Display device

Abstract

To provide a display device which comprises a light source, a color conversion layer, and a color filter and offers both a wide color gamut and good extraction efficiency.SOLUTION: A display device is provided, comprising a light source (A), a color conversion layer (B), and a color filter (C), where the color conversion layer (B) contains quantum dots (B-r) that emit red light, and the color filter (C) comprises a blue color filter (C-b), a green color filter (C-g), and a red color filter (C-r). The display device satisfies conditions expressed as: α≤1.80 and β≥63.0.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a display device including a light source, a color conversion layer, and a color filter. [Background technology]

[0002] Patent Document 1 proposes a display device that includes a light conversion section containing quantum dots that emit green light, and a green color filter.

[0003] Patent Document 2 proposes a display device including a film made of a mixture of a luminescent perovskite compound and a luminescent indium compound or a luminescent cadmium compound. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2015 / 045735 [Patent Document 2] International Publication No. 2018 / 168638 Summary of the Invention [Problem to be solved by the invention]

[0005] In conventionally proposed display devices each including a light source, a color conversion layer, and a color filter, it has not always been possible to simultaneously obtain a wide color gamut and excellent light extraction efficiency.

[0006] An object of the present invention is to achieve both a wide color gamut and high light extraction efficiency in a display device that includes a light source, a color conversion layer, and a color filter. [Means for solving the problem]

[0007] The present invention provides the following display device. [1] A display device comprising a light source (A), a color conversion layer (B), and a color filter (C), the color conversion layer (B) contains quantum dots (Br) that emit red light, the color filter (C) has a blue color filter (Cb), a green color filter (Cg), and a red color filter (Cr), A display device that satisfies the following conditions (I) and (II): (I) α≦1.80 (II) β≧63.0 [however, α=α b +α g +α r , β=β b +β g +β r Let's say. In the spectral curve I(x) obtained by plotting the intensity I of light emitted from the color conversion layer (B) when irradiated with light from the light source (A) against the wavelength x, Wavelength range: 380nm≦x<440nm, 460nm <x<520nm、540nm<x<620nm及び650nm<x≦780nmにおいて0となり、波長範囲440nm≦x≦460nm、520nm≦x≦540nm及び620nm≦x≦650nmにおいて前記スペクトル曲線I(x)の最大強度と等しい値となるパルス関数を関数f(x)で表すとき、 α b represents the proportion of the area of the spectral curve I(x) that does not overlap with the area of the function f(x) in the wavelength range 380 nm≦x<495, α g represents the proportion of the area of the spectral curve I(x) that does not overlap with the area of the function f(x) in the wavelength range 495 nm≦x≦585, α r wavelength range 585nm <x≦780において、前記スペクトル曲線I(x)の領域における関数f(x)の領域と重ならない領域の割合を示す。 Light transmittance T of blue color filter (Cb) b The spectral curve T obtained by plotting b (x), Light transmittance T of green color filter (Cg) g The spectral curve T obtained by plotting g (x), and Light transmittance T of red color filter (Cr) r The spectral curve T obtained by plotting r In (x), Wavelength range: 380nm≦x<440nm, 460nm <x<520nm、540nm<x<620nm及び650nm<x≦780nmにおいて0となり、波長範囲440nm≦x≦460nm、520nm≦x≦540nm及び620nm≦x≦650nmにおいて光線透過率100%となるパルス関数を関数g(x)で表すとき、 β b is the spectral curve T in the wavelength range 440 nm≦x≦460 nm. b indicates the area of the overlapping region between the region of (x) and the region of the function g(x), β g is the spectral curve T in the wavelength range 520 nm≦x≦540 nm. g indicates the area of the overlapping region between the region of (x) and the region of the function g(x), β r is the spectral curve T in the wavelength range 620 nm≦x≦650 nm. r This shows the area of the overlapping region between the domain of (x) and the domain of the function g(x). [2] The display device according to [1], wherein the light source (A) emits light having a peak at a wavelength of 600 nm or less. [3] The display device according to [1] or [2], wherein the light emitted from the color conversion layer (B) when irradiated with light from the light source (A) is white light. [4] The display device according to any one of [1] to [3], wherein the spectral curve I(x) has peaks in the wavelength ranges of 440 nm to 460 nm, 520 nm to 540 nm, and 620 nm to 650 nm, and the full width at half maximum of each peak is 20 nm to 80 nm. [5] The display device according to any one of [1] to [4], wherein the quantum dots (B-r) that emit red light include at least one selected from the group consisting of particles of an indium compound and particles of a cadmium compound. [6] The display device according to any one of [1] to [5], wherein the thickness of the color conversion layer (B) is 1 μm or more and 300 μm or less. [7] The spectral curve T b (x) has a peak in the wavelength range of 440 nm to 460 nm, and is the display device according to any one of [1] to [6]. [8] The spectral curve T g (x) has a peak in the wavelength range of 520 nm to 540 nm, and is the display device according to any one of [1] to [7]. [9] The spectral curve T r (x) has a peak in the wavelength range of 620 nm to 650 nm, and is the display device according to any one of [1] to [8].

[10] The display device according to any one of [1] to [9], wherein the coverage rate of the color gamut of Rec.ITU-R BT.2020 is 54% or more and the extraction efficiency is 32% or more.

[11] A display including the display device according to any one of [1] to

[10] .

Advantages of the Invention

[0008] According to the present invention, in a display device including a light source, a color conversion layer, and a color filter, it is possible to achieve both a wide color gamut and excellent extraction efficiency.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0010] <Display device> The display device includes a light source (A), a color conversion layer (B), and a color filter (C). The display device is a device that irradiates light from the light source (A) onto the color conversion layer (B), emits light from the quantum dots (B-r) that emit red light (hereinafter also simply referred to as quantum dots (B-r)) by irradiating the light emitted from the color conversion layer (B) onto the color conversion layer (B), and extracts the light through the color filter (C).

[0011] "Emitting blue light" means emitting all light that is visually recognized as blue (all light having intensity in the blue wavelength region, for example, 380 nm to 495 nm), and is not limited to emitting light of a single wavelength. "Emitting green light" means emitting all light that is visually recognized as green (all light having intensity in the green wavelength region, for example, 495 nm to 585 nm), and is not limited to emitting light of a single wavelength. "Emitting red light" means emitting all light that is visually recognized as red (all light having intensity in the red wavelength region, for example, 585 nm to 780 nm), and is not limited to emitting light of a single wavelength.

[0012] The display device may include layers such as a light guide plate, a reflection film, a diffusion film, a brightness enhancement part, a prism sheet, and a medium material layer between elements, which will be described later.

[0013] The display device can achieve both a wide color gamut and excellent extraction efficiency when simultaneously satisfying the following conditions (I) and (II). In a display device equipped with a conventionally proposed light source, a color conversion layer, and a color filter, it is often difficult to achieve both a wide color gamut and excellent extraction efficiency. This is because the blue, green, and red light obtained by passing through the color filter may each contain light of intermediate wavelengths, making it difficult to fully exhibit color reproducibility. On the other hand, if light of such intermediate wavelengths is excluded, the luminance decreases and the extraction efficiency becomes insufficient. As a result of research, it has been found that by setting a specific pulse function, the smaller the ratio of the area of the spectral curve of the light emitted from the color conversion layer that extends beyond the area of the pulse function, and the higher the ratio of the area of the spectral curve of the transmitted light from the color filter that covers the area of the pulse function, the easier it is to exclude light of intermediate wavelengths and the easier it is to obtain high luminance.

[0014] <Condition (I)> Condition (I) will be described with reference to FIG. 1. FIG. 1(a) shows the pulse function f(x), FIG. 1(b) shows the spectral curve I(x) of the light emitted from the color conversion layer (B), and FIG. 1(c) shows the non-overlapping regions 10, 20, and 30 of the region of the pulse function f(x) in the region of the spectral curve I(x) as hatched areas. In FIG. 1(c), the non-overlapping region 10 is the region of α b and the non-overlapping region 20 is the region of α g and the non-overlapping region 30 is the region of α r . The region of the spectral curve I(x) is the region between the spectral curve and the horizontal axis, and the region of the pulse function f(x) is the region between the waveform of the pulse function f(x) and the horizontal axis.

[0015] α b 、α g and α rWhen the sum of these is defined as α, α≦1.80, and from the viewpoint of color gamut and extraction efficiency, α≦1.60 is preferred, α≦1.45 is more preferred, α≦1.40 is even more preferred, α≦1.35 is particularly preferred, α≦1.30 is even more preferred, α≦1.25 is still more preferred, and α is usually 0.50≦α. b , α g and α r is preferably 0.80 or less, and more preferably 0.60 or less. α can be calculated according to [Equation 2] shown in the Examples section below.

[0016] The pulse function f(x) is in the wavelength range 380 nm ≦ x < 440 nm, 460 nm <x<520nm、540nm<x<620nm及び650nm<x≦780nmにおいて0となり、波長範囲440nm≦x≦460nm、520nm≦x≦540nm及び620nm≦x≦650nmにおいてスペクトル曲線I(x)の最大強度と等しい値となる関数であり、色域及び取出し効率の観点から好ましくは、波長範囲380nm≦x<445nm、460nm<x<525nm、535nm<x<630nm及び650nm<x≦780nmにおいて0となり、波長範囲445nm≦x≦460nm、525nm≦x≦535nm及び630nm≦x≦650nmにおいてスペクトル曲線I(x)の最大強度と等しい値となる。

[0017] The light emitted from the color conversion layer (B) when irradiated with light from the light source (A) is preferably white light. From the viewpoint of color gamut and extraction efficiency, the spectral curve I(x) preferably has peaks in the wavelength ranges of 440 nm to 460 nm, 520 nm to 540 nm, and 620 nm to 650 nm, with full widths at half maximum of each peak being 20 nm to 80 nm, and more preferably has peaks in the wavelength ranges of 445 nm to 455 nm, 525 nm to 535 nm, and 625 nm to 645 nm, with full widths at half maximum of each peak being 20 nm to 50 nm. The spectral curve I(x) is measured by the method described in the Examples section below. The full widths at half maximum of the peaks of the spectral curve I(x) are more preferably 20 nm to 40 nm, and particularly preferably 20 nm to 30 nm.

[0018] <Condition (II)> Condition (II) will be explained using a green color filter (Cg) as an example with reference to FIG. 2. FIG. 2(a) shows the pulse function g(x), and FIG. 2(b) shows the spectral curve T of the green color filter (Cg). g (x), and Fig. 2(c) shows the spectral curve T g The area β of the region 40 where the region of (x) and the region of the pulse function g(x) overlap g The same applies to the blue color filter (Cb) and the red color filter (Cr). g The domain of (x) is the area between the spectral curve and the horizontal axis, and the domain of the pulse function g(x) is the area between the waveform of the pulse function g(x) and the horizontal axis.

[0019] The color filter (C) is β b , β g and β r When the sum of these is defined as β, β≧63.0, and from the viewpoint of color gamut and extraction efficiency, β≧63.5 is preferred, β≧64.0 is more preferred, β≧64.5 is even more preferred, β≧65.0 is particularly preferred, and β≦70.0 is usually satisfied. b , β g and βr It is preferable that all of them are 10 or more, and more preferably 15 or more. β can be calculated according to [Equation 3] shown in the Examples section described later.

[0020] The pulse function g(x) becomes 0 in the wavelength ranges of 380 nm ≤ x < 440 nm, 460 nm < x < 520 nm, 540 nm < x < 620 nm, and 650 nm < x ≤ 780 nm, and becomes 100% in the wavelength ranges of 440 nm ≤ x ≤ 460 nm, 520 nm ≤ x ≤ 540 nm, and 620 nm ≤ x ≤ 650 nm. From the viewpoints of color gamut and extraction efficiency, preferably, it becomes 0 in the wavelength ranges of 380 nm ≤ x < 445 nm, 455 nm < x < 525 nm, 535 nm < x < 625 nm, and 645 nm < x ≤ 780 nm, and becomes 100% in the wavelength ranges of 445 nm ≤ x ≤ 455 nm, 525 nm ≤ x ≤ 535 nm, and 625 nm ≤ x ≤ 645 nm.

[0021] Spectral curve T b (x) preferably has a peak in the wavelength range of 440 nm to 460 nm from the viewpoints of color gamut and extraction efficiency, and more preferably has a peak in the wavelength range of 445 nm to 455 nm.

[0022] Spectral curve T g (x) preferably has a peak in the wavelength range of 520 nm to 540 nm from the viewpoints of color gamut and extraction efficiency, and more preferably has a peak in the wavelength range of 525 nm to 535 nm.

[0023] Spectral curve T r (x) preferably has a peak in the wavelength range of 620 nm to 650 nm from the viewpoints of color gamut and extraction efficiency, and more preferably has a peak in the wavelength range of 625 nm to 645 nm.

[0024] Spectral curve T b (x), spectral curve T g (x) and spectral curve T r (x) are measured by the method described in the Examples section described later.

[0025] The pulse function f(x) and the pulse function g(x) can be zero in the same wavelength range and can have the same waveform.

[0026] In order to simultaneously satisfy conditions (I) and (II), for example, methods for adjusting the peak wavelength and peak intensity of the light emitted from the light source, methods for adjusting the emission intensity, peak wavelength, etc. of the color conversion layer, methods for adjusting the chromaticity and light transmittance of the color filter, etc. can be mentioned. Specific examples of methods for adjusting the emission intensity, peak wavelength, etc. of the color conversion layer include, for example, methods for adjusting the types, average particle diameters, and contents of quantum dots and fluorescent particles in the quantum dot composition described later, methods for adjusting the types and contents of polymers, methods for adjusting the thickness of the color conversion layer, etc. Specific examples of methods for adjusting the chromaticity and light transmittance of the color filter include, for example, methods for adjusting the colorant, types and contents of resins, etc. in the colored curable resin composition described later, methods for adjusting the thickness of the color filter, etc.

[0027] <Light source> The light source (A) is a light source that emits light capable of causing the quantum dots (B-r) in the color conversion layer (B) to emit light. For example, known light sources such as light-emitting diodes (LEDs) such as blue light-emitting diodes, lasers, and ELs can be used. As the light source (A), a light source that preferably emits light having a peak at 600 nm or less from the viewpoints of color gamut and extraction efficiency, and more preferably a light source that emits light in blue is used. The peak of the light emitted from the light source (A) is measured according to the method described in the column of the examples described later. The light source (A) more preferably has a peak in the wavelength range of 440 nm to 460 nm. The full width at half maximum of the peak of the light source (A) is preferably 20 nm to 80 nm.

[0028] The light source (A) can be used as a backlight in combination with the color conversion layer (B). The backlight may include a light guide plate.

[0029] <Color conversion layer> The color conversion layer (B) preferably can convert the light from the light source (A) into white light. The color conversion layer (B) can be a member that converts the primary light into white light by absorbing a part of the light from the light source (A) to emit red light and transmitting another part of the light from the light source (A). White light refers to light in which at least blue light, red light, and green light are mixed.

[0030] The color conversion layer (B) contains quantum dots (B-r) that emit red light.

[0031] The thickness of the color conversion layer (B) can be, for example, 0.01 μm or more and 1000 mm or less, preferably 0.1 μm or more and 10 mm or less, more preferably 1 μm or more and 1 mm or less, and even more preferably 10 μm or more and 150 μm or less. The thickness of the color conversion layer (B) is measured according to the method described in the column of the examples below.

[0032] The color conversion layer (B) can be a layer containing a cured product of a curable resin composition containing quantum dots (B-r) (hereinafter also referred to as a quantum dot composition). The color conversion layer (B) can have a single-layer structure consisting only of a layer containing a cured product of the quantum dot composition, or can have a multilayer structure consisting of a plurality of layers. When the color conversion layer (B) has a multilayer structure, the color conversion layer (B) may have two or more layers containing a cured product of the quantum dot composition, or may have layers other than the layer containing a cured product of the quantum dot composition. Examples of the layers other than the layer containing a cured product of the quantum dot composition include any layers such as a substrate, a barrier layer, and a light scattering layer described below.

[0033] [Quantum dots] The emission spectrum (peak) of red light emitted from the quantum dots (B-r) preferably has a maximum value in the wavelength range of 610 nm to 750 nm. When it has a maximum value in the wavelength range of 610 nm to 750 nm, the color purity of the red light corresponding to the peak is particularly high, so the luminance of the red light in the display device can be further improved. More preferably, the maximum value exists in the wavelength range of 620 nm to 650 nm. The emission spectrum of the quantum dots (B-r) is measured according to the method described in the column of the examples below.

[0034] The emission spectrum of the quantum dots (B-r) preferably has a full width at half maximum of 10 nm to 80 nm. When the full width at half maximum is 80 nm or less, the color purity of the red light in the light emission from the color conversion layer (B) is high, so the luminance of the red light in the display device can be further improved. On the other hand, the full width at half maximum of the emission spectrum of the red light is more preferably 10 nm to 45 nm, and even more preferably 10 nm to 35 nm. The full width at half maximum of the peak of the emission spectrum of the quantum dots (B-r) is preferably 20 nm or more and 80 nm or less.

[0035] Examples of the indium compound include III-V group indium compounds, III-VI group indium compounds, and I-III-VI group indium compounds, preferably III-V group indium compounds, and more preferably indium compounds containing a phosphorus element in group V.

[0036] Examples of the cadmium compound include II-VI group cadmium compounds and II-V group cadmium compounds.

[0037] The indium compound does not contain cadmium element, and the cadmium compound does not contain indium element.

[0038] [III-V group indium compound] A III-V indium compound is a compound containing a group III element and a group V element, and is a compound containing at least indium element. Here, group III means group 13 of the periodic table, and group V means group 15 of the periodic table (the same applies hereinafter). In this specification, "periodic table" means the long-form periodic table.

[0039] The III-V indium compounds may be binary, ternary, or quaternary.

[0040] The binary III-V indium compound may be any compound containing an indium element (first element) and a group V element (second element), and examples thereof include InN, InP, InAs, and InSb.

[0041] The ternary III-V indium compound may be a compound containing indium element (first element) and two elements (second elements) selected from group V, or may be a compound containing two elements (first elements) selected from group III, one of which is indium element, and one element (second element) selected from group V.

[0042] Ternary III-V indium compounds include, for example, InPN, InPAs, InPSb, and InGaP.

[0043] A quaternary III-V indium compound is a compound containing two elements (first elements) selected from group III, one of which is indium, and two elements (second elements) selected from group V.

[0044] Examples of quaternary III-V indium compounds include InGaPN, InGaPAs, and InGaPSb.

[0045] Semiconductors containing III-V indium compounds may contain elements other than those in Groups 13 and 15 of the periodic table (with the exception of cadmium) as doping elements.

[0046] [III-VI Group Indium Compounds] A III-VI indium compound is a compound containing a group III element and a group VI element, and at least indium element, where group VI means group 16 of the periodic table (the same applies hereinafter).

[0047] The III-VI indium compounds may be binary, ternary, or quaternary.

[0048] The binary III-VI indium compound may be any compound containing an indium element (first element) and a group VI element (second element), and examples thereof include In2S3, In2Se3, and In2Te3.

[0049] The ternary III-VI indium compound may be a compound containing indium element (first element) and two elements (second elements) selected from Group VI, or may be a compound containing two elements (first elements) selected from Group III, one of which is indium element, and one element (second element) selected from Group VI.

[0050] Ternary III-VI indium compounds include, for example, InGaS3, InGaSe3, InGaTe3, In2SSe2, and In2TeSe2.

[0051] A quaternary III-VI indium compound is a compound containing two elements (first elements) selected from group III, one of which is indium, and two elements (second elements) selected from group VI.

[0052] Examples of quaternary III-VI indium compounds include InGaSSe2, InGaSeTe2, and InGaSTe2.

[0053] Semiconductors containing Group III-VI indium compounds may contain elements other than those in Groups 13 and 16 of the periodic table (with the exception of cadmium) as doping elements.

[0054] [Group I-III-VI Indium Compounds] The Group I-III-VI indium compound is a compound containing a Group I element, a Group III element, and a Group VI element, and is a compound containing at least an indium element. Here, Group I means Group 11 of the periodic table (the same applies hereinafter).

[0055] The Group I-III-VI indium compound may be a ternary system or a quaternary system.

[0056] The ternary Group I-III-VI indium compound is a compound containing an element selected from Group I (the first element), an indium element (the second element), and an element selected from Group VI (the third element).

[0057] Examples of the ternary Group I-III-VI indium compound include CuInS2.

[0058] The semiconductor containing the Group I-III-VI indium compound may contain elements other than those in Group 11, Group 13, and Group 16 of the periodic table (excluding cadmium elements) as doping elements.

[0059] From the viewpoint of obtaining sufficient emission intensity, indium compounds such as InP, CuInS2, InNP, and GaInNP are preferred, and InP and CuInS2 are more preferred.

[0060] [Group II-VI Cadmium Compounds] The Group II-VI cadmium compound is a compound containing a Group II element and a Group VI element, and is a compound containing at least a cadmium element. Here, Group II means Group 2 or Group 12 of the periodic table (the same applies hereinafter).

[0061] The Group II-VI cadmium compound may be a binary system, a ternary system, or a quaternary system.

[0062] The binary II-VI cadmium compounds are compounds containing a cadmium element (the first element) and an element from Group 16 (the second element), and examples include CdS, CdSe, and CdTe.

[0063] The ternary II-VI cadmium compounds may be compounds containing a cadmium element (the first element) and two types of elements selected from Group VI (the second element), or may be compounds containing two types of elements selected from Group II (the first element) with one type being the cadmium element and one type of element selected from Group VI (the second element).

[0064] Examples of the ternary II-VI cadmium compounds include CdSeS, CdSeTe, CdSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, and CdHgTe.

[0065] The quaternary II-VI cadmium compounds are compounds containing two types of elements selected from Group II (the first element) with one type being the cadmium element and two types of elements selected from Group VI (the second element).

[0066] Examples of the quaternary II-VI cadmium compounds include CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, and CdHgSTe.

[0067] The semiconductors containing II-VI cadmium compounds may contain elements other than those in Groups 2, 12, and 16 of the periodic table (excluding indium elements) as doping elements.

[0068] [II-V cadmium compounds] The II-V cadmium compounds are compounds containing a Group II element and a Group V element, and are compounds containing at least a cadmium element.

[0069] The II-V cadmium compounds may be binary, ternary, or quaternary.

[0070] The binary II-V group cadmium compound may be any compound containing a cadmium element (first element) and a group V element (second element), and examples thereof include Cd3P2, Cd3As2, and Cd3N2.

[0071] The ternary II-V cadmium compound may be a compound containing cadmium (first element) and two elements (second elements) selected from Group V, or may be a compound containing two elements (first elements) selected from Group II, one of which is cadmium, and one element (second element) selected from Group V.

[0072] Ternary II-V cadmium compounds include, for example, Cd3PN, Cd3PAs, Cd3AsN, Cd2ZnP2, Cd2ZnAs2, and Cd2ZnN2.

[0073] A quaternary II-V cadmium compound is a compound containing two elements (first elements) selected from Group II, one of which is cadmium, and two elements (second elements) selected from Group V.

[0074] Examples of quaternary II-V cadmium compounds include CdZnPN, CdZnPAs, and Cd2ZnAsN.

[0075] Semiconductors containing II-V cadmium compounds may contain elements other than those in Groups 2, 12, and 15 of the periodic table (with the exception of indium) as doping elements.

[0076] From the viewpoint of obtaining sufficient emission intensity, the cadmium compound is preferably CdS, CdSe, ZnCdS, CdSeS, CdSeTe, CdSTe, CdZnS, CdZnSe, CdZnTe, ZnCdSSe, CdZnSeS, CdZnSeTe, and CdZnSTe, more preferably CdS, CdSe, ZnCdS, CdSeS, CdZnS, CdZnSe, ZnCdSSe, and CdZnSeS, still more preferably CdS, CdSe, ZnCdS, ZnCdSSe, and CdZnSeS, and particularly preferably CdSe and CdZnSeS.

[0077] The indium compound particles and the cadmium compound particles may have an inorganic protective layer on the particle surface from the viewpoint of luminescence intensity and durability. The inorganic protective layer may be two or more layers or may be a single layer. Inorganic materials that can form the inorganic protective layer include, but are not limited to, semiconductors with a larger band gap than the indium compound and / or the cadmium compound. The inorganic protective layer is formed from a known inorganic material, such as ZnS.

[0078] Quantum dots (Br) can be synthesized by wet chemical processes, metal organic chemical vapor deposition processes, or molecular beam epitaxy processes. The wet chemical process is a method of growing particles by adding precursor materials to an organic solvent. As the crystals grow, the organic solvent naturally coordinates with the surface of the quantum dot crystals, acting as a dispersant and regulating the growth of the crystals. This allows for the control of nanoparticle growth through a process that is easier and less expensive than gas phase deposition methods such as metal organic chemical vapor deposition (MOCVD) and molecular beam epitaxy (MBE).

[0079] [Green fluorescent particles] The color conversion layer (B) can further contain green fluorescent particles (Bg) that emit green light in addition to the quantum dots (Br). When the color conversion layer (B) contains green fluorescent particles (Bg), part of the light from the light source (A) that enters the color conversion layer (B) is converted to red light by the quantum dots (Br) and emitted from the color conversion layer (B), another part is converted to green light by the green fluorescent particles (Bg) and emitted from the color conversion layer (B), and still another part passes through the color conversion layer (B) as light from the light source (A). As a result, the light from the light source (A), the red light, and the green light are mixed, and white light tends to be more easily emitted from the color conversion layer (B).

[0080] The emission spectrum of the green fluorescent particles (Bg) preferably has a full width at half maximum of 10 nm to 80 nm. If the full width at half maximum is 30 nm or less, the color purity of the green light is high, and the brightness of the green light of the display device can be further improved. On the other hand, if the full width at half maximum is 10 nm or more, this tends to be advantageous from the viewpoint of synthesis of the green fluorescent particles. The full width at half maximum of the emission spectrum of the green light is more preferably 10 nm to 60 nm, even more preferably 10 nm to 40 nm, even more preferably 10 nm to 30 nm, and particularly preferably 20 nm to 30 nm.

[0081] The emission spectrum (peak) of green light emitted from the green fluorescent particles (Bg) preferably has a maximum value in the wavelength range of 500 nm to 560 nm. When the maximum value is in the wavelength range of 500 nm to 560 nm, the color purity of the green light corresponding to the peak is particularly high, and the brightness of the green light of the display device can be further improved. The maximum value is more preferably in the wavelength range of 520 nm to 540 nm. The emission spectrum of the green fluorescent particles (Bg) is measured by the method described in the Examples section below.

[0082] [Perovskite fluorescent particles] A preferred example of the green fluorescent particles (Bg) is perovskite fluorescent particles. The perovskite fluorescent particles (B-g) are particles of a compound having a perovskite crystal structure (hereinafter also referred to as a perovskite compound) composed of A, B, and X as constituent components. A is a component located at each vertex of an octahedron centered on B in the perovskite crystal structure and is a monovalent cation. X represents a component located at each vertex of an octahedron centered on B in the perovskite crystal structure and is one or more anions selected from the group consisting of halide ions and thiocyanate ions. B is a component located at the center of an octahedron with A at the vertex and an octahedron with X at the vertex in the perovskite crystal structure and is a metal ion.

[0083] The perovskite compound composed of A, B, and X as constituent components is not particularly limited, and may be a compound having any of a three-dimensional structure, a two-dimensional structure, and a pseudo-two-dimensional structure. In the case of a three-dimensional structure, the composition formula of the perovskite compound is

Chemical formula

Chemical formula

[0084] The perovskite compound is preferably a perovskite compound represented by the following general formula (1).

Number

[0085] In the perovskite compound, B is a component located at the center of the hexahedron having A at the vertex and the octahedron having X at the vertex in the perovskite crystal structure, and represents a metal ion. The metal ion of the B component may be one or more kinds of ions selected from the group consisting of monovalent metal ions, divalent metal ions, and trivalent metal ions. It is preferable that B contains a divalent metal ion, and it is more preferable that B contains one or more kinds of metal ions selected from the group consisting of lead and tin.

[0086] In the perovskite compound, X represents a component located at each vertex of an octahedron with B at the center in the perovskite crystal structure, and represents one or more anions selected from the group consisting of halide ions and thiocyanate ions. X can be appropriately selected depending on the desired emission wavelength, and is preferably selected from chloride ions, bromide ions, and iodide ions in a content ratio appropriately selected depending on the emission wavelength. For example, X can be a combination of bromide ions and chloride ions, or a combination of bromide ions and iodide ions.

[0087] From the viewpoint of maintaining a good crystal structure, the average particle size of the perovskite compound particles is preferably 1 nm or more, more preferably 2 nm or more, and even more preferably 3 nm or more. From the viewpoint of making it difficult for the perovskite compound particles to settle, the average particle size is preferably 10 μm or less, more preferably 1 μm or less, and even more preferably 500 nm or less. The above upper and lower limits can be combined in any desired manner.

[0088] The average particle size of the perovskite compound particles is preferably 1 nm or more and 10 μm or less, more preferably 2 nm or more and 1 μm or less, and even more preferably 3 nm or more and 500 nm or less, from the viewpoint of making the perovskite compound particles less likely to settle and maintaining a good crystal structure.

[0089] The fluorescence peak of the perovskite compound is measured according to the measurement method described in the Examples section below.

[0090] Examples of the method for producing particles of a perovskite compound include a production method including a step of dissolving a B component, an X component, and an A component in a solvent to obtain a solution, and a step of mixing the obtained solution with a solvent having a lower solubility of the perovskite compound than the solvent used in the step of obtaining the solution, and a production method including a step of adding and dissolving the B component, the X component, and the A component in a high-temperature solvent to obtain a solution, and a step of cooling the obtained solution, and the like.

[0091] [Substrate] From the viewpoint of extracting light during light emission, the substrate included in the color conversion layer (B) preferably has translucency. As the substrate, for example, a thermoplastic resin film such as polyethylene terephthalate or a known material such as glass can be used. For example, in the color conversion layer (B), a layer containing a cured product of a quantum dot composition can be provided on the substrate.

[0092] [Barrier layer] The color conversion layer (B) may include a barrier layer in order to protect the layer containing the cured product of the quantum dot composition from water vapor in the outside air and air in the atmosphere. The barrier layer is not particularly limited, but a barrier layer having translucency is preferable from the viewpoint of extracting the emitted light. For example, known barrier layers such as polymers such as polyethylene terephthalate and glass films can be applied.

[0093] [Light scattering layer] The color conversion layer (B) may include a light scattering layer from the viewpoint of efficiently absorbing the incident light. The light scattering layer is not particularly limited, but a light scattering layer having translucency is preferable from the viewpoint of extracting the emitted light. For example, light scattering particles such as silica particles and known light scattering layers such as an amplified diffusion film can be applied.

[0094] [Method for producing color conversion layer] Examples of the method for manufacturing the color conversion layer (B) include a manufacturing method including a step of preparing a quantum dot composition, a step of coating the quantum dot composition on a substrate, and a step of removing a solvent; a manufacturing method including a step of producing a film containing a cured product of the quantum dot composition, and a step of bonding the obtained film to the substrate; and a manufacturing method including a step of preparing a quantum dot composition, a step of coating the quantum dot composition on the substrate, and a step of polymerizing a polymerizable compound, etc.

[0095] As a method for coating the quantum dot composition on a substrate, for example, known coating methods such as a gravure coating method, a bar coating method, a printing method, a spray method, a spin coating method, a dip method, and a die coating method can be used.

[0096] In the step of bonding a film containing a cured product of the quantum dot composition to the substrate, any adhesive can be used. The adhesive is not particularly limited as long as it does not dissolve the quantum dots, and known adhesives can be used.

[0097] The manufacturing method of the color conversion layer (B) may be a manufacturing method further including a step of bonding any film. Examples of the any film to be bonded include a barrier film, a light scattering film, a reflection film, a diffusion film, etc. In the step of bonding any film, any adhesive can be used. The above-mentioned adhesive is not particularly limited as long as it does not dissolve the quantum dots, and known adhesives can be used.

[0098] [Quantum dot composition] The color conversion layer (B) can be formed from the above-mentioned quantum dot composition. The quantum dot composition can contain, in addition to the quantum dots (B-r), the above-mentioned green fluorescent particles (B-g), a solvent, a polymerizable compound, or a polymer.

[0099] The content of quantum dots (Br) in the quantum dot composition is preferably 50% by mass or less, more preferably 5% by mass or less, and even more preferably 1% by mass or less, based on 100% by mass of the quantum dot composition. Furthermore, from the viewpoint of obtaining good luminescence intensity, the content is preferably 0.0001% by mass or more, more preferably 0.0005% by mass or more, and even more preferably 0.001% by mass or more. The upper and lower limits above can be arbitrarily combined. The content of the quantum dots (Br) in the quantum dot composition is usually 0.0001% by mass or more and 50% by mass or less, preferably 0.0001% by mass or more and 5% by mass or less, and more preferably 0.0005% by mass or more and 2% by mass or less, based on 100% by mass of the quantum dot composition. A quantum dot composition having a content of quantum dots (Br) within the above range is preferred in that the quantum dots (D) are less likely to aggregate and exhibit good luminescence.

[0100] When the quantum dot composition contains perovskite fluorescent particles (Bg), the content of the perovskite fluorescent particles (Bg) in the quantum dot composition is preferably 50% by mass or less, more preferably 5% by mass or less, and even more preferably 1% by mass or less, based on 100% by mass of the curable composition, from the viewpoint of preventing condensation of the fluorescent particles and preventing concentration quenching. Furthermore, from the viewpoint of obtaining good luminescence intensity, the content is preferably 0.0001% by mass or more, more preferably 0.001% by mass or more, and even more preferably 0.01% by mass or more. The above upper and lower limits can be arbitrarily combined. When the quantum dot composition contains perovskite fluorescent particles (Bg), the content of the perovskite fluorescent particles (Bg) in the quantum dot composition is typically 0.0001% by mass or more and 50% by mass or less, preferably 0.0001% by mass or more and 5% by mass or less, and more preferably 0.0005% by mass or more and 2% by mass or less, relative to 100% by mass of the quantum dot composition. A composition having a content of the perovskite fluorescent particles (Bg) within the above range is preferred in that the perovskite fluorescent particles (Bg) are less likely to aggregate and exhibit good luminescence properties.

[0101] [solvent] The solvent is a medium capable of dispersing the quantum dots (Br), and is preferably one that does not easily dissolve the quantum dots (Br). The term "solvent" refers to a substance that is in a liquid state at 1 atmosphere and 25°C (excluding polymerizable compounds and polymers). The term "dispersed" refers to a state in which the quantum dots (Br), perovskite fluorescent particles (Bg), etc. are suspended or floated in the solvent, polymerizable compound, polymer, etc., and some may be precipitated.

[0102] Examples of the solvent include esters such as methyl formate, ethyl formate, propyl formate, pentyl formate, methyl acetate, ethyl acetate, and pentyl acetate; ketones such as γ-butyrolactone, acetone, dimethyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, and methylcyclohexanone; ethers such as diethyl ether, methyl tert-butyl ether, diisopropyl ether, dimethoxymethane, dimethoxyethane, 1,4-dioxane, 1,3-dioxolane, 4-methyldioxolane, tetrahydrofuran, methyltetrahydrofuran, anisole, and phenetole; and ethers such as methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, tert-butanol, 1-pentanol, 2-methyl-2-butanol, methoxypropanol, diacetone alcohol, cyclohexanol, 2-fluoroethanol, and 2,2,2-trifluoroethanol. glycol ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether acetate, and triethylene glycol dimethyl ether; organic solvents having an amide group such as N-methyl-2-pyrrolidone, N,N-dimethylformamide, acetamide, and N,N-dimethylacetamide; organic solvents having a nitrile group such as acetonitrile, isobutyronitrile, propionitrile, and methoxyacetonitrile; organic solvents having a hydrocarbon group such as ethylene carbonate and propylene carbonate; organic solvents having a halogenated hydrocarbon group such as methylene chloride and chloroform; organic solvents having a hydrocarbon group such as n-pentane, cyclohexane, n-hexane, benzene, toluene, and xylene; and dimethyl sulfoxide.

[0103] Among these, esters such as methyl formate, ethyl formate, propyl formate, pentyl formate, methyl acetate, ethyl acetate, pentyl acetate; ketones such as γ-butyrolactone, acetone, dimethyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, methylcyclohexanone; ethers such as diethyl ether, methyl-tert-butyl ether, diisopropyl ether, dimethoxymethane, dimethoxyethane, 1,4-dioxane, 1,3-dioxolane, 4-methyldioxolane, tetrahydrofuran, methyltetrahydrofuran, anisole, phenetole; organic solvents having a nitrile group such as acetonitrile, isobutyronitrile, propionitrile, methoxyacetonitrile; organic solvents having a carbonate group such as ethylene carbonate, propylene carbonate; organic solvents having a halogenated hydrocarbon group such as methylene chloride, chloroform; and organic solvents having a hydrocarbon group such as n-pentane, cyclohexane, n-hexane, benzene, toluene, xylene are preferred because they have low polarity and are considered difficult to dissolve quantum dots (B-r). Organic solvents having a halogenated hydrocarbon group such as methylene chloride, chloroform; and organic solvents having a hydrocarbon group such as n-pentane, cyclohexane, n-hexane, benzene, toluene, xylene are more preferred.

[0104] When the quantum dot composition contains a solvent, the content of the solvent in the quantum dot composition may be, for example, 10 to 99.99% by mass, preferably 15 to 90% by mass, and more preferably 15 to 80% by mass.

[0105] [Polymerizable compound or polymer] The polymerizable compound is not particularly limited and may be one type or two or more types. As the polymerizable compound, a polymerizable compound having good dispersibility of quantum dots (B-r) at the temperature for producing the quantum dot composition is preferred. As used herein, the term "polymerizable compound" means a monomeric compound having a polymerizable group. For example, when produced at room temperature and normal pressure, the polymerizable compound is not particularly limited, and examples thereof include known polymerizable compounds such as styrene and methyl (meth)acrylate. Among them, as the polymerizable compound, one or both of (meth)acrylate and methacrylate, which are monomer components of acrylic resins, are preferable. As used herein, the term "(meth)acrylic acid" represents at least one selected from the group consisting of acrylic acid and methacrylic acid. Expressions such as "(meth)acryloyl" and "(meth)acrylate" have the same meaning.

[0106] The polymer is not particularly limited and may be one type or two or more types. As the polymer, a polymerizable compound with low solubility of quantum dots (B-r) at the temperature for producing the quantum dot composition is preferable. For example, known polymers such as polystyrene, (meth)acrylic resin, silicone, cycloolefin polymer, and polyester can be mentioned. Among them, as the polymer, cycloolefin polymer, (meth)acrylic resin, and polyester are preferable from the viewpoints of higher transparency and efficient extraction of emitted light. The acrylic resin contains structural units derived from either or both of acrylic ester and methacrylic ester. With respect to all the structural units contained in the polymerizable compound or polymer, the acrylic ester and / or methacrylic ester and the structural units derived therefrom may be 10% or more, 30% or more, 50% or more, 80% or more, or 100% with respect to all the structural units, when expressed in mol%.

[0107] When the quantum dot composition contains a polymerizable compound or a polymer, the content of the polymerizable compound or polymer in the quantum dot composition is, for example, 5% by mass or more and 99% by mass or less, preferably 10% by mass or more and 99% by mass or less, more preferably 20% by mass or more and 99% by mass or less, still more preferably 40% by mass or more and 99% by mass or less, and even more preferably 50% by mass or more and 99% by mass or less, based on 100% by mass of the solid content of the quantum dot composition. When the content of the polymerizable compound or polymer is within the above range, the mechanical properties and optical properties of the cured product of the quantum dot composition tend to be good. The solid content of the quantum dot composition means the total of the components excluding the solvent among all the components contained in the quantum dot composition.

[0108] [Other components] Examples of other components include, for example, some impurities, and compounds having an amorphous structure composed of elemental components constituting quantum dots (B-r) or perovskite fluorescent particles (B-g), a polymerization initiator, and an inorganic compound for forming a protective layer of quantum dots (B-r). The content ratio of other components is preferably 10% by mass or less, more preferably 5% by mass or less, and still more preferably 1% by mass or less, based on the total mass of the quantum dot composition.

[0109] The color conversion layer (B) can be disposed in a display device in a form sealed in a glass tube or the like, or in a form sealed by sandwiching it as a sheet between two barrier films.

[0110] <Color filter (C)> The color filter (C) has a blue color filter (C-b) that transmits blue light (blue light), a green color filter (C-g) that transmits green light (green light), and a red color filter (C-r) that transmits red light (red light). The white light emitted from the light conversion layer (B) is emitted from the display device as blue light, green light, and red light by passing through the blue color filter (C-b), the green color filter (C-g), and the red color filter (C-r), respectively.

[0111] The color filter (C) usually contains a colorant. The colorant may be a dye or a pigment. As the dye, known dyes can be used, for example, known dyes described in The Society of Dyers and Colourists' Color Index and Color Notes (published by Shikisen Co., Ltd.). Also, according to the chemical structure, azo dyes, cyanine dyes, triphenylmethane dyes, xanthene dyes, anthraquinone dyes, naphthoquinone dyes, quinoneimine dyes, methine dyes, azomethine dyes, squarylium dyes, acridine dyes, styryl dyes, coumarin dyes, quinoline dyes, nitro dyes, phthalocyanine dyes, perylene dyes, etc. can be mentioned. These dyes may be used alone or in combination of two or more.

[0112] Specifically, dyes with the following Color Index (C.I.) numbers can be mentioned. C.I. Solvent Yellow 4, 14, 15, 23, 24, 25, 38, 62, 63, 68, 79, 81, 82, 83, 89, 94, 98, 99, 117, 162, 163, 167, 189; C.I. Solvent Red 24, 45, 49, 90, 91, 111, 118, 119, 122, 124, 125, 127, 130, 132, 143, 145, 146, 150, 151, 155, 160, 168, 169, 172, 175, 181, 207, 218, 222, 227, 230, 245, 247; C.I. Solvent Orange 2, 7, 11, 15, 26, 41, 54, 56, 77, 86, 99; C.I. Solvent Violet 11, 13, 14, 26, 31, 36, 37, 38, 45, 47, 48, 51, 59, 60; C.I. Solvent Blue 4, 5, 14, 18, 35, 36, 37, 38, 44, 45, 58, 59, 59:1, 63, 67, 68, 69, 70, 78, 79, 83, 90, 94, 97, 98, 100, 101, 102, 104, 105, 111, 112, 122, 128, 132, 136, 139; C.I. Solvent Green 1, 3, 4, 5, 7, 28, 29, 32, 33, 34, 35, etc. of C.I. Solvent Dyes, C.I. Acid Yellow 1, 3, 7, 9, 11, 17, 23, 25, 29, 34, 36, 38, 40, 42, 54, 65, 72, 73, 76, 79, 98, 99, 111, 112, 113, 114, 116, 119, 123, 128, 134, 135, 138, 139, 140, 144, 150, 155, 157, 160, 161, 163, 168, 169, 172, 177, 178, 179, 184, 190, 193, 196, 197, 199, 202, 203, 204, 205, 207, 212, 214, 220, 221, 228, 230, 232, 235, 238, 240, 242, 243, 251; C.I. Acid Red 1, 4, 8, 14, 17, 18, 26, 27, 29, 31, 33, 34, 35, 37, 40, 42, 44, 50, 51, 52, 57, 66, 73, 76, 80, 87, 88, 91, 92, 94, 95, 97, 98, 103, 106, 111, 114, 129, 133, 134, 138, 143, 145, 150, 151, 155, 158, 160, 172, 176, 182, 183, 195, 198, 206, 211, 215, 216, 217, 227, 228, 249, 252, 257, 258, 260, 261, 266, 268, 270, 274, 277, 280, 281, 289, 308, 312, 315, 316, 339, 341, 345, 346, 349, 382, 383, 388, 394, 401, 412, 417, 418, 422, 426; C.I. Acid Orange 6, 7, 8, 10, 12, 26, 50, 51, 52, 56, 62, 63, 64, 74, 75, 94, 95, 107, 108, 149, 162, 169, 173; C.I. Acid Violet 6B, 7, 9, 15, 16, 17, 19, 21, 23, 24, 25, 30, 34, 38, 49, 72, 102; C.I. Acid Blue 1, 3, 5, 7, 9, 11, 13, 15, 17, 18, 22, 23, 24, 25, 26, 27, 29, 34, 38, 40, 41, 42, 43, 45, 48, 51, 54, 59, 60, 62, 70, 72, 74, 75, 78, 80, 82, 83, 86, 87, 88, 90, 90:1, 91, 92, 93, 93:1, 96, 99, 100, 102, 103, 104, 108, 109, 110, 112, 113, 117, 119, 120, 123, 126, 127, 129, 130, 131, 138, 140, 142, 143, 147, 150, 151, 154, 158, 161, 166, 167, 168, 170, 171, 175, 182, 183, 184, 187, 192, 199, 203, 204, 205, 210, 213, 229, 234, 236, 242, 243, 249, 256, 259, 267, 269, 278, 280, 285, 290, 296, 315, 324:1, 335, 340; C.I. Acid Green 1, 3, 5, 6, 7, 8, 9, 11, 13, 14, 15, 16, 22, 25, 27, 28, 41, 50, 50:1, 58, 63, 65, 80, 104, 105, 106, 109 and other C.I. acid dyes, C.I. Direct Yellow 2, 4, 28, 33, 34, 35, 38, 39, 43, 44, 47, 50, 54, 58, 68, 69, 70, 71, 86, 93, 94, 95, 98, 102, 108, 109, 129, 132, 136, 138, 141; C.I. Direct Red 79, 82, 83, 84, 91, 92, 96, 97, 98, 99, 105, 106, 107, 172, 173, 176, 177, 179, 181, 182, 184, 204, 207, 211, 213, 218, 220, 221, 222, 232, 233, 234, 241, 243, 246, 250; C.I. Direct Orange 26, 34, 39, 41, 46, 50, 52, 56, 57, 61, 64, 65, 68, 70, 96, 97, 106, 107; C.I. Direct Violet 47, 52, 54, 59, 60, 65, 66, 79, 80, 81, 82, 84, 89, 90, 93, 95, 96, 103, 104; C.I. Direct Blue 1, 2, 3, 6, 8, 15, 22, 25, 28, 29, 40, 41, 42, 47, 52, 55, 57, 71, 76, 77, 78, 80, 81, 84, 85, 86, 87, 90, 93, 94, 95, 97, 98, 99, 100, 101, 106, 107, 108, 109, 113, 114, 115, 117, 119, 120, 137, 149, 150, 153, 155, 156, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 170, 171, 172, 173, 188, 189, 190, 192, 193, 194, 195, 196, 198, 199, 200, 201, 202, 203, 207, 209, 210, 212, 213, 214, 222, 225, 226, 228, 229, 236, 237, 238, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 256, 257, 259, 260, 268, 274, 275, 293; C.I. Direct Green 25, 27, 31, 32, 34, 37, 63, 65, 66, 67, 68, 69, 72, 79, 82 and other C.I. direct dyes, C.I. Disperse Yellow 51, 54, 76; C.I. Disperse Violet 26, 27; C.I. Disperse Blue 1, 14, 56, 60 and other C.I. disperse dyes, C.I. Basic Red 1, 10; C.I. Basic Blue 1, 3, 5, 7, 9, 19, 21, 22, 24, 25, 26, 28, 29, 40, 41, 45, 47, 54, 58, 59, 60, 64, 65, 66, 67, 68, 81, 83, 88, 89; C.I. Basic Violet 2; C.I. Basic Red 9; C.I. Basic Green 1; and other C.I. basic dyes, C.I. Reactive Yellow 2, 76, 116; C.I. Reactive Orange 16; C.I. Reactive Red 36; and other C.I. reactive dyes, C.I. Mordant Yellow 5, 8, 10, 16, 20, 26, 30, 31, 33, 42, 43, 45, 56, 61, 62, 65; C.I. Mordant Red 1, 2, 3, 4, 9, 11, 12, 14, 17, 18, 19, 22, 23, 24, 25, 26, 27, 29, 30, 32, 33, 36, 37, 38, 39, 41, 42, 43, 45, 46, 48, 52, 53, 56, 62, 63, 71, 74, 76, 78, 85, 86, 88, 90, 94, 95; C.I. Mordant Orange 3, 4, 5, 8, 12, 13, 14, 20, 21, 23, 24, 28, 29, 32, 34, 35, 36, 37, 42, 43, 47, 48; C.I. Mordant Violet 1, 1:1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 27, 28, 30, 31, 32, 33, 36, 37, 39, 40, 41, 44, 45, 47, 48, 49, 53, 58; C.I. Mordant Blue 1, 2, 3, 7, 8, 9, 12, 13, 15, 16, 19, 20, 21, 22, 23, 24, 26, 30, 31, 32, 39, 40, 41, 43, 44, 48, 49, 53, 61, 74, 77, 83, 84; C.I. Mordant Green 1, 3, 4, 5, 10, 13, 15, 19, 21, 23, 26, 29, 31, 33, 34, 35, 41, 43, 53 and other C.I. Mordant dyes, C.I. Vat Green 1 and other C.I. Vat dyes, etc.

[0113] Furthermore, there are Lumogen® products of BASF, including Lumogen® F Yellow 083 (manufactured by BASF), Lumogen® F Yellow 170 (manufactured by BASF), Lumogen® F Orange 240 (manufactured by BASF), and Lumogen® F Red 305 (manufactured by BASF).

[0114] As the pigment, known pigments can be used, for example, pigments classified as pigments in the Color Index (published by The Society of Dyers and Colourists). These may be used alone or in combination of two or more. Specifically, yellow pigments such as CI Pigment Yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 53, 83, 86, 93, 94, 109, 110, 117, 125, 128, 129, 137, 138, 139, 147, 148, 150, 153, 154, 166, 173, 185, 194, 214, and 231; Orange pigments such as CI Pigment Orange 13, 31, 36, 38, 40, 42, 43, 51, 55, 59, 61, 64, 65, 71, 73; Red pigments such as CI Pigment Red 9, 97, 105, 122, 123, 144, 149, 166, 168, 176, 177, 178, 179, 180, 190, 192, 209, 215, 216, 224, 242, 254, 255, 264, 265, 266, 268, 269, 273; Blue pigments such as CI Pigment Blue 15, 15:1, 15:2, 15:3, 15:4, 15:6, 16, 60; Violet pigments such as CI Pigment Violet 1, 19, 23, 29, 32, 36, 38; Green pigments such as CI Pigment Green 7, 36, 58, 59, 62, 63; Brown pigments such as CI Pigment Brown 23 and 25; Black pigments such as CI Pigment Black 1, 7, 31, and 32 Examples include:

[0115] Examples of the colorant include, in terms of chemical structure, perylene yellow dyes, quinophthalone yellow pigments, metal-containing yellow pigments, isoindoline yellow pigments, perylene orange dyes, perylene orange pigments, perylene red dyes, perylene red pigments, phthalocyanine pigments, copper halide phthalocyanine pigments, zinc halide phthalocyanine pigments, aluminum zinc halide phthalocyanine pigments, brominated diketopyrrolopyrrole pigments, and the like.

[0116] The blue color filter (C-b) can contain at least one dye and pigment classified as blue in hue among the above colorants. The colorant contained in the blue color filter (C-b) is preferably a blue pigment, more preferably C.I. Pigment Blue 15, 15:3, 15:4, 15:6, 16, 60, and still more preferably C.I. Pigment Blue 15:6.

[0117] The green color filter (C-g) can contain at least one dye and pigment classified as green in hue among the above colorants. The colorant contained in the green color filter (C-g) is preferably a combination of a green pigment and a yellow pigment, more preferably at least one selected from the group consisting of C.I. Pigment Green 7, 36, 58, 59, 62, 63 and at least one selected from the group consisting of C.I. Pigment Yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 53, 83, 86, 93, 94, 109, 110, 117, 125, 128, 129, 137, 138, 139, 147, 148, 150, 153, 154, 166, 173, 185, 194, 214, 231, and still more preferably a combination of C.I. Pigment Green 58 and C.I. Pigment Yellow 150.

[0118] The red color filter (C-r) can contain at least one dye and pigment classified as red in hue among the above colorants. The colorant contained in the red color filter (C-r) is preferably a red pigment, more preferably a brominated diketopyrrolopyrrole pigment or the like.

[0119] [Manufacturing method of color filter (C)] The color filter (C) can be produced as a color filter (C) having a blue color filter (Cb), a green color filter (Cg), and a red color filter (Cr) by forming blue, green, and red patterns (hereinafter collectively referred to as colored patterns) on a substrate from blue, green, and red curable resin compositions (hereinafter collectively referred to as colored curable resin compositions), respectively.

[0120] Methods for forming a colored pattern from a colored curable resin composition include photolithography, inkjet printing, and printing, with photolithography being preferred. Photolithography is a method in which a colored curable resin composition is applied to a substrate, dried to form a colored composition layer, and then exposed to light through a photomask and developed. In photolithography, a colored coating film, which is a cured product of the colored composition layer, can be formed by not using a photomask during exposure and / or not developing. The colored pattern or colored coating film formed from the colored curable resin composition is the color filter (C) of the present invention.

[0121] The thickness of the color filter to be produced is not particularly limited and can be adjusted appropriately depending on the purpose, use, etc., and is, for example, 0.1 to 30 μm, preferably 0.1 to 20 μm, and more preferably 0.5 to 6 μm. The thickness of the color filter may be, for example, less than 3.5 μm.

[0122] The substrate may be a glass plate such as quartz glass, borosilicate glass, alumina silicate glass, or silica-coated soda lime glass; a resin plate such as polycarbonate, polymethyl methacrylate, or polyethylene terephthalate; silicon; or a substrate having a thin film of aluminum, silver, or a silver / copper / palladium alloy formed thereon. Another color filter layer, a resin layer, a transistor, a circuit, or the like may be formed on the substrate. The substrate may be included in the color filter (C).

[0123] The formation of a colored pattern by photolithography can be carried out using known or conventional equipment and conditions. For example, the pattern can be produced as follows. First, the colored curable resin composition is applied onto a substrate, and then dried by heating (pre-baking) and / or drying under reduced pressure to remove volatile components such as solvents, thereby obtaining a smooth colored curable resin composition layer. Examples of the coating method include spin coating, slit coating, and slit-and-spin coating. When drying by heating, the temperature is preferably 30 to 120°C, more preferably 50 to 110°C. The heating time is preferably 10 seconds to 60 minutes, more preferably 30 seconds to 30 minutes. When drying under reduced pressure is performed, it is preferably performed under a pressure of 50 to 150 Pa at a temperature in the range of 20 to 25°C. The film thickness of the colored curable resin composition layer is not particularly limited and may be appropriately selected depending on the film thickness of the desired color filter.

[0124] Next, the colored curable resin composition layer is exposed to light through a photomask to form a desired colored pattern. The pattern on the photomask is not particularly limited, and a pattern appropriate for the intended use is used. A light source used for exposure is preferably a light source that emits light with a wavelength of 250 to 450 nm. For example, light less than 350 nm may be cut using a filter that cuts this wavelength range, or light around 436 nm, 408 nm, and 365 nm may be selectively extracted using a bandpass filter that extracts these wavelength ranges. Specific examples of light sources include mercury lamps, light-emitting diodes, metal halide lamps, and halogen lamps. It is preferable to use an exposure device such as a mask aligner or a stepper, because this allows the entire exposure surface to be uniformly irradiated with parallel light rays and allows accurate alignment of the photomask with the substrate on which the colored curable resin composition layer is formed.

[0125] A colored pattern is formed on the substrate by bringing the exposed colored curable resin composition layer into contact with a developer and developing it. By development, the unexposed areas of the colored curable resin composition layer are dissolved in the developer and removed. The developer is preferably an aqueous solution of an alkaline compound such as potassium hydroxide, sodium hydrogen carbonate, sodium carbonate, or tetramethylammonium hydroxide. The concentration of the alkaline compound is preferably 0.01 to 10% by mass, more preferably 0.02 to 5% by mass. The developer may contain a surfactant. The developing method may be any of a puddle method, a dipping method, a spray method, etc. Furthermore, the substrate may be tilted at any angle during development. After development, the substrate is preferably washed with water. Furthermore, it is preferable to perform post-baking on the obtained colored pattern. The post-baking temperature is preferably 150 to 250° C., more preferably 160 to 235° C. The post-baking time is preferably 1 to 120 minutes, more preferably 10 to 60 minutes. The color filter, which is a colored pattern or colored coating film obtained in this manner, may be further subjected to a surface coating treatment to impart various properties.

[0126] [Colored curable resin composition] The colored curable resin composition contains, in addition to the colorant described above (hereinafter also referred to as colorant (A)), a resin (B), a polymerizable compound (C), and a polymerization initiator (D).

[0127] The content rate of the solid content in the colored curable resin composition is 100% by mass or less, preferably 0.01% by mass or more and 100% by mass or less, more preferably 0.1% by mass or more and 99.9% by mass or less, still more preferably 0.1% by mass or more and 99% by mass or less, particularly preferably 1% by mass or more and 90% by mass or less, even more preferably 1% by mass or more and 80% or less, particularly preferably 1% by mass or more and 70% or less, extremely preferably 1% by mass or more and 60% or less, and most preferably 1% by mass or more and 50% by mass or less. In this specification, the "total amount of solid content" means the total amount of components excluding the solvent (E) from the colored curable resin composition. The total amount of the solid content and the content of each component relative thereto can be measured by known analytical means such as liquid chromatography or gas chromatography.

[0128] The content rate of the colorant (A) in the colored curable resin composition may be, for example, 1% by mass or more and 99% by mass or less in the total amount of the solid content, preferably 1% by mass or more and 90% by mass or less, more preferably 1% by mass or more and 80% by mass or less, still more preferably 1% by mass or more and 70% by mass or less, particularly preferably 1% by mass or more and 60% by mass or less, even more preferably 1% by mass or more and 55% by mass or less, particularly preferably 5% by mass or more and 55% by mass or less, extremely preferably 10% by mass or more and 55% by mass or less. In a preferred embodiment of the present invention, the content rate of the colorant (A) in the colored curable resin composition may be, for example, 12% by mass or more and 80% by mass or less in the total amount of the solid content, preferably 15% by mass or more and 70% by mass or less, more preferably 20% by mass or more and 50% by mass or less.

[0129] [Resin (B)] The resin (B) is preferably an alkali-soluble resin, and more preferably a polymer having a structural unit derived from at least one monomer selected from the group consisting of unsaturated carboxylic acids and unsaturated carboxylic acid anhydrides (hereinafter sometimes referred to as "monomer (a)"). Resin (B) is preferably a copolymer having a structural unit derived from a monomer having a cyclic ether structure with 2 to 4 carbon atoms and an ethylenically unsaturated bond (hereinafter sometimes referred to as "monomer (b)"), and other structural units. Examples of the other structural units include structural units derived from a monomer copolymerizable with monomer (a) (however, different from monomer (a) and monomer (b); hereinafter sometimes referred to as "monomer (c)"), structural units having an ethylenically unsaturated bond, and the like.

[0130] Examples of monomer (a) include unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, and o-, m-, p-vinylbenzoic acid; unsaturated dicarboxylic acids such as maleic acid, fumaric acid, citraconic acid, mesaconic acid, itaconic acid, 3-vinylphthalic acid, 4-vinylphthalic acid, 3,4,5,6-tetrahydrophthalic acid, 1,2,3,6-tetrahydrophthalic acid, dimethyltetrahydrophthalic acid, and 1,4-cyclohexenedicarboxylic acid; bicyclic unsaturated compounds containing a carboxy group such as methyl-5-norbornene-2,3-dicarboxylic acid, 5-carboxybicyclo[2.2.1]hept-2-ene, 5,6-dicarboxybicyclo[2.2.1]hept-2-ene, 5-carboxy-5-methylbicyclo[2.2.1]hept-2-ene, 5-carboxy-5-ethylbicyclo[2.2.1]hept-2-ene, 5-carboxy-6-methylbicyclo[2.2.1]hept-2-ene, and 5-carboxy-6-ethylbicyclo[2.2.1]hept-2-ene; unsaturated dicarboxylic anhydrides such as maleic anhydride, citraconic anhydride, itaconic anhydride, 3-vinylphthalic anhydride, 4-vinylphthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, and 5,6-dicarboxybicyclo[2.2.1]hept-2-ene anhydride; Unsaturated mono[(meth)acryloyloxyalkyl] esters of polyvalent carboxylic acids having a valency of 2 or more, such as mono[2-(meth)acryloyloxyethyl] succinate and mono[2-(meth)acryloyloxyethyl] phthalate; Unsaturated acrylates containing a hydroxy group and a carboxy group in the same molecule, such as α-(hydroxymethyl)acrylic acid; etc. are exemplified.

[0131] Among these, acrylic acid, methacrylic acid, maleic anhydride, etc. are preferable from the viewpoints of copolymerization reactivity and solubility of the resulting resin in an aqueous alkali solution.

[0132] Monomer (b) refers to a polymerizable compound having a cyclic ether structure with 2 to 4 carbon atoms (for example, at least one selected from the group consisting of an oxirane ring, an oxetane ring, and a tetrahydrofuran ring) and an ethylenically unsaturated bond. Monomer (b) preferably has a cyclic ether structure with 2 to 4 carbon atoms and a (meth)acryloyloxy group.

[0133] Examples of monomer (b) include monomers having an oxiranyl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "monomer (b1)"), monomers having an oxetanyl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "monomer (b2)"), and monomers having a tetrahydrofuryl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "monomer (b3)").

[0134] Examples of monomer (b1) include monomers having a structure in which a linear or branched aliphatic unsaturated hydrocarbon is epoxidized (hereinafter sometimes referred to as "monomer (b1-1)") and monomers having a structure in which an alicyclic unsaturated hydrocarbon is epoxidized (hereinafter sometimes referred to as "monomer (b1-2)").

[0135] As monomer (b1-1), monomers having a glycidyl group and an ethylenically unsaturated bond are preferable. Examples of the monomer (b1-1) include glycidyl (meth)acrylate, β-methylglycidyl (meth)acrylate, β-ethylglycidyl (meth)acrylate, glycidyl vinyl ether, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl ether, p-vinylbenzyl glycidyl ether, α-methyl-o-vinylbenzyl glycidyl ether, α-methyl-m-vinylbenzyl glycidyl ether, α-methyl-p-vinylbenzyl glycidyl ether, 2,3-bis(glycidyloxymethyl)styrene, 2,4-bis(glycidyloxymethyl)styrene, 2,5-bis(glycidyloxymethyl)styrene, 2,6-bis(glycidyloxymethyl)styrene, 2,3,4-tris(glycidyloxymethyl)styrene, 2,3,5-tris(glycidyloxymethyl)styrene, 2,3,6-tris(glycidyloxymethyl)styrene, 3,4,5-tris(glycidyloxymethyl)styrene, 2,4,6-tris(glycidyloxymethyl)styrene, and the like.

[0136] Examples of the monomer (b1-2) include vinylcyclohexene monooxide, 1,2-epoxy-4-vinylcyclohexane (e.g., Celoxide (registered trademark) 2000; manufactured by Daicel Corporation), 3,4-epoxycyclohexylmethyl (meth)acrylate (e.g., Cyclomer (registered trademark) A400; manufactured by Daicel Corporation), 3,4-epoxycyclohexylmethyl (meth)acrylate (e.g., Cyclomer (registered trademark) M100; manufactured by Daicel Corporation), the compound represented by the formula (BI), the compound represented by the formula (BII), and the like.

[0137] [Chemical formula]

[0138] [In the formula (BI) and the formula (BII), R a and R b each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and the hydrogen atom contained in the alkyl group may be substituted with a hydroxy group. X a and X b each independently represents a single bond, *-R c -, *-R c -O-, *-R c -S- or is *-R c -NH-. R c represents an alkanediyl group having 1 to 6 carbon atoms. * represents a bond to O.]

[0139] Examples of the alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, a tert-butyl group, and the like.

[0140] Examples of the alkyl group in which a hydrogen atom is substituted with a hydroxy group include a hydroxymethyl group, a 1-hydroxyethyl group, a 2-hydroxyethyl group, a 1-hydroxypropyl group, a 2-hydroxypropyl group, a 3-hydroxypropyl group, a 1-hydroxy-1-methylethyl group, a 2-hydroxy-1-methylethyl group, a 1-hydroxybutyl group, a 2-hydroxybutyl group, a 3-hydroxybutyl group, a 4-hydroxybutyl group, and the like.

[0141] R a and R b are preferably a hydrogen atom, a methyl group, a hydroxymethyl group, a 1-hydroxyethyl group, a 2-hydroxyethyl group, more preferably a hydrogen atom, a methyl group.

[0142] Examples of the alkanediyl group include a methylene group, an ethylene group, a propane-1,2-diyl group, a propane-1,3-diyl group, a butane-1,4-diyl group, a pentane-1,5-diyl group, a hexane-1,6-diyl group, and the like.

[0143] X a and X bExamples thereof preferably include a single bond, a methylene group, an ethylene group, *-CH2-O- and *-CH2CH2-O-, and more preferably include a single bond and *-CH2CH2-O- (* represents a bond to O).

[0144] Examples of the compound represented by formula (BI) include compounds represented by any of formula (BI-1) to formula (BI-15). Among them, compounds represented by formula (BI-1), formula (BI-3), formula (BI-5), formula (BI-7), formula (BI-9) and formula (BI-11) to formula (BI-15) are preferred, and compounds represented by formula (BI-1), formula (BI-7), formula (BI-9) and formula (BI-15) are more preferred.

[0145]

Chemical formula

[0146] Examples of the compound represented by formula (BII) include compounds represented by any of formula (BII-1) to formula (BII-15). Among them, preferably included are compounds represented by formula (BII-1), formula (BII-3), formula (BII-5), formula (BII-7), formula (BII-9) and formula (BII-11) to formula (BII-15), and more preferably included are compounds represented by formula (BII-1), formula (BII-7), formula (BII-9) and formula (BII-15).

[0147]

Chemical formula

[0148] The compound represented by formula (BI) and the compound represented by formula (BII) may each be used alone or in combination of two or more. The compound represented by formula (BI) and the compound represented by formula (BII) may be used in combination. When the compound represented by formula (BI) and the compound represented by formula (BII) are used in combination, their content ratios [compound represented by formula (BI):compound represented by formula (BII)] are preferably 5:95 to 95:5, more preferably 10:90 to 90:10, and still more preferably 20:80 to 80:20 on a molar basis.

[0149] As the monomer (b2), a monomer having an oxetanyl group and a (meth)acryloyloxy group is more preferable. Examples of the monomer (b2) include 3-methyl-3-methacryloyloxymethyloxetane, 3-methyl-3-acryloyloxymethyloxetane, 3-ethyl-3-methacryloyloxymethyloxetane, 3-ethyl-3-acryloyloxymethyloxetane, 3-methyl-3-methacryloyloxyethyloxetane, 3-methyl-3-acryloyloxyethyloxetane, 3-ethyl-3-methacryloyloxyethyloxetane, 3-ethyl-3-acryloyloxyethyloxetane and the like.

[0150] As the monomer (b3), a monomer having a tetrahydrofuryl group and a (meth)acryloyloxy group is more preferable. Examples of the monomer (b3) include tetrahydrofurfuryl acrylate (for example, Biscoat V#150, manufactured by Osaka Organic Chemical Industry Co., Ltd.), tetrahydrofurfuryl methacrylate and the like.

[0151] As the monomer (b), the monomer (b1) is preferable in that the reliability such as heat resistance and chemical resistance of the obtained color filter can be further improved. Further, the monomer (b1-2) is more preferable in that the storage stability of the colored curable resin composition is excellent.

[0152] Examples of the monomer (c) include (meth)acrylic acid esters such as methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, sec-butyl (meth)acrylate, tert-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, dodecyl (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate, cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-methylcyclohexyl (meth)acrylate, tricyclo[5.2.1.0 2,6 dec an-8-yl (meth)acrylate, tricyclo[5.2.1.0 2,6 decane-9-yl (meth)acrylate, tricyclo[5.2.1.0 2,6 decen-8-yl (meth) acrylate, tricyclo[5.2.1.0 2,6 decen-9-yl (meth)acrylate; dicyclopentyloxyethyl (meth)acrylate, isobornyl (meth)acrylate, adamantyl (meth)acrylate, allyl (meth)acrylate, propargyl (meth)acrylate, phenyl (meth)acrylate, naphthyl (meth)acrylate, benzyl (meth)acrylate, etc.; hydroxy group-containing (meth)acrylic acid esters such as 2-hydroxyethyl (meth)acrylate and 2-hydroxypropyl (meth)acrylate; dicarboxylic acid diesters such as diethyl maleate, diethyl fumarate, and diethyl itaconate; Bicyclo[2.2.1]hept-2-ene, 5-methylbicyclo[2.2.1]hept-2-ene, 5-ethylbicyclo[2.2.1]hept-2-ene, 5-hydroxybicyclo[2.2.1]hept-2-ene, 5-hydroxymethylbicyclo[2.2.1]hept-2-ene, 5-(2'-hydroxyethyl)bicyclo[2.2.1]hept-2-ene, 5-methoxy-bicyclo[2.2.1]hept-2-ene, 5-ethoxy-bicyclo[2.2.1]hept-2-ene, 5,6-dihydroxybicyclo[2.2.1]hept-2-ene, 5,6-di(hydroxymethyl)bicyclo[2.2.1]hept-2-ene, 5,6-di(2'-hydroxyethyl)bicyclo[2.2.1]hept-2-ene, 5,6-dimethoxy-bicyclo[2.2.1]hept-2-ene, 5,6-diethoxy-bicyclo[2.2.1]hept-2-ene, 5-hydroxy-5-methylbicyclo[2.2.1]hept-2-ene, 5-hydroxy-5-ethylbicyclo[2.2.1]hept-2-ene, 5-hydroxymethyl-5-methylbicyclo[2.2.1]hept-2-ene, 5-tert-butoxycarbonylbicyclo[2.2.1]hept-2-ene, 5-cyclohexyloxycarbonylbicyclo[2.2.1]hept-2-ene, 5-phenoxycarbonylbicyclo[2.2.1]hept-2-ene, 5,6-bis(tert-butoxycarbonyl)bicyclo[2.2.1]hept-2-ene and 5,6-bis(cyclohexyloxycarbonyl)bicyclo[2.2.1]hept-2-ene and other bicyclic unsaturated compounds; Dicarbonylimide derivatives such as N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, N-succinimidyl 3-maleimidobenzoate, N-succinimidyl 4-maleimidobutyrate, N-succinimidyl 6-maleimidocaproate, N-succinimidyl 3-maleimidopropionate and N-(9-acridinyl)maleimide; Vinyl group-containing aromatic compounds such as styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, vinyltoluene, and p-methoxystyrene; vinyl group-containing nitriles such as (meth)acrylonitrile; halogenated hydrocarbons such as vinyl chloride and vinylidene chloride; vinyl group-containing amides such as (meth)acrylamide; esters such as vinyl acetate; dienes such as 1,3-butadiene, isoprene, and 2,3-dimethyl-1,3-butadiene; and the like.

[0153] Among these, from the viewpoints of copolymerization reactivity and heat resistance, styrene, vinyltoluene, tricyclo[5.2.1.0 2,6 decane-8-yl (meth)acrylate, tricyclo[5. 2.1.0 2,6 decane-9-yl (meth)acrylate, tricyclo[5.2.1.0 2,6 decene-8-yl (meth)acrylate, tricyclo[5.2.1.0 2,6 decene -9-yl (meth)acrylate, N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, bicyclo[2.2.1]hept-2-ene, benzyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, and 2-ethylhexyl (meth)acrylate are preferable.

[0154] Specific examples of the resin (B) include 3,4-epoxycyclohexylmethyl (meth)acrylate / (meth)acrylic acid copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 decyl (meth)acrylate / (meth)acrylic acid copolymer, glycidyl (meth) acrylate / benzyl (meth)acrylate / (meth)acrylic acid copolymer, glycidyl (meth)acrylate / styrene / (meth)acrylic acid copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 decyl (meth)acrylate / (meth)acrylic acid / N -cyclohexylmaleimide copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6]Decyl (meth)acrylate / (meth)acrylic acid / N-cyclohexylmaleimide / 2-hydroxyethyl (meth)acrylate copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 ]Decyl (meth)acrylate / (meth)acrylic acid / vinyl toluene Copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 ]Decyl (meth) acrylic Acrylate / (meth)acrylic acid / 2-ethylhexyl (meth)acrylate copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 ]Decyl (meth)acrylate / Tricycl 5.2.1.0 2,6 ]Decenyl (meth)acrylate / (meth)acrylic acid / N-cyclohexyl Examples thereof include cyclohexylmaleimide copolymer, 3-methyl-3-(meth)acryloyloxymethyloxetane / (meth)acrylic acid / styrene copolymer, benzyl (meth)acrylate / (meth)acrylic acid copolymer, styrene / (meth)acrylic acid copolymer, and resins described in JP-A-9-106071, JP-A-2004-29518, and JP-A-2004-361455. Among these, the resin (B) is preferably a copolymer containing a structural unit derived from the monomer (a) and a structural unit derived from the monomer (b). Resin (B) may be a combination of two or more kinds. In this case, resin (B) contains at least It is preferable that the composition contains at least one copolymer containing a structural unit derived from the monomer (a) and a structural unit derived from the monomer (b), more preferably, the copolymer contains at least one copolymer containing a structural unit derived from the monomer (a) and a structural unit derived from the monomer (b1); It is more preferable that the copolymer contains at least one copolymer containing a structural unit derived from the monomer (a) and a structural unit derived from the monomer (b1-2), 3,4-Epoxytricyclo[5.2.1.0 2,6 ] Decyl (meth) acrylate / ( (Meth)acrylic acid copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 decyl (Meth)acrylate / (meth)acrylic acid / N-cyclohexylmaleimide / 2-hydroxyethyl (meth)acrylate copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 decyl (meth)acrylate / (meth)acrylic acid / vinyltoluene copolymer , 3,4-epoxytricyclo[5.2.1.0 2,6 decyl (meth)acrylate / ( (meth)acrylic acid / 2-ethylhexyl (meth)acrylate copolymer, and it is particularly preferable to contain one or more selected therefrom.

[0155] The weight average molecular weight (Mw) of resin (B) in terms of polystyrene is preferably 1,000 to 100,000, more preferably 1,000 to 50,000, still more preferably 1,000 to 30,000, particularly preferably 3,000 to 30,000, and especially preferably 5,000 to 30,000.

[0156] The dispersity [weight average molecular weight (Mw) / number average molecular weight (Mn)] of resin (B) is preferably 1 to 6, more preferably 1 to 5, and still more preferably 1 to 4.

[0157] The acid value (value in terms of solid content) of resin (B) is preferably 10 to 500 mg-KOH / g, more preferably 20 to 450 mg-KOH / g, still more preferably 20 to 400 mg-KOH / g, even more preferably 20 to 370 mg-KOH / g, still more preferably 30 to 370 mg-KOH / g, still more preferably 30 to 350 mg-KOH / g, particularly preferably 30 to 340 mg-KOH / g, and most preferably 30 to 335 mg-KOH / g. Here, the acid value is a value measured as the amount (mg) of potassium hydroxide required to neutralize 1 g of resin (B), and can be determined, for example, by titration using an aqueous potassium hydroxide solution.

[0158] In the colored curable resin composition, the content of the resin (B) is less than 100% by mass with respect to the total amount of the solid content. In a preferred embodiment of the present invention, the content of the resin (B) in the colored curable resin composition may be, for example, 1% by mass or more and 30% by mass or less, preferably 2% by mass or more and 25% by mass or less, more preferably 4% by mass or more and 20% by mass or less in the total amount of the solid content.

[0159] [Polymerizable compound (C)] The polymerizable compound (C) is a compound that can be polymerized by active radicals and / or an acid generated from a polymerization initiator (D), and is, for example, a compound having a polymerizable ethylenically unsaturated bond, etc., and preferably a (meth)acrylate compound.

[0160] Examples of the polymerizable compound having one ethylenically unsaturated bond include nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, 2-hydroxyethyl acrylate, N-vinylpyrrolidone, etc., and the above-mentioned monomer (a), monomer (b), and monomer (c).

[0161] Examples of the polymerizable compound having two ethylenically unsaturated bonds include 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, and 3-methylpentanediol di(meth)acrylate, etc.

[0162] Among them, the polymerizable compound (C) is preferably a polymerizable compound having three or more ethylenically unsaturated bonds. Examples of such polymerizable compounds include trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, tripentaerythritol octa(meth)acrylate, tripentaerythritol hepta(meth)acrylate, tetrapentaerythritol deca(meth)acrylate, tetrapentaerythritol nona(meth)acrylate, tris(2-(meth)acryloyloxyethyl) isocyanurate, ethylene glycol-modified pentaerythritol tetra(meth)acrylate, ethylene glycol-modified dipentaerythritol hexa(meth)acrylate, propylene glycol-modified pentaerythritol tetra(meth)acrylate, propylene glycol-modified dipentaerythritol hexa(meth)acrylate, caprolactone-modified pentaerythritol tetra(meth)acrylate, and caprolactone-modified dipentaerythritol hexa(meth)acrylate. Preferably, dipentaerythritol penta(meth)acrylate and dipentaerythritol hexa(meth)acrylate are mentioned.

[0163] The weight average molecular weight of the polymerizable compound (C) is preferably 50 or more and 4000 or less, more preferably 50 or more and 3500 or less, still more preferably 50 or more and 3000 or less, particularly preferably 150 or more and 2,900 or less, and especially preferably 250 or more and 1,500 or less.

[0164] The content rate of the polymerizable compound (C) is less than 100% by mass with respect to the total amount of solid components in the colored curable resin composition. In a preferred embodiment of the present invention, the content rate of the polymerizable compound (C) in the colored curable resin composition may be, for example, 1% by mass or more and 50% by mass or less, preferably 5% by mass or more and 45% by mass or less, more preferably 10% by mass or more and 40% by mass or less, and particularly preferably 15% by mass or more and 40% by mass or less, in the total amount of solid components.

[0165] [Polymerization initiator (D)] The polymerization initiator (D) is not particularly limited as long as it is a compound that can generate active radicals, acids, etc. by the action of light or heat and can initiate polymerization, and known polymerization initiators can be used. Examples of the polymerization initiator (D) include oxime compounds such as O-acyl oxime compounds, alkylphenone compounds, biimidazole compounds, triazine compounds, and acylphosphine oxide compounds.

[0166] Examples of the O-acyl oxime compound include N-benzoyloxy-1-(4-phenylsulfanylphenyl)butane-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)octane-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)-3-cyclopentylpropane-1-one-2-imine, N-acetoxy-1-(4-phenylsulfanylphenyl)-3-cyclopentylpropane-1-one-2-imine, N-acetoxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropane-1-one-2-imine, N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethane-1-imine, N-acetoxy-1-[9-ethyl-6-{2-methyl-4-(3,3-dimethyl-2,4-dioxacyclopentanylmethyloxy)benzoyl}-9H-carbazol-3-yl]ethane-1-imine, N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-3-cyclopentylpropane-1-imine, and N-benzoyloxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-3-cyclopentylpropane-1-one-2-imine. As the O-acyl oxime compound, commercially available products such as Irgacure OXE01 and OXE02 (manufactured by BASF) and N-1919 (manufactured by ADEKA Corporation) may also be used. Among them, as the O-acyl oxime compound, at least one selected from the group consisting of N-benzoyloxy-1-(4-phenylsulfanylphenyl)butane-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)octane-1-one-2-imine, and N-benzoyloxy-1-(4-phenylsulfanylphenyl)-3-cyclopentylpropane-1-one-2-imine is preferable, and N-benzoyloxy-1-(4-phenylsulfanylphenyl)octane-1-one-2-imine is more preferable.

[0167] Examples of the alkylphenone compound include 2-methyl-2-morpholino-1-(4-methylsulfanylphenyl)propan-1-one, 2-dimethylamino-1-(4-morpholinophenyl)-2-benzylbutan-1-one, 2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4-morpholinyl)phenyl]butan-1-one, and the like. As the alkylphenone compound, commercially available products such as Irgacure 369, 907, 379 (manufactured by BASF) may be used. Examples of the alkylphenone compound include 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]propan-1-one, 1-hydroxycyclohexyl phenyl ketone, oligomers of 2-hydroxy-2-methyl-1-(4-isopropenylphenyl)propan-1-one, α,α-diethoxyacetophenone, and benzyl dimethyl ketal.

[0168] Examples of the biimidazole compound include 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2,3-dichlorophenyl)-4,4',5,5'-tetraphenylbiimidazole (see, for example, JP-A-6-75372, JP-A-6-75373, etc.), 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(alkoxyphenyl)biimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(dialkoxyphenyl)biimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(trialkoxyphenyl)biimidazole (see, for example, JP-B-48-38403, JP-A-62-174204, etc.), and biimidazole compounds in which the phenyl groups at the 4,4',5,5'-positions are substituted with carboxyalkoxy groups (see, for example, JP-A-7-10913, etc.).

[0169] Examples of the triazine compound include 2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxynaphthyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-piperonyl-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxystyryl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(5-methylfuran-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(furan-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino-2-methylphenyl)ethenyl]-1,3,5-triazine, and 2,4-bis(trichloromethyl)-6-[2-(3,4-dimethoxyphenyl)ethenyl]-1,3,5-triazine, etc.

[0170] Examples of the acylphosphine oxide compound include 2,4,6-trimethylbenzoyldiphenylphosphine oxide, etc. Commercially available products such as Irgacure (registered trademark) 819 (manufactured by BASF) may also be used.

[0171] Furthermore, examples of the polymerization initiator (D) include benzoin compounds such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether; benzophenone compounds such as benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3',4,4'-tetra(tert-butylperoxycarbonyl)benzophenone, and 2,4,6-trimethylbenzophenone; quinone compounds such as 9,10-phenanthrenequinone, 2-ethylanthraquinone, and camphorquinone; 10-butyl-2-chloroacridone, benzyl, methyl phenylglyoxylate, and titanocene compounds, etc. These are preferably used in combination with a polymerization initiation aid (hereinafter sometimes referred to as polymerization initiation aid (D1)), particularly amines, which will be described later.

[0172] The polymerization initiator (D) is preferably a polymerization initiator containing at least one selected from the group consisting of alkylphenone compounds, triazine compounds, acylphosphine oxide compounds, oxime compounds, and biimidazole compounds, more preferably a polymerization initiator containing an oxime compound, and still more preferably a polymerization initiator containing an O-acryloyloxime compound.

[0173] In a preferred embodiment of the present invention, the content of the polymerization initiator (D) in the colored curable resin composition may be, for example, 1% by mass or more and 20% by mass or less, preferably 2% by mass or more and 15% by mass or less, and more preferably 5% by mass or more and 12% by mass or less in the total amount of the solid content.

[0174] [Polymerization Initiation Aid (D1)] The colored curable resin composition may contain a polymerization initiation aid (D1). The polymerization initiation aid (D1) is a compound or a sensitizer used to promote the polymerization of the polymerizable compound (C) whose polymerization has been initiated by the polymerization initiator (D). When the polymerization initiation aid (D1) is included, it is usually used in combination with the polymerization initiator (D). Examples of the polymerization initiation aid (D1) include amine compounds, alkoxyanthracene compounds, thioxanthone compounds, and carboxylic acid compounds.

[0175] Examples of the amine compound include triethanolamine, methyldiethanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 2-dimethylaminoethyl benzoate, 2-ethylhexyl 4-dimethylaminobenzoate, N,N-dimethylparatoluidine, 4,4'-bis(dimethylamino)benzophenone (commonly known as Michler's ketone), 4,4'-bis(diethylamino)benzophenone, and 4,4'-bis(ethylmethylamino)benzophenone. Preferably, 4,4'-bis(diethylamino)benzophenone is mentioned. Also, as the amine compound, commercially available products such as EAB-F (manufactured by Hodogaya Chemical Co., Ltd.) may be used.

[0176] Examples of the alkoxy anthracene compound include 9,10-dimethoxy anthracene, 2-ethyl-9,10-dimethoxy anthracene, 9,10-diethoxy anthracene, 2-ethyl-9,10-diethoxy anthracene, 9,10-dibutoxy anthracene, 2-ethyl-9,10-dibutoxy anthracene, and the like.

[0177] Examples of the thioxanthone compound include 2-isopropyl thioxanthone, 4-isopropyl thioxanthone, 2,4-diethyl thioxanthone, 2,4-dichloro thioxanthone, 1-chloro-4-propoxy thioxanthone, and the like.

[0178] Examples of the carboxylic acid compound include phenylsulfanyl acetic acid, methylphenylsulfanyl acetic acid, ethylphenylsulfanyl acetic acid, methylethylphenylsulfanyl acetic acid, dimethylphenylsulfanyl acetic acid, methoxyphenylsulfanyl acetic acid, dimethoxyphenylsulfanyl acetic acid, chlorophenylsulfanyl acetic acid, dichlorophenylsulfanyl acetic acid, N-phenyl glycine, phenoxy acetic acid, naphthylthio acetic acid, N-naphthyl glycine, naphthoxy acetic acid, and the like.

[0179] When using these polymerization initiation aids (D1), the content is preferably 0.1% by mass or more and 30% by mass or less, more preferably 1% by mass or more and 20% by mass or less, based on the total amount of the resin (B) and the polymerizable compound (C).

[0180] [Solvent (E)] The colored curable resin composition can contain a solvent (E). The solvent (E) is not particularly limited, and solvents commonly used in the art can be used. The solvent (E) includes, for example, ester solvents (solvents containing -CO-O- in the molecule and not containing -O-), ether solvents (solvents containing -O- in the molecule and not containing -CO-O-), ether ester solvents (solvents containing -CO-O- and -O- in the molecule), ketone solvents (solvents containing -CO- in the molecule and not containing -CO-O-), alcohol solvents (solvents containing OH in the molecule and not containing -O-, -CO- and -CO-O-), aromatic hydrocarbon solvents, amide solvents, dimethyl sulfoxide, and the like.

[0181] Examples of the ester solvent include methyl lactate, ethyl lactate, butyl lactate, methyl 2-hydroxyisobutyrate, ethyl acetate, n-butyl acetate, isobutyl acetate, pentyl formate, isopentyl acetate, butyl propionate, isopropyl butyrate, ethyl butyrate, butyl butyrate, methyl pyruvate, ethyl pyruvate, propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, cyclohexanol acetate, and γ-butyrolactone.

[0182] Examples of the ether solvent include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, 3-methoxy-1-butanol, 3-methoxy-3-methylbutanol, tetrahydrofuran, tetrahydropyran, 1,4-dioxane, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether, anisole, phenetole, and methyl anisole.

[0183] Examples of ether ester solvents include methyl methoxyacetate, ethyl methoxyacetate, butyl methoxyacetate, methyl ethoxyacetate, ethyl ethoxyacetate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, methyl 2-methoxypropionate, ethyl 2-methoxypropionate, propyl 2-methoxypropionate, methyl 2-ethoxypropionate, ethyl 2-ethoxypropionate, methyl 2-methoxy-2-methylpropionate, ethyl 2-ethoxy-2-methylpropionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, and dipropylene glycol methyl ether acetate, etc.

[0184] Examples of ketone solvents include 4-hydroxy-4-methyl-2-pentanone, acetone, 2-butanone, 2-heptanone, 3-heptanone, 4-heptanone, 4-methyl-2-pentanone, cyclopentanone, cyclohexanone, and isophorone, etc.

[0185] Examples of alcohol solvents include methanol, ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, propylene glycol, and glycerin, etc.

[0186] Examples of aromatic hydrocarbon solvents include benzene, toluene, xylene, and mesitylene, etc.

[0187] Examples of amide solvents include N,N-dimethylformamide, N,N-dimethylacetamide, and N-methylpyrrolidone, etc.

[0188] These solvents may be used in combination of two or more kinds.

[0189] Among the above solvents, from the viewpoints of coatability and drying property, an organic solvent having a boiling point at 1 atm of 120°C or higher and 180°C or lower is preferable. Preferred solvents include propylene glycol monomethyl ether acetate, ethyl lactate, propylene glycol monomethyl ether, ethyl 3-ethoxypropionate, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, 4-hydroxy-4-methyl-2-pentanone, and N,N-dimethylformamide. More preferred are propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, ethyl lactate, ethyl 3-ethoxypropionate, and 4-hydroxy-4-methyl-2-pentanone, etc.

[0190] The content of the solvent (E) is less than 100% by mass with respect to the total amount of the colored curable resin composition, preferably 70% by mass or more and 95% by mass or less, more preferably 75% by mass or more and 92% by mass or less. In other words, the total amount of the solid content of the colored composition is preferably 5% by mass or more and 30% by mass or less, more preferably 8% by mass or more and 25% by mass or less. In a preferred embodiment of the present invention, the content of the solvent (E) in the colored curable resin composition may be, for example, 70% by mass or more and 95% by mass or less with respect to the total amount of the colored curable resin composition, preferably 80% by mass or more and 90% by mass or less.

[0191] [Preparation of the colorant (A) containing liquid] When the colored curable resin composition contains the solvent (E), a colorant (A) containing liquid containing the colorant (A) and the solvent (E) may be prepared in advance, and then the colored curable resin composition may be prepared using the colorant (A) containing liquid. When the colorant (A) is not soluble in the solvent (E), the colorant (A) containing liquid can be prepared by dispersing and mixing the colorant (A) in the solvent (E). The colorant (A) containing liquid may contain part or all of the solvent (E) contained in the colored curable resin composition.

[0192] The content fraction of the solid content in the coloring agent (A) - containing liquid is less than 100% by mass with respect to the total amount of the coloring agent (A) - containing liquid, preferably 0.01% by mass or more and 99.99% by mass or less, more preferably 0.1% by mass or more and 99.9% by mass or less, still more preferably 0.1% by mass or more and 99% by mass or less, particularly preferably 1% by mass or more and 90% by mass or less, even more preferably 1% by mass or more and 80% by mass or less, especially preferably 1% by mass or more and 70% by mass or less, extremely preferably 1% by mass or more and 60% by mass or less, and most preferably 1% by mass or more and 50% by mass or less.

[0193] The content fraction of the coloring agent (A) in the coloring agent (A) - containing liquid is 100% by mass or less in the total amount of the solid content in the coloring agent (A) - containing liquid, preferably 1% by mass or more and 99% by mass or less, more preferably 1% by mass or more and 95% by mass or less, still more preferably 1% by mass or more and 90% by mass or less, particularly preferably 3% by mass or more and 80% by mass or less, even more preferably 5% by mass or more and 70% by mass or less. In a preferred embodiment of the present invention, the content fraction of the coloring agent (A) in the coloring agent (A) - containing liquid may be, for example, 40% by mass or more and 80% by mass or less, preferably 50% by mass or more and 70% by mass or less, in the total amount of the solid content.

[0194] The coloring agent (A) may, if necessary, be subjected to surface treatment using a rosin - treated coloring agent (A), a coloring agent (A) derivative into which an acidic group or a basic group has been introduced, graft treatment of the surface of the coloring agent (A) with a polymer compound, etc., micronization treatment by a sulfuric acid micronization method, etc., washing treatment with an organic solvent, water, etc. for removing impurities, removal treatment by an ion - exchange method for ionic impurities, etc. The particle size of the coloring agent (A) is preferably substantially uniform.

[0195] The coloring agent (A) can be made to be in a state of being uniformly dispersed in the coloring agent (A) - containing liquid by performing a dispersion treatment with a dispersant. The coloring agent (A) may be subjected to the dispersion treatment alone or a plurality of types may be mixed and subjected to the dispersion treatment.

[0196] Examples of the dispersant include surfactants, and any of cationic, anionic, nonionic, and amphoteric surfactants may be used. Specifically, surfactants such as polyester-based, polyamine-based, and acrylic-based surfactants can be mentioned. These dispersants may be used alone or in combination of two or more. When represented by trade names, examples of the dispersant include KP (manufactured by Shin-Etsu Chemical Co., Ltd.), Floren (manufactured by Kyoeisha Chemical Co., Ltd.), Solsperse (registered trademark) (manufactured by DuPont (Japan) Limited), EFKA (registered trademark) (manufactured by BASF), Ajisper (registered trademark) (manufactured by Ajinomoto Fine-Techno Co., Inc.), DISPERBYK (registered trademark) (manufactured by BYK-Chemie GmbH), and BYK (registered trademark) (manufactured by BYK-Chemie GmbH).

[0197] When the coloring agent (A) - containing liquid contains a dispersant, the amount of the dispersant (solid content) used is, for example, 0.01 part by mass or more and 10,000 parts by mass or less, preferably 0.01 part by mass or more and 5,000 parts by mass or less, more preferably 0.01 part by mass or more and 1,000 parts by mass or less, still more preferably 0.1 part by mass or more and 500 parts by mass or less, particularly preferably 0.1 part by mass or more and 300 parts by mass or less, even more preferably 1 part by mass or more and 300 parts by mass or less, and most preferably 5 parts by mass or more and 260 parts by mass or less with respect to 100 parts by mass of the coloring agent (A). When the amount of the dispersant used is within the above range, a coloring agent (A) - containing liquid with a more uniform dispersion state tends to be obtained. When the coloring agent (A) - containing liquid contains a pigment, the content rate of the dispersant is preferably 1 part by mass or more and 100 parts by mass or less, more preferably 10 parts by mass or more and 70 parts by mass or less, and still more preferably 20 parts by mass or more and 60 parts by mass or less with respect to 100 parts by mass of the total amount of the pigments.

[0198] When a coloring agent (A) - containing liquid containing the coloring agent (A) and the solvent (E) is prepared in advance and then the coloring agent (A) - containing liquid is used to prepare a color - curable resin composition, the coloring agent (A) - containing liquid may contain a part or all, preferably a part, of the resin (B) contained in the color - curable resin composition in advance. By including the resin (B) in advance, the dispersion stability of the coloring agent (A) - containing liquid can be further improved.

[0199] When the coloring agent (A)-containing liquid contains the resin (B), the content of the resin (B) is, for example, 0.01 parts by mass or more and 10,000 parts by mass or less, preferably 0.01 parts by mass or more and 5,000 parts by mass or less, more preferably 0.01 parts by mass or more and 1,000 parts by mass or less, still more preferably 0.1 parts by mass or more and 500 parts by mass or less, and particularly preferably 0.1 parts by mass or more and 300 parts by mass or less, based on 100 parts by mass of the coloring agent (A). In a preferred embodiment of the present invention, when the coloring agent (A)-containing liquid contains the resin (B), the content ratio of the resin (B) in the coloring agent (A)-containing liquid may be, for example, 10 parts by mass or more and 50 parts by mass or less, preferably 20 parts by mass or more and 40 parts by mass or less, based on 100 parts by mass of the coloring agent (A).

[0200] The color-curable resin composition may further contain a leveling agent (F) and an antioxidant (G).

[0201] [Leveling agent (F)] The color-curable resin composition may contain a leveling agent (F). Examples of the leveling agent (F) include silicone-based surfactants, fluorine-based surfactants, and silicone-based surfactants having fluorine atoms. These may have a polymerizable group in the side chain.

[0202] Examples of the silicone-based surfactant include surfactants having a siloxane bond in the molecule. Specifically, Toray Silicone DC3PA, SH7PA, DC11PA, SH21PA, SH28PA, SH29PA, SH30PA, SH8400 (trade name: manufactured by Toray Dow Corning Co., Ltd.), KP321, KP322, KP323, KP324, KP326, KP340, KP341 (manufactured by Shin-Etsu Chemical Co., Ltd.), TSF400, TSF401, TSF410, TSF4300, TSF4440, TSF4445, TSF4446, TSF4452, and TSF4460 (manufactured by Momentive Performance Materials Japan G.K.) etc. are included.

[0203] Examples of the fluorosurfactant include surfactants having a fluorocarbon chain in the molecule. Specifically, Fluorad (registered trademark) FC430, FC431 (manufactured by Sumitomo 3M Limited), Megafac (registered trademark) F142D, F171, F172, F173, F177, F183, F554, R30, RS-718-K (manufactured by DIC Corporation), F-Top (registered trademark) EF301, EF303, EF351, EF352 (manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd.), Surfron (registered trademark) S381, S382, SC101, SC105 (manufactured by Asahi Glass Co., Ltd.), and E5844 (manufactured by Daikin Fine Chemical Research Institute Co., Ltd.) etc. are included.

[0204] Examples of the silicone surfactant having a fluorine atom include surfactants having a siloxane bond and a fluorocarbon chain in the molecule. Specifically, Megafac (registered trademark) R08, BL20, F475, F477, and F443 (manufactured by DIC Corporation) etc. are included.

[0205] When the leveling agent (F) is contained, its content is usually 0.0001% by mass or more and 5% by mass or less, preferably 0.0001% by mass or more and 3% by mass or less, more preferably 0.0001% by mass or more and 2% by mass or less, and still more preferably 0.0001% by mass or more and 1% by mass or less with respect to the total amount of the colored curable resin composition. In a preferred embodiment of the present invention, the content of the leveling agent (F) may be, for example, 0.001% by mass or more and 1% by mass or less, preferably 0.005% by mass or more and 0.05% by mass or less with respect to the total amount of the colored curable resin composition. When the content of the leveling agent (F) is within the above range, the flatness of the color filter can be improved.

[0206] [Antioxidant (G)] The colored curable resin composition may contain an antioxidant (G). From the viewpoint of improving the heat resistance and light resistance of the colorant, it is preferable to use an antioxidant alone or in combination of two or more kinds. The antioxidant is not particularly limited as long as it is an antioxidant generally used industrially, and a phenolic antioxidant, a phosphorus-based antioxidant, a sulfur-based antioxidant, etc. can be used.

[0207] Examples of phenolic antioxidants include Irganox 1010 (Irganox 1010: pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], manufactured by BASF), Irganox 1076 (Irganox 1076: octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, manufactured by BASF), Irganox 1330 (Irganox 1330: 3,3’,3’’,5,5’,5’’-hexa-tert-butyl-a,a’,a’’-(mesitylene-2,4,6-triyl)tri-p-cresol, manufactured by BASF), Irganox 3114 (Irganox 3114: 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, manufactured by BASF), Irganox 3790 (Irganox 3790: 1,3,5-tris((4-tert-butyl-3-hydroxy-2,6-xylyl)methyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, manufactured by BASF), Irganox 1035 (Irganox 1035: thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], manufactured by BASF), Irganox 1135 (Irganox1135: benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy, C7-C9 branched alkyl ester, manufactured by BASF), Irganox 1520L (Irganox 1520L: 4,6-bis(octylthiomethyl)-o-cresol, manufactured by BASF), Irganox 3125 (Irganox 3125, manufactured by BASF), Irganox 565 (Irganox 565: 2,4-bis(n-octylthio)-6-(4-hydroxy 3’,5’-di-tert-butylanilino)-1,3,5-triazine, manufactured by BASF), Adeka Stab AO-80 (Adeka Stab AO-80: 3,9-bis(2-(3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy)-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro(5,5) Examples include undecane (manufactured by ADEKA CORPORATION), Sumilizer BHT (manufactured by Sumitomo Chemical Company, Limited), Sumilizer GA-80 (manufactured by Sumitomo Chemical Company, Limited), Sumilizer GS (manufactured by Sumitomo Chemical Company, Limited), Cyanox 1790 (manufactured by Cytec Industries Inc.), and vitamin E (manufactured by Eisai Co., Ltd.).,

[0208] Examples of phosphorus-based antioxidants include Irgafos 168 (Irgafos 168: tris(2,4-di-tert-butylphenyl) phosphite, manufactured by BASF), Irgafos 12 (Irgafos 12: tris[2-[[2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphin-6-yl]oxy]ethyl]amine, manufactured by BASF), Irgafos 38 (Irgafos 38: bis(2,4-bis(1,1-dimethylethyl)-6-methylphenyl) ethyl ester phosphite, manufactured by BASF), Adeka Stab 329K (manufactured by ADEKA CORPORATION), Adeka Stab PEP36 (manufactured by ADEKA CORPORATION), Adeka Stab PEP-8 (manufactured by ADEKA CORPORATION), Sandstab P-EPQ (manufactured by Clariant), Weston 618 (Weston618, manufactured by GE), Weston 619G (Weston 619G, manufactured by GE), Ultranox 626 (manufactured by GE), and Sumilizer GP (Sumilizer GP: 6-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-tert-butyldibenz[d,f][1.3.2]dioxaphosphepine) (manufactured by Sumitomo Chemical Company, Limited), etc.

[0209] Examples of sulfur-based antioxidants include dialkyl thiodipropionate compounds such as dilauryl, dimyristyl, or distearyl thiodipropionate, and polyol β-alkyl mercaptopropionate ester compounds such as tetrakis[methylene(3-dodecylthio)propionate]methane, etc.

[0210] [Other Components] The colored curable resin composition may contain additives known in the art, such as fillers, other polymer compounds, adhesion promoters, light stabilizers, chain transfer agents, etc., as necessary. Examples of the adhesion promoter include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(2-methoxyethoxy)silane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-sulfanylpropyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, N-2-(aminoethyl)-3-aminopropylmethyldiethoxysilane, N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, N-2-(aminoethyl)-3-aminopropylmethyldiethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, and N-phenyl-3-aminopropyltriethoxysilane.

[0211] [Method for Producing Colored Curable Resin Composition] The colored curable resin composition can be prepared, for example, by mixing a colorant (A), a resin (B), a polymerizable compound (C), a polymerization initiator (D), and, as necessary, a polymerization initiation aid (D1), a solvent (E), a leveling agent (F), an antioxidant (G), and other components. The mixing can be carried out by known or conventional devices and conditions. The colorant (A) is preferably used in the form of a dispersion liquid of the colorant (A) which is previously mixed with a part or all of the solvent (E) and dispersed using a bead mill or the like until the average particle diameter of the colorant (A) becomes about 0.2 μm or less. At this time, a part or all of the dispersant and the resin (B) may be blended as necessary. The colorant (A) is preferably dissolved in a part or all of the solvent (E) in advance to prepare a solution. Further, it is preferable to filter the solution through a filter having a pore size of about 0.01 μm or more and 1 μm or less. It is preferable to filter the colored curable resin composition after mixing through a filter having a pore size of about 0.01 μm or more and 10 μm.

[0212] <Reflection film> The display device is not particularly limited, but may include a light reflection member for irradiating the light of the light source toward the mixture or the laminated structure. The reflection film is not particularly limited, and may include any suitable known material such as a mirror, a film of reflective particles, a reflective metal film, or a reflector.

[0213] <Diffusion film> The display device is not particularly limited, but may include a diffusion film for diffusing the light of the light source or the light emitted from the mixture. The diffusion film may include any diffusion film known in the art such as an amplification diffusion film.

[0214] <Brightness enhancement part> The display device according to the present invention is not particularly limited, but may include a brightness enhancement part that reflects and returns a part of the light in the direction in which the light is transmitted.

[0215] <Prism sheet> The prism sheet typically has a base material part and a prism part. Note that the base material part may be omitted depending on the adjacent member. The prism sheet can be bonded to an adjacent member via any suitable adhesive layer (e.g., an adhesive layer, a pressure-sensitive adhesive layer). The prism sheet is configured by arranging a plurality of unit prisms that protrude on the side opposite to the viewing side (the back side) in parallel. By arranging the convex part of the prism sheet toward the back side, the light transmitted through the prism sheet is likely to be condensed. Also, if the convex part of the prism sheet is arranged toward the back side, compared with the case where the convex part is arranged toward the viewing side, the light that is reflected without entering the prism sheet is less, and a display with high luminance can be obtained.

[0216] <Light guide plate> As the light guide plate, any suitable light guide plate can be used. For example, a light guide plate having a lens pattern formed on the back side so that light from the lateral direction can be deflected in the thickness direction, or a light guide plate having a prism shape or the like formed on the back side and / or the viewing side is used.

[0217] <Inter-element medium material layer> The display device according to the present invention is not particularly limited, but may include a layer made of one or more medium materials on the optical path between adjacent elements (layers). Examples of the one or more medium materials include, but are not limited to, vacuum, air, gas, optical materials, adhesives, optical adhesives, glass, polymers, solids, liquids, gels, cured materials, optical coupling materials, refractive index matching or refractive index mismatching materials, refractive index gradient materials, cladding or anti-cladding materials, spacers, silica gel, luminance enhancement materials, scattering or diffusing materials, reflection or anti-reflection materials, wavelength selectivity materials, wavelength selectivity anti-reflection materials, or other suitable media known in the art, and any suitable materials may be included.

[0218] As specific examples of the display device, for example, those provided with a wavelength conversion material for an EL display or a liquid crystal display can be mentioned. Specifically, a color conversion layer (B) is disposed between a light source (A) and a light guide plate along an end face (side face) of the light guide plate, and a backlight (an edge-lit backlight) that emits white light is used, and a color filter (C) is disposed on the light guide plate side; a display device in which the color conversion layer (B) is installed on the light guide plate, and a backlight (a surface-mounted backlight) that emits, as white light, light irradiated from a light source (A) disposed on an end face (side face) of the light guide plate through the light guide plate to the color conversion layer (B), and a color filter (C) is disposed on the color conversion layer (B); a display device in which a quantum dot composition is installed near a light-emitting portion of the light source (A) as the color conversion layer (B), and a backlight (an on-chip backlight) that emits, as white light, irradiated light, and a color filter (C) is disposed on the color conversion layer (B), etc. can be mentioned.

[0219] Preferably, in the optical path of light from the light source (A), the light source (A), the color conversion layer (B), and the color filter (C) are arranged and / or laminated in this order.

[0220] FIG. 3 is a schematic cross-sectional view of a display device according to an embodiment of the present invention. The display device 100 shown in FIG. 3 includes a light source (A) 110, a color conversion layer (B) 120, and a color filter (C) 130. As shown in the drawing, the display device 100 can further include a light guide plate 140.

[0221] Preferably, the display device may have a coverage ratio (hereinafter also referred to as the coverage ratio for simplicity) of the color gamut of Rec. ITU-R BT.2020 of, for example, 54% or more and an extraction efficiency of 30% or more, preferably a coverage ratio of 65% or more and an extraction efficiency of 32% or more. Note that the chromaticity coordinates (x, y) of red in Rec. ITU-R BT.2020 are (0.708, 0.292), the chromaticity coordinates (x, y) of green are (0.170, 0.797), and the chromaticity coordinates (x, y) of blue are (0.131, 0.046).

[0222] <Display> As shown in FIG. 4, the display 200 of this embodiment includes a liquid crystal panel 201 and the aforementioned display device 100 in this order from the viewing side. The liquid crystal panel 201 typically includes a liquid crystal cell, a viewing-side polarizing plate disposed on the viewing side of the liquid crystal cell, and a back-side polarizing plate disposed on the back side of the liquid crystal cell. The display may further include any other appropriate members.

[0223] <Liquid crystal panel> The above liquid crystal panel typically includes a liquid crystal cell, a viewing-side polarizing plate disposed on the viewing side of the liquid crystal cell, and a back-side polarizing plate disposed on the back side of the liquid crystal cell. The viewing-side polarizing plate and the back-side polarizing plate can be arranged such that their absorption axes are substantially orthogonal or parallel to each other.

[0224] [Liquid crystal cell] The liquid crystal cell has a pair of substrates and a liquid crystal layer as a display medium sandwiched between the substrates. In a general configuration, a color filter and a black matrix are provided on one of the substrates, and a switching element for controlling the electro-optical characteristics of the liquid crystal, a scanning line for supplying a gate signal to the switching element, a signal line for supplying a source signal, a pixel electrode, and a counter electrode are provided on the other substrate. The interval (cell gap) between the above substrates can be controlled by a spacer or the like. On the side of the above substrates in contact with the liquid crystal layer, an alignment film made of, for example, polyimide can be provided.

[0225] [Polarizing plate] The polarizing plate typically has a polarizer and protective layers disposed on both sides of the polarizer. The polarizer is typically an absorption-type polarizer. As the above polarizer, any appropriate polarizer can be used. For example, a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, or an ethylene-vinyl acetate copolymer-based partially saponified film, to which a dichroic substance such as iodine or a dichroic dye is adsorbed and uniaxially stretched, and a polyene-based oriented film such as a dehydrated product of polyvinyl alcohol or a dehydrochlorinated product of polyvinyl chloride. Among these, a polarizer obtained by adsorbing a dichroic substance such as iodine on a polyvinyl alcohol-based film and uniaxially stretching it has a high polarization dichroism ratio and is particularly preferable.

Example

[0226] Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples. In the examples, “%” and “parts” are mass % and parts by mass, respectively, unless otherwise specified.

[0227] <Measurement of Spectrum Curve I(x)> Using an electron-cooled back-illuminated high S / N fiber multi-channel spectrometer QE65Pro (manufactured by Ocean Optics, Inc.) equipped with an optical fiber, the spectrum at the front (0°) was measured for a display device in which an optical conversion layer and a color filter were arranged in this order on a light source. At that time, the distance between the display device and the detection unit was set to 30 mm. The maximum peak wavelength [nm] Peak and the full width at half maximum [nm] FWHM in each of the three wavelength ranges in the spectrum curve I(x): 380 nm or more and less than 495 nm, 495 nm or more and 585 nm or less, and more than 585 nm and 780 nm or less are shown in Table 1. b、g、r and the full width at half maximum [nm] FWHM b、g、r are shown in Table 1. <Spectrum Curve T b、g、r (x) Measurement> An ultraviolet-visible near-infrared spectrophotometer (UV-3600; manufactured by Shimadzu Corporation) equipped with an integrating sphere was used. As the measurement substrate, one in which a color filter was directly formed on a glass substrate was used. The background was obtained using a glass substrate. The maximum peak wavelength [nm] of the spectrum curve T(x) is shown in Table 1. b、g、r (x) is shown in Table 1.

[0228] <Measurement of Chromaticity> The spectral curve T measured above b、g、r (x) was used to determine the chromaticity (x, y) and intensity, respectively. The chromaticity (x, y) is the xy chromaticity coordinates (x, y) in the CIE XYZ color system.

[0229] <Measurement of the peak wavelength of the light source> The emission spectrum of the light source was measured with the spectrometer used for the measurement of the above spectral curve I(x), and the peak wavelength of the light source was read from the measured emission spectrum.

[0230] <Measurement of the thickness of the color conversion layer> It was measured with a film thickness measuring device (DEKTAK3; manufactured by Nippon Vacuum Technology Co., Ltd.).

[0231] <Measurement of the emission spectrum of quantum dots> It was measured using an absolute PL quantum yield measuring device (manufactured by Hamamatsu Photonics, product name C9920-02, excitation light 450 nm, room temperature, under atmosphere). The maximum peak wavelength (λmax) [nm] and the full width at half maximum [nm] were determined from the obtained emission spectrum.

[0232] <Measurement of the emission spectrum of perovskite fluorescent particles> It was measured using an absolute PL quantum yield measuring device (manufactured by Hamamatsu Photonics, product name C9920-02, excitation light 450 nm, room temperature, under atmosphere). The maximum peak wavelength (λmax) [nm] and the full width at half maximum [nm] were determined from the obtained emission spectrum.

[0233] <Measurement of the weight average molecular weight (Mw) and the number average molecular weight (Mn)> The measurement of the polystyrene-equivalent weight average molecular weight (Mw) and the number average molecular weight (Mn) of the resin (B) was carried out under the following conditions by the GPC method. Apparatus: HLC-8120GPC (manufactured by Tosoh Corporation) Column: TSK-GEL G2000HXL Column temperature: 40 °C Solvent: Tetrahydrofuran Flow rate: 1.0 mL / min Solid content concentration of the analysis sample: 0.001 to 0.01 mass% Injection volume: 50 μL Detector: RI Standard substance for calibration: TSK STANDARD POLYSTYRENE F-40, F-4, F-288, A-2500, A-500 (manufactured by Tosoh Corporation) The ratio (Mw / Mn) of the weight average molecular weight (Mw) and the number average molecular weight (Mn) in terms of polystyrene obtained above was defined as the dispersity.

[0234] <Determination of α> Using the spectral curve I(x) obtained above, α under condition (I) was determined according to the following formula. Here, the following formula h(x) represents the ratio of the intensity at the corresponding wavelength of the spectral curve I(x) to the region of the spectral curve I(x) in the wavelength ranges 380 nm ≦ x < 495 nm, 495 nm ≦ x ≦ 585 nm, and 585 nm ≦ x ≦ 780 nm when the intensity in the wavelength ranges 440 < x < 460, 520 < x < 540, and 620 < x < 650 of the spectral curve I(x) is set to zero. [Number]

[0235] <Determination of β> Using the spectral curve T b、g、r (x) of each measured color filter, β under condition (II) was determined according to the following formula. Here, the following formula j(x) represents a function where the light transmittance is zero in the wavelength ranges 380 nm ≦ x < 440 nm, 460 nm < x < 520 nm, 540 nm < x < 620 nm, and 650 nm < x ≦ 780 nm, and the light transmittance is equal to the light transmittance at the corresponding wavelength of the spectral curve T b、g、r (x) in the wavelength ranges 440 nm ≦ x ≦ 460 nm, 520 nm ≦ x ≦ 540 nm, and 620 nm ≦ x ≦ 650 nm. [Number]

[0236] <Coverage rate> When the area of the overlapping part of the color gamut surrounded by the coordinates calculated from the xy chromaticity coordinates (x, y) measured according to the above-mentioned "Measurement of Chromaticity" and the color gamut surrounded by the coordinates of BT2020 is Y1, and the color gamut surrounded by the coordinates of BT2020 is Y2, the following formula: Y = (Y1 / Y2)×100 is calculated from.

[0237] <Extraction efficiency> The integrated intensities Zb, Zg, and Zr of the emission spectra from the blue color filter, green color filter, and red color filter arranged in the display device were measured respectively, and the extraction efficiency Z was calculated according to the following formula. Z = [(Zr + Zg + Zb) / 3Zb]×100

[0238] <Performance evaluation value> It is calculated according to the following formula. Performance value = (Y×Z) / 100 Y: Coverage rate Z: Extraction efficiency

[0239] <Synthesis Example 1> Resin (F2) An appropriate amount of nitrogen was flowed into a flask equipped with a reflux condenser, a dropping funnel, and a stirrer, and the atmosphere was replaced with a nitrogen atmosphere. 371 parts of propylene glycol monomethyl ether acetate was placed, and it was heated to 85 °C while stirring. Next, a mixed solution prepared by dissolving 225 parts of a mixture of 54 parts of acrylic acid, 3,4-epoxytricyclo[5.2.1.02,6]decane-8-yl acrylate and 3,4-epoxytricyclo[5.2.1.02,6]decane-9-yl acrylate (the content ratio is 50:50 in molar ratio), and 81 parts of vinyltoluene (isomer mixture) in 80 parts of propylene glycol monomethyl ether acetate was added dropwise into the flask over 4 hours. On the other hand, a solution prepared by dissolving 30 parts of a polymerization initiator 2,2-azobis(2,4-dimethylvaleronitrile) in 160 parts of propylene glycol monomethyl ether acetate was added dropwise over 5 hours. After the dropping of the initiator solution was completed, it was held at 85 °C for 4 hours and then cooled to room temperature to obtain a copolymer (resin F2) solution. The solid content of the resin F2 solution was 37%, and the weight average molecular weight was 10,600.

[0240] <Preparation of Light Source> Light source 1: Blue light-emitting diode having a maximum peak wavelength at 443 nm Light source 2: Blue light-emitting diode having a maximum peak wavelength at 460 nm

[0241] <Preparation of Red Fluorescent Particles> Red fluorescent particle 1: Quantum dot 1 (CdSe / ZnSeS), maximum peak wavelength: 640 nm, full width at half maximum: 24 nm Red fluorescent particle 2: Quantum dot 2 (CdSe / ZnSeS), maximum peak wavelength: 635 nm, full width at half maximum: 24 nm Red fluorescent particle 3: Quantum dot 3 (CdSe / ZnSeS), maximum peak wavelength: 646 nm, full width at half maximum: 28 nm Red fluorescent particle 4: Quantum dot 4 (CdSe / ZnSeS), maximum peak wavelength: 608 nm, full width at half maximum: 44 nm

[0242] <Preparation of Red Fluorescent Particle Dispersion> A toluene dispersion containing 10% of red fluorescent particles 1 to 4 and a dispersant BYK-LP N6919 were mixed so that the solid content ratio was 1:1 to obtain quantum dot dispersions Q1 to 4. The concentration of the toluene dispersion was calculated from the remaining amount after heating to 550 °C at a heating rate of 5 °C / min by TG-DTA measurement of the mixture after removing toluene.

[0243] <Preparation of Green Fluorescent Particles> Green Fluorescent Particle 1: Polysilazane-coated perovskite 1 (CsPbBr3), maximum peak wavelength: 535 nm, full width at half maximum 20 nm Green Fluorescent Particle 2: Polysilazane-coated perovskite 2 (FAPbBr3), maximum peak wavelength: 540 nm, full width at half maximum 19 nm Green Fluorescent Particle 3: Polysilazane-coated perovskite 3 (FAPbBr3), maximum peak wavelength: 530 nm, full width at half maximum 23 nm Green Fluorescent Particle 5: Quantum dot 5 (CdSe / ZnSeS), maximum peak wavelength: 542 nm, full width at half maximum 35 nm Green Fluorescent Particle 6: Quantum dot 6 (CdSe / ZnS), maximum peak wavelength: 527 nm, full width at half maximum 34 nm

[0244] <Preparation of Green Fluorescent Particle Dispersion> Toluene dispersions P1 to 3 containing 10% of green fluorescent particles 1 to 3 were prepared. The concentration of the toluene dispersion was calculated from the remaining amount after heating to 550 °C at a heating rate of 5 °C / min by TG-DTA measurement of the mixture after removing toluene.

[0245] A toluene dispersion containing 10% of green fluorescent particle 5 and a dispersant BYK-LP N6919 were mixed so that the solid content ratio was 1:1 to obtain a green fluorescent particle dispersion Q5.

[0246] <Preparation of Scattering Agent Dispersion> 60 parts of titanium oxide particles, 5 parts equivalent to the solid content of the dispersant BYK-LP N6919, and PGMEA were mixed so that the total was 100 parts, and a material obtained by sufficiently dispersing the titanium oxide particles using a bead mill was used.

[0247] <Preparation of Color Conversion Composition> Each material was mixed so as to have the solid content ratio shown in Table 1, and quantum dot compositions 1 to 6 were prepared.

[0248]

Table 1

[0249] IBXA: Isobornyl acrylate TMPTA: Trimethylolpropane triacrylate

[0250] <Fabrication of color conversion layer> A color conversion layer was fabricated with the configuration shown in Table 2. It was bar-coated on the lower substrate so that the color conversion layer had a predetermined thickness, dried at 80 °C for 3 minutes, then the upper substrate was laminated, and exposed to UV at 200 mJ through the substrate to be cured. When the upper substrate was not used, the color conversion layer was cured by exposure in a nitrogen atmosphere.

[0251]

Table 2

[0252] <Preparation of pigment dispersions Ph-1 to Ph-4> Pigments were mixed with the compositions and ratios shown in Table 3 below to obtain pigment dispersions Ph-1 to Ph-4.

[0253]

Table 3

[0254] Blue pigment (P1): C.I. Pigment Blue 15:6 Green pigment (P2): C.I. Pigment Green 36 Yellow pigment (P3): C.I. Pigment Yellow 150 Red pigment (P4): C.I. Pigment Red 254 Pigment dispersant: Solvent-based pigment dispersant Resin (F3): Methacrylic acid / benzyl methacrylate copolymer (copolymerization ratio (mass ratio): 30 / 70, Mw: 1.2×10 4 Solvent (K1): Propylene glycol monomethyl ether acetate (PGMEA) Solvent (K2): Propylene glycol 1-monomethyl ether (PGME)

[0255] <Preparation of colored curable resin composition> The colored curable resin compositions (D-b1), (D-b2), (D-g1), and (D-r1) for forming a light absorption layer were obtained by mixing the respective components in Table 4. In Table 4, the number of parts of the resin indicates the value in terms of solid content.

[0256]

Table 4

[0257] Polymerizable compound (G2): Dipentaerythritol hexaacrylate, trade name: KAYARAD (registered trademark) DPHA: manufactured by Nippon Kayaku Co., Ltd. Polymerization initiator (H2): N-benzoyloxy-1-(4-phenylsulfanylphenyl)octane-1-one-2-imine, trade name: Irgacure (registered trademark) OXE-01: manufactured by BASF Leveling agent (J2): Polyether-modified silicone oil, trade name: Toray silicone SH8400, manufactured by Toray Dow Corning Co., Ltd.

[0258] <Example 1> On a 5 cm square glass substrate (Eagle 2000; manufactured by Corning), the colored curable resin composition (D-r1) for a color filter was applied by spin coating, and then prebaked at 100°C for 3 minutes to form a red curable resin composition layer. With respect to the substrate on which this red curable resin composition layer was formed, using an exposure machine (TME-150RSK; manufactured by Topcon Corporation), in an air atmosphere, 100 mJ / cm 2It was irradiated with light at an exposure amount (based on 365 nm), and after development, a post-bake was performed at 230 °C for 20 minutes to obtain a cured film. This cured film was used as a red color filter (C-r1). Similarly, a green color filter (C-g1) was produced on the substrate on which the red color filter (C-r1) was produced using a green curable resin composition (D-g1), and then a blue color filter (C-b1) was produced using a blue curable resin composition (D-b1). Thus, a color filter (C) was produced.

[0259] As shown in the display device production conditions shown in Table 5, it was installed on the light source (A) such that the color filter (C) was disposed on the color conversion layer (B), and a display device was produced. The evaluation results are shown in Table 5.

[0260] <Examples 2 to 6, Comparative Examples 1 and 2> A display device was produced in the same manner as in Example 1 except that the materials and film thicknesses shown in Table 5 were used. The evaluation results are shown in Table 5.

[0261]

Table 5

Explanation of Reference Signs

[0262] 10, 20, 30 non-overlapping regions, 40 overlapping region, 100 display device, 110 light source, 120 color conversion layer, 130 color filter, 200 display, 201 liquid crystal panel.

Claims

1. A display device comprising a light source (A), a color conversion layer (B), and a color filter (C), wherein the color conversion layer (B) is a layer containing a cured product of a curable resin composition containing quantum dots (B-r) that emit red light, the curable resin composition further contains a polymerizable compound and a scattering agent, the color filter (C) has a blue color filter (C-b), a green color filter (C-g), and a red color filter (C-r), and satisfies the following conditions (I) and (II). (I) α ≦ 1.80 (II) β ≧ 63.0 [However, α＝α ｂ ＋α ｇ ＋α ｒ 、 β＝β ｂ ＋β ｇ ＋β ｒ is defined as follows.] In the spectral curve I(x) obtained by plotting the intensity I of the light emitted from the color conversion layer (B) against the wavelength x when irradiated with light from the light source (A), when a pulse function that becomes 0 in the wavelength ranges 380 nm ≦ x < 440 nm, 460 nm < x < 520 nm, 540 nm < x < 620 nm, and 650 nm < x ≦ 780 nm and becomes equal to the maximum intensity of the spectral curve I(x) in the wavelength ranges 440 nm ≦ x ≦ 460 nm, 520 nm ≦ x ≦ 540 nm, and 620 nm ≦ x ≦ 650 nm is represented by the function f(x), α ｂ represents the ratio of the area that does not overlap with the area of the function f(x) in the region of the spectral curve I(x) in the wavelength range of 380 nm ≤ x < 495 nm, α ｇ represents the ratio of the area that does not overlap with the area of the function f(x) in the region of the spectral curve I(x) within the wavelength range of 495 nm ≤ x ≤ 585 nm, α ｒ represents the ratio of the area that does not overlap with the area of the function f(x) in the region of the spectral curve I(x) in the wavelength range of 585 nm < x ≤ 780 nm. Light transmittance T of the cyan color filter (C-b) ｂ The spectral curve T ｂ (x), Light transmittance T of the green color filter (C-g) ｇ The spectral curve T ｇ (x) obtained by plotting against the wavelength x, and Light transmittance T of the red color filter (C-r) ｒ The spectral curve T ｒ (x) obtained by plotting against the wavelength x, when a pulse function that becomes 0 in the wavelength ranges 380 nm ≦ x < 440 nm, 460 nm < x < 520 nm, 540 nm < x < 620 nm, and 650 nm < x ≦ 780 nm and has a light transmittance of 100% in the wavelength ranges 440 nm ≦ x ≦ 460 nm, 520 nm ≦ x ≦ 540 nm, and 620 nm ≦ x ≦ 650 nm is represented by the function g(x), β ｂ represents, in the wavelength range of 440 nm ≤ x ≤ 460 nm, the area of the region where the region of the spectral curve T ｂ (x) overlaps with the region of the function g(x). β ｇ represents, in the wavelength range of 520 nm ≤ x ≤ 540 nm, the area of the region where the region of the spectral curve T ｇ (x) overlaps with the region of the function g(x). β ｒ represents the area of the region where the region of the spectral curve T ｒ (x) and the region of the function g(x) overlap in the wavelength range 620 nm ≤ x ≤ 650 nm.

2. The display device according to claim 1, wherein the light source (A) emits light having a peak at a wavelength of 600 nm or less.

3. The display device according to claim 1 or 2, wherein the light emitted from the color conversion layer (B) when irradiated with light from the light source (A) is white light.

4. The display device according to any one of claims 1 to 3, wherein the spectral curve I(x) has peaks in the wavelength ranges 440 nm to 460 nm, 520 nm to 540 nm, and 620 nm to 650 nm, and the full width at half maximum of each peak is 20 nm to 80 nm.

5. The display device according to any one of claims 1 to 4, wherein the quantum dots (B-r) that emit red light contain at least one selected from the group consisting of particles of an indium compound and particles of a cadmium compound.

6. The thickness of the color conversion layer (B) is 1 μm or more and 300 μm or less. The display device according to any one of claims 1 to 5.

7. The spectral curve T ｂ (x) is a display device according to any one of claims 1 to 6, having a peak in a wavelength range of 440 nm to 460 nm.

8. The spectral curve T ｇ The display device according to any one of claims 1 to 7, wherein (x) has a peak in a wavelength range of 520 nm to 540 nm.

9. The spectral curve T ｒ (x) is a display device according to any one of claims 1 to 8, having a peak in a wavelength range of 620 nm to 660 nm.

10. The coverage rate of the color gamut of Rec. ITU-R BT. 2020 is 54% or more, and the extraction efficiency is 30% or more. The display device according to any one of claims 1 to 9.

11. A display including the display device according to any one of claims 1 to 10.

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