TW201823385A - 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 capable of producing, by including a yellow colorant and a metal oxide, a color filter and an image display device that exhibit improved color reproducibility and enhanced luminance. The present invention also 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 therewith  

The present invention relates to a yellow curable resin composition having improved color reproducibility and enhanced brightness, and a color filter and image display device comprising the composition.

The color filter is a film type optical component capable of extracting three colors of red (R), green (G), and blue (B) from white light and forming them into fine pixels.

Such a color filter has a structure in which a transparent substrate, a black matrix layer, and a pixel region are sequentially stacked, the black matrix layer being formed on the transparent substrate in a predetermined pattern to shield a boundary between pixels Protected from illumination, the pixel regions are comprised of two or more of the three primary colors (typically red, green, and blue) that are arranged in a predetermined order to form each pixel.

In general, a color filter can be produced 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, and in recent years, a pigment-dispersed photosensitive resin is most often used. Pigment dispersion method.

The pigment dispersion method in the above listed methods is a method of forming a colored film by repeating a series of processes including coloring agents, alkali-soluble resins, photopolymerizable monomers, photopolymerizable A photosensitive resin composition of an initiator, an epoxy resin, a solvent, and one or more other additives is applied onto a transparent substrate provided with a black matrix, the pattern to be formed is exposed, and the unexposed portion is removed with a solvent and thermally cured. And the pigment dispersion method is actively applied to manufacture of a liquid crystal display (LCD) for use in mobile phones, notebook computers, monitors, televisions, and the like.

In recent years, photosensitive resin compositions used in various advantageous pigment dispersion methods for producing color filters are required to have excellent patterning properties, and further improvement characteristics such as high color reproducibility are required. High brightness, high contrast, etc.

However, it is fundamentally limited in that during the color reproduction of light emitted from the light source through the color filter for color development, a part of the light is absorbed by the color filter during transmission, 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 such problems, a color filter based on a quantum dot photosensitive resin composition has been proposed.

Korean Laid-Open Patent Application No. 2013-0000506 discloses a display device which exhibits an improvement by including a plurality of wavelength-converting particles (quantum dots or phosphors) and a plurality of color filter particles (pigments or dyes). Color reproducibility and enhanced brightness, but such display devices do not have sufficiently high brightness.

[Previous Technical Literature]

[Patent Literature]

(Patent Document 1): Korean Open Patent Application No. 2013-0000506 (January 3, 2013)

The present invention has been devised in order to solve the above problems, and an object thereof is to provide a yellow curable resin composition for producing a color filter and an image display device with improved color reproducibility and enhanced brightness.

Further, the present invention is directed to a color filter and an image display device which exhibit improved color reproducibility and enhancement by containing a cured product of the yellow curable resin composition. Brightness.

In order to achieve the above object, the yellow curable resin composition according to the present invention contains a yellow colorant and a metal oxide.

Further, the color filter according to the present invention comprises: a yellow coating layer comprising a cured product of the yellow curable resin composition; and a self-luminous pixel layer formed on the yellow coating layer And includes quantum dots.

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

An advantage of the yellow curable resin composition according to the present invention is that it can be used for producing color filters and image display devices which exhibit excellent color reproducibility and excellent brightness.

Further, the color filter and the image display device comprising the cured product of the yellow curable resin composition according to the present invention are advantageous in that they exhibit excellent color reproducibility and excellent brightness.

11‧‧‧Substrate

13‧‧‧ yellow coating

15‧‧‧Self-emitting 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.

Figure 2 is a cross-sectional view for explaining the position of a color filter with respect to a light source in accordance with 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 case where the two members are in contact with each other, but also covers the presence of a third member between the two members. The situation.

In describing the present invention, when referring to a component "containing," "including," "comprising," or "having" another component, it is 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 is advantageous in that it contains a yellow colorant and a metal oxide, and thus can improve color reproducibility and brightness of a color filter and an image display device. Both the light sheet and the image display device comprise a yellow coating comprising a cured product of the yellow curable resin composition.

Colorant

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

Unlike a color filter containing a pigment, a quantum dot-based color filter emits self-luminescence and includes a self-luminous pixel layer formed in a pixel region such that it emits spontaneous red light. , green and blue light. The self-luminous pixel layer has a self-luminous property that is capable of absorbing the irradiated light and then emitting 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 (nm) to 700 nm, and green occurs at 490 nm to 590 nm. Light emission, and blue light emission occurs at 400 nm to 480 nm, thereby achieving full color. In this case, the blue light source is used as a light source of the image display device equipped with the color filter, resulting in color mixing in the self-luminous pixel layer, such as in the presence of a blue emission spectrum of 400 nm to 480 nm. Seen in the emission spectrum of the red and green self-luminous pixel layers. This color mixing is especially noticeable in the red pixel layer and the green pixel layer.

In order to prevent the above problem, a yellow coating layer is provided on the red pixel layer and the green pixel layer, which is a cured product of a yellow curable resin composition containing 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, and thus the self is improved. Luminous color purity and luminous efficacy.

The yellow colorant is not limited to a particular type and may be selected from the yellow colorants provided below. In this case, a conventional yellow colorant or any of a pigment, a dye, and a dye can be used as the yellow colorant. Specifically, the yellow colorant may be provided with Colour Index ^TM (CI; published by the British Association of dyeing and color cum (Society of Dyers and Colourists)) code colorant, colorant listed below. However, in order to reduce the environmental burden and to take into account the influence on the human body, the yellow colorant is preferably a halogen-free color former.

Monoazo pigments: pigment yellow 1, pigment yellow 2, pigment yellow 5, pigment yellow 8, pigment yellow 105, pigment yellow 120, pigment yellow 150, pigment yellow 168, pigment yellow 182, pigment yellow 183, pigment yellow 190; Oxazolin azo pigment: Pigment Yellow 10; Diazo pigment: Pigment Yellow 12, Pigment Yellow 16, Pigment Yellow 63, Pigment Yellow 83, Pigment Yellow 126, Pigment Yellow 127, Pigment Yellow 128, Pigment Yellow 152, Pigment Yellow 170 , Pigment Yellow 188; Azomethine pigment: Pigment Yellow 101, Pigment Yellow 129; Antimony Pigment: Pigment Yellow 108, Pigment Yellow 147, Pigment Yellow 193, Pigment Yellow 197, Pigment Yellow 199, Pigment Yellow 202; Linone pigment: pigment yellow 109, pigment yellow 110, pigment yellow 139, pigment yellow 173, pigment yellow 185; quinoline pigment: pigment yellow 115; quinophthalone pigment: pigment yellow 138, pigment yellow 231; polycyclic pigment: pigment Yellow 148; Diterpene pigment: Pigment Yellow 153; Benzimidazolone pigment: Pigment Yellow 154, Pigment Yellow 175, Pigment Yellow 180, Pigment Yellow 181; Heterocyclic Pigment: Pigment Yellow 192; Cyone Pigment (perinone): Pigment Yellow 196; inorganic pigments: pigment yellow 30, pigment yellow 31, pigment yellow 32, pigment yellow 119, color Yellow 157, Pigment Yellow 162, Pigment Yellow 184; Anthocyanin pigment: xanthene pigment; merocyanine pigment; dipyrrin pigment; arylmethine pigment; acridine pigment; coumarin Material; oxazine pigment; and tetrapyrrole pigment.

In some cases, the pigments listed above may be previously subjected to rosin treatment, previously subjected to surface treatment by using a pigment derivative in which an acidic group or a basic group is introduced, and previously subjected to surface bonding by using a polymer compound or the like. The branch treatment is carried out by using fine particle treatment using sulfuric acid in advance, washing treatment by using an organic solvent or water in advance, and the like.

According to an embodiment of the present invention, the yellow curable resin composition may specifically comprise one or more selected from the group consisting of CI Pigment Yellow 138, CI Pigment Yellow in the exemplary yellow colorants listed above. 185 and CI Pigment Yellow 231. C.I. Pigment Yellow 138, C.I. Pigment Yellow 185 and C.I. Pigment Yellow 231 are capable of satisfying the spectral wavelengths and spectral characteristics described below, and thus it is preferred to use such yellow colorants.

Specifically, the yellow colorant preferably has light capable of absorbing a low wavelength region (about 330 nm to 550 nm) in a visible light wavelength region of 380 nm to 780 nm and transmits or reflects light of other wavelength regions. Spectral characteristics. Therefore, a yellow colorant satisfying a specific range of transmittance in a transmission spectrum of 470 nm to 510 nm and having a transmittance within ±20 nm of the spectral range can be used.

Unlike the case of the red light-emitting layer, in the green light-emitting layer, the blue wavelength overlaps with the green wavelength in the region of 470 nm to 510 nm. In this region, the loss of green light emitted should be minimized, and the blue light source should be maximally occluded, and preferably produce a clear spectrum in the region of 470 nm to 510 nm (occlusion / Transmitted) to satisfy both such light transmission characteristics and light blocking characteristics.

Therefore, the yellow curable resin composition according to an embodiment of the present invention may contain a yellow colorant satisfying the transmission characteristics described in Mathematical Expression 1 below.

T(λ-20nm)<2%; and T(λ+20nm) 80%, wherein in Mathematical Expression 1, T is the transmittance (%), and λ is a wavelength selected from the range of 470 nm to 510 nm.

A yellow colorant having a spectral wavelength (λ) lower than the range provided in Mathematical Expression 1 above may not sufficiently prevent the influence of blue light. On the other hand, when λ exceeds the range provided above, it is also possible to display a yellow peak on the color filter, thereby reducing the transmittance of light emitted from the self-luminous layer and thereby reducing the color purity.

The yellow colorant may be included in an amount of from 5% by weight to 80% by weight based on the total solid content of 100% by weight of the entire yellow curable resin composition, and the amount of the yellow colorant is preferably from 10% by weight to 70% by weight. %, and more preferably from 20% by weight to 50% by weight. It is recommended to appropriately use the yellow colorant within the range provided above, because when the content of the yellow colorant is lower than the range, the effect of achieving color purity enhancement and luminous efficiency improvement due to occlusion of blue light cannot be expected. The use of a yellow colorant in an amount exceeding this range does not significantly increase such effects and is therefore uneconomical.

According to an embodiment of the present invention, in addition to the yellow colorant, the yellow curable resin composition may further comprise one or more selected from the group consisting of a red colorant and a green colorant.

The red colorant or green colorant is not limited to a particular type and is, for example, a pigment or a dye.

Specifically, the red pigment may be CI Pigment Red 177, CI Pigment Red 179, CI Pigment Red 202, CI Pigment Red 206, CI Pigment Red 207, CI Pigment Red 208, CI Pigment Red 209, CI Pigment Red 215, CI Pigment. Red 216, CI Pigment Red 220, CI Pigment Red 224, CI Pigment Red 226, CI Pigment Red 242, CI Pigment Red 243, CI Pigment Red 245, CI Pigment Red 254, CI Pigment Red 255, CI Pigment Red 264, CI Pigment Red 265, etc., and the green pigment can be CI Pigment Green 7, CI Pigment Green 10, CI Pigment Green 15, CI Pigment Green 25, CI Pigment Green 36, CI Pigment Green 47, CI Pigment Green 58, CI Pigment Green 59, CI Pigment Green 62, CI Pigment Green 63, etc., but the present invention is not limited thereto.

In addition, the red dye can be: CI Solvent Red 8, CI Solvent Red 45, CI Solvent Red 49, CI Solvent Red 89, CI Solvent Red 111, CI Solvent Red 122, CI Solvent Red 125, CI Solvent Red 130, CI Solvent Red. 132, CI solvent red 146, CI solvent red 179; CI acid red 1, CI acid red 4, CI acid red 8, CI acid red 14, CI acid red 17, CI acid red 18, CI acid red 26, CI acid red 27, CI acid red 29, CI acid red 31, CI acid red 34, CI acid red 35, CI acid red 37, CI acid red 42, CI acid red 44, CI acid red 50, CI acid red 51, CI acid red 52, CI acid red 57, CI acid red 66, CI acid red 73, CI acid red 80, CI acid red 87, CI acid red 88, CI acid red 91, CI acid red 92, CI acid red 94, CI acid red 97, CI acid red 103, CI acid red 111, CI acid red 114, CI acid red 129, CI acid red 133, CI acid red 134, CI acid red 138, CI acid red 143, CI acid red 145, CI acid red 150, CI acid red 151, CI acid red 158, CI acid red 176, CI acid red 182, CI acid red 183, CI acid red 195, CI acid red 198, CI acid red 206, CI acid red 211, CI acid red 215, CI acid red 216, CI acid red 217 , CI Acid Red 227, CI Acid Red 228, CI Acid Red 249, CI Acid Red 252, CI Acid Red 257, CI Acid Red 258, CI Acid Red 260, CI Acid Red 261, CI Acid Red 266, CI Acid Red 268 , CI Acid Red 270, CI Acid Red 274, CI Acid Red 277, CI Acid Red 280, CI Acid Red 281, CI Acid Red 308, CI Acid Red 312, CI Acid Red 315, CI Acid Red 316, CI Acid Red 339 , CI Acid Red 341, CI Acid Red 345, CI Acid Red 346, CI Acid Red 349, CI Acid Red 382, CI Acid Red 383, CI Acid Red 394, CI Acid Red 401, CI Acid Red 412, CI Acid Red 417 , CI acid red 418, CI acid red 422, CI acid red 426; CI direct red 79, CI direct red 82, CI direct red 83, CI direct red 84, CI direct red 91, CI direct red 92, CI direct red 96 , CI Direct Red 97, CI Direct Red 98, CI Direct Red 99, CI Direct Red 105, CI Direct Red 106, CI Direct Red 107, CI Direct Red 172, CI Direct Red 173, CI Direct Red 176, CI Direct Red 177 , CI Direct Red 179, CI Direct Red 181, CI Direct Red 182, CI Direct Red 184, CI Direct Red 204, CI Direct Red 207, CI Direct Red 211, CI Direct Red 213, CI Direct Red 218, CI Direct Red 220, CI Direct Red 221, CI Direct Red 222, CI Direct Red 232, CI Direct Red 233, CI Direct Red 234, CI Direct Red 241, CI Direct Red 243, CI Direct Red 246, CI direct red 250; CI mordant red 1, CI mordant red 2, CI mordant red 3, CI mordant red 4, CI mordant red 9, CI mordant red 11, CI mordant red 12, CI mordant red 14, CI mordant red 17, CI mordant red 18, CI mordant red 19, CI mordant red 22, CI mordant red 23, CI mordant red 24, CI mordant red 25, CI mordant red 26, CI mordant red 30, CI mordant red 32, CI mordant red 33, CI mordant red 36, CI mordant red 37, CI mordant red 38, CI mordant red 39, CI mordant red 41, CI mordant red 43, CI mordant red 45, CI mordant red 46, CI mordant red 48, CI mordant red 53, CI mordant red 56, CI mordant red 63, CI mordant red 71, CI mordant red 74, CI mordant red 85, CI mordant red 86, CI mordant red 88, CI mordant red 90, CI mordant red 94, CI mordant red 95; Etc., and the green dye can be: CI Solvent Green 1, CI Solvent Green 3, CI Solvent Green 4, CI Solvent 5. CI Solvent Green 7, CI Solvent Green 28, CI Solvent Green 29, CI Solvent Green 32, CI Solvent Green 33, CI Solvent Green 34, CI Solvent Green 35; CI Acid Green 1, CI Acid Green 3, CI Acid Green 5, CI acid green 9, CI acid green 16, CI acid green 25, CI acid green 27, CI acid green 50, CI acid green 65, CI acid green 80, CI acid green 104, CI acid green 106, CI acid green 109; CI direct green 25, CI direct green 27, CI direct green 31, CI direct green 32, CI direct green 34, CI direct green 37, CI direct green 63, CI direct green 65, CI direct green 66, CI direct green 67, CI direct green 68, CI direct green 69, CI direct green 72, CI direct green 77, CI direct green 79, CI direct green 82; CI mord green 1, CI mord green 3, CI mord green 4, CI mord green 5, CI mord green 10, CI mord green 15, CI mord green 19, CI mord green 26, CI mord green 29, CI mord green 33, CI mord green 34, CI mord green 35, CI mord green 41, CI mord green 43. CI mord green 53; etc., but the invention is not limited thereto.

The pigments described can optionally be used with dispersing or dispersing aids.

As the dispersant, a suitable dispersant such as a cationic/anionic/nonionic dispersant or the like may be used, but a polymer dispersant is preferred, and specific examples thereof include an acrylic copolymer, a polyurethane, a polyester, and a polyethyleneimine. And polyallylamine. The dispersant may 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 polyurethanes Acrylic Auxiliaries & Instruments Division), and Solsperse 76500 (Lubrizol); Solsperse 24000 (Lubrizol) as polyethyleneimine; and AJISPER PB821, AJISPER PB822 and AJISPER PB880 as polyester Ajinomoto Fine-Techno Co., Inc.).

The dispersing aid is, for example, a pigment derivative, and specifically, a copper phthalocyanine, a diketopyrrolopyrrole, a sulfonic acid derivative of quinacridone or the like.

The dispersing agent may be used singly or in combination of two or more. The content of the dispersant is usually 1 part by weight or less, preferably 0.1 part by weight to 0.7 part by weight, and more preferably 0.05 part by weight to 0.5 part by weight, based on 1 part by weight of the yellow coloring agent. When the content of the dispersant is too large, developability or the like may be impaired.

Metal oxide

According to one aspect of the present invention, the yellow curable resin composition contains a metal oxide, and thus it is advantageous in that a color filter and an image display device manufactured using the composition can have improved color reproducibility and enhanced brightness.

The metal oxide is specifically ZnO, ZrO ₂ , BaTiO ₃ , TiO ₂ , SiON, Ta ₂ O ₅ , Ti ₃ O ₅ , ITO, IZO, ATO, ZnO-Al, Nb ₂ O ₃ , SnO, etc., but The invention is not limited to this.

More specifically, it is preferred to use one or more selected from the group consisting of TiO ₂ , Al ₂ O ₃ , ZrO ₂ , ZnO, and SiO ₂ as a metal oxide, thereby further increasing the emission from the self-luminous layer. The intensity of light.

The metal oxide may be included in an amount of from 1% by weight to 40% by weight, based on the total solid content of the 100% by weight of the yellow curable resin composition, and the amount thereof is preferably from 3% by weight to 30% by weight. More preferably, it is 5% by weight to 20% by weight. When the content of the metal oxide is less than the above range, the effect of increasing the luminescence intensity cannot be achieved. Further, when the content of the metal oxide exceeds the above range, the relative content of the photosensitive component in the yellow curable resin composition is decreased, which may make it difficult to realize the pixel pattern.

According to an embodiment of the present invention, the yellow curable resin composition may further comprise one or more of the following groups: an alkali soluble resin, a photopolymerizable compound, a photopolymerizable initiator, a solvent, and additive.

Alkali soluble resin

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

The alkali-soluble resin has thermal reactivity, is soluble in alkali, acts as a dispersion medium for a solid such as a colorant, and functions as a binder resin. As the alkali-soluble resin, any binder resin which is soluble in the alkaline developing solution used in the film forming step of forming a film using the resin composition can be used.

The alkali-soluble resin may have an acid value of from 20 (KOH mg/g) to 200 (KOH mg/g), wherein the acid value means the amount of potassium hydroxide required to neutralize 1 gram of the acrylic polymer (in milligrams) And involves 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 range, the adhesion of the alkali-soluble resin to the substrate is lowered, the possibility of short-circuiting in the pattern is high, and the storage stability of the entire composition is lowered, resulting in viscosity. increase.

Further, the alkali-soluble resin preferably has a weight average molecular weight of 3,000 Daltons (Da) to 200,000 Daltons, and more preferably 5,000 Daltons to 100,000 Daltons, and can be purchased from a manufacturer or in an experiment. 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 use in a color filter. An alkali-soluble resin having a molecular weight and a molecular weight distribution within the above range is advantageous in that it has an improved hardness and a high residual film ratio, and an unexposed portion of the resin is highly soluble in the developer, and the resin can contribute to an improvement in resolution. .

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

Specific examples of the monomer having an unsaturated bond and a carboxyl group include monocarboxylic acids such as acrylic acid, methacrylic acid and crotonic acid; dicarboxylic acids such as fumaric acid, mesaconic acid and itaconic acid. An acid anhydride of a dicarboxylic acid; a mono(meth)acrylate of a polymer having a carboxyl group and a hydroxyl group at each terminal, for example, ω-carboxypolycaprolactone mono(meth)acrylate.

More specifically, the monomer having an unsaturated bond and a carboxyl group may be acrylic acid, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, fumaric acid, alkyl maleate, etc., wherein maleic acid The alkyl ester may be monomethyl maleate, ethyl maleate, n-propyl maleate, isopropyl maleate, n-butyl maleate, n-hexyl maleate, n-octyl maleate. Ester, 2-ethylhexyl maleate, n-decyl maleate, n-dodecyl maleate, and the like.

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

As the monomer copolymerizable with the first monomer, a monomer selected from the group consisting of an aromatic vinyl compound, an unsaturated carboxylic acid ester compound, an unsaturated carboxylic acid aminoalkyl ester compound, and an unsaturated group can be used. a glycidyl carboxylate compound, a carboxylic acid vinyl ester compound, an unsaturated ether compound, an acrylonitrile compound, an unsaturated quinone imine compound, an aliphatic conjugated diene compound, a monopropylene fluorenyl group or a monomethyl group at the end of a molecular chain Alkene monomer, bulky monomer, 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, meta-vinyl Benzyl glycidyl ether or p-vinylbenzyl glycidyl ether; alkyl (meth)acrylate, such as methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, Isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, dibutyl (meth)acrylate or tert-butyl (meth)acrylate; alicyclic (Meth) acrylate, such as cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-methylcyclohexyl (meth) acrylate, tricyclo(methyl) acrylate [5.2.1.0 .2.6] decane-8-yl ester, 2-dicyclopentyloxyethyl (meth)acrylate, or isobornyl (meth)acrylate; aryl (meth) acrylate, such as (methyl) C Benzyl acrylate or benzyl (meth) acrylate; hydroxyalkyl (meth) acrylate, such as 2-hydroxyethyl (meth) acrylate or 2-hydroxypropyl (meth) acrylate; N-substituted Maleic imine compound, such as N-cyclohexylmaleimide, N-benzylmaleimide, N-phenylmaleimide, N-o-hydroxyphenylmaleimide, N-m-hydroxyphenylmaleimide, N-p-hydroxyphenylmaleimide, N-o-methylphenylmaleimide, N-m-methylphenylmaleimide, N-p-methylphenylmaleimide, N-o-methoxyphenylmaleimide, N-m-methoxyphenylmaleimide, or N-p-methoxyphenyl Maleic imine; unsaturated guanamine compound, such as (meth) acrylamide or N, N'-dimethyl (meth) acrylamide; unsaturated oxetane compound, for example 3-methylpropenyloxymethyloxetane, 3-methylpropenyloxymethyl-3-ethyloxetane, 3-methylpropenyloxymethyl-2- Trifluoromethyloxetane, 3-methacryloxymethyl-2-phenyloxetane, 2-methylpropenyloxymethyloxane Alkyl, or 2-methyl-4-trifluoromethyl group Bingxi Xi oxetane.

The alkali-soluble resin may be contained in an amount of 2% by weight to 80% by weight, based on the total solid content of the 100% by weight of the yellow curable resin composition, and the amount thereof is preferably 5% by weight to 75% by weight, and More preferably, it is 10% by weight to 70% by weight. When the content of the alkali-soluble resin is within the above range, a yellow coating layer can be easily formed, and during the process including development, the non-pixel region can be satisfactorily removed because the exposed portion of the pixel region during development is prevented The membrane is reduced.

Photopolymerizable compound

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

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

Specific examples of the monofunctional photopolymerizable compound include: nonylphenylcarbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, 2-hydroxy acrylate Ethyl ester, N-vinylpyrrolidone, and commercially available products such as ARONIX M-101 (Toagosei Co., Ltd.), KAYARAD TC-110S (Nippon Kayaku Co., Ltd.) , Ltd.)), or Viscoat 158 (Osaka Yuki Chemical Co., Ltd.) and the like.

Specific examples of the difunctional photopolymerizable compound include: 1,6-hexanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, Triethylene glycol di(meth)acrylate, bisphenol A bis(propylene oxiranyl)ether, 3-methylpentanediol di(meth)acrylate, and commercially available products such as ARONIX M-210, M-1100, M-1200 (East Asia Synthetic Co., Ltd.), KAYARAD HDDA (Nippon Chemical Co., Ltd.), Viscoat 260 (Osaka Organic Chemical Co., Ltd.), AH-600, AT-600, or UA-306H (Kyoeisha) Chemical Co., Ltd. (Kyoeisha Chemical Co., Ltd.)).

Specific examples of at least trifunctional polyfunctional photopolymerizable compounds include: trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylation Trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, ethoxylated dipentaerythritol six (a) Acrylate, propoxylated dipentaerythritol hexa(meth) acrylate, dipentaerythritol hexa(meth) acrylate, and commercially available products such as ARONIX M-309, TO-1382 (East Asia Synthetic Co., Ltd.), KAYARAD TMPTA, KAYARAD DPHA, or KAYARAD DPHA-40H (Nippon Chemical Co., Ltd.).

Among the examples of the photopolymerizable compounds listed above, particularly preferred are at least trifunctional urethane (meth) acrylates and (meth) acrylates because of their excellent polymerizability and Can help to increase strength.

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

The photopolymerizable compound may be contained in an amount of from 5% by weight to 70% by weight, based on the total solid content of the 100% by weight of the yellow curable resin composition, preferably in an amount of from 10% by weight to 60% by weight, More preferably, it is 15% by weight to 50% by weight. When the content of the photopolymerizable compound is within the above range, a pixel layer having satisfactory strength and smoothness can be produced.

Photopolymerizable initiator

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

The photopolymerizable initiator is not limited to a specific type as long as the photopolymerizable compound can be polymerized. Specifically, the photopolymerizable initiator is preferably one or more compounds selected from the group consisting of acetophenone compounds, and two, in view of polymerization characteristics, initial efficiency, absorption wavelength, availability, price, and the like. A benzophenone compound, a triazine compound, a biimidazole compound, an anthraquinone compound, and a thioxanthone compound.

Specific examples of the acetophenone compound include: diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethylketal, 2-hydroxy-1- [4-(2-Hydroxyethoxy)phenyl]-2-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl) -2-morpholinylpropan-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- Morpholinylphenyl)butan-1-one.

Examples of the benzophenone compound include: benzophenone, methyl ortho-benzoylbenzoate, 4-phenylbenzophenone, 4-benzylidene-4'-methyldiphenyl sulfide. 3,3',4,4'-tetrakis(t-butylperoxycarbonyl)benzophenone, and 2,4,6-trimethylbenzophenone.

Specific examples of the triazine compound include: 2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-bis(trichloromethane) 6-(4-methoxynaphthyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-mallowyl-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)ethylene 1,1,3,5-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 the biimidazole compound include: 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2,3-di Chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(alkoxy) Phenyl)biimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetrakis(trialkoxyphenyl)biimidazole, 2,2-bis(2, 6-Dichlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole, and the phenyl group at the 4, 4', 5 and 5' positions thereof is alkoxycarbonyl ( Carboalkoxy) substituted imidazole compound. Among the biimidazole compounds listed above, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis (preferably) 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 the ruthenium compound 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-propoxythioxanthene ketone.

Further, a photopolymerizable initiator other than the photopolymerizable initiator listed above may be further contained insofar as the effects of the present invention are not impaired. Examples of such a substance include a benzoin compound and an anthraquinone compound, which may be used singly or in combination of two or more.

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

Examples of the ruthenium compound include: 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, and 2-ethyl-9,10. - Diethoxy hydrazine.

Examples of other materials which may be further included as a photopolymerizable initiator include: 2,4,6-trimethylbenzimidyldiphenylphosphine oxide, 10-butyl-2-chloroacridine Ketone, 2-ethylhydrazine, benzyl-9,10-phenanthrenequinone, camphorquinone, methylphenylglyoxylate, and titanocene compound.

The photopolymerizable initiator may be included in an amount of from 0.1% by weight to 40% by weight based on the total solid content of the 100% by weight of the yellow curable resin composition, and the amount thereof is preferably from 0.5% by weight to 35% by weight. %, and more preferably from 1% by weight to 30% by weight. When the content of the photopolymerizable initiator is within the above range, the yellow curable resin composition obtains higher sensitivity, and thus the exposure time is shortened and the productivity is improved, and high resolution can be maintained. Moreover, the composition forms a pixel layer having satisfactory strength and surface smoothness under the above conditions.

Further, in order to increase the sensitivity of the yellow curable resin composition, a photopolymerizable starting assistant may be further included. When the composition contains such a photopolymerizable starter, the sensitivity can be further improved and the productivity can be improved.

One or more compounds selected from the group consisting of a free amine compound, a carboxylic acid compound, and an organic sulfur compound having a thiol group are exemplary compounds which are preferably used as a photopolymerizable starting assistant.

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; -ethyl dimethylaminobenzoate; isoamyl 4-(dimethylamino)benzoate; 2-ethylhexyl-4-dimethylaminobenzoate; 2-dimethyl benzoate Ethylaminoethyl ester; N,N-dimethyl-p-toluidine; 4,4'-bis(dimethylamino)benzophenone (also known as Michler's ketone); 4'-bis(diethylamino)benzophenone; and the like.

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

Specific examples of the organic sulfur compound having a thiol group include 2-mercaptobenzothiazole, 1,4-bis(3-mercaptobutyloxy)butane, and 1,3,5-tris(3-mercaptobutoxy) Base ethyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, trimethylolpropane tris(3-mercaptopropionate), pentaerythritol tetrakis(3- Mercaptobutyrate), pentaerythritol tetrakis(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) can also be used as photoinitiator additives. These products may be used alone or in combination of two or more.

The photopolymerizable starting aid may be included in the same range as the photopolymerizable starter. When the content of the photopolymerizable starter auxiliary is within the above range, the yellow curable resin composition containing the photopolymerizable starter aid obtains higher sensitivity, and the composition is used for color filter production. At the time of filming, a color filter with improved productivity is produced.

Solvent

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

The solvent is not limited to a specific type, but may be an organic solvent conventionally used in the art. 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 of an ether, an aromatic hydrocarbon, a ketone, an alcohol, an ester, and a decylamine may be included as a part of the solvent. More specific examples of the solvent include: ethylene glycol monoalkyl ether such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, and ethylene glycol monobutyl ether; diethylene glycol dioxane Ether ethers, such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, and diethylene glycol dibutyl ether; ethylene glycol alkyl ether acetate, such as acetic acid 2- Methyl cellosolve acetate and ethyl cellosolve acetate; propylene glycol dialkyl ether, such as propylene glycol monomethyl ether; alkyl glycol alkyl ether acetate, 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 Alcohols, and glycerols; esters such as ethyl 3-ethoxypropionate and methyl 3-methoxypropionate; cyclic esters such as γ-butyrolactone. These materials may be used singly 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 is from 5% by weight to 90% by weight, and preferably 15% by weight in the above-mentioned yellow cured resin composition. % to 80% by weight. This content range is selected in accordance with the dispersion stability of the composition and the ease of processing (e.g., applicability) in the production process.

additive

According to one embodiment of the present invention, the yellow curable resin composition may further contain additives such as fillers, other polymer compounds, surfactants, as desired by those skilled in the art, without departing from the object of the present invention. , adhesion promoters, antioxidants, UV absorbers, retarders, or curing agents.

Specific examples of the filler include: glass, cerium oxide, and aluminum oxide.

Specific examples of other polymer compounds include: curable resins such as epoxy resins and maleic imine resins; and thermoplastic resins such as polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether, polyfluoroalkyl Acrylates, polyesters, and polyurethanes.

The surfactant is a component for improving the film forming ability of the yellow curable resin composition. Examples of the surfactant include: polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyethylene glycol diester, sorbitan fatty acid ester, fatty acid modified polyester, triamine 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), FlouradTM Series (Sumitomo 3M Limited), AsahiGuard Series and SURFLON Series (Asahi Glass Co., Ltd) .)), Solsperse ^TM series (Lubrizol), Efka® series (BASF), and AJISPER PB821 (Ajinomoto Fine Chemical Co., Ltd.).

Examples of adhesion promoters include: vinyl trimethoxy decane, vinyl triethoxy decane, vinyl tris(2-methoxyethoxy) decane, N-(2-aminoethyl)-3- Aminopropylmethyldimethoxydecane, N-(2-aminoethyl)-3-aminopropyltrimethoxydecane, 3-aminopropyltriethoxydecane, 3-glycidol Oxypropyltrimethoxydecane, 3-glycidoxypropylmethyldimethoxydecane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxydecane, 3-chloropropylmethyl Dimethoxy decane, 3-chloropropyltrimethoxydecane, 3-methylpropenyloxypropyltrimethoxydecane, and 3-mercaptopropyltrimethoxydecane.

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

The ultraviolet absorber may specifically be 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5-chlorobenzotriazole, alkoxybenzophenone or the like. The retarder may specifically 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 the curing agent include an epoxy compound, a polyfunctional isocyanate compound, a melamine compound, and an oxetane compound.

The epoxy compound is not limited to a specific type, and is, for example, a bisphenol A type epoxy resin, a hydrogenated bisphenol A type epoxy resin, a bisphenol F type epoxy resin, a hydrogenated bisphenol F type epoxy resin, a phenol type epoxy Resins, other aromatic epoxy resins, cycloaliphatic epoxy resins, glycidyl ester resins, glycidylamine resins, or brominated derivatives of such epoxy resins; aliphatics other than the epoxy resins listed above , alicyclic or aromatic epoxy compounds and brominated derivatives of such epoxy resins; epoxidized butadiene (co)polymers; epoxidized isoprene (co)polymers; (meth)acrylic acid Glycidyl ester (co)polymer; triglycidyl isocyanurate; and the like.

The oxetane compound is not limited to a specific type, and is, for example, carbonate dioxetane, xylene dioxetane, adipate dioxetane, terephthalic acid Ester dioxetane, cyclohexane dicarboxylic acid dioxetane, and the like.

Further, in order to further increase the degree of curing, the yellow curable resin composition according to the present invention may further include a curing assistant. The curing assistant which can be used in the present invention is not limited to a specific type, but can be any curing assistant known in the art.

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

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

For example, the yellow colorant is first mixed with a solvent and dispersed in a solvent using a bead mill or the like until the average particle diameter of the colorant reaches about 0.2 μm 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. In the obtained dispersion (hereinafter referred to as a grinding base), the remaining alkali-soluble resin, photopolymerizable compound, photopolymerizable initiator, other components which may be used as needed, and optionally used Additional solvent is further added to a predetermined concentration to obtain a desired yellow curable resin composition.

The yellow curable resin composition thus prepared can be used for producing a color filter by wet coating, for which a coating device such as a roll coater, a spin coater, a slit and a spin coater, and a narrow can be used. A seam coater (sometimes referred to as a die coater) and an inkjet.

<Color Filter>

Another aspect of the present invention provides a color filter comprising: a yellow coating layer comprising a cured product of a yellow curable resin composition; and a self-luminous pixel layer, the self-luminous pixel layer Formed on the yellow coating and comprising quantum dots.

The pixel layer of the color filter is a self-luminous pixel layer containing quantum dots, and in order to absorb the blue emission spectrum, a separate yellow colorant layer is formed in contact with the self-luminous pixel layer instead of the yellow colorant and quantum The dots are included together in the self-illuminating pixel layer. That is, the light emitted by the quantum dots produces a specific wavelength, in which case, when the yellow colorant is contained in the self-luminous pixel layer, the emitted red, blue, and green light are not emitted outside 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 is preferably disposed opposite to the light source. When a yellow colorant is disposed between the light source and the self-luminous pixel layer, the desired effect may not be ensured.

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 a position of a color filter with respect to a light source in the present invention.

Referring to FIGS. 1 and 2, the color filter may include, for example, a substrate 11; a yellow coating layer 13 formed on the substrate 11, and a self-luminous pixel layer 15 formed on the yellow coating layer 13.

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

The yellow coating layer 13 only displays green at the green pixel layer 15B where green and blue are mixed, and only red 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 effects may be affected by the content of the yellow colorant in the yellow coating layer 13 and the thickness of the yellow coating layer 13. For example, the yellow coating 13 can be formed to a thickness of 1 micrometer to 5 micrometers. When the thickness is less than the above range, the above effects may not be ensured, and a thickness exceeding the range provided above does not produce a significant benefit.

In the color filter according to the present invention, the substrate 11 may be a substrate of the color filter itself or a portion of the display device on which the color filter is disposed, and the like, and is not particularly limited. May be a glass substrate, silicon (Si), silicon oxide (SiO _x), or a substrate made of a polymer, and the polymer for the polymer substrate may be a polyether sulfone (polyethersulfone, PES), polycarbonate ( Polycarbonate, PC), etc.

The self-luminous pixel layer 15 as a layer containing quantum dots is produced based on a self-luminous photosensitive resin composition including a photoluminescence quantum dot, an alkali-soluble resin, a photopolymerizable compound, Photopolymerizable initiator, and solvent. In this case, the types and contents of the alkali-soluble resin, the photopolymerizable compound, the photopolymerizable initiator, and the solvent follow the description of the yellow curable resin composition provided above.

Quantum dots are nanometer-sized semiconductor materials. Atom forms a molecule which forms a nanoparticle by forming a small molecule aggregate called a cluster, and when it has particularly semiconductor characteristics, such a nanoparticle is called a quantum dot. When a quantum dot receives energy from the outside and reaches an excited state, it emits energy according to its corresponding energy band gap.

By including such photoluminescent quantum dot particles, the color filter can emit light ("photoluminescence") when irradiated with light.

The quantum dot is not limited to a specific type as long as it can emit light when stimulated with light. For example, a substance selected from the group consisting of a Group II-VI semiconductor compound; a Group III-V semiconductor compound; a Group IV-VI semiconductor compound; a Group IV element or a compound containing the same; and combinations thereof may be used. . Such materials may be used singly or in combination of two or more.

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 compound: CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, and mixtures thereof; or Elemental compounds: CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof. The III-V semiconductor compound may be a binary compound selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and mixtures thereof; 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 of four Elemental compounds: GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and mixtures thereof. The IV-VI semiconductor compound may be a binary compound selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof; ternary compounds selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof; or quaternary compounds selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof. The Group IV element or compound containing the same may be a single elemental compound selected from the group consisting of Si, Ge, and mixtures thereof; or a binary compound selected from the group consisting of SiC, SiGe, and mixtures thereof.

In addition, the quantum dots may have a single-weight 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 different from each other among the semiconductor compounds listed above. For example, the core may include one or more substances selected from the group consisting of CdSe, CdS, ZnS, ZnSe, CdTe, CdSeTe, CdZnS, PbSe, AgInZnS, and ZnO, but the invention is not limited thereto. The shell may include one or more substances selected from the group consisting of CdSe, ZnSe, ZnS, ZnTe, CdTe, PbS, TiO, SrSe, and HgSe, but the invention is not limited thereto.

The colored photosensitive resin composition for producing a conventional color filter includes red, green, and blue colorants for color development, and the color filter according to the present invention may include one selected from the group below. Or a variety of substances: quantum dots that emit red light, quantum dots that emit green light, and quantum dots that emit blue light.

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 a precursor material to an organic solvent. When the crystal grows, the organic solvent functions as a dispersing agent by controlling the natural coordination on the surface of the quantum dot crystal and controls crystal growth, and thus can be deposited by vapor phase (for example, metal organic chemical vapor deposition or molecular beam lei). Crystal) an easier and cheaper process to control the growth of nanoparticles.

The self-luminous photosensitive resin composition containing such quantum dots may comprise from 3% by weight to 80% by weight of quantum dots, from 5% by weight to 80% by weight of alkali-soluble resin, based on 100% by weight of the entire composition, From about 100% by weight of the photopolymerizable compound, and from 0.1% by weight to 20% by weight of the photopolymerizable starter. Further, the composition may further contain the above additives.

The color filter can be manufactured by the following exemplary method, but the present invention is not limited thereto, and the order of the steps described below can be changed according to the needs of the designer. S1) forming a yellow coating layer 13 on the substrate 11; S2) forming partition walls 51A, 51B, and 51C for defining a red pixel region, a blue pixel region, and a green pixel region on the yellow coating layer 13; and S3) in the pixel Self-luminous pixel layers 15, 15A, 15B are formed in the regions (see FIGS. 1 and 2).

In this case, a yellow coating layer is formed only on the red pixel layer 15A and the green pixel layer 15B.

The partition wall, the self-illuminating pixel layer, and the yellow coating layer may be formed by 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 as needed.

<Image display device>

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

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

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-described color filter, the light source is preferably a light source that emits blue light in view of better color reproducibility, but the present invention is not limited thereto.

According to another embodiment of the present invention, an image display device according to the present invention may be provided with a color filter including only two of a red pattern layer, a green pattern layer, and a blue pattern layer. In this case, the color filter further includes a transparent pattern layer containing no quantum dot particles.

When only two types of pattern layers are included, a light source that emits light corresponding to the wavelength of the excluded color may be used. For example, when a red pattern layer and a green pattern layer are included in the color filter, a blue light source 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.

This image display device has excellent luminous efficacy, and thus exhibits high luminance and excellent color reproducibility.

Hereinafter, the present invention will be described in detail by way of exemplary embodiments. However, modifications may be made in various other forms in accordance with the embodiments of the present specification, and the scope of the present description should not be construed as being limited to the embodiments provided below. The description of the present specification is provided to more thoroughly and completely describe the present specification to those skilled in the art. In addition, the terms describing the content of the substance (for example, "%" and "parts") are by weight unless otherwise specified.

Production Example 1: Synthesis of photoluminescent green quantum dot particles having a CdSe/ZnS core-shell structure

0.4 mmol of CdO, 4 mmol of zinc acetate, 5.5 ml of oleic acid, and 20 ml of 1-octadecene were placed in the reactor and reacted by heating to 150 °C. Then, in order to remove acetic acid produced by substituting oleic acid for zinc, the reaction product was maintained under a vacuum of 100 mTorr for 20 minutes.

Next, the material was heated at 310 ° C to give a clear mixture which was held at 310 ° C for 20 minutes and was dissolved in 3 ml of trioctylphosphine by dissolving 0.4 mmol of Se powder and 2.3 mmol of S powder. The prepared solution of Se and S was quickly injected into a reactor containing a solution of Cd(OA) ₂ and Zn(OA) ₂ .

The resulting mixture was grown at 310 ° C for 5 minutes until growth was 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 stabilized with oleic acid and having a CdSe (nuclear)/ZnS (shell) structure and having a total of core diameter to shell thickness of 3 nm to 5 nm were obtained.

Production Example 2: Synthesis of alkali soluble resin

A flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel, and a nitrogen injection tube was prepared. 45 parts by weight of N-benzyl maleimide, 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 was mixed and stirred to equip a monomer dropping funnel. Separately, 6 parts by weight of n-dodecanediol was mixed with 24 parts by weight of propylene glycol monomethyl ether acetate and stirred to equip a dropping funnel of a 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 raised to 90 ° C while stirring.

Subsequently, the monomer and chain transfer agent were dropped from their respective dropping funnels into the flask. The mixture was dropped for 2 hours while the temperature of the material was maintained at 90 °C. After 1 hour, the temperature was raised to 110 ° C and maintained at 110 ° C for 3 hours. Then, a gas injection pipe was introduced to start bubbling of a mixed gas of oxygen/nitrogen = 5/95 (vol/vol).

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. 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 mgKOH/g.

Production Example 3: Preparation of Self-luminous Photosensitive Resin Composition

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 solid content of 20% by weight. Then, the materials were thoroughly stirred to obtain a self-luminous photosensitive resin composition.

Examples 1 to 8 and Comparative Examples 1 to 4: Preparation of Yellow Curable Resin Composition

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 solid content of 20% by weight. Then, the materials were thoroughly stirred to obtain a yellow curable resin composition.

Experimental Example 1: Analysis of Transmission Characteristics of Yellow Curable Resin Composition

The transmission characteristics of the yellow curable resin compositions prepared according to Examples 1 to 8 and Comparative Examples 1 to 4 were measured as follows.

First, the yellow curable resin compositions prepared according to Examples 1 to 8 and Comparative Examples 1 to 4 were respectively coated on a 5 cm × 5 cm glass substrate by spin coating (EAGLE ^2000TM ; Corning Inc.) The coated substrate was placed on a hot plate at a temperature of 100 ° C for three minutes to form a film.

Subsequently, an ultrahigh pressure mercury lamp (USH-250D) manufactured by Ushio Inc. was used in an air atmosphere at an exposure (365 nm) of 200 mJ/cm ² (mJ/cm ² ). Light is irradiated, but there is no specific filter. Then, it was heated in a heating oven at 150 ° C for 10 minutes to prepare a yellow coating layer having a thickness of 2 μm.

The transmittance of the yellow coating was measured by OSP-SP2000 colorimetry manufactured by Olympus Corporation, and the results are shown in Table 3 provided below. In this case, a lower transmittance means that the yellow coating has a better wavelength absorption effect.

Yellow coatings based on the same type of yellow colorant, namely Examples 1 to 5 and Comparative Example 1; Example 6 and Comparative Example 2; Example 7 and Comparative Example 3; and Example 8 and Comparative Example 4 were compared with each other. As shown in Table 3, the case of the metal oxide according to the present invention was also contained in the composition as compared with the case where the composition did not contain the metal oxide according to the present invention (Comparative Examples 1 to 4) (Example 1 to Under 8), a lower transmittance was observed.

Production Example 4: Manufacturing of Color Filters

Various color filters were prepared using the self-luminous photosensitive resin composition prepared according to Production Example 3 and the yellow curable resin compositions prepared according to Examples 1 to 8 and Comparative Examples 1 to 4.

(1) Forming a yellow curable resin layer

First, the yellow curable resin compositions prepared according to Examples 1 to 8 and Comparative Examples 1 to 4 were applied by spin coating on a 5 cm × 5 cm glass substrate (EAGLE ^2000TM ; Corning) and The coated substrate was placed on a hot plate at a temperature of 100 ° C for three minutes to form a film.

Subsequently, light irradiation was performed in an air atmosphere at an exposure (365 nm) of 100 mJ/cm 2 using an ultrahigh pressure mercury lamp (USH-250D) produced by Japan Oxtail Co., Ltd., but there was no specific filter.

The ultraviolet-irradiated film as described above was immersed in a KOH developing aqueous solution of pH 10.5 for development for 80 seconds. The film-coated glass substrate was washed with distilled water, dried by blowing with nitrogen, and heated in a heating furnace at 230 ° C for 20 minutes to produce a yellow curable resin layer having a thickness of 2 μm.

(2) forming a self-luminous pixel layer

A self-luminous pixel layer having a thickness of 5 μm was formed on each of the yellow curable resin layers produced by using the compositions of Examples 1 to 8 and Comparative Examples 1 to 4 according to the method described in the above (1). This self-luminous pixel layer was formed in the same manner as the method described in the above (1), using the self-luminous photosensitive resin composition of Production Example 3.

Experimental Example 2: Analysis of light source transmission spectrum and luminous intensity of a color filter

The light source transmission spectrum (transmission intensity) of the color filter including the yellow coating layer produced using the yellow curable resin compositions of Examples 1 to 8 and Comparative Examples 1 to 4 was measured, and was used by Ocean Optics Inc. (Ocean) The spectroscopic measurement obtained by Optics, Inc.) measures the luminous intensity of the self-luminous layer contained therein, and the results are listed in Table 4 provided below. In this case, XLamp® XR-E Royal Blue having a blue light source with a median wavelength of 450 nm obtained from Cree, Inc. was used as a light source.

In the results, the transmission intensity at the 450 nm light source region was lower, and the luminescence intensity at the 520 nm illumination region was higher, indicating higher color purity and better luminescent properties.

Color filters based on the same type of yellow colorant, namely Examples 1 to 5 and Comparative Example 1; Example 6 and Comparative Example 2; Example 7 and Comparative Example 3; Example 8 and Comparative Example 4 were compared with each other. As shown in Table 4, the case of the metal oxide according to the present invention was also contained in the composition as compared with the case where the composition did not contain the metal oxide according to the present invention (Comparative Examples 1 to 4) (Example 1 to In 8), it was observed that the transmission intensity at a wavelength of 450 nm was low, and the luminescence intensity at a wavelength of 520 nm was high.

Claims (10)

 A yellow curable resin composition comprising a yellow colorant and a metal oxide.    The yellow curable resin composition according to claim 1, further comprising one or more selected from the group consisting of red or green colorants, alkali soluble resins, photopolymerizable compounds, photopolymerizable starting materials Agents, solvents and additives.   The yellow curable resin composition according to claim 1, wherein the yellow colorant satisfies a transmission characteristic described by Mathematical Expression 1 provided below: [Mathematical Expression 1] 50 T( λ ) 60%; T(λ-20nm)<2%; and T( λ +20nm) 80%, wherein in Mathematical Expression 1, T is the transmittance (%), and λ is a wavelength selected from the range of 470 nm (nm) to 510 nm.  The yellow curable resin composition according to claim 1, wherein the yellow colorant comprises one or more selected from the group consisting of C.I. Pigment Yellow 138, C.I. Pigment Yellow 185, and C.I. Pigment Yellow 231.    The yellow curable resin composition according to claim 1, wherein the yellow colorant is contained in an amount of from 5 to 80% by weight based on 100% by weight of the total solid content of the yellow curable resin composition Inside.   The yellow curable resin composition according to claim 1, wherein the metal oxide is one or more selected from the group consisting of TiO ₂ , Al ₂ O ₃ , ZrO ₂ , ZnO, and SiO ₂ .  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 6; and a self-luminous pixel layer, the self-luminous pixel A layer is formed on the yellow coating and contains quantum dots.    The color filter of claim 7, wherein the yellow coating is formed on the red pixel layer and the green pixel layer.    An image display device comprising the color filter of claim 7.    The image display device of claim 9, wherein the yellow coating layer included in the color filter is disposed opposite to the light source.