impaired.

wavelength absorber

The yellow curable resin composition according to an embodiment of the present invention has a maximum absorption wavelength range of 560 to 620 nm, and includes a wavelength absorber satisfying the transmission characteristics of Equation 1 below.

[Equation 1]

10% ≤ T(λ) ≤ 60%

T(λ-20nm) ≥ 60%

T(λ+20nm) ≥ 60%

(In Equation 1 above,

T is the transmittance (%), and λ is a wavelength selected from 560 to 620 nm).

As described above, the self-emission pixel layer formed in the color filter absorbs the irradiated light and emits red light, blue light, and green light by itself. That is, when light is irradiated to the red quantum dots, blue quantum dots, and green quantum dots, red light emission at 600 to 700 nm, green light emission at 490 to 590 nm, and blue light emission at 400 to 480 nm occur to realize full color. As an error occurs in the wavelength range in which the to green light is emitted, the color mixture in the red light to the green light may occur.

In order to solve the above problems, the present invention has a maximum absorption wavelength range of 560 to 620 nm, and includes a wavelength absorber that satisfies the transmission characteristics of Equation 1 to prevent color mixing in red light to green light, and color gamut has the advantage of improving

The wavelength absorber has a maximum absorption wavelength range of 560 to 620 nm and may be used without particular limitation as long as it satisfies the transmission characteristics of Equation 1 above.

The wavelength absorber according to an embodiment of the present invention may include a compound represented by the following formula (1).

[Formula 1]

(In Formula 1,

M is Cu or Zn,

X ₁ is a halogen element selected from the group consisting of F, Cl and Br, n is an integer from 0 to 5,

R ₁ to R ₄ are each independently selected from the group consisting of methyl, ethyl, propyl, isopropyl and tert-butyl.)

More specifically, the compound represented by Formula 1 may include the following compounds.

[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

[Formula 2-4]

[Formula 2-5]

[Formula 3-1]

[Formula 3-2]

[Formula 3-3]

[Formula 3-4]

[Formula 3-5]

As the wavelength absorber, a commercially available wavelength absorber may be used, and specifically, BD-590 and CA-590 manufactured by Gyeongin Corporation, but is not limited thereto.

The wavelength absorber may be included in an amount of 1 to 30% by weight, preferably 1 to 20% by weight, more preferably 1 to 10% by weight based on 100% by weight of the total solid content of the yellow curable resin composition. When the content of the wavelength absorber is less than the above range, color mixing occurs in the wavelength region of red light and green light, thereby reducing luminous efficiency.

The yellow curable resin composition according to an embodiment of the present invention may further include at least one selected from the group consisting of alkali-soluble resins, photopolymerizable compounds, photoinitiators, solvents, and additives.

Alkali Soluble Resin

The yellow curable resin composition according to an embodiment of the present invention may further include an alkali-soluble resin.

The alkali-soluble resin has reactivity and alkali solubility under the action of heat, acts as a dispersion medium for solid content including a colorant, and functions as a binder resin, which is a binder soluble in an alkaline developer used in the developing step of film production using the resin composition. Any resin can be used.

The alkali-soluble resin may be used having an acid value of 20 to 200 (KOH mg / g). At this time, the acid value is a value measured as the amount (mg) of potassium hydroxide required to neutralize 1 g of the acrylic polymer and is involved in solubility. If the acid value of the alkali-soluble resin is less than the above range, it is difficult to secure a sufficient development speed. Conversely, if the acid value exceeds the above range, the adhesion with the substrate is reduced and short circuit of the pattern is likely to occur, and the storage stability of the entire composition is lowered and the viscosity increases a problem arises

In addition, the alkali-soluble resin may have a weight average molecular weight of 3,000 to 200,000 Da, preferably 5,000 to 100,000 Da, and a molecular weight distribution of 1.5 to 6.0, preferably 1.8 to 4.0 for use as a color filter. It can be directly polymerized to have a range or can be purchased and used. The alkali-soluble resin having the molecular weight and molecular weight distribution within the above ranges has the advantages of excellent solubility of non-exposed parts in the developer as well as improved hardness and high residual film rate, as mentioned above, and improved resolution.

The alkali-soluble resin may be an acrylic monomer having an unsaturated double bond. In the case of a dispersion resin having an acid value, it can be prepared by copolymerizing a monomer having the following carboxyl group and an unsaturated bond, and a monomer having an unsaturated bond copolymerizable therewith.

Specific examples of the monomer having a carboxyl group and an unsaturated bond include monocarboxylic acids such as acrylic acid, methacrylic acid, and crotonic acid; dicarboxylic acids such as fumaric acid, mesaconic acid, and itaconic acid; and anhydrides of these dicarboxylic acids; and polymer mono(meth)acrylates having a carboxyl group and a hydroxyl group at both terminals, such as ω-carboxypolycaprolactone mono(meth)acrylate.

More specifically, acrylic acid, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, fumaric acid or maleic acid alkyl esters are possible, wherein the maleic acid alkyl esters include monomethyl maleic acid, ethyl maleic acid, n-propyl maleic acid, isopropyl maleic acid, and n-butyl maleic acid, n-hexyl maleic acid, n-octyl maleic acid, 2-ethylhexyl maleic acid, n-nonyl maleic acid, or n-dodecyl maleic acid.

The monomer having the carboxyl group and the unsaturated bond and the monomer copolymerizable therewith may be used alone or in combination of two or more.

The copolymerizable monomer is an aromatic vinyl compound, an unsaturated carboxylic acid ester compound, an unsaturated carboxylic acid aminoalkyl ester compound, an unsaturated carboxylic acid glycidyl ester compound, a carboxylic acid vinyl ester compound, an unsaturated ether compound, and a vinyl cyanide compound. At least one selected from the group consisting of compounds, unsaturated imide compounds, aliphatic conjugated diene compounds, macromonomers having monoacryloyl or monomethacryloyl groups at the ends of molecular chains, bulky monomers, and combinations thereof is possible do.

Specifically, the copolymerizable monomer is styrene, vinyltoluene, α-methylstyrene, p-chlorostyrene, o-methoxystyrene, m-methoxystyrene, p-methoxystyrene, o-vinylbenzylmethyl ether, m -Aromatic vinyl compounds, such as vinylbenzylmethyl ether, p-vinylbenzylmethyl ether, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl ether, or p-vinylbenzyl glycidyl ether; 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 or 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-dic alicyclic (meth)acrylates such as clofentanyloxyethyl (meth)acrylate or isobornyl (meth)acrylate; aryl (meth)acrylates such as phenyl (meth)acrylate or benzyl (meth)acrylate; hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate or 2-hydroxypropyl (meth)acrylate; 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; unsaturated amide compounds such as (meth)acrylamide and N,N'-dimethyl (meth)acrylamide; 3-(methacryloyloxymethyl)oxetane, 3-(methacryloyloxymethyl)-3-ethyloxetane, 3-(methacryloyloxymethyl)-2-trifluoromethyloxetane; 3-(methacryloyloxymethyl)-2-phenyloxetane, 2-(methacryloyloxymethyl)oxetane or 2-(methacryloyloxymethyl)-4-trifluoromethyloxetane, etc. of unsaturated oxetane compounds.

The content of the alkali-soluble resin may be included in an amount of 2 to 80% by weight, preferably 5 to 75% by weight, more preferably 10 to 70% by weight, based on 100% by weight of the total solid content in the yellow curable resin composition. If the content of the alkali-soluble resin falls within the above range, it is easy to form a yellow coating layer, and in the process including the developing process, the film reduction of the pixel part of the exposed part is prevented during development, so that the omission of the non-pixel part is good. There is an advantage.

photopolymerization compound

The yellow curable resin composition according to an embodiment of the present invention may further include a photopolymerizable compound.

The photopolymerizable compound is not particularly limited as long as it is a compound capable of polymerization by the action of a photopolymerization initiator to be described later, but is preferably a monofunctional photopolymerizable compound, a bifunctional photopolymerizable compound, or a trifunctional or more polyfunctional photopolymerizable compound. can be heard

Specific examples of the monofunctional photopolymerizable compound include nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, 2-hydroxyethyl acrylate, N- vinylpyrrolidone and the like, and commercially available products include Aronix M-101 (Toagosei), KAYARAD TC-110S (Nippon Kayaku), or Viscot 158 (Osaka Yuki Chemical Co., Ltd.).

Specific examples of the bifunctional photopolymerizable compound include 1,6-hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, triethylene glycol di (meth) acrylic lactate, bis(acryloyloxyethyl)ether of bisphenol A, 3-methylpentanediol di(meth)acrylate, and the like. Commercially available products include Aronix M-210, M-1100, M-1200 (Toagosei). ), KAYARAD HDDA (Nippon Kayaku), Biscott 260 (Osaka Yuki Chemical High School), AH-600, AT-600, or UA-306H (Kyoeisha Chemical).

Specific examples of the trifunctional or higher polyfunctional photopolymerizable compound include trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate , pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, thipentaerythritol penta (meth) acrylate, ethoxylated dipentaerythritol hexa (meth) acrylate, propoxylate Tiddipentaerythritol hexa(meth)acrylate, dipentaerythritol hexa(meth)acrylate, etc. are available. Commercially available products include Aronix M-309, TO-1382 (Toagosei), KAYARAD TMPTA, KAYARAD DPHA or KAYARAD. DPHA-40H (Nippon Kayaku) etc. are mentioned.

Among the photopolymerizable compounds exemplified above, trifunctional or more (meth)acrylic acid esters and urethane (meth)acrylates are particularly preferable in terms of excellent polymerizability and improved strength.

The photopolymerizable compounds exemplified above may be used alone or in combination of two or more.

The photopolymerizable compound may be included in an amount of 5 to 70% by weight, preferably 10 to 60% by weight, more preferably 15 to 50% by weight, based on 100% by weight of the total solid content of the yellow curable resin composition. When the photopolymerizable compound is included within the above range, there is an advantage in that the strength or smoothness of the pixel portion is good.

light curing initiator

The yellow curable resin composition according to an embodiment of the present invention may further include a photoinitiator.

The photopolymerization initiator may be used without particularly limiting its type as long as it can polymerize the above-described photopolymerizable compound. Specifically, the group consisting of acetophenone-based compounds, benzophenone-based compounds, triazine-based compounds, biimidazole-based compounds, oxime compounds, and thioxanthone-based compounds from the viewpoint of polymerization characteristics, initiation efficiency, absorption wavelength, availability or price, etc. It is preferable to use at least one compound selected from

Specific examples of the acetophenone-based compound include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethyl ketal, and 2-hydroxy-1-[4-(2-hydroxyl). oxyethoxy)phenyl]-2-methylpropan-1-one, 1-hydroxycyclohexylphenylketone, 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]propane-1 -one or 2-(4-methylbenzyl)-2-(dimethylamino)-1-(4-morpholinophenyl)butan-1-one;

Examples of the benzophenone compound include benzophenone, methyl 0-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3',4,4'-tetra( tert-butylperoxycarbonyl)benzophenone or 2,4,6-trimethylbenzophenone.

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 or 2,4-bis(trichloromethyl) )-6-[2-(3,4-dimethoxyphenyl)ethenyl]-1,3,5-triazine etc. are mentioned.

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 the imidazole compound in which the phenyl group at the 4,4',5,5'-position is substituted with the carboalkoxy group, etc. are mentioned. Among them, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2,3-dichlorophenyl)-4,4' ,5,5'-tetraphenylbiimidazole or 2,2-bis(2,6-dichlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole is preferably can be used

Specific examples of the oxime compound include o-ethoxycarbonyl-α-oxyimino-1-phenylpropan-1-one, and commercially available products include OXE01 and OXE02 manufactured by BASF.

Examples of the thioxanthone compound include 2-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone or 1-chloro-4-propoxythioxanthone. can be heard

Moreover, within the range which does not impair the effect of this invention, you can also use together the photoinitiator etc. other than the above. For example, a benzoin-based compound or an anthracene-based compound may be mentioned, and these may be used alone or in combination of two or more.

Examples of the benzoin-based compound include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, or benzoin isobutyl ether.

Examples of the anthracene-based compound include 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, or 2-ethyl-9,10-diethoxyanthracene. can be heard

Other 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 10-butyl-2-chloroacridone, 2-ethylanthraquinone, benzyl-9,10-phenanthrenequinone, camphorquinone, phenylclioxylic acid A methyl or titanocene compound may be used in combination as a photopolymerization initiator.

The photopolymerization initiator may be included in an amount of 0.1 to 40% by weight, preferably 0.5 to 35% by weight, more preferably 1 to 30% by weight, based on 100% by weight of the total solid content of the yellow curable resin composition. When the photopolymerization initiator is included within the above range, the yellow curable resin composition is highly sensitive and exposure time is shortened, thereby improving productivity and maintaining high resolution. In addition, there is an advantage in that the strength and smoothness of the surface of the pixel portion formed by using the composition under the above conditions are improved.

In addition, in order to improve the sensitivity of the yellow curable resin composition, a photopolymerization initiation adjuvant may be further included. By containing the said photoinitiation adjuvant, a sensitivity can further become high and productivity can be improved.

As the photopolymerization initiation adjuvant, 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.

It is preferable to use an aromatic amine compound as the amine compound, and specifically, an aliphatic amine compound such as triethanolamine, methyldiethanolamine, and triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, 4- Dimethylaminobenzoic acid isoamyl, 4-dimethylaminobenzoic acid-2-ethylhexyl, benzoic acid-2-dimethylaminoethyl, N,N-dimethylparatoluidine, 4,4'-bis(dimethylamino)benzophenone (common name: US) healer ketone) or 4,4'-bis(diethylamino)benzophenone.

The carboxylic acid compound is preferably aromatic heteroacetic acid, specifically phenylthioacetic acid, methylphenylthioacetic acid, ethylphenylthioacetic acid, methylethylphenylthioacetic acid, dimethylphenylthioacetic acid, methoxyphenylthioacetic acid, dimethoxyphenylthio and acetic acid, chlorophenylthioacetic acid, dichlorophenylthioacetic acid, N-phenylglycine, phenoxyacetic acid, naphthylthioacetic acid, N-naphthylglycine, or naphthoxyacetic acid.

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-mercaptobutyl rate), pentaerythritol tetrakis (3-mercaptopropionate), dipentaerythritol hexakis (3-mercaptopropionate), or tetraethylene glycol bis (3-mercaptopropionate). can

In addition, as commercially available products, brand names Darocur 1173, Irgacure 184, Irgacure 907, Irgacure 1700 (Ciba), etc. can be used. These can be used individually or in mixture of 2 or more types.

Such a photocationic polymerization initiator can be easily obtained as a commercial item, for example, "Kayarad PCI-220", "Kayarad PCI-620" [see above, manufactured by Nippon Kayaku Co., Ltd. under the trade names, respectively. ], "UVI-6990" [Reference: manufactured by Union Carbide Co., Ltd.], "Adeka Optma SP-150", "Adeka Optma SP-170" [Reference: above, manufactured by ADEKA Corporation], "CI- 5102", "CIT-1370", "CIT-1682", "CIP-1866S", "CIP-2048S", "CIP-2064S" [Reference: above, manufactured by Nippon Soda Co., Ltd.], "DPI-101" , "DPI-102", "DPI-103", "DPI-105", "MPI-103", "MPI-105", "BBI-101", "BBI-102", "BBI-103", " BBI-105", "TPS-101", "TPS-102", "TPS-103", "TPS-105", "MDS-103", "MDS-105", "DTS-102", "DTS- 103" (referred to above, manufactured by Midori Chemical Co., Ltd.), and "PI-2074" (referred to: manufactured by Rhodia), and the like.

In particular, "CI-5102" manufactured by Nippon Soda Co., Ltd. is one of the preferred initiators.

The photopolymerization initiation adjuvant may be used in the same content range as the photopolymerization initiator, and when used in the above content, the sensitivity of the yellow curable resin composition including the photopolymerization initiator is higher, and the productivity of a color filter formed using the composition is improved. provides an effect.

solvent

The yellow curable resin composition according to an embodiment of the present invention may further include a solvent.

The solvent is not particularly limited, and may be an organic solvent commonly used in the art. As long as the solvent is effective in dissolving other components, the solvent used in the conventional yellow curable resin composition may be used without particular limitation, and specifically, ethers, aromatic hydrocarbons, ketones, alcohols, esters or amides, etc. It can be used, more 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 dialkyl ethers such as diethylene glycol dimethyl ether, diethylene glycol diethyl 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 dialkyl ethers such as propylene glycol monomethyl ether; alkylene glycol alkyl ether acetates such as propylene glycol monomethyl 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; esters such as ethyl 3-ethoxypropionate and methyl 3-methoxypropionate; Cyclic esters, such as (gamma)-butyrolactone; and the like. These can be used individually or in mixture of 2 or more types.

Since the solvent may have a different viscosity depending on the coating method or apparatus, the concentration of the yellow curable resin composition having the above-mentioned composition is appropriately adjusted to 5 to 90 wt%, preferably 15 to 80 wt%. This content is in the range selected in consideration of dispersion stability of the composition and ease of processing (eg, coatability) in the manufacturing process.

additive

The yellow curable resin composition according to an embodiment of the present invention may contain fillers, other high molecular compounds, surfactants, adhesion promoters, antioxidants, ultraviolet absorbers, aggregation inhibitors, and curing agents according to the needs of those skilled in the art within the scope not impairing the object of the present invention. It may further include additives such as.

Specific examples of the filler include glass, silica, alumina, and the like.

Specific examples of the other high molecular compounds include curable resins such as epoxy resins and maleimide resins, and thermoplastic resins such as polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether, polyfluoroalkyl acrylate, polyester, and polyurethane. can

The surfactant is a component that improves the film-forming property of the yellow curable resin composition, for example, polyoxyethylene alkyl ethers, polyoxyethylene alkyl ethers, polyethylene glycol diesters, sorbitan fatty esters, fatty acids There are modified polyesters, tertiary amine-modified polyurethanes, polyethyleneimines, etc., as well as KP (manufactured by Shin-Etsu Chemical Co., Ltd.), POLYFLOW (manufactured by Kyoeisha Chemical), EFTOP (manufactured by Tochem Products), MEGAFAC (manufactured by Dainippon Ink Chemical Co., Ltd.), Flourad (manufactured by Sumitomo 3M), Asahi guard, Surflon) (above, manufactured by Asahi Glass Co., Ltd.), SOLSPERSE (manufactured by Zeneca), EFKA (manufactured by EFKA Chemicals, Ltd.), PB 821 (manufactured by Ajinomoto Corporation), and the like.

Examples of the adhesion promoter include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(2-methoxyethoxy)silane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, 3-aminoprotriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2 -(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyl Trimethoxysilane etc. are mentioned.

Specific examples of the antioxidant include 2,2'-thiobis(4-methyl-6-t-butylphenol) and 2,6-di-t-butyl-4-methylphenol.

Specific examples of the ultraviolet absorber include 2-(3-t-butyl-2-hydroxy-5-methylphenyl)-5-chlorobenzothiazole and alkoxybenzophenone. Specific examples of the aggregation inhibitor include sodium polyacrylate.

The curing agent is a component for increasing deep hardening and mechanical strength, and the type thereof is not particularly limited, and examples thereof include an epoxy compound, a polyfunctional isocyanate compound, a melamine compound, and an oxetane compound.

The epoxy compound is not particularly limited, and for example, bisphenol A epoxy resin, hydrogenated bisphenol A epoxy resin, bisphenol F epoxy resin, hydrogenated bisphenol F epoxy resin, novolak epoxy resin, other aromatic epoxy resins, alicyclic family-based epoxy resins, glycidyl ester-based resins, glycidylamine-based resins, or brominated derivatives of these epoxy resins; aliphatic, alicyclic or aromatic epoxy compounds other than epoxy resins and brominated derivatives; butadiene (co)polymer epoxides; isoprene (co)polymer epoxides; glycidyl (meth) acrylate (co) polymer; Triglycidyl isocyanurate etc. are mentioned.

The oxetane compound is not particularly limited, and examples thereof include carbonate bisoxetane, xylenebisoxetane, adipate bisoxetane, terephthalate bisoxetane, and cyclohexanedicarboxylic acid bisoxetane. have.

In addition, in order to further increase the degree of curing, the yellow curable resin composition according to the present invention may further include a curing aid. The usable curing aid is not particularly limited in the present invention, and any curing aid known in the art may be used.

Typically, tertiary amines such as benzyldimethylamine, triethanolamine, triethylenediamine, dimethylaminoethanol, and tri(dimethylaminomethyl)phenol; imidazoles such as 2-methylimidazole and 2-phenylimidazole; organic phosphines such as triphenylphosphine, diphenylphosphine and phenylphosphine; and tetraphenylboron salts such as tetraphenylphosphonium tetraphenylborate and triphenylphosphine tetraphenylborate.

The preparation of the yellow curable composition as described above is not particularly limited in the present invention, and a known method for preparing the curable composition is followed.

For example, the yellow colorant is mixed with a solvent in advance and dispersed using a bead mill or the like until the average particle diameter of the colorant is about 0.2 µm or less. At this time, a pigment dispersant is used as needed, and also some or all of alkali-soluble resin may be mix|blended. To the obtained dispersion (hereinafter sometimes referred to as mill base), a wavelength absorber, the remainder of the alkali-soluble resin, a photopolymerizable compound and a photopolymerization initiator, other components used as necessary, and additional solvents as required at a predetermined concentration It further adds as much as possible, and the target yellow curable resin composition is obtained.

The yellow curable resin composition thus prepared can be used to manufacture a color filter by wet coating, and in this case, a wet coating method includes a roll coater, a spin coater, a slit and spin coater, a slit coater (sometimes referred to as a die coater), inkjet, etc. of the applicator may be used.

<Color filter>

Another aspect of the present invention is a color filter comprising a cured product of the aforementioned yellow curable resin composition.

The pixel layer of the color filter is a self-luminous pixel layer including quantum dots, and in this case, in order to absorb the blue emission spectrum, the yellow colorant is not mixed with the quantum dots in the self-luminous pixel layer, but a separate layer is formed in contact with it. do. That is, the light emitted by the quantum dots emits light of a specific wavelength. At this time, when a yellow colorant is used in the self-emission pixel layer, the self-emissive red, blue, and green colors are not emitted to the outside of the pixel layer. In addition, since the yellow colorant aims to quench the already emitted blue light in red to green, it should be located on the self-luminous pixel layer with respect to the light source, and the effect can be secured when located between the light source and the self-luminous pixel layer. none.

1 is a cross-sectional view of a color filter according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing an arrangement of the color filter with respect to the light source of the present invention.

1 and 2, the color filter includes a substrate 11; a yellow coating layer 13 formed on the substrate 11; and a self-emission pixel layer 15 formed on the yellow coating layer 13 .

At this time, the yellow coating layer 13 is made of the above-described yellow curable resin composition, and more preferably only in the red and green pixel layers 15a and 15b defined by the partition walls 51a, 51b, and 51c as shown in FIG. 2 . However, it is positioned on the opposite side to the light source 101 .

The yellow coating layer 13 shows only green in the green pixel layer 15b in which green and blue are mixed, and only red in the red pixel layer 15a in which red and blue are mixed. As a result, pure green and pure red light are extracted. This makes it possible to improve overall color purity and light efficiency.

The above-described effect largely depends on the amount of the yellow colorant contained in the yellow coating layer 13 , and is also slightly affected by the thickness. For example, the yellow coating layer 13 is formed to a thickness of 1-5 μm. If the thickness is less than the above range, the above-described effects cannot be secured, and even if the thickness exceeds the above range, a great advantage cannot be secured.

In the color filter of the present invention, the substrate may be a substrate of the color filter itself, or may be a portion where the color filter is positioned on a display device, and the like, and is not particularly limited. The substrate may be glass, silicon (Si), silicon oxide (SiO _x ), or a polymer substrate, and the polymer substrate may be polyethersulfone (PES) or polycarbonate (PC).

The self-emission pixel layer 15 is a layer including quantum dots, and the self-luminescence photosensitive resin composition comprising at least one selected from the group consisting of photoluminescence quantum dots, alkali-soluble resins, photopolymerizable compounds, photoinitiators, and solvents. to manufacture and form In this case, the type and content of the alkali-soluble resin, the photopolymerizable compound, the photopolymerization initiator, and the solvent may be as described in the above-mentioned yellow curable resin composition.

The quantum dots are nano-sized semiconductor materials. Atoms form molecules, and molecules form an aggregate of small molecules called clusters to form nanoparticles. When these nanoparticles have semiconductor properties, they are called quantum dots. When the quantum dot receives energy from the outside and reaches an excited state, it emits energy according to a corresponding energy bandgap.

The color filter includes such photoluminescence quantum dot particles, and the color filter prepared therefrom may emit light (photoluminescence) by irradiation with light.

The quantum dot is not particularly limited as long as it is a quantum dot capable of emitting light by stimulation by light, and for example, a group II-VI semiconductor compound; III-V semiconductor compound; IV-VI semiconductor compounds; Group IV element or a compound containing the same; and combinations thereof. These can be used individually or in mixture of 2 or more types.

The II-VI semiconductor compound may be a binary compound selected from the group consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, and mixtures thereof; a triatomic compound selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe and mixtures thereof; and a quaternary compound selected from the group consisting of CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof, wherein the III-V semiconductor compound is GaN , GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and a binary compound selected from the group consisting of mixtures thereof; a ternary compound selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP, and mixtures thereof; and a quaternary compound selected from the group consisting of GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and mixtures thereof; , wherein the IV-VI semiconductor compound is a binary compound selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof; a ternary compound selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof; and a quaternary compound selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof, wherein the group IV element or compound comprising the same is Si, Ge, and mixtures thereof. an elemental compound selected from; and a bi-element compound selected from the group consisting of SiC, SiGe, and mixtures thereof.

In addition, the quantum dot is a homogeneous (homogeneous) single structure; dual structures such as core-shell, gradient structures, and the like; Or it may be a mixed structure thereof.

In the dual structure of the core-shell, the materials constituting each core and the shell may be made of the different semiconductor compounds mentioned above. For example, the core may include one or more materials selected from the group consisting of CdSe, CdS, ZnS, ZnSe, CdTe, CdSeTe, CdZnS, PbSe, AgInZnS, and ZnO, but is not limited thereto. The shell may include at least one material selected from the group consisting of CdSe, ZnSe, ZnS, ZnTe, CdTe, PbS, TiO, SrSe, and HgSe, but is not limited thereto.

Just as the colored photosensitive resin composition used for manufacturing a conventional color filter contains red, green, and blue colorants for color realization, the color filter of the present invention also has quantum dots representing red, quantum dots representing green, and quantum dots representing blue. It may include, and may be at least one selected from the aforementioned red, green, blue, and combinations thereof.

The quantum dots may be synthesized by a wet chemical process, an organometallic chemical vapor deposition process, or a molecular beam epitaxy process.

The wet chemical process is a method of growing particles by adding a precursor material to an organic solvent. When the crystal is grown, the organic solvent is naturally coordinated on the surface of the quantum dot crystal and acts as a dispersant to control the growth of the crystal. It is possible to control the growth of nanoparticles through an easier and cheaper process than vapor deposition such as beam epitaxy.

The self-luminous photosensitive resin composition comprising such quantum dots is within 100% by weight of the total composition, 3 to 80% by weight of quantum dots, 5 to 80% by weight of alkali-soluble resin, 5 to 70% by weight of photopolymerizable compound, 0.1 to 20% by weight of photopolymerization initiator % may be included. In addition, it may further include an additive as described above.

The color filter may be manufactured by the following method as an example, but is not limited thereto, and the order of each step described below may be changed according to a designer's needs (see FIGS. 1 and 2 ).

S1) forming a yellow coating layer 13 on the substrate 11;

S2) forming partition walls 51a, 51b, and 51c defining red and green pixel regions 15a and 15b on the yellow coating layer 13; and

S3) The self-emission pixel layer 15 is formed in the pixel region.

The barrier ribs 51a, 51b, and 51c, the self-luminous pixel layer 15, and the yellow coating layer 13 may be formed by applying each composition and then exposing, developing, and curing the composition in a predetermined pattern.

If necessary, the color filter may further include a black matrix.

<Image display device>

In addition, another aspect of the present invention is an image display device including the color filter.

The color filter can be applied to various image display devices, such as an electroluminescence display, a plasma display, and a field emission display, as well as a general liquid crystal display.

The image display device may include a color filter including a red pattern layer containing red quantum dot particles, a green pattern layer containing green quantum dot particles, and a blue pattern layer containing blue quantum dot particles. In such a case, when applied to an image display device, the emission light of the light source is not particularly limited, but a light source emitting blue light may be preferably used in terms of superior color reproducibility.

According to another embodiment of the present invention, the image display device of the present invention may include a color filter including only two color pattern layers among a red pattern layer, a green pattern layer, and a blue pattern layer. In such a case, the color filter further includes a transparent pattern layer that does not contain quantum dot particles.

When only two types of color pattern layers are provided, a light source emitting light of a wavelength indicating the remaining colors not included may be used. For example, when a red pattern layer and a green pattern layer are included, a light source emitting blue light may be used. In such a case, the red quantum dot particles emit red light, the green quantum dot particles emit green light, and the transparent pattern layer transmits the blue light as it is to display blue color.

The image display device exhibits high luminance due to excellent light efficiency and excellent color reproducibility.

Hereinafter, examples will be given to describe the present specification in detail. However, the embodiments according to the present specification may be modified in various other forms, and the scope of the present specification is not to be construed as being limited to the embodiments described below. The embodiments of the present specification are provided to more completely explain the present specification to those of ordinary skill in the art. In addition, "%" and "part" indicating the content hereinafter are based on weight unless otherwise specified.

production example 1 to 4

production example One: CdSe / ZnS core shell structural Photoluminescence green quantum dots synthesis of particles

0.4 mmol of CdO, 4 mmol of zinc acetate, and 5.5 mL of oleic acid were placed in a reactor together with 20 mL of 1-octadecene and heated to 150° C. to react. Thereafter, in order to remove acetic acid generated by the substitution of oleic acid for zinc, the reactant was left under vacuum of 100 mTorr for 20 minutes.

Then, heat at 310°C was applied to obtain a transparent mixture, which was maintained at 310°C for 20 minutes, and then 0.4 mmol of Se powder and 2.3 mmol of S powder were dissolved in 3 mL of trioctylphosphine. And S solution was rapidly injected into the reactor containing the Cd(OA) ₂ and Zn(OA) ₂ solution.

The resulting mixture was grown at 310° C. for 5 minutes, and then growth was stopped using an ice bath.

Then, by precipitation with ethanol to separate the quantum dots using a centrifuge and washing off excess impurities using chloroform and ethanol, the particles stabilized with oleic acid, the sum of the core particle size and the shell thickness, are 3 to 5 nm. Green quantum dot particles having a CdSe (core)/ZnS (shell) structure were obtained.

production example 2: Synthesis of alkali-soluble resin

A flask equipped with a stirrer, a thermometer reflux cooling tube, a dropping funnel and a nitrogen introduction tube was prepared, while 45 parts by weight of N-benzylmaleimide, 45 parts by weight of methacrylic acid, 10 parts by weight of tricyclodecyl methacrylate, t -Butylperoxy-2-ethylhexanoate 4 parts by weight, propylene glycol monomethyl ether acetate 40 parts by weight, stirred and mixed to prepare a monomer dropping lot, n-dodecanediol 6 parts by weight, propylene glycol monomethyl ether 24 parts by weight of acetate was added and mixed with stirring to prepare a chain transfer agent dropping lot.

Then, 395 parts by weight of propylene glycol monomethyl ether acetate 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.

Then, the monomer and the chain transfer agent were started dripping from the dropping lot. The dripping proceeds for 2 hours while maintaining 90°C, and after 1 hour, the temperature is raised to 110°C and maintained for 3 hours, and then a gas introduction tube is introduced, and a bubble of oxygen/nitrogen=5/95 (v/v) mixed gas ring started.

Then, 10 parts by weight of glycidyl methacrylate, 0.4 parts by weight of 2,2'-methylenebis(4-methyl-6-t-butylphenol), and 0.8 parts by weight of triethylamine were put into the flask, and the flask was heated at 110° C. for 8 hours. The reaction was continued, and thereafter, while cooling to room temperature, alkali-soluble resin having a solid content of 29.1% by weight, a weight average molecular weight of 32,000, and an acid value of 114 mgKOH/g was obtained.

production example 3: self-luminescence pixel layer to form self-luminescence Preparation of photosensitive resin composition

After mixing the components as shown in Table 1 below, the mixture was diluted with propylene glycol monomethyl ether acetate so that the total solid content was 20% by weight, and then sufficiently stirred to obtain a self-luminous photosensitive resin composition.

Composition (wt%) Preparation 3-1 Production Example 3-2 quantum dots 1-1 ¹⁾ 30 - 1-2 ²⁾ - 30 Photopolymerizable compound ^{3 )} 30 30 polymerization initiator ^{4 )} 5 5 Alkali-soluble resin ^{5 )} 35 35 1) CdSe (core)/ZnS (shell) structure quantum dots of Preparation Example 1
2) Lumidot ^TM CdSe/ZnS 640 (manufactured by Aldrich)
3) Dipentaerythritol pentaacrylate succinic acid monoester (TO-1382, manufactured by Dong-A Synthesis)
4)Irgacure-907 (manufactured by Ciba)
5) Alkali-soluble resin of Preparation Example 2

Example 1 to 6 and comparative example 1 to 2

After mixing the components as shown in Table 2 below, the mixture was diluted with propylene glycol monomethyl ether acetate so that the total solid content was 20% by weight, and then sufficiently stirred to obtain a yellow curable resin composition.

Composition (wt%) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Comparative Example 2 yellow
coloring agent A1-1 ¹⁾ 29 28 25 - - - 30 - A1-2 ²⁾ - - - 29 28 25 - 30 wavelength
absorbent A2-1 ³⁾ One 2 5 - - - - - A2-2 ⁴⁾ - - - One 2 5 - - Photopolymerizable compound ^{5 )} 30 30 30 30 30 30 30 30 photopolymerization initiator ^{6 )} 5 5 5 5 5 5 5 5 Alkali-soluble resin ^{7 )} 35 35 35 35 35 35 35 35 1) CI Pigment Yellow 138 (manufactured by Toyo Ink)
2) CI Pigment Yellow 185 (manufactured by BASF)
3) CA-590 (manufactured by Gyeongin Corporation)
4) BD-590 (manufactured by Gyeongin Corporation)
5) Dipentaerythritol pentaacrylate succinic acid monoester
(5-functional photopolymerizable compound containing carboxylic acid) (TO-1382, manufactured by Dong-A Synthesis)
6) Irgacure-907 (manufactured by Ciba)
7) Alkali-soluble resin of Preparation Example 2

Experimental example 1: Test of transmission characteristics of yellow curable resin composition

In order to confirm the transmission characteristics of the yellow curable resin compositions prepared in Examples 1 to 6 and Comparative Examples 1 to 2, it was carried out as follows.

First, each composition was coated on a glass substrate by spin coating, then placed on a heating plate and maintained at a temperature of 100° C. for 3 minutes to form a thin film.

Then, using an ultra-high pressure mercury lamp (trade name: USH-250D) manufactured by Ushio Denki Co., Ltd., it was irradiated with light at an exposure dose (365 nm) of 200 mJ/cm 2 in an atmospheric atmosphere, and no special optical filter was used. Then, it was heated in a heating oven at 150° C. for 10 minutes to prepare a yellow coating layer with a thickness of 2 μm.

Transmittance of the prepared yellow coating layer was measured using an Olympus spectrometer OPS-200, and the obtained results are shown in Table 3 below.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Comparative Example 2 T% (λ=590 nm) 40.5 37.9 30.1 41.1 36.9 28.3 96.4 97.0 T% (λ = 570 nm) 80.5 78.8 69.2 81.4 76.4 64.8 97.8 97.7 T% (λ = 610 nm) 76.9 75.0 66.8 77.8 73.2 62.1 98.6 98.7

Referring to Table 3, in the case of the yellow coating layer (Examples 1 to 6) prepared from the yellow curable resin composition of the present invention, the yellow coating layer is not prepared from the yellow curable resin composition of the present invention by including the wavelength absorber of the present invention. (Comparative Examples 1 to 2) It can be seen that the transmittance is decreased due to an increase in wavelength absorption than in the case of (Comparative Examples 1 and 2).

production example 4: Manufacture of color filter

production example 4-1 to 4-6 and production example 4-13 to 4-14

(1) Formation of yellow coating layer

First, the yellow curable resin compositions of Examples 1 to 6 and Comparative Examples 1 and 2 were coated on a glass substrate (Corning® EAGLE XG® Slim, Corning) of a size of 100 × 100 mm by spin coating, then placed on a heating plate and placed on a 100 A thin film was formed by maintaining at a temperature of ℃ for 3 minutes.

Then, using an ultra-high pressure mercury lamp (trade name: USH-250D) manufactured by Ushio Denki Co., Ltd., it was irradiated with light at an exposure dose (365 nm) of 200 mJ/cm 2 in an atmospheric atmosphere, and no special optical filter was used.

The thin film irradiated with ultraviolet light was developed by immersing it in a developing solution of an aqueous KOH solution having a pH of 10.5 for 80 seconds. The glass plate coated with this thin film was washed with distilled water, dried by blowing nitrogen gas, and heated in a heating oven at 150° C. for 10 minutes to form a 2 μm thick yellow coating layer.

(2) Formation of self-luminous pixel layer

Using the self-luminous photosensitive resin composition prepared in Preparation Example 3-1, in the same manner as in (1), a 5 μm-thick self-luminous pixel layer was formed on each yellow coating layer prepared in (1). Thus, Preparation Examples 4-1 to 4-6 and Preparation Examples 4-13 to 4-14 were prepared.

production example 4-7 to 4-12 and production example 4-15 to 4-16

A color filter was prepared in the same manner as in Preparation Examples 4-1 to 4-6 and Preparation Examples 4-13 to 4-14, but the self-luminous photosensitive resin composition for forming the self-luminous pixel layer was prepared in Preparation Example 3-2. To prepare Preparation Examples 4-7 to Preparation 4-12 and Preparation Examples 4-15 to 4-16.

Experimental example 2: Measurement of luminous intensity of color filters

The emission intensity of the color filter prepared in Preparation Example 4 was measured as follows.

The light-converted region was measured using XLamp® XRE-Roy (Royal blue) manufactured by Cree having a maximum absorption wavelength of 450 nm as a blue light source, and the blue light source was disposed in a direction opposite to the yellow coating layer, and Preparation Examples 4-1 to In 4-6 and Preparation Examples 13 to 14, the light source region at 450 nm and the light conversion region at 520 nm, and Preparation Examples 4-7 to 4-12 and Preparation Examples 15 to 16 at the light source region at 450 nm and the light conversion region at 640 nm The luminescence intensity was measured using an Ocean Optics spectrometer.

The results obtained are shown in Table 4 below, wherein the measured intensity of 450 nm of the light source region is small, and the higher the intensity value of 520 nm or 640 nm of the light emitting region, the better the color purity and the excellent luminescence characteristics.

result yellow
coating layer self-luminescence
pixel layer Luminescence Intensity 450nm (blue) 520nm (green) 640nm (red) Preparation 4-1 Example 1 Preparation 3-1 35 39,940 - Preparation 4-2 Example 2 Preparation 3-1 20 45,940 - Preparation 4-3 Example 3 Preparation 3-1 17 42,950 - Preparation 4-4 Example 4 Preparation 3-1 24 41,940 - Preparation 4-5 Example 5 Preparation 3-1 13 45,130 - Preparation 4-6 Example 6 Preparation 3-1 18 43,130 - Preparation 4-7 Example 1 Production Example 3-2 48 - 39,130 Preparation 4-8 Example 2 Production Example 3-2 43 - 42,130 Preparation 4-9 Example 3 Production Example 3-2 40 - 43,130 Preparation 4-10 Example 4 Production Example 3-2 48 - 40,130 Preparation 4-11 Example 5 Production Example 3-2 41 - 43,130 Preparation 4-12 Example 6 Production Example 3-2 32 - 43,930 Preparation 4-13 Comparative Example 1 Preparation 3-1 120 29,400 - Preparation 4-14 Comparative Example 2 Preparation 3-1 80 27,300 - Preparation 4-15 Comparative Example 1 Production Example 3-2 130 - 28,400 Preparation 4-16 Comparative Example 2 Production Example 3-2 420 - 25,600

Referring to Table 4, in the case of the color filter including the yellow coating layer of Examples 1 to 6 containing the wavelength absorber of the present invention (Preparation Examples 4-1 to 4-12), the emission intensity of 450 nm in the blue light source region is It was confirmed that the blocking characteristics were excellent at 50 or less, the emission intensity of 520 nm in the green emission region was 40,000 or more, and the emission intensity of 640 nm in the red emission region was 35,000 or more, confirming that the emission characteristics were also excellent.

In comparison, in the case of the color filter including the yellow coating layer of Comparative Examples 1 and 2 that does not contain the wavelength absorber of the present invention (Preparation Examples 4-13 to 4-16), the emission intensity at 450 nm in the blue light source region is 80 As described above, it can be seen that there is a problem in that the blocking properties are deteriorated, and the emission intensity of 520 nm in the green emission region and the emission intensity of 640 nm in the red emission region are significantly lowered to 30,000 or less.

11: Write
13: yellow coating layer
15: self-luminous layer
15a: red pixel area
15b: green pixel area
51a, 51b, 51c: bulkhead
101: light source

Claims (9)

yellow colorant; and a wavelength absorber having a maximum absorption wavelength of 560 to 620 nm and satisfying the transmission characteristics of Equation 1 below; a yellow curable resin composition comprising:
[Equation 1]
10% ≤ T(λ) ≤ 60%
T(λ-20nm) ≥ 60%
T(λ+20nm) ≥ 60%
(In Equation 1 above,
T is the transmittance (%), and λ is a wavelength selected from 560 to 620 nm). According to claim 1,
The yellow curable resin composition further comprises at least one selected from the group consisting of alkali-soluble resins, photopolymerizable compounds, photoinitiators, solvents and additives. According to claim 1,
The wavelength absorber is a yellow curable resin composition comprising a compound represented by the following formula (1).
[Formula 1]

(In Formula 1,
M is Cu or Zn,
X ₁ is a halogen element selected from the group consisting of F, Cl and Br, n is an integer from 0 to 5,
R ₁ to R ₄ are each independently selected from the group consisting of methyl, ethyl, propyl, isopropyl and tert-butyl). According to claim 1,
The yellow colorant is a yellow curable resin composition that is included in an amount of 5 to 80% by weight, based on 100% by weight of the total amount of the yellow curable resin composition. According to claim 1,
The wavelength absorber is a yellow curable resin composition that is included in an amount of 1 to 30% by weight based on 100% by weight of the total amount of the yellow curable resin composition. A yellow coating layer comprising a cured product of the yellow curable resin composition of any one of claims 1 to 5; and a self-luminous pixel layer formed on the yellow coating layer and containing quantum dots. 7. The method of claim 6,
The yellow coating layer is a color filter formed on the red pixel layer to the green pixel layer. An image display device comprising the color filter of claim 6. 9. The method of claim 8,
The color filter is an image display device in which the yellow coating layer is disposed in a direction opposite to the light source.

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