KR102464914B1 - A light converting resin composition, a light converting unit and a display device using the same - Google Patents

Abstract

The present invention is a light conversion resin composition comprising a plurality of quantum dots, a binder resin and a solvent, wherein the plurality of quantum dots are two or more types of quantum dots having different central emission wavelengths (λmax), and the central emission wavelengths of the first quantum dots and the second quantum dots (λmax) ) the difference is 70 nm or more, the half width of the first quantum dot and the second quantum dot is 45 nm or less, the first quantum dot has a central emission wavelength of 510 to 540 nm, and the second quantum dot has a central emission wavelength of 610 to 640 nm, and the The plurality of quantum dots relates to a light conversion resin composition, characterized in that 1 to 60 parts by weight based on the total weight of the solid content of the light conversion resin composition, a light conversion laminated substrate including the same, and an image display device using the same.

Description

A light converting resin composition, a light converting laminate including the same, and an image display device using the same {A light converting resin composition, a light converting unit and a display device using the same}

The present invention relates to a light conversion resin composition using quantum dots and a light conversion laminated substrate including the same, and more particularly, to an image display device including a light conversion resin composition and a light conversion laminated substrate formed using the same.

In an LCD (Liquid Crystal Display) TV that uses a light emitting diode (LED) as a backlight unit (BLU), the LED BLU is one of the most important parts of the LCD TV as it actually emits light.

As a method of forming a white LED BLU, usually red (Red, R), green (Green, G)

and blue (Blue, B) LED chips are combined to form a white LED BLU, or white is implemented using a combination of a blue LED chip and a yellow (Y) phosphor having a wide emission wavelength at half maximum.

However, when combining red, green, and blue LED chips, there is a problem of high manufacturing cost depending on the number of LED chips and complicated processes. This does not work, so the color purity is lowered, and there is a problem of a decrease in color reproducibility. Similarly, an optical film containing quantum dots is applied to a backlight using a blue LED chip to improve color reproducibility and luminance of an image display device.

However, in the case of the optical film, structures such as a barrier layer and a base layer in addition to the light emitting layer including quantum dots are complicated, and accordingly, the emission luminance of the quantum dots is lowered. In addition, it may cause problems in long-term reliability as it is processed at a low process temperature to be processed into an optical film form.

In addition, [PCT/JP2015/059710] and [Patent Publication 10-2016-0030242] disclose the central emission wavelengths of quantum dots A and B used, but there is a problem that it is difficult to implement sufficient color reproducibility through the disclosed two types of quantum dots. Also, there is a problem of luminance lowering due to the use of a solvent having insufficient polarity, and improvement thereof is required.

Korean Patent Application No. 2013-0007296 Korean Patent Application No. 2013-0100516 Korean Patent Application No. 2015-0045669 International Patent Application PCT-JP2015-059710 Republic of Korea Patent Publication No. 2016-0030242

In the case of the optical film of the prior art, in addition to the light emitting layer containing quantum dots, the structure of the barrier layer and the base layer becomes complicated, and accordingly, the problem that the emission luminance of the quantum dots is lowered. It is an invention devised to solve the problem of long-term reliability that occurs as the process progresses, and an object of the invention is to provide a light conversion resin composition having an improved effect by including two or more types of quantum dots having different central emission wavelengths of quantum dots.

Another object of the present invention is to provide a light conversion laminated substrate formed of the above-described light conversion resin composition and an image display device including the same.

In order to achieve the above object, the present invention enables the light conversion resin composition according to the present invention to form a simplified structure by including two or more types of quantum dots having different central emission wavelengths (λmax), and the quantum dots have excellent light emitting luminance effect. and provides a highly reliable light conversion resin composition.

The present invention is a light conversion resin composition comprising a plurality of quantum dots, a binder resin and a solvent, wherein the plurality of quantum dots are two or more types of quantum dots having different central emission wavelengths (λmax), and the central emission wavelengths of the first quantum dots and the second quantum dots ( λmax) difference is 70 nm or more, and the half width of the first quantum dot and the second quantum dot is 45 nm or less,

The first quantum dot has a central emission wavelength of 510 to 540 nm,

The second quantum dot has a central emission wavelength of 610 to 640 nm,

The plurality of quantum dots provides a light conversion resin composition, characterized in that 1 to 60 parts by weight based on the total weight of the solid content of the light conversion resin composition.

The present invention provides a light conversion resin composition comprising a plurality of quantum dots, a binder resin and a solvent, the light conversion resin composition comprising at least one of a thermally polymerizable resin and a thermosetting agent. The plurality of quantum dots may be the aforementioned plurality of quantum dots.

In the present invention, the solvent is included in an amount of 45 to 90 parts by weight based on 100 parts by weight of the total photopolymerization composition, and the polarity of the solvent is 4 to 7 to provide a light conversion resin composition.

The present invention, the boiling point of the solvent provides a light conversion resin composition of 100 ℃ to 200 ℃.

In the present invention, the binder resin provides a light conversion resin composition comprising at least one selected from cardo-based resins or acrylic resins.

The present invention provides a light conversion resin composition in which the binder resin includes a cardo-based resin as an essential component, and further includes an acrylic resin.

The present invention provides a light conversion resin composition further comprising scattering particles.

The present invention provides a light conversion resin composition, wherein the scattering particles are metal oxides.

In the present invention, the metal oxide is Al ₂ O ₃ , SiO ₂ , ZnO, ZrO ₂ , BaTiO ₃ , TiO ₂ , Ta ₂ O ₅ , Ti ₃ O ₅ , ITO, IZO, ATO, ZnO-Al, Nb ₂ O ₃ , SnO, MgO, and provides a light conversion resin composition comprising at least one selected from the group consisting of combinations thereof.

In addition, when the laminated substrate on which the photoconversion resin composition of the present invention is laminated is used, it is possible to provide a high-quality image display device having a simple structure, excellent luminance, and long-term reliability at high temperature and high humidity.

In addition, the present invention provides a light conversion laminated substrate comprising the light conversion resin composition.

In addition, the present invention provides an image display device having the light conversion laminated substrate.

The light conversion resin composition according to the present invention can form a simplified structure by including two or more types of quantum dots having different central emission wavelengths (λ max ), and has excellent light emission luminance effect of quantum dots, and a highly reliable light conversion resin composition to provide.

In addition, when the glass substrate on which the photoconversion resin composition of the present invention is laminated is used, a high-quality image display device having a simple structure and excellent luminance and long-term reliability in high temperature and high humidity conditions can be provided.

1 is a schematic cross-sectional view showing a liquid crystal display device to which a conventional quantum dot film (QD layer) is applied.
2 is a schematic cross-sectional view showing a liquid crystal display device to which the light conversion resin composition according to Example 1 of the present invention is applied.

The present invention relates to a light conversion resin composition comprising a plurality of quantum dots, a binder resin and a solvent, wherein the plurality of quantum dots are two or more types of quantum dots having different central emission wavelengths (λmax).

In the light conversion resin composition of the present invention, the plurality of quantum dots satisfy a specific range in which the difference between the central emission wavelength (λmax) and the half width of the first quantum dot and the second quantum dot is within a specific range; And/or when it contains at least one of a thermal polymerization resin and a thermosetting agent, the light conversion resin composition according to the present invention can form a simplified structure, the light emitting luminance effect of quantum dots is excellent, and there is an advantage of high reliability. It was confirmed experimentally.

The present invention also relates to a light conversion laminated substrate and an image display device manufactured using the light conversion resin composition. When the laminated substrate on which the light conversion resin composition of the present invention is laminated is used, it is possible to provide a high-quality image display device having a simple structure, excellent luminance, and long-term reliability in high temperature and high humidity conditions.

< Light conversion resin composition >

multiple quantum dots

The quantum dots included in the light conversion resin composition of the present invention 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 characteristics, they are called quantum dots. When these quantum dots receive energy from the outside and reach an excited state, they have a characteristic of emitting energy corresponding to the energy band gap. In short, the light conversion resin composition of the present invention includes such quantum dots, it is possible to convert the light into green light and red light through the incident blue light source.

The quantum dot is not particularly limited as long as it can emit light by stimulation by light, and for example, a group II-VI semiconductor compound, a group III-V semiconductor compound, a group IV-VI semiconductor compound, and a group IV element or a compound containing the same. One or more selected from may be used.

The group 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 CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof may be at least one selected from the group consisting of quaternary compounds,

The group III-V semiconductor compound may include a binary compound selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and 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 one selected from the group consisting of 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. may be more than

The group IV-VI semiconductor compound may include 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 SnPbSSe, SnPbSeTe, SnPbSTe, and may be at least one member selected from the group consisting of a quaternary compound selected from the group consisting of mixtures thereof,

The group IV element or a compound containing the same is an elemental compound selected from the group consisting of Si, Ge, and mixtures thereof; And SiC, SiGe, and may be one or more selected from the group consisting of a binary compound selected from the group consisting of mixtures thereof, but is not limited thereto.

The quantum dots have a homogeneous single structure; dual structures such as core-shell structures, gradient structures, and the like; Or it may be a mixed structure thereof. For example, in the double structure of the core-shell, the materials constituting each core and the shell may be formed of the different semiconductor compounds mentioned above. More specifically, the core may include one or more materials selected from CdSe, CdS, ZnS, ZnSe, CdTe, CdSeTe, CdZnS, PbSe, AgInZnS, and ZnO, but is not limited thereto. The shell may include at least one material selected from CdSe, ZnSe, ZnS, ZnTe, CdTe, PbS, TiO, SrSe, and HgSe, but is not limited thereto.

The quantum dots may be synthesized by a wet chemical process, metal organic chemical vapor deposition (MOCVD), or molecular beam epitaxy (MBE), but is not limited thereto. .

The quantum dots may include two or more types of quantum dots having different central emission wavelengths for light conversion into green light and red light using an incident blue light source. The difference between the preferred central emission wavelength of the first quantum dot and the second quantum dot is 50 nm or more, and the preferred range is 70 nm or more.

In addition, the central emission wavelength range of each quantum dot may be a first quantum dot having a central emission wavelength of 510 nm to 540 nm and a second quantum dot having a central emission wavelength of 610 nm to 640 nm. When the central emission wavelength of the first quantum dot is less than 510 nm or exceeds 540 nm, the green expression of the image display device is insufficient, and when the central emission wavelength of the second quantum dot is less than 610 nm or exceeds 640 nm, the red expression of the image display device This insufficient amount may cause a problem in color reproducibility.

The total content of the quantum dots is not particularly limited in the present invention, but is preferably included in an amount of 1 to 60 parts by weight, preferably 2 to 50 parts by weight, based on 100 parts by weight of the total solid content of the light conversion resin composition. When the quantum dots are included within the above range, there is an advantage in that the luminous efficiency is excellent and the reliability of the coating layer is excellent. When the quantum dots are included below the above range, the light conversion efficiency of green light and red light may be insufficient. It is preferable to do

binder resin

In the present invention, as a binder resin, one or two or more selected from a cardo-based binder or an acrylic binder can be mixed and used.

The cardo-based binder resin has reactivity by the action of light or heat, and acts as a dispersion medium for quantum dots. The cardo-based binder resin contained in the light conversion resin composition of the present invention acts as a binder resin for quantum dots, and is not limited as long as it is a resin that can be used as a support for the light conversion coating layer.

The cardo-based binder resin may include at least one repeating unit of Formulas 1 to 6 below.

[Formula 1]

[Formula 2]

[Formula 3]

[Formula 4]

In Formulas 1 to 4,

,

,

,

,

,

,

,

,

,

,

,

또는

이고,X and X' are each independently a single bond, -CO-, -SO ₂ -, -C(CF ₃ ) ₂ -, -Si(CH ₃ ) ₂ -, -CH ₂ -, -C(CH ₃ ) ₂ -, -O-,

,

,

,

,

,

,

,

,

,

,

,

or

ego,

Y is an acid anhydride residue,

Z is an acid dianhydride residue,

R''' is a hydrogen atom, an ethyl group, a phenyl group, -C ₂ H ₄ Cl, -C ₂ H ₄ OH or -CH ₂ CH=CH ₂

R1, R1', R2, R2', R3, R3', R4, R4', R5, R5', R6 and R6' are each independently a hydrogen atom or a methyl group;

R7, R7', R8 and R8' are each independently a linear alkylene group having 1 to 6 carbon atoms or a branched alkylene group having 3 to 6 carbon atoms, and the alkylene group is an ester bond, a cycloalkylene group having 6 to 14 carbon atoms. And it may be interrupted by at least one of an arylene group having 6 to 14 carbon atoms,

R9, R9', R10, R10', R11, R11', R12 and R12' are each independently a hydrogen atom, a halogen atom, a linear alkyl group having 1 to 6 carbon atoms, or a branched chain alkyl group having 3 to 6 carbon atoms;

m and n are integers satisfying 0 ≤ m ≤ 30 and 0 ≤ n ≤ 30, respectively,

provided that m and n are not 0 at the same time.

[Formula 5]

[Formula 6]

In Formulas 5 and 6,

,

,

,

또는

이고,P is each independently

,

,

,

or

ego,

R13 and R14 are each independently hydrogen, a hydroxyl group, a thiol group, an amino group, a nitro group or a halogen atom;

Ar1 is each independently a C6 to C15 aryl group,

Y' is an acid anhydride residue,

Z' is an acid dianhydride residue,

A is O, S, N, Si or Se,

a and b are each independently an integer of 1 to 6,

p and q are each independently an integer from 0 to 30,

provided that p and q are not 0 at the same time.

When the light conversion resin composition according to the present invention includes a cardo-based binder resin including at least one repeating unit among the repeating units of Chemical Formulas 1 to 6, reliability between processes is excellent, and outgas generation is minimized to minimize the generation of outgass. It has the advantage of providing high-quality image quality, excellent heat resistance, chemical resistance, durability and reliability due to its excellent anti-reflection effect without generating an afterimage during operation.

Y in Formulas 1 and 3 is a residue of an acid anhydride, and may be obtained by reacting a bisphenol epoxy acrylate compound, which is a synthetic intermediate of the cardo-based binder resin of the present invention, with an acid anhydride compound. The acid anhydride compound capable of introducing the residue Y is not particularly limited and includes, for example, maleic anhydride, succinic anhydride, itaconic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methylene anhydride and methylenetetrahydrophthalic acid. , chlorendic anhydride, methyltetrahydrophthalic anhydride, and the like.

Z in Formulas 2 and 4 is a residue of acid dianhydride, and may be obtained by reacting a bisphenol epoxy acrylate compound, which is a synthetic intermediate of the cardo-based binder resin of the present invention, with an acid dianhydride compound. The acid dianhydride compound capable of introducing the residue Z is not particularly limited, and for example, aromatics such as pyromellitic anhydride, benzophenone tetracarboxylic dianhydride, biphenyltetracarboxylic dianhydride, and bitenyl ether tetracarboxylic dianhydride and polyhydric carboxylic acid anhydrides.

The 'acid dianhydride' refers to a compound including two acid anhydride groups in a molecule.

In the present invention, the method for producing the cardo-based binder resin is not particularly limited. For example, after reacting a bisphenol compound and an epoxy compound to synthesize a bisphenol epoxy compound, reacting the synthesized bisphenol epoxy compound with an acrylate compound to synthesize a bisphenol epoxy acrylate compound, and then adding the bisphenol epoxy acrylate compound to an acid anhydride, acid It may be prepared by reacting with dianhydride or a mixture thereof, but is not limited thereto.

On the other hand, the acrylic resin in the present invention includes, for example, a carboxyl group-containing monomer, and a copolymer of the monomer and other copolymerizable monomers. Examples of the carboxyl group-containing monomer include unsaturated carboxylic acids such as unsaturated monocarboxylic acids, unsaturated dicarboxylic acids, and unsaturated polycarboxylic acids having one or more carboxyl groups in the molecule such as unsaturated tricarboxylic acids. have. Here, as an unsaturated monocarboxylic acid, acrylic acid, methacrylic acid, a crotonic acid, (alpha)-chloroacrylic acid, cinnamic acid etc. are mentioned, for example. Examples of the unsaturated dicarboxylic acid include maleic acid, fumaric acid, itaconic acid, citraconic acid, and mesaconic acid. 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 unsaturated polyhydric carboxylic acid may be its mono(2-methacryloyloxyalkyl) ester, for example, succinic acid mono(2-acryloyloxyethyl), succinic acid mono(2-methacryloyloxyethyl) ), mono(2-acryloyloxyethyl phthalate), mono(2-methacryloyloxyethyl) phthalate, etc. are mentioned. The unsaturated polyhydric carboxylic acid may be a mono (meth) acrylate of the dicarboxy polymer at both ends, and examples thereof include ω-carboxypolycaprolactone monoacrylate and ω-carboxypolycaprolactone monomethacrylate. . These carboxyl group-containing monomers can be used individually or in mixture of 2 or more types, respectively. Examples of the other monomer copolymerizable with the carboxyl group-containing monomer include styrene, α-methylstyrene, o-vinyltoluene, m-vinyltoluene, p-vinyltoluene, p-chlorostyrene, o-methoxystyrene, m-methyl Toxystyrene, p-methoxystyrene, o-vinylbenzylmethyl ether, m-vinylbenzylmethylether, p-vinylbenzylmethylether, o-vinylbenzylglycidylether, m-vinylbenzylglycidylether, p- aromatic vinyl compounds such as vinyl benzyl 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 Late, methoxypropylene glycol acrylate, methoxypropylene glycol methacrylate, methoxydipropylene glycol acrylate, methoxydipropylene glycol methacrylate, isobornyl acrylate, isobornyl methacrylate, dicyclopentadienyl Acrylate, dicyclopentadiethyl methacrylate, adamantyl (meth) acrylate, norbornyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-hydroxy-3- unsaturated carboxylic acid esters such as phenoxypropyl methacrylate, glycerol monoacrylate, and glycerol monomethacrylate; 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; Maleimide, benzylmaleimide, N-phenylmaleimide. unsaturated imides such as N-cyclohexyl maleimide; 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. and macromonomers having These monomers can be used individually or in mixture of 2 or more types, respectively.

In addition, 2,000 g/mol to 200,000 g/mol, preferably polystyrene-converted weight average molecular weight (hereinafter simply referred to as 'weight average molecular weight') measured by gel permeation chromatography (GPC; tetrahydrofuran is used as the elution solvent) Preferably, the cardo-based binder resin or the acrylic resin is 3,000 g/mol to 100,000 g/mol. When the molecular weight is in the above range, the hardness of the coating is improved, and it is preferable to prevent deterioration of the light emitting properties of the quantum dots by the external environment.

The molecular weight distribution [weight average molecular weight (Mw)/number average molecular weight (Mn)] of the cardo-based binder resin or acrylic resin is preferably 1.0 to 6.0, and more preferably 1.5 to 6.0. A molecular weight distribution [weight average molecular weight (Mw)/number average molecular weight (Mn)] of 1.5 to 6.0 is preferable because reliability is excellent.

The cardo-based binder resin of the present invention may be used in an amount of 40 to 99% by weight, preferably 50 to 98% by weight, based on the total amount of solids in the light conversion resin composition. If the content of the binder resin is within the above range, the formation of the coating layer and the protection properties of quantum dots are good, so it is easy to improve the light emitting properties and reliability. It can cause problems where the characteristics are not sufficient.

In addition, the present invention may further include a cardo-based binder resin as an essential component and an acrylic resin. At this time, when the cardo-based binder resin is used in an amount of 10 to 800 parts by weight, more preferably 15 to 600 parts by weight, based on the acrylic resin, it exhibits more effective properties for improving heat resistance and luminance.

When the cardo-based binder resin is less than the above range, the luminance is lowered, and when it exceeds the above range, the heat resistance is lowered.

solvent

The solvent contained in the light conversion resin composition of this invention contains 1 type or 2 or more types normally.

The solvent in the present invention preferably has a solvent polarity of 7 or less when alone or when two or more kinds are mixed, and it is more preferable to use a solvent having a polarity in the range of 4 to 7. When the polarity is out of the above range, it may be a factor of lowering the luminance characteristics of the light conversion resin composition. In addition, when two or more solvents are mixed, even if the polarity value of the mixed solvent satisfies the above range, if at least one solvent among the solvents constituting the mixed solvent does not satisfy the polarity range, it is still It may cause a problem of luminance degradation.

Further, it is appropriate that the boiling point is in the range of 100°C to 200°C, more preferably 100°C to 180°C, when used alone or when two or more types are mixed. If it is less than the above range, there is a risk of poor coating film uniformity and nozzle clogging due to the fast drying speed.

The solvent satisfying the polarity may include, for example, those listed in Table 1 below, but is not limited thereto.

solvent Polarity(δp)* Boiling Point (℃) Dipropylene Glycol Methyl Ether 4 190 Propylene Glycol Methyl Ether Acetate 5.6 146 Dipropylene Glycol Methyl 4.9 209 Propylene Glycol n-Propyl Ether 4.9 149 Propylene Glycol n-Butyl Ether 4.2 171 Propylene Glycol Phenyl Ether 5.3 243 Triethylene Glycol Methyl Ether 7 249 Ethylene glycol monoethyl ether acetate 4.7 156 Triethylene Glycol Ethyl Ether 6.8 256 Diethylene Glycol n-Butyl Ether 7 230 Triethylene Glycol n-Butyl Ether 6.4 279 Ethylene Glycol n-Butyl Ether Acetate 4.5 192 Diethylene Glycol n-Butyl Ether Acetate 4.1 245 Ethylene Glycol Hexyl Ether 6.9 208 Ethylene Glycol Phenyl Ether 6.1 254 n-Butanol 5.7 117.7 Isobutanol 5.7 107.9 Isopropanol 6.1 82.3 2-Methyl Butanol 5.1 128.7 n-Pentanol 4.5 137.9 n-Propanol 6.8 97.2 Isopropyl Acetate 4.5 88.5 n-Propyl Acetate 4.3 101.5 n-Butyl Propionate 5.4 144.7 n-Pentyl Propionate 5.1 165 n-Propyl Propionate 5.8 122.4 Cyclohexanone 6.3 155.6 Methyl Isobutyl Ketone 6.1 116.1

In Table 1, Polarity means the numerical value of the polarity (δp) in the Hansen solubility parameter.

In the present invention, when the solvent is used alone and the boiling point is out of 100°C to 200°C, a mixed solvent having the above boiling point range may be used by mixing two or more types.

If necessary, the solvent according to the present invention may include a halogenated hydrocarbon-based solvent in addition to the solvents exemplified above; aromatic hydrocarbon solvents; and aliphatic saturated hydrocarbon solvents; It may further include an ether and ester solvent.

The halogenated hydrocarbon-based solvent may include, for example, chloroform, dichloromethane, methylene chloride, carbon tetrachloride, dichloroethane, tetrachloroethane, and the like, but is not limited thereto.

The aromatic hydrocarbon-based solvent may include, but is not limited to, benzene, toluene, dichlorobenzene, and xylene.

The aliphatic saturated hydrocarbon-based solvent may include, but is not limited to, chain alkane such as N-hexane, pentane, and heptane, cyclic alkane such as cyclopentane and cyclohexane, and kerosene.

Specific examples of the ether and ester solvents include,

Methyl isoamyl ketone, diisobutyl ketone, diethyl carbonate, ethyl butyrate, ethyl isobutyrate, tert-butyl acetate, isopropyl propionate, methyl-3-methylbutanoate, propyl propionate, methyl 2 -Methyl butanoate, sec-butyl acetate, methyl pentanoate, isobutylacetate, butyl acetate, methyl fivalate, sec-butyl propionate, n-butyl propionate, 2-methyl butyl acetate, ethyl 2- Methylbutyrate, methyl 2-methylpentanoate, 2-pentyl acetate, neopentyl acetate, 3-methylbutan-2-yl acetate, isopropyl isobutyrate, propyl isobutyrate, ethyl isovalerate, methyl 3-methyl pentano ate, ethyl pentanoate, methyl 4-methyl pentanoate, methyl hexanoate, isoamyl acetate, pentyl acetate, isopropyl butyrate, propyl butanoate, isobutyl propionate, 2,2-dimethyl butanoic acid Methyl ester, ethyl pivalate, tert-amyl acetate, tert-butyl propionate, methyl 3,3-dimethylbutyrate, diethylacetic acid methyl ester, 3-pentyl acetate, 2,3-dimethylbutanoic acid methyl ester , propyl 2-methylbutanoate, ethyl hexanoate, isopropyl 2-methylbutanoate, isobutyl isobutanoate, 2-methylbutyl propionate, 2-hexyl acetate, 1-methylbutyl propanoate , methyl 2-ethyl-3-methylbutyrate, 3-methylpentyl 3-acetate, 3-hexyl acetate, 2,2-dimethyl-3-acetoxybutane, ethyl 2-methylpentanoate, sec-butyl butyrate, ethyl 3-Methylpentanoate, ethyl 2,3-dimethylbutanoate, 2,3-dimethyl-2-butyl acetate, 2-ethylbutyl acetate, acetic acid-(2,2-dimethyl-butyl ester), 2 ,3-dimethylbutyl acetate, 3-methyl-1-pentyl acetate, 3,3-dimethylbutyl acetate, n-butyl isobutyrate, isopropyl pentanoate, butyl butyrate, amyl propionate, hexyl acetate, propyl 3-methylbutanoate, methyl heptanoate, isopropyl 3-methylbutanoate, isobutyl butyrate, sec-butyl isobutyrate, propyl pentanoate, isoamyl propionate, ethyl 4-methylpentanoate, 4-methyl-1-pentyl acetate, methyl 5-methylhexanoate, methyl 2-ethyl-2-methylbutyrate, 2,2-dimethyl-pentanoic acid methyl ester, ethyl 2,2-dimethylbutanoate, i -Propyl pivalate, propyl 2,2-dimethylpropanoate, 2,2-dimethyl-1-propanol propanoate, ethyl 3,3-dimethylbutanoate, 2-methyl-3-pentyl acetate, acetic acid -(2-Methyl-pentyl ester), 4-methyl-2-pentyl acetate, tert-butyl 2-methylpropanoate, 2,3-dimethyl-valeric acid methyl ester, 2-ethyl-valeric acid methyl ester , methyl-2-methylcaproate, 2-methylpentan-2-yl acetate, tert-butyl butyrate, 3-ethyl-valeric acid methyl ester, ethyl 2-ethylbutanoate, sec-amyl propionate, methyl 2,3,3-trimethyl butanoate, 3,3-dimethylpentanoic acid methyl ester, tert-amyl propanoate, methyl 2,4-dimethyl pentanoate, methyl 2,2,3-trimethylbutanoate , 3-methyl-pentyl-2-acetate, methyl 4,4-dimethylpentanoate, methyl 3,4-dimethylpentanoate, valeric acid isobutyl ester, 2-methylbutyl butanoate, valeric acid sec -Butyl ester, 2-pentyl butanoate, 2-methylpropyl 2-methylbutanoate n-butyl 2-methylbutanoate, isopentyl butanoate, isobutyl isopentanoate, 1-menyl pentyl propanoate ate, 1-methylhexyl acetate, 2-methyl-butyric acid sec-butyl ester, 2-methylpropanoic acid 2-methylbutyl ester, ethyl 3-methylhexanoate, ethyl 2-methylhexanoate, 1 -heptyl acetate, methyl 3-methylheptanoate, 1,1,2,2-tetramethylpropyl acetate, 1-acetoxy-2,3,3-trimethylbutane, acetic acid- (2-ethyl-2- methyl-butyl ester), Acetic acid-(3,3-dimethyl-pentyl ester), acetic acid-(1,3,3-trimethyl-butyl ester), 2,4-dimethyl-3-acetoxypentane, acetic acid-( 2-ethyl-3-methyl-butyl ester), acetic acid-(3-methyl-hexyl ester), acetic acid-(4-methyl-hexyl ester), isobutyric acid-(1,2-dimethyl- propyl ester), 4-methyl-vareric acid propyl ester, 4-methyl-hexanoic acid ethyl ester, methyl 5-methylheptanoate, isovarelic acid sec-butyl ester, isobutyric acid isopentyl ester, butyl Pentanoate, propyl hexanoate, hexyl propionate, methyl octanate, 5-methylhexyl acetate, ethyl isoamylacetate, pentyl butyrate, ethyl heptanoate, isopropyl hexanoate, butyl 3-methylbutanoate , 2-ethyl-3-methyl-vareric acid methyl ester, methyl 2-isopropyl-3-methylbutanoate, 2-ethyl-3-methyl-butyric acid ethyl ester, 2-ethyl-vareric acid ethyl Ester, methyl 2-ethylhexanoate, ethyl 2,4-dimethylpentanoate, methyl 2,5-dimethylhexanoate, acetic acid-(1-ethyl-3-methyl-butyl ester), 4-heptyl Acetate, 4-methyl-2-pentyl propionate, 5-methylhexan-2-yl acetate, 2,2-diethyl-butyric acid methyl ester, acetic acid-(1,1-diethyl-propyl ester) ), 2,3-dimethyl-hexanoic acid methyl ester, 2-ethyl-2-methyl-vareric acid methyl ester, 2-ethyl-2-methylbutyric acid ethyl ester, ethyl 2,2-dimethylpentanoate , 2,2-dimethyl-hexanoic acid methyl ester, 2,2-dimethyl-butyric acid propyl ester, pivalic acid tert-butyl ester, isobutyl pivalate, pivalic acid butyl ester, acetic acid-(1 ,2-Dimethyl-pentyl ester), 2,4,4-trimethyl-vareric acid methyl ester, acetic acid-(1-ethyl-1-methyl-butyl ester), 3,3-dimethyl-vareric acid ethyl Ester, isobutyric acid tert-pentyl ester, ter t-Amyl butyrate, 3-acetoxy-2,2-dimethyl-pentane, propionic acid-(3,3-dimethyl-butyl ester), isopropyl 3,3-dimethylbutanoate, 3,3-dimethyl -Butyric acid propyl ester, neopentyl 2-methylpropanoate, neopentyl butanoate, tert-butyl 3-methyl butanoate, tert-butyl pentanoate, 3,3,4-trimethyl-vareric acid Methyl ester, 4,5-dimethyl-hexanoic acid methyl ester, ethyl 4,4-dimethylpentanoate, 3,4-dimethyl-pentanoic acid ethyl ester, acetic acid-(1-isopropyl-butyl ester) , 2-propyl 2-methylpentanoate, methyl 6-methylheptanoate, isopropyl 2-ethylbutyrate, 2-acetoxy-4-methyl-hexane, 2,2,3,3-tetramethylbutano ate, 4-methyl-heptanoic acid methyl ester, methyl 4-ethylhexanoate, ethyl-2,3,3-trimethylbutanoate, 2,2-dimethyl-pentanol-(1)-acetate, 2, 4-Dimethyl-2-pentyl acetate, 2-methyl-2-hexyl acetate, 4,4-dimethylpentyl acetate, pentyl isobutanoate, methyl 2-methylheptanoate, butan-2-yl 2,2-dimethyl Propanoate, methyl 4,4-dimethylhexanoate, 2-propyl-pentanoic acid methyl ester, hexanoic acid-(2,4-dimethyl methyl ester), 2,2,3-trimethylbutanoic acid ethyl ester , 2-methylhexyl acetate, methyl-3,4,4-trimethylpentanoate, propyl-2-ethylbutanoate, isopropyl 2,2-dimethylbutanoate, 3-ethyl-4-methyl-pentanoic Acid methyl ester, methyl 2,2,4-trimethylpentanoate, 2,3-dimethyl-3-pentylacetate, pentan-3-yl 2-methylpropanoate, 3-ethyl-3-methyl-pentanoic acid Methyl ester, methyl 3,4-dimethylhexanoate, 3,3-dimethylphen-1-tyne, ethyl-3-ethyl-pentanoate, methyl 2,2,3-trimethylpentanoate, methyl 2-ethyl -3,3-dimethylpentanoate, pentan-3-yl butyrate, 4-methyl-3-hexyl acetate, 2-methyl-3-methylbutyl promanoic acid ester, 3 -Methoxy-1-pentyl propionate, 2-pentyl 2-methylpropanoate, tert-butyl 2-methylbutanoate, methyl 5,5-dimethylhexanoate, 3,3-dimethyl 2-butyl propanoate Cypionate, 1-ethyl butyl propanoate, 2-methyl-1-pentyl propanoate, n-propyl 2-methylvalerate, sec-amyl valerate, sec-butyl hexanoate, 2-methylbutyl isovare Late, pentanoic acid 2-methylbutyl ester, 2,2,3-trimethyl-vareric acid ethyl ester, 1-methylhexyl propanoate, hexyl-2-butanoate, 2,2-dimethyl-3-hexyl Acetate, 2-methyl-1-butyl 2-methylbutanoate, 3-methylbutyl 2-methylbutanoate, methyl 2,6-dimethylheptanoate, 2-octyl acetate, 1-ethylhexyl acetate, acetic acid Acid-(1-isopropyl-2,2-dimethyl-propyl ester), acetic acid-(2-ethyl-3,3-dimethyl-butyl ester), acetic acid-(2,2,3-trimethyl- pentyl ester), acetic acid-(2,2,3,3-tetramethyl-butyl ester), acetic acid-(1,2,2,3-tetramethyl-butyl ester), acetic acid-(2) -isopropyl-3-methyl-butyl ester), acetic acid-(4-ethyl-hexyl ester), acetic acid-(2,2-diethyl-butyl ester), 3-methyl-vareric acid sec- Butyl ester, isopentyl 3-methylbutanoate, isopropyl heptanoate, 4-methyl-vareric acid isobutyl ester, 4-methyl-heptanoic acid ethyl ester, 3-methylbutyl pentanoate, butyl hexano ate, n-pentyl n-pentanoate, n-propyl heptanoate, 5-methyl-heptanoic acid ethyl ester, ethyl 6-methylheptanoate, hexyl butyrate, octanoic acid ethyl ester, methyl 6-methylocta Noate, heptyl propionate, nonanoic acid methyl ester, 1-octyl acetate, 2,2,3,3-tetramethyl-butyric acid ethyl ester, acetic acid-(1-ethyl-2,2- dimethyl-butyl ester), acetic acid-(1-isopropyl-pentyl ester), acetic acid-(1,2-dimethyl-hexyl ester) ter), 2-iso-propyl-3-methyl-butyric acid ethyl ester, propionic acid-(3,3-dimethyl-pentyl ester), acetic acid-(1-ethyl-3-methyl-pentyl ester) , 2,3,5-Trimethyl-hexanoic acid methyl ester, acetic acid-(1-ethyl-2-methyl-pentyl ester), propionic acid-(1-ethyl-2,2-dimethyl-propyl ester) , ethyl 2,2-diethylbutanoate, 2,2,3-trimethyl-butyric acid isopropyl ester, acetic acid-(1-ethyl-3,3-dimethyl-butyl ester), butyl 2,2 -Dimethylbutyrate, 3-methyl-2-propyl-vareric acid methyl ester, 2-methyl-heptanoic acid ethyl ester, methyl 2-methyloctanoate, butyric acid-(1,3-dimethyl-butyl ester) , 3-ethyl-hexanoic acid ethyl ester, 2-ethyl-2-methyl-vareric acid ethyl ester, ethyl 3,5-dimethylhexanoate, 3,3-dimethyl-vareric acid propyl ester, 2,2 ,4,4-tetramethyl-pentanoic acid methyl ester, ethyl 2,2-dimethyl-hexanoate, butyric acid-(2-ethyl-butylester), 2-ethyl-4-methyl-vareric acid ethyl Ester, ethyl 2-propylpentanoate, methyl 2-propylhexanoate, ethyl 2-ethylhexanoate, acetic acid-(1,1-diethyl-butyl ester), 2,5-dimethyl-hexanoic Acid ethyl ester, ethyl 4,5-dimethylhexanoate, acetic acid-(1-isobutyl-butyl ester), acetic acid-(1-ethyl-4-methyl-pentyl ester), acetic acid-( 1-methyl-1-propyl-butyl ester), isovaleric acid tert-pentyl ester, 3-propyl-hexanoic acid methyl ester, 3-ethyl-heptanoic acid methyl ester, acetic acid-(1,1, 4-trimethyl-pentyl ester), acetic acid-(1,5-dimethyl-hexyl ester), 3-methyl-heptanoic acid ethyl ester, 3,3,5-trimethyl-hexanoic acid methyl ester, 3,3 -Dimethyl-heptanoic acid methyl ester, 3,3-dimethyl-vareric acid isopropyl ester, 2-ethylhexyl acetate, ethyl 2,4,4- Trimethylpentanoate, butyl neopentanoate, neopentyl fivarate, fivaric acid isopentyl ester, 2-ethyl-butyric acid tert-butyl ester, 3,3-dimethyl-butyric acid sec-butyl ester, acetyl Tick acid-(1,4-dimethylbutyl)ester, sec-amyl isovarerate, 3-acetoxy-2,4-dimethylhexane, 3,3-diethyl-pentanoic acid methyl ester, methyl-4,4 -Dimethylheptanoate, methyl 3,5,5-trimethylhexanoate, acetic acid 4-octyl ester, 3,5-dimethyl-heptanoic acid methyl ester, 1-acetoxy-4,4-dimethyl-hex Sein, pentyl 3-methylbutanoate, 7-methyloctanoic acid methyl ester, 2-ethyl-heptanoic acid methyl ester, methyl 2,4-dimethylheptanoate, methyl 2,2-dimethyl heptanoate, pentyl 2,2-Dimethyl propanoate, ethyl 2,3,4-trimethylvalerate, tert-butyl hexanoate, 3-acetoxy-2,5-dimethyl-hexane, 1,1,3,3-tetra Methylbutyl acetate, 2,2,4-trimethylpentyl acetate, methyl 2,2,3,3-tetramethylpentanoate, pentanoic acid-(2,2,3,4-tetramethyl-methyl ester), 2 -Propyl-2-methyl-pentanoic acid methyl ester, 1,1-dimethylethyl 3,3-dimethylbutanoate, tert-butyl 4-methylpentanoate, 2-isopropyl-3,3-dimethyl-buty ric acid methyl ester, methyl 2-ethyl-2-methylhexanoate, ethyl 2-ethyl-3,3-dimethylbutanoate, hexyl isobutanoate, methyl-5,5-dimethylheptanoate, methyl- 2,3,4-trimethylhexanoate, methyl 2,3-dimethyl-2-ethylpentanoate, 3-methyl octanoic acid methyl ester, 2,2-dimethylhexyl acetate, propylneoheptanoate, isopropyl 2-Methylhexanoate, 2-propyl-pentyl-acetate, butyl 2-ethyl butyrate, 4-methyloctanoic acid methyl ester, 2-methylpentanoic acid-(1-methyl propyl ester), 2,2,4 -Trimethyl-hexanoic acid methyl ester, hexanoic acid-(2,2,5-trimethyl-methyl ester), 4-methyl tilpentyl isobutyrate, 3-methylpentyl butyrate, ethyl 3,3,4-trimethylpentanoate, pentanoic acid-(3,4,4-trimethyl-ethyl ester), tert-amyl fivalate, isobutyl 3, 3-dimethylbutyrate, 1-isopropyl-1,2-dimethylpropyl acetate, ethyl 4-ethylhexanoate, methyl 2-ethyl-3,3-dimethylpentanoate, methyl 3,6-dimethylheptanoate, Isobutyl hexanoate, 3,3,4,4-tetramethyl pentanoic acid methyl ester, 2-methylvareric butyl ester, pentyl 2-methylbutanoate, neopentyl 2-methylbutanoate, ethyl 3, 3-dimethylhexanoate, 4-ethyl-3-hexyl acetate, 2,4-dimethylpentan-3-yl propionate, methyl neononanoate, methyl 4,4,5-trimethylhexanoate, methyl di Isopropyl propionate, 1-methylethyl 4-methylhexanoate, butanoic acid 1-ethylbutyl ester, 1-ethylpentyl propanoate, pentan-3-yl pentanoate, methyl 4-ethylheptanoate , pentan-3-yl 3-methylbutanoate, ethyl 5,5-dimethylhexanoate, 2-methyl-3-methylbutyl butanoic acid ester, neryl acetate, or, ethylene glycol monomethyl ether, ethylene glycol mono Ethylene glycol monoalkyl ethers, such as ethyl ether, ethylene glycol monopropyl ether, and ethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, etc. can be used.

Further, diethylene glycol dialkyl ethers; alkylene glycol alkyl ether acetates such as methyl cellosolve acetate, ethyl cellosolve acetate, propylene glycol monoethyl ether acetate, and propylene glycol monopropyl ether acetate; alkoxyalkyl acetates such as methoxybutyl acetate and methoxypentyl acetate; ketones such as methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, and cyclohexanone; alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, and glycerin; esters such as ethyl 3-ethoxypropionate and methyl 3-methoxypropionate; Cyclic esters, such as (gamma)-butyrolactone, etc. can be included.

The content of the solvent in the light conversion resin composition of the present invention may be included in an amount of 45 to 90 parts by weight, preferably 50 to 90 parts by weight, based on the total content of the light conversion resin composition. When the solvent is contained within the above range, it is preferable because the applicability tends to be good 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. .

scattering particles

The light conversion resin composition according to the present invention may include scattering particles. The scattering particles may use a conventional inorganic material, and preferably may include a metal oxide having an average particle diameter of 30 to 1000 nm.

The metal oxide is Li, Be, B, Na, Mg, Al, Si, K, Ca, Sc, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, Ge, Rb, Sr, Y, Mo, Cs, Ba, La, Hf, W, Tl, Pb, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Ti, Sb, Sn, Zr, Nb, It may be an oxide including one type of metal selected from the group consisting of Ce, Ta, In, and combinations thereof, but is not limited thereto.

Specifically, Al ₂ O ₃ , SiO ₂ , ZnO, ZrO ₂ , BaTiO ₃ , TiO ₂ , Ta ₂ O ₅ , Ti ₃ O ₅ , ITO, IZO, ATO, ZnO-Al, Nb ₂ O ₃ , SnO, MgO and One selected from the group consisting of combinations thereof is possible. If necessary, a material surface-treated with a compound having an unsaturated bond such as acrylate may be used.

However, when the light conversion resin composition according to the present invention includes scattering particles, it is preferable to increase the path of light emitted from the quantum dots through the scattering particles to increase the overall light efficiency in the light conversion coating layer.

Preferably, the scattering particles may have an average particle diameter of 30 to 1000 nm, preferably in the range of 100 to 500 nm, more preferably in the range of 150 nm to 300 nm. At this time, if the particle size is too small, a sufficient scattering effect of light emitted from the quantum dots cannot be expected. use it

The scattering particles may be used in an amount of 0.5 to 20 parts by weight, preferably 1 to 15 parts by weight, based on 100 parts by weight of the total solid component of the light conversion resin composition. When the scattering particles are included within the above range, the effect of increasing the luminescence intensity can be maximized, which is preferable. When the scattering particles are included below the above range, it may be somewhat difficult to secure the desired luminous intensity, and when the above range is exceeded, the transmittance of blue irradiated light is significantly lowered, which may cause a problem in color reproducibility. It is preferable to use it appropriately.

heat-cured resin

The light conversion resin composition according to the present invention may further include a thermally polymerizable resin. The thermally polymerized resin not only has excellent surface hardness and adhesion of the coating film, but also has excellent reliability by suppressing deterioration of quantum dots in high temperature and high humidity conditions.

The thermal polymerization resin may include at least one selected from the group consisting of a polyfunctional alicyclic epoxy resin, a novolak epoxy resin, and a silane-modified epoxy resin.

The polyfunctional alicyclic epoxy resin may include a compound represented by the following Chemical Formula 7 or 8.

[Formula 7]

(In Formula 7,

R is a C1 to C10 alkyl group,

r, s and p are each independently an integer from 1 to 20).

[Formula 8]

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", 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", etc. may be used, but is not limited thereto.

By using the polyfunctional alicyclic epoxy resin, it is possible to improve reliability by suppressing deterioration of quantum dots as well as excellent in surface hardness and adhesion of the coating film.

The novolak epoxy resin may include a compound represented by the following Chemical Formula 9.

[Formula 9]

(In Formula 9, v is an integer of 1 to 20).

As a commercially available product of the novolak 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 epoxy resin, the surface hardness and adhesion of the coating film are excellent, and the elastic recovery rate in a high temperature process is excellent, and deterioration of quantum dots can be suppressed.

The silane-modified epoxy resin may be prepared by a dealcoholization condensation reaction between a hydroxyl group-containing epoxy resin and an alkoxysilane.

The hydroxyl group-containing epoxy resin may include a compound represented by the following Chemical Formula 10.

[Formula 10]

(In Formula 10, x is an integer from 1 to 34).

thermosetting agent

The light conversion resin composition according to the present invention may further include a thermosetting agent.

The thermosetting agent can prevent the quantum dots from being oxidized and discolored during the high-temperature process, and due to the improvement of the degree of curing in the coating film, it can be expected that the light efficiency is prevented from lowering in the long-term evaluation of the resistance to blue light.

The thermosetting agent may include a compound represented by the following Chemical Formula 11.

[Formula 11]

In Formula 17,

Rs is hydrogen or a C1 to C12 alkyl group, Rp is a C1 to C12 alkylene group, Rq is an n-valent aliphatic hydrocarbon group with or without atoms other than carbon, and t is an integer of 2 to 4.

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.

The alkylene group is a divalent substituent of the alkyl group, for example, a methylene group, an ethylene group, a propylene group, a butylene group, a pentylene group, a hexylene group, a xylene group, an epthylene group, an octylene group, a nonylene group, a decanylene group. , an undecanylene group, a dodecanylene group, a tridecanylene group, a tetradecanylene group, a hexadecanylene group, a heptadecanylene group, or a nonadecanylene group, but is not limited thereto.

In this case, the thermosetting agent may include one or more of the compounds represented by the following Chemical Formulas 12 to 19.

[Formula 12]

[Formula 13]

[Formula 14]

[Formula 15]

[Formula 16]

[Formula 17]

[Formula 18]

[Formula 19]

By including the thermosetting agent, resistance to blue light after thermosetting may be improved.

The light conversion resin composition according to an embodiment of the present invention may further include the above-described thermal polymerization resin and/or a thermal curing agent, thereby providing excellent high temperature and moisture resistance effect.

additive

The light change resin composition according to the present invention may further include additives such as other surfactants, adhesion promoters, antioxidants, ultraviolet absorbers, and aggregation inhibitors, if necessary.

As said surfactant, commercially available surfactant can be used, For example, surfactant, such as silicone type, fluorine type, ester type, cationic type, anionic type, nonionic type, amphoteric type, etc. are mentioned. These may be used individually or in combination of 2 or more types, respectively.

As said surfactant, for example, polyoxyethylene alkyl ethers, polyoxyethylene alkyl ethers, polyethylene glycol diesters, sorbitan fatty esters, fatty acid modified polyesters, tertiary amine modified polyurethanes , polyethyleneimines, etc., in addition to 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 Co., Ltd.), Asahi guard, Surflon (above, manufactured by Asahi Glass Co., Ltd.), brush SOLSPERSE (manufactured by Zeneca Corporation), EFKA (manufactured by EFKA Chemicals Corporation), 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-tert-butyl-2-hydroxy-5-methylphenyl)-5-chlorobenzothiazole and alkoxybenzophenone.

Specific examples of the aggregation inhibitor include sodium polyacrylate.

The additive may be appropriately added and used as needed in 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 parts by weight, preferably 0.1 to 10 parts by weight, more preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the blue photosensitive resin composition, but is not limited thereto.

< Light conversion laminated substrate >

In addition, the present invention provides a light conversion laminated substrate comprising the above-described light conversion resin composition.

The light conversion laminated substrate may include a substrate and a light conversion resin layer formed on the substrate. The substrate may be, for example, glass, silicon oxide (SiOx) or a polymer substrate, preferably glass. The polymer substrate may be, for example, polyethersulfone (PES) or polycarbonate (PC).

The light conversion resin layer is a layer including the light conversion resin composition of the present invention, and may be a layer formed by applying the light conversion resin composition to a substrate by spin coating and thermosetting.

When applied to a cosmetic display device, the light conversion laminated substrate including the above-described substrate and light conversion resin layer has a simpler structure than the conventional liquid crystal display device shown in FIG. Long-term reliability can provide an excellent effect.

< Image display device >

In addition, the present invention provides an image display device including the light conversion laminated substrate.

The light conversion laminated substrate of the present invention can be applied to various image display devices such as an electroluminescence display device, a plasma display device, and a field emission display device as well as a general liquid crystal display device.

The image display device of the present invention includes a plurality of quantum dots, a binder resin, and a solvent, wherein the plurality of quantum dots are two or more types of quantum dots having different central emission wavelengths (λmax) A light change laminated substrate manufactured using a light conversion resin composition may include In this case, in the plurality of quantum dots, the difference between the central emission wavelength (λmax) and the full width at half maximum of the first quantum dot and the second quantum dot satisfies a specific range; And/or it may include at least one of a thermopolymerizable resin and a thermosetting agent.

The image display device of the present invention can provide a high-quality cosmetic display device having a simple structure, excellent luminance, and long-term reliability in a high temperature and high humidity state by using a laminated substrate on which a light conversion resin composition is laminated.

Hereinafter, examples and comparative examples will be given in detail to explain the present invention in detail. However, the Examples and Comparative Examples 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 Examples and Comparative Examples described below. Examples and comparative examples 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.

<Quantum dot synthesis>

Synthesis Example 1: Synthesis of Green Quantum Dots (Quantum Dot-11)

0.4 mmol (0.058 g) of indium acetate, 0.6 mmol (0.15 g) of palmitic acid, and 20 mL of 1-octadecene were placed in a reactor and heated to 120 °C under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen. After heating to 300° C., a mixed solution of 0.2 mmol (58 μl) of tris (trimethylsilyl) phosphine (TMS3P) and 1.0 mL of trioctylphosphine was quickly injected and reacted for 1 minute.

Then, 2.4 mmol of zinc acetate (0.448 g), 4.8 mmol of oleic acid and 20 mL of trioctylamine were placed in a reactor and heated to 120° C. under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the temperature of the reactor was raised to 280°C. 2 ml of the previously synthesized InP core solution was added, and then 4.8 mmol of selenium (Se/TOP) in trioctylphosphine was added, and the final mixture was reacted for 90 minutes. Ethanol was added to the reaction solution cooled quickly to room temperature, and the precipitate obtained by centrifugation was filtered under reduced pressure and dried under reduced pressure to form an InP/ZnSe core-shell.

Then, 2.4 mmol of zinc acetate (0.448 g), 4.8 mmol of oleic acid and 20 mL of trioctylamine were placed in a reactor and heated to 120° C. under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the temperature of the reactor was raised to 280°C. 2 ml of the previously synthesized InP core solution was added, followed by 4.8 mmol of sulfur (S/TOP) in trioctylphosphine, and the final mixture was reacted for 2 hours. Ethanol was added to the reaction solution rapidly cooled to room temperature, and the precipitate obtained by centrifugation was filtered under reduced pressure and dried under reduced pressure to obtain quantum dots 11 having an InP/ZnSe/ZnS core-shell structure.

The maximum emission peak of the photoluminescence spectrum of the obtained nano quantum dots was 530 nm, and the half width was 38 nm.

Synthesis Example 2: Synthesis of Red Quantum Dots (Quantum Dot-12)

0.2 mmol (0.058 g) of indium acetate, 0.6 mmol (0.15 g) of palmitic acid, and 10 mL of 1-octadecene were placed in a reactor and heated to 120° C. under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen. After heating to 280° C., a mixed solution of 0.1 mmol (29 uL) of tris (trimethylsilyl) phosphine (TMS3P) and 0.5 mL of trioctylphosphine was rapidly injected and reacted for 15 minutes. Acetone was added to the reaction solution rapidly cooled to room temperature, and the precipitate obtained by centrifugation was dispersed in toluene. The obtained InP semiconductor nanocrystals exhibited a UV first absorption maximum wavelength of 560 to 590 nm.

1.2 mmol of zinc acetate (0.224 g), 2.4 mmol of oleic acid, and 10 mL of trioctylamine were placed in a reactor and heated to 120° C. under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the temperature of the reactor was raised to 280°C. 1 mL of the previously synthesized InP core solution was added, and then 2.4 mmol of S (sulfur)/TOP (trioctylphosphine) was added, and the final mixture was reacted for 2 hours. Ethanol was added to the reaction solution rapidly cooled to room temperature and centrifuged to obtain quantum dots 12 having an InP (core)/ZnS (shell) structure with an emission wavelength of 625 nm and a half width of 40 nm.

The maximum emission wavelength and full width at half maximum of the quantum dots 11 and 12 were measured using QE-2100 (manufactured by Otsuka Corporation).

<Synthesis of binder resin>

Synthesis Example 3 : Synthesis of cardo-based binder resin (C-1)

364.4 g of 3,6'-dihydroxyspiro (fluorene-9,9-xantene) and 0.4159 g of t-butylammonium bromide in a 3000 ml three-necked round flask were mixed, 2359 g of epichlorohydrin was added, and reacted by heating at 90° C. When 3,6-dihydroxyspiro (fluorene-9,9-xanthene) is completely consumed by liquid chromatography analysis, the temperature is heated to 30° C. After cooling, a 50% aqueous NaOH solution (3 equivalents) was slowly added.When epichlorohydrin was completely consumed by liquid chromatography analysis, the mixture was extracted with dichloromethane, washed with water 3 times, and the organic layer was dried over magnesium sulfate and then dichloromethane was distilled under reduced pressure and recrystallized using a mixture of dichloromethane and methanol 50:50.

1 equivalent of the thus synthesized epoxy compound, 0.004 equivalents of t-butylammonium bromide, 0.001 equivalents of 2,6-diisobutylphenol, and 2.2 equivalents of acrylic acid were mixed, and then 24.89 g of propylene glycol monomethyl ether acetate was added and mixed. The reaction solution was dissolved by heating at a temperature of 90 to 100°C while blowing air at a rate of 25 ml/min. In a state in which the reaction solution was cloudy, the temperature was heated to 120° C. to completely dissolve it. When the solution became transparent and the viscosity increased, the acid value was measured and stirred until the acid value became less than 1.0 mgKOH/g. It took 11 hours for the acid value to reach the target (0.8). After completion of the reaction, the temperature of the reactor was lowered to room temperature to obtain a colorless and transparent compound of Chemical Formula 26.

[Formula 26]

Thereafter, 600 g of propylene glycol monomethyl ether acetate was added and dissolved in 307.0 g of the compound of Formula 26, 78 g of biphenyltetracarboxylic dianhydride and 1 g of tetraethyl ammonium bromide were mixed, and the temperature was gradually raised at 110 to 115° C. for 4 hours. reacted while After confirming the disappearance of the acid anhydride group, 38.0 g of 1,2,3,6-tetrahydrophthalic anhydride was mixed and reacted at 90° C. for 6 hours to polymerize cardo-based binder resin C-1. The disappearance of the anhydride was confirmed by the IR spectrum. The molecular weight of the prepared cardo-based binder resin was measured with the following apparatus, and the weight average molecular weight was 3,500 g/mol.

Device: HLC-8120GPC (manufactured by Toso Co., Ltd.)

Column: TSK-GELG4000HXL + TSK-GELG2000HXL (serial connection)

Column temperature: 40°C

Mobile phase solvent: tetrahydrofuran

Flow rate: 1.0 ml/min

Injection volume: 50 μl

Detector: RI

Measurement sample concentration: 0.6 mass % (solvent = tetrahydrofuran)

Standard materials for calibration: TSK STANDARD POLYSTYRENE F-40, F-4, F-1, A-2500, A-500 (manufactured by Tosoh Corporation)

Ratio of the weight average molecular weight and number average molecular weight obtained above was made into molecular weight distribution (Mw/Mn).

Synthesis Example 4: Synthesis of acrylic binder resin (C-2)

A flask equipped with a stirrer, a thermometer reflux cooling tube, a dropping funnel and a nitrogen introduction tube was prepared, and as a monomer dropping funnel, 74.8 g (0.20 mole) of benzylmaleimide, 43.2 g (0.30 mole) of acrylic acid, and 118.0 of vinyltoluene were prepared. g (0.50 mol), 4 g of t-butylperoxy-2-ethylhexanoate, and 40 g of propylene glycol monomethyl ether acetate (PGMEA) were added and prepared by stirring and mixing, and as a chain transfer agent dropping tank, n-dodecanthiol 6g, PGMEA 24g was put, and what stirred and mixed was prepared. Then, 395 g 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. The dropping proceeds for 2 h while maintaining 90 ° C, and after 1 h, the temperature is raised to 110 ° C and maintained for 3 h, and then a gas introduction tube is introduced to bubbling the oxygen/nitrogen = 5/95 (v/v) mixed gas. started Next, 28.4 g of glycidyl methacrylate [(0.10 mol), (33 mol% based on the carboxyl group of acrylic acid used in this reaction)], 2,2'-methylenebis(4-methyl-6-t-butylphenol) ) 0.4 g and 0.8 g of triethylamine were put into the flask, and the reaction was continued at 110° C. for 8 hours to obtain an acrylic resin C-4 having a solid content acid value of 70 mgKOH/g. The weight average molecular weight in terms of polystyrene measured by GPC was 16,000 g/mol, and the molecular weight distribution (Mw/Mn) was 2.3.

Examples and Comparative Examples

Light conversion resin compositions of Examples 1 to 15 and Comparative Examples 1 to 9 were prepared as shown in Tables 2 and 3 below. Among the components constituting the light conversion resin compositions of Examples 1 to 15 and Comparative Examples 1 to 9, the content of each solid component with respect to the total solid component except for the solvent is shown in Tables 4 to 5.

The binder resin used was made in Synthesis Examples 3 and 4, respectively, and the scattering particles were TiO ₂ particles and TR-88 (220 nm) manufactured by Huntsman Corporation. Further, the thermally polymerized resin (E) was EHPE-3150 manufactured by Daicel Chemical Industries, Ltd., and the compound represented by the general formula (16) was used as the thermal curing agent (F).

Quantum dots and solvents used in Examples and Comparative Examples are shown in Tables 6 and 7.

division
(Unit: parts by weight) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Example 12 Example 13 Example 14 Example 15 (A) Quantum dots Quantum Dot 1 Quantum dots 2 0.6 Quantum Dot 3 0.5 0.6 4 4 0.6 0.6 Quantum dots 4 Quantum dots 5 Quantum dots 6 0.125 0.15 One One 0.15 Quantum dots 7 0.15 Quantum dots 8 0.15 Quantum dots 9 Quantum dots 10 Quantum Dot 11 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 Quantum dots 12 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 (B) binder resin C-1 48.375 28.65 7 2 24.5 15.5 5.5 15.5 15.5 15.5 15.5 15.5 11.5 12 9.5 C-2 7 2 4.15 13.15 23.15 13.15 13.15 13.15 13.15 13.15 10.15 11.15 6.15 (D) Scattering particles One 0.6 One One 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 (E) thermally polymerized resin 7 7 (F) thermosetting agent 5.5 6 (C) solvent Solvent-1 50 70 80 90 70 70 70 70 70 70 70 Solvent-2 70 Solvent-3 70 Solvent-4 70 Solvent-5 70

division
(Unit: parts by weight) Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 (A) Quantum dots Quantum Dot 1 0.6 Quantum dots 2 0.6 Quantum Dot 3 0.75 0.6 0.35 5 Quantum dots 4 Quantum dots 5 0.15 0.15 Quantum dots 6 0.75 0.15 0.15 0.1 1.25 Quantum dots 7 Quantum dots 8 Quantum dots 9 0.6 0.6 Quantum dots 10 0.15 Quantum Dot 11 Quantum dots 12 (B) binder resin C-1 15.5 15.5 15.5 15.5 15.5 15.5 15.5 36.05 2.25 C-2 13.15 13.15 13.15 13.15 13.15 13.15 13.15 12.5 0.5 (D) Scattering particles 0.6 0.6 0.6 0.6 0.6 0.6 0.6 One One (C) solvent Solvent-1 70 70 70 70 70 70 70 50 90 Solvent-2 Solvent-3 Solvent-4 Solvent-5

division
(based on solid content)
(Unit: parts by weight) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Example 12 Example 13 Example 14 Example 15 (A) Quantum dots Quantum Dot 1 Quantum dots 2 2 Quantum Dot 3 One 2 20 40 2 2 Quantum dots 4 Quantum dots 5 Quantum dots 6 0.25 0.5 5 10 0.5 Quantum dots 7 0.5 Quantum dots 8 0.5 Quantum dots 9 Quantum dots 10 Quantum Dot 11 2 2 2 2 2 2 2 2 Quantum dots 12 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 (B) binder resin C-1 96.75 95.5 35 20 81.67 57.17 18.3 51.7 51.7 51.7 51.7 51.7 38.4 40 31.7 C-2 35 20 13.83 38.33 77.2 43.8 43.8 43.8 43.8 43.8 33.8 37.2 20.5 (D) Scattering particles 2 2 5 10 2 2 2 2 2 2 2 2 2 2 2 (E) thermally polymerized resin 23.3 23.3 (F) thermosetting agent 18.3 20

division
(based on solid content)
(Unit: parts by weight) Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 (A) Quantum dots Quantum Dot 1 2 Quantum dots 2 2 Quantum Dot 3 2.5 2 0.7 50 Quantum dots 4 Quantum dots 5 0.5 0.5 Quantum dots 6 0 2.5 0.5 0.5 0.2 12.5 Quantum dots 7 Quantum dots 8 Quantum dots 9 2 2 Quantum dots 10 0.5 Quantum Dot 11 Quantum dots 12 (B) binder resin C-1 51.7 51.7 51.7 51.7 51.7 51.7 51.7 72.1 22.5 C-2 43.8 43.8 43.8 43.8 43.8 43.8 43.8 25 5 (D) Scattering particles 2 2 2 2 2 2 2 2 2

division product name manufacturing company Central excitation wavelength (nm) Full width at half maximum (nm) (A) Quantum dots Quantum Dot 1 Lumidot™ 480 Product made in Aldrich company 480 40 Quantum dots 2 Lumidot™ 510 Product made in Aldrich company 510 40 Quantum Dot 3 Lumidot™ 530 Product made in Aldrich company 530 40 Quantum dots 4 Lumidot™ 560 Product made in Aldrich company 560 40 Quantum dots 5 Lumidot™ 590 Product made in Aldrich company 590 40 Quantum dots 6 Lumidot™ 610 Product made in Aldrich company 610 40 Quantum dots 7 CZ620-25 Product made in NN-LABS company 620 35 Quantum dots 8 CZ640-25 Product made in NN-LABS company 640 35 Quantum dots 9 INP530-25 Product made in NN-LABS company 530 70 Quantum dots 10 INP620-25 Product made in NN-LABS company 620 70 Quantum Dot 11 Synthesis Example -1 530 38 Quantum dots 12 Synthesis Example -2 625 40

division Propylene Glycol Methyl Ether Acetate Ethylene glycol monoethyl ether acetate Cyclohexanone Propylene Glycol n-Butyl Ether
Chloroform Polarity boiling point
(℃) (C) solvent Solvent-1 One 5.6 146 Solvent-2 One 4.7 156 Solvent-3 One 6.3 155.6 Solvent-4 One 4.2 171℃ Solvent-5 0.7 0.3 4.8 120.56

Preparation Example 1 . Light conversion coating layer manufacturing

A coating film was prepared using the light conversion resin composition prepared in Examples and Comparative Examples. That is, each of the above photoconversion resin compositions was applied on a 5 cm × 5 cm glass substrate by spin coating, placed on a heating plate and maintained at a temperature of 100° C. for 10 minutes to form a thin film, and then in a heating oven at 180° C. for 30 minutes. A light conversion coating layer was prepared by heating. The thickness of the photoconversion resin film prepared above was manufactured to a thickness of 2um to 20um depending on the content of quantum dots.

Experimental Example 1. Evaluation of color reproducibility

The prepared coating film is placed on a blue light source (XLamp XR-E LED, Royal blue 450 illuminance 3mW/cm2, Cree Corporation), and a color filter substrate (UN65, Samsung Electronics TV Color) patterned with Red, Green, and Blue is placed on it. filter), and then using a colorimeter (OSP-200, Olympus), the color coordinates of Red, Green, and Blue were measured, and the area ratio of the color reproduction area expressed at this time to the NTSC color area ratio was calculated. The evaluation method is described in [Table 8] below, and the evaluation result is described in [Table 9] below.

The higher the area ratio, the better the color reproducibility.

Evaluation items Assessment Methods Measurement conditions / equipment Color reproducibility (% compared to NTSC) Calculation of color reproducibility after measuring R, G, B pixel color coordinates OSP-200 spectrum meter

Experimental Example 2. Evaluation of high temperature and high humidity resistance

After placing the prepared coating film on a blue light source (XLamp XR-E LED, Royal blue 450 illuminance 3mW/cm ² , Cree Corporation), the luminance was measured using a luminance meter (CAS140CT Spectrometer, Instrument systems), and the same After exposing the coating film for 250 hours in a high-temperature and high-humidity processing device (TH-PE manufactured by Jeotech) at a temperature of 80°C and a humidity of 85%, the luminance is measured in the same manner as above, and the luminance retention rate before/after high-temperature and high-humidity treatment is calculated. The high temperature and high humidity resistance was evaluated.

High temperature and humidity resistance (%) = (temperature 80℃, humidity 85%, brightness after 250 hours treatment)/(temperature 80℃, humidity 85%, brightness before 250 hours treatment)×100

Evaluation results Color reproducibility (% compared to NTSC) High temperature and humidity resistance (%) Example 1 98% 83% Example 2 98% 82% Example 3 99% 85% Example 4 99% 86% Example 5 99% 84% Example 6 98% 86% Example 7 97% 85% Example 8 99% 85% Example 9 98% 86% Example 10 98% 85% Example 11 97% 83% Example 12 99% 86% Example 13 98% 90% Example 14 98% 91% Example 15 98% 93% Comparative Example 1 5% 85% Comparative Example 2 6% 86% Comparative Example 3 85% 83% Comparative Example 4 88% 84% Comparative Example 5 60% 84% Comparative Example 6 56% 86% Comparative Example 7 59% 85% Comparative Example 8 83% 84% Comparative Example 9 72% 83%

As can be seen in the above table, the light conversion resin compositions of Examples 1 to 15 exhibit excellent color reproducibility and high temperature and humidity resistance, and in particular, the light conversion resins of Examples 13 to 15 including a thermal polymerization resin and/or a thermosetting agent The composition exhibited remarkably excellent high-temperature and high-humidity resistance. On the other hand, it was confirmed that the light conversion resin compositions of Comparative Examples 1 to 9 had lower color reproducibility.

Claims (11)

A light conversion resin composition comprising a plurality of quantum dots, a binder resin, and a solvent,
The plurality of quantum dots are two or more kinds of quantum dots having different central emission wavelengths (λmax), a difference between the central emission wavelengths (λmax) of the first quantum dots and the second quantum dots is 70 nm or more, and the half widths of the first quantum dots and the second quantum dots are 45 nm or less is,
The first quantum dot has a central emission wavelength of 510 to 540 nm,
The second quantum dot has a central emission wavelength of 610 to 640 nm,
The plurality of quantum dots is 1 to 60 parts by weight based on the total weight of the solid content of the light conversion resin composition,
The binder resin has a cardo-based resin as an essential component, and further includes an acrylic resin,
The light conversion resin composition, characterized in that the color gamut of the coating film formed of the composition is 97% or more compared to the NTSC color gamut. The method according to claim 1,
The solvent is included in an amount of 45 to 90 parts by weight based on 100 parts by weight of the total photopolymerization composition, and the polarity of the solvent is 4 to 7 light conversion resin composition. 3. The method according to claim 2,
The boiling point of the solvent is 100 ℃ to 200 ℃ light conversion resin composition. delete delete The method according to claim 1,
Light conversion resin composition further comprising scattering particles. 7. The method of claim 6,
The scattering particles are metal oxides, light conversion resin composition. 8. The method of claim 7,
The metal oxide is Al ₂ O ₃ , SiO ₂ , ZnO, ZrO ₂ , BaTiO ₃ , TiO ₂ , Ta ₂ O ₅ , Ti ₃ O ₅ , ITO, IZO, ATO, ZnO-Al, Nb ₂ O ₃ , SnO, A light conversion resin composition comprising at least one selected from the group consisting of MgO and combinations thereof. A light conversion laminated substrate comprising the light conversion resin composition according to any one of claims 1 to 3 and 6 to 8. The method according to claim 9, The material of the light conversion laminated substrate is glass, the light conversion laminated substrate. An image display device comprising the light conversion laminated substrate of claim 10 .

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