Display device

Abstract

A display device comprising a light source (A), a color conversion layer (B) containing quantum dots (B-r) that emit red light, and a color filter (C) having a blue color filter (C-b), a green color filter (C-g), and a red color filter (C-r), α ≤ 1.80, and β ≥ 63.0.

Description

Technical Field

[0001] This invention relates to a display device comprising a light source, a color conversion layer, and a color filter. Background Technology

[0002] Patent document 1 discloses a display device comprising: a light conversion unit containing quantum dots that emit green light, and a green color filter.

[0003] Patent document 2 discloses a display device comprising a film composed of a mixture of a perovskite compound having luminescence and an indium compound having luminescence or a cadmium compound having luminescence.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: International Publication No. 2015 / 045735

[0007] Patent Document 2: International Publication No. 2018 / 168638 Summary of the Invention

[0008] Previously proposed display devices with light sources, color conversion layers, and color filters sometimes could not simultaneously achieve a wide color gamut and excellent extraction efficiency.

[0009] The purpose of this invention is to achieve both a wide color gamut and high extraction efficiency in a display device that includes a light source, a color conversion layer, and a color filter.

[0010] The present invention provides the following display device.

[0011] [1] A display device comprising a light source (A), a color conversion layer (B), and a color filter (C),

[0012] The aforementioned color conversion layer (B) contains quantum dots (Br) that emit red light.

[0013] The aforementioned color filter (C) includes a blue color filter (Cb), a green color filter (Cg), and a red color filter (Cr).

[0014] The following conditions (I) and (II) must be met.

[0015] (I) α≤1.80

[0016] (II) β≥63.0

[0017] [in,

[0018] α=α b +α g +α r ,

[0019] β=β b +β g +β r .

[0020] In the spectral curve I(x) obtained by plotting the intensity I of the light emitted from the color conversion layer (B) relative to the wavelength x when light from the light source (A) is applied,

[0021] When the pulse function, which is 0 in the wavelength ranges 380nm≤x<440nm, 460nm<x<520nm, 540nm<x<620nm, and 650nm<x≤780nm, and has a value equal to the maximum intensity of the aforementioned spectral curve I(x) in the wavelength ranges 440nm≤x≤460nm, 520nm≤x≤540nm, and 620nm≤x≤650nm, is represented by the function f(x),

[0022] α b This represents the proportion of the region in the wavelength range of 380 nm ≤ x < 495 nm that does not overlap with the region of the function f(x) in the region of the above spectral curve I(x).

[0023] α g This represents the proportion of the region in the wavelength range of 495 nm ≤ x ≤ 585 nm that does not overlap with the region of the function f(x) in the region of the above spectral curve I(x).

[0024] α r This represents the proportion of the region in the region of the above spectral curve I(x) that does not overlap with the region of the function f(x) in the wavelength range of 585nm < x ≤ 780nm.

[0025] The transmittance T of the blue filter (Cb) b The spectral curve T obtained by plotting relative to wavelength x b (x)

[0026] The transmittance T of the green filter (Cg) g The spectral curve T obtained by plotting relative to wavelength x g (x), and

[0027] The transmittance T of the red color filter (Cr) r The spectral curve T obtained by plotting relative to wavelength x r In (x),

[0028] When the pulse function with transmittance of 0 in the wavelength ranges 380nm≤x<440nm, 460nm<x<520nm, 540nm<x<620nm, and 650nm<x≤780nm, and with transmittance of 100% in the wavelength ranges 440nm≤x≤460nm, 520nm≤x≤540nm, and 620nm≤x≤650nm is represented by the function g(x),

[0029] β b The above spectral curve T represents the wavelength range of 440nm ≤ x ≤ 460nm. b The area of ​​the region where the region of function g(x) overlaps with the region of function g(x).

[0030] β g The above spectral curve T represents the wavelength range of 520 nm ≤ x ≤ 540 nm. g The area of ​​the region where the region of function g(x) overlaps with the region of function g(x).

[0031] β r The above spectral curve T represents the wavelength range of 620nm ≤ x ≤ 650nm. r The area of ​​the region where the region of function g(x) overlaps with the region of function g(x).

[0032] [2] According to the display device described in [1], the light source (A) emits light with a peak at a wavelength of less than 600 nm.

[0033] [3] According to the display device described in [1] or [2], the light emitted from the color conversion layer (B) when illuminated by the light source (A) is white light.

[0034] [4] The display device according to any one of [1] to [3], wherein the above-mentioned spectral curve I(x) has peaks in wavelength ranges of 440nm to 460nm, 520nm to 540nm and 620nm to 650nm, and the half-width of each peak is 20nm to 80nm.

[0035] [5] The display device according to any one of [1] to [4], wherein the quantum dot (Br) emitting red light comprises at least one selected from particles of indium compounds and particles of cadmium compounds.

[0036] [6] The display device according to any one of [1] to [5], wherein the thickness of the color conversion layer (B) is 1 μm to 300 μm.

[0037] [7] The display device according to any one of [1] to [6], wherein the above-mentioned spectral curve T b (x) has a peak in the wavelength range of 440 nm to 460 nm.

[0038] [8] The display device according to any one of [1] to [7], wherein the above-mentioned spectral curve T g (x) has a peak in the wavelength range of 520 nm to 540 nm.

[0039] [9] The display device according to any one of [1] to [8], wherein the above-mentioned spectral curve T r (x) has a peak in the wavelength range of 620 nm to 650 nm.

[0040]

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

[0041]

[11] A display comprising any one of the display devices described in [1] to

[10] .

[0042] According to the present invention, a wide color gamut and excellent extraction efficiency can be achieved in a display device that includes a light source, a color conversion layer and a color filter. Attached Figure Description

[0043] Figure 1 This is a simplified diagram used to illustrate the conditions (I) of the present invention.

[0044] Figure 2 This is a simplified diagram illustrating condition (II) of the present invention.

[0045] Figure 3 This is a simplified cross-sectional view of a display device illustrating one embodiment of the present invention.

[0046] Figure 4 This is a simplified cross-sectional view of a display according to one embodiment of the present invention. Detailed Implementation

[0047] <Display Device>

[0048] 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 causes quantum dots (Br) that emit red light (hereinafter, sometimes referred to as quantum dots (Br)) to emit light when light is emitted from the color conversion layer (B) when light is emitted from the light source (A), and the light is extracted by the color filter (C).

[0049] "Emitting blue light" means emitting all light that is considered blue (all light with intensity in the blue wavelength region, such as 380nm to 495nm), and is not limited to emitting a single wavelength. "Emitting green light" means emitting all light that is considered green (all light with intensity in the green wavelength region, such as 495nm to 585nm), and is not limited to emitting a single wavelength. "Emitting red light" means emitting all light that is considered red (all light with intensity in the red wavelength region, such as 585nm to 780nm), and is not limited to emitting a single wavelength.

[0050] The display device may also include layers such as a light guide plate, a reflective film, a diffusion film, a brightness enhancement section, a prism sheet, and a dielectric material layer between elements, as described later.

[0051] Display devices can achieve both a wide color gamut and excellent extraction efficiency while simultaneously satisfying conditions (I) and (II). Previously proposed display devices, which incorporate a light source, a color conversion layer, and a color filter, have generally struggled to achieve both a wide color gamut and excellent extraction efficiency. This is attributed to the fact that blue, green, and red light obtained through the color filter can contain intermediate wavelengths, thus failing to fully realize color reproducibility. Furthermore, excluding these intermediate wavelengths reduces brightness, resulting in insufficient extraction efficiency. Research has shown that by setting a specific pulse function, the smaller the proportion of the spectral curve of light emitted from the color conversion layer that exceeds this pulse function, and the higher the proportion of the spectral curve of transmitted light from the color filter that covers the pulse function region, the easier it is to exclude intermediate wavelengths and simultaneously achieve high brightness.

[0052] <Condition(I)>

[0053] Regarding condition (I), refer to Figure 1 Please provide an explanation. Figure 1 In this context, (a) represents the impulse function f(x). Figure 1 In the diagram, (b) represents the spectral curve I(x) of the light emitted from the color conversion layer (B). Figure 1 In (c), the slashes represent regions 10, 20, and 30 within the region of the spectral curve I(x) that do not overlap with the region of the impulse function f(x). Figure 1 In (c), the non-overlapping region 10 is α. b The region that does not overlap is α. g The region that does not overlap is α. r The region is defined as follows: the region of the spectral curve I(x) is the area between the spectral curve and the horizontal axis, and the region of the impulse function f(x) is the area between the waveform of the impulse function f(x) and the horizontal axis.

[0054] αb α g and α r When the total is set as α, α ≤ 1.80. From the viewpoint of color gamut and extraction efficiency, α ≤ 1.60 is preferred, more preferably α ≤ 1.45, further preferably α ≤ 1.40, particularly preferably α ≤ 1.35, even more particularly preferably α ≤ 1.30, further particularly preferably α ≤ 1.25, and typically 0.50 ≤ α. b α g and α r The values ​​are preferably 0.80 or less, and more preferably 0.60 or less. α can be calculated according to [number 2] shown in the Example section below.

[0055] The pulse function f(x) is a function that is 0 in the wavelength ranges of 380nm≤x<440nm, 460nm<x<520nm, 540nm<x<620nm and 650nm<x≤780nm, and has a value equal to the maximum intensity of the spectral curve I(x) in the wavelength ranges of 440nm≤x≤460nm, 520nm≤x≤540nm and 620nm≤x≤650nm. From the viewpoint of color gamut and extraction efficiency, it is preferable that the pulse function f(x) is 0 in the wavelength ranges of 380nm≤x<445nm, 460nm<x<525nm, 535nm<x<630nm and 650nm<x≤780nm, and has a value equal to the maximum intensity of the spectral curve I(x) in the wavelength ranges of 445nm≤x≤460nm, 525nm≤x≤535nm and 630nm≤x≤650nm.

[0056] When light from the light source (A) is applied, the light emitted from the color conversion layer (B) 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–460 nm, 520 nm–540 nm, and 620 nm–650 nm, with a full width at half maximum (FWHM) of 20 nm–80 nm for each peak. More preferably, it has peaks in the wavelength ranges of 445 nm–455 nm, 525 nm–535 nm, and 625 nm–645 nm, with a FWHM of 20 nm–50 nm for each peak. The spectral curve I(x) is measured using the method described in the Examples section below. The FWHM of the peaks in the spectral curve I(x) is further preferably 20 nm–40 nm, and particularly preferably 20 nm–30 nm.

[0057] <Condition (II)>

[0058] For condition (II), refer to Figure 2 Let's take the green color filter (Cg) as an example. Figure 2 In this context, (a) represents the impulse function g(x). Figure 2(b) in the figure represents the spectral curve T of the green filter (Cg). g (x), Figure 2 In (c), the spectral curve T is represented by the slash. g The area β of the region where the region of (x) overlaps with the region of the impulse function g(x) is 40. g The same applies to the blue (Cb) and red (Cr) color filters. Spectral curve T g The region of g(x) is the region between the spectral curve and the horizontal axis, and the region of the pulse function g(x) is the region between the waveform of the pulse function g(x) and the horizontal axis.

[0059] Color filter (C) in β b β g and β r When the total is set as β, β ≥ 63.0. From the viewpoint of color gamut and extraction efficiency, β ≥ 63.5 is preferred, more preferably β ≥ 64.0, further preferably β ≥ 64.5, particularly preferably β ≥ 65.0, and typically β ≤ 70.0. The β of the color filter (C) b β g and β r The value is preferably 10 or more, and more preferably 15 or more. β can be calculated based on [number 3] shown in the Example section below.

[0060] The pulse function g(x) is 0 in the wavelength ranges 380nm≤x<440nm, 460nm<x<520nm, 540nm<x<620nm and 650nm<x≤780nm, and has 100% transmittance in the wavelength ranges 440nm≤x≤460nm, 520nm≤x≤540nm and 620nm≤x≤650nm. From the viewpoint of color gamut and extraction efficiency, it is preferable that the pulse function g(x) is 0 in the wavelength ranges 380nm≤x<445nm, 455nm<x<525nm, 535nm<x<625nm and 645nm<x≤780nm, and has 100% transmittance in the wavelength ranges 445nm≤x≤455nm, 525nm≤x≤535nm and 625nm≤x≤645nm.

[0061] From the perspective of color gamut and extraction efficiency, the spectral curve T b (x) Preferably, it has a peak in the wavelength range of 440 nm to 460 nm, and more preferably, it has a peak in the wavelength range of 445 nm to 455 nm.

[0062] From the perspective of color gamut and extraction efficiency, the spectral curve T g (x) Preferably, it has a peak in the wavelength range of 520 nm to 540 nm, and more preferably, it has a peak in the wavelength range of 525 nm to 535 nm.

[0063] From the perspective of color gamut and extraction efficiency, the spectral curve T r (x) Preferably, it has a peak in the wavelength range of 620 nm to 650 nm, and more preferably, it has a peak in the wavelength range of 625 nm to 645 nm.

[0064] Spectral curve T b (x), spectral curve T g (x) and spectral curve T r (x) The determination was performed by the method described in the Example 1 section below.

[0065] The impulse function f(x) and the impulse function g(x) can be 0 in the same wavelength range and have the same waveform.

[0066] To satisfy conditions (I) and (II) at the same time, for example, methods such as adjusting the peak wavelength and peak intensity of the light emitted from the light source, adjusting the luminous intensity and peak wavelength of the color conversion layer, and adjusting the chromaticity and transmittance of the color filter can be given.

[0067] Specific examples of methods for adjusting the luminescence intensity, peak wavelength, etc. of the color conversion layer include methods for adjusting the type, average particle size and content of quantum dots and fluorescent particles in the quantum dot composition described later, the type and content of polymers, and methods for adjusting the thickness of the color conversion layer.

[0068] Specific examples of methods for adjusting the chromaticity and transmittance of a color filter include methods for adjusting the type and content of colorant and resin in the color-curing resin composition described later, and methods for adjusting the thickness of the color filter.

[0069] <Light Source>

[0070] The light source (A) is a light source that emits light capable of causing the quantum dots (Br) in the color conversion layer (B) to emit light. For example, known light sources such as blue light-emitting diodes (LEDs), lasers, and ELs can be used. From the viewpoint of color gamut and extraction efficiency, the light source (A) is preferably a light source that emits light with a peak below 600 nm, and more preferably a light source that emits blue light. The peak of the light emitted from the light source (A) is measured using the method described in the Examples section below. The light source (A) is more preferably a light source with a peak in the wavelength range of 440 nm to 460 nm. The full width at half maximum (FWHM) of the peak of the light source (A) is preferably 20 nm to 80 nm.

[0071] The light source (A) can be combined with the color conversion layer (B) to be used as a backlight. The backlight can also have a light guide plate.

[0072] <Color Conversion Layer>

[0073] The color conversion layer (B) preferably converts light from the light source (A) into white light. The color conversion layer (B) can be a component that absorbs a portion of the light from the light source (A) to emit red light and transmits another portion of the light from the light source (A) to convert primary light into white light. White light refers to light composed of at least a mixture of blue light, red light, and green light.

[0074] The color conversion layer (B) contains quantum dots (Br) that emit red light.

[0075] The thickness of the color conversion layer (B) can be, for example, 0.01 μm to 1000 mm, preferably 0.1 μm to 10 mm, more preferably 1 μm to 1 mm, and even more preferably 10 μm to 150 μm. The thickness of the color conversion layer (B) is measured by the method described in the Example section below.

[0076] The color conversion layer (B) can be a layer containing a cured resin composition containing quantum dots (Br) (hereinafter also referred to as a quantum dot composition). The color conversion layer (B) can be a single-layer structure consisting only of a layer containing the cured quantum dot composition, or it can be a multilayer structure consisting of multiple layers. When the color conversion layer (B) is a multilayer structure, it can have two or more layers containing the cured quantum dot composition, or it can have layers other than the layers containing the cured quantum dot composition. Examples of layers other than the layers containing the cured quantum dot composition include any layer such as a substrate, a barrier layer, and a light scattering layer, which will be described later.

[0077] [Quantum dot]

[0078] The emission spectrum (peak) of red light emitted from quantum dots (Br) preferably has a maximum value in the wavelength range of 610 nm to 750 nm. When the maximum value is found in the wavelength range of 610 nm to 750 nm, the color purity of the red light corresponding to the aforementioned peak is particularly high, thus further improving the brightness of the red light in the display device. More preferably, the aforementioned maximum value exists in the wavelength range of 620 nm to 650 nm. The emission spectrum of quantum dots (Br) is measured using the method described in the Examples section below.

[0079] The emission spectrum of quantum dots (Br) preferably has a full width at half maximum (FWHM) of 10 nm to 80 nm. When the FWHM is below 80 nm, the color purity of red light emitted from the color conversion layer (B) increases, thus further improving the brightness of red light in the display device. On the other hand, the FWHM of the red light emission spectrum is more preferably 10 nm to 45 nm, and even more preferably 10 nm to 35 nm. The FWHM of the quantum dot (Br) emission spectrum is preferably 20 nm to 80 nm.

[0080] Examples of indium compounds include group III-V indium compounds, group III-VI indium compounds, and group I-III-VI indium compounds, with group III-V indium compounds being preferred, and indium compounds containing phosphorus in group V being more preferred.

[0081] Examples of cadmium compounds include, for example, group II-VI and group II-V cadmium compounds.

[0082] Indium compounds do not contain cadmium, and cadmium compounds do not contain indium.

[0083] [Group III-V indium compounds]

[0084] Group III-V indium compounds are compounds containing elements of Group III and Group V, and are compounds containing at least indium. Here, Group III refers to Group 13 of the periodic table, and Group V refers to Group 15 of the periodic table (the same applies hereinafter). It should be noted that in this specification, "periodic table" refers to a long-period periodic table.

[0085] Group III-V indium compounds can be binary, ternary, or quaternary systems.

[0086] Binary III-V group indium compounds can be any compounds containing indium (the first element) and a group V element (the second element), such as InN, InP, InAs and InSb.

[0087] Ternary III-V group indium compounds can be compounds containing two elements: indium (the first element) and an element selected from group V (the second element), or compounds containing two elements selected from group III (the first element), one of which is indium, and one element selected from group V (the second element).

[0088] Examples of ternary III-V group indium compounds include InPN, InPAs, InPSb, and InGaP.

[0089] Indium compounds of the quaternary group III-V are compounds containing two elements selected from group III (element 1), one of which is indium, and two elements selected from group V (element 2).

[0090] Examples of quaternary III-V group indium compounds include InGaPN, InGaPAs, and InGaPSb.

[0091] Semiconductors containing group III-V indium compounds may contain elements outside of groups 13 and 15 of the periodic table (excluding cadmium) as dopants.

[0092] [Group III-VI indium compounds]

[0093] Group III-VI indium compounds are compounds containing elements from Group III and Group VI, and must contain at least indium. Here, Group VI refers to Group 16 of the periodic table (the same applies below).

[0094] Group III-VI indium compounds can be binary, ternary, or quaternary systems.

[0095] Binary III-VI group indium compounds can be compounds that contain indium (the first element) and a group VI element (the second element), such as In2S3, In2Se3 and In2Te3.

[0096] Ternary III-VI group indium compounds can be compounds containing two elements: indium (the first element) and an element selected from group VI (the second element), or compounds containing two elements selected from group III (the first element), one of which is indium, and one element selected from group VI (the second element).

[0097] Examples of ternary III-VI group indium compounds include InGaS3, InGaSe3, InG1Te3, In2SSe2, and In2TeSe2.

[0098] Indium compounds of the quaternary group III-VI are compounds containing two elements selected from group III (element 1), one of which is indium, and two elements selected from group VI (element 2).

[0099] Examples of quaternary group III-VI indium compounds include InGaSSe2, InGaSeTe2, and InGaSTe2.

[0100] Semiconductors containing group III-VI indium compounds may contain elements other than those in groups 13 and 16 of the periodic table (excluding cadmium) as dopants.

[0101] [Group I-III-VI indium compounds]

[0102] Group I-III-VI indium compounds are compounds containing elements from Group I, Group III, and Group VI, and must contain at least indium. Here, Group I refers to Group 11 of the periodic table (the same applies below).

[0103] Group I-III-VI indium compounds can be either ternary or quaternary.

[0104] Ternary I-III-VI group indium compounds are compounds containing elements selected from Group I (element 1), indium (element 2), and elements selected from Group VI (element 3).

[0105] Examples of ternary group I-III-VI indium compounds include CuInS2.

[0106] Semiconductors containing group I-III-VI indium compounds may contain elements other than those in groups 11, 13 and 16 of the periodic table (excluding cadmium) as dopants.

[0107] From the viewpoint of obtaining sufficient luminescence intensity, indium compounds are preferably InP, CuInS2, InNP and GaInNP, with InP and CuInS2 being more preferred.

[0108] [Group II-VI cadmium compounds]

[0109] Group II-VI cadmium compounds are compounds containing elements of Group II and Group VI, and must contain at least cadmium. Here, Group II refers to Group 2 or Group 12 of the periodic table (the same applies below).

[0110] Group II-VI cadmium compounds can be binary, ternary, or quaternary systems.

[0111] Binary II-VI group cadmium compounds are those containing cadmium (element 1) and group 16 elements (element 2), such as CdS, CdSe and CdTe.

[0112] Ternary II-VI group cadmium compounds can be compounds containing two elements: cadmium (the first element) and an element selected from group VI (the second element), or compounds containing two elements selected from group II (the first element), one of which is cadmium, and one element selected from group VI (the second element).

[0113] Examples of ternary II-VI group cadmium compounds include CdSeS, CdSeTe, CdSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, and CdHgTe.

[0114] Group II-VI cadmium compounds in the quaternary system are compounds containing two elements selected from Group II (element 1), one of which is designated as cadmium, and two elements selected from Group VI (element 2).

[0115] Examples of quaternary II-VI group cadmium compounds include CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, and CdHgSTe.

[0116] Semiconductors containing group II-VI cadmium compounds may contain elements other than those in groups 2, 12 and 16 of the periodic table (excluding indium) as dopants.

[0117] [Group II-V cadmium compounds]

[0118] Group II-V cadmium compounds are compounds that contain both Group II and Group V elements, and that contain at least cadmium.

[0119] Group II-V cadmium compounds can be binary, ternary, or quaternary systems.

[0120] Binary II-V group cadmium compounds are those containing cadmium (the first element) and a group V element (the second element). Examples include Cd3P2, Cd3As2, and Cd3N2.

[0121] Ternary II-V group cadmium compounds can be compounds containing two elements: cadmium (the first element) and an element selected from group V (the second element), or compounds containing two elements selected from group II (the first element), one of which is cadmium, and one element selected from group V (the second element).

[0122] Examples of ternary II-V group cadmium compounds include Cd3PN, Cd3PAs, Cd3AsN, Cd2ZnP2, Cd2ZnAs2, and Cd2ZnN2.

[0123] A quaternary II-V group cadmium compound is a compound comprising two elements selected from group II (element 1) and two elements selected from group V (element 2), one of which is designated as cadmium.

[0124] Examples of quaternary group II-V cadmium compounds include CdZnPN, CdZnPAs, and Cd2ZnAsN.

[0125] Semiconductors containing group II-V cadmium compounds may contain elements other than those in groups 2, 12 and 15 of the periodic table (excluding indium) as dopants.

[0126] From the viewpoint of obtaining sufficient luminescence intensity, cadmium compounds are 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, even more preferably CdS, CdSe, ZnCdS, ZnCdSSe, and CdZnSeS, and particularly preferably CdSe and CdZnSeS.

[0127] From the viewpoint of luminescence intensity and durability, particles of indium compounds and cadmium compounds can have an inorganic protective layer on their surface. This inorganic protective layer can be two or more layers, or it can be a single layer. Examples of inorganic materials suitable for forming the inorganic protective layer include, but are not limited to, semiconductors with band gaps larger than those of indium and / or cadmium compounds. The inorganic protective layer can be formed, for example, from known inorganic materials such as ZnS.

[0128] Quantum dots (Br) can be synthesized through wet chemical processes, metal-organic chemical vapor deposition (MOCVD), or molecular beam epitaxy (MBE). Wet chemical processes involve adding precursors to an organic solvent to promote particle growth. During crystal growth, the organic solvent naturally settles on the surface of the quantum dot crystal, acting as a dispersant to regulate crystal growth. Therefore, compared to vapor-phase deposition methods such as MOCVD and MBE, it is easier to control the growth of nanoparticles using a cheaper process.

[0129] [Green fluorescent particles]

[0130] In addition to quantum dots (Br), the color conversion layer (B) may further contain green fluorescent particles (Bg) that emit green light. When the color conversion layer (B) contains green fluorescent particles (Bg), of the light incident on the color conversion layer (B) from the light source (A), part is converted into red light by the quantum dots (Br) and emitted from the color conversion layer (B), another part is converted into green light by the green fluorescent particles (Bg) and emitted from the color conversion layer (B), and yet another part passes directly through the color conversion layer (B) as light from the light source (A). Thus, the light from the light source (A), red light, and green light mix, and therefore there is a tendency for white light to be emitted from the color conversion layer (B).

[0131] The emission spectrum of green fluorescent particles (Bg) preferably has a full width at half maximum (FWHM) of 10 nm to 80 nm. When the FWHM is 30 nm or less, the color purity of the green light is high, thus further improving the brightness of the green light in the display device. On the other hand, from the viewpoint of synthesizing green fluorescent particles, there is an advantageous trend when the FWHM is 10 nm or more. The FWHM of the emission spectrum of the green light is more preferably 10 nm to 60 nm, further preferably 10 nm to 40 nm, even more preferably 10 nm to 30 nm, and particularly preferably 20 nm to 30 nm.

[0132] The emission spectrum (peak) of the 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 peak value is present in the wavelength range of 500 nm to 560 nm, the color purity of the green light corresponding to the peak is particularly high, thus further improving the brightness of the green light in the display device. More preferably, the peak value exists in the wavelength range of 520 nm to 540 nm. The emission spectrum emitted from the green fluorescent particles (Bg) is measured by the method described in the Examples section below.

[0133] [Perovskite fluorescent particles]

[0134] As a preferred example of green fluorescent particles (Bg), perovskite fluorescent particles can be cited.

[0135] Perovskite fluorescent particles (Bg) are particles of compounds with a perovskite-type crystal structure composed of A, B and X (hereinafter also referred to as perovskite compounds).

[0136] A is the composition of each vertex of the hexahedron centered at B in a perovskite crystal structure, and is a monovalent cation.

[0137] X represents the composition of each vertex of the octahedron centered at B in the perovskite crystal structure, and is an anion selected from halide ions and thiocyanate ions.

[0138] B is the component located at the center of the hexahedron with A at the vertices and the octahedron with X at the vertices in the perovskite crystal structure, and is a metal ion.

[0139] As a perovskite compound composed of A, B, and X, there are no particular limitations; it can be a compound with any of the following structures: three-dimensional, two-dimensional, or quasi-two-dimensional.

[0140] In the case of a three-dimensional structure, the composition of perovskite compounds is ABX (3+δ) express.

[0141] In the case of a two-dimensional structure, the composition of perovskite compounds is A2BX. (4+δ) express.

[0142] δ is a number that can be appropriately changed according to the charge balance of B, ranging from -0.7 to 0.7.

[0143] In this specification, the perovskite crystal structure can be confirmed based on the X-ray diffraction pattern.

[0144] In the case of the above-mentioned perovskite-type crystal structure with a three-dimensional structure, in the X-ray diffraction pattern, a peak from (hkl) = (001) is typically seen at a position of 2θ = 12–18°, or a peak from (hkl) = (110) is seen at a position of 2θ = 18–25°. More preferably, a peak from (hkl) = (001) is seen at a position of 2θ = 13–16°, or a peak from (hkl) = (110) is seen at a position of 2θ = 20–23°.

[0145] In the case of the above-mentioned perovskite-type crystal structure with a two-dimensional structure, in the X-ray diffraction pattern, a peak from (hkl) = (002) is usually seen at a position of 2θ = 1 to 10°, and more preferably at a position of 2θ = 2 to 8°.

[0146] The perovskite compound is preferably a perovskite compound represented by the following general formula (1).

[0147] [Number 1]

[0148] ABX (3+δ) (-0.7≤δ≤0.7) (1)

[0149] In the formula, A is the composition of each vertex of the hexahedron centered at B in the perovskite crystal structure and is a monovalent cation.

[0150] As a monovalent cation, cesium ions, organic ammonium ions, or amidonium ions are preferred, and cesium ions and CH3NH3 are more preferred. + (Also known as methylammonium ion), formamidonium ion, etc.

[0151] In perovskite compounds, B represents the component located at the center of the hexahedron with A at its vertices and the octahedron with X at its vertices in the perovskite crystal structure, and is a metal ion. The metal ion of component B can be an ion composed of one or more selected from monovalent metal ions, divalent metal ions, and trivalent metal ions. B preferably contains divalent metal ions, and more preferably contains one or more metal ions selected from lead and tin.

[0152] In perovskite compounds, X represents the composition of each vertex of the octahedron centered on B in the perovskite crystal structure, and represents one or more anions selected from halide ions and thiocyanate ions.

[0153] X can be appropriately selected based on the desired emission wavelength, and preferably, the ratio of chloride ions, bromide ions, and iodide ions can be appropriately selected based on the emission wavelength. For example, it can be a combination of bromide ions and chloride ions, or a combination of bromide ions and iodide ions.

[0154] From the viewpoint of maintaining the crystal structure well, the average particle size of the perovskite compound is preferably 1 nm or more, more preferably 2 nm or more, and even more preferably 3 nm or more. In addition, from the viewpoint of making the perovskite compound particles less prone to sedimentation, the average particle size is preferably 10 μm or less, more preferably 1 μm or less, and even more preferably 500 nm or less.

[0155] The aforementioned upper and lower limits can be combined arbitrarily.

[0156] From the viewpoint of preventing the particles of the perovskite compound from settling and to maintaining the crystal structure well, the average particle size of the perovskite compound is preferably 1 nm to 10 μm, more preferably 2 nm to 1 μm, and even more preferably 3 nm to 500 nm.

[0157] The fluorescence peaks of the perovskite compounds were determined using the assay methods described in the Examples section below.

[0158] Methods for manufacturing perovskite compound particles include, for example, a method that includes a step of dissolving component B, component X, and component A in a solvent to obtain a solution, and a step of mixing the obtained solution with a solvent whose solubility in the perovskite compound is lower than that in the step of obtaining the solution; and a method that includes a step of adding component B, component X, and component A to a solvent at high temperature to dissolve them and obtain a solution, and a step of cooling the obtained solution.

[0159] [Substrate]

[0160] From the viewpoint of extracting light during emission, the substrate included in the color conversion layer (B) preferably has light transmittance. As the substrate, known materials such as thermoplastic resin films like polyethylene terephthalate and glass can be used. For example, a layer containing a cured quantum dot composition can be disposed on the substrate in the color conversion layer (B).

[0161] [Barrier Layer]

[0162] The color conversion layer (B) may include a barrier layer to protect the cured layer containing the quantum dot composition from water vapor in the outside air and atmospheric air. There are no particular limitations on the barrier layer; however, from the viewpoint of extracting emitted light, a light-transmitting barrier layer is preferred. For example, known barrier layers such as polymers like polyethylene terephthalate and glass films can be used.

[0163] [Light scattering layer]

[0164] From the viewpoint of effectively absorbing incident light, the color conversion layer (B) may include a light scattering layer. There are no particular limitations on the light scattering layer, but from the viewpoint of extracting emitted light, a light scattering layer with light transmittance is preferred. For example, known light scattering layers such as silica particles or amplification diffusion films can be used.

[0165] [Manufacturing method of color conversion layer]

[0166] Examples of manufacturing methods for the color conversion layer (B) include: a manufacturing method that includes a step of preparing a quantum dot composition, a step of coating the quantum dot composition onto a substrate, and a step of removing the solvent; a manufacturing method that includes a step of producing a film containing a cured quantum dot composition and a step of bonding the resulting film onto a substrate; and a manufacturing method that includes a step of preparing a quantum dot composition, a step of coating the quantum dot composition onto a substrate, and a step of polymerizing a polymerizable compound.

[0167] As a method for coating a quantum dot composition onto a substrate, known coating methods such as gravure coating, rod coating, printing, spraying, spin coating, dipping, and molding can be used.

[0168] In the process of bonding a cured film containing a quantum dot composition to a substrate, any adhesive can be used. There are no particular restrictions on the adhesive as long as it does not dissolve the quantum dots, and any known adhesive can be used.

[0169] The manufacturing method of the color conversion layer (B) can also be a manufacturing method that further includes a step of laminating any film. Examples of the arbitrary film to be laminated include barrier films, light scattering films, reflective films, and diffusion films. Any adhesive can be used in the step of laminating any film. There are no particular restrictions on the adhesive as long as it does not dissolve the quantum dots; known adhesives can be used.

[0170] [Quantum dot composition]

[0171] The color conversion layer (B) can be formed from the quantum dot composition described above. The quantum dot composition may contain, in addition to quantum dots (Br), the aforementioned green fluorescent particles (Bg), a solvent, a polymerizable compound, or a polymer.

[0172] 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, out of 100% by mass of the quantum dot composition. Furthermore, from the viewpoint of obtaining good luminescence intensity, it 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 above-mentioned upper and lower limits can be combined arbitrarily.

[0173] The content of quantum dots (Br) in the quantum dot composition is typically 0.0001% to 50% by mass in 100% by mass of the quantum dot composition, preferably 0.0001% to 5% by mass, and more preferably 0.0005% to 2% by mass.

[0174] Compositions in which the content of quantum dots (Br) in the quantum dot composition is within the above-mentioned range are preferred in that they are less prone to quantum dot (D) aggregation and also exhibit good luminescence properties.

[0175] When the quantum dot composition contains perovskite fluorescent particles (Bg), the content of perovskite fluorescent particles (Bg) in the quantum dot composition, from the viewpoint of preventing the fluorescent particles from condensing and preventing concentration extinction, is preferably 50% by mass or less, more preferably 5% by mass or less, and even more preferably 1% by mass or less, in 100% by mass of the curable composition. Furthermore, from the viewpoint of obtaining good luminescence intensity, it 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-mentioned upper and lower limits can be combined arbitrarily.

[0176] When the quantum dot composition contains perovskite fluorescent particles (Bg), the content of perovskite fluorescent particles (Bg) in the quantum dot composition is typically 0.0001% to 50% by mass, preferably 0.0001% to 5% by mass, and more preferably 0.0005% to 2% by mass in 100% by mass of the quantum dot composition.

[0177] Compositions with perovskite fluorescent particles (Bg) content within the above range are preferred in that they are less prone to aggregation of perovskite fluorescent particles (Bg) and also exhibit good luminescence properties.

[0178] [solvent]

[0179] The solvent is a medium capable of dispersing quantum dots (Br), preferably a solvent that is difficult to dissolve quantum dots (Br). "Solvent" refers to a substance that is liquid at 1 atmosphere and 25°C (excluding polymeric compounds and polymers). "Dispersion" refers to the state in which quantum dots (Br), perovskite fluorescent particles (Bg), etc., float or suspend in the solvent, polymeric compounds, polymers, etc., and some may also settle.

[0180] Examples of solvents include esters such as methyl formate, ethyl formate, propyl formate, amyl formate, methyl acetate, ethyl acetate, and amyl acetate; ketones such as γ-butyrolactone, acetone, dimethyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, and methylcyclohexanone; and ethyl ether, methyl tert-butyl ether, diisopropyl ether, dimethoxymethane, dimethoxyethane, and 1,4-di(2-ethylhexyl)ethyl ether. Ethers such as alkanes, 1,3-dioxacyclopentane, 4-methyldioxacyclopentane, tetrahydrofuran, methyltetrahydrofuran, anisole, and phenethyl ether; alcohols 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, 2,2,2-trifluoroethanol, and 2,2,3,3-tetrafluoro-1-propanol; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, and ethylene glycol monoethyl ether acetic acid. Diol ethers such as esters and triethylene glycol dimethyl ether; organic solvents with amide groups such as N-methyl-2-pyrrolidone, N,N-dimethylformamide, acetamide, and N,N-dimethylacetamide; organic solvents with nitrile groups such as acetonitrile, isobutyronitrile, propionitrile, and methoxyacetonitrile; organic solvents with hydrocarbon groups such as ethylene carbonate and propylene carbonate; organic solvents with halogenated hydrocarbon groups such as dichloromethane and chloroform; organic solvents with hydrocarbon groups such as n-pentane, cyclohexane, n-hexane, benzene, toluene, and xylene; and dimethyl sulfoxide, etc.

[0181] Among them are esters such as methyl formate, ethyl formate, propyl formate, amyl formate, methyl acetate, ethyl acetate, and amyl acetate; ketones such as γ-butyrolactone, acetone, dimethyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, and methylcyclohexanone; and diethyl ether, methyl-tert-butyl ether, diisopropyl ether, dimethoxymethane, dimethoxyethane, and 1,4-diethyl-methyl-ethyl ... Organic solvents containing nitrile groups, such as alkanes, 1,3-dioxacyclopentane, 4-methyldioxacyclopentane, tetrahydrofuran, methyltetrahydrofuran, anisole, phenethyl ether, etc.; acetonitrile, isobutyronitrile, propionitrile, methoxyacetonitrile, etc.; organic solvents containing carbonate groups, such as ethylene carbonate, propylene carbonate, etc.; organic solvents containing halogenated hydrocarbon groups, such as dichloromethane, chloroform, etc.; organic solvents containing hydrocarbon groups, such as n-pentane, cyclohexane, n-hexane, benzene, toluene, xylene, etc., are considered to have low polarity and are difficult to dissolve quantum dots (Br), therefore preferred, and more preferably, organic solvents containing halogenated hydrocarbon groups, such as dichloromethane, chloroform, etc.; and organic solvents containing hydrocarbon groups, such as n-pentane, cyclohexane, n-hexane, benzene, toluene, xylene, etc.

[0182] When the quantum dot composition contains a solvent, the solvent content in the quantum dot composition can be, for example, 10 to 99.99% by mass, preferably 15 to 90% by mass, and more preferably 15 to 80% by mass.

[0183] [Melting compounds or polymers]

[0184] There is no particular limitation on the polymerizable compound; it may be one or more. Preferably, it is a polymerizable compound that exhibits good dispersibility of quantum dots (Br) at the temperature at which the quantum dot composition is manufactured.

[0185] In this specification, "polymerizable compound" refers to a compound of monomers having polymerizable groups. For example, when manufactured at room temperature and normal pressure, there are no particular limitations on what constitutes a polymerizable compound; for example, known polymerizable compounds such as styrene and methyl (meth)acrylate can be cited. Among these, either or both of (meth)acrylate and methacrylate, which are monomer components of acrylic resins, are preferred as polymerizable compounds.

[0186] In this specification, "(meth)acrylic acid" refers to at least one selected from acrylic acid and methacrylic acid. The terms "(meth)acryloyl" and "(meth)acrylate" have the same meaning.

[0187] The polymer is not particularly limited and can be one or more types. As a polymer, a polymeric compound with low solubility of quantum dots (Br) at the temperature at which the quantum dot composition is manufactured is preferred.

[0188] Examples of known polymers include polystyrene, (meth)acrylic resins, silicones, cyclic olefin polymers, and polyesters. Among these, cyclic olefin polymers, (meth)acrylic resins, and polyesters are preferred from the viewpoint of higher transparency and more efficient extraction of emitted light. Acrylic resins contain structural units derived from either or both of acrylates and methacrylates.

[0189] When acrylates and / or methacrylates and the structural units derived from them are expressed in mole percent relative to all structural units contained in a polymeric compound or polymer, the percentage can be more than 10%, more than 30%, more than 50%, more than 80%, or even 100%.

[0190] When the quantum dot composition contains a polymeric compound or polymer, the content of the polymeric compound or polymer in the quantum dot composition is, for example, 5% to 99% by mass in 100% by mass of the solid component of the quantum dot composition, preferably 10% to 99% by mass, more preferably 20% to 99% by mass, further preferably 40% to 99% by mass, and even more preferably 50% to 99% by mass.

[0191] When the content of polymeric compounds or polymers is within the above range, there is a tendency for the mechanical and optical properties of the cured quantum dot compositions to become better.

[0192] The solid component of a quantum dot composition refers to the total of all components contained in the quantum dot composition, excluding the solvent.

[0193] [Other ingredients]

[0194] Other components may include, for example, several impurities, compounds having an amorphous structure composed of elemental components constituting quantum dots (Br) and perovskite fluorescent particles (Bg), polymerization initiators, and inorganic compounds for forming a protective layer of quantum dots (Br). The proportion of these other components relative to the total mass of the quantum dot composition is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 1% by mass or less.

[0195] The color conversion layer (B) can be placed in a display device in a sealed form, such as inside a glass tube, or in a sheet form and sealed by two barrier films.

[0196] <Color Filter (C)>

[0197] The color filter (C) has a blue color filter (Cb) that transmits blue light (blue light), a green color filter (Cg) that transmits green light (green light), and a red color filter (Cr) that transmits red light (red light). White light emitted from the light conversion layer (B) is emitted from the display device as blue light, green light, and red light, respectively, after passing through the blue color filter (Cb), the green color filter (Cg), and the red color filter (Cr).

[0198] Color filters (C) typically contain a coloring agent. The coloring agent can be a dye or a pigment. As a dye, well-known dyes can be used; for example, those listed in color indexes (published by The Society of Dyers and Colourists) and dyeing guides (by dyeing companies) can be cited. Additionally, based on their chemical structure, examples include azo dyes, cyanide dyes, triphenylmethane dyes, xanthones, anthraquinone dyes, naphthoquinone dyes, quinone imine dyes, methylene dyes, azomethyl base dyes, squartzite dyes, acridine dyes, styryl dyes, coumarin dyes, quinoline dyes, nitro dyes, phthalocyanine dyes, perylene dyes, etc. These dyes can be used alone or in combination of two or more.

[0199] Specifically, examples of dyes with the following color index (CI) numbers can be cited.

[0200] CI 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;

[0201] CI Solvent Red 24, 45, 49, 90, 91111, 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;

[0202] CI Solvent Orange 2, 7, 11, 15, 26, 41, 54, 56, 77, 86, 99;

[0203] CI Solvent Violet 11, 13, 14, 26, 31, 36, 37, 38, 45, 47, 48, 51, 59, 60;

[0204] CI 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;

[0205] CI solvent green dyes 1, 3, 4, 5, 7, 28, 29, 32, 33, 34, 35, etc.

[0206] CI 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, 15 7, 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;

[0207] CI 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;

[0208] CI 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;

[0209] CI Acid Violet 6B, 7, 9, 15, 16, 17, 19, 21, 23, 24, 25, 30, 34, 38, 49, 72, 102;

[0210] CI 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, 1 26, 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;

[0211] CI 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, etc. CI acid dyes

[0212] CI 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;

[0213] CI 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;

[0214] CI direct orange 26, 34, 39, 41, 46, 50, 52, 56, 57, 61, 64, 65, 68, 70, 96, 97, 106, 107;

[0215] CI Direct Violet 47, 52, 54, 59, 60, 65, 66, 79, 80, 81, 82, 84, 89, 90, 93, 95, 96, 103, 104;

[0216] CI 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, 1 67, 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;

[0217] CI Direct Green includes CI direct dyes such as 25, 27, 31, 32, 34, 37, 63, 65, 66, 67, 68, 69, 72, 79, and 82.

[0218] CI Disperse Yellow 51, 54, 76;

[0219] CI Disperse Violet 26, 27;

[0220] CI disperse blue 1, 14, 56, 60 and other CI disperse dyes,

[0221] CI Basic Red 1, 10;

[0222] CI 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;

[0223] CI Basic Violet 2;

[0224] CI Basic Red 9;

[0225] CI Basic Green 1 and other CI basic dyes

[0226] CI Active Yellow 2, 76, 116;

[0227] CI Active Orange 16;

[0228] CI reactive dyes such as CI Reactive Red 36

[0229] CI Media Yellow 5, 8, 10, 16, 20, 26, 30, 31, 33, 42, 43, 45, 56, 61, 62, 65;

[0230] CI Media 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;

[0231] CI Media Orange 3, 4, 5, 8, 12, 13, 14, 20, 21, 23, 24, 28, 29, 32, 34, 35, 36, 37, 42, 43, 47, 48;

[0232] CI Media Purple 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;

[0233] CI Media 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;

[0234] CI mordant green dyes 1, 3, 4, 5, 10, 13, 15, 19, 21, 23, 26, 29, 31, 33, 34, 35, 41, 43, 53, etc.

[0235] CI Vapor Green 1 and other CI vapor dyes, etc.

[0236] In addition, Lumogen (a registered trademark) products of BASF can be cited, 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).

[0237] As pigments, well-known pigments can be used, for example, pigments classified as pigments in the Color Index (published by The Society of Dyers and Colourists). They can be used alone or in combination of two or more.

[0238] Specifically, examples include CI pigments 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.

[0239] CI pigments include orange 13, 31, 36, 38, 40, 42, 43, 51, 55, 59, 61, 64, 65, 71, 73, and other orange pigments;

[0240] CI pigments include 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, and other red pigments.

[0241] CI pigment blue 15, 15:1, 15:2, 15:3, 15:4, 15:6, 16, 60 and other blue pigments;

[0242] CI pigments include purple 1, 19, 23, 29, 32, 36, 38, and other purple pigments;

[0243] CI pigments include green 7, 36, 58, 59, 62, and 63, among other green pigments.

[0244] CI pigments, such as brown 23 and 25;

[0245] CI pigments include black 1, 7, 31, 32, and other black pigments.

[0246] As coloring agents, examples of chemically derived dyes include perylene yellow dye, quinoline yellow pigment, metal-containing yellow pigment, isoindoline yellow pigment, perylene orange dye, perylene orange pigment, perylene red dye, perylene red pigment, phthalocyanine pigment, copper halide phthalocyanine pigment, zinc halide phthalocyanine pigment, aluminum zinc halide phthalocyanine pigment, and diketone pyrrolopyrrole pigment.

[0247] The blue filter (Cb) may contain at least one dye and pigment among the above-mentioned colorants whose hue is classified as blue. The colorant contained in the blue filter (Cb) is preferably a blue pigment, more preferably CI Pigment Blue 15, 15:3, 15:4, 15:6, 16, 60, and even more preferably CI Pigment Blue 15:6.

[0248] The green filter (Cg) may contain at least one dye and pigment whose hue is classified as green from the above-mentioned colorants. The colorant contained in the green filter (Cg) is preferably a combination of green pigment and yellow pigment, more preferably a combination of at least one selected from CI pigments green 7, 36, 58, 59, 62, 63 and at least one selected from CI pigments 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 even more preferably a combination of CI pigment green 58 and CI pigment yellow 150.

[0249] The red color filter (Cr) may contain at least one of the above-mentioned colorants whose hue is classified as red, such as dyes and pigments. The colorant contained in the red color filter (Cr) is preferably a red pigment, more preferably a diketone pyrrolopyrrole pigment, etc.

[0250] [Manufacturing method of color filter (C)]

[0251] Color filters (C) can be manufactured, for example, by forming blue, green, and red patterns (hereinafter, sometimes referred to as colored patterns) on a substrate using blue, green, and red curable resin compositions (hereinafter, sometimes referred to as colored curable resin compositions) respectively.

[0252] Examples of methods for forming colored patterns from a color-curable resin composition include photolithography, inkjet printing, and printing, with photolithography being the preferred method. Photolithography involves coating a color-curable resin composition onto a substrate, drying it to form a color composition layer, exposing the color composition layer through a photomask, and then developing it. In photolithography, a colored coating film, which is a cured product of the aforementioned color composition layer, can be formed without using a photomask and / or without development during exposure. The colored pattern and colored coating film formed from the color-curable resin composition constitute the color filter (C) of this invention.

[0253] The film thickness of the fabricated color filter is not particularly limited and can be appropriately adjusted according to the purpose and application, for example, 0.1 to 30 μm, preferably 0.1 to 20 μm, and more preferably 0.5 to 6 μm. The film thickness of the color filter can be, for example, less than 3.5 μm.

[0254] As a substrate, glass plates such as quartz glass, borosilicate glass, aluminosilicate glass, and soda-lime glass with a surface coated with silica, resin plates such as polycarbonate, polymethyl methacrylate, and polyethylene terephthalate, silicon, and substrates on which aluminum, silver, or silver / copper / palladium alloy thin films are formed can be used. Other color filter layers, resin layers, transistors, and circuits can be formed on these substrates. The substrate can be contained within the color filter (C).

[0255] The formation of color patterns based on photolithography can be carried out using known or conventional apparatus and conditions. For example, it can be fabricated as described below.

[0256] First, the coloring curable resin composition is coated onto a substrate and then subjected to vacuum drying (pre-baking) and / or heat drying to remove volatile components such as solvents and obtain a smooth coloring curable resin composition layer.

[0257] Examples of coating methods include spin coating, slot coating, and slot spin coating.

[0258] The preferred temperature for heat drying is 30–120°C, more preferably 50–110°C. The preferred heating time is 10 seconds to 60 minutes, more preferably 30 seconds to 30 minutes. For vacuum drying, it is preferably carried out at a pressure of 50–150 Pa and a temperature range of 20–25°C. The film thickness of the color-curing resin composition layer is not particularly limited, and can be appropriately selected according to the film thickness of the target color filter.

[0259] Next, the color-curable resin composition layer is exposed through a photomask used to form the target color pattern.

[0260] The pattern on the photomask is not particularly limited; a pattern corresponding to the target application can be used. As the light source used for exposure, a light source that generates light with wavelengths of 250–450 nm is preferred. For example, light with wavelengths less than 350 nm can be cut off using a filter that cuts off that wavelength region, or light near 436 nm, 408 nm, and 365 nm can be selectively extracted using a bandpass filter that extracts these wavelength regions. Specific examples of light sources include mercury lamps, light-emitting diodes (LEDs), metal halide lamps, and halogen lamps.

[0261] In order to uniformly irradiate the entire exposure surface with parallel light and to accurately align the photomask with the substrate on which the color curable resin composition layer is formed, it is preferable to use exposure devices such as a mask aligner and a stepper.

[0262] The exposed color-curing resin composition layer is brought into contact with a developing solution for development, thereby forming a colored pattern on the substrate. The unexposed portions of the color-curing resin composition layer are dissolved and removed by the developing solution.

[0263] As a developer, an aqueous solution of an alkaline compound such as potassium hydroxide, sodium bicarbonate, sodium carbonate, and tetramethylammonium hydroxide is preferred.

[0264] 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.

[0265] The development method can be any of the following: spin-dip, immersion, or spray. Furthermore, the substrate can be tilted at any angle during development.

[0266] The substrate after development is preferably washed with water.

[0267] In addition, it is preferable to perform a post-bake on the obtained colored pattern.

[0268] The post-baking temperature is preferably 150–250°C, more preferably 160–235°C. The post-baking time is preferably 1–120 minutes, more preferably 10–60 minutes. The resulting colored pattern and colored coating, i.e., the color filter, can be further used for surface coating treatment to impart various properties.

[0269] [Coloring and Curing Resin Composition]

[0270] In addition to the colorant (hereinafter also referred to as colorant (A)) mentioned above, the coloring curable resin composition may also contain resin (B), polymerizable compound (C) and polymerization initiator (D).

[0271] The content of solid components in the color-curing resin composition relative to the total amount of the color-curing resin composition is 100% by mass or less, preferably 0.01% by mass to 100% by mass, more preferably 0.1% by mass to 99.9% by mass, further preferably 0.1% by mass to 99% by mass, particularly preferably 1% by mass to 90% by mass, even more preferably 1% by mass to 80% by mass, especially preferably 1% by mass to 70% by mass, extremely preferably 1% by mass to 60% by mass, and most preferably 1% by mass to 50% by mass. In this specification, "total amount of solid components" refers to the total amount of components obtained by removing the solvent (E) from the color-curing resin composition. The total amount of solid components and the content of each component relative to the total amount of solid components can be determined using known analytical methods such as liquid chromatography or gas chromatography.

[0272] The content of colorant (A) in the color-curing resin composition, in the total amount of solid components, can be, for example, 1% to 99% by mass, preferably 1% to 90% by mass, more preferably 1% to 80% by mass, further preferably 1% to 70% by mass, particularly preferably 1% to 60% by mass, even more preferably 1% to 55% by mass, especially preferably 5% to 55% by mass, and extremely preferably 10% to 55% by mass. In a preferred embodiment of the invention, the content of colorant (A) in the color-curing resin composition, in the total amount of solid components, can be, for example, 12% to 80% by mass, preferably 15% to 70% by mass, more preferably 20% to 50% by mass.

[0273] [Resin(B)]

[0274] Resin (B) is preferably an alkali-soluble resin, more preferably a polymer having structural units derived from at least one monomer (hereinafter sometimes referred to as "monomer (a)") selected from unsaturated carboxylic acids and unsaturated carboxylic anhydrides.

[0275] Resin (B) is preferably a copolymer having structural units derived from monomers (hereinafter sometimes referred to as "monomer (b)") having a cyclic ether structure having 2 to 4 carbon atoms and an olefinic unsaturated bond, as well as other structural units.

[0276] Other structural units include structural units derived from monomers that can copolymerize with monomer (a) (wherein, they are different from monomer (a) and monomer (b). Hereinafter, they are sometimes referred to as "monomer (c)"), structural units having olefinic unsaturated bonds, etc.

[0277] Examples of monomers (a) include, for example, unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, ortho-, meta-, and p-vinylbenzoic acid;

[0278] Maleic acid, fumaric acid, citraconic acid, zeaxanthin, itaconic acid, 3-vinyl phthalic acid, 4-vinyl phthalic acid, 3,4,5,6-tetrahydrophthalic acid, 1,2,3,6-tetrahydrophthalic acid, dimethyltetrahydrophthalic acid, 1,4-cyclohexene dicarboxylic acid, and other unsaturated dicarboxylic acids;

[0279] 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, 5-carboxy-6-ethylbicyclo[2.2.1]hept-2-ene, and other bicyclic unsaturated compounds containing carboxyl groups;

[0280] Maleic anhydride, citraconic anhydride, itaconic anhydride, 3-vinyl phthalic anhydride, 4-vinyl phthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, 5,6-dicarboxylic acid bicyclic [2.2.1]hept-2-ene anhydride and other unsaturated dicarboxylic acid anhydrides;

[0281] Unsaturated mono[(meth)acryloyloxyethyl] esters of polycarboxylic acids with two or more members, such as mono[2-(meth)acryloyloxyethyl] ester of succinate and mono[2-(meth)acryloyloxyethyl] ester of phthalate.

[0282] Unsaturated acrylates, such as α-(hydroxymethyl) acrylate, contain both hydroxyl and carboxyl groups in the same molecule.

[0283] Among these, considering the copolymerization reactivity and the solubility of the resulting resin in alkaline aqueous solution, acrylic acid, methacrylic acid, and maleic anhydride are preferred.

[0284] Monomer (b) refers to a polymeric compound having a cyclic ether structure (e.g., selected from at least one of oxecyclopropane, oxecyclobutane and tetrahydrofuran rings) with 2 to 4 carbon atoms and an olefinic unsaturated bond.

[0285] Monomer (b) is preferably a monomer having a cyclic ether structure with 2 to 4 carbon atoms and a (meth)acryloyloxy group.

[0286] Examples of monomers (b) include, for example, monomers having oxetyl and olefinic unsaturated bonds (hereinafter sometimes referred to as "monomer (b1)"), monomers having oxetyl and olefinic unsaturated bonds (hereinafter sometimes referred to as "monomer (b2)"), and monomers having tetrahydrofuranyl and olefinic unsaturated bonds (hereinafter sometimes referred to as "monomer (b3)"), etc.

[0287] As monomers (b1), examples include monomers having a structure in which aliphatic unsaturated hydrocarbons of straight or branched form are epoxidized (hereinafter, sometimes referred to as "monomers (b1-1)") and monomers having a structure in which alicyclic unsaturated hydrocarbons are epoxidized (hereinafter, sometimes referred to as "monomers (b1-2)").

[0288] As monomer (b1-1), monomers having glycidyl groups and olefinic unsaturated bonds are preferred.

[0289] Examples of monomers (b1-1) include, for instance, 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, and 2,3-bis(glycidyl)... Glyceryl oxymethyl styrene, 2,4-bis(glyceryl oxymethyl)styrene, 2,5-bis(glyceryl oxymethyl)styrene, 2,6-bis(glyceryl oxymethyl)styrene, 2,3,4-tris(glyceryl oxymethyl)styrene, 2,3,5-tris(glyceryl oxymethyl)styrene, 2,3,6-tris(glyceryl oxymethyl)styrene, 3,4,5-tris(glyceryl oxymethyl)styrene, and 2,4,6-tris(glyceryl oxymethyl)styrene, etc.

[0290] Examples of monomers (b1-2) include, for example, vinylcyclohexene monooxide, 1,2-epoxy-4-vinylcyclohexane (e.g., Celloxide 2000; manufactured by Daicel Co., Ltd.), 3,4-epoxycyclohexylmethyl methacrylate (e.g., Cyclomer A400; manufactured by Daicel Co., Ltd.), 3,4-epoxycyclohexylmethyl methacrylate (e.g., Cyclomer M100; manufactured by Daicel Co., Ltd.), compounds represented by formula (BI), and compounds represented by formula (BII).

[0291]

[0292] In equations (BI) and (BII), R a and R b Each of the above can independently represent an alkyl group having 1 to 4 hydrogen atoms or carbon atoms, wherein the hydrogen atoms contained in the alkyl group may be replaced by hydroxyl groups.

[0293] X a and X bEach represents a single bond independently, *-R c -、*-R c -O-、*-R c -S- or *-R c -NH-.

[0294] R c It represents alkyl diols with 1 to 6 carbon atoms.

[0295] * indicates a binding site with O.

[0296] Examples of alkyl groups having 1 to 4 carbon atoms include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, and tert-butyl.

[0297] Examples of alkyl groups in which hydrogen atoms are replaced by hydroxyl groups include hydroxymethyl, 1-hydroxyethyl, 2-hydroxyethyl, 1-hydroxypropyl, 2-hydroxypropyl, 3-hydroxypropyl, 1-hydroxy-1-methylethyl, 2-hydroxy-1-methylethyl, 1-hydroxybutyl, 2-hydroxybutyl, 3-hydroxybutyl, 4-hydroxybutyl, etc.

[0298] As R a and R b Examples of preferred elements include hydrogen atoms, methyl groups, hydroxymethyl groups, 1-hydroxyethyl groups, and 2-hydroxyethyl groups; examples of more preferred elements include hydrogen atoms and methyl groups.

[0299] Examples of alkyl diyl groups include methylene, ethylene, propane-1,2-diyl, propane-1,3-diyl, butane-1,4-diyl, pentane-1,5-diyl, hexane-1,6-diyl, etc.

[0300] As X a and X b Examples of preferred components include single bonds, methylene, ethylene, *-CH2-O- and *-CH2CH2-O-, and examples of more preferred components include single bonds and *-CH2CH2-O- (* indicates the bonding site with O).

[0301] Examples of compounds represented by formula (BI) include compounds represented by any of formulas (BI-1) to (BI-15). Among these, compounds represented by formulas (BI-1), (BI-3), (BI-5), (BI-7), (BI-9), and (BI-11) to (BI-15) are preferred, and compounds represented by formulas (BI-1), (BI-7), (BI-9), and (BI-15) are more preferred.

[0302]

[0303] Examples of compounds represented by formula (BII) include compounds represented by any one of formulas (BII-1) to (BII-15), among which compounds represented by formulas (BII-1), (BII-3), (BII-5), (BII-7), (BII-9), and (BII-11) to (BII-15) are preferred, and compounds represented by formulas (BII-1), (BII-7), (BII-9), and (BII-15) are more preferred.

[0304]

[0305] The compounds represented by formula (BI) and formula (BII) can be used individually or in combination of two or more. They can also be used together. When using compounds represented by formula (BI) and formula (BII), their content ratio [compound represented by formula (BI): compound represented by formula (BII)] is preferably 5:95 to 95:5 on a molar basis, more preferably 10:90 to 90:10, and even more preferably 20:80 to 80:20.

[0306] As a monomer (b2), it is more preferably a monomer having an oxetyl group and a (meth)acryloyl group.

[0307] Examples of monomers (b2) include 3-methyl-3-methacryloxymethyloxetane, 3-methyl-3-methacryloxymethyloxetane, 3-ethyl-3-methacryloxymethyloxetane, 3-ethyl-3-methacryloxymethyloxetane, 3-methyl-3-methacryloxyethyloxetane, 3-methyl-3-methacryloxyethyloxetane, 3-ethyl-3-methacryloxyethyloxetane, 3-ethyl-3-methacryloxyethyloxetane, etc.

[0308] As monomer (b3), a monomer having a tetrahydrofuran group and a (meth)acryloyloxy group is more preferred. Examples of monomer (b3) include, for example, tetrahydrofurfuryl acrylate (e.g., Viscoat V#150, manufactured by Osaka Organic Chemicals Co., Ltd.) and tetrahydrofurfuryl methacrylate.

[0309] As monomer (b), monomer (b1) is preferred in terms of improving the reliability of the obtained color filter in terms of heat resistance, reagent resistance, etc. Furthermore, monomers (b1-2) are more preferred in terms of excellent storage stability of the color-curing resin composition.

[0310] Examples of monomers (c) include, for instance, 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, and tricyclo(meth)acrylate [5.2.1.0]. 2 ，6 ] Decane-8-yl ester, (meth)acrylate tricyclic [5.2.1.0] 2，6 ] Decane-9-yl ester, (meth)acrylate tricyclic [5.2.1.0] 2，6 ] Decen-8-yl ester, (meth)acrylate tricyclic [5.2.1.0] 2，6 Decen-9-yl ester, dicyclopentoxyethyl ester (meth)acrylate, isobornyl ester (meth)acrylate, adamantyl ester (meth)acrylate, allyl ester (meth)acrylate, propargyl ester (meth)acrylate, phenyl ester (meth)acrylate, naphthyl ester (meth)acrylate, and benzyl ester (meth)acrylate, etc. (meth)acrylates;

[0311] Hydroxyl acrylates such as 2-hydroxyethyl methacrylate and 2-hydroxypropyl methacrylate;

[0312] Dicarboxylic acid diesters such as diethyl maleate, diethyl fumarate, and diethyl itaconic acid;

[0313] 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-methoxybicyclo[2.2.1]hept-2-ene, 5-ethoxybicyclo[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-dimethyl Bicyclic unsaturated compounds such as oxybicyclo[2.2.1]hept-2-ene, 5,6-diethoxybicyclo[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;

[0314] Dicarbonyl imide derivatives such as N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, N-succinimide-3-maleimide benzoate, N-succinimide-4-maleimide butyrate, N-succinimide-6-maleimide hexanoate, N-succinimide-3-maleimide propionate, and N-(9-acridyl)maleimide;

[0315] Aromatic compounds containing vinyl groups, such as styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, vinyltoluene, and p-methoxystyrene; nitrile compounds containing vinyl groups, such as (meth)acrylonitrile; halogenated hydrocarbons such as vinyl chloride and vinylidene chloride; amides containing vinyl groups, such as (meth)acrylamide; esters such as vinyl acetate; dienes such as 1,3-butadiene, isoprene, and 2,3-dimethyl-1,3-butadiene.

[0316] Among these, considering copolymerization reactivity and heat resistance, styrene, vinyltoluene, and tricyclic (meth)acrylate [5.2.1.0] are preferred. 2，6 ] Decane-8-yl ester, (meth)acrylate tricyclic [5.2.1.0] 2，6 ] Decane-9-yl ester, (meth)acrylate tricyclic [5.2.1.0] 2，6] Decen-8-yl ester, (meth)acrylate tricyclic [5.2.1.0] 2，6 [2.2.1] Dexene-9-yl ester, 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, etc.

[0317] As resin (B), examples specifically include 3,4-epoxycyclohexyl methyl methacrylate / (meth)acrylic acid copolymer and 3,4-epoxytricyclic (meth)acrylic acid [5.2.1.0]. 2，6 Decyl ester / (meth)acrylic acid copolymer, glycidyl methacrylate / benzyl methacrylate / (meth)acrylic acid copolymer, glycidyl methacrylate / styrene / (meth)acrylic acid copolymer, 3,4-epoxy tricyclic (meth)acrylic acid [5.2.1.0] 2，6 Decyl ester / (meth)acrylic acid / N-cyclohexylmaleimide copolymer, (meth)acrylic acid 3,4-epoxy tricyclic [5.2.1.0] 2，6 Decyl ester / (meth)acrylic acid / N-cyclohexylmaleimide / (meth)acrylic acid 2-hydroxyethyl ester copolymer, (meth)acrylic acid 3,4-epoxy tricyclic [5.2.1.0] 2，6 Decyl ester / (meth)acrylic acid / vinyl toluene copolymer, (meth)acrylic acid 3,4-epoxy tricyclic [5.2.1.0] 2，6 Decyl ester / (meth)acrylic acid / (meth)acrylic acid 2-ethylhexyl ester copolymer, (meth)acrylic acid 3,4-epoxy tricyclic [5.2.1.0] 2，6 Decyl ester / (meth)acrylate tricyclo[5.2.1.0] 2，6 Resins as described in Japanese Patent Application Publication Nos. 9-106071, 2004-29518 and 2004-361455, etc.

[0318] Among them, the resin (B) is preferably a copolymer comprising structural units from monomer (a) and structural units from monomer (b).

[0319] Resin (B) may be composed of two or more types. In this case, resin (B) preferably comprises at least one copolymer containing structural units from monomer (a) and structural units from monomer (b), more preferably comprising at least one copolymer containing structural units from monomer (a) and structural units from monomer (b1), further preferably comprising at least one copolymer containing structural units from monomer (a) and structural units from monomer (b1-2), and particularly preferably comprising a copolymer selected from (meth)acrylic acid 3,4-epoxytricyclo[5.2.1.0]. 2，6 Decyl ester / (meth)acrylic acid copolymer, (meth)acrylic acid 3,4-epoxy tricyclic [5.2.1.0] 2，6 Decyl ester / (meth)acrylic acid / N-cyclohexylmaleimide / (meth)acrylic acid 2-hydroxyethyl ester copolymer, (meth)acrylic acid 3,4-epoxy tricyclic [5.2.1.0] 2，6 Decyl ester / (meth)acrylic acid / vinyl toluene copolymer, (meth)acrylic acid 3,4-epoxy tricyclic [5.2.1.0] 2，6 One or more of the following: decyl ester / (meth)acrylic acid / (meth)acrylic acid 2-ethylhexyl ester copolymer.

[0320] The polystyrene-converted weight-average molecular weight (Mw) of resin (B) is preferably 1,000 to 100,000, more preferably 1,000 to 50,000, even more preferably 1,000 to 30,000, particularly preferably 3,000 to 30,000, and especially preferably 5,000 to 30,000.

[0321] The dispersion of resin (B) [weight average molecular weight (Mw) / number average molecular weight (Mn)] is preferably 1 to 6, more preferably 1 to 5, and even more preferably 1 to 4.

[0322] The acid value (converted to solids content) of resin (B) is preferably 10–500 mg-KOH / g, more preferably 20–450 mg-KOH / g, even more preferably 20–400 mg-KOH / g, even more preferably 20–370 mg-KOH / g, even more preferably 30–370 mg-KOH / g, particularly preferably 30–350 mg-KOH / g, especially preferably 30–340 mg-KOH / g, and most preferably 30–335 mg-KOH / g. Here, the acid value is a value determined as the amount (mg) of potassium hydroxide required to neutralize 1 g of resin (B), and can be obtained, for example, by titration using an aqueous solution of potassium hydroxide.

[0323] In the color-curing resin composition, the content of resin (B) is less than 100% by mass relative to the total amount of solid components. In a preferred embodiment of the invention, the content of resin (B) in the color-curing resin composition is, for example, 1% to 30% by mass of the total amount of solid components, preferably 2% to 25% by mass, and more preferably 4% to 20% by mass.

[0324] [Polymerizing compound (C)]

[0325] The polymerizable compound (C) is a compound that can be polymerized by active free radicals and / or acids generated by the polymerization initiator (D), such as a compound with polymerizable olefinic unsaturated bonds, preferably a (meth)acrylate compound.

[0326] Examples of polymeric compounds having one olefinic unsaturated bond include, for example, nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, 2-hydroxyethyl acrylate, N-vinylpyrrolidone, and the monomers (a), (b), and (c) described above.

[0327] Examples of polymeric compounds having two olefinic 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-methylpentyl glycol di(meth)acrylate.

[0328] The polymerizable compound (C) is preferably a polymerizable compound having three or more olefinic unsaturated bonds. Examples of such polymerizable compounds include, for instance, 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, and tri(2-(meth)acryloyl) Oxyethyl 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, etc., with dipentaerythritol penta(meth)acrylate and dipentaerythritol hexa(meth)acrylate being preferred examples.

[0329] The weight-average molecular weight of the polymeric compound (C) is preferably 50 to 4000, more preferably 50 to 3500, even more preferably 50 to 3000, particularly preferably 150 to 2900, and especially preferably 250 to 1500.

[0330] The content of the polymeric compound (C) in the coloring and curing resin composition is less than 100% by mass relative to the total solid content. In a preferred embodiment of the invention, the content of the polymeric compound (C) in the coloring and curing resin composition, relative to the total solid content, can be, for example, 1% to 50% by mass, preferably 5% to 45% by mass, more preferably 10% to 40% by mass, and particularly preferably 15% to 40% by mass.

[0331] [Polymerization Initiator (D)]

[0332] There are no particular limitations on polymerization initiators (D) as long as they are compounds that can generate active free radicals, acids, etc. under the action of light and heat and initiate polymerization. Well-known polymerization initiators can be used.

[0333] Examples of polymerization initiators (D) include oxime compounds, such as O-acyloxime compounds, alkyl phenyl ketone compounds, biimidazole compounds, triazine compounds, and acylphosphine oxide compounds.

[0334] Examples of O-acyl oxime compounds include, for instance, N-benzoyloxy-1-(4-phenylthiophenyl)butane-1-one-2-imine, N-benzoyloxy-1-(4-phenylthiophenyl)octane-1-one-2-imine, N-benzoyloxy-1-(4-phenylthiophenyl)-3-cyclopentylpropane-1-one-2-imine, N-acetoxy-1-(4-phenylthiophenyl)-3-cyclopentylpropane-1-one-2-imine, N-acetoxy-1-(4-phenylthiophenyl)-3-cyclohexylpropane-1-one-2-imine, and N-acetoxy-1-[9-ethyl-6-( Examples of imines include 2-methylbenzoyl)-9H-carbazole-3-yl]ethane-1-imine, N-acetoxy-1-[9-ethyl-6-{2-methyl-4-(3,3-dimethyl-2,4-dioxacyclopentylmethyloxy)benzoyl}-9H-carbazole-3-yl]ethane-1-imine, N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazole-3-yl]-3-cyclopentylpropane-1-imine, and N-benzoyloxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazole-3-yl]-3-cyclopentylpropane-1-one-2-imine. In addition, commercially available products such as Irgacure OXE01, OXE02 (all manufactured by BASF) and N-1919 (manufactured by ADEKA Co., Ltd.) can be used as O-acyl oxime compounds. Among them, the O-acyl oxime compound is preferably selected from at least one of N-benzoyloxy-1-(4-phenylthiophenyl)butane-1-one-2-imine, N-benzoyloxy-1-(4-phenylthiophenyl)octane-1-one-2-imine and N-benzoyloxy-1-(4-phenylthiophenyl)-3-cyclopentylpropane-1-one-2-imine, more preferably N-benzoyloxy-1-(4-phenylthiophenyl)octane-1-one-2-imine.

[0335] Examples of alkyl phenyl ketone compounds include 2-methyl-2-morpholino-1-(4-methylthiophenyl)propane-1-one, 2-dimethylamino-1-(4-morpholinophenyl)-2-benzylbutane-1-one, and 2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4-morpholino)phenyl]butane-1-one. Commercially available alkyl phenyl ketone compounds include Irgacure 369, 907, and 379 (all manufactured by BASF).

[0336] Examples of alkyl phenyl ketone compounds include oligomers of 2-hydroxy-2-methyl-1-phenylpropane-1-one, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]propane-1-one, 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-(4-isopropenylphenyl)propane-1-one, α,α-diethoxyacetophenone, and benzoyladium dimethyl ketal.

[0337] Examples of biimidazole compounds include, for example, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2,3-dichlorophenyl)-4,4',5,5'-tetraphenylbiimidazole (e.g., see Japanese Patent Application Publication Nos. 6-75372, 6-75373, etc.), 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(alkoxyphenyl)biimidazole, 2,2'-bis( Biimidazole compounds with the phenyl group at the 4,4', 5,5'-position substituted with a carbonyl alkoxy group (e.g., see Japanese Patent Publication No. 48-38403, Japanese Patent Application Publication No. 62-174204, etc.) and biimidazole compounds with the phenyl group at the 4,4', 5,5'-position substituted with a carbonyl alkoxy group (e.g., see Japanese Patent Application Publication No. 7-10913, etc.).

[0338] Examples of triazine compounds 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-piperyl-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxystyryl)-1,3,5-triazine, and 2,4-bis(trichloromethyl)-6-[2- [5-Methylfuran-2-yl)vinyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(furan-2-yl)vinyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino-2-methylphenyl)vinyl]-1,3,5-triazine and 2,4-bis(trichloromethyl)-6-[2-(3,4-dimethoxyphenyl)vinyl]-1,3,5-triazine, etc.

[0339] Examples of acylphosphine oxide compounds include 2,4,6-trimethylbenzoyl diphenylphosphine oxide. Commercially available products such as Irgacure (registered trademark) 819 (manufactured by BASF Corporation) can be used.

[0340] In addition, examples of polymerization initiators (D) include benzoin compounds such as benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether; benzophenone compounds such as methyl benzoyl peroxybenzoate, 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-phenanthroquinone, 2-ethylanthraquinone, and camphorquinone; and 10-butyl-2-chloroacridone, benzoyl, methyl benzoylformate, and titanium dioxide compounds.

[0341] These are preferred in combination with polymerization initiators (hereinafter, sometimes referred to as polymerization initiators (D1)) described later, particularly amines.

[0342] The polymerization initiator (D) is preferably a polymerization initiator containing at least one selected from alkyl phenyl ketone compounds, triazine compounds, acylphosphine oxide compounds, oxime compounds and bimidazole compounds, more preferably a polymerization initiator containing an oxime compound, and even more preferably a polymerization initiator containing an O-acyl oxime compound.

[0343] In a preferred embodiment of the invention, the content of polymerization initiator (D) in the coloring curable resin composition is, for example, 1% to 20% by mass of the total solids, preferably 2% to 15% by mass, and more preferably 5% to 12% by mass.

[0344] [Polymerization Initiator (D1)]

[0345] Colored curable resin compositions may contain a polymerization initiator (D1). A polymerization initiator (D1) is a compound or sensitizer used to promote the polymerization of a polymerizable compound (C) initiated by a polymerization initiator (D). When containing a polymerization initiator (D1), it is usually used in combination with the polymerization initiator (D).

[0346] Examples of polymerization initiators (D1) include amine compounds, alkoxyanthracene compounds, thioxanthone compounds, and carboxylic acid compounds.

[0347] Examples of amine compounds include triethanolamine, methyldiethanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 2-dimethylaminoethyl benzoate, 2-ethylhexyl 4-dimethylaminobenzoate, N,N-dimethyl-p-toluidine, 4,4'-bis(dimethylamino)benzophenone (commonly known as Mischel ketone), 4,4'-bis(diethylamino)benzophenone, and 4,4'-bis(ethylmethylamino)benzophenone, with 4,4'-bis(diethylamino)benzophenone being a preferred example. Additionally, commercially available products such as EAB-F (manufactured by Hodogaya Chemical Industry Co., Ltd.) can be used as amine compounds.

[0348] Examples of alkoxyanthracene compounds include 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, 2-ethyl-9,10-diethoxyanthracene, 9,10-dibutoxyanthracene, and 2-ethyl-9,10-dibutoxyanthracene.

[0349] Examples of thioxanthone compounds include 2-isopropylthioxanthone, 4-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, and 1-chloro-4-propoxythioxanthone.

[0350] Examples of carboxylic acid compounds include phenylthioacetic acid, methylphenylthioacetic acid, ethylphenylthioacetic acid, methylethylphenylthioacetic acid, dimethylphenylthioacetic acid, methoxyphenylthioacetic acid, dimethoxyphenylthioacetic acid, chlorophenylthioacetic acid, dichlorophenylthioacetic acid, N-phenylglycine, phenoxyacetic acid, naphthioacetic acid, N-naphthylglycine, and naphthoxyacetic acid.

[0351] When using these polymerization initiators (D1), their content relative to the total amount of resin (B) and polymerizable compound (C) is preferably 0.1% to 30% by mass, more preferably 1% to 20% by mass.

[0352] [Solvent (E)]

[0353] Coloring and curing resin compositions may contain a solvent (E). The solvent (E) is not particularly limited and solvents commonly used in this field may be used.

[0354] Examples of solvents (E) include ester solvents (solvents containing -CO-O- but not -O-), ether solvents (solvents containing -O- but not -CO-O-), ether ester solvents (solvents containing both -CO-O- and -O-), ketone solvents (solvents containing -CO- but not -CO-O-), alcohol solvents (solvents containing OH but not -O-, -CO-, and -CO-O-), aromatic hydrocarbon solvents, amide solvents, and dimethyl sulfoxide.

[0355] Examples of ester solvents include methyl lactate, ethyl lactate, butyl lactate, methyl 2-hydroxyisobutyrate, ethyl acetate, n-butyl acetate, isobutyl acetate, amyl formate, isoamyl acetate, butyl propionate, isopropyl butyrate, ethyl butyrate, butyl butyrate, methyl pyruvate, ethyl pyruvate, propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, cyclohexanol acetate, and γ-butyrolactone.

[0356] Examples of ether solvents 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, and 1,4-di(ethylene glycol monoethyl ether). Alkane, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether, anisole, phenethyl ether, and methyl anisole, etc.

[0357] 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, ethyl 2-ethoxy-2-methylpropionate, 3-methoxybutylacetate, 3-methyl-3-methoxybutylacetate, 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.

[0358] 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.

[0359] Examples of alcohol solvents include methanol, ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, propylene glycol, and glycerol.

[0360] Examples of aromatic hydrocarbon solvents include benzene, toluene, xylene, and mesitylene.

[0361] Examples of amide solvents include N,N-dimethylformamide, N,N-dimethylacetamide, and N-methylpyrrolidone.

[0362] These solvents can be used in combination with more than one.

[0363] Among the solvents mentioned above, organic solvents with a boiling point of 120°C to 180°C at 1 atm are preferred, considering their coatability and drying properties. Examples of 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 solvents include propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, ethyl lactate, ethyl 3-ethoxypropionate, and 4-hydroxy-4-methyl-2-pentanone.

[0364] The solvent (E) content is less than 100% by mass relative to the total amount of the coloring and curing resin composition, preferably 70% to 95% by mass, more preferably 75% to 92% by mass. In other words, the total amount of solid components in the coloring composition is preferably 5% to 30% by mass, more preferably 8% to 25% by mass. In a preferred embodiment of the invention, the solvent (E) content in the coloring and curing resin composition, relative to the total amount of the coloring and curing resin composition, can be, for example, 70% to 95% by mass, preferably 80% to 90% by mass.

[0365] [Preparation of a solution containing colorant (A)]

[0366] When a coloring-curing resin composition contains a solvent (E), a solution containing colorant (A) and solvent (E) can be prepared in advance, and the coloring-curing resin composition can be prepared using the solution containing colorant (A). If colorant (A) is not soluble in solvent (E), a solution containing colorant (A) can be prepared by dispersing and mixing colorant (A) in solvent (E). The solution containing colorant (A) may contain part or all of the solvent (E) contained in the coloring-curing resin composition.

[0367] The content of solid components in the solution containing colorant (A) is less than 100% by mass relative to the total amount of the solution containing colorant (A), preferably 0.01% by mass to 99.99% by mass, more preferably 0.1% by mass to 99.9% by mass, even more preferably 0.1% by mass to 99% by mass, particularly preferably 1% by mass to 90% by mass, even more preferably 1% by mass to 80% by mass, especially preferably 1% by mass to 70% by mass, extremely preferably 1% by mass to 60% by mass, and most preferably 1% by mass to 50% by mass.

[0368] The content of colorant (A) in the solution containing colorant (A) is less than 100% by mass of the total solid components in the solution containing colorant (A), preferably 1% to 99% by mass, more preferably 1% to 95% by mass, even more preferably 1% to 90% by mass, particularly preferably 3% to 80% by mass, and even more preferably 5% to 70% by mass. In a preferred embodiment of the invention, the content of colorant (A) in the solution containing colorant (A) is, for example, 40% to 80% by mass of the total solid components, preferably 50% to 70% by mass.

[0369] The colorant (A) can be subjected to various treatments as needed, such as rosin treatment, surface treatment using colorant (A) derivatives with introduced acidic or basic groups, grafting treatment of the colorant (A) surface using polymeric compounds, micronization treatment based on sulfuric acid micronization, cleaning treatment based on organic solvents or water to remove impurities, and removal treatment of ionic impurities based on ion exchange. The particle size of the colorant (A) is preferably approximately uniform.

[0370] Colorant (A) can be dispersed in a solution containing a dispersant to achieve a uniform dispersion of colorant (A). Colorant (A) can be dispersed individually or in combination.

[0371] Dispersants can be surfactants, which can be cationic, anionic, nonionic, or amphoteric. Specifically, examples include polyester-based, polyamine-based, and acrylic surfactants. These dispersants can be used alone or in combination of two or more. Examples of dispersants by trade name include KP (manufactured by Shin-Etsu Chemical Co., Ltd.), FLOWLEN (manufactured by Kyoeisha Chemical Co., Ltd.), Solsperse (registered trademark) (manufactured by Zeneca Co., Ltd.), EFKA (registered trademark) (manufactured by BASF Co., Ltd.), AJISPER (registered trademark) (manufactured by Ajinomoto Fine Chemicals Co., Ltd.), Disperbyk (registered trademark) (manufactured by BYK-Chemie Co., Ltd.), and BYK (registered trademark) (manufactured by BYK-Chemie Co., Ltd.).

[0372] When the solution containing colorant (A) also contains a dispersant, the amount of the dispersant (solid component) used relative to 100 parts by mass of colorant (A) is, for example, 0.01 parts by mass to 10,000 parts by mass, preferably 0.01 parts by mass to 5,000 parts by mass, more preferably 0.01 parts by mass to 1,000 parts by mass, further preferably 0.1 parts by mass to 500 parts by mass, particularly preferably 0.1 parts by mass to 300 parts by mass, even more preferably 1 part by mass to 300 parts by mass, and especially preferably 5 parts by mass to 260 parts by mass. When the amount of dispersant used is within the above range, there is a tendency to obtain a more uniformly dispersed solution containing colorant (A).

[0373] When the solution containing colorant (A) contains pigment, the content of dispersant relative to the total amount of pigment (100 parts by mass) is preferably 1 to 100 parts by mass, more preferably 10 to 70 parts by mass, and even more preferably 20 to 60 parts by mass.

[0374] When preparing a coloring curable resin composition using a solution containing colorant (A) and solvent (E) prepared in advance, the solution containing colorant (A) may pre-contain a portion or all, preferably a portion, of the resin (B) contained in the coloring curable resin composition. By pre-containing resin (B), the dispersion stability of the solution containing colorant (A) can be further improved.

[0375] When the solution containing colorant (A) contains resin (B), the content of resin (B) relative to 100 parts by mass of colorant (A) is, for example, 0.01 parts by mass to 10,000 parts by mass, preferably 0.01 parts by mass to 5,000 parts by mass, more preferably 0.01 parts by mass to 1,000 parts by mass, even more preferably 0.1 parts by mass to 500 parts by mass, and especially preferably 0.1 parts by mass to 300 parts by mass.

[0376] In a preferred embodiment of the present invention, when the solution containing colorant (A) contains resin (B), the content of resin (B) in the solution containing colorant (A) is, for example, 10 to 50 parts by mass, preferably 20 to 40 parts by mass, relative to 100 parts by mass of colorant (A).

[0377] The coloring and curing resin composition may further include a leveling agent (F) and an antioxidant (G).

[0378] [Leveling agent (F)]

[0379] Coloring and curing resin compositions may contain leveling agents (F). Examples of leveling agents (F) include silicone surfactants, fluorinated surfactants, and silicone surfactants having fluorine atoms. They may have polymerizable groups on their side chains.

[0380] Examples of organosilicon surfactants include surfactants with intramolecular siloxane bonds. Specifically, examples include Toray Silicone DC3PA, Toray Silicone SH7PA, Toray Silicone DC11PA, Toray Silicone SH21PA, Toray Silicone SH28PA, Toray Silicone SH29PA, Toray Silicone SH30PA, Toray Silicone SH8400 (trade name: Dow Coming Toray Co., Ltd.), KP321, KP322, KP323, KP324, KP326, KP340, KP341 (Shin-Etsu Chemical Industry Co., Ltd.), TSF400, TSF401, TSF410, TSF4300, TSF4440, TSF4445, TSF4446, TSF4452, and TSF4460 (MOMENTIVE PERFORMANCEMATERIALS JAPAN Co., Ltd.).

[0381] As fluorinated surfactants, examples include surfactants with intramolecular fluorocarbon chains. Specifically, examples include FLUORAD (registered trademark) FC430, FLUORAD FC431 (manufactured by Sumitomo 3M Co., Ltd.), MEGAFAC (registered trademark) F142D, MEGAFAC F171, MEGAFAC F172, MEGAFAC F173, MEGAFAC F177, MEGAFAC F183, MEGAFACF554, MEGAFAC R30, MEGAFAC RS-718-K (manufactured by DIC Co., Ltd.), F-top (registered trademark) EF301, F-top EF303, F-top EF351, F-top EF352 (manufactured by Mitsubishi Materials Electronics Chemicals Co., Ltd.), Surflon (registered trademark) S381, Surflon S382, Surflon SC101, and Surflon... SC105 (manufactured by Asahi Glass Co., Ltd.) and E5844 (manufactured by Daikin Fine Chemicals Research Institute Co., Ltd.), etc.

[0382] Organosilicon surfactants containing fluorine atoms include surfactants with siloxane bonds and fluorocarbon chains within their molecules. Specifically, examples include MEGAFAC (registered trademark) R08, MEGAFAC BL20, MEGAFAC F475, MEGAFAC F477, and MEGAFAC F443 (manufactured by DIC Corporation).

[0383] When leveling agent (F) is present, its content relative to the total amount of the color-curing resin composition is typically 0.0001% to 5% by mass, preferably 0.0001% to 3% by mass, more preferably 0.0001% to 2% by mass, and even more preferably 0.0001% to 1% by mass. In a preferred embodiment of the invention, the content of leveling agent (F) relative to the total amount of the color-curing resin composition can, for example, be 0.001% to 1% by mass, preferably 0.005% to 0.05% by mass. When the content of leveling agent (F) is within the above range, the flatness of the color filter can be improved.

[0384] [Antioxidant (G)]

[0385] The coloring and curing 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 two or more antioxidants, alone or in combination. As an antioxidant, there are no particular limitations as long as it is an industrially commonly used antioxidant, such as phenolic antioxidants, phosphorus antioxidants, and sulfur antioxidants.

[0386] Examples of phenolic antioxidants include, for instance, 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”-(trimethylbenzene-2,4,6-triyl)tri-p-cresol, manufactured by BASF), and Irganox 3114 (Irganox 1010: pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], manufactured by BASF). 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-dimethyl)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 (Irganox 1135: phenylpropane acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy, C7-C9 side-chain 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-butylaniline)-1,3,5-triazine, manufactured by BASF), ADK STAB AO-80 (ADK STAB AO-80: 3,9-bis(2-(3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy)-1,1-dimethylethyl)-2,4,8,10-tetraoxellaspiro(5,5)deca-ane, manufactured by ADEKA Co., Ltd., Sumilizer BHT (manufactured by Sumitomo Chemical Co., Ltd.), Sumilizer GA-80 (manufactured by Sumitomo Chemical Co., Ltd.), Sumilizer GS (manufactured by Sumitomo Chemical Co., Ltd.), Cyanox 1790 (manufactured by Sitech Co., Ltd.), and Vitamin E (manufactured by Eisai Co., Ltd.), etc.

[0387] Examples of phosphorus-based antioxidants mentioned above 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]dioxane-6-yl]oxy]ethyl]amine, manufactured by BASF), Irgafos 38 (Irgafos 38: bis(2,4-bis(1,1-dimethylethyl)-6-methylphenyl)ethyl phosphite, manufactured by BASF), ADK STAB 329K (manufactured by ADEKA Corporation), ADK STAB PEP36 (manufactured by ADEKA Corporation), ADK STAB PEP-8 (manufactured by ADEKA Corporation), Sandstab P-EPQ (manufactured by Clariant), and Weston... 618 (Weston 618, manufactured by GE), Weston 619G (Weston 619G, manufactured by GE), Ultranox 626 (Ultranox 626, manufactured by GE), and Sumilizer GP (Sumilizer GP: 6-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetratert-butyldibenzo[d,f][1.3.2]dioxaphosphaheptan) (manufactured by Sumitomo Chemical Co., Ltd.), etc.

[0388] Examples of sulfur-based antioxidants include, for example, dialkyl thiodipropionate compounds such as dilaurate thiodipropionate, dimyristyl thiodipropionate, or distearate thiodipropionate, and β-alkyl mercaptopropionate compounds of polyols such as tetra[methylene(3-dodecylthio)propionate]methane.

[0389] [Other ingredients]

[0390] Coloring and curing resin compositions may contain fillers, other polymers, adhesion promoters, light stabilizers, chain transfer agents, and other additives known in the art, as needed.

[0391] Examples of adhesion promoters include, for example, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltri(2-methoxyethoxy)silane, 3-glycidoxypropyltrimethoxysilane, 3-epoxypropoxypropylmethyldimethoxysilane, 3-epoxypropoxypropylmethyldiethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, and 3-thiopropyl... N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, N-2-(aminoethyl)-3-aminopropylmethyldiethoxysilane, 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, etc.

[0392] [Method for manufacturing color-curing resin compositions]

[0393] Colored curable resin compositions can be prepared, for example, by mixing a colorant (A), a resin (B), a polymerizable compound (C), a polymerization initiator (D), and a polymerization initiation aid (D1) as needed, a solvent (E), a leveling agent (F), an antioxidant (G), and other components.

[0394] Mixing can be carried out using known or conventional means and conditions.

[0395] The colorant (A) is preferably used in the form of a colorant (A) dispersion, which is pre-mixed with a portion or all of the solvent (E) and dispersed using a bead mill or similar device until the average particle size of the colorant (A) is about 0.2 μm or less. At this time, a portion or all of the dispersant and resin (B) may be added as needed.

[0396] The colorant (A) is preferably prepared by pre-dissolving part or all of the solvent (E) to form a solution. Furthermore, it is preferable to filter the solution using a filter with a pore size of approximately 0.01 μm to 1 μm.

[0397] Preferably, the mixed coloring and curing resin composition is filtered using a filter with a pore size of about 0.01 μm to 10 μm.

[0398] <Reflective film>

[0399] The display device is not particularly limited and may include a light-reflecting component for directing the light from the light source toward the mixture or the stacked structure described above.

[0400] There are no particular restrictions on the reflective film; it can include any suitable known material such as a reflector, a film that reflects particles, a reflective metal film, or a reflector.

[0401] <Diffusion membrane>

[0402] The display device is not particularly limited and may include a diffusion film for diffusing light emitted from a light source or a mixture thereof. The diffusion film may include any diffusion film known in the art, such as an amplifying diffusion film.

[0403] Brightness Enhancement Section

[0404] The display device of the present invention is not particularly limited and may include a brightness enhancement section that reflects and returns a portion of the light in the direction of light propagation.

[0405] Prism Sheets

[0406] A prism sheet typically comprises a substrate portion and a prism portion. It should be noted that the substrate portion may be omitted corresponding to adjacent components. The prism sheet can be attached to adjacent components via any suitable adhesive layer (e.g., an adhesive layer, a bonding agent layer). The prism sheet is composed of multiple unit prisms convex towards the side opposite to the viewing side (back side). By arranging the convex portions of the prism sheet towards the back side, light transmitted through the prism sheet is more easily focused. Furthermore, if the convex portions of the prism sheet are arranged towards the back side, compared to arranging the convex portions towards the viewing side, less light is reflected from the prism sheet, resulting in a brighter display.

[0407] Light guide plate

[0408] As a light guide plate, any suitable light guide plate can be used. For example, in order to deflect light from the lateral direction in the thickness direction, a light guide plate with a lens pattern formed on the back side, or a light guide plate with a prism shape formed on the back side and / or the viewing side, etc., can be used.

[0409] <Inter-element media material layer>

[0410] The display device of the present invention is not particularly limited, and can include layers composed of one or more dielectric materials in the optical path between adjacent elements (layers). Examples of the one or more dielectric materials include, for example, vacuum, air, gas, optical materials, adhesives, optical adhesives, glass, polymers, solids, liquids, gels, curing materials, optical bonding materials, refractive index matching or mismatched materials, refractive index gradient materials, coating or anti-coating materials, insulating materials, silicone, brightness enhancing materials, scattering or diffusing materials, reflective or antireflective materials, wavelength selective materials, wavelength selective antireflective materials, or other suitable media known in the above-mentioned technical fields, but are not limited thereto, and may include any suitable material.

[0411] As a specific example of a display device, one could cite a display device equipped with wavelength conversion materials for EL displays and liquid crystal displays. Specifically, examples include a display device in which a color conversion layer (B) is disposed between a light source (A) and a light guide plate along the end face (side) of the light guide plate, serving as a backlight that emits white light (on-edge type backlight), and a color filter (C) is disposed on the side of the light guide plate; a display device in which a color conversion layer (B) is disposed on a light guide plate, serving as a backlight that emits white light from light irradiated by a light source (A) placed on the end face (side) of the light guide plate through the light guide plate to the color conversion layer (B), serving as a surface-mount type backlight, and a color filter (C) is disposed on the color conversion layer (B); and a display device in which a quantum dot composition is disposed near the light-emitting part of the light source (A) to form a color conversion layer (B), serving as a backlight that emits white light from the irradiated light (on-chip type backlight), and a color filter (C) is disposed on the color conversion layer (B), etc.

[0412] The display device preferably has a light source (A), a color conversion layer (B), and a color filter (C) arranged sequentially and / or stacked in the optical path of the light from the light source (A).

[0413] Figure 3 This is a simplified cross-sectional view of a display device according to one embodiment of the present invention. Figure 3 The display device 100 shown includes a light source (A) 110, a color conversion layer (B) 120, and a color filter (C) 130. As shown, the display device 100 further includes a light guide plate 140.

[0414] The display device preferably has a color gamut coverage (hereinafter, sometimes referred to as coverage) of 54% or more according to Rec.ITU-R BT.2020, and an extraction efficiency of 30% or more, preferably a coverage of 65% or more and an extraction efficiency of 32% or more. It should be noted that the chromaticity coordinates (x, y) for red in Rec.ITU-R BT.2020 are (0.708, 0.292), for green are (0.170, 0.797), and for blue are (0.131, 0.046).

[0415] <Monitor>

[0416] like Figure 4 As shown, the display 200 of this embodiment includes a liquid crystal panel 201 and the display device 100 sequentially from the viewing side. The liquid crystal panel 201 typically includes a liquid crystal cell, a viewing-side polarizer disposed on the viewing side of the liquid crystal cell, and a back-side polarizer disposed on the back side of the liquid crystal cell. The display may further include any other suitable components.

[0417] LCD Panel

[0418] The aforementioned liquid crystal panel typically includes a liquid crystal cell, a viewing-side polarizer disposed on the viewing side of the liquid crystal cell, and a back-side polarizer disposed on the back side of the liquid crystal cell. The viewing-side polarizer and the back-side polarizer can be configured such that their respective absorption axes are substantially orthogonal or parallel.

[0419] [Liquid Crystal Unit]

[0420] A liquid crystal cell has a pair of substrates and a liquid crystal layer serving as a display medium sandwiched between the substrates. In a typical configuration, a color filter and a black matrix are provided on one substrate, while a switching element for controlling the electro-optical properties of the liquid crystal, a scan line providing gate signals to the switching element, a signal line providing source signals, a pixel electrode, and a counter electrode are provided on the other substrate. The spacing between the substrates (cell gap) can be controlled by spacers or the like. An alignment film, for example, made of polyimide, can be provided on the side of the substrate in contact with the liquid crystal layer.

[0421] [Polarizing filter]

[0422] A polarizer typically has a polarizer and protective layers disposed on both sides of the polarizer. A typical polarizer is an absorption-type polarizer.

[0423] As the aforementioned polarizer, any suitable polarizer can be used. Examples include films formed by uniaxially stretching hydrophilic polymer films such as polyvinyl alcohol (PVA) films, partially formalized PVA films, and partially saponified ethylene-vinyl acetate copolymer films after adsorbing iodine, dichroic dyes, or other dichroic substances; and polyolefin-based oriented films such as dehydrated PVA products and dehydrochlorinated polyvinyl chloride products. Among these, polarizers formed by uniaxially stretching PVA films after adsorbing iodine or other dichroic substances are particularly preferred due to their high dichroic polarization ratio.

[0424] Example

[0425] The present invention will now be described in more detail with reference to embodiments, but the present invention is not limited to the following embodiments. Unless otherwise specified, “%” and “parts” in the examples refer to mass % and mass parts.

[0426] <Determination of Spectral Curve I(x)>

[0427] Using a QE65Pro (manufactured by Ocean Optics Co., Ltd.), an electronically cooled, back-incident, high S / N fiber optic multi-channel beam splitter with fiber optics, the spectrum of a display device with a light conversion layer and a color filter arranged sequentially on the light source was measured at the front (0°). The distance between the display device and the detection unit was set to 30 mm. The maximum peak wavelength [nm] of each of the three wavelength ranges in spectral curve I(x)—above 380 nm and below 495 nm, 495 nm to 585 nm, and above 585 nm and below 780 nm—was measured. b，g，r and full width at half maximum (FWHM) [nm] b，g，r As shown in Table 1.

[0428] <Spectral curve T> b，g，r Determination of (x)

[0429] A UV-Vis-NIR spectrophotometer (UV-3600; manufactured by Shimadzu Corporation) equipped with an integrating sphere was used. The measurement substrate was a glass substrate with the color filter directly formed on it. The background was obtained from the glass substrate. The spectral curve T... b，g，r The maximum peak wavelength [nm] of (x) is shown in Table 1.

[0430] <Measurement of Color>

[0431] The spectral curve T measured above b，g，r (x) Calculate the chromaticity (x, y) and intensity respectively. The chromaticity (x, y) is the xy chromaticity coordinate (x, y) in the CIE XYZ color system.

[0432] <Determination of the peak wavelength of the light source>

[0433] The emission spectrum of the light source is measured using the spectrometer used in the measurement of the above-mentioned spectral curve I(x), and the peak wavelength of the light source is read from the measured emission spectrum.

[0434] <Measuring the Thickness of the Color Conversion Layer>

[0435] The film thickness was measured using a film thickness measuring device (DEKTAK3; manufactured by Nippon Vacuum Technology Co., Ltd.).

[0436] <Determination of the luminescence spectrum of quantum dots>

[0437] The absolute PL quantum yield was measured using an absolute PL quantum yield measuring apparatus (Hamamatsu Optoelectronics, trade name C9920-02, excitation light 450 nm, room temperature, atmospheric conditions). The maximum peak wavelength (λmax) [nm] and full width at half maximum (FWHM) [nm] were determined from the obtained emission spectrum.

[0438] Determination of the emission spectrum of perovskite fluorescent particles

[0439] The absolute PL quantum yield was measured using an absolute PL quantum yield measuring apparatus (Hamamatsu Optoelectronics, trade name C9920-02, excitation light 450 nm, room temperature, atmospheric conditions). The maximum peak wavelength (λmax) [nm] and full width at half maximum (FWHM) [nm] were determined from the obtained emission spectrum.

[0440] <Determination of weight-average molecular weight (Mw) and number-average molecular weight (Mn)>

[0441] The weight-average molecular weight (Mw) and number-average molecular weight (Mn) of resin (B) converted from polystyrene were determined using the GPC method under the following conditions.

[0442] Device: HLC-8120GPC (manufactured by Tosoh Corporation)

[0443] Pillar: TSK-GELG2000HXL

[0444] Column temperature: 40℃

[0445] Solvent: Tetrahydrofuran

[0446] Flow rate: 1.0 mL / min

[0447] The concentration of solid components in the analytical sample was 0.001–0.01% by mass.

[0448] Injection volume: 50 μL

[0449] Detector: RI

[0450] Calibration standard materials: TSK STANDARD POLYSTYRENE F-40, F-4, F-288, A-2500, A-500 (manufactured by Tosoh Corporation)

[0451] The ratio (Mw / Mn) of the weight-average molecular weight (Mw) to the number-average molecular weight (Mn) of the polystyrene obtained above is used as the dispersity.

[0452] <Determination of α>

[0453] Using the spectral curve I(x) obtained above, calculate α for condition (I) according to the following formula. Here, the following formula h(x) represents the ratio of the intensity at the wavelength corresponding to the spectral curve I(x) in the wavelength range of 440 < x < 460, 520 < x < 540, 620 < x < 650 nm to the region of the spectral curve I(x) in the wavelength range of 380 nm ≤ x < 495 nm, 495 nm ≤ x ≤ 585 nm, 585 nm ≤ x ≤ 780 nm when the intensity in the wavelength range of 440 < x < 460, 520 < x < 540, 620 < x < 650 nm is set to zero.

[0454] [Number 2]

[0455]

[0456]

[0457] <Determination of β>

[0458] The spectral curves T of each filter were measured. b，g，r (x), calculate β for condition (II) according to the following formula. Here, the following formula j(x) represents the following function: the transmittance is zero in the wavelength ranges 380nm≤x<440nm, 460nm<x<520nm, 540nm<x<620nm and 650nm<x≤780nm, and the transmittance versus spectral curve T in the wavelength ranges 440nm≤x≤460nm, 520nm≤x≤540nm and 620nm≤x≤650nm. b，g，r The transmittance at the wavelength corresponding to (x) is equal.

[0459] [Number 3]

[0460]

[0461]

[0462] Coverage

[0463] When the area of ​​the overlapping portion of the color gamut bounded by the coordinates (x, y) calculated from the xy chromaticity coordinates (x, y) measured according to the above "chromaticity measurement" is defined as Y1, and the area of ​​the color gamut bounded by the coordinates of BT2020 is defined as Y2, it is calculated by the following formula:

[0464] Y = (Y1 / Y2) × 100.

[0465] <Extraction Efficiency>

[0466] The integrated intensities Zb, Zg, and Zr of the emitted spectra from the blue, green, and red filters configured on the display device were measured respectively, and the extraction efficiency Z was calculated according to the following formula.

[0467] Z = [(Zr + Zg + Zb) / 3Zb] × 100

[0468] <Performance Evaluation Values>

[0469] It is calculated according to the following formula.

[0470] Performance value = (Y×Z) / 100

[0471] Y: Coverage

[0472] Z: Extraction efficiency

[0473] <Synthesis Example 1> Resin (F2)

[0474] A suitable amount of nitrogen was poured into a flask equipped with a reflux condenser, a dropping funnel, and a stirrer to replace the atmosphere with nitrogen. 371 parts of propylene glycol monomethyl ether acetate were added, and the mixture was heated to 85°C while stirring. Next, 54 parts of acrylic acid and 3,4-epoxytricyclic acrylic acid [5.2.1.0] were added. 2，6 ] Decane-8-yl ester and 3,4-epoxytricyclic acrylate [5.2.1.0] 2，6 A mixed solution prepared by dissolving 225 parts of a mixture of decane-9-yl esters (containing 50:50 molar ratio) and 81 parts of vinyltoluene (a mixture of isomers) in 80 parts of propylene glycol monomethyl ether acetate was added dropwise to a flask over 4 hours. Meanwhile, a solution obtained by dissolving 30 parts of the polymerization initiator 2,2-azobis(2,4-dimethylpentanonitrile) in 160 parts of propylene glycol monomethyl ether acetate was added dropwise over 5 hours. After the addition of the initiator solution was completed, the solution was maintained 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 10600.

[0475] <Preparation of the light source>

[0476] Light source 1: A blue light-emitting diode with a maximum peak wavelength at 443nm.

[0477] Light source 2: Blue light-emitting diode with a maximum peak wavelength at 460nm

[0478] <Preparation of Red Fluorescent Particles>

[0479] Red fluorescent particle 1: Quantum dot 1 (CdSe / ZnSeS), maximum peak wavelength: 640nm, full width at half maximum (FWHM): 24nm

[0480] Red fluorescent particle 2: Quantum dot 2 (CdSe / ZnSeS), maximum peak wavelength: 635nm, full width at half maximum (FWHM): 24nm

[0481] Red fluorescent particle 3: Quantum dot 3 (CdSe / ZnSeS), maximum peak wavelength: 646nm, full width at half maximum (FWHM): 28nm

[0482] Red fluorescent particle 4: Quantum dot 4 (CdSe / ZnSeS), maximum peak wavelength: 608 nm, full width at half maximum (FWHM): 44 nm

[0483] <Preparation of Red Fluorescent Particle Dispersion>

[0484] A toluene dispersion containing 10% red fluorescent particles 1–4 was mixed with dispersant BYK-LP N6919 at a solid ratio of 1:1 to obtain quantum dot dispersions Q1–4. The concentration of the toluene dispersion was determined by TG-DTA of the mixture after toluene removal, calculated from the balance after heating to 550°C at a heating rate of 5°C / min.

[0485] <Preparation of Green Fluorescent Particles>

[0486] Green fluorescent particle 1: Perovskite 1 (CsPbBr3) coated with polysilazane, maximum peak wavelength: 535 nm, full width at half maximum (FWHM): 20 nm

[0487] Green fluorescent particle 2: Perovskite 2 (FAPbBr3) coated with polysilazane, maximum peak wavelength: 540 nm, full width at half maximum (FWHM): 19 nm

[0488] Green fluorescent particle 3: Perovskite 3 (FAPbBr3) coated with polysilazane, maximum peak wavelength: 530 nm, full width at half maximum (FWHM): 23 nm

[0489] Green fluorescent particle 5: Quantum dot 5 (CdSe / ZnSeS), maximum peak wavelength: 542nm, full width at half maximum (FWHM): 35nm

[0490] Green fluorescent particle 6: Quantum dot 6 (CdSe / ZnS), maximum peak wavelength: 527nm, full width at half maximum (FWHM): 34nm

[0491] <Preparation of Green Fluorescent Particle Dispersion>

[0492] Prepare toluene dispersions P1-3 containing 10% green fluorescent particles 1-3. The concentration of the toluene dispersions is determined by TG-DTA of the mixture after toluene removal, calculated from the balance after heating to 550°C at a heating rate of 5°C / min.

[0493] A toluene dispersion containing 10% green fluorescent particles 5 and dispersant BYK-LP N6919 were mixed at a solid ratio of 1:1 to obtain green fluorescent particle dispersion Q5.

[0494] <Preparation of scattering agent dispersion>

[0495] The dispersion was obtained by mixing 60 parts of titanium oxide particles (equivalent to 5 parts of solid components) with dispersant BYK-LP N6919 and PGMEA in a total of 100 parts and then using a bead mill to fully disperse the titanium oxide particles.

[0496] <Preparation of Color Conversion Compositions>

[0497] Quantum dot compositions 1 to 6 were prepared by mixing the materials in the manner shown in Table 1, with the solid component ratios listed.

[0498] [Table 1]

[0499]

[0500] IBXA: Isoborneol Acrylate

[0501] TMPTA: Trimethylolpropane triacrylate

[0502] <Creating a Color Conversion Layer>

[0503] The color conversion layer is fabricated according to the composition in Table 2. The color conversion layer is applied to the lower substrate to achieve the specified thickness using a rod coating method. After drying at 80°C for 3 minutes, it is bonded to the upper substrate and cured by exposure to 200 mJ UV light through the substrate. When the upper substrate is not used, the color conversion layer is cured by exposure under a nitrogen atmosphere.

[0504] [Table 2]

[0505]

[0506] <Preparation of Pigment Dispersions Ph-1 to Ph-4>

[0507] The pigments were mixed according to the composition and ratio shown in Table 3 below to obtain pigment dispersions Ph-1 to Ph-4.

[0508] [Table 3]

[0509]

[0510] Unit: parts by weight

[0511] Blue pigment (P1): CI Pigment Blue 15:6

[0512] Green pigment (P2): CI pigment green 36

[0513] Yellow pigment (P3): CI Pigment Yellow 150

[0514] Red pigment (P4): CI Pigment Red 254

[0515] Pigment dispersants: Solvent-based pigment dispersants

[0516] Resin (F3): methacrylic acid / benzyl methacrylate copolymer (copolymer ratio (mass ratio): 30 / 70, Mw: 1.2×10⁻⁶) 4

[0517] Solvent (K1): Propylene glycol monomethyl ether acetate (PGMEA)

[0518] Solvent (K2): Propylene glycol 1-monomethyl ether (PGME)

[0519] <Preparation of Colored Curing Resin Compositions>

[0520] The components in Table 4 were mixed to obtain color-curable resin compositions (D-b1), (D-b2), (D-g1), and (D-r1) for forming a light-absorbing layer. In Table 4, the parts of resin represent the values ​​converted from solid components.

[0521] [Table 4]

[0522]

[0523] Polymerizing compound (G2): Dipentaerythritol hexaacrylate, trade name: KAYARAD (registered trademark), DPHA: manufactured by Nippon Kayaku Co., Ltd.

[0524] Polymerization initiator (H2): N-benzoyloxy-1-(4-phenylthiophenyl)octane-1-one-2-imine, trade name: Irgacure (registered trademark) OXE-01: manufactured by BASF.

[0525] Leveling agent (J2): Polyether-modified silicone oil, trade name: Toray Silicone SH8400, manufactured by Dow ComingToray Co., Ltd.

[0526] <Example 1>

[0527] A color-curing resin composition (D-r1) for color filters was spin-coated onto a 5cm square glass substrate (EAGLE 2000; manufactured by CORNING Co., Ltd.), and then pre-baked at 100°C for 3 minutes to form a red curing resin composition layer. The substrate with the red curing resin composition layer was then exposed to atmospheric pressure at 100mJ / cm² using an exposure machine (TME-150RSK; manufactured by TOPCON Co., Ltd.). 2 The film was irradiated with light at an exposure level (365nm reference), developed, and then baked 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 prepared on the substrate used to prepare the red color filter (C-r1) using a green curable resin composition (D-g1), and then a blue color filter (C-b1) was prepared using a blue curable resin composition (D-b1). This resulted in the fabrication of color filter (C).

[0528] A display device was manufactured according to the manufacturing conditions shown in Table 5, with a color filter (C) placed on the light source (A) in such a way that the color conversion layer (B) was arranged. The evaluation results are shown in Table 5.

[0529] <Examples 2-6, Comparative Examples 1 and 2>

[0530] Except for the materials and film thicknesses shown in Table 5, the display device was fabricated in the same manner as in Example 1. The evaluation results are shown in Table 5.

[0531] [Table 5]

[0532]

[0533] In the table, the types of light source (A) and color conversion layer (B) used in each embodiment and comparative example are indicated by “○” in the corresponding column. In the column for color filters (C), the type of color curable resin composition used in color filters C-b1, C-g1 and C-r1 is shown together with the thickness of the color filter [μm].

[0534] Symbol Explanation

[0535] 10, 20, 30 non-overlapping areas, 40 overlapping areas, 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), The color conversion layer (B) contains quantum dots (B-r) that emit red light. The color filter (C) has a blue color filter (C-b), a green color filter (C-g), and a red color filter (C-r). The display device satisfies the following conditions (I) and (II), (I)α≤1.80 (II) β≥63.0 in, α＝α b +α g +α r ， β＝β b +β g +β r ， In the spectral curve I(x) obtained by plotting the intensity I of the light emitted from the color conversion layer (B) relative to the wavelength x when light from the light source (A) is applied, When the pulse function, which is 0 in the wavelength ranges 380nm≤x<440nm, 460nm<x<520nm, 540nm<x<620nm, and 650nm<x≤780nm, and has a value equal to the maximum intensity of the spectral curve I(x) in the wavelength ranges 440nm≤x≤460nm, 520nm≤x≤540nm, and 620nm≤x≤650nm, is represented by the function f(x), α b This represents the proportion of the region of the spectral curve I(x) in the wavelength range of 380nm ≤ x < 495nm that does not overlap with the region of the function f(x). α g This represents the proportion of the region of the spectral curve I(x) in the wavelength range of 495nm ≤ x ≤ 585nm that does not overlap with the region of the function f(x). α r This represents the proportion of the region of the spectral curve I(x) in the wavelength range of 585nm < x ≤ 780nm that does not overlap with the region of the function f(x). The transmittance T of the blue filter (C-b) b The spectral curve T obtained by plotting relative to wavelength x b (x) The transmittance T of the green filter (C-g) g The spectral curve T obtained by plotting relative to wavelength x g (x), and The transmittance T of the red color filter (C-r) r The spectral curve T obtained by plotting relative to wavelength x r In (x), When the pulse function with transmittance of 0 in the wavelength ranges 380nm≤x<440nm, 460nm<x<520nm, 540nm<x<620nm, and 650nm<x≤780nm, and with transmittance of 100% in the wavelength ranges 440nm≤x≤460nm, 520nm≤x≤540nm, and 620nm≤x≤650nm is represented by the function g(x), β b The spectral curve T represents the wavelength range of 440 nm ≤ x ≤ 460 nm. b The area of ​​the region where the region of function g(x) overlaps with the region of function g(x). β g The spectral curve T represents the wavelength range of 520 nm ≤ x ≤ 540 nm. g The area of ​​the region where the region of function g(x) overlaps with the region of function g(x). β r The spectral curve T represents the wavelength range of 620 nm ≤ x ≤ 650 nm. r The area of ​​the region where the region of function g(x) overlaps with the region of function g(x).

2. The display device according to claim 1, wherein, The light source (A) emits light with a peak at a wavelength below 600 nm.

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

4. The display device according to claim 1 or 2, wherein, The spectral curve I(x) has peaks in the wavelength ranges of 440nm~460nm, 520nm~540nm and 620nm~650nm, respectively, and the half width of each peak is 20nm~80nm.

5. The display device according to claim 1 or 2, wherein, The quantum dot (B-r) that emits red light contains at least one of particles selected from indium compounds and cadmium compounds.

6. The display device according to claim 1 or 2, wherein, The thickness of the color conversion layer (B) is 1 μm to 300 μm.

7. The display device according to claim 1 or 2, wherein, The spectral curve T b (x) has a peak in the wavelength range of 440 nm to 460 nm.

8. The display device according to claim 1 or 2, wherein, The spectral curve T g (x) has a peak in the wavelength range of 520 nm to 540 nm.

9. The display device according to claim 1 or 2, wherein, The spectral curve T r (x) has a peak in the wavelength range of 620 nm to 660 nm.

10. The display device according to claim 1 or 2, wherein, The color gamut coverage of Rec.ITU-R BT.2020 is over 54%, and the extraction efficiency is over 30%.

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

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