KR20220099428A - A photosensitive resin composition, a pixel-partition wall one-body structure prepared using the composition, and a display device comprising thereof - Google Patents

Abstract

The present invention relates to a photosensitive resin composition comprising: (A) a colorant containing a white pigment; (B) an alkali-soluble resin; (C) a polymerizable compound; (D) a polymerization initiator; and (E) a solvent, and more specifically, to a photosensitive resin composition for integrally forming at least one pixel part and a barrier rib, a pixel-particle integrated structure prepared using the same, and a display device comprising the same.

Description

A photosensitive resin composition, a pixel-partition integrated structure manufactured using the same, and a display device including the same

The present invention relates to a photosensitive resin composition, a pixel-partition integrated structure manufactured using the same, and a display device including the same.

A display device includes a pixel representing a specific color, and refers to a device that displays a desired color by mixing them.

Such a display device uses various methods to implement color. For example, by passing light emitted from a white backlight unit (BLU) through red, green, and blue color filters, light of a specific wavelength is absorbed and a specific Some wavelengths of light may be transmitted to display a desired color, and liquid crystal is used to drive each pixel, which is represented by a liquid crystal display device. However, when compared with the light emitted from the backlight unit (BLU), the transmitted light transmits using the absorption characteristic of a specific wavelength based on the entire wavelength (generally 380 nm to 780 nm) of white light. Since the transmitted light is used, there is a problem in that the transmitted light has a loss.

In order to solve this problem, recent research on a display using a color conversion panel has been actively conducted. For example, in the case of a display including a blue backlight unit (BLU) and a color conversion panel, blue is the backlight unit (BLU). ) can be used completely, and since red to green is displayed by converting blue to red to green, it can reduce a lot of light compared to the conventional method of expressing a desired color using absorption and transmission. Available.

On the other hand, a color conversion device used in a color conversion panel generally includes a material having a size of a nanometer (nm) level, and since mass production of such material is very difficult, the price is very high.

When a process using such an expensive material is manufactured using a photo process, a large amount of wastewater is generated, and the amount of material actually used compared to the consumed material is small, so there is a problem that it is inefficient.

Accordingly, an inkjet process may be used as a process capable of solving process economics and environmental problems. The inkjet process is advantageous in that the amount of wasted material can be significantly reduced as the nozzle moves and the material is filled at a desired position, which uses expensive materials such as the material included in the color conversion element. case is further maximized.

1 is a schematic diagram showing a manufacturing process of a conventional display device using an inkjet process. Specifically, FIG. 1A is a diagram illustrating a manufacturing process of a color conversion panel included in a conventional display device using an inkjet process, and FIG. 1B is a display device manufactured by combining the color conversion panel manufactured in FIG. 1A and a backlight unit (BLU). It is a diagram showing the process.

Referring to FIG. 1 , a conventional display device includes:

providing a substrate 10; forming a barrier rib 20 on the substrate 10 to separate each pixel 30 and to maintain ink in a constant shape in an inkjet process; An RGB color conversion panel 40 and a backlight unit (BLU) 50 manufactured including forming the red pixel unit 31 , the green pixel unit 32 , and the blue pixel unit 33 by an inkjet process, respectively It may be prepared by combining

In this regard, Korean Patent Laid-Open Publication No. 10-2014-0093512 also discloses a method of manufacturing an organic light emitting display device using an inkjet process.

However, even by such an inkjet process, as pixels of a display device are gradually miniaturized, it is difficult to manufacture a display device having both resolution and light efficiency. In particular, in the case of a display including a blue backlight unit (BLU) and a color conversion panel, in order to match the emission intensity of blue light that does not pass through the color conversion pixel and the red light and green light that pass through the color conversion pixel, each pixel area is should be designed differently.

Accordingly, there is a need for a method capable of simplifying the manufacturing process while having excellent optical properties of the color conversion panel and reducing the rate of defective pixels.

Republic of Korea Patent Publication No. 10-2014-0093512

An object of the present invention is to provide a photosensitive resin composition for improving process economics of a color conversion panel.

Moreover, an object of this invention is to provide the photosensitive resin composition for improving the resolution and light efficiency of a color conversion panel.

Another object of the present invention is to provide a photosensitive resin composition capable of reducing the incidence of defective pixels in a color conversion panel.

In addition, an object of the present invention is to provide a pixel-partition integrated structure manufactured by using the photosensitive resin composition.

Another object of the present invention is to provide a display device including the pixel-partition integrated structure.

The present invention is a photosensitive resin composition comprising a colorant (A) containing a white pigment, an alkali-soluble resin (B), a polymerizable compound (C), a polymerization initiator (D) and a solvent (E), wherein at least one pixel or more It relates to the photosensitive resin composition for integrally forming a part and a partition.

In the present invention, in the first aspect, the average particle diameter of the white pigment may be 150 to 300 nm.

In the present invention, in the second aspect, the white pigment may include titanium oxide (TiO ₂ ).

The present invention, in its third aspect, the titanium oxide (TiO ₂ ) The surface of the silicon oxide (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ), zirconium oxide (ZrO ₂ ) and organic material from the group consisting of It may be surface-treated with one or more selected types.

According to the fourth aspect of the present invention, the colorant (A) may further include a blue pigment.

In the present invention, in the fifth aspect, the content of the white pigment may be three times or more of the content of the blue pigment.

In the present invention, in the sixth aspect, the cured film prepared from the photosensitive resin composition may have a transmittance of 30% or more at a wavelength of 450 nm when the cured film has a thickness of 7 µm to 15 µm.

In the present invention, in the seventh aspect, the cured film made of the photosensitive resin composition may have a transmittance greater than a reflectance at a wavelength of 450 nm when the thickness is 7 µm to 15 µm.

In the eighth aspect of the present invention, the photosensitive resin composition may be for integrally forming a pixel portion and a partition wall of a color conversion panel using a blue light source.

The present invention, in the ninth aspect, with respect to the total weight of the solid content in the photosensitive resin composition, the colorant (A) 0.5 to 30% by weight; 20 to 70% by weight of alkali-soluble resin (B); 5 to 50% by weight of a polymerizable compound (C); 0.01 to 10 wt% of a polymerization initiator (D); And with respect to the total weight of the photosensitive resin composition, the solvent (E) may include 60 to 90% by weight.

In the tenth aspect, the present invention may further include one or more selected from the group consisting of fillers, polymer compounds, curing agents, surfactants, pigment dispersants, adhesion promoters, antioxidants, ultraviolet absorbers, and anti-aggregation agents. have.

In addition, the present invention relates to a pixel-partition integrated structure made of the photosensitive resin composition and a display device including the same.

ADVANTAGE OF THE INVENTION According to the photosensitive resin composition of this invention, a partition and a pixel can be integrally formed, and it is possible to improve process economical efficiency while ensuring high resolution and light efficiency. Specifically, when the photosensitive resin composition of the present invention is used to manufacture a pixel-partition integrated structure, at least one pixel is manufactured together during the manufacture of the barrier rib, so that the amount of ink used in the inkjet process can be reduced.

In addition, according to the photosensitive resin composition of the present invention, it is possible to reduce the rate of occurrence of defective pixels in the color conversion panel. Specifically, as pixels are miniaturized, a pixel portion, for example, a blue pixel portion, which is not easily manufactured by the inkjet process, is integrally formed with the barrier rib, thereby overcoming the inefficiency of manufacturing by the inkjet process.

1 is a schematic diagram showing a manufacturing process of a conventional display device using an inkjet process.
2 is a schematic diagram illustrating a manufacturing process of a display device according to an exemplary embodiment.
3 is an image showing an inkjet defective pixel (left) and a good pixel (right) of the color conversion panel.

The present invention relates to a photosensitive resin composition for integrally forming at least one pixel unit and a barrier rib, a pixel-partition integrated structure manufactured using the photosensitive resin composition, and a display device including the same.

More specifically, the present invention relates to a photosensitive resin composition comprising a colorant (A) containing a white pigment, an alkali-soluble resin (B), a polymerizable compound (C), a polymerization initiator (D) and a solvent (E). , characterized in that at least one pixel unit and the partition wall are integrally formed.

By allowing the pixel portion and the partition wall to be integrally formed as described above, the fine pixel portion, particularly the blue pixel portion of the color conversion panel using the blue backlight unit (BLU), is integrally formed with the partition wall to achieve high resolution and light efficiency. It makes it possible to manufacture a color conversion panel with improved process economics while showing.

"Solid content" as described in this invention means the remaining component except a solvent.

Hereinafter, the content of the present invention will be divided into <photosensitive resin composition> and <pixel-partition integrated structure, display device including the same, and manufacturing method thereof> .

<Photosensitive resin composition>

The photosensitive resin composition for integrally forming the pixel portion and the partition wall according to the present invention comprises a colorant (A) containing a white pigment, an alkali-soluble resin (B), a polymerizable compound (C), a polymerization initiator (D) and a solvent (E) may be included.

The photosensitive resin composition for integrally forming the pixel portion and the partition wall according to the present invention may be for integrally forming the blue pixel portion and the partition wall. In this case, when the cured film made of the photosensitive resin composition has a thickness of 7 μm to 15 μm, the transmittance at a wavelength of 450 nm, that is, a blue wavelength, is preferably greater than 30% or more, which is greater than the reflectance at red and green wavelengths. transmittance is not particularly limited.

The photosensitive resin composition according to the present invention may be characterized in that it is for integrally forming a pixel portion and a partition wall of a color conversion panel using a blue light source.

Colorant (A)

The colorant included in the photosensitive resin composition according to the present invention may include a white pigment.

The white pigment is for the reflective properties of the pixel-barrier-integrated structure, and specifically, by improving the reflectance of the pixel-barrier-integrated structure to reflect the light generated from the color conversion element toward the barrier rib, the luminance is increased. can be improved

It is preferable that the average particle diameter of the white pigment is 150 nm to 300 nm, and when the average particle diameter is less than 150 nm, there is a problem in that the reflection characteristics are weakened in the visible ray region of 380 nm to 780 nm, and the average particle diameter is 300 nm If it exceeds, dispersibility and storage stability are deteriorated.

In the present invention, the "average particle diameter" may be a number average particle diameter, for example, it can be obtained from an image observed by a field emission principal electron microscope (FE-SEM) or a transmission electron microscope (TEM). Specifically, it is possible to obtain a value obtained by extracting several samples from an observation image of FE-SEM or TEM, measuring the diameters of these samples, and arithmetic average.

As the white pigment, a pigment known in the art may be used when the above conditions are satisfied. In one or more embodiments, C.I. Pigment White 4, 5, 6, 6:1, 7, 18, 18:1, 19, 20, 22, 25, 26, 27, 28, 32, etc. may be used, and in terms of reflection efficiency and whiteness, C.I. Pigment White 6 or 22 is preferred, and C.I. Pigment White 6 is more preferred.

These can be used individually or in mixture of 2 or more types.

Titanium oxide (TiO ₂ ) contained in CI Pigment White 6 can be used as an effective white colorant because of its low price and high refractive index and excellent reflectivity, and in terms of whiteness, it is preferable to have a rutile structure.

The white pigment, titanium oxide (TiO ₂ ) is, if necessary, resin treatment, surface treatment using a pigment derivative introduced with acidic or basic groups, graft treatment on the pigment surface with a polymer compound, etc., sulfuric acid atomization method, etc. It may be one that has been subjected to atomization treatment or cleaning treatment with an organic solvent or water to remove impurities, or ionic impurity removal treatment by an ion exchange method or the like.

The titanium oxide (TiO ₂ ) is a surface-treated one or more selected from the group consisting of silicon oxide (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ), zirconium oxide (ZrO ₂ ) and organic materials. may, preferably, silicon oxide (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ) and zirconium oxide (ZrO ₂ ) sequentially surface-treated may be used, and more preferably, the surface-treated oxide Titanium (TiO ₂ ) A surface treatment of the outermost surface of the organic material may be used. As the organic material, by coating titanium oxide (TiO ₂ ) with a single molecular layer of low polarity and surface treatment, the energy required for dispersion of titanium oxide (TiO ₂ ) is lowered, and titanium oxide (TiO ₂ ) is compressed and aggregated. It is not particularly limited as long as it is to prevent it, and in one or a plurality of embodiments, stearic acid, trimethylpropane (TMP), pentaerythritol, and the like may be used.

By surface treatment of titanium oxide (TiO ₂ ) as described above, it is possible to improve the reflective luminance characteristics while lowering the photocatalytic activity of titanium oxide (TiO ₂ ). In particular, according to a preferred embodiment of the surface treatment, heat resistance and chemical resistance There is an advantage in terms of improved reliability, such as. The surface treatment may be a treatment by encapsulation.

The content of the titanium oxide (TiO ₂ ) core included in the surface-treated titanium oxide (TiO ₂ ) is preferably 85 to 95 wt%, based on the total weight of the surface-treated titanium oxide (TiO ₂ ). When the surface of the titanium oxide (TiO ₂ ) core is treated within the above range, it exhibits excellent whiteness and excellent reflection luminance.

Commercial products of the titanium oxide (TiO ₂ ) include "R-101", "R-102", "R-103", "R-104", "R-105", "R- 350”, “R-706”, “R-794”, “R-796”, “TS-6200”, “R-900”, “R-902”, “R-902+”, “R-906” ”, “R-931”, “R-960”, “R-6200”, Huntman’s “R-FC5”, “TR81”, “TR88” and ISK’s “CR-57” ' and the like may be used.

The colorant of the present invention may further include a blue pigment.

The blue pigment is for the transmission characteristics of the pixel-partition integrated structure, and specifically, improves the transmittance of the blue light of the pixel-partition integrated structure, so that the light generated from the blue backlight unit (BLU) in the user's viewing direction. By transmitting the directed light, the luminance can be improved.

As the blue pigment, a pigment known in the art may be used when the above conditions are satisfied. In one or more embodiments, C.I. Pigment Blue 15, 15:3, 15:4, 15:6, 60, etc. can be used, and in terms of transmission efficiency and luminance, C.I. Pigment Blue 15:6 is preferred.

These can be used individually or in mixture of 2 or more types.

When the colorant of the present invention further comprises a blue pigment, the white pigment content may be 3 times or more of the blue pigment content, preferably 3 to 10 times, and more preferably, 3 to 5 times the content of the blue pigment. .

When the content of the white pigment with respect to the blue pigment satisfies the above range, there may be advantages in terms of improvement in transmittance for blue light and improvement in reflectivity for green light and red light.

The content of the colorant may be 0.5 to 30 wt%, preferably 0.5 to 20 wt%, based on the total weight of the solid content of the photosensitive resin composition.

When the content of the colorant satisfies the above range, light transmission characteristics and reflection characteristics are improved, thereby enabling high-quality image reproduction.

The colorant of the present invention may further include other dyes or pigments in addition to the above-described white and blue pigments. Dyes or pigments that may be further included are not particularly limited, and conventionally or subsequently developed dyes or pigments may be used within a range that does not impair the purpose of the present invention.

Meanwhile, as the pigment, a pigment dispersion in which the particle diameter of the pigment is uniformly dispersed may be used. Examples of the method for uniformly dispersing the particle diameter of the pigment include a method of dispersing treatment by containing a pigment dispersant, and according to the method, a pigment dispersion in a state in which the pigment is uniformly dispersed in a solution can be obtained.

The pigment dispersant is added to deagglomerate and maintain stability of the pigment, and may be used without limitation in the art, and specific examples of the pigment dispersant include cationic, anionic, nonionic, amphoteric, Surfactants, such as polyester type and polyamine type, etc. are mentioned, These can be used individually or in combination of 2 or more types, respectively.

In addition, the pigment dispersant preferably includes an acrylate-based dispersant including butyl methacrylate (BMA) or N,N-dimethylaminoethyl methacrylate (DMAEMA), and other resin types in addition to the acrylate-based dispersant. of pigment dispersant can also be used. The resin-type pigment dispersant may be used alone or in combination of two or more, or may be used in combination with the acrylate-based dispersant.

Alkali-soluble resin (B)

The alkali-soluble resin has reactivity and alkali solubility under the action of light or heat, acts as a dispersion medium of the solid contained in the photosensitive resin composition, and if it performs the function of a binder resin, a resin known in the art is selected without particular limitation can be used by

Specifically, the alkali-soluble resin is preferably a copolymer of an unsaturated carboxyl group-containing monomer and another monomer copolymerizable therewith.

As said unsaturated carboxyl group containing monomer, the unsaturated carboxylic acid etc. which have one or more carboxyl groups in a molecule|numerator, such as an unsaturated monocarboxylic acid, unsaturated dicarboxylic acid, and an unsaturated polyhydric carboxylic acid, are mentioned, for example.

Examples of the unsaturated monocarboxylic acid include acrylic acid, methacrylic acid, crotonic acid, α-chloroacrylic acid, and cinnamic acid.

As said unsaturated dicarboxylic acid, maleic acid, a fumaric acid, itaconic acid, a citraconic acid, mesaconic acid etc. are mentioned, for example.

The unsaturated polyhydric carboxylic acid may be an acid anhydride, and specific examples thereof include maleic anhydride, itaconic anhydride, and citraconic anhydride. In addition, the said unsaturated polyhydric carboxylic acid may be its mono(2-methacryloyloxyalkyl) ester, For example, succinic acid mono(2-acryloyloxyethyl), succinic acid mono(2-methacryloyloxyethyl) ), monophthalate (2-acryloyloxyethyl), monophthalate (2-methacryloyloxyethyl), and the like. The unsaturated polyhydric carboxylic acid may be a mono(meth)acrylate of a dicarboxy polymer at both terminals, for example, ω-carboxypolycaprolactone monoacrylate, ω-carboxypolycaprolactone monomethacrylate, etc. .

The unsaturated carboxyl group-containing monomers may be used alone or in combination of two or more.

Examples of the other monomer copolymerizable with the unsaturated carboxyl group-containing monomer include styrene, α-methylstyrene, o-vinyltoluene, m-vinyltoluene, p-vinyltoluene, p-chlorostyrene, o-methoxystyrene, m- Methoxystyrene, p-methoxystyrene, o-vinylbenzylmethyl ether, m-vinylbenzylmethylether, p-vinylbenzylmethylether, o-vinylbenzylglycidylether, m-vinylbenzylglycidylether, p -Aromatic vinyl compounds, such as vinylbenzyl glycidyl ether and indene; Methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, i-propyl acrylate, i-propyl methacrylate, n-butyl acrylate, n-butyl methacrylate, i-butyl acrylate, i-butyl methacrylate, sec-butyl acrylate, sec-butyl methacrylate, t-butyl acrylate, t-butyl methacrylate, 2-hydroxy Ethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 3-hydroxypropyl acrylate, 3-hydroxypropyl methacrylate, 2-hydroxy Oxybutyl acrylate, 2-hydroxybutyl methacrylate, 3-hydroxybutyl acrylate, 3-hydroxybutyl methacrylate, 4-hydroxybutyl acrylate, 4-hydroxybutyl methacrylate, allyl acryl Rate, allyl methacrylate, benzyl acrylate, benzyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, phenyl acrylate, phenyl methacrylate, 2-methoxyethyl acrylate, 2-methoxyethyl methacrylate acrylate, 2-phenoxyethyl acrylate, 2-phenoxyethyl methacrylate, methoxydiethylene glycol acrylate, methoxydiethylene glycol methacrylate, methoxytriethylene glycol acrylate, methoxytriethylene glycol methacrylic Rate, methoxypropylene glycol acrylate, methoxypropylene glycol methacrylate, methoxy dipropylene glycol acrylate, methoxy dipropylene glycol methacrylate, isobornyl acrylate, isobornyl methacrylate, dicyclopentadie Nyl acrylate, dicyclopentadiethyl methacrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-hydroxy-3-phenoxypropyl methacrylate, glycerol monoacrylate, glycerol monomethacrylate unsaturated carboxylic acid esters such as; 2-aminoethyl acrylate, 2-aminoethyl methacrylate, 2-dimethylaminoethyl acrylate, 2-dimethylaminoethyl methacrylate, 2-aminopropyl acrylate, 2-aminopropyl methacrylate, 2-dimethyl Unsaturated carboxyl such as aminopropyl acrylate, 2-dimethylaminopropyl methacrylate, 3-aminopropyl acrylate, 3-aminopropyl methacrylate, 3-dimethylaminopropyl acrylate, and 3-dimethylaminopropyl methacrylate acid aminoalkyl esters; unsaturated carboxylic acid glycidyl esters such as glycidyl acrylate and glycidyl methacrylate; Carboxylic acid vinyl esters, such as vinyl acetate, a vinyl propionate, a vinyl butyrate, and a vinyl benzoate; unsaturated ethers such as vinyl methyl ether, vinyl ethyl ether, and allyl glycidyl ether; vinyl cyanide compounds such as acrylonitrile, methacrylonitrile, α-chloroacrylonitrile and vinylidene cyanide; unsaturated amides such as acrylamide, methacrylamide, α-chloroacrylamide, N-2-hydroxyethylacrylamide, and N-2-hydroxyethylmethacrylamide; unsaturated imides such as maleimide, N-benzylmaleimide, N-phenylmaleimide, and N-cyclohexylmaleimide; aliphatic conjugated dienes such as 1,3-butadiene, isoprene and chloroprene; and a monoacryloyl group or monomethacryloyl group at the end of the polymer molecular chain of polystyrene, polymethyl acrylate, polymethyl methacrylate, poly-n-butyl acrylate, poly-n-butyl methacrylate, and polysiloxane. macromonomers and the like. These monomers can be used individually or in mixture of 2 or more types, respectively.

The content of the alkali-soluble resin may be included in an amount of 20 to 70% by weight, preferably 30 to 60% by weight, based on the total weight of the solid content in the photosensitive resin composition. When the alkali-soluble resin is contained within the above range, it is preferable because the solubility in the developer is sufficient to facilitate the formation of a cured film, and the film reduction of the pixel portion of the exposed portion is prevented during development, so that the omission property of the unexposed portion is improved. .

The alkali-soluble resin preferably has an acid value of 30 mg·KOH/g to 150 mg·KOH/g, and thus, the temporal stability of the photosensitive resin composition can be improved. When the acid value of the alkali-soluble resin is less than 30 mg·KOH/g, it is difficult for the photosensitive resin composition to secure a sufficient development rate, and when it exceeds 150 mg·KOH/g, the adhesion with the substrate is reduced and the pattern is short-circuited. It is easy to occur, and the stability over time of the photosensitive resin composition may be lowered and the viscosity may increase.

polymerizable compound (C)

The polymerizable compound is a compound that can be polymerized by light and heat, and as long as it can be polymerized by light and heat, a polymerizable compound known in the art can be selected and used without particular limitation, and specifically, a monofunctional monomer, A bifunctional monomer, another polyfunctional monomer, etc. can be used.

The type of the monofunctional monomer is not particularly limited, and for example, nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, and 2-hydroxyethyl acryl rate, N-vinylpyrrolidone, and the like.

The type of the bifunctional monomer is not particularly limited, and for example, 1,6-hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, triethylene Glycol di(meth)acrylate, bis(acryloyloxyethyl)ether of bisphenol A, 3-methylpentanediol di(meth)acrylate, etc. are mentioned.

The type of the polyfunctional monomer is not particularly limited, and for example, trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth) ) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, ethoxylated dipentaerythritol hexa (meth)acrylate, propoxylated dipentaerythritol hexa(meth)acrylate, dipentaerythritol hexa(meth)acrylate, etc. are mentioned.

Commercially available examples of the polymerizable compound include, but are not limited to, Miramer M600 manufactured by Miwon Corporation.

The content of the polymerizable compound may be included in an amount of 5 to 50 wt%, preferably 10 to 45 wt%, based on the total weight of the solid content in the photosensitive resin composition. When the polymerizable compound is included within the above range, it is preferable in terms of strength or smoothness of the pixel portion.

polymerization initiator (D)

As the polymerization initiator, a photopolymerization initiator known in the art may be selected and used without particular limitation. For example, acetophenone-based, benzophenone-based, triazine-based, thioxanthone-based, oxime-based, benzoin-based, biimidazole-based compounds and the like may be used.

For example, as the oxime-based compound, o-ethoxycarbonyl-α-oxyimino-1-phenylpropan-1-one may be used, and commercial products include OXE-01 and OXE-02 manufactured by Ciba Corporation. , but is not limited thereto.

The photopolymerization initiator may be used alone or in combination of two or more.

The content of the photopolymerization initiator may be 0.01 to 10 wt%, preferably 0.01 to 5 wt%, based on the total weight of the solid content in the photosensitive resin composition. When the photopolymerization initiator is included within the above range, it is preferable because the photopolymerization reaction rate is appropriate to prevent an increase in the overall process time and to prevent deterioration of the physical properties of the final cured film due to overreaction.

The photosensitive resin composition according to the present invention may further include a photopolymerization initiator auxiliary in addition to the photopolymerization initiator. When a photopolymerization initiation auxiliary is used together with the photopolymerization initiator, the photosensitive resin composition becomes more sensitive and productivity is improved.

The photopolymerization initiation adjuvant is a compound used to promote polymerization of a polymerizable compound whose polymerization is initiated by the photopolymerization initiator, and at least one compound selected from the group consisting of amines and carboxylic acid compounds may be preferably used.

When the photopolymerization initiator is included, the content thereof may be generally greater than 0 mol to 10 mol or less, preferably 0.01 mol to 5 mol, based on 1 mol of the photopolymerization initiator. When the photopolymerization initiation adjuvant is included within the above range, it is preferable because the productivity improvement effect can be expected by improving the photopolymerization efficiency.

Solvent (E)

As the solvent, an organic solvent known in the art may be used without particular limitation.

Specific examples of the solvent include ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl Diethylene glycol dialkyl ethers such as ether, diethylene glycol dipropyl ether and diethylene glycol dibutyl ether, ethylene glycol alkyl ether acetates such as methyl cellosolve acetate and ethyl cellosolve acetate, propylene glycol monomethyl ether Alkylene glycol alkyl ether acetates such as 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, methyl Ketones such as ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, cyclohexanone, alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, glycerin, ethyl 3-ethoxypropionate, Esters, such as methyl 3-methoxypropionate, and cyclic esters, such as (gamma)-butyrolactone, etc. are mentioned.

The solvent may use an organic solvent having a boiling point of preferably 100 ° C. to 200 ° C. in terms of applicability and dryness, more preferably alkylene glycol alkyl ether acetates, ketones, 3-ethoxypropionate ethyl, 3 -Esters such as methyl methoxypropionate can be used, and more preferably, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, cyclohexanone, 3-ethoxy ethyl propionate, 3-methoxy methyl propionate, etc. can be used

Each of the above solvents may be used alone or in combination of two or more types.

The content of the solvent may be included in an amount of 60 to 90% by weight, preferably 70 to 85% by weight, based on the total weight of the photosensitive resin composition. When the solvent is contained within the above content range, the effect of improving the applicability when applied with an application device such as a roll coater, spin coater, slit and spin coater, slit coater (sometimes referred to as a die coater), inkjet, etc. It is preferable to provide

Additive (F)

The photosensitive resin composition according to the present invention may further include an additive as necessary, and the type of the additive may be determined according to the needs of the user and is not particularly limited in the present invention, but for example, a filler, other A high molecular compound, a hardening|curing agent, surfactant, an adhesion promoter, antioxidant, a ultraviolet absorber, aggregation inhibitor, a dispersing agent, an ink repellent agent, etc. are mentioned. The additives exemplified above may be used alone or in combination of two or more.

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

The antioxidant may include, for example, at least one selected from the group consisting of phosphorus-based antioxidants, sulfur-based antioxidants, and phenol-based antioxidants, and in this case, color change that may occur at high temperatures during the process or a light source after display manufacturing It can inhibit the occurrence of yellowing that can be caused by The antioxidant may include at least one selected from the group consisting of a phenolic compound, a phosphorus compound, and a sulfur compound, which are a phenolic-phosphorus compound, a phenolic-sulfur compound, a phosphorus-sulfur compound, or a phenolic-phosphorus compound. -Can be used in combination with sulfur compounds.

The content of the antioxidant may be included in an amount of 0.1 to 30% by weight, preferably 0.5 to 20% by weight, based on the total weight of the solid content in the photosensitive resin composition. When the antioxidant is included within the above range, it is preferable in terms of solving the problem of lowering the luminescence intensity.

The dispersing agent is added to maintain dispersion stability of the pigment, and those generally used in the art may be used without limitation.

The said ink repellent agent has a fluorine atom in a molecule|numerator. Thereby, an ink repellent agent has the property (top surface migration property) and ink repellency which migrates to an upper surface in the process of forming a cured film using the photosensitive resin composition containing this. By using an ink repellent agent, the upper layer part including the upper surface of the cured film obtained becomes a layer (henceforth an "ink repellent layer" may be called) in which an ink repellent agent exists densely, and ink repellency on the cured film upper surface is granted In addition, from the viewpoint of improving the fixability of the ink repellent agent to the ink repellent layer, the ink repellent agent is preferably a compound having an ethylenic double bond. When the ink repellent agent has an ethylenic double bond, radicals act on the ethylenic double bond of the ink repellent agent transferred to the upper surface, and the ethylenic double contained in the ink repellent agent or the ink repellent agent and the photosensitive resin composition for partition formation Crosslinking by (co)polymerization with another component having a bond becomes possible.

The kind of the said ink repellent agent is not specifically limited, For example, the partial hydrolysis-condensation product of a hydrolysable silane compound is mentioned. A hydrolysable silane compound may be used individually by 1 type, and may use 2 or more types together. An ink repellent agent consisting of a partial hydrolysis-condensation product of a hydrolyzable silane compound and having a fluorine atom can be used, and an ink repellent agent comprising a compound having a hydrocarbon chain in the main chain and a fluorine atom in the side chain is used. also be

The ink repellent agent may be included in an amount of 0.01 to 7 wt%, preferably 0.1 to 5 wt%, based on the total weight (solid content) of the photosensitive resin composition for the colored barrier ribs, and when included within the above range, a preferable advantage in terms of ink repellency There is this.

When the ink repellent agent is included in less than the above range, the liquid repellency of the coating film may be lowered, and when the ink repellent agent is included in excess of the above range, the profile of the ink may change due to surface tension, so the above range It is preferred to be incorporated into

In the case of additives whose content is not exemplified among the above additives, those skilled in the art may appropriately add and use the additives within a range that does not impair the effects of the present invention. For example, the additive may be used in an amount of 0.05 to 10 wt%, preferably 0.1 to 10 wt%, more preferably 0.1 to 5 wt%, based on the total weight of the photosensitive resin composition, but is not limited thereto.

The photosensitive resin composition of the present invention may be prepared by a conventional method known in the art, and is not particularly limited in the present invention, but may be prepared, for example, by the following method.

The colorant and/or the scattering particles are mixed with a solvent in advance and dispersed using a bead mill or the like until the colorant has an average particle diameter of 30 to 300 nm. At this time, a dispersing agent may be additionally used if necessary, and some or all of the alkali-soluble resin may be blended. To the obtained dispersion (hereinafter sometimes referred to as mill base), the remainder of the alkali-soluble resin, a polymerizable compound and a photopolymerization initiator, additional additives as necessary, and additional solvents as necessary are further added to a predetermined concentration, The target photosensitive resin composition can be obtained.

<Pixel-barrier integrated structure, display device including same, and manufacturing method thereof>

The present invention provides a pixel-partition integrated structure made of the photosensitive resin composition, a display device including the same, and a method of manufacturing the same.

In a display device including a color conversion panel, since each pixel is driven to form a color, a barrier rib structure capable of distinguishing each pixel from each other is required.

The pixel-partition integrated structure is a structure manufactured by the photosensitive resin composition of the present invention, and at least one or more pixels and the barrier rib are each independently manufactured through a separate process, but may be manufactured from the same composition. . For example, the blue pixel unit and the barrier rib may be integrally manufactured by the same single process procedure.

The pixel-barrier integrated structure manufactured by the photosensitive resin composition of the present invention and the display device including the same may partially omit the inkjet process, thereby improving process economics.

In an embodiment, the pixel unit integrally formed with the barrier rib may be a blue pixel unit. In this case, since the formed pixel-partition integrated structure has excellent transmittance for blue light and good reflectance for red and green light, it is possible to manufacture an image display device having high resolution and light efficiency. In addition, in order to express various colors, the area of the pixel unit can be designed to have various sizes, and when the pixel unit integrally formed with the partition wall is a blue pixel unit, there is an advantage that blue can be formed with the smallest pixel size.

The display device may include a liquid crystal display device, an organic light emitting diode, a flexible display, and the like, but is not limited thereto, and all display devices known in this field that can be applied may be exemplified.

2 is a schematic diagram illustrating a manufacturing process of a display device according to an exemplary embodiment. Specifically, FIG. 2A is a diagram illustrating a manufacturing process of a color conversion panel according to an embodiment of the present invention, and FIG. 2B is a diagram illustrating a manufacturing process of a display device according to an embodiment of the present invention.

Referring to Figure 2a, a color conversion panel 400 according to an embodiment of the present invention,

providing a substrate 100; forming a barrier rib 210 and a pixel-block integrated structure 220 and 330 on the substrate 100; It may be manufactured including; forming the red pixel unit 310 and the green pixel unit 320 by an inkjet process.

In FIG. 2A , the pixel unit 300 included in the color conversion panel 400 includes a red pixel unit 310 and a green pixel unit 320 manufactured by an inkjet process, and a blue pixel formed integrally with the partition wall. Including the parts 220 and 330 is shown as an example, but is not necessarily limited thereto.

The forming of the barrier ribs 210 and the pixel-block integrated structures 220 and 330 on the substrate 100 may include applying a photosensitive resin composition on the substrate; exposure process; and a developing process.

First, the photosensitive resin composition of the present invention is applied on the substrate 100 and then dried by heating to remove volatile components such as a solvent to form a smooth coating film.

As a coating method, it can carry out, for example by the spin coating method, the cast coating method, the roll coating method, the slit-and-spin coating method, or the slit coating method. After application, heat drying (pre-baking) or drying under reduced pressure is performed to volatilize volatile components such as solvents. Here, the heating temperature is usually 70 to 150°C, preferably 80 to 130°C. The thickness of the coating film after heat drying is usually about 7 to 15 µm. Thus, the obtained coating film is irradiated with an ultraviolet-ray through the mask for forming the target pattern. At this time, it is preferable to use a device such as a mask aligner or a stepper so that parallel rays are uniformly irradiated to the entire exposed portion and the mask and the substrate are precisely aligned.

The mask pattern may include a first pattern for integrally forming the pixel portion and the barrier rib and a second pattern for forming only the barrier rib. For example, the first pattern may be a pattern in which an area of a pixel unit to be integrally formed with the partition wall and an area where an adjacent partition wall is to be formed are integrally formed.

Thereafter, when ultraviolet rays are irradiated, radicals are formed by the photopolymerization initiator at the irradiated portion of the ultraviolet rays, and photocuring is performed by reacting with the polymerizable compound.

As the ultraviolet rays, g-line (wavelength: 436 nm), h-ray, i-line (wavelength: 365 nm), etc. may be used. The irradiation amount of ultraviolet rays may be appropriately selected according to need, and the present invention is not limited thereto. When the photocured coating film is brought into contact with a developer to dissolve the non-exposed portion and developed, a pattern shape including the barrier rib 210 and the structures 220 and 330 in which the pixel unit and the barrier rib are integrally formed can be obtained.

The pattern shape thus obtained can be made hard through a post-curing process, and the heating temperature is usually 150 to 250°C, preferably 180 to 230°C. The heating time is usually 5 to 30 minutes, preferably 15 to 20 minutes.

The step of forming the red pixel unit 310 and the green pixel unit 320 may be performed including an inkjet process.

Specifically, the red pixel part 310 is formed between two adjacent partition walls 210 through an inkjet process in a pixel part region provided in a pattern other than the blue pixel parts 220 and 330 formed integrally with the partition wall through an inkjet process. ) and the green pixel unit 320 may be formed.

Thereafter, referring to FIG. 2B , a display device may be manufactured by combining the color conversion panel 400 manufactured in FIG. 2A and the blue backlight unit (BLU) 500 .

In some embodiments, the display device of the present invention may be manufactured by directly forming the pixel-partition integrated structure on the upper surface of the backlight.

Hereinafter, the present invention will be described in more detail based on Examples, but the embodiments of the present invention disclosed below are merely illustrative and the scope of the present invention is not limited to these embodiments. The scope of the present invention is indicated in the claims, and furthermore includes all modifications within the meaning and scope equivalent to those recorded in the claims. In addition, in the following examples and comparative examples, "%" and "part" indicating the content are based on mass unless otherwise specified.

<Synthesis Example 1: Synthesis of alkali-soluble resin (B-1)>

A flask equipped with a stirrer, a thermometer, a reflux cooling tube, a dropping funnel and a nitrogen introduction tube is prepared, while 15 parts by weight of N-benzylmaleimide, 30 parts by weight of acrylic acid, 50 parts by weight of cyclohexyl methacrylate, and methyl methacrylic 5 parts by weight of the rate, 4 parts by weight of t-butyl peroxy-2-ethylhexanoate, and 40 parts by weight of propylene glycol monomethyl ether acetate (hereinafter also referred to as PGMEA) were added and stirred and mixed to prepare a monomer dropping lot, n -A chain transfer agent dropping lot was prepared by adding 6 parts by weight of dodecanediol and 24 parts by weight of PGMEA and mixing with stirring.

Thereafter, 395 parts by weight of PGMEA was introduced into the flask, the atmosphere in the flask was substituted 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 was carried out for 2 hours while maintaining 90 ° C. After 1 hour, the temperature was raised to 110 ° C. and maintained for 3 hours. Bubbling was started.

Then, 20 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 6 hours. The reaction was continued, and thereafter, while cooling to room temperature, alkali-soluble resin having a weight average molecular weight of 3,800 and an acid value based on solid content of 83 mgKOH/g was obtained.

The weight average molecular weight (Mw) of the alkali-soluble resin was measured by GPC method, and HLC-8120GPC (manufactured by Tosoh Corporation) was used.

Measurement conditions were used by connecting TSK-GELG4000HXL and TSK-GELG2000HXL columns in series, and the temperature of the column was set to 40 °C. Tetrahydrofuran was used as a mobile phase solvent, and it was measured while flowing at a flow rate of 1.0 mL/min. The concentration of the measurement sample was 0.6% by weight, and the injection amount was 50 μl, and it was analyzed using an RI detector. TSK STANDARD POLYSTYRENE F-40, F-4, F-1, A-2500, A-500 (manufactured by Toso Co., Ltd.) was used as a standard material for calibration, and the weight average molecular weight of the alkali-soluble resin obtained under the above conditions was measured. did.

<Synthesis Example 2: Synthesis of alkali-soluble resin (B-2)>

257.3 g of diethylene glycol methyl ethyl ether was placed in a flask equipped with a stirrer, a thermometer, a dropping funnel, a reflux cooling tube, and a nitrogen introduction tube, followed by stirring while replacing with nitrogen, and the temperature was raised to 78°C. Next, 110.0 g of dicyclofentanyl methacrylate, 17.0 g of glycidyl methacrylate, 28.4 g of methacrylic acid and 12.1 g of malonic acid-2-[[[2-methyl-1-oxo-2] -propenyl]oxy]ethyl]amino]carbonyl]-1,3-diethyl ester (dissociation rate of block isocyanato group: 85% by weight) and 13.4 g of 2,2'-azobis (2,4-dimethylvaleronitrile) (polymerization initiator) was added to and dissolved in 78.7 g of diethylene glycol methyl ethyl ether, and what was dissolved was added dropwise to the flask from the dropping funnel, respectively. After completion|finish of dripping, it copolymerized by stirring at 78 degreeC for 3 hours, the copolymer was produced|generated, and alkali-soluble resin (component concentration other than a solvent 40 weight%) was obtained. The weight average molecular weight (Mw) of the obtained alkali-soluble resin was 8,500, and the acid value was 103.0 mgKOH/g.

<Synthesis Example 3: Synthesis of alkali-soluble resin (B-3)>

After preparing a reflux cooling tube and a thermometer in the flask, 42.5 g of 9,9-bisphenol fluorene was added, and 220 mL of epichlorohydrin was injected. After adding 100 mg of tetrabutylammonium bromide, the temperature was raised to 90 °C while stirring was started. After confirming that the unreacted content was less than 0.3%, distillation was carried out under reduced pressure. After lowering the temperature to 30 °C, dichloromethane was injected, and sodium hydroxide was slowly added thereto. After confirming that the product was 96% or more by high performance liquid chromatography (HPLC), 5% HCl was added dropwise to terminate the reaction. After the reaction product was extracted and separated into layers, the organic layer was washed with water and washed to become neutral. The organic layer was dried over MgSO ₄ and concentrated by distillation under reduced pressure using a rotary evaporator. Dichloromethane was added to the concentrated product, and methanol was added while raising the temperature to 40 ℃ while stirring, lowering the solution temperature, stirring, filtering the resulting solid, and vacuum drying at room temperature to obtain 52.7 g of a white solid powder.

The obtained white solid powder was placed in a 3-Neck flask, and 27 g of thiophenol and 32 g of ethanol were added and stirred. 16.3 g of triethylamine was slowly added dropwise to the reaction solution. After completion of the reaction, ethanol was removed by distillation under reduced pressure, organic matter was dissolved in dichloromethane, washed with water, and dichloromethane was removed by distillation under reduced pressure. The same amount of PGMEA solvent was added to the 3-neck flask to prepare a 50% solution, and then the temperature was raised to 115 °C. 31.1 g of 3,3',4,4'-biphenyltetracarboxylic dianhydride was added dropwise at 115°C, followed by stirring while maintaining 115°C for 6 hours. After adding 7.35 g of phthalic anhydride and stirring for an additional 2 hours, the reaction was terminated. The weight average molecular weight of the prepared alkali-soluble resin is 3,500 g/mol.

<Synthesis Example 4: Synthesis of alkali-soluble resin (B-4)>

Alkali-soluble resin B-4 was obtained in the same manner except for using dibenzosuberenone instead of 9,9-bisphenolfluorene in the synthesis method of B-3 of alkali-soluble resin shown in Synthesis Example 3 above. The weight average molecular weight of the prepared binder is 3,380 g/mol.

<Examples and Comparative Examples: Preparation of photosensitive resin composition>

With reference to Table 1 below, photosensitive resin compositions according to Examples 1 to 9 were prepared.

unit:
weight% Colorant (A) Alkali-soluble resin (B) polymeric
compound
(C) polymerization
initiator
(D) pigment
dispersant Oxidation
inhibitor solvent
(E) A-1 A-2 B-1 B-2 B-3 B-4 Example 1 0.23 12.17 8.53 1.01 1.02 0.61 76.43 Example 2 0.68 11.94 9.79 0.99 1.00 0.59 75.01 Example 3 1.13 11.77 10.63 0.98 0.99 0.59 73.91 Example 4 1.51 11.58 11.66 0.96 0.97 0.58 72.74 Example 5 0.73 11.94 9.74 0.99 1.00 0.59 75.01 Example 6 0.73 11.94 9.74 0.99 1.00 0.59 75.01 Example 7 0.73 11.94 9.74 0.99 1.00 0.59 75.01 Example 8 0.73 0.2 11.78 10.73 0.98 0.99 0.59 74.00 Example 9 0.73 0.16 11.88 10.03 0.99 1.00 0.59 74.62 Colorant (A)
A-1: titanium oxide (TiO ₂ )
A-2 : CI Pigment Blue 15:6

Alkali-soluble resin (B)
B-1: Alkali-soluble resin of Synthesis Example 1 (B-1)
B-2: Alkali-soluble resin of Synthesis Example 2 (B-2)
B-3: Alkali-soluble resin of Synthesis Example 3 (B-3)
B-4: Alkali-soluble resin of Synthesis Example 4 (B-4)

Polymeric compound (C): dipentaerythritol hexaacrylate (KAYARD DPHA, manufactured by Nippon Chemical)

Polymerization initiator (D): Irgacure OXE-02 (manufactured by BASF)

Pigment dispersant: DISPERBYK-110 (manufactured by BYK)

Antioxidant: Sumilizer GP (manufactured by Sumitomo Chemical)

Solvent (E): propylene glycol monomethyl ether acetate (PGMEA)

<Experimental example>

(1) Preparation of pattern cured film

A 5 cm Х 5 cm glass substrate (Corning) was washed with a neutral detergent and water and dried. Each of the photosensitive resin compositions according to Examples was spin-coated on the glass substrate to a final film thickness of 10 μm, pre-baked at 100° C., and dried for 2 minutes to remove the solvent. Thereafter, a mask including a line/space pattern of 1 to 100 μm or a 40 mm Х 40 mm pattern was exposed at an exposure amount of 50 mJ/cm ² , and the unexposed portion was removed using an aqueous alkali solution. The prepared cured film was then baked at 230° C. for 20 minutes to prepare a pixel-partition integrated pattern cured film having a thickness of 10 μm.

(2) Evaluation of transmittance, reflectance and viewing angle

After measuring the transmittance and reflectance at 450 nm using CM-3700d (manufactured by MINOLTA) for the prepared coating film having a thickness of 10 μm, the evaluation results are shown in Table 2 below.

In addition, after evaluating the viewing angle using the EZCON model, the evaluation results are described in Table 2 below.

Specifically, the viewing angle was evaluated as a ratio of the luminance observed at 30° to the luminance observed from the front (0°) as shown in Equation 1 below.

[Equation 1]

Viewing angle (%) = Luminance at 30˚ / Luminance at front (0˚)

450 nm transmittance (%) 450 nm reflectance (%) Viewing angle (%) Example 1 83.2 12.1 8% Example 2 58.0 33.2 15% Example 3 48.1 37.7 23% Example 4 42.3 40.0 38% Example 5 58.1 33.3 15% Example 6 58.3 33.4 18% Example 7 58.1 33.2 18% Example 8 38.1 31.3 22% Example 9 42.8 31.0 19%

Referring to Table 2, the transmittance of the coating film formed by the photosensitive resin composition according to Examples 1 to 9 at a wavelength of 450 nm is 30% or more, and the transmittance at a wavelength of 450 nm is greater than the reflectance to easily transmit blue light while , shows a good viewing angle.

Therefore, it can be seen that the photosensitive resin composition according to the present invention is particularly suitable for integrally forming the blue pixel portion and the partition wall.

(3) Evaluation of the occurrence rate of bad pixels

With the photosensitive resin composition according to Examples 4 to 8, a color conversion panel manufactured by forming barrier ribs as shown in FIG. 1A and performing an inkjet process to respectively form barrier ribs and pixels, and a pixel as shown in FIG. 2A -The partition wall integrated structure was formed and the inkjet process was performed to evaluate the incidence of defective pixels for each color conversion panel manufactured including the pixel-block integrated structure, and the evaluation results are shown in Table 3 below.

Specifically, the bad pixel generation rate was evaluated as the number of bad pixels generated per 1 million pixels included in each color conversion panel, and the bad pixels and the good pixels are as shown in FIG. 3 .

Color conversion panel according to Fig. 1a Color conversion panel according to Fig. 2a Example 4 1350 pieces 650 pieces Example 5 1130 pieces 330 pieces Example 6 650 pieces 118 pieces Example 7 610 pieces 103 pieces Example 8 675 pieces 132 pieces

Referring to Table 3 above, in the case of a color conversion panel manufactured by forming barrier ribs and performing an inkjet process to respectively form barrier ribs and pixels, the number of defective pixels per 1 million pixels is higher than that of a color conversion panel including a pixel-block integrated structure. As 507 to 800 more are formed, it can be seen that the occurrence rate of bad pixels is higher.

Therefore, it can be seen that the color conversion panel including the pixel-partition integrated structure manufactured by the photosensitive resin composition according to the present invention has a reduced rate of defective pixels compared to the color conversion panel manufactured by forming the partition wall and the pixel unit in a separate process in the prior art. can

Claims (13)

A photosensitive resin composition comprising a colorant (A) containing a white pigment, an alkali-soluble resin (B), a polymerizable compound (C), a polymerization initiator (D) and a solvent (E),
A photosensitive resin composition for integrally forming at least one pixel portion and a partition wall.
The method according to claim 1, The average particle diameter of the white pigment is 150 to 300 nm, the photosensitive resin composition.
The photosensitive resin composition of claim 1, wherein the white pigment comprises titanium oxide (TiO ₂ ).
The method according to claim 3, The titanium oxide (TiO ₂ ) The surface of the silicon oxide (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ), zirconium oxide (ZrO ₂ ) and at least one selected from the group consisting of organic materials The surface-treated, photosensitive resin composition.
The photosensitive resin composition of claim 1, wherein the colorant (A) further comprises a blue pigment.
The photosensitive resin composition of claim 5, wherein the content of the white pigment is three times or more of the content of the blue pigment.
The method according to claim 1, The cured film made of the photosensitive resin composition, when the thickness is 7㎛ to 15㎛, transmittance at a wavelength of 450 nm is 30% or more, the photosensitive resin composition.
The method according to claim 7, The cured film made of the photosensitive resin composition, when the thickness is 7㎛ to 15㎛, the transmittance at a wavelength of 450 nm is greater than the reflectance, the photosensitive resin composition.
The photosensitive resin composition of claim 1, wherein the photosensitive resin composition is for integrally forming a pixel portion and a partition of a color conversion panel using a blue light source.
The method according to claim 1,
With respect to the total weight of solids in the photosensitive resin composition,
0.5 to 30% by weight of a colorant (A);
20 to 70% by weight of alkali-soluble resin (B);
5 to 50% by weight of a polymerizable compound (C);
0.01 to 10 wt% of a polymerization initiator (D); and
With respect to the total weight of the photosensitive resin composition,
A solvent (E) containing 60 to 90% by weight, the photosensitive resin composition.
The photosensitive resin composition of claim 1, further comprising at least one selected from the group consisting of fillers, polymer compounds, curing agents, surfactants, pigment dispersants, adhesion promoters, antioxidants, ultraviolet absorbers, and anti-aggregation agents.
A pixel-partition integrated structure made of the photosensitive resin composition of any one of claims 1 to 11.
A display device including the pixel-partition integrated structure of claim 12 .

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