TWI725261B - Yellow curable resin composition, and color filter and image display device comprising the same - Google Patents

Abstract

The present invention relates to a yellow curable resin composition including a yellow colorant; and a wavelength-absorbing material having a maximum absorbable wavelength of 560 to 620 nm and satisfying particular transmission characteristics. When used to produce an image display device employing a blue-light emitting source, the yellow curable resin composition can prevent color mixing in a red or green pixel layer and thus can improve color reproducibility and enhance luminous efficacy. In addition, the present invention relates to a color filter and an image display device that are produced using the yellow curable resin composition.

Description

Yellow curable resin composition and color filter and image display device containing the same

The present invention relates to a yellow curable resin composition with improved color reproducibility, and a color filter and an image display device manufactured using the composition.

Color filters are thin-film optical components that can extract three colors (ie, red (R), green (G), and blue (B)) from white light and form them into fine pixels.

The color filter has a structure in which a transparent substrate, a black matrix layer, and pixel regions are stacked together in sequence. The black matrix layer is formed on the transparent substrate in a predetermined pattern to shield the boundary between the pixels. When illuminated, the pixel regions are composed of two or more of the three primary colors (usually red, green, and blue) of each pixel arranged in a predetermined order.

Generally speaking, color filters can be manufactured by applying three or more colors on a transparent substrate by a dyeing method, an electrodeposition method, a printing method, a pigment dispersion method, or the like. In recent years, a pigment dispersion method based on a pigment-dispersed photosensitive resin is most commonly used.

Among the methods listed above, the pigment dispersion method is a method of forming a colored film by repeating a series of processes. The series of processes include colorants, alkali-soluble resins, photopolymerizable monomers, and photopolymerizable The photosensitive resin composition of the initiator, epoxy resin, solvent and one or more other additives is applied to a transparent substrate provided with a black matrix to expose the pattern to be formed, and the unexposed part is removed with a solvent and thermally cured And this method is actively used in the manufacture of liquid crystal displays (LCD) for mobile phones, notebook computers, monitors, televisions, etc.

Recently, photosensitive resin compositions used in pigment dispersion methods with various advantages for manufacturing color filters are required to have excellent patterning characteristics, high color reproducibility and high performance characteristics, such as high Brightness, high contrast, etc.

However, its fundamental limitation is that during the color reproduction process where the light emitted from the light source passes through the color filter for color implementation, part of the light is absorbed by the color filter during the transmission process, resulting in a decrease in luminous efficacy. In addition, due to the pigment characteristics of the color filter, perfect color reproduction cannot be achieved.

In order to solve these problems, a color filter based on a quantum dot photosensitive resin composition has been proposed.

Korean Published Patent Application No. 2007-0094679 discloses that the use of a color filter layer including quantum dots can improve color reproducibility, and Korean Published Patent Application No. 2009-0036373 discloses that the use of fluorescent materials including quantum dots emits light. The layer replaces the existing color filter to make the luminous efficiency higher, thereby achieving better display quality.

When quantum dots are used as the light-emitting material of the color filter as described above, a light-emitting waveform with a shorter wavelength can be generated, color implementation can be achieved at a level higher than that of pigments, and excellent Brightness properties. However, due to the low stability of the quantum dots used to manufacture the color filter, crystals etc. are formed on the surface of the quantum dots, so that the luminous efficacy of the quantum dots is significantly reduced.

In particular, an image display device equipped with a quantum dot color filter adopts a blue light emitting source, in which blue light is mixed with light spontaneously generated by a red pixel layer, a green pixel layer, and a blue pixel layer. Although there is no problem in the blue pixel layer, such color mixing of light makes it difficult for the red pixel layer to emit pure red light and the green pixel layer to emit pure green light. For example, when a blue light emitting source is used, the blue light generated by the blue light emitting source has a peak at 380 nm to 400 nm, while the quantum dots included in the green pixel layer are at 500 nm to 550 nm. Generate peaks, thereby reducing the color purity of the color filter.

Therefore, there is a limitation in reproducing desired colors, resulting in poor image quality.

(Prior technical literature)

(Patent Document)

(Patent Document 1): Korean Published Patent Application No. 2007-0094679 (September 21, 2007)

(Patent Document 2): Korean Published Patent Application No. 2009-0036373 (April 14, 2009)

The present invention is designed to solve the above-mentioned problems, and aims to provide a yellow curable resin composition for manufacturing color filters and image display devices with improved color reproducibility and enhanced luminous efficacy.

In addition, the present invention aims to provide a color filter and an image display device. The color filter and the image display device exhibit improved color reproducibility and enhancement due to including the cured product of the yellow curable resin composition The luminous efficacy.

T(λ)

60%；T(λ-20nm)

60%；且T(λ+20nm)

60%，其中在數學表達式1中，T為透射率(%)且λ為560奈米與620奈米之間的波長。 In order to achieve the above-mentioned object, the yellow curable resin composition according to the present invention includes a yellow colorant; and a wavelength absorbing material having a maximum absorbable wavelength of 560 nm to 620 nm and satisfying the following mathematical expression 1 Described transmission characteristics: [Mathematical expression 1] 10%

T(λ)

60%; T(λ-20nm)

60%; and T(λ+20nm)

60%, where in Mathematical Expression 1, T is the transmittance (%) and λ is the wavelength between 560 nm and 620 nm.

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

In addition, the image display device according to the present invention includes the color filter.

The advantage of the yellow curable resin composition according to the present invention is that it can be used to manufacture color filters and image display devices that exhibit improved color reproducibility and enhanced luminous efficacy.

In addition, the color filter and the image display device including the cured product of the yellow curable resin composition according to the present invention are advantageous in that they exhibit improved color reproducibility and enhanced luminous efficacy.

11‧‧‧Substrate

13‧‧‧Yellow coating

15‧‧‧Self-luminous pixel layer

15A‧‧‧Red pixel layer

15B‧‧‧Green pixel layer

51A, 51B, 51C‧‧‧Partition wall

101‧‧‧Light source

Fig. 1 is a cross-sectional view for explaining a color filter according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view for explaining the position of the color filter relative to the light source according to the present invention.

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

In describing the present invention, when it is mentioned that one member is "being on" another member, this not only covers the situation where two members are in contact with each other, but also covers the presence of a third member between the two members. Situation.

In describing the present invention, when a component is referred to as “containing”, “including”, “comprising” or “having” another component, It should be understood that this component does not exclude other components, but may also include other components unless specifically stated otherwise.

<Yellow curable resin composition>

The yellow curable resin composition according to one aspect of the present invention includes a yellow colorant; and a wavelength absorbing material having a maximum absorbable wavelength of 560 nm to 620 nm and satisfying the following mathematical expression 1 described Transmission characteristics. Therefore, the yellow curable resin composition can be used to manufacture color filters and image display devices that exhibit improved color reproducibility and enhanced luminous efficacy.

T(λ)

60%；T(λ-20nm)

60%；且T(λ+20nm)

60%，其中在數學表達式1中，T為透射率(%)且λ為560奈米與620奈米之間的波長。 [Mathematical Expression 1] 10%

T(λ)

60%; T(λ-20nm)

60%; and T(λ+20nm)

60%, where in Mathematical Expression 1, T is the transmittance (%) and λ is the wavelength between 560 nm and 620 nm.

Yellow colorant

According to one aspect of the present invention, the yellow curable resin composition includes a yellow colorant.

Different from color filters containing pigments, quantum dot-based color filters emit self-luminescence, and include a self-luminous pixel layer formed in the pixel area, which can emit spontaneous red Light, green light and blue light. The self-luminous pixel layer has a self-luminous characteristic, which is the ability to absorb irradiated light and then emit red, blue, and green light by itself. That is, when red quantum dots, blue quantum dots, and green quantum dots are irradiated with light, red light emission occurs at 600 nm to 700 nm, and green light emission occurs at 490 nm to 590 nm. And blue light emission occurs from 400 nm to 480 nm, thereby realizing full color. In this case, the blue light source is used as the light source of the image display device equipped with color filters, resulting in color mixing in the self-luminous pixel layer. For example, there is also a blue emission spectrum of 400 nm to 480 nm. Seen in the emission spectra of the red and green self-luminous pixel layers. This kind of color mixing is especially serious in the red pixel layer and the green pixel layer.

In order to prevent the above problems, a yellow coating is provided on the red pixel layer and the green pixel layer, and the yellow coating is a cured product of a yellow curable resin composition including a yellow colorant. In this way, only green is displayed on the green pixel layer mixed with green and blue, and only red is displayed on the red pixel layer mixed with red and blue, so that pure green light and pure red light can be extracted, Thereby improving the color purity and luminous efficacy of self-luminescence.

The yellow colorant is not limited to a specific type, and any conventional yellow colorant such as any pigment, dye, or colorant can be used as the yellow colorant.

Specifically, the yellow coloring agent may be a coloring agent having a color index (Colour Index ^™ , CI; issued by the Society of Dyers and Colourists) code, as listed below. However, in order to reduce the environmental impact and consider the impact on the human body, the yellow colorant is preferably a halogen-free coloring agent. More specifically, any of the following can be used as the yellow colorant, but the present invention is not limited to this.

Monoazo pigments: CI Pigment Yellow 1, CI Pigment Yellow 2, CI Pigment Yellow 5, CI Pigment Yellow 8, CI Pigment Yellow 105, CI Pigment Yellow 120, CI Pigment Yellow 150, CI Pigment Yellow 168, CI Pigment Yellow 182, CI Pigment Yellow 183, CI Pigment Yellow 190; Pyrazolinone Azo Pigment: CI Pigment Yellow 10; Diazo Pigment: CI Pigment Yellow 12, CI Pigment Yellow 16, CI Pigment Yellow 63, CI Pigment Yellow 83, CI Pigment Yellow 126, CI Pigment Yellow 127, CI Pigment Yellow 128, CI Pigment Yellow 152, CI Pigment Yellow 170, CI Pigment Yellow 188; Azomethine Pigment: CI Pigment Yellow 101, CI Pigment Yellow 129; Anthraquinone Pigment: CI Pigment Yellow 108, CI Pigment Yellow 147, CI Pigment Yellow 193, CI Pigment Yellow 197, CI Pigment Yellow 199, CI Pigment Yellow 202; Isoindolinone pigments: CI Pigment Yellow 109, CI Pigment Yellow 110, CI Pigment Yellow 139, CI Pigment Yellow 173, CI Pigment Yellow 185; Quinoline Pigment: CI Pigment Yellow 115; Quinophthalone Pigment: CI Pigment Yellow 138; Polycyclic Pigment: CI Pigment Yellow 148; Dioxime Pigment: CI Pigment Yellow 153; Benzene Benzimidazolone pigments: CI Pigment Yellow 154, CI Pigment Yellow 175, CI Pigment Yellow 180, CI Pigment Yellow 181; Heterocyclic Pigments: CI Pigment Yellow 192; Perinone Pigments: CI Pigment Yellow 196; Inorganic Pigments: CI Pigment Yellow 30, CI Pigment Yellow 31, CI Pigment Yellow 32, CI Pigment Yellow 119, CI Pigment Yellow 157, CI Pigment Yellow 162, CI Pigment Yellow 184.

Cyanine pigments can be used; xanthene pigments; merocyanine pigments; dipyrrin pigments; arylmethine pigments; acridine pigments; coumarin pigments; Oxazine pigments; and tetrapyrrole pigments, etc., but the present invention is not limited thereto.

In some cases, the pigments listed above may be pre-treated with rosin, surface treatment using pigment derivatives into which acidic or basic groups are introduced, surface grafting treatment using polymer compounds, etc., Fine particle treatment of sulfuric acid, washing treatment using organic solvents or water, etc.

Among the examples of yellow colorants listed above, C.I. Pigment Yellow 185 is particularly preferably used.

According to an embodiment of the present invention, based on 100% by weight of the total solid content in the entire yellow curable resin composition, the content of the yellow colorant is 5 to 80% by weight, and preferably 10 to 50% by weight. weight%. It is recommended that the yellow colorant be used appropriately within the range provided above, because when the content of the yellow colorant is less than this range, the effects of color purity enhancement and luminous efficacy improvement by blocking blue light cannot be achieved, and The use of the yellow colorant in an amount exceeding this range does not significantly increase the desired effect and is therefore uneconomical.

The described pigments can be used together with dispersing agents or dispersing aids as needed.

As the dispersant, suitable dispersants, such as cationic/anionic/nonionic dispersants, etc., can be used, but polymer dispersants are preferred. Specific examples thereof include acrylic copolymers, polyurethanes, polyesters, and polyethylene. Amine and polyallylamine. The dispersant can be a commercially available dispersant, such as DisperBYK-2000, DisperBYK-2001, BYK-LPN6919, and BYK-LPN21116 (BYK Additives & Instruments) as acrylic copolymers and Solsperse 5000 (the Lubrizol Corporation); DisperBYK-161, DisperBYK-162, DisperBYK-163, DisperBYK-165, DisperBYK-167, DisperBYK-170, and DisperBYK-182 as polyurethane Chemical Auxiliary and Instrument Division) and Solsperse 76500 (The Lubrizol Corporation); Solsperse 24000 (The Lubrizol Corporation) as polyethyleneimine; and AJISPER PB821, AJISPER PB822 and AJISPER PB880 (Ajinomoto) as polyester Ajinomoto Fine-Techno Co., Inc.).

The dispersing aid is, for example, a pigment derivative, and specifically, may be copper phthalocyanine, diketopyrrolopyrrole, a sulfonic acid derivative of quinoline yellow, and the like.

The dispersant may be used alone or in a combination of two or more. Based on 1 part by weight of the yellow colorant, the content of the dispersant may generally be 1 part by weight or less, preferably 0.1 parts by weight to 0.7 parts by weight, and more preferably 0.05 parts by weight to 0.5 parts by weight. When the content of the dispersant is too large, it may adversely affect the developability.

Wavelength absorbing material

According to one aspect of the present invention, the yellow curable resin composition includes a wavelength absorbing material that has a maximum absorbable wavelength of 560 nm to 620 nm and satisfies the transmission characteristics described in the following mathematical expression 1.

T(λ)

60%；T(λ-20nm)

60%；且 T(λ+20nm)

60%，其中在數學表達式1中，T為透射率(%)且λ為560奈米與620奈米之間的波長。 [Mathematical Expression 1] 10%

T(λ)

60%; T(λ-20nm)

60%; and T(λ+20nm)

60%, where in Mathematical Expression 1, T is the transmittance (%) and λ is the wavelength between 560 nm and 620 nm.

As described above, the self-luminous pixel layer included in the color filter has a self-luminous characteristic, which is the ability to absorb irradiated light and then emit red, blue, and green light by itself. That is, when red quantum dots, blue quantum dots, and green quantum dots are irradiated with light, red light emission occurs at 600 nm to 700 nm, and green light emission occurs at 490 nm to 590 nm. And blue light emission occurs under 400nm to 480nm, so as to achieve full color. In this case, when the actual wavelength range of the generated red or green light deviates from the above range, color mixing of red or green light and blue light may occur.

In order to solve this problem, the yellow curable resin composition according to the present invention includes a wavelength absorbing material having a maximum absorbable wavelength in the range of 560 nm to 620 nm and satisfying the transmission described in Mathematical Expression 1. characteristic. In this way, it is possible to prevent the color mixing of red or green light and blue light, thereby obtaining a color filter with improved color reproducibility.

The wavelength absorbing material is not limited to a specific type as long as it has a maximum absorbable wavelength in the range of 560 nm to 620 nm and satisfies the transmission characteristics described in Mathematical Expression 1.

According to an embodiment of the present invention, the wavelength absorbing material may include a compound represented by the following structural formula 1.

[Structural formula 1]

Wherein in structural formula 1, M is copper or zinc; X ₁ is a halogen element selected from the group consisting of fluorine, chlorine and bromine; n is an integer from 0 to 5; and R ₁ to R ₄ are each independently selected from The group consisting of methyl, ethyl, propyl, isopropyl and tertiary butyl.

More specifically, the compound represented by Structural Formula 1 can be any of the following compounds:

[Structural formula 2-2]

[Structural formula 2-5]

[Structural formula 3-3]

As the wavelength absorbing material, commercially available wavelength absorbing materials can be used. Although specific examples of these materials include BD-590 and CA-590 from Kyung-In Synthetic Corporation, the present invention is not limited thereto.

Based on 100% by weight of the total solid content in the yellow curable resin composition, the content of the wavelength absorbing material may be 1% to 30% by weight, preferably 1% to 20% by weight, and more preferably 1% by weight % To 10% by weight. When the content of the wavelength absorbing material is lower than the range provided above, color mixing of light may occur in the wavelength range corresponding to red light emission and green light emission, which may result in low luminous efficacy. On the other hand, when the content of the wavelength absorbing material exceeds the above range, the pattern stability may be adversely affected.

According to an embodiment of the present invention, the yellow curable resin composition may further include one selected from the group consisting of an alkali-soluble resin, a photopolymerizable compound, a photopolymerizable initiator, a solvent, and an additive. More.

Alkali soluble resin

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

Alkali-soluble resins are thermally reactive, soluble in alkalis, and act as dispersion media for solids such as colorants, and also act as binder resins. As the alkali-soluble resin, any binder resin that is soluble in an alkaline developer used in forming a developed film in film formation using a resin composition can be used.

Alkali-soluble resins can have an acid value of 20 (KOH mg/g) to 200 (KOH mg/g), where the acid value refers to the amount of potassium hydroxide required to neutralize 1 gram of acrylic polymer (in mg ) And is about solubility. When the acid value of the alkali-soluble resin is lower than the above range, a sufficiently high development rate may not be ensured. On the other hand, when the acid value of the alkali-soluble resin exceeds the above-provided range, the adhesion of the alkali-soluble resin to the substrate is reduced, resulting in a high possibility of short circuits in the pattern, and the storage stability of the entire composition is reduced. This leads to an increase in viscosity.

In addition, the weight average molecular weight of the alkali-soluble resin is preferably 3000 Daltons (Da) to 200,000 Daltons, and more preferably 5000 Daltons to 100,000 Daltons, and can be purchased from the manufacturer or tested in experiments. The chamber is prepared by polymerization so that the resin has a molecular weight distribution in the range of 1.5 to 6.0, and preferably in the range of 1.8 to 4.0, for the color filter. The advantage of the alkali-soluble resin with the molecular weight and molecular weight distribution within the range provided above is that it has improved hardness and high residual film rate, the unexposed part of the resin is highly soluble in the developer, and the resin can help improve Resolution.

The alkali-soluble resin may be an acrylic monomer having an unsaturated double bond. A dispersing resin having a suitable acid value can be prepared by copolymerizing the first monomer having an unsaturated bond and a carboxyl group listed below with another monomer having an unsaturated bond and copolymerizable with the first monomer.

Specific examples of monomers having unsaturated bonds and carboxyl groups include monocarboxylic acids, such as acrylic acid, methacrylic acid, and crotonic acid; dicarboxylic acids, such as fumaric acid, mesaconic acid, and itaconic acid; Acid anhydrides; and mono(meth)acrylates of polymers having carboxyl and hydroxyl groups at each end, such as ω-carboxy polycaprolactone mono(meth)acrylate.

More specifically, the monomer with unsaturated bond and carboxyl group can be acrylic acid, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, fumaric acid, maleic acid alkyl ester, etc., among which maleic acid Alkyl esters can be monomethyl maleate, ethyl maleate, n-propyl maleate, isopropyl maleate, n-butyl maleate, n-hexyl maleate, n-octyl maleate Ester, 2-ethylhexyl maleate, n-nonyl maleate, n-dodecyl maleate, etc.

Each of the monomer having an unsaturated bond and a carboxyl group and a monomer copolymerizable with the first monomer may be used alone or in a combination of two or more.

As the monomer copolymerizable with the first monomer, a monomer selected from the group consisting of aromatic vinyl compounds, unsaturated carboxylic acid ester compounds, unsaturated carboxylic acid amino alkyl ester compounds, and Saturated glycidyl carboxylate compounds, vinyl carboxylate compounds, unsaturated ether compounds, acrylonitrile compounds, unsaturated imine compounds, aliphatic conjugated diene compounds, monoacrylic acid groups or monoacrylic acid groups at the end of the molecular chain Methacrylic acid-based macromonomers, bulky monomers and mixtures thereof.

Specifically, the monomer copolymerizable with the first monomer may be an aromatic vinyl compound, such as styrene, vinyl toluene, α-methylstyrene, p-chlorostyrene, o-methoxystyrene, M-methoxystyrene, p-methoxystyrene, o-vinylbenzyl methyl ether, m-vinylbenzyl methyl ether, p-vinylbenzyl methyl ether, o-vinylbenzyl glycidyl ether, m-vinyl Benzyl glycidyl ether or p-vinyl benzyl glycidyl ether; alkyl (meth)acrylates, such as methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, Isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, second butyl (meth)acrylate or tertiary butyl (meth)acrylate; cycloaliphatic (Meth) acrylates, such as cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-methylcyclohexyl (meth)acrylate, tricyclic (meth)acrylate [5.2. 1.0.2.6] Decane-8-yl ester, 2-dicyclopentyloxyethyl (meth)acrylate, or isobornyl (meth)acrylate; (meth)acrylic acid Aryl esters, such as phenyl (meth)acrylate or benzyl (meth)acrylate; hydroxyalkyl (meth)acrylates, such as 2-hydroxyethyl (meth)acrylate or (meth)acrylic acid- 2-hydroxypropyl ester; N-substituted maleimide compounds, such as N-cyclohexylmaleimide, N-benzylmaleimide, N-phenylmaleimide, N-ortho Hydroxyphenylmaleimide, N-m-hydroxyphenylmaleimide, N-p-hydroxyphenylmaleimide, N-o-methylphenylmaleimide, N-methane Phenylmaleimide, N-p-methylphenylmaleimide, N-o-methoxyphenylmaleimide, N-m-methoxyphenylmaleimide, Or N-p-methoxyphenyl maleimide; unsaturated amide compound, such as (meth)acrylamide or N,N'-dimethyl (meth)acrylamide; or unsaturated oxygen Cyclobutane compounds, such as 3-methacryloxymethyloxycyclobutane, 3-methacryloxymethyl-3-ethyloxycyclobutane, 3-methacryloxymethyl 2-trifluoromethyl oxetane, 3-methacryloyloxymethyl-2-phenyl oxetane, 2-methacryloyloxymethyl oxetane, or 2 -Methacryloxymethyl-4-trifluoromethyloxetane.

Based on 100% by weight of the total solid content in the yellow curable resin composition, the content of the alkali-soluble resin may be 2% to 80% by weight, preferably 5% to 75% by weight, and more preferably 10 Weight% to 70% by weight. When the content of the alkali-soluble resin is within the range provided above, a yellow coating can be easily formed, and during the development process, the non-pixel area can be satisfactorily removed because the exposed part of the painting during development is prevented The film in the plain layer is reduced.

Photopolymerizable compound

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

The photopolymerizable compound is not limited to a specific type, as long as it is a compound that can be polymerized under the action of a photopolymerizable initiator described later, but is preferably a monofunctional photopolymerizable compound, a double Functional photopolymerizable compounds, at least trifunctional polyfunctional photopolymerizable compounds, and the like.

Specific examples of the monofunctional photopolymerizable compound include nonyl phenyl carbitol acrylate, 2-hydroxy-3-phenoxy propyl acrylate, 2-ethylhexyl carbitol acrylate, 2- Hydroxyethyl, N-vinylpyrrolidone, and commercially available products such as ARONIX M-101 (Toagosei Co., Ltd.), KAYARAD TC-110S (Nippon Kayaku Co., Ltd.) ., Ltd.)) and Viscoat 158 (Osaka Yuki Chemical Co., Ltd.), etc.

Specific examples of the bifunctional photopolymerizable compound include 1,6-hexanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, tri Ethylene glycol di(meth)acrylate, bisphenol A bis(propylene oxyethyl) ether, 3-methylpentanediol di(meth)acrylate, and commercially available products such as ARONIX M-210, M -1100, M-1200 (Toagosei Co., Ltd.), KAYARAD HDDA (Nippon Kayaku Co., Ltd.), Viscoat 260 (Osaka Organic Chemical Co., Ltd.), AH-600, AT-600 and UA-306H (Kyoeisha Chemical Co., Ltd.) Club (Kyoeisha Chemical Co., Ltd.)).

Specific examples of at least trifunctional polyfunctional photopolymerizable compounds include trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane Hydroxymethylpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, ethoxylated dipentaerythritol hexa(meth) ) Acrylate, propoxylated dipentaerythritol hexa(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and commercially available products such as ARONIX M-309, TO-1382 (Toagosei Co., Ltd.), KAYARAD TMPTA , KAYARAD DPHA, and KAYARAD DPHA-40H (Nippon Kayaku Co., Ltd.).

Among the examples of the photopolymerizable compounds listed above, particularly preferred are at least trifunctional urethane (meth)acrylate and (meth)acrylate, because these compounds have excellent polymerizability and Can improve strength.

The photopolymerizable compound may be used alone or in a combination of two or more.

Based on 100% by weight of the total solid content in the yellow curable resin composition, the content of the photopolymerizable compound may be 5 to 70% by weight, preferably 10 to 60% by weight, and more preferably 15% to 50% by weight. When the content of the photopolymerizable compound is within the range provided above, a pixel region with satisfactory strength and smoothness can be produced.

Photopolymerizable initiator

According to an embodiment of the present invention, the yellow curable resin composition may further include a photopolymerizable initiator.

The photopolymerizable initiator is not limited to a specific type as long as it can polymerize the photopolymerizable compound. Specifically, in consideration of polymerization characteristics, initial efficiency, absorbable wavelength, availability, price, etc., the photopolymerizable initiator is preferably one or more compounds selected from the following groups: acetophenone compounds, Benzophenone compounds, triazine compounds, biimidazole compounds, oxime compounds, and thioxanthone compounds.

Specific examples of acetophenone compounds include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethyl ketal, 2-hydroxy-1-[ 4-(2-hydroxyethoxy)phenyl)-2-methylpropan-1-one, 1-hydroxycyclohexylphenyl ketone, 2-methyl-1-(4-methylthiophenyl)- 2-Morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinylphenyl)butan-1-one, 2-hydroxy-2-methyl- 1-[4-(1-methylvinyl)phenyl]propan-1-one, and 2-(4-methylbenzyl)-2-(dimethylamino)-1-(4-? (Alolinylphenyl)butan-1-one.

Examples of benzophenone compounds include benzophenone, methyl phthalate, 4-phenylbenzophenone, 4-benzophenone-4'-methyl diphenyl sulfide, 3,3',4,4'-tetra(tert-butylperoxycarbonyl)benzophenone, and 2,4,6-trimethylbenzophenone.

Specific examples of triazine compounds 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)vinyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(furan-2-yl)vinyl ]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino-2-methylphenyl)vinyl]-1, 3,5-triazine, and 2,4-bis(trichloromethyl)-6-[2-(3,4-dimethoxyphenyl)vinyl]-1,3,5-triazine.

Specific examples of biimidazole compounds 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(alkoxybenzene) Yl)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, and the phenyl groups at the 4, 4', 5 and 5'positions are substituted by alkoxycarbonyl Imidazole compounds. Among the biimidazole compounds listed above, 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.

Specific examples of oxime compounds include o-ethoxycarbonyl-α-oxyimino-1-phenylpropan-1-one and commercially available products such as Irgacure® Oxe01 and Oxe02 (BASF SE).

Examples of thioxanthone compounds include 2-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, and 1-chloro-4-propoxythioxanthone .

In addition, photopolymerizable initiators and the like other than the photopolymerizable initiators listed above may be included in an amount that does not hinder the desired effect of the present invention. Examples of such substances include benzoin compounds and anthracene compounds, and these compounds may be used alone or in combination of two or more.

Examples of benzoin compounds include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether.

Examples of anthracene compounds include 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, and 2-ethyl-9,10- Diethoxyanthracene.

Examples of other substances that can be further included as a photopolymerizable initiator include 2,4,6-trimethylbenzyl diphenyl phosphine oxide, 10-butyl-2-chloroacridone, 2-ethylanthraquinone, benzyl-9,10-phenanthrenequinone, camphorquinone, methyl phenylglyoxylate, and titanocene compounds.

Based on 100% by weight of the total solid content in the yellow curable resin composition, the content of the photopolymerizable initiator may be 0.1% to 40% by weight, preferably 0.5% to 35% by weight, and more It is preferably 1% by weight to 30% by weight. When the content of the photopolymerizable initiator is within the range provided as described above, the yellow curable resin composition obtains higher sensitivity, thereby shortening the exposure time and improving productivity, and maintaining high resolution. Furthermore, the composition of the above-mentioned form forms a pixel layer having satisfactory strength and surface smoothness.

In addition, a photopolymerizable starting aid can be further included to improve sensitivity and productivity.

One or more compounds selected from the group consisting of amine compounds, carboxylic acid compounds, and organosulfur compounds having a thiol group are exemplary compounds that are preferably used as photopolymerizable initiating aids.

The amine compound is preferably an aromatic amine compound, and specifically may be an aliphatic amine compound, such as triethanolamine, methyldiethanolamine, and triisopropanolamine; methyl 4-dimethylaminobenzoate; 4 -Ethyl dimethylaminobenzoate; isoamyl 4-(dimethylamino)benzoate; 2-ethylhexyl-4-dimethylaminobenzoate; 2-dimethyl benzoate N,N-dimethyl-p-toluidine; 4,4'-bis(dimethylamino)benzophenone (also known as Michler's ketone); 4, 4'-bis(diethylamino)benzophenone; etc.

The carboxylic acid compound is preferably an aromatic heteroacetic acid and specifically may be phenylthioacetic acid, methylphenylthioacetic acid, ethylphenylthioacetic acid, methylethylphenylthio Acetic acid, dimethylphenylthioacetic acid, methoxyphenylthioacetic acid, dimethoxyphenylthioacetic acid, chlorophenylthioacetic acid, dichlorophenylthioacetic acid, N-phenylglycol Amino acid, phenoxyacetic acid, naphthylthioacetic acid, N-naphthylglycine, naphthyloxyacetic acid, etc.

Specific examples of organic sulfur compounds having a thiol group include 2-mercaptobenzothiazole, 1,4-bis(3-mercaptobutoxy)butane, 1,3,5-tris(3-mercaptobutoxy) Ethyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, trimethylolpropane tris(3-mercaptopropionate), pentaerythritol tetra(3-mercapto) Butyrate), pentaerythritol tetra(3-mercaptopropionate), dipentaerythritol hexa(3-mercaptopropionate), and tetraethylene glycol bis(3-mercaptopropionate).

In addition, commercially available products such as Darocur® 1173, Irgacure® 184, Irgacure® 907, and Irgacure® 1700 (BASF Corporation) can also be used as photopolymerizable initiation aids. These products can be used alone or in combination of two or more.

Such photo-cationic polymerization initiators can be easily obtained as commercially available products, for example, commercially available products with the following trade names are known: KAYARAD PCI-220, KAYARAD PCI-620 (Nippon Kayaku Co., Ltd.) , UVI-6990 (Union Carbide), Adeka Optomer SP-150, Adeka Optomer SP-170 (ADEKA Corporation), CI-5102, CIT-1370, CIT-1682 , CIP-1866S, CIP-2048S, CIP-2064S (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( Maruwa Chemical Co., Ltd. (Midori Kagaku Co., Ltd.) and PI-2074 (Solvay SA).

In particular, CI-5102 produced by Japan Soda Co., Ltd. is one of the preferred starters.

The content range of the photopolymerizable initiator may be the same as the content range of the photopolymerizable initiator. When the content of the photopolymerizable starting assistant is within the above range, the yellow curable resin composition containing the photopolymerizable starting assistant obtains higher sensitivity, and the composition is used in the manufacture of color filters When filming, a color filter with improved productivity can be manufactured.

Solvent

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

The solvent is not limited to a specific type, but may be an organic solvent conventionally used in this technology. The solvent may be any solvent used for the conventional yellow curable resin composition without particular limitation, as long as it can effectively dissolve other components. Specifically, any one of ethers, aromatic hydrocarbons, ketones, alcohols, esters, and amides may be included as a part of the solvent. More specific examples of the solvent include ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, and ethylene glycol monobutyl ether; diethylene glycol dialkyl ether Ethers, such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, and diethylene glycol dibutyl ether; glycol alkyl ether acetate, such as acetic acid-2- Methyl cellosolve acetate and ethyl cellosolve acetate; propylene glycol dialkyl ethers, such as propylene glycol monomethyl ether; alkyl 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 glycerol; esters, such as ethyl 3-ethoxypropionate and methyl 3-methoxypropionate; cyclic esters, such as γ-butyrolactone. These substances can be used alone or in combination of two or more.

Since the viscosity of the solvent can be changed depending on the coating method or equipment, the amount of the solvent is appropriately adjusted so that the content of the solvent in the yellow curable resin composition is 5% to 90% by weight, and preferably 15% by weight % To 80% by weight. This content range is selected according to the dispersion stability of the composition and the ease of processing (such as applicability) in the production process.

Additives

According to an embodiment of the present invention, the yellow curable resin composition may include additives such as fillers, other polymer compounds, and surface active agents in an amount that does not interfere with the purpose of the present invention according to the needs of those skilled in the art. Agents, adhesion promoters, antioxidants, ultraviolet absorbers, retarders, or curing agents.

Specific examples of fillers include glass, silica and alumina.

Specific examples of other polymer compounds include curable resins such as epoxy resins and maleimide resins; and thermoplastic resins such as polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether, acrylic polyfluoroalkyl Ester, polyester, and polyurethane.

The surfactant is a component used to improve the film-forming ability of the yellow curable resin composition. Examples of surfactants include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyethylene glycol diester, sorbitan fatty acid ester, fatty acid modified polyester, three Metaamine-modified polyurethane, polyethyleneimine, and commercially available products such as KP series (Shin-Etsu Chemical Co., Ltd.), POLYFLOW series (Kyoeisha Chemical Co., Ltd.) ), EFTOP series (Tochem Products Co., Ltd.), MEGAFACE series (DIC Corporation (DIC Corporation)), Flourad ^TM series (Sumitomo 3M Limited), AsahiGuard series and SURFLON series (Asahi Glass Co., Ltd.) Co., Ltd.)), Solsperse ^TM series (Lubrizol Corporation), Efka® series (BASF Corporation), and AJISPER PB821 (Ajinomoto Fine Chemical Co., Ltd.).

Examples of adhesion promoters include vinyl trimethoxy silane, vinyl triethoxy silane, vinyl tris (2-methoxyethoxy) silane, N-(2-aminoethyl)-3-amine Propylmethyldimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxysilane Propyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropylmethyl Dimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, and 3-mercaptopropyltrimethoxysilane.

Specifically, the antioxidant may be 2,2'-thiobis(4-methyl-6-tert-butylphenol), 2,6-di-tert-butyl-4-methylphenol, and the like.

Specifically, the ultraviolet absorber may be 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5-chlorobenzotriazole, alkoxybenzophenone, and the like. Specifically, the retarder may be sodium polyacrylate or the like.

The curing agent is a component for achieving deep curing and improving mechanical strength and is not limited to a specific type. Examples of curing agents include epoxy compounds, polyfunctional isocyanate compounds, melamine compounds, and oxetane compounds.

The epoxy compound is not limited to a specific type, and is, for example, bisphenol A type epoxy resin, hydrogenated bisphenol A type epoxy resin, bisphenol F type epoxy resin, hydrogenated bisphenol F type epoxy resin, and novolac type epoxy resin. Resins, other aromatic epoxy resins, cycloaliphatic epoxy resins, glycidyl ester resins, glycidylamine resins, or brominated derivatives of these epoxy resins; aliphatic resins other than those listed above , Alicyclic or aromatic epoxy compounds and brominated derivatives of these epoxy resins; epoxidized butadiene (co)polymer; epoxidized isoprene (co)polymer; (meth)acrylic acid Glycidyl ester (co)polymer; triglycidyl isocyanurate; etc.

The oxetane compound is not limited to a specific type, and is, for example, carbonate dioxetane, xylene dioxetane, adipate dioxetane, and terephthalate dioxane. Butane, cyclohexane dicarboxylic acid dioxane, etc.

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. In the present invention, the curing aid that can be used is not limited to a specific type, but may be any curing aid known in the art.

Representative examples of curing aids include triamines such as benzyldimethylamine, triethanolamine, triethylenediamine, dimethylaminoethanol, and tris(dimethylaminomethyl)phenol; imidazole, For example, 2-methylimidazole and 2-phenylimidazole; organic phosphines, such as triphenylphosphine, diphenylphosphine, and phenylphosphine; and tetraphenylborate, such as tetraphenylphosphonium tetraphenylborate and Triphenylphosphine tetraphenylborate.

In the present invention, the preparation of the above-mentioned yellow curable composition is not limited to a specific method, but can be carried out according to a conventional preparation method of a curable composition.

For example, the yellow colorant is mixed with the solvent in advance and dispersed in the solvent using a bead mill or the like until the average particle size of the colorant reaches about 0.2 microns or less. In this case, a pigment dispersant may be used, and some or all of the alkali-soluble resin may be mixed into the composition as needed. To the obtained dispersion (hereinafter referred to as the grinding base), a wavelength absorbing material, the remaining alkali-soluble resin, a photopolymerizable compound, a photopolymerizable initiator, and optional materials can be further added at a predetermined concentration. Another component and an additional solvent may be used as needed to obtain the desired yellow curable resin composition.

The yellow curable resin composition prepared in this way can be used to manufacture color filters by wet coating. For this, coating devices such as roll coaters, spin coaters, slit and spin coaters, and slits can be used. Slot coater (sometimes called die coater), and inkjet.

<Color filter>

Another aspect of the present invention provides a color filter including a cured product of the yellow curable resin composition.

The pixel layer of the color filter is a self-luminous pixel layer that includes quantum dots, and in order to absorb the blue emission spectrum, it is in contact with the self-luminous pixel layer instead of yellow colorant and quantum dots included in the self-luminous The method in the pixel layer forms a separate yellow colorant layer. That is, the light emitted by the quantum dots generates a specific wavelength, and when the yellow colorant will be included in the self-luminous pixel layer, the self-emitted red, blue, and green light will not be emitted to the outside of the pixel layer. In addition, since the yellow colorant is intended to remove blue light from the red and green light that has been emitted, it should be arranged in such a way that the self-luminous pixel layer is located between the light source and the yellow colorant. If the yellow colorant is placed between the light source and the self-luminous pixel layer, the desired effect may not be achieved.

Fig. 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 for explaining the position of the color filter relative to the light source in the present invention.

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

In this case, the yellow coating layer 13 is manufactured using the above-mentioned yellow curable resin composition. As shown in FIG. 2, the yellow coating layer 13 is preferably formed only on the red pixel layer 15A and the green pixel layer 15B defined by partitions 51A, 51B, and 51C, and is disposed opposite to the light source 101.

The yellow coating 13 causes only green to be displayed at the green pixel layer 15B where green and blue are mixed, and only red to be displayed at the red pixel layer 15A where red and blue are mixed. As a result, pure green light and pure red light can be extracted, thereby improving overall color purity and enhancing luminous efficacy.

The above effect is mainly affected by the content of the yellow colorant in the yellow coating 13 and is also slightly affected by the thickness of the yellow coating 13. For example, the yellow coating layer 13 is formed to have a thickness of 1 μm to 5 μm. When the thickness is lower than the range provided above, the above effect may not be achieved, and the thickness exceeding the range provided above will not produce significant benefits.

In the color filter according to the present invention, the substrate may refer to, but is not particularly limited to, the substrate of the color filter itself or the part where the color filter is provided in the display device, and the like. The substrate may be a substrate made of glass, silicon (Si), silicon oxide (SiO _x ), or polymer. The polymer used for the polymer substrate may be polyethersulfone (PES), polycarbonate (PC), and the like.

The self-luminous pixel layer 15 as a layer including quantum dots is manufactured based on a self-luminous photosensitive resin composition including one or more selected from the following group: photoluminescence Quantum dots, alkali-soluble resins, photopolymerizable compounds, photopolymerizable initiators, and solvents. In this case, the types and contents of the alkali-soluble resin, the photopolymerizable compound, the photopolymerizable initiator, and the solvent can follow the description of the yellow curable resin composition provided above.

Quantum dots are nano-sized semiconductor materials. Atoms form molecules and molecules form nano-particles by forming aggregates of small molecules called clusters, and when such nano-particles have semiconductor properties, they are called quantum dots. When a quantum dot receives external energy and reaches an excited state, it emits energy according to its corresponding energy band gap.

By including these photoluminescence quantum dot particles, the color filter can emit light when irradiated by light ("photoluminescence").

The quantum dot is not limited to a specific type, as long as it can emit light when stimulated by light. For example, a substance selected from the following groups can be used as quantum dots: Group II-VI semiconductor compounds; Group III-V semiconductor compounds; Group IV-VI semiconductor compounds; Group IV elements or compounds containing them; and combinations thereof . Such substances can be used alone or in combination of two or more.

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

In addition, the quantum dot may have a single homogeneous structure; a dual structure, such as a core-shell structure or a gradient structure; or a mixed structure thereof.

In the core-shell dual structure, the core and the shell may be composed of semiconductor compounds that are different from each other among the semiconductor compounds listed above. For example, the core may include one or more substances selected from the following group: CdSe, CdS, ZnS, ZnSe, CdTe, CdSeTe, CdZnS, PbSe, AgInZnS, and ZnO, but the present invention is not limited thereto. The shell may include one or more substances selected from the following group: CdSe, ZnSe, ZnS, ZnTe, CdTe, PbS, TiO, SrSe, and HgSe, but the present invention is not limited thereto.

The colored photosensitive resin composition used in the manufacture of conventional color filters includes red colorants, green colorants, and blue colorants for color implementation, and the color filter according to the present invention may include those selected from the following One or more substances of the group: red-emitting quantum dots, green-emitting quantum dots, and blue-emitting quantum dots.

Quantum dots can be synthesized by a wet chemical process, a metalorganic chemical vapor deposition (MOCVD) process, or a molecular beam epitaxy (MBE) process.

The wet chemical process is a method of growing particles by adding precursor materials to an organic solvent. When the crystal grows, the organic solvent acts as a dispersant, naturally coordinates on the surface of the quantum dot crystal and controls the crystal growth, and can be compared with vapor deposition (such as metal organic chemical vapor deposition or molecular beam epitaxy) Easier and cheaper process to control the growth of nanoparticles.

Based on 100% by weight of the entire composition, the self-luminous photosensitive resin composition including these quantum dots may include 3% to 80% by weight of quantum dots, 5% to 80% by weight of alkali-soluble resin, 5 Weight% to 70% by weight of the photopolymerizable compound, and 0.1% to 20% by weight of the photopolymerizable initiator. In addition, the composition may further contain the above-mentioned additives.

The color filter can be manufactured by the following exemplary method, but the present invention is not limited to this, and the sequence of the steps described below can be changed according to the designer's needs (see Fig. 1 and Fig. 2).

S1) forming a yellow coating 13 on the substrate 11; S2) forming partition walls 51A, 51B, and 51C on the yellow coating 13 for defining the area of the red pixel layer 15A and the area of the green pixel layer 15B; and S3 ) A self-luminous pixel layer 15 is formed in the above-mentioned pixel region.

The partition walls 51A, 51B, and 51C, the self-luminous pixel layer 15 and the yellow coating 13 can be formed as follows: applying their respective compositions, exposing the compositions according to a predetermined pattern, and developing and curing the compositions.

The color filter may further include a black matrix if necessary.

<Image display device>

Another aspect of the present invention provides an image display device including a color filter.

Color filters can be used in various image display devices, such as electroluminescence display devices, plasma display devices, field emission display devices, and typical liquid crystal display devices.

The image display device may be provided with 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. When the image display device includes the above-mentioned color filter, in order to achieve better color reproducibility, the light source is preferably a light source that emits blue light, but the present invention is not limited to this.

According to another embodiment of the present invention, the image display device according to the present invention may be provided with a color filter including only two selected from the red pattern layer, the green pattern layer, and the blue pattern layer. In this case, the color filter further includes a transparent pattern layer without quantum dot particles.

When only two types of pattern layers are included, a light source that emits light of a wavelength corresponding to the excluded color may be used. For example, when the color filter includes a red pattern layer and a green pattern layer, a light source that emits blue light can be used. In this case, the red quantum dot particles emit red light, the green quantum dot particles emit green light, and the transparent pattern layer shows blue due to the direct passage of blue light.

The image display device has excellent luminous efficacy, and therefore exhibits high brightness and excellent color reproducibility.

Hereinafter, the present invention will be described in detail through exemplary embodiments. However, the implementation aspects of this specification can be modified in various other forms, and the scope of this specification should not be construed as being limited to the implementation aspects provided below. The implementation aspect of this specification is provided for a more thorough and complete description of this specification to those who are familiar with this technology. In addition, unless otherwise specified, terms describing the content of substances (such as "%" and "parts") are based on weight.

Manufacturing example 1 to manufacturing example 4

Manufacturing example 1: Synthesis of photoluminescent green quantum dot particles with CdSe/ZnS core-shell structure

Put 0.4 millimoles of CdO, 4 millimoles of zinc acetate, 5.5 milliliters of oleic acid, and 20 milliliters of 1-octadecene into the reactor, and react by heating to 150°C. Then, in order to remove acetic acid produced by replacing zinc with oleic acid, the reaction product was kept under a vacuum of 100 millitorr (mTorr) for 20 minutes.

Next, the material was heated to 310°C to form a transparent mixture, and kept at 310°C for 20 minutes, and the mixture was dissolved by dissolving 0.4 millimoles of selenium powder and 2.3 millimoles of sulfur powder in 3 ml of trioctyl phosphine The prepared selenium and sulfur solution is quickly 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 until the growth stopped using an ice bath.

Then, ethanol was added to the mixture to cause precipitation, the quantum dots were separated using a centrifuge, and the remaining impurities were washed with chloroform and ethanol. In this way, green quantum dot particles that are stabilized with oleic acid and each have a CdSe (core)/ZnS (shell) structure and have a total diameter of 3 nm to 5 nm including the core and the shell are obtained.

Production Example 2: Synthesis of alkali-soluble resin

Prepare a flask equipped with a stirrer, thermometer, reflux condenser, dropping funnel and nitrogen injection tube. Combine 45 parts by weight of N-benzylmaleimide, 45 parts by weight of methacrylic acid, 10 parts by weight of tricyclodecyl methacrylate, 4 parts by weight of tert-butyl peroxy-2-ethylhexanoate, and 40 parts by weight of propylene glycol monomethyl ether acetate are mixed and stirred to equip a dropping funnel for monomers. In addition, 6 parts by weight of n-dodecanediol and 24 parts by weight of propylene glycol monomethyl ether acetate were mixed and stirred to equip the dropping funnel of the chain transfer agent.

Then, 395 parts by weight of propylene glycol monomethyl ether acetate was introduced into the flask, the air atmosphere in the flask was replaced with a nitrogen atmosphere, and then the temperature of the flask was increased to 90°C while stirring.

Subsequently, the monomer and chain transfer agent were dropped into the flask from their respective dropping funnels. Drop it for 2 hours while maintaining the temperature of the substance at 90°C. After 1 hour, the temperature was increased to 110°C and kept at 110°C for 3 hours. Then, the gas injection pipe is introduced to initiate bubbling of the mixed gas of oxygen/nitrogen=5/95 (volume/volume).

Subsequently, 10 parts by weight of glycidyl methacrylate, 0.4 parts by weight of 2,2'-methylene-bis(4-methyl-6-tert-butylphenol) and 0.8 parts by weight of triethylamine were added to the flask In, the reaction was carried out at 110°C for 8 hours, and then cooled to room temperature to obtain an 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 mg KOH/g.

Manufacturing Example 3: Preparation of a self-luminous photosensitive resin composition for manufacturing a self-luminous pixel layer

The ingredients were mixed as described in Table 1 below, and the mixture was diluted with propylene glycol monomethyl ether acetate to obtain a total solids content of 20% by weight. Then, these substances are sufficiently stirred to obtain a self-luminous photosensitive resin composition.

Example 1 to Example 6 and Comparative Example 1 and Comparative Example 2

The ingredients were mixed as described in Table 2 below, and the mixture was diluted with propylene glycol monomethyl ether acetate to obtain a total solids content of 20% by weight. Then, these materials are sufficiently stirred to obtain a yellow curable resin composition.

Experimental example 1: Transmission characteristic test of yellow curable resin composition

The transmission characteristics of the yellow curable resin composition prepared according to Examples 1 to 6 and Comparative Example 1 and Comparative Example 2 were measured as follows.

First, each yellow curable resin composition was coated on a glass substrate by a spin coating method, and the coated substrate was placed on a hot plate at a temperature of 100° C. for three minutes to form a thin film.

Subsequently, using an ultra-high pressure mercury lamp (USH-250D) manufactured by Ushio Inc. in an air atmosphere with an exposure amount (365 nm) of ^{200 millijoules/cm² (mJ/cm 2)} Light irradiation, but without any specific filter. Then, it was heated in a heating oven at 150°C for 10 minutes to form a yellow coating with a thickness of 2 microns.

The transmittance of the yellow coating was measured using the OSP-SP2000 colorimetric meter manufactured by Olympus Corporation, and the results are listed in Table 3 provided below.

As shown in Table 3, the yellow coatings of Examples 1 to 6 manufactured by containing the wavelength absorbing material of the present invention and using the yellow curable resin composition of the present invention are composed of the yellow curable resin not using the yellow curable resin composition of the present invention. Compared with the yellow coatings of Comparative Example 1 and Comparative Example 2 manufactured by using materials, the wavelength absorption is high, and therefore the transmittance is low.

Manufacturing example 4: Manufacturing of color filters

Manufacturing example 4-1 to manufacturing example 4-6, manufacturing example 4-13, and manufacturing example 4-14

(1) Form yellow coating

First, the yellow curable resin compositions prepared according to Examples 1 to 6 and Comparative Example 2 and Comparative Example 2 were respectively coated on a 100 mm×100 mm glass substrate (EAGLE XG® Slim glass; Corning Inc.), and place the coated substrate on a hot plate at a temperature of 100°C for three minutes to form a thin film.

Subsequently, the ultra-high pressure mercury lamp (USH-250D) manufactured by Nihon Ushio Co., Ltd. was used to irradiate light with an exposure of 200 mJ/cm² (365 nm) in an air atmosphere, but without any specific filter. .

The film irradiated with ultraviolet rays as described above was immersed in a KOH developing aqueous solution of pH 10.5 for 80 seconds for development. The thin-film-coated glass substrate was washed with distilled water, dried by blowing nitrogen gas, and heated in a heating furnace at 150° C. for 10 minutes to produce a yellow curable resin layer with a thickness of 2 microns.

(2) Form a self-luminous pixel layer

A 5 micron thick self-luminous pixel layer was formed on each of the yellow coating layers described in part (1) to manufacture the manufacturing examples 4-1 to 4-6, manufacturing example 4-13, and manufacturing example 4-14. Color filters. In this case, using the self-luminous photosensitive resin composition of Production Example 3-1, a self-luminous pixel layer was formed in the same manner as the method described in section (1).

Manufacturing example 4-7 to manufacturing example 4-12, manufacturing example 4-15, and manufacturing example 4-16

In addition to using the self-luminous photosensitive resin composition of Manufacturing Example 3-2 to form a self-luminous pixel layer, it was used and used in Manufacturing Example 4-1 to Manufacturing Example 4-6, Manufacturing Example 4-13, and Manufacturing Example 4 -14 color filters to manufacture the color filters of Manufacturing Example 4-7 to Manufacturing Example 4-12, Manufacturing Example 4-15, and Manufacturing Example 4-16.

Experimental example 2: Measuring the luminous intensity of the color filter

The luminous intensity of the color filter manufactured according to Manufacturing Example 4 was measured as follows.

Use XLamp® XR-E Royal Blue with a maximum absorbable wavelength of 450nm from Cree, Inc. as the blue light emitting source to identify the area corresponding to the wavelength generated by light conversion. The blue light emitting source is set As opposed to the yellow coating. Measure manufacturing example 4-1 to manufacturing example 4-6, manufacturing example 4-13, and manufacturing example 4-14 at 450 nm (the region corresponding to the wavelength of the light source) and 520 nm (corresponding to the Wavelength region), and measure the luminous intensity at 450nm (the region corresponding to the wavelength of the light source) and 640 for Manufacturing Example 4-7 to Manufacturing Example 4-12, Manufacturing Example 4-15, and Manufacturing Example 4-16 The luminous intensity at nanometers (corresponding to the wavelength region generated by light conversion). In this case, a spectrometer from Ocean Optics, Inc. was used to measure the luminous intensity.

The results are shown in Table 4 provided below. As a result, the intensity is low at 450 nm (the region corresponding to the wavelength of the light source) and the intensity is higher at 520 nm or 640 nm (the region corresponding to the wavelength of the emitted light), indicating that the color purity is excellent and the light is emitted Excellent characteristics.

As shown in Table 4, the color filters of Manufacturing Example 4-1 to Manufacturing Example 4-12 including the yellow coating layer of one of Examples 1 to 6 containing the wavelength absorbing material of the present invention are at 450 nanometers. It has a luminous intensity of 50 or less at the area corresponding to the wavelength of the blue light emitting light source and exhibits excellent shading characteristics, and because it has 40,000 or more at 520 nm (the area corresponding to the wavelength of the green light emission) High luminous intensity or 35000 or higher luminous intensity at 640 nm (the region corresponding to the red light emission wavelength) exhibits excellent luminous characteristics.

In contrast, the color filters of Manufacturing Examples 4-13 to 4-16 including the yellow coating of Comparative Example 1 or Comparative Example 2 that do not contain the wavelength absorbing material of the present invention are due to the fact that the color filters are at 450 nanometers ( The region corresponding to the wavelength of the blue light emitting source) has a luminous intensity of 80 or higher and exhibits poor shading characteristics, and because it is at 520 nm and 640 nm (corresponding to the green light emission wavelength and the red light emission wavelength, respectively) The region) has a luminous intensity of 30,000 or less and exhibits particularly poor luminous characteristics.

11‧‧‧Substrate

13‧‧‧Yellow coating

15A‧‧‧Red pixel layer

15B‧‧‧Green pixel layer

51A, 51B, 51C‧‧‧Partition wall

101‧‧‧Light source

Claims (8)

A yellow curable resin composition comprising: a yellow colorant; and a wavelength absorbing material, the wavelength absorbing material has a maximum absorbable wavelength of 560 nm to 620 nm and satisfies the transmission described in Mathematical Expression 1 provided below characteristic:

T(λ-20nm)

60%; and T(λ+20nm)

60%, where in the mathematical expression 1, T is the transmittance (%) and λ is the wavelength between 560 nm and 620 nm, where the wavelength absorbing material includes the compound represented by the structural formula 1 provided as follows:

Wherein in structural formula 1, M is copper or zinc; X _{1 is} each independently a halogen element selected from fluorine, chlorine and bromine; n is each independently an integer from 0 to 5; and R ₁ to R ₄ are each independently It is selected from the group consisting of methyl, ethyl, propyl, isopropyl and tertiary butyl. The yellow curable resin composition according to claim 1, further comprising one or more selected from the following groups: alkali-soluble resin, photopolymerizable compound, photopolymerizable initiator, solvent, and additive. The yellow curable resin composition according to claim 1, wherein the content of the yellow colorant is 5 wt% to 80 wt% based on 100 wt% of the total solid content in the yellow curable resin composition. The yellow curable resin composition according to claim 1, wherein the content of the wavelength absorbing material is 1% to 30% by weight based on 100% by weight of the total solid content in the yellow curable resin composition. A color filter comprising a yellow coating comprising a cured product of the yellow curable resin composition according to any one of claims 1 to 4; and a self-luminous pixel layer, the self-luminous painting The plain layer is formed on the yellow coating and includes quantum dots. The color filter according to claim 5, wherein the yellow coating is formed on the red pixel layer and the green pixel layer. An image display device comprising the color filter according to claim 5. The image display device according to claim 7, wherein the yellow coating included in the color filter is arranged opposite to the light source.

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