KR102297066B1 - Yellow curable resin composition, and color filter comprising thereof and display device comprising of the same - Google Patents

Abstract

The yellow curable resin composition according to the present invention has a transmittance (T _λ ) of 50 to 60% at a wavelength of 470 nm to 510 nm, and a yellow colorant satisfying the transmission characteristics of Equation 1 below; and at least one thermosetting agent selected from the group consisting of a polyfunctional alicyclic epoxy resin, a silane-modified epoxy resin, and a novolak-type epoxy resin, wherein the thermosetting agent is 5 to 100 parts by weight of the total solid content of the yellow curable resin composition. It is characterized in that it is included in an amount of 20 parts by weight.
[Equation 1]
T _(λ-20nm) < 2%
T _(λ+20nm) ≥ 90%
(In Equation 1 above,
T is the transmittance (%),
λ means a wavelength of 470 nm to 510 nm).
The yellow curable resin composition according to the present invention is advantageous in that it prevents yellowing at high temperature and external light reflection, and has excellent heat resistance, so that a high-quality color filter can be manufactured.

Description

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

The present invention relates to a yellow curable resin composition, a color filter comprising the same, and an image display device.

A color filter is a thin film-type optical component that extracts three colors of red, green, and blue from white light and makes it possible in fine pixel units, and the size of one pixel is tens to hundreds of micrometers. Such a color filter includes a black matrix layer formed in a predetermined pattern on a transparent substrate to block light at a boundary between each pixel, and a plurality of colors (typically red (R), green (G) and The pixel units in which the three primary colors of blue (B) are arranged in a predetermined order have a structure in which they are sequentially stacked.

Recently, as one of the methods for implementing a color filter, a pigment dispersion method using a pigment-dispersed photosensitive resin is applied. Efficiency is lowered, and color reproduction is deteriorated due to the characteristics of the pigment included in the color filter.

In particular, as color filters are used in various fields including various image display devices, performance such as excellent high brightness and high contrast ratio along with excellent pattern characteristics as well as high color gamut are required. A method for manufacturing a color filter using a self-luminous photosensitive resin composition comprising

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

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

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

Therefore, there is a limitation in reproducibly displaying a desired color, and there is a problem in that image quality may be somewhat deteriorated due to reflection of external light.

Therefore, there is a demand for the development of a photosensitive resin composition capable of manufacturing a color filter and an image display device with improved color reproducibility and light efficiency.

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

An object of the present invention is to provide a yellow curable resin composition capable of preventing yellowing at high temperature and external light reflection, and having excellent heat resistance to produce a high-quality color filter.

Another object of the present invention is to provide a color filter and an image display device having improved color reproducibility and light efficiency.

_{The present invention relates to a yellow colorant having a transmittance (T λ} ) of 50 to 60% at a wavelength of 470 nm to 510 nm, and satisfying the transmission characteristics of Equation 1 below; and at least one thermosetting agent selected from the group consisting of a polyfunctional alicyclic epoxy resin, a silane-modified epoxy resin, and a novolak-type epoxy resin, wherein the thermosetting agent is 5 to 100 parts by weight of the total solid content of the yellow curable resin composition. It provides a yellow curable resin composition included in 20 parts by weight.

[Equation 1]

T _(λ-20nm) < 2%

T _(λ+20nm) ≥ 90%

(In Equation 1 above,

T is the transmittance (%),

λ means a wavelength of 470 nm to 510 nm).

In addition, the present invention is a yellow coating layer comprising a cured product of the aforementioned yellow curable resin composition; and a self-luminous pixel layer formed on the yellow coating layer and containing quantum dots.

In addition, the present invention provides an image display device including the above-described color filter.

The yellow curable resin composition according to the present invention is advantageous in that it prevents yellowing at high temperature and external light reflection, and has excellent heat resistance, so that a high-quality color filter can be manufactured.

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

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

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

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

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

<Yellow Curable Resin Composition>

In one aspect of the present invention, a transmittance (T _λ ) at a wavelength of 470 nm to 510 nm is 50 to 60%, and a yellow colorant satisfying the transmission characteristics of Equation 1 below; and at least one thermosetting agent selected from the group consisting of a polyfunctional alicyclic epoxy resin, a silane-modified epoxy resin, and a novolak-type epoxy resin, wherein the thermosetting agent is 5 to 100 parts by weight of the total solid content of the yellow curable resin composition. It relates to a yellow curable resin composition contained in 20 parts by weight.

[Equation 1]

T _(λ-20nm) < 2%

T _(λ+20nm) ≥ 90%

(In Equation 1 above,

T is the transmittance (%),

λ means a wavelength of 470 nm to 510 nm).

coloring agent

The yellow curable resin composition according to the present invention has a transmittance (T _λ ) of 50 to 60% at a wavelength of 470 nm to 510 nm, and includes a yellow colorant satisfying the transmission characteristics of Equation 1 below.

[Equation 1]

T _(λ-20nm) < 2%

T _(λ+20nm) ≥ 90%

(In Equation 1 above,

T is the transmittance (%),

λ means a wavelength of 470 nm to 510 nm).

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

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

Specifically, the yellow curable resin composition according to the present invention has a transmittance (T _λ ) of 50 to 60% at a wavelength of 470 nm to 510 nm, and contains a yellow colorant that satisfies the transmittance characteristics of Equation 1, so that of a blue light source Transmittance can be minimized. In particular, by minimizing the loss of green light in the green light emitting layer and minimizing the transmittance of the blue light source, excellent color reproduction characteristics and high light efficiency can be imparted.

The yellow colorant is not particularly limited as long as it satisfies the transmittance and the transmittance characteristics, and may be selected from the following yellow colorants. At this time, as the yellow colorant, a commonly known yellow colorant may be used, and any of pigments, dyes, and dyes may be used. Specific examples include those to which the following color index (C.I.; issued by The Society of Dyers and Colorists) number is assigned. However, it is preferable that the colorant is halogen-free from the viewpoint of reducing the environmental load and affecting the human body.

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

Pyrazolone azo pigment: Pigment Yellow 10;

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

Azomethine pigments: Pigment Yellow 101, 129;

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

isoindolinone pigments: Pigment Yellow 109, 110, 139, 173, 185;

Quinoline pigment: Pigment Yellow 115;

quinophthalone pigments: Pigment Yellow 138, 231;

Polycyclic pigment: Pigment Yellow 148;

Dioxime pigments: Pigment Yellow 153;

Benzimidazolone pigments: Pigment Yellow 154, 175, 180, 181;

Heterocyclic pigment: Pigment Yellow 192;

perinone pigments: Pigment Yellow 196;

Inorganic pigments: Pigment Yellow 30, 31, 32, 119, 157, 162, 184;

Cyanine-based pigments; Xanthene-based pigment; Merocyanine-based pigment; Dipyrrin-based pigments; Arylmethine-based pigments; acridine-based pigments; Coumarin-based pigments; Oxazine-based pigments; Tetrapyrrole pigment.

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

In one embodiment of the present invention, the yellow colorant may be included in an amount of 20 to 60 parts by weight, preferably 40 to 50 parts by weight, based on 100 parts by weight of the total solid content of the yellow curable resin composition.

When the yellow colorant is included within the above range, with reference to Equation 1 above, the transmittance of the blue light source is minimized, particularly in the green light emitting layer, the loss of green light is minimized and the transmittance of the blue light source is minimized, resulting in excellent color It is characterized in that it has the advantage of being able to impart reproducibility and high luminous efficiency.

In another embodiment of the present invention, the yellow colorant is C.I. Pigment Yellow 231, C.I. Pigment Yellow 185 and C.I. It may include one or more pigments selected from the group consisting of Pigment Yellow 138, and in this case, it is preferable because it may be effective in imparting excellent color purity and light efficiency.

The yellow curable resin composition may further include one or more selected from the group consisting of red and green colorants other than the yellow colorant.

The red or green colorant is not particularly limited, and examples thereof include pigments or dyes.

Specifically, as a red pigment, C.I. Pigment Red 177, 179, 202, 206, 207, 208, 209, 215, 216, 220, 224, 226, 242, 243, 245, 254, 255, 264, 265; and the like,

As a green pigment, C.I. Pigment Green 7, 10, 15, 25, 36, 47, 58, 59, 62, 63; and the like, but is not limited thereto.

Also, as a red dye,

C.I. Solvent Red 8, 45, 49, 89, 111, 122, 125, 130, 132, 146, 179;

C.I. Acid Red 1, 4, 8, 14, 17, 18, 26, 27, 29, 31, 34, 35, 37, 42, 44, 50, 51, 52, 57, 66, 73, 80, 87, 88, 91, 92, 94, 97, 103, 111, 114, 129, 133, 134, 138, 143, 145, 150, 151, 158, 176, 182, 183, 195, 198, 206, 211, 215, 216, 217, 227, 228, 249, 252, 257, 258, 260, 261, 266, 268, 270, 274, 277, 280, 281, 308, 312, 315, 316, 339, 341, 345, 346, 349, 382, 383, 394, 401, 412, 417, 418, 422, 426;

C.I. Direct Red 79, 82, 83, 84, 91, 92, 96, 97, 98, 99, 105, 106, 107, 172, 173, 176, 177, 179, 181, 182, 184, 204, 207, 211, 213, 218, 220, 221, 222, 232, 233, 234, 241, 243, 246, 250;

C.I. Modanto Red 1, 2, 3, 4, 9, 11, 12, 14, 17, 18, 19, 22, 23, 24, 25, 26, 30, 32, 33, 36, 37, 38, 39, 41 , 43, 45, 46, 48, 53, 56, 63, 71, 74, 85, 86, 88, 90, 94, 95; and the like,

As a green dye,

C.I. Solvent Green 1, 3, 4, 5, 7, 28, 29, 32, 33, 34, 35;

C.I. acid green 1, 3, 5, 9, 16, 25, 27, 50, 65, 80, 104, 106, 109;

C.I. direct green 25, 27, 31, 32, 34, 37, 63, 65, 66, 67, 68, 69, 72, 77, 79, 82;

C.I. modanto green 1, 3, 4, 5, 10, 15, 19, 26, 29, 33, 34, 35, 41, 43, 53; and dyes such as, but not limited to.

The above-mentioned pigment may be used together with a dispersing agent and a dispersing aid, if necessary.

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

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

These dispersants can be used individually or in mixture of 2 or more types. The content of the dispersant may be generally 1 part by weight or less, preferably 0.1 to 0.7 parts by weight, and more preferably 0.05 to 0.5 parts by weight, based on 1 part by weight of the yellow colorant, and in this case, excellent developability, etc. may be exhibited. desirable.

thermosetting agent

The yellow curable resin composition according to the present invention includes at least one thermosetting agent selected from the group consisting of a polyfunctional alicyclic epoxy resin, a silane-modified epoxy resin, and a novolak-type epoxy resin, and the thermosetting agent is the total solid content of the yellow curable resin composition. It is included in an amount of 5 to 20 parts by weight based on 100 parts by weight.

Preferably, the thermosetting agent may be included in an amount of 8 to 15 parts by weight, more preferably 10 to 15 parts by weight, based on 100 parts by weight of the total solid content of the yellow curable resin composition.

Since the yellow curable resin composition according to the present invention contains the thermosetting agent, the occurrence of yellowing in a high-temperature process is prevented, and the light retention of the luminous efficiency of the quantum dot phosphor does not decrease.

Specifically, since the thermosetting agent according to the present invention is included in the above content range, yellowing does not occur in a high-temperature process, and there is an advantage in that it is possible to suppress a phenomenon in which the light retention rate of the luminous efficiency of the quantum dot phosphor is lowered.

The thermosetting agent may include at least one of a polyfunctional alicyclic epoxy resin and a novolak-type epoxy resin. Specifically, the thermosetting agent is 5 to 20 parts by weight, preferably 8 to 15 parts by weight, of at least one of the polyfunctional alicyclic epoxy resin and the novolak-type epoxy resin, based on 100 parts by weight of the total solid content of the yellow curable resin composition. , More preferably, it may be included in an amount of 10 to 15 parts by weight.

When the polyfunctional alicyclic epoxy resin and/or the novolak-type epoxy resin is included within the above range, the occurrence of yellowing in a high-temperature process is prevented, and the light retention of the luminous efficiency of the quantum dot phosphor is not lowered, so it is preferable. .

In another embodiment of the present invention, the polyfunctional alicyclic epoxy resin may include an alicyclic epoxy resin represented by the following Chemical Formula 1 or 2.

[Formula 1]

[Formula 2]

(In Formula 1,

R is a C1 to C10 alkyl group,

n, m and p are each independently an integer from 1 to 20).

In the present invention, the alkyl group may be straight-chain or branched, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1- Ethyl-butyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethyl Butyl, n-heptyl, 1-methylhexyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2-dimethylheptyl, 1-ethyl-propyl , 1,1-dimethyl-propyl, isohexyl, 2-methylpentyl, 4-methylhexyl, 5-methylhexyl, and the like.

Commercial products of the polyfunctional alicyclic epoxy resin include "CEL-2021" of Daicel Chemical Co., Ltd., alicyclic solid epoxy resin "EHPE-3150", epoxidized polybutadiene "PB3600", and flexible alicyclic epoxy Compound "CEL-2081", lactone-modified epoxy resin "PCL-G", etc. can be used. In addition, Daicel Chemical High School Co., Ltd.'s "Seroxide 2000", "Epolid GT-3000", "GT-4000" (all), etc. can be used, but is not limited thereto.

By using the polyfunctional alicyclic epoxy resin, yellowing does not occur in a high-temperature process, and there is an advantage in that the light retention of the luminous efficiency of the quantum dot phosphor does not decrease.

In another embodiment of the present invention, the novolak-type epoxy resin may include an epoxy resin represented by the following formula (3).

[Formula 3]

(In Formula 3,

q is an integer from 1 to 20).

As a commercially available product of the novolak-type epoxy resin, Sumi Epoxy ESCN 195XL (manufactured by Sumitomo Kagaku Kogyo Co., Ltd.) may be used, but is also not limited thereto.

By using the novolak-type epoxy resin, yellowing does not occur in a high-temperature process, and there is an advantage in that the light retention of the luminous efficiency of the quantum dot phosphor does not decrease.

In another embodiment of the present invention, the silane-modified epoxy resin may be prepared by a dealcoholization condensation reaction between a hydroxyl group-containing epoxy resin and an alkoxysilane.

In another embodiment of the present invention, the hydroxyl group-containing epoxy may be represented by the following formula (4), the alkoxysilane may be represented by the following formula (5).

[Formula 4]

[Formula 5]

R1 _y Si(OR2) _{4 -y}

(In Formula 4,

x is an integer from 1 to 34;

In Formula 5,

y is an integer of 0 or 1,

R1 is a C1 to C6 alkyl group, a C6 to C12 aryl group, or a C2 to C6 unsaturated aliphatic residue that may have a functional group directly linked to a carbon atom;

R2 is a hydrogen atom or a C1 to C6 alkyl group,

a plurality of R2s are the same as or different from each other).

The above-described alkyl group may be applied except that the alkyl group has 1 to 6 carbon atoms.

The aryl group may be a monocyclic aryl group or a polycyclic aryl group. The monocyclic aryl group may be a phenyl group, a biphenyl group, a terphenyl group, a stilbenyl group, and the like, but is not limited thereto. The polycyclic aryl group may be a naphthyl group, an anthracenyl group, a phenanthryl group, a pyrenyl group, a perylenyl group, a chrysenyl group, a fluorenyl group, and the like, but is not limited thereto.

The unsaturated aliphatic residue may be a methacryloyl group or an acryloyl group, but is not limited thereto.

As commercially available products of the silane-modified epoxy resin, Composeran E-101, E-102, E-201, E-202, E-211, E-212 (trade name manufactured by Arakawa Chemical Industry Co., Ltd.), etc. may be used, However, the present invention is not limited thereto.

When the silane-modified epoxy resin is used, yellowing does not occur in a high-temperature process, and there is an advantage in that the light retention of the luminous efficiency of the quantum dot phosphor does not decrease.

Alkali-soluble resin

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

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

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

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

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

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

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

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

The copolymerizable monomer is an aromatic vinyl compound, an unsaturated carboxylic acid ester compound, an unsaturated carboxylic acid aminoalkyl ester compound, an unsaturated carboxylic acid glycidyl ester compound, a carboxylic acid vinyl ester compound, an unsaturated ether compound, and a vinyl cyanide compound. One selected from the group consisting of a compound, an unsaturated imide compound, an aliphatic conjugated diene compound, a macromonomer having a monoacryloyl group or a monomethacryloyl group at the end of the molecular chain, a bulky monomer, and combinations thereof is possible.

Specifically, the copolymerizable monomer is styrene, vinyltoluene, α-methylstyrene, p-chlorostyrene, o-methoxystyrene, m-methoxystyrene, p-methoxystyrene, o-vinylbenzylmethyl ether, m -Aromatic vinyl compounds, such as vinylbenzylmethyl ether, p-vinylbenzylmethyl ether, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl ether, or p-vinylbenzyl glycidyl ether; Methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, alkyl (meth)acrylates such as sec-butyl (meth)acrylate or t-butyl (meth)acrylate; Cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-methylcyclohexyl (meth) acrylate, tricyclo [5.2.1.0.2.6] decan-8-yl (meth) acrylate, 2-dic alicyclic (meth)acrylates such as clofentanyloxyethyl (meth)acrylate or isobornyl (meth)acrylate; aryl (meth)acrylates such as phenyl (meth)acrylate or benzyl (meth)acrylate; hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate or 2-hydroxypropyl (meth)acrylate; N-cyclohexylmaleimide, N-benzylmaleimide, N-phenylmaleimide, No-hydroxyphenylmaleimide, Nm-hydroxyphenylmaleimide, Np-hydroxyphenylmaleimide, No-methylphenylmaleimide, Nm -N-substituted maleimide compounds, such as methylphenylmaleimide, Np-methylphenylmaleimide, No-methoxyphenylmaleimide, Nm-methoxyphenylmaleimide, and Np-methoxyphenylmaleimide; unsaturated amide compounds such as (meth)acrylamide and N,N'-dimethyl (meth)acrylamide; 3-(methacryloyloxymethyl)oxetane, 3-(methacryloyloxymethyl)-3-ethyloxetane, 3-(methacryloyloxymethyl)-2-trifluoromethyloxetane; 3-(methacryloyloxymethyl)-2-phenyloxetane, 2-(methacryloyloxymethyl)oxetane or 2-(methacryloyloxymethyl)-4-trifluoromethyloxetane, etc. of unsaturated oxetane compounds.

The content of the alkali-soluble resin may be included in an amount of 20 to 60 parts by weight, preferably 30 to 40 parts by weight, based on 100 parts by weight of the total solid content of the yellow curable resin composition, and in this case, it is easy to form a yellow coating layer, and a process including a developing process , there is an advantage in that the film reduction of the pixel portion of the exposed portion is prevented during development, and the omission property of the non-pixel portion is improved.

photopolymerization compound

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

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

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

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

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

Among the photopolymerizable compounds exemplified above, trifunctional or higher (meth)acrylic acid esters and urethane (meth)acrylates are particularly preferable in that they have excellent polymerizability and can improve strength.

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

The photopolymerizable compound may be included in an amount of 10 to 50 parts by weight, preferably 20 to 30 parts by weight, based on 100 parts by weight of the total solid content of the yellow curable resin composition, and when the photopolymerizable compound is included within the above range, the strength or There is an advantage that smoothness is good.

light curing initiator

The yellow curable resin composition according to the present invention may further include a photopolymerization initiator.

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

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

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

Specific examples of the triazine-based compound include 2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6 -(4-Methoxynaphthyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-piperonyl-1,3,5-triazine, 2,4-bis (trichloromethyl)-6-(4-methoxystyryl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(5-methylfuran-2- yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(furan-2-yl)ethenyl]-1,3,5-triazine , 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino-2-methylphenyl)ethenyl]-1,3,5-triazine or 2,4-bis(trichloromethyl )-6-[2-(3,4-dimethoxyphenyl)ethenyl]-1,3,5-triazine etc. are mentioned.

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

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

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

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

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

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

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

The photopolymerization initiator may be included in an amount of 1 to 30 parts by weight, preferably 5 to 20 parts by weight, based on 100 parts by weight of the total solid content of the yellow curable resin composition. When the photopolymerization initiator is included within the above range, the yellow curable resin composition is highly sensitive and exposure time is shortened, thereby improving productivity and maintaining high resolution. In addition, there is an advantage in that the strength of the pixel portion formed by using the composition under the above conditions and the smoothness on the surface of the pixel portion are improved.

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

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

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

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

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

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

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

solvent

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

The solvent is not particularly limited, and may be an organic solvent commonly used in the art. If the solvent is effective in dissolving other components, the solvent used in the general yellow curable resin composition may be used without particular limitation, and specifically, ethers, aromatic hydrocarbons, ketones, alcohols, esters or amides, etc. It can be used, more specifically, ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether; diethylene glycol dialkyl ethers such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, and diethylene glycol dibutyl ether; ethylene glycol alkyl ether acetates such as methyl cellosolve acetate and ethyl cellosolve acetate; propylene glycol dialkyl ethers such as propylene glycol monomethyl ether; alkylene glycol alkyl ether acetates such as propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, methoxybutyl acetate, and methoxypentyl acetate; aromatic hydrocarbons such as benzene, toluene, xylene, and mesitylene; ketones such as methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, and cyclohexanone; alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, and glycerin; esters such as ethyl 3-ethoxypropionate and methyl 3-methoxypropionate; cyclic esters such as γ-butyrolactone; and the like. These can be used individually or in mixture of 2 or more types.

The solvent may be included in an amount of 20 to 80 parts by weight, preferably 40 to 65 parts by weight, based on 100 parts by weight of the total amount of the yellow curable resin composition, and in this case, dispersion stability and ease of processing in the manufacturing process, for example, process such as applicability There is an advantage of excellent ease.

additive

The yellow curable resin composition according to the present invention further contains additives such as fillers, other high molecular compounds, surfactants, adhesion promoters, antioxidants, ultraviolet absorbers, and anti-aggregation agents according to the needs of those skilled in the art within the scope not impairing the object of the present invention. can do.

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

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

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

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

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

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

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

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

The additive may be used in an appropriate amount within a range that does not impair the purpose of the present invention, for example, 0.1 to 10 parts by weight, preferably 0.1 to 5 parts by weight, more preferably 0.1 to 3 parts by weight, but may be included in this not limited

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

For example, a yellow colorant is mixed with a solvent in advance and dispersed using a bead mill or the like until the average particle diameter of the colorant is about 0.2 µm or less. At this time, a pigment dispersant is used as needed, and also some or all of alkali-soluble resin may be mix|blended. To the obtained dispersion (hereinafter sometimes referred to as mill base), the remainder of the alkali-soluble resin, a photopolymerizable compound and a photoinitiator, other components used as necessary, and, if necessary, an additional solvent are further added to a predetermined concentration. to obtain the desired yellow curable resin composition.

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

<Color filter>

Another aspect of the present invention is a yellow coating layer comprising a cured product of the aforementioned yellow curable resin composition; and a self-luminous pixel layer formed on the yellow coating layer and containing quantum dots.

The pixel layer of the color filter is a self-luminous pixel layer including quantum dots, and in this case, in order to absorb the blue emission spectrum, the yellow colorant is not mixed and used with the quantum dots in the self-luminous pixel layer, but a separate layer is formed in contact with it. do. That is, the light emitted by the quantum dots emits light of a specific wavelength. In this case, when a yellow colorant is used in the self-emission pixel layer, the self-emission of red, blue, and green colors is not emitted to the outside of the pixel layer. In addition, since the yellow colorant aims to quench the already emitted blue light in red and green, it is preferable to be positioned opposite to the light source. may occur.

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

1 and 2 , the color filter may include, as an example, a substrate 11; a yellow coating layer 13 formed on the substrate 11; and a self-emission pixel layer 15 formed on the yellow coating layer 13 .

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

In another embodiment of the present invention, the yellow coating layer may be formed on the red pixel layer and the green pixel layer.

Specifically, referring to FIG. 2 , the yellow coating layer 13 shows only green in the green pixel layer 15b in which green and blue are mixed, and only red in the red pixel layer 15a in which red and blue are mixed, as a result. Pure green and pure red light can be extracted, improving overall color purity and light efficiency.

The above effect may be affected by the content of the yellow colorant in the yellow coating layer 13 and the thickness of the yellow coating layer.

In another embodiment of the present invention, the yellow coating layer may have a thickness of 1 to 5 μm, and in this case, the desired effect can be maximized, which is preferable.

In the color filter of the present invention, the substrate 11 may be a substrate of the color filter itself, or may be a portion in which the color filter is positioned on a display device, etc., and is not particularly limited. The substrate may be glass, silicon (Si), silicon oxide (SiO _x ), or a polymer substrate, and the polymer substrate may be polyethersulfone (PES) or polycarbonate (PC).

The self-luminous pixel layer 15 is a layer including quantum dots, and is formed by preparing a self-luminous photosensitive resin composition including photoluminescence quantum dots, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator, and a solvent. At this time, the type and content of the alkali-soluble resin, the photopolymerizable compound, the photopolymerization initiator, and the solvent are as described in the above-mentioned yellow curable resin composition.

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

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

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

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

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

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

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

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

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

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

As an example, the color filter may be manufactured by the following method, but is not limited thereto, and the order of each step described below may be changed according to a designer's needs.

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

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

S3) The self-emission pixel layers 15, 15a, and 15b are formed in the pixel area (refer to FIGS. 1 and 2).

In this case, the yellow coating layer is formed only on the red (15a) and green (15b) pixel areas.

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

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

<Image display device>

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

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

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

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

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

In another embodiment of the present invention, in the color filter, the yellow coating layer may be disposed in a direction opposite to the light source (see FIG. 2 ).

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

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

manufacturing example One: CdSe / ZnS core shell structural light luminescence green quantum dots synthesis of particles

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

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

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

Then, ethanol is added to the mixture to precipitate, and quantum dots are separated using a centrifuge, and excess impurities are washed away using chloroform and ethanol, stabilized with oleic acid, the sum of the core particle size and the shell thickness is 3 to 5 nm Green quantum dot particles having a CdSe (core)/ZnS (shell) structure in which phosphorus particles are distributed were obtained.

manufacturing example 2: Alkali-soluble resin

A flask equipped with a stirrer, a thermometer, a reflux cooling tube, a dropping funnel and a nitrogen introduction tube is prepared, while 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 t-butylperoxy-2-ethylhexanoate and 40 parts by weight of propylene glycol monomethyl ether acetate (hereinafter, PGMEA) were added and stirred and mixed to prepare a monomer dropping lot, and 6 parts by weight of n-dodecanethiol , 24 parts by weight of PGMEA was added and mixed with stirring to prepare a chain transfer agent dropping lot. Thereafter, 395 parts by weight of PGMEA was introduced into the flask, the atmosphere in the flask was changed from air to nitrogen, and the temperature of the flask was raised to 90° C. while stirring. Then, the monomer and the chain transfer agent were started dripping from the dropping lot. Dropping proceeds for 2 hours while maintaining 90° C., and after 1 hour, the temperature is raised to 110° C. and maintained for 3 hours. Then, a gas introduction tube is introduced, and a bubble of oxygen/nitrogen = 5/95 (v/v) mixed gas ring started. Then, 10 parts by weight of glycidyl methacrylate, 0.4 parts by weight of 2,2'-methylenebis(4-methyl-6-t-butylphenol), and 0.8 parts by weight of triethylamine were put into the flask, and the flask was heated at 110° C. for 8 hours. The reaction was continued, followed by cooling to room temperature to obtain 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.

manufacturing example 3: self-luminescence Preparation of photosensitive resin composition

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

Composition (unit: wt%) Preparation 3 Quantum dots ^{1 )} 30 Photopolymerizable compound ^{2 )} 30 polymerization initiator ^{3 )} 5 Alkali-soluble resin ^{4 )} 35 1) Quantum dot: Green quantum dot of Preparation Example 1
2) Photopolymerizable compound: dipentaerythritol pentaacrylate (DPHA, Dong-A Synthetic Agent)
3) Polymerization initiator: Irgacure-907 (manufactured by Ciba)
4) Alkali-soluble resin: alkali-soluble resin of Preparation Example 2

Example and comparative example : Preparation of yellow curable resin composition

Yellow curable resin compositions according to Examples and Comparative Examples were prepared according to the configuration and composition (unit: parts by weight) of Table 2 below.

division coloring agent Alkali-soluble resin
(B) photopolymerizable compound
(C) thermosetting agent (D) Photoinitiator (E) solvent
(F) A-1 A-2 A-3 A-4 A-5 D-1 D-2 D-3 Example 1 16 - - - - 12 8 2 - - 2 60 Example 2 - 16 - - - 12 8 2 - - 2 60 Example 3 - - 16 - - 12 8 2 - - 2 60 Example 4 16 - - - - 12 8 8 - - 2 54 Example 5 16 - - - - 12 8 - 2 - 2 60 Example 6 16 - - - - 12 8 - 8 - 2 54 Example 7 16 - - - - 12 8 - - 2 2 60 Example 8 16 - - - - 12 8 - - 8 2 54 Example 9 16 - - - - 12 8 4 4 - 2 54 Example 10 16 - - - - 12 8 4 - 4 2 54 Example 11 16 - - - - 12 8 - 4 4 2 54 Comparative Example 1 14 - - 2 - 12 8 2 - - 2 60 Comparative Example 2 14 - - - 2 12 8 2 - - 2 60 Comparative Example 3 16 - - - - 12 8 1.6 - - 2 60.4 Comparative Example 4 16 - - - - 12 8 10 - - 2 52 Comparative Example 5 16 - - - - 12 8 0 - - 2 62 A-1: CI Pigment Yellow 231
A-2: CI Pigment Yellow 185
A-3: CI Pigment Yellow 138
A-4: CI Pigment Red 254
A-5: CI Pigment Green 7
B: alkali-soluble resin according to Preparation Example 2
C: dipentaerythritol hexaacrylate (KAYARD DHPA; manufactured by Nippon Kayaku Co., Ltd.)
D-1: Resin of Formula 1 (EHPE-3150 Daicel) / Resin of Formula 2 (CEL-2021 Daicel) (Formula 1: Weight ratio of Formula 2 1:1)
D-2: Resin of Formula 3 (ESCN 195XL Sumitomo Kagaku Kogyo Co., Ltd.)
D-3: E-102 Arakawa Chemical Industry Co., Ltd. (silane-modified epoxy resin)
E: Irgacure 907 (manufactured by BASF)
F: propylene glycol monomethyl ether acetate

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

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

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

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

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

λ (nm) T _λ T _(λ-20) T _(λ+20) Example 1 490 55.5 0.3 94.5 Example 2 490 53.1 0.8 90.3 Example 3 490 54.3 0.5 92.1 Example 4 490 55.1 0.32 94.1 Example 5 490 55.3 0.35 94.2 Example 6 490 55.2 0.36 94.1 Example 7 490 55.3 0.34 94.3 Example 8 490 55.2 0.31 94.2 Example 9 490 55.1 0.3 94 Example 10 490 54.9 0.35 94.2 Example 11 490 54.8 0.34 94.3 Comparative Example 1 490 42 2.8 90.2 Comparative Example 2 490 40 0.4 87.5 Comparative Example 3 490 54.6 0.34 93.1 Comparative Example 4 490 53.5 0.38 92 Comparative Example 5 490 53.7 0.39 91.9

manufacturing example 4: Manufacture of color filter

A color filter was prepared as follows by using the self-luminous photosensitive resin composition prepared in Preparation Example 3 and the yellow curable resin composition prepared in Examples and Comparative Examples.

(1) Formation of yellow curable resin layer

A color filter was prepared using the yellow curable resin composition prepared in Examples and Comparative Examples. That is, each of the above yellow curable resin compositions was applied on a glass substrate by spin coating, placed on a heating plate, and maintained at a temperature of 100° C. for 2 minutes to form a thin film.

Then, on the thin film, a test photomask having a pattern for changing the transmittance in a range of 1 to 100% and a line/space pattern of 1 to 50 μm is placed on the thin film, and the distance from the test photomask is set to 50 μm to absorb ultraviolet rays. investigated.

^{At this time, the ultraviolet light source was irradiated with an illuminance of 100 mJ/cm 2} using a 1kW high-pressure mercury lamp containing all of the g, h, and i lines, and no special optical filter was used.

The thin film irradiated with ultraviolet light was developed by immersing it in a developing solution of an aqueous KOH solution having a pH of 10.5 for 2 minutes. The glass plate coated with this thin film was washed with distilled water, dried by blowing nitrogen gas, and heated in a heating oven at 230° C. for 20 minutes to prepare a color filter pattern. The film thickness of the yellow curable resin layer prepared above was 3.0 μm.

(2) Formation of self-luminous pixel layer

Using the self-luminous photosensitive resin composition prepared in Preparation Example 3, in the same manner as in (1), a self-luminous pixel having a thickness of 5 μm on the yellow curable resin layer of each of Examples and Comparative Examples prepared in (1) above layer was formed.

Experimental example 2: Measurement of luminescence intensity

The light-converted area was measured through a 365 nm tube-type 4 W UV irradiator (VL-4LC, VILBER LOURMAT) in a portion formed in a 20 × 20 mm square pattern among the color filters manufactured in Preparation Example 4 above. Specifically, the emission intensity in the 450 nm region was measured using a spectrum meter (Ocean Optics), and the measurement results are shown in Table 4. The higher the measured light emission intensity, the higher the light efficiency.

Experimental example 3: Heat resistance measurement

The color filter prepared in Preparation Example 4 was subjected to a hard bake at 230° C. for 60 minutes to measure the luminous efficiency before and after the hard bake, and check the level at which the luminous efficiency is maintained. was expressed as the optical retention rate.

Experimental example 4: Reflectance measurement

The light reflectance under the light transmission condition of the part formed in a 20 × 20 mm square pattern among the color filters prepared in Preparation Example 4 was measured using a spectrophotometer CM-3600A (Konica Minolta). The lower the measured reflectance, the better the effect of suppressing external light reflection, which means that it is advantageous for high-quality image quality. The measurement results are shown in Table 4.

luminous intensity heat resistance
(mineral retention rate) external light reflectance Example 1 31600 98.9 3.12 Example 2 29800 99.1 3.06 Example 3 30000 99.3 2.96 Example 4 32000 99.0 2.84 Example 5 31700 98.9 2.94 Example 6 31900 99.0 2.83 Example 7 30900 98.9 2.93 Example 8 31300 99.3 2.95 Example 9 31200 99.1 2.89 Example 10 29900 99.0 2.88 Example 11 31250 98.8 2.9 Comparative Example 1 13500 81.0 13 Comparative Example 2 11000 75.3 11.5 Comparative Example 3 29700 73.0 2.89 Comparative Example 4 29800 79.0 2.93 Comparative Example 5 28900 69.7 2.97

Referring to Tables 3 and 4, it can be seen that the examples including the yellow colorant and the thermosetting agent according to the present invention have excellent luminescence intensity, heat resistance, and external light reflectance. It can be seen that in the case of the comparative example which does not include the yellow colorant or the thermosetting agent according to the present invention, the luminous intensity, light retention at high temperature, or external light reflectance is lowered.

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

Claims (12)

yellow coating layer; and a yellow curable resin composition for forming a yellow coating layer on a color filter that is formed on the yellow coating layer and includes a self-luminous pixel layer containing quantum dots,
The yellow curable resin composition,
_{a yellow colorant having a transmittance (T λ} ) of 50 to 60% at a wavelength of 470 nm to 510 nm, and satisfying the transmission characteristics of Equation 1 below; and
At least one thermosetting agent selected from the group consisting of a polyfunctional alicyclic epoxy resin, a silane-modified epoxy resin, and a novolak-type epoxy resin;
The thermosetting agent is included in an amount of 5 to 20 parts by weight based on 100 parts by weight of the total solid content of the yellow curable resin composition,
The polyfunctional alicyclic epoxy resin is to include an alicyclic epoxy resin represented by the following Chemical Formula 1 or 2,
The novolak-type epoxy resin is to include an epoxy resin represented by the following formula (3),
The silane-modified epoxy resin is prepared by a dealcoholization condensation reaction between a hydroxyl group-containing epoxy resin and an alkoxysilane, a yellow curable resin composition:
[Equation 1]
T _(λ-20nm) < 2%
T _(λ+20nm) ≥ 90%
(In Equation 1, T is transmittance (%), and λ means a wavelength of 470 nm to 510 nm)
[Formula 1]

[Formula 2]

(In Formula 1, R is a C1 to C10 alkyl group, and n, m and p are each independently an integer of 1 to 20)
[Formula 3]

(In Formula 3, q is an integer of 1 to 20). delete delete delete According to claim 1,
The hydroxyl group-containing epoxy resin is represented by the following formula (4),
The alkoxysilane is a yellow curable resin composition represented by the following formula (5):
[Formula 4]

[Formula 5]
R1 _y Si(OR2) _4-y
(In Formula 4,
x is an integer from 1 to 34;
In Formula 5,
y is an integer of 0 or 1,
R1 is an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an unsaturated aliphatic residue having 2 to 6 carbon atoms, which may have a functional group directly linked to a carbon atom;
R2 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,
a plurality of R2s are the same as or different from each other). According to claim 1,
The yellow colorant is a yellow curable resin composition comprising at least one pigment selected from the group consisting of CI Pigment Yellow 231, CI Pigment Yellow 185 and CI Pigment Yellow 138. According to claim 1,
The yellow colorant is contained in an amount of 20 to 60 parts by weight based on 100 parts by weight of the total solid content of the yellow curable resin composition. A yellow coating layer comprising a cured product of the yellow curable resin composition according to any one of claims 1 to 7; and
a self-luminous pixel layer formed on the yellow coating layer and containing quantum dots;
A color filter containing 9. The method of claim 8,
The yellow coating layer is a color filter formed on the red pixel layer and the green pixel layer. 9. The method of claim 8,
The yellow coating layer is a color filter having a thickness of 1 to 5㎛. An image display device comprising the color filter according to claim 8 . 12. The method of claim 11,
The color filter is an image display device in which the yellow coating layer is disposed in a direction opposite to the light source.

Images