Color filter and display device including color filter

Abstract

To provide a patterned color filter with which it is possible to dispense with repeated lithographic exposure and development for each of red, blue, and green colors and reduce the number of repetitions of lithographic exposure and development.SOLUTION: Provided is a color filter indicating an absorption spectrum having one or more minimum absorption wavelengths in each of wavelengths 410-480 nm and 510-560 nm and one or more maximum absorption wavelengths in each of wavelengths 480-510 nm and 560-600 nm and satisfying all of Av1 / Av2<1, Ap1 / Ap2<1, (Av1+Av2+A730) / 3≤0.25, Ap2>0.35, Ap1>0.25, where Av1 represents the minimum value of absorbance in a minimum absorption wavelength in wavelengths 410-480 nm; Av2 represents the minimum value of absorbance in a minimum absorption wavelength in wavelengths 510-560 nm; Ap1 represents the maximum value of absorbance in a maximum absorption wavelength in wavelengths 480-510 nm; Ap2 represents the maximum value of absorbance in a maximum absorption wavelength in wavelengths 560-600 nm; and A730 represents absorbance in wavelength 730 nm.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a color filter and a display device including the color filter. [Background technology]

[0002] Organic electroluminescence (hereinafter referred to as OLED) display devices have been rapidly gaining popularity in recent years due to their high contrast ratio, excellent color reproducibility, wide viewing angle, fast response, thin and lightweight design, and high flexibility. While OLED display devices are known to have a light-emitting element for each pixel that emits light of each of the three primary colors (RGB), the color purity of the light emitted from each color's light-emitting element may not be sufficient. Therefore, OLED display devices sometimes use color filters to enhance the color purity of the light emitted from each color's light-emitting element.

[0003] Typically, color filters are composed of a red color filter for adjusting the color purity of red light emitted from a red light-emitting section (i.e., the color purity of a red pixel), a blue color filter for adjusting the color purity of blue light emitted from a blue light-emitting section (i.e., the color purity of a blue pixel), and a green color filter for adjusting the color purity of green light emitted from a green light-emitting section (i.e., the color purity of a green pixel). These color filters of each color are patterned because they need to be arranged in a position facing the light-emitting section of that color (Patent Document 1). Specifically, the red color filter is patterned to arrange the red color filter in a position facing the red light-emitting section, the blue color filter is patterned to arrange the blue color filter in a position facing the blue light-emitting section, and the green color filter is patterned to arrange the green color filter in a position facing the green light-emitting section. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-170644 Summary of the Invention [Problem to be solved by the invention]

[0005] To pattern a red color filter, a blue color filter, and a green color filter, it is necessary to repeat exposure and development according to each pattern. Even when patterning, if the repeated exposure and development for each of red, blue, and green can be omitted, improvement in manufacturing efficiency can be expected. Furthermore, even when patterning, if it is possible to form a pattern spanning the red, blue, and green light-emitting sections, rather than forming a pattern for each of the red, blue, and green light-emitting sections, the repeated exposure and development for each of the red, blue, and green can be omitted, and improvement in manufacturing efficiency can be expected.

[0006] Therefore, an object of the present invention is to provide a patternable color filter that does not require repeated exposure and development for each of red, blue, and green colors, thereby reducing the number of repeated exposure and development steps. [Means for solving the problem]

[0007] That is, the gist of the present invention is as follows. [1] A color filter composed of a cured product of a photocurable composition containing a colorant and an alkali-soluble resin, A color filter exhibiting an absorption spectrum that satisfies all of the following requirements (1) to (6): (1) Having one or more minimum absorption wavelengths in the wavelength range of 410 to 480 nm, one or more maximum absorption wavelengths in the wavelength range of 480 to 510 nm, one or more minimum absorption wavelengths in the wavelength range of 510 to 560 nm, and one or more maximum absorption wavelengths in the wavelength range of 560 to 600 nm (2) Av1 / Av2<1 (3) Ap1 / Ap2<1 (4)(Av1+Av2+A730) / 3≦0.25 (5) Ap2>0.35 (6) Ap1>0.25 Av1: Minimum absorbance at the minimum absorption wavelength between 410 and 480 nm Av2: Minimum absorbance at the minimum absorption wavelength between 510 and 560 nm Ap1: Maximum absorbance at the maximum absorption wavelength between 480 and 510 nm Ap2: Maximum absorbance at the maximum absorption wavelength between 560 and 600 nm A730: absorbance at a wavelength of 730 nm [2] The color filter according to [1], wherein the colorant contains a pigment. [3] The color filter according to [2], wherein the pigment includes a pigment having a quinacridone skeleton. [4] The color filter according to any one of [1] to [3], wherein the value of (Av1+Av2+A730) / 3 in the requirement (4) is 0.1 or more. [5] The color filter according to any one of [1] to [4], which is patterned. [6] The color filter according to any one of [1] to [5], which has a film thickness of 0.5 to 4 μm. [7] A display device comprising the color filter according to any one of [1] to [6]. [Effects of the Invention]

[0008] The color filter of the present invention is a cured product of a photocurable composition containing an alkali-soluble resin, and therefore can be patterned. Furthermore, since the color filter has a specific absorption spectrum, it can be commonly applied to the red, blue, and green light-emitting portions, and therefore it is possible to reduce the number of times exposure and development are repeated. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic cross-sectional view showing an example of a display device of the present invention. [Figure 2] FIG. 2 shows the absorption spectrum of the color filter obtained in Example 1. DETAILED DESCRIPTION OF THE INVENTION

[0010] <Color filter> The color filter of the present invention exhibits an absorption spectrum that satisfies all of the following requirements (1) to (6). (1) Having one or more minimum absorption wavelengths in the wavelength range of 410 to 480 nm, one or more maximum absorption wavelengths in the wavelength range of 480 to 510 nm, one or more minimum absorption wavelengths in the wavelength range of 510 to 560 nm, and one or more maximum absorption wavelengths in the wavelength range of 560 to 600 nm (2) Av1 / Av2<1 (3) Ap1 / Ap2<1 (4)(Av1+Av2+A730) / 3≦0.25 (5) Ap2>0.35 (6) Ap1>0.25 Av1: Minimum absorbance at the minimum absorption wavelength between 410 and 480 nm Av2: Minimum absorbance at the minimum absorption wavelength between 510 and 560 nm Ap1: Maximum absorbance at the maximum absorption wavelength between 480 and 510 nm Ap2: Maximum absorbance at the maximum absorption wavelength between 560 and 600 nm A730: absorbance at a wavelength of 730 nm

[0011] The absorption spectrum of a color filter can be obtained by measuring the transmittance in the wavelength range of 300 nm to 780 nm at 1 nm intervals using an ultraviolet-visible spectrophotometer and converting this to absorbance. When measuring the transmittance of a color filter, the measurement may be performed in a state where a transparent substrate such as a glass substrate is laminated on one side, and specifically, the measurement can be performed by the method described in the examples below.

[0012] When the absorption spectrum of the color filter satisfies the above requirements (1) to (6), it becomes possible to separate light into the desired red, green, and blue using a film of the same composition, and it is possible to provide a color filter that can improve the color purity of each color pixel without having to pattern each red-, blue-, and green-emitting portion separately.

[0013] As per the above requirement (1), the color filter of the present invention has, in its absorption spectrum, one or more absorption minimum wavelengths in the wavelength range of 410 to 480 nm, one or more absorption maximum wavelengths in the wavelength range of 480 to 510 nm, one or more absorption minimum wavelengths in the wavelength range of 510 to 560 nm, and one or more absorption maximum wavelengths in the wavelength range of 560 to 600 nm.

[0014] The absorption spectrum of the color filter of the present invention may have one or more minimum absorption wavelengths in the wavelength range of 410 to 480 nm, but preferably has one. In this specification, the minimum value of absorbance at a minimum absorption wavelength in the wavelength range of 410 to 480 nm is referred to as "Av1." That is, when there is one minimum absorption wavelength in the wavelength range of 410 to 480 nm, the absorbance at that minimum absorption wavelength is referred to as Av1, and when there are two or more minimum absorption wavelengths in the wavelength range of 410 to 480 nm, the minimum absorbance among the multiple minimum absorption wavelengths is referred to as Av1. From the viewpoint of improving the luminance of the blue pixel, Av1 is preferably 0.40 or less, more preferably 0.35 or less, and even more preferably 0.30 or less. From the viewpoint of improving the antireflection ability, Av1 is preferably 0.10 or more, more preferably 0.13 or more, and even more preferably 0.16 or more.

[0015] The absorption spectrum of the color filter of the present invention may have one or more minimum absorption wavelengths in the wavelength range of 510 to 560 nm, and preferably has one or two. In this specification, the minimum value of absorbance at a minimum absorption wavelength in the wavelength range of 510 to 560 nm is referred to as "Av2." That is, when there is one minimum absorption wavelength in the wavelength range of 510 to 560 nm, the absorbance at that minimum absorption wavelength is referred to as Av2, and when there are two or more minimum absorption wavelengths in the wavelength range of 510 to 560 nm, the minimum absorbance among the multiple absorbances at the minimum absorption wavelengths is referred to as Av2. From the viewpoint of improving the luminance of the green pixel, Av2 is preferably 0.40 or less, more preferably 0.37 or less, and even more preferably 0.33 or less. From the viewpoint of improving the antireflection ability, Av2 is preferably 0.10 or more, more preferably 0.15 or more, and even more preferably 0.18 or more.

[0016] The absorption spectrum of the color filter of the present invention may have one or more absorption maximum wavelengths in the wavelength range of 480 to 510 nm, but preferably has one. In this specification, the maximum value of absorbance at the absorption maximum wavelength in the wavelength range of 480 to 510 nm is referred to as "Ap1." That is, when there is one absorption maximum wavelength in the wavelength range of 480 to 510 nm, the absorbance at the absorption maximum wavelength is referred to as Ap1, and when there are two or more absorption maximum wavelengths in the wavelength range of 480 to 510 nm, the maximum absorbance among the multiple absorption maximum wavelengths is referred to as Ap1. As described in the above requirement (6), Ap1 is greater than 0.25, preferably 0.28 or greater, and more preferably 0.35 or greater. By adjusting Ap1 within the above range, the color separation between blue and green pixels can be improved, and the color purity of the blue and green pixels can be enhanced. Furthermore, from the viewpoint of preventing a decrease in the luminance of the blue and green pixels, Ap1 is preferably 0.70 or less, more preferably 0.60 or less, and even more preferably 0.55 or less. However, Ap1 is greater than Av1 and Av2.

[0017] The absorption spectrum of the color filter of the present invention may have one or more absorption maximum wavelengths in the wavelength range of 560 to 600 nm, but preferably has one. In this specification, the maximum value of absorbance at the absorption maximum wavelength in the wavelength range of 560 to 600 nm is referred to as "Ap2." That is, when there is one absorption maximum wavelength in the wavelength range of 560 to 600 nm, the absorbance at that absorption maximum wavelength is referred to as Ap2, and when there are two or more absorption maximum wavelengths in the wavelength range of 560 to 600 nm, the maximum absorbance among the multiple absorbances at the absorption maximum wavelengths is referred to as Ap2. As described in the above requirement (5), Ap2 is greater than 0.35, preferably 0.4 or greater, and more preferably 0.5 or greater. By adjusting Ap2 within the above range, the color separation between green and red pixels can be improved, and the color purity of the green and red pixels can be enhanced. Furthermore, from the viewpoint of preventing a decrease in the luminance of the green and red pixels, Ap2 is preferably 2.0 or less, more preferably 1.6 or less, and even more preferably 1.4 or less. However, Ap2 is greater than Av2.

[0018] In the absorption spectrum of the color filter of the present invention, the absorbance at a wavelength of 730 nm (A730) is preferably 0.25 or less, more preferably 0.23 or less, and even more preferably 0.20 or less. By adjusting A730 within the above range, a decrease in the brightness of the red pixel can be suppressed. Furthermore, from the viewpoint of preventing reflection of external light, A730 is preferably 0.08 or more, more preferably 0.12 or more, and even more preferably 0.15 or more.

[0019] In the absorption spectrum of the color filter of the present invention, the absorbance at a wavelength of 365 nm (A365) is preferably 0.1 to 2.5, more preferably 0.2 to 1.5, and even more preferably 0.3 to 0.9, from the viewpoint of increasing exposure sensitivity.

[0020] The difference between Ap1 and Av1 (Ap1-Av1) is preferably 0.05 or more, more preferably 0.08 or more, and even more preferably 0.10 or more. By adjusting the value of Ap1-Av1 within the above range, the color purity of the blue light emitted from the blue light-emitting portion can be further increased. The upper limit of Ap1-Av1 may be, for example, 0.5. Furthermore, the difference between Ap1 and Av2 (Ap1-Av2) is preferably 0.05 or more, more preferably 0.07 or more, and even more preferably 0.10 or more. By adjusting the value of Ap1-Av2 within the above range, the color purity of the green light emitted from the green light-emitting portion can be further increased. The upper limit of Ap1-Av2 may be, for example, 0.5. Furthermore, the difference between Ap2 and Av2 (Ap2-Av2) is preferably 0.15 or more, more preferably 0.20 or more, and even more preferably 0.25 or more. By adjusting the value of Ap2-Av2 within the above range, the color purity of the green light emitted from the green light-emitting portion can be further increased. The upper limit of Ap1-Av2 may be, for example, 0.8. Furthermore, the difference between Ap2 and A730 (Ap2-A730) is preferably 0.20 or more, more preferably 0.27 or more, and even more preferably 0.35 or more. By adjusting the value of Ap2-A730 within the above range, the color purity of the red light emitted from the red light-emitting portion can be further improved. The upper limit of Ap2-A730 may be, for example, 1.0. The difference between A365 and Av1 (A365-Av1) is preferably 0.1 to 2.4, more preferably 0.1 to 1.6, and even more preferably 0.2 to 1.0. By adjusting the value of A365-Av1 within the above range, both antireflection ability and exposure sensitivity can be achieved.

[0021] The absorption spectrum of the color filter of the present invention satisfies Av1 / Av2<1, as described in the above requirement (2). Av1 / Av2 is preferably 0.1 to 0.95, more preferably 0.3 to 0.90, and even more preferably 0.5 to 0.85. When Av1 / Av2 is in the above range, the luminance of the green pixel can be slightly reduced relative to the luminance of the blue pixel, thereby achieving good white balance. Furthermore, the absorption spectrum of the color filter of the present invention satisfies Ap1 / Ap2<1, as described in the above requirement (3). Ap1 / Ap2 is preferably 0.1 to 0.90, more preferably 0.3 to 0.85, and even more preferably 0.5 to 0.82. When Ap1 / Ap2 is within the above range, the color purity of the three blue, green, and red pixels can be increased while maintaining high luminance of the blue and green pixels.

[0022] The absorption spectrum of the color filter of the present invention satisfies (Av1 + Av2 + A730) / 3≦0.25, as described in the above-mentioned requirement (4). This allows the aforementioned color purity improvement effect to be imparted without reducing the brightness. From the viewpoint of further increasing the brightness, the value of (Av1 + Av2 + A730) / 3 is preferably 0.24 or less, and more preferably 0.23 or less. The value of (Av1+Av2+A730) / 3 is preferably 0.1 or more, more preferably 0.13 or more, and even more preferably 0.15 or more. By adjusting the value of (Av1+Av2+A730) / 3 within the above range, a color filter with excellent antireflection properties can be obtained, and a display device with excellent antireflection properties can be provided without laminating a separate film with antireflection properties.

[0023] The difference between Av1 and A730 and the difference between Av2 and A730 are preferably small. The absolute value of the difference between Av1 and A730 (|Av1-A730|) is preferably 0.45 or less, more preferably 0.30 or less, and even more preferably 0.15 or less. The absolute value of the difference between Av2 and A730 (|Av2-A730|) is preferably 0.45 or less, more preferably 0.35 or less, and even more preferably 0.25 or less.

[0024] The thickness of the color filter of the present invention is not particularly limited and can be adjusted appropriately depending on the purpose, use, etc. The thickness is, for example, 0.1 to 30 μm, preferably 0.1 to 20 μm, more preferably 0.3 to 6 μm, and even more preferably 0.5 to 4 μm. In particular, the color filter of the present invention can enhance the color purity of light emitted from the light-emitting portions of each color, even though it is a thin film, for example, 4 μm or less.

[0025] The color filter of the present invention is preferably patterned. As described above, the color filter of the present invention can separate light into the desired red, green, and blue using a film of the same composition, so patterning for each red-, blue-, and green-emitting portion (i.e., patterning for each pixel) is not necessary. However, if necessary, patterning may be performed according to the position of each red-, blue-, and green-emitting portion. Even in this case, patterning can be achieved by performing a series of processes including masking, exposure, and development (hereinafter, this series of processes will be referred to as a development process, or sometimes referred to as patterning) only once. Furthermore, since there are portions where no color filter is required, such as spaces used for bonding pads, it is preferable to perform a development process (patterning) to remove such unnecessary portions. The size of the portions (each pattern) remaining after development is not particularly limited, but since patterning for each red-, blue-, and green-emitting portion is not required, they can be larger than conventional patterns. For example, in the case of a typical micro organic EL display device, pattern formation of about 1 to 10 μm is required, but in the color filter of the present invention, pattern formation of about 10 μm to 1 cm (preferably about 100 μm to 1 cm) can fulfill both the roles of color separation and anti-reflection.

[0026] <Photocurable composition> The color filter of the present invention is composed of a cured product of a photocurable composition containing a colorant and an alkali-soluble resin. The photocurable composition will be described in detail below.

[0027] The photocurable composition contains a colorant (hereinafter, may be referred to as colorant (A)) and an alkali-soluble resin (hereinafter, may be referred to as alkali-soluble resin (B)). The photocurable composition preferably further contains a polymerizable compound (hereinafter, sometimes referred to as a polymerizable compound (C)) and a polymerization initiator (hereinafter, sometimes referred to as a polymerization initiator (D)). The photocurable composition preferably further contains a solvent (hereinafter, sometimes referred to as solvent (E)). The photocurable composition may contain a leveling agent (hereinafter, may be referred to as leveling agent (F)). Each component contained in the photocurable composition will be described in detail below. In this specification, the compounds exemplified as each component can be used alone or in combination, unless otherwise specified.

[0028] <Colorant (A)> The colorant (A) contained in the photocurable composition may be either a dye or a pigment, but preferably contains a pigment because this tends to improve the heat resistance and / or solvent resistance of the color filter. The content of the pigment in 100% by mass of the colorant (A) contained in the photocurable composition is preferably 30 to 100% by mass, more preferably 55 to 98% by mass, and even more preferably 70 to 95% by mass.

[0029] The pigment can be appropriately selected so as to obtain a desired absorption spectrum, and examples thereof include pigments classified as pigments in the Color Index (published by The Society of Dyers and Colourists). Examples of pigments classified as pigments include yellow pigments such as CI Pigment Yellow 1 (hereinafter, the term CI Pigment Yellow will be omitted and only the numbers will be used; the same applies to the others), 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, 180, 185, 194, 214, and 231; Orange pigments such as CI Pigment Orange 13, 31, 36, 38, 39, 40, 42, 43, 48, 49, 51, 55, 59, 61, 64, 65, 71, 73; Red pigments such as CI Pigment Red 9, 97, 105, 122, 144, 149, 166, 168, 176, 177, 180, 190, 192, 202, 209, 215, 216, 224, 242, 254, 255, 264, 265, 266, 268, 269, 273, 291; Blue pigments such as CI Pigment Blue 15, 15:1, 15:2, 15:3, 15:4, 15:6, 16, 60; Purple pigments such as CI Pigment Violet 1, 19, 23, 29, 32, 36, 38; Green pigments such as CI Pigment Green 7, 36, 58, 59, 62, 63; Brown pigments such as CI Pigment Brown 23 and 25; Black pigments such as CI Pigment Black 1 and 7;

[0030] Furthermore, as the blue pigment, compounds (aluminum phthalocyanine pigments) described in JP-A Nos. 2013-79301, 2013-87251, and WO 2022 / 024926 may be used.

[0031] One or more of these pigments may be used for each color, or pigments of each color may be combined.

[0032] The pigments may be appropriately selected so that the absorption spectrum of the resulting color filter satisfies the above requirements (1) to (6). Preferably, the pigment contains at least two pigments selected from the group consisting of yellow pigments, orange pigments, red pigments, blue pigments, violet pigments, and green pigments; more preferably, the pigment contains at least two pigments selected from the group consisting of yellow pigments, red pigments, blue pigments, and violet pigments; even more preferably, the pigment contains a red pigment and / or a violet pigment and a blue pigment and / or a yellow pigment; even more preferably, the pigment contains a red pigment and / or a violet pigment, a blue pigment, and a yellow pigment; and particularly preferably, the pigment contains a yellow pigment, a red pigment, and a blue pigment. The total content of the red pigment and the purple pigment is preferably 10 to 98 mass%, more preferably 40 to 90 mass%, even more preferably 55 to 85 mass%, and particularly preferably 60 to 80 mass%, based on 100 mass% of the total pigments contained in the photocurable composition. The content of the yellow pigment is, for example, 0 to 30 mass %, preferably 1 to 20 mass %, and more preferably 5 to 15 mass %, relative to 100 mass % of the total pigments contained in the photocurable composition. The content of the blue pigment is preferably 1 to 40 mass %, more preferably 5 to 35 mass %, and even more preferably 10 to 30 mass %, relative to 100 mass % of the total pigments contained in the photocurable composition. The total content of the red pigment, purple pigment, yellow pigment, and blue pigment is preferably 40% by mass or more, more preferably 70% by mass or more, and even more preferably 90% by mass or more, relative to 100% by mass of the total pigments contained in the photocurable composition. The content of the yellow pigment relative to 100 parts by mass of the total of the red pigment and the purple pigment is, for example, 0 to 80 parts by mass, preferably 1 to 50 parts by mass, more preferably 5 to 40 parts by mass, and even more preferably 10 to 30 parts by mass. The content of the blue pigment relative to 100 parts by mass of the total of the red pigment and the purple pigment is preferably 1 to 80 parts by mass, more preferably 10 to 50 parts by mass, and even more preferably 20 to 35 parts by mass.

[0033] Furthermore, in terms of chemical structure, preferred examples of the pigment include pigments having a quinacridone skeleton (hereinafter referred to as quinacridone pigments), pigments having an azo group (hereinafter referred to as azo pigments), pigments having a phthalocyanine skeleton (hereinafter referred to as phthalocyanine pigments), and pigments having an isoindoline skeleton (hereinafter referred to as isoindoline pigments). It is preferable for the pigment to contain at least a quinacridone pigment, more preferably to contain at least a quinacridone pigment and a phthalocyanine pigment, and even more preferably to contain a quinacridone pigment, a phthalocyanine pigment, an azo pigment, and / or an isoindoline pigment.

[0034] The quinacridone pigment is not particularly limited as long as it has a quinacridone skeleton in the molecule, and conventionally known quinacridone pigments can be used. Specific examples of quinacridone pigments include CI Pigment Red 122, 202, and 209, CI Pigment Violet 19, and CI Pigment Orange 48 and 49. Among these, red pigments having a quinacridone skeleton and violet pigments having a quinacridone skeleton are preferred, with CI Pigment Red 122, 202, and 209 and CI Pigment Violet 19 being more preferred, and CI Pigment Red 202 and CI Pigment Violet 19 being even more preferred. The content of the quinacridone pigment may be 100% by mass, preferably 10 to 98% by mass, more preferably 40 to 90% by mass, even more preferably 55 to 85% by mass, and particularly preferably 60 to 80% by mass, based on 100% by mass of the total pigments contained in the photocurable composition.

[0035] The azo pigment is not particularly limited as long as it has an azo group in the molecule, and conventionally known azo pigments can be used. Note that "pigments having an azo group in the molecule" also include those that become pigments having an azo group due to tautomerism. The azo pigment is preferably a monoazo compound having one azo group in one molecule, or a disazo compound having two azo groups in one molecule, and more preferably a disazo compound. Specific examples of azo pigments include monoazo compounds such as yellow pigments such as CI Pigment Yellow 1, 3, 74, 154, and 165, red pigments such as CI Pigment Red 3, 170, and 269, and brown pigments such as CI Pigment Brown 25; yellow pigments such as CI Pigment Yellow 12, 13, 14, 17, 83, 93, 94, 128, and 180, orange pigments such as CI Pigment Orange 13 and 36, and disazo compounds such as CI Pigment Red 144, 166, and 242. Among these, the azo pigment is preferably a yellow pigment having an azo group in the molecule, more preferably a yellow pigment that is a disazo compound such as CI Pigment Yellow 12, 13, 14, 17, 83, 93, 94, 128, or 180, and even more preferably CI Pigment Yellow 180. The content of the azo pigment is, for example, 0 to 30 mass %, preferably 1 to 20 mass %, and more preferably 5 to 15 mass %, relative to 100 mass % of the total pigments contained in the photocurable composition.

[0036] The isoindoline pigment is not particularly limited as long as it has an isoindoline skeleton in the molecule, and conventionally known isoindoline pigments can be used. Specific examples of isoindoline pigments include CI Pigment Yellow 139 and 185. Among these, yellow pigments having an isoindoline skeleton are preferred, and CI Pigment Yellow 139 is more preferred. The content of the isoindoline pigment is, for example, 0 to 30 mass%, preferably 1 to 20 mass%, and more preferably 5 to 15 mass%, based on 100 mass% of the total pigments contained in the photocurable composition. It is also preferable to adjust the total content of the isoindoline pigment and the azo pigment within the above range.

[0037] The phthalocyanine pigment is not particularly limited as long as it has a phthalocyanine skeleton in the molecule, and conventionally known phthalocyanine pigments can be used. Specific examples of phthalocyanine pigments include green pigments such as CI Pigment Green 7, 36, 58, and 59; compounds described in JP-A Nos. 2013-79301, 2013-87251, and WO 2022 / 024926; and blue pigments such as CI Pigment Blue 15, 15:3, 15:4, 15:6, and 16. Among these, blue pigments having a phthalocyanine skeleton are preferred, and blue pigments having a copper phthalocyanine structure such as CI Pigment Blue 15, 15:3, 15:4, and 15:6 are more preferred, with CI Pigment Blue 15:6 being even more preferred. The content of the phthalocyanine pigment is preferably 1 to 40 mass %, more preferably 5 to 35 mass %, and even more preferably 10 to 30 mass %, relative to 100 mass % of the total pigments contained in the photocurable composition.

[0038] The total content of the quinacridone pigment, the azo pigment, the isoindoline pigment, and the phthalocyanine pigment is preferably 40% by mass or more, more preferably 70% by mass or more, and even more preferably 90% by mass or more, relative to 100% by mass of the total pigments contained in the photocurable composition. The total content of the azo pigment and the isoindoline pigment relative to 100 parts by mass of the quinacridone pigment is, for example, 0 to 80 parts by mass, preferably 1 to 50 parts by mass, more preferably 5 to 40 parts by mass, and even more preferably 10 to 30 parts by mass. The content of the phthalocyanine pigment relative to 100 parts by mass of the quinacridone pigment is preferably 1 to 80 parts by mass, more preferably 10 to 50 parts by mass, and even more preferably 20 to 35 parts by mass.

[0039] The pigment may be subjected, as necessary, to a rosin treatment, a surface treatment using a pigment derivative into which an acidic or basic group has been introduced, a grafting treatment onto the pigment surface using a polymer compound, an atomization treatment using a sulfuric acid atomization method, a washing treatment using an organic solvent or water to remove impurities, a treatment to remove ionic impurities using an ion exchange method, etc. It is preferable that the particle size of the pigment is approximately uniform.

[0040] Examples of the dye include, but are not limited to, compounds classified as compounds having a hue other than pigments in the Color Index (published by The Society of Dyers and Colourists) and known dyes described in Dyeing Notes (Shikisensha).

[0041] Examples of dyes include azo dyes, metal complex dyes, cyanine dyes, triphenylmethane dyes, xanthene dyes, thiazole dyes, oxazine dyes, quinophthalone dyes, anthraquinone dyes, naphthoquinone dyes, quinoneimine dyes, methine dyes, azomethine dyes, squarylium dyes, acridine dyes, styryl dyes, coumarin dyes, quinoline dyes, nitro dyes, and phthalocyanine dyes. Of these, organic solvent-soluble dyes are preferred.

[0042] Specific examples of dyes include CI Solvent Yellow 4 (hereinafter, the term CI Solvent Yellow will be omitted and only the numbers will be used. The same applies to the other dyes.), 14, 15, 23, 24, 25, 38, 62, 63, 68, 79, 81, 82, 83, 89, 94, 98, 99, 117, 162, 163, 167, and 189; CI Solvent Red 24, 45, 49, 90, 91, 111, 118, 119, 122, 124, 125, 127, 130, 132, 143, 145, 146, 150, 151, 155, 160, 168, 169, 172, 175, 181, 207, 218, 222, 227, 230, 245, 247; CI Solvent Orange 2, 7, 11, 15, 26, 41, 54, 56, 77, 86, 99; CI Solvent Violet 11, 13, 14, 26, 31, 36, 37, 38, 45, 47, 48, 51, 59, 60; 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; CI solvent dyes such as CI Solvent Green 1, 3, 4, 5, 7, 28, 29, 32, 33, 34, 35; 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, 157, 160, 161, 163, 168, 169, 172, 177, 178, 179, 184, 190, 193, 196, 197, 199, 202, 203, 204, 205, 207, 212, 214, 220, 221, 228, 230, 232, 235, 238, 240, 242, 243, 251; 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, 177, 178, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 23 82, 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; 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; CI Acid Violet 6B, 7, 9, 15, 16, 17, 19, 21, 23, 24, 25, 30, 34, 38, 49, 72, 102; 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 , 126, 127, 129, 130, 131, 138, 140, 142, 143, 147, 150, 151, 154, 158, 161, 166, 167, 168, 170, 171, 175, 182, 183, 184, 187, 192, 199, 203, 204, 205, 210, 213, 229, 234, 236, 242, 243, 249, 256, 259, 267, 269, 278, 280, 285, 290, 296, 315, 324:1, 335, 340; CI Acid dyes such as 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; 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; 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; CI Direct Orange 26, 34, 39, 41, 46, 50, 52, 56, 57, 61, 64, 65, 68, 70, 96, 97, 106, 107; CI Direct Violet 47, 52, 54, 59, 60, 65, 66, 79, 80, 81, 82, 84, 89, 90, 93, 95, 96, 103, 104; 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 6, 167, 168, 170, 171, 172, 173, 188, 189, 190, 192, 193, 194, 195, 196, 198, 199, 200, 201, 202, 203, 207, 209, 210, 212, 213, 214, 222, 225, 226, 228, 229, 236, 237, 238, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 256, 257, 259, 260, 268, 274, 275, 293; CI Direct Dyes, such as CI Direct Green 25, 27, 31, 32, 34, 37, 63, 65, 66, 67, 68, 69, 72, 79, 82; CI Disperse Yellow 51, 54, 76; CI Disperse Violet 26, 27; CI Disperse dyes such as CI Disperse Blue 1, 14, 56, 60, etc. CI Basic Red 1, 9, 10; 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; CI Basic Violet 2; CI Basic dyes, such as CI Basic Green 1; CI Reactive Yellow 2, 76, 116; CI Reactive Orange 16; CI Reactive dyes, such as CI Reactive Red 36; CI Mordant Yellow 5, 8, 10, 16, 20, 26, 30, 31, 33, 42, 43, 45, 56, 61, 62, 65; CI Mordant Red 1, 2, 3, 4, 9, 11, 12, 14, 17, 18, 19, 22, 23, 24, 25, 26, 27, 29, 30, 32, 33, 36, 37, 38, 39, 41, 42, 43, 45, 46, 48, 52, 53, 56, 62, 63, 71, 74, 76, 78, 85, 86, 88, 90, 94, 95; CI Mordant Orange 3, 4, 5, 8, 12, 13, 14, 20, 21, 23, 24, 28, 29, 32, 34, 35, 36, 37, 42, 43, 47, 48; CI Mordant Violet 1, 1:1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 27, 28, 30, 31, 32, 33, 36, 37, 39, 40, 41, 44, 45, 47, 48, 49, 53, 58; CI Mordant Blue 1, 2, 3, 7, 8, 9, 12, 13, 15, 16, 19, 20, 21, 22, 23, 24, 26, 30, 31, 32, 39, 40, 41, 43, 44, 48, 49, 53, 61, 74, 77, 83, 84; CI Mordant dyes, such as CI Mordant Green 1, 3, 4, 5, 10, 13, 15, 19, 21, 23, 26, 29, 31, 33, 34, 35, 41, 43, 53; Examples include CI Vat dyes such as CI Vat Green 1;

[0043] As the dye, a dye whose absorption spectrum has a maximum absorption wavelength in the wavelength region of 410 nm or less (preferably 380 to 410 nm) (hereinafter referred to as dye a1), a dye whose absorption spectrum has a maximum absorption wavelength in the wavelength region of 480 to 510 nm (hereinafter referred to as dye a2), a dye whose absorption spectrum has a maximum absorption wavelength in the wavelength region of 535 to 580 nm (hereinafter referred to as dye a3), etc. can also be used. The maximum absorption wavelength can be determined by dissolving the dye in chloroform at a concentration of 1×10 -6The concentration can be determined by preparing a solution of 100 mol / L and measuring the solution using an ultraviolet-visible spectrophotometer. Examples of the dye a1 include FDB-009 (manufactured by Yamada Chemical Co., Ltd.), and among these, FDB-009 is preferred. Examples of the dye a2 include FDB-007 (manufactured by Yamada Chemical Industry Co., Ltd.) and FDB-022 (manufactured by Yamada Chemical Industry Co., Ltd.), and among these, FDB-022 is preferred. Examples of the dye a3 include CI Solvent Red 119, 125, and 160.

[0044] The total content of the dye a1, the dye a2, and the dye a3 is preferably 40% by mass or more, more preferably 70% by mass or more, and even more preferably 90% by mass or more, based on 100% by mass of the total amount of dyes contained in the photocurable composition, and may be 100% by mass.

[0045] As the dye, it is preferable to use dye a1 and / or dye a2, and it is more preferable to use dye a1 and dye a2 in combination. The total content of dye a1 and dye a2 is preferably 40% by mass or more, more preferably 55% by mass or more, and may be 80% by mass or more, or 90% by mass or more, based on 100% by mass of the total dyes contained in the photocurable composition. When the photocurable composition contains both the dye a1 and the dye a2, the content of the dye a2 is preferably 10 to 150 parts by mass, more preferably 30 to 100 parts by mass, and even more preferably 40 to 70 parts by mass, per 100 parts by mass of the dye a1.

[0046] The above dyes may be used alone or in combination of two or more.

[0047] The content of the colorant (A) in the photocurable composition is preferably 0.5 to 80 mass %, more preferably 1 to 50 mass %, even more preferably 3 to 30 mass %, and particularly preferably 5 to 20 mass %, based on the total amount of solids. When the content of the colorant (A) is within the above range, it becomes easier to obtain the desired absorption spectrum. In this specification, the term "total amount of solids" refers to the total amount of components in the photocurable composition excluding the solvent. The total amount of solids and the content of each component relative to the total amount of solids can be measured by known analytical means such as liquid chromatography or gas chromatography.

[0048] <Alkali-soluble resin (B)> As described above, the color filter of the present invention does not require patterning corresponding to each of the red, blue, and green light-emitting sections, but it is desirable that patterning can be easily performed to remove unnecessary areas such as spaces used for bonding pads. In this regard, the photocurable composition is preferable because it contains an alkali-soluble resin (B), which enables patterning by photolithography and allows patterns to be easily formed according to the required range.

[0049] The alkali-soluble resin (B) is preferably at least one selected from the group consisting of the following resins [K1] to [K6]. Resin [K1]: a copolymer having structural units derived from at least one monomer (a) (hereinafter sometimes referred to as "(a)") selected from the group consisting of unsaturated carboxylic acids and unsaturated carboxylic acid anhydrides, and structural units derived from a monomer (b) (hereinafter sometimes referred to as "(b)") having a cyclic ether structure having 2 to 4 carbon atoms and an ethylenically unsaturated bond; Resin [K2]: a copolymer having structural units derived from (a), structural units derived from (b), and structural units derived from a monomer (c) copolymerizable with (a) (however, different from (a) and (b)) (hereinafter, sometimes referred to as "(c)"); Resin [K3]: a copolymer having structural units derived from (a) and structural units derived from (c); Resin [K4]: a copolymer having a structural unit derived from (a) to which (b) has been added and a structural unit derived from (c), and which contains a structural unit derived from (a) to which (b) has not been added; Resin [K5]: a copolymer having structural units derived from (b) to which (a) has been added and structural units derived from (c) (which may contain, but preferably does not contain, structural units derived from (b) to which (a) has not been added); Resin [K6]: A copolymer having a structural unit obtained by adding the (a) to a structural unit derived from the (b) and further adding a carboxylic acid anhydride, and a structural unit derived from the (c).

[0050] Specific examples of (a) include unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, o-, m-, and p-vinylbenzoic acid; Unsaturated dicarboxylic acids such as maleic acid, fumaric acid, citraconic acid, mesaconic acid, itaconic acid, 3-vinylphthalic acid, 4-vinylphthalic acid, 3,4,5,6-tetrahydrophthalic acid, 1,2,3,6-tetrahydrophthalic acid, dimethyltetrahydrophthalic acid, and 1,4-cyclohexenedicarboxylic acid; bicyclounsaturated compounds containing a carboxy group, such as methyl-5-norbornene-2,3-dicarboxylic acid, 5-carboxybicyclo[2.2.1]hept-2-ene, 5,6-dicarboxybicyclo[2.2.1]hept-2-ene, 5-carboxy-5-methylbicyclo[2.2.1]hept-2-ene, 5-carboxy-5-ethylbicyclo[2.2.1]hept-2-ene, 5-carboxy-6-methylbicyclo[2.2.1]hept-2-ene, and 5-carboxy-6-ethylbicyclo[2.2.1]hept-2-ene; unsaturated dicarboxylic acid anhydrides such as maleic anhydride, citraconic anhydride, itaconic anhydride, 3-vinylphthalic anhydride, 4-vinylphthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, and 5,6-dicarboxybicyclo[2.2.1]hept-2-ene anhydride; Unsaturated mono[(meth)acryloyloxyalkyl] esters of divalent or higher polyvalent carboxylic acids, such as mono[2-(meth)acryloyloxyethyl] succinate and mono[2-(meth)acryloyloxyethyl] phthalate; Examples include unsaturated acrylates containing a hydroxy group and a carboxy group in the same molecule, such as α-(hydroxymethyl)acrylic acid. Among these, acrylic acid, methacrylic acid, maleic anhydride, etc. are preferred from the viewpoint of copolymerization reactivity and solubility of the resulting resin in an alkaline aqueous solution.

[0051] (b) refers to, for example, a polymerizable compound having a cyclic ether structure having 2 to 4 carbon atoms (for example, at least one selected from the group consisting of an oxirane ring, an oxetane ring, and a tetrahydrofuran ring) and an ethylenically unsaturated bond. (b) is preferably a monomer having a cyclic ether having 2 to 4 carbon atoms and a (meth)acryloyloxy group. In this specification, "(meth)acrylic acid" refers to at least one selected from the group consisting of acrylic acid and methacrylic acid. The terms "(meth)acryloyl" and "(meth)acrylate" also have the same meaning.

[0052] Examples of (b) include a monomer (b1) having an oxiranyl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "(b1)"), a monomer (b2) having an oxetanyl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "(b2)"), and a monomer (b3) having a tetrahydrofuryl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "(b3)").

[0053] Examples of (b1) include a monomer (b1-1) (hereinafter sometimes referred to as "(b1-1)") having a structure in which a linear or branched aliphatic unsaturated hydrocarbon has been epoxidized, and a monomer (b1-2) (hereinafter sometimes referred to as "(b1-2)") having a structure in which an alicyclic unsaturated hydrocarbon has been epoxidized.

[0054] Examples of (b1-1) include glycidyl (meth)acrylate, β-methylglycidyl (meth)acrylate, β-ethylglycidyl (meth)acrylate, glycidyl vinyl ether, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl ether, p-vinylbenzyl glycidyl ether, α-methyl-o-vinylbenzyl glycidyl ether, α-methyl-m-vinylbenzyl glycidyl ether, α-methyl-p-vinylbenzyl glycidyl ether, 2,3-bis(glycidyl Examples of such styrene include 2,4-bis(glycidyloxymethyl)styrene, 2,5-bis(glycidyloxymethyl)styrene, 2,6-bis(glycidyloxymethyl)styrene, 2,3,4-tris(glycidyloxymethyl)styrene, 2,3,5-tris(glycidyloxymethyl)styrene, 2,3,6-tris(glycidyloxymethyl)styrene, 3,4,5-tris(glycidyloxymethyl)styrene, and 2,4,6-tris(glycidyloxymethyl)styrene.

[0055] Examples of (b1-2) include vinylcyclohexene monoxide, 1,2-epoxy-4-vinylcyclohexane (e.g., Celloxide 2000; manufactured by Daicel Corporation), 3,4-epoxycyclohexylmethyl (meth)acrylate (e.g., Cyclomer A400; manufactured by Daicel Corporation), 3,4-epoxycyclohexylmethyl (meth)acrylate (e.g., Cyclomer M100; manufactured by Daicel Corporation), compounds represented by formula (BI), and compounds represented by formula (BII).

[0056] [ka]

[0057] [In formula (BI) and formula (BII), R e and R f represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and the hydrogen atom contained in the alkyl group may be substituted with a hydroxy group. X e and X fis a single bond, *-R g -, *-R g -O-, *-R g -S- or *-R g represents -NH-. R g represents an alkanediyl group having 1 to 6 carbon atoms. * represents a bond to O.]

[0058] Examples of the alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, and a tert-butyl group. Examples of alkyl groups in which a hydrogen atom is substituted with a hydroxy group include a hydroxymethyl group, a 1-hydroxyethyl group, a 2-hydroxyethyl group, a 1-hydroxypropyl group, a 2-hydroxypropyl group, a 3-hydroxypropyl group, a 1-hydroxy-1-methylethyl group, a 2-hydroxy-1-methylethyl group, a 1-hydroxybutyl group, a 2-hydroxybutyl group, a 3-hydroxybutyl group, and a 4-hydroxybutyl group. R e and R f Preferred examples of the alkyl group include a hydrogen atom, a methyl group, a hydroxymethyl group, a 1-hydroxyethyl group, and a 2-hydroxyethyl group, and more preferred examples include a hydrogen atom and a methyl group.

[0059] Examples of the alkanediyl group include a methylene group, an ethylene group, a propane-1,2-diyl group, a propane-1,3-diyl group, a butane-1,4-diyl group, a pentane-1,5-diyl group, and a hexane-1,6-diyl group. X e and X f Preferred examples of the group include a single bond, a methylene group, an ethylene group, *-CH2-O-, and *-CH2CH2-O-, and more preferred examples include a single bond and *-CH2CH2-O- (* represents a bond to O).

[0060] Examples of compounds represented by formula (BI) include compounds represented by any of formulas (BI-1) to (BI-15). Among these, compounds represented by formula (BI-1), (BI-3), (BII-5), (BI-7), (BI-9) or (BI-11) to (BI-15) are preferred, and compounds represented by formula (BI-1), (BI-7), (BI-9) or (BI-15) are more preferred.

[0061] [ka]

[0062] Examples of the compound represented by formula (BII) include compounds represented by any of formulas (BII-1) to (BII-15). Among these, compounds represented by formula (BII-1), (BII-3), (BII-5), (BII-7), (BII-9) or (BII-11) to (BII-15) are preferred, and compounds represented by formula (BII-1), (BII-7), (BII-9) or (BII-15) are more preferred.

[0063] [ka]

[0064] The compound represented by formula (BI) and the compound represented by formula (BII) may be used alone or in combination of two or more. When the compound represented by formula (BI) and the compound represented by formula (BII) are used in combination, the content ratio thereof [compound represented by formula (BI) : compound represented by formula (BII)] is preferably 5:95 to 95:5, more preferably 20:80 to 80:20 on a molar basis.

[0065] As (b2), a monomer having an oxetanyl group and a (meth)acryloyloxy group is more preferred. Examples of (b2) include 3-methyl-3-methacryloyloxymethyloxetane, 3-methyl-3-acryloyloxymethyloxetane, 3-ethyl-3-methacryloyloxymethyloxetane, 3-ethyl-3-acryloyloxymethyloxetane, 3-methyl-3-methacryloyloxyethyloxetane, 3-methyl-3-acryloyloxyethyloxetane, 3-ethyl-3-methacryloyloxyethyloxetane, 3-ethyl-3-acryloyloxyethyloxetane, and the like.

[0066] As (b3), a monomer having a tetrahydrofuryl group and a (meth)acryloyloxy group is more preferred. Specific examples of (b3) include tetrahydrofurfuryl acrylate (for example, Viscoat V#150, manufactured by Osaka Organic Chemical Industry Co., Ltd.) and tetrahydrofurfuryl methacrylate.

[0067] As (b), (b1) is preferred in that it can further increase the reliability of the color filter in terms of heat resistance, chemical resistance, etc. Furthermore, (b1-2) is more preferred in that it provides excellent storage stability to the photocurable composition.

[0068] Examples of (c) include (meth)acrylic acid ester monomers, unsaturated carboxylic acid esters such as unsaturated dicarboxylic acid esters, and vinyl monomers having an unsaturated aliphatic hydrocarbon ring, an unsaturated heterocyclic ring, or an aromatic ring.

[0069] Examples of the (meth)acrylic acid ester monomer include (meth)acrylic acid esters having a linear or branched aliphatic saturated hydrocarbon group, such as methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, sec-butyl (meth)acrylate, tert-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, dodecyl (meth)acrylate, lauryl (meth)acrylate, and stearyl (meth)acrylate; (meth)acrylic acid esters having a linear or branched aliphatic unsaturated hydrocarbon group, such as allyl (meth)acrylate and propargyl (meth)acrylate; Cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-methylcyclohexyl (meth)acrylate, tricyclo[5.2.1.0 2,6 (meth)acrylic acid esters having a cyclic saturated aliphatic hydrocarbon group, such as decan-8-yl (meth)acrylate (commonly known in the technical field as "dicyclopentanyl (meth)acrylate" and sometimes called "tricyclodecyl (meth)acrylate"), isobornyl (meth)acrylate, and adamantyl (meth)acrylate; Tricyclo[5.2.1.0 2,6 (meth)acrylic acid esters having a cyclic unsaturated aliphatic hydrocarbon group, such as decene-8-yl (meth)acrylate (commonly known as "dicyclopentenyl (meth)acrylate" in the technical field), and dicyclopentanyloxyethyl (meth)acrylate; (meth)acrylic acid esters having an aromatic ring, such as phenyl (meth)acrylate, naphthyl (meth)acrylate, benzyl (meth)acrylate, and phenoxybenzyl (meth)acrylate; hydroxy group-containing (meth)acrylic acid esters such as 2-hydroxyethyl (meth)acrylate and 2-hydroxypropyl (meth)acrylate; Active methylene group-containing (meth)acrylic acid esters such as compounds represented by the following formula (c-1); and the like.

[0070] [ka] [In formula (c-1), R c1 represents a hydrogen atom or a methyl group, and R c2 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.]

[0071] R c2The alkyl group is preferably an alkyl group having 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group, an ethyl group, or an n-propyl group.

[0072] Examples of unsaturated dicarboxylic acid esters include unsaturated dicarboxylic acid di-C esters such as diethyl maleate, diethyl fumarate, and diethyl itaconate. 1-4 Alkyl esters and the like.

[0073] Among these unsaturated carboxylic acid esters, active methylene group-containing (meth)acrylic acid esters are preferred, the compound represented by formula (c-1) is more preferred, and 2-(acetoacetoxy)ethyl (meth)acrylate is even more preferred.

[0074] Vinyl monomers having an unsaturated aliphatic hydrocarbon ring include bicyclo[2.2.1]hept-2-ene (also called 2-norbornene), 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'-hydroxy ethyl)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- Dimethoxybicyclo[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, 5,6-bis(cyclohexyloxycarbonyl)bicyclo[2.2.1]hept-2-ene, and other bicyclounsaturated compounds.

[0075] Examples of vinyl monomers having an unsaturated heterocycle include dicarbonyl imide derivatives such as N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, N-succinimidyl-3-maleimidobenzoate, N-succinimidyl-4-maleimidobutyrate, N-succinimidyl-6-maleimidocaproate, N-succinimidyl-3-maleimidopropionate, and N-(9-acridinyl)maleimide.

[0076] Examples of vinyl monomers having an aromatic ring include styrene-based monomers such as styrene, α-methylstyrene, m-methylstyrene, p-methylstyrene, vinyltoluene, and p-methoxystyrene.

[0077] Other vinyl monomers include nitrile group-containing monomers such as acrylonitrile and methacrylonitrile; Halogen atom-containing monomers such as vinyl chloride and vinylidene chloride; Examples include acrylamide, methacrylamide, vinyl acetate, 1,3-butadiene, isoprene, and 2,3-dimethyl-1,3-butadiene.

[0078] Among these vinyl monomers, from the viewpoints of copolymerization reactivity and heat resistance, styrene-based monomers such as styrene and vinyltoluene, dicarbonyl imide derivatives such as N-phenylmaleimide, N-cyclohexylmaleimide and N-benzylmaleimide, and bicyclounsaturated compounds such as bicyclo[2.2.1]hept-2-ene are preferred.

[0079] The structural unit obtained by adding (b) to a structural unit derived from (a) refers to a unit formed by adding (b) to a structural unit derived from (a) that constitutes the main chain of the copolymer, and has a pendant unsaturated group derived from (b). In this structural unit, (a) may be any of the above-mentioned examples, and (b) may also be any of the above-mentioned examples. As (a), an unsaturated monocarboxylic acid such as (meth)acrylic acid is preferred. As (b), a monomer (b1) having an oxiranyl group and an ethylenically unsaturated bond is preferred, and a monomer (b1-2) having a structure in which an alicyclic unsaturated hydrocarbon is epoxidized is more preferred.

[0080] The structural unit obtained by adding (a) to a structural unit derived from (b) refers to a unit formed by adding (a) to a structural unit derived from (b) that constitutes the main chain of the copolymer, and has a pendant unsaturated group derived from (a). In this structural unit, (b) may be any of the above-mentioned examples, and (a) may also be any of the above-mentioned examples. As (b), a monomer (b1) having an oxiranyl group and an ethylenically unsaturated bond is preferred, and a monomer (b1-1) having a structure in which a linear or branched aliphatic unsaturated hydrocarbon is epoxidized is more preferred. As (a), an unsaturated monocarboxylic acid such as (meth)acrylic acid is preferred.

[0081] A structural unit obtained by adding (a) to a structural unit derived from (b) and then further adding a carboxylic acid anhydride refers to a structural unit in which (a) is added to a structural unit derived from (b) constituting the main chain of the copolymer, resulting in the formation of a hydroxyl group, to which a carboxylic acid anhydride is attached through half-esterification. This structural unit has a pendant carboxy group derived from the carboxylic acid anhydride and a pendant unsaturated group derived from (a). In this structural unit, (b) may be any of the above-mentioned examples, and (a) may also be any of the above-mentioned examples. As (b), a monomer (b1) having an oxiranyl group and an ethylenically unsaturated bond is preferred, and a monomer (b1-1) having a structure in which a linear or branched aliphatic unsaturated hydrocarbon is epoxidized is more preferred. As (a), an unsaturated monocarboxylic acid such as (meth)acrylic acid is preferred. Examples of carboxylic acid anhydrides include saturated aliphatic polycarboxylic acid anhydrides such as malonic anhydride, succinic anhydride, glutaric anhydride, and adipic anhydride; unsaturated aliphatic polycarboxylic acid anhydrides such as maleic anhydride, citraconic anhydride, and itaconic anhydride; aromatic polycarboxylic acid anhydrides such as 3-vinylphthalic anhydride and 4-vinylphthalic anhydride; and alicyclic polycarboxylic acid anhydrides such as 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, and 5,6-dicarboxybicyclo[2.2.1]hept-2-ene anhydride.

[0082] In the resin [K1], the ratio of the structural units derived from each of these is as follows: Structural units derived from (a): 2 to 60 mol% Structural units derived from (b): 40 to 98 mol% It is preferred that Structural units derived from (a): 10 to 50 mol% Structural units derived from (b): 50 to 90 mol% It is more preferable that: It is also preferable that the structural unit derived from (c) is not substantially contained. The total of the structural units derived from (a) and the structural units derived from (b) is, for example, 90 mol% or more, preferably 95 mol% or more, more preferably 98 mol% or more, and particularly preferably 100 mol% of all the structural units constituting the resin [K1]. When the ratio of the structural units of the resin [K1] is within the above range, the storage stability of the photocurable composition, the developability when forming a pattern, and the solvent resistance of the resulting color filter tend to be excellent.

[0083] Resin [K1] can be produced, for example, by the method described in the literature "Experimental Methods of Polymer Synthesis" (written by Takayuki Otsu, published by Kagaku Dojin Co., Ltd., 1st edition, 1st printing, published March 1, 1972) and by reference to the references described in said literature.

[0084] Specifically, a method can be used in which predetermined amounts of (a) and (b), a polymerization initiator, a solvent, etc. are placed in a reaction vessel, and the mixture is heated and kept warm while stirring. If necessary, the reaction can be carried out in a deoxygenated atmosphere by replacing oxygen with nitrogen. The polymerization initiator, solvent, etc. used here are not particularly limited, and those commonly used in the relevant field can be used. For example, polymerization initiators include azo compounds (2,2'-azobisisobutyronitrile, 2,2'-azobis(2,4-dimethylvaleronitrile), etc.) and organic peroxides (benzoyl peroxide, etc.). The solvent may be any solvent that dissolves each monomer, such as the solvent (E) described below.

[0085] The obtained copolymer may be used as a solution after the reaction as is, or may be a concentrated or diluted solution, or may be extracted as a solid (powder) by a method such as reprecipitation. In particular, by using the solvent contained in the photocurable composition as a solvent during the polymerization, the solution after the reaction can be used as is for preparing the photocurable composition, thereby simplifying the manufacturing process for the color filter of the present invention.

[0086] In the resin [K2], the ratio of the structural units derived from each of these is as follows: Structural units derived from (a): 1 to 70 mol% Structural units derived from (b): 1 to 60 mol% Structural units derived from (c): 20 to 95 mol% It is preferred that Structural units derived from (a): 3 to 50 mol% Structural units derived from (b): 3 to 40 mol% Structural units derived from (c): 30 to 90 mol% It is more preferable that Structural units derived from (a): 5 to 40 mol% Structural units derived from (b): 5 to 30 mol% Structural units derived from (c): 40 to 80 mol% It is even more preferred that: The total of the structural units derived from (a), the structural units derived from (b), and the structural units derived from (c) is, for example, 90 mol% or more, preferably 95 mol% or more, more preferably 98 mol% or more, and particularly preferably 100 mol% of all the structural units constituting the resin [K2]. When the ratio of the structural units of the resin [K2] is within the above range, the photocurable composition tends to have excellent storage stability, developability when forming a pattern, and the color filter tends to have excellent solvent resistance, heat resistance, and mechanical strength.

[0087] In the resin [K2], (a) is preferably an unsaturated monocarboxylic acid such as (meth)acrylic acid. (b) is preferably a monomer (b1) having an oxiranyl group and an ethylenically unsaturated bond, and more preferably a monomer (b1-2) having an epoxidized alicyclic unsaturated hydrocarbon. (c) is preferably a (meth)acrylic acid ester having a cyclic unsaturated aliphatic hydrocarbon group, a (meth)acrylic acid ester having an aromatic ring, or a dicarbonyl imide derivative.

[0088] Resin [K2] can be produced, for example, in the same manner as described above for producing resin [K1].

[0089] In the resin [K3], the ratio of the structural units derived from each of these is as follows: Structural units derived from (a): 2 to 60 mol% Structural units derived from (c): 40 to 98 mol% It is preferred that Structural units derived from (a): 10 to 50 mol% Structural units derived from (c): 50 to 90 mol% It is more preferable that Structural units derived from (a): 30 to 45 mol% Structural units derived from (c): 55 to 70 mol% It is even more preferred that: It is also preferable that the polymer contains substantially no structural units derived from (b). The total of the structural units derived from (a) and the structural units derived from (c) is, for example, 90 mol% or more, preferably 95 mol% or more, more preferably 98 mol% or more, and particularly preferably 100 mol% of all structural units constituting the resin [K3].

[0090] In the resin [K3], (a) is preferably an unsaturated monocarboxylic acid such as (meth)acrylic acid, and (c) is preferably a (meth)acrylic acid ester having an aromatic ring. Resin [K3] can be produced, for example, in the same manner as described above for producing resin [K1].

[0091] In the resin [K4], the ratio of the structural units derived from each of these is as follows: Structural units derived from (a) (without addition of (b)): 1 to 60 mol% Structural units in which (b) is added to structural units derived from (a): 1 to 50 mol% Structural units derived from (c): 30 to 90 mol% It is preferred that Structural units derived from (a) (without addition of (b)): 5 to 50 mol% Structural units in which (b) is added to structural units derived from (a): 5 to 40 mol% Structural units derived from (c): 35 to 80 mol% It is more preferable that Structural units derived from (a) (without addition of (b)): 10 to 40 mol% Structural units in which (b) is added to structural units derived from (a): 10 to 25 mol% Structural units derived from (c): 40 to 75 mol% It is even more preferred that: The total of the structural units derived from (a) (without the addition of (b)), the structural units derived from (a) with the addition of (b), and the structural units derived from (c) is, for example, 90 mol% or more, preferably 95 mol% or more, more preferably 98 mol% or more, and particularly preferably 100 mol% of all the structural units constituting the resin [K4].

[0092] The structural unit derived from (a) (without the addition of (b)) is preferably a structural unit derived from an unsaturated monocarboxylic acid such as (meth)acrylic acid. The structural unit obtained by adding (b) to a structural unit derived from (a) is preferably a structural unit obtained by adding a monomer (b1-2) having an epoxidized alicyclic unsaturated hydrocarbon to a structural unit derived from an unsaturated monocarboxylic acid such as (meth)acrylic acid. The structural unit derived from (c) is preferably one or more selected from active methylene group-containing (meth)acrylic acid esters, bicyclo unsaturated compounds, and styrene-based monomers, more preferably two or more. When (c) has two structural units derived from (c), it is preferable to select at least one from active methylene group-containing (meth)acrylic acid esters and at least one from bicyclo unsaturated compounds and vinyl monomers such as styrene-based monomers, and more preferably at least one from compounds represented by formula (c-1) and at least one from styrene-based monomers.

[0093] Resin [K4] can be produced by obtaining a copolymer of (a) and (c), and then adding the cyclic ether having 2 to 4 carbon atoms contained in (b) to the carboxylic acid and / or carboxylic acid anhydride contained in (a). First, a copolymer of (a) and (c) is produced in the same manner as described for the production of resin [K1]. In this case, the ratio of the structural units derived from each is preferably the same as that described for resin [K3].

[0094] Next, a part of the carboxylic acid and / or carboxylic acid anhydride derived from (a) in the copolymer is reacted with a cyclic ether having 2 to 4 carbon atoms contained in (b). Following the production of the copolymer of (a) and (c), the atmosphere in the flask is replaced with air from nitrogen as needed, and (b), a reaction catalyst for the reaction of a carboxylic acid or a carboxylic acid anhydride with a cyclic ether (e.g., tris(dimethylaminomethyl)phenol, triphenylphosphine, etc.), a polymerization inhibitor (e.g., hydroquinone, 4-methoxyphenol, etc.), etc. are placed in the flask, and the reaction is carried out, for example, at 60 to 130°C for 1 to 10 hours, thereby producing the resin [K4]. The amount of (b) used is preferably 5 to 80 mol, more preferably 10 to 75 mol, per 100 mol of (a). By using this amount within this range, the storage stability of the photocurable composition, the developability when forming a pattern, and the balance of the solvent resistance, heat resistance, mechanical strength, and sensitivity of the resulting color filter tend to be good. The amount of the reaction catalyst used is preferably 0.001 to 5 parts by mass per 100 parts by mass of the total of (a), (b), and (c).The amount of the polymerization inhibitor used is preferably 0.001 to 5 parts by mass per 100 parts by mass of the total of (a), (b), and (c). The reaction conditions such as the charging method, reaction temperature and time can be appropriately adjusted in consideration of the production equipment, the amount of heat generated by the polymerization, etc. As with the polymerization conditions, the charging method and reaction temperature can be appropriately adjusted in consideration of the production equipment, the amount of heat generated by the polymerization, etc.

[0095] In the resin [K5], the ratio of structural units derived from each of these is as follows among all structural units constituting the resin [K5]: Structural units derived from (b) (without (a) added): 0 to 30 mol% Structural units in which (a) is added to structural units derived from (b): 5 to 95 mol% Structural units derived from (c): 5 to 95 mol% It is preferred that Structural units derived from (b) (without (a) added): 0 to 10 mol% Structural units obtained by adding (a) to structural units derived from (b): 15 to 90 mol% Structural units derived from (c): 10 to 85 mol% It is more preferable that Structural units derived from (b) (without (a) added): 0 to 5 mol% Structural units in which (a) is added to structural units derived from (b): 20 to 80 mol% Structural units derived from (c): 20 to 80 mol% It is even more preferred that: The total of the structural units derived from (b) (without (a) added), the structural units derived from (b) with (a) added, and the structural units derived from (c) is, for example, 90 mol% or more, preferably 95 mol% or more, more preferably 98 mol% or more, and particularly preferably 100 mol% of all the structural units constituting the resin [K5].

[0096] The structural unit derived from (b) (without (a) added) is preferably a structural unit derived from a monomer (b1-1) having a structure in which a linear or branched aliphatic unsaturated hydrocarbon has been epoxidized. The structural unit in which (a) has been added to a structural unit derived from (b) is preferably a structural unit in which an unsaturated monocarboxylic acid such as (meth)acrylic acid has been added to a structural unit derived from a monomer (b1-1) having a structure in which a linear or branched aliphatic unsaturated hydrocarbon has been epoxidized. The structural unit derived from (c) is preferably one or more selected from (meth)acrylic acid esters having a linear or branched aliphatic saturated hydrocarbon group and (meth)acrylic acid esters having a cyclic saturated hydrocarbon group, more preferably two or more selected from these.

[0097] Resin [K5] is obtained in the first step by the same method as in the production of resin [K1] described above, to obtain a copolymer of (b) and (c). As in the above, the obtained copolymer may be used as a solution after the reaction as is, a concentrated or diluted solution, or a solid (powder) obtained by a method such as reprecipitation. The ratios of the structural units derived from (b) and (c) to the total number of moles of all structural units constituting the copolymer are as follows: Structural units derived from (b): 5 to 95 mol% Structural units derived from (c): 5 to 95 mol% It is preferred that Structural units derived from (b): 10 to 90 mol% Structural units derived from (c): 10 to 90 mol% It is more preferable that:

[0098] Furthermore, under the same conditions as in the production method of resin [K4], resin [K5] can be obtained by reacting the cyclic ether derived from (b) contained in the copolymer of (b) and (c) with the carboxylic acid or carboxylic anhydride contained in (a). The amount of (a) used to react with the copolymer is preferably 5 to 100 moles per 100 moles of (b). Because the reactivity of cyclic ethers is high and unreacted (b) is unlikely to remain, (b1) is preferred as (b) used in resin [K5], and (b1-1) is more preferred.

[0099] In the resin [K6], the ratio of structural units derived from each of these is as follows: Structural units derived from (b) (without (a) added): 0 to 30 mol% Structural units in which (a) is added to structural units derived from (b) (no carboxylic acid anhydride is added); 20 to 85 mol% Structural units obtained by adding (a) to structural units derived from (b) and then adding a carboxylic acid anhydride thereto: 2 to 40 mol% Structural units derived from (c): 10 to 60 mol% It is preferred that Structural units derived from (b) (without (a) added): 0 to 10 mol% Structural units in which (a) is added to structural units derived from (b) (no carboxylic acid anhydride is added); 40 to 80 mol% a structural unit obtained by adding (a) to a structural unit derived from (b) and then adding a carboxylic acid anhydride thereto; 3 to 30 mol% Structural units derived from (c): 15 to 50 mol% It is more preferable that Structural units derived from (b) (without (a) added): 0 to 5 mol% Structural units in which (a) is added to structural units derived from (b) (no carboxylic acid anhydride is added); 50 to 70 mol% Structural units obtained by adding (a) to structural units derived from (b) and then adding a carboxylic acid anhydride thereto: 5 to 20 mol% Structural units derived from (c): 20 to 40 mol% It is even more preferred that:

[0100] The total of the structural units derived from (b) (to which (a) is not added), the structural units in which (a) is added to the structural units derived from (b) (to which carboxylic acid anhydride is not added), the structural units in which (a) is added to the structural units derived from (b) and then a carboxylic acid anhydride is added, and the structural units derived from (c) is, for example, 90 mol% or more, preferably 95 mol% or more, more preferably 98 mol% or more, and particularly preferably 100 mol% of all the structural units constituting the resin [K6].

[0101] As the structural unit derived from (b) (without (a) added), a structural unit derived from a monomer (b1-1) having a structure in which a linear or branched-chain aliphatic unsaturated hydrocarbon has been epoxidized is preferred. As the structural unit in which (a) has been added to a structural unit derived from (b) (without carboxylic acid anhydride added), a structural unit in which an unsaturated monocarboxylic acid such as (meth)acrylic acid has been added to a structural unit derived from a monomer (b1-1) having a structure in which a linear or branched-chain aliphatic unsaturated hydrocarbon has been epoxidized is preferred. As the structural unit in which (a) has been added to a structural unit derived from (b) and a carboxylic acid anhydride has been further added, a structural unit in which an unsaturated monocarboxylic acid such as (meth)acrylic acid has been added to a structural unit derived from a monomer (b1-1) having a structure in which a linear or branched-chain aliphatic unsaturated hydrocarbon has been epoxidized is preferred, The structural unit derived from (c) is preferably one or more types selected from (meth)acrylic acid esters having a linear or branched aliphatic saturated hydrocarbon group and (meth)acrylic acid esters having a cyclic saturated hydrocarbon group, and more preferably two or more types.

[0102] Resin [K6] is obtained in the first step by the same method as in the production of resin [K1] described above, to obtain a copolymer of (b) and (c). As in the above, the obtained copolymer may be used as a solution after the reaction as is, a concentrated or diluted solution, or a solid (powder) obtained by a method such as reprecipitation. The ratios of the structural units derived from (b) and (c) to the total number of moles of all structural units constituting the copolymer are as follows: Structural units derived from (b): 5 to 95 mol% Structural units derived from (c): 5 to 95 mol% It is preferred that Structural units derived from (b): 10 to 90 mol% Structural units derived from (c): 10 to 90 mol% It is more preferable that:

[0103] Furthermore, under the same conditions as in the production of resin [K4], the cyclic ether derived from (b) contained in the copolymer of (b) and (c) is reacted with the carboxylic acid or carboxylic anhydride contained in (a). The amount of (a) used is preferably 80 to 100 moles per 100 moles of (b).

[0104] The hydroxyl group generated by the reaction of the cyclic ether with the carboxylic acid or carboxylic acid anhydride contained in (a) is reacted with the carboxylic acid anhydride. The amount of the carboxylic acid anhydride used is preferably 0.05 to 1 mol, more preferably 0.10 to 0.8 mol, and even more preferably 0.13 to 0.7 mol, per 1 mol of the amount of (a) used (in other words, per 1 mol of the hydroxyl group generated by the use of (a)).

[0105] Specific examples of the alkali-soluble resin (B) include 3,4-epoxycyclohexylmethyl (meth)acrylate / (meth)acrylic acid copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 ] Decyl acrylate / (meth)acrylic acid copolymer and other resins [K1]; Glycidyl (meth)acrylate / benzyl (meth)acrylate / (meth)acrylic acid copolymer, glycidyl (meth)acrylate / styrene / (meth)acrylic acid copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 ] Decyl acrylate / (meth)acrylic acid / N-cyclohexylmaleimide copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 ] Decyl acrylate / (meth)acrylic acid / N-cyclohexylmaleimide / tricyclo[5.2.1.0 2,6 ]decene-8-yl (meth)acrylate copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 ] Decyl acrylate / (meth)acrylic acid / benzyl (meth)acrylate copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 ] Decyl acrylate / (meth)acrylic acid / phenoxybenzyl (meth)acrylate copolymer, 3-methyl-3-(meth)acryloyloxymethyloxetane / (meth)acrylic acid / styrene copolymer, and other resins [K2]; Resins such as benzyl (meth)acrylate / (meth)acrylic acid copolymer, styrene / (meth)acrylic acid copolymer [K3]; Resins in which glycidyl (meth)acrylate has been added to some of the carboxy groups of a benzyl (meth)acrylate / (meth)acrylic acid copolymer, resins in which glycidyl (meth)acrylate has been added to some of the carboxy groups of a tricyclodecyl (meth)acrylate / styrene / (meth)acrylic acid copolymer, resins in which glycidyl (meth)acrylate has been added to some of the carboxy groups of a tricyclodecyl (meth)acrylate / benzyl (meth)acrylate / (meth)acrylic acid copolymer, resins in which glycidyl (meth)acrylate has been added to some of the carboxy groups of a norbornene / vinyltoluene / (meth)acrylic acid copolymer, resins in which glycidyl (meth)acrylate has been added to some of the carboxy groups of a norbornene / styrene / (meth)acrylic acid copolymer, resins in which glycidyl (meth)acrylate has been added to some of the carboxy groups of a vinyltoluene / 2-(acetoacetoxy)ethyl (meth)acrylate / (meth)acrylic acid copolymer, and resins in which 3,4-epoxycyclohexylmethyl (meth)acrylate has been added to some of the carboxy groups of a vinyltoluene / 2-(acetoacetoxy)ethyl (meth)acrylate / (meth)acrylic acid copolymer are Resins such as resins obtained by reacting tricyclodecyl (meth)acrylate / glycidyl (meth)acrylate copolymers with (meth)acrylic acid, and resins obtained by reacting tricyclodecyl (meth)acrylate / styrene / glycidyl (meth)acrylate copolymers with (meth)acrylic acid [K5]; Examples of such resins include a resin obtained by reacting a copolymer of tricyclodecyl (meth)acrylate and glycidyl (meth)acrylate with (meth)acrylic acid and then reacting the resulting resin with tetrahydrophthalic anhydride, a resin obtained by reacting a copolymer of 2-ethylhexyl (meth)acrylate, tricyclodecyl (meth)acrylate and glycidyl (meth)acrylate with (meth)acrylic acid and then reacting the resulting resin with succinic anhydride, and a resin obtained by reacting a copolymer of methyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, tricyclodecyl (meth)acrylate and glycidyl (meth)acrylate with (meth)acrylic acid and then reacting the resulting resin with succinic anhydride [K6].

[0106] The alkali-soluble resin (B) is preferably the resin [K4].

[0107] The weight average molecular weight of the alkali-soluble resin (B) in terms of polystyrene is preferably 3,000 to 100,000, more preferably 5,000 to 50,000, and even more preferably 5,000 to 30,000. When the molecular weight is within the above range, the hardness of the color filter is improved, the residual film rate is high, the solubility of the unexposed areas in the developer is good, and the pattern resolution tends to be improved. The dispersity [weight average molecular weight (Mw) / number average molecular weight (Mn)] of the alkali-soluble resin (B) is preferably 1.1-6, more preferably 1.2-4.

[0108] The acid value of the alkali-soluble resin (B) is preferably 20 to 170 mg-KOH / g, more preferably 25 to 150 mg-KOH / g, even more preferably 30 to 135 mg-KOH / g, and even more preferably 50 to 130 mg-KOH / g, calculated as solid content. The acid value is a value measured as the amount (mg) of potassium hydroxide required to neutralize 1 g of the alkali-soluble resin (B), and can be determined, for example, by titration with an aqueous potassium hydroxide solution.

[0109] The content of the alkali-soluble resin (B) is preferably 2 to 65 mass %, more preferably 5 to 60 mass %, even more preferably 10 to 55 mass %, and still more preferably 20 to 50 mass %, based on the total amount of solids in the photocurable composition. When the content of the alkali-soluble resin (B) is within the above range, it becomes possible to easily pattern the color filter, and the pattern resolution and residual film rate tend to be improved.

[0110] <Polymerizable compound (C)> The polymerizable compound (C) is a compound that can be polymerized by active radicals and / or acids generated from the polymerization initiator (D), and examples thereof include compounds having a polymerizable ethylenically unsaturated bond, and are preferably (meth)acrylic acid ester compounds.

[0111] Among these, the polymerizable compound (C) is preferably a polymerizable compound having three or more ethylenically unsaturated bonds.Examples of such polymerizable compounds include trimethylolpropane tri(meth)acrylate, pentaerythritol poly(meth)acrylate (e.g., pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate), dipentaerythritol poly(meth)acrylate (e.g., dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate), tripentaerythritol poly(meth)acrylate (e.g., tripentaerythritol octa(meth)acrylate), and the like. acrylate, tripentaerythritol hepta(meth)acrylate), tetrapentaerythritol poly(meth)acrylate (e.g., tetrapentaerythritol deca(meth)acrylate, tetrapentaerythritol nona(meth)acrylate), tris(2-(meth)acryloyloxyethyl)isocyanurate, alkoxylated glycerin tri(meth)acrylate (e.g., ethoxylated glycerin tri(meth)acrylate, propoxylated glycerin tri(meth)acrylate), alkoxylated pentaerythritol poly(meth)acrylate acrylates (e.g., ethoxylated pentaerythritol tri(meth)acrylate, ethoxylated pentaerythritol tetra(meth)acrylate, propoxylated pentaerythritol tri(meth)acrylate, propoxylated pentaerythritol tetra(meth)acrylate), alkoxylated dipentaerythritol poly(meth)acrylates (e.g., ethoxylated dipentaerythritol penta(meth)acrylate, ethoxylated dipentaerythritol hexa(meth)acrylate, propoxylated dipentaerythritol penta(meth)acrylate caprolactone-modified pentaerythritol poly(meth)acrylates (e.g., caprolactone-modified pentaerythritol tri(meth)acrylate, caprolactone-modified pentaerythritol tetra(meth)acrylate), caprolactone-modified dipentaerythritol poly(meth)acrylates (e.g., caprolactone-modified dipentaerythritol penta(meth)acrylate, caprolactone-modified dipentaerythritol hexa(meth)acrylate), and the like. Among these, at least one selected from the group consisting of trimethylolpropane tri(meth)acrylate, alkoxylated glycerin tri(meth)acrylate, and dipentaerythritol poly(meth)acrylate is preferred, at least one selected from the group consisting of alkoxylated glycerin tri(meth)acrylate and dipentaerythritol polyacrylate is more preferred, and alkoxylated glycerin tri(meth)acrylate and dipentaerythritol polyacrylate is even more preferred.

[0112] The weight average molecular weight of the polymerizable compound (C) is preferably 150 or more and 2,900 or less, more preferably 250 or more and 1,500 or less.

[0113] The content of the polymerizable compound (C) is preferably 7 to 70 mass %, more preferably 20 to 65 mass %, and even more preferably 40 to 60 mass %, based on the total amount of solids in the photocurable composition. When the content of the polymerizable compound (C) is within the above range, the residual film rate during pattern formation and the chemical resistance of the color filter tend to be further improved.

[0114] <Polymerization initiator (D)> The polymerization initiator (D) is not particularly limited as long as it is a compound that generates active radicals, acids, etc. by the action of light or heat and can initiate polymerization, and known polymerization initiators can be used.

[0115] Examples of polymerization initiators that generate active radicals include alkylphenone compounds, triazine compounds, acylphosphine oxide compounds, O-acyloxime compounds, and biimidazole compounds.

[0116] The O-acyloxime compound is a compound having a partial structure represented by formula (d1): Hereinafter, * represents a bond.

[0117] [ka]

[0118] Examples of the O-acyloxime compound include N-benzoyloxy-1-(4-phenylsulfanylphenyl)butan-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)octan-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)-3-cyclopentylpropan-1-one-2-imine, N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethan-1-imine, N-acetoxy-1-[9-ethyl-6-{2-methyl-4-(3,3-dimethyl-2,4-dioxacyclopentanylmethyloxy)benzoyl}-9H-carbazol-3-yl]ethan-1-imine, N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-3-cyclopentylpropan-1-imine, N-benzoyloxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-3-cyclopentylpropan-1-one-2-imine, N-acetyloxy-1-[4-(2-hydroxyethyloxy)phenylsulfanylphenyl]propan-1-one-2-imine, N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine, 2-[(acetyloxy)imino]-3-cyclohexyl-1-[4-(phenylsulfanyl)phenyl]propan-1-one, and the like. Commercially available products such as Irgacure OXE01, OXE02, and OXE03 (all manufactured by BASF), N-1919 (manufactured by ADEKA), PBG-314, PBG-317, PBG-326, PBG-327, and PBG-329 (all manufactured by Changzhou Strong Electronic New Materials Co., Ltd.) may also be used.Among them, O-acyloxime compounds include N-acetyloxy-1-[4-(2-hydroxyethyloxy)phenylsulfanylphenyl]propan-1-one-2-imine, N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine, 2-[(acetyloxy)imino]-3-cyclohexyl-1-[4-(phenylsulfanyl)phenyl]propan-1-one, N-benzoyloxy-1-(4-phenylsulfanylphenyl)butan-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)octan-1-one-2-imine, and N-benzoyloxy-1-(4-phenylsulfanylphenyl)octan-1-one-2-imine. At least one selected from the group consisting of 2-[(acetyloxy)imino]-3-cyclohexyl-1-[4-(phenylsulfanyl)phenyl]propan-1-one, N-benzoyloxy-1-(4-phenylsulfanylphenyl)octan-1-one-2-imine, and N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine is preferred, and at least one selected from the group consisting of 2-[(acetyloxy)imino]-3-cyclohexyl-1-[4-(phenylsulfanyl)phenyl]propan-1-one, N-benzoyloxy-1-(4-phenylsulfanylphenyl)octan-1-one-2-imine, and N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine is more preferred. These O-acyloxime compounds tend to produce color filters with high brightness.

[0119] The alkylphenone compound is a compound having a partial structure represented by formula (d2) or (d3). In these partial structures, the benzene ring may have a substituent.

[0120] [ka]

[0121] Examples of compounds having a partial structure represented by formula (d2) include 2-methyl-2-morpholino-1-(4-methylsulfanylphenyl)propan-1-one, 2-dimethylamino-1-(4-morpholinophenyl)-2-benzylbutan-1-one, 2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4-morpholinyl)phenyl]butan-1-one, etc. Commercially available products such as Irgacure 369, 907, and 379 (all manufactured by BASF) may also be used.

[0122] Examples of compounds having a partial structure represented by formula (d3) include 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]propan-1-one, 1-hydroxycyclohexyl phenyl ketone, oligomers of 2-hydroxy-2-methyl-1-(4-isopropenylphenyl)propan-1-one, α,α-diethoxyacetophenone, and benzyl dimethyl ketal. In terms of sensitivity, the alkylphenone compound is preferably a compound having a partial structure represented by formula (d2).

[0123] Examples of the triazine compound include 2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxynaphthyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-piperonyl-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxystyryl)-1,3,5-triazine, and 2,4-bis(trichloromethyl)-6-[ 2-(5-methylfuran-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(furan-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino-2-methylphenyl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(3,4-dimethoxyphenyl)ethenyl]-1,3,5-triazine, and the like.

[0124] Examples of the acylphosphine oxide compound include 2,4,6-trimethylbenzoyldiphenylphosphine oxide, etc. Commercially available products such as Irgacure (registered trademark) 819 (manufactured by BASF) may also be used.

[0125] Examples of the biimidazole compound include 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2,3-dichlorophenyl)-4,4',5,5'-tetraphenylbiimidazole (see, for example, JP-A-6-75372 and JP-A-6-75373), 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(alkoxyphenyl) 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(dialkoxyphenyl)biimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(trialkoxyphenyl)biimidazole (see, for example, JP-B-48-38403 and JP-A-62-174204), and biimidazole compounds in which the phenyl groups at the 4,4',5,5'-positions are substituted with carboalkoxy groups (see, for example, JP-A-7-10913).

[0126] Further examples of the polymerization initiator (D) include benzoin compounds such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether; benzophenone compounds such as benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3',4,4'-tetra(tert-butylperoxycarbonyl)benzophenone, and 2,4,6-trimethylbenzophenone; quinone compounds such as 9,10-phenanthrenequinone, 2-ethylanthraquinone, and camphorquinone; 10-butyl-2-chloroacridone, benzyl, methyl phenylglyoxylate, and titanocene compounds. These are preferably used in combination with the polymerization initiator aid (D1) (especially amines) described below.

[0127] Examples of the polymerization initiator that generates an acid include onium salts such as 4-hydroxyphenyldimethylsulfonium p-toluenesulfonate, 4-hydroxyphenyldimethylsulfonium hexafluoroantimonate, 4-acetoxyphenyldimethylsulfonium p-toluenesulfonate, 4-acetoxyphenylmethylbenzylsulfonium hexafluoroantimonate, triphenylsulfonium p-toluenesulfonate, triphenylsulfonium hexafluoroantimonate, diphenyliodonium p-toluenesulfonate, and diphenyliodonium hexafluoroantimonate; nitrobenzyl tosylates; and benzoin tosylates.

[0128] The polymerization initiator (D) is preferably a polymerization initiator containing at least one selected from the group consisting of an alkylphenone compound, a triazine compound, an acylphosphine oxide compound, an O-acyloxime compound, and a biimidazole compound, and more preferably a polymerization initiator containing an O-acyloxime compound.

[0129] The content of the polymerization initiator (D) is preferably 0.1 to 30 parts by mass, more preferably 1 to 20 parts by mass, and even more preferably 2 to 10 parts by mass, relative to 100 parts by mass of the total amount of the alkali-soluble resin (B) and the polymerizable compound (C). When the content of the polymerization initiator (D) is within the above range, sensitivity tends to be increased and exposure time tends to be shortened, thereby improving productivity of the color filter.

[0130] <Polymerization initiator aid (D1)> The polymerization initiation aid (D1) is a compound or sensitizer used to promote the polymerization of a polymerizable compound whose polymerization has been initiated by a polymerization initiator. When the polymerization initiation aid (D1) is contained, it is usually used in combination with the polymerization initiator (D). Examples of the polymerization initiation aid (D1) include amine compounds, alkoxyanthracene compounds, thioxanthone compounds, and carboxylic acid compounds.

[0131] Examples of the amine compound include triethanolamine, methyldiethanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 2-dimethylaminoethyl benzoate, 2-ethylhexyl 4-dimethylaminobenzoate, N,N-dimethyl-p-toluidine, 4,4'-bis(dimethylamino)benzophenone (commonly known as Michler's ketone), 4,4'-bis(diethylamino)benzophenone, and 4,4'-bis(ethylmethylamino)benzophenone, among which 4,4'-bis(diethylamino)benzophenone is preferred. Commercially available products such as EAB-F (manufactured by Hodogaya Chemical Co., Ltd.) may also be used.

[0132] Examples of the alkoxyanthracene compound 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.

[0133] Examples of the thioxanthone compound include 2-isopropylthioxanthone, 4-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, and 1-chloro-4-propoxythioxanthone.

[0134] Examples of the carboxylic acid compound include phenylsulfanylacetic acid, methylphenylsulfanylacetic acid, ethylphenylsulfanylacetic acid, methylethylphenylsulfanylacetic acid, dimethylphenylsulfanylacetic acid, methoxyphenylsulfanylacetic acid, dimethoxyphenylsulfanylacetic acid, chlorophenylsulfanylacetic acid, dichlorophenylsulfanylacetic acid, N-phenylglycine, phenoxyacetic acid, naphthylthioacetic acid, N-naphthylglycine, and naphthoxyacetic acid.

[0135] When these polymerization initiation aids (D1) are used, the content thereof is preferably 0.1 to 30 parts by mass, more preferably 1 to 20 parts by mass, and even more preferably 2 to 10 parts by mass, relative to 100 parts by mass of the total amount of the alkali-soluble resin (B) and the polymerizable compound (C). When the amount of the polymerization initiation aid (D1) is within this range, patterns can be formed with even higher sensitivity, and the productivity of color filters tends to improve.

[0136] <Solvent (E)> The solvent (E) is not particularly limited, and a solvent commonly used in the art can be used. Examples thereof include ester solvents (solvents containing -COO- but not -O- in the molecule), ether solvents (solvents containing -O- but not -COO- in the molecule), ether ester solvents (solvents containing -COO- and -O- in the molecule), ketone solvents (solvents containing -CO- but not -COO- in the molecule), alcohol solvents (solvents containing OH in the molecule but not -O-, -CO-, or -COO-), aromatic hydrocarbon solvents, amide solvents, and dimethyl sulfoxide.

[0137] Examples of ester solvents include methyl lactate, ethyl lactate, butyl lactate, methyl 2-hydroxyisobutanoate, ethyl acetate, n-butyl acetate, isobutyl acetate, pentyl formate, isopentyl acetate, butyl propionate, isopropyl butyrate, ethyl butyrate, butyl butyrate, methyl pyruvate, ethyl pyruvate, propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, cyclohexanol acetate, and γ-butyrolactone.

[0138] Examples of the ether solvent include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, 3-methoxy-1-butanol, 3-methoxy-3-methylbutanol, tetrahydrofuran, tetrahydropyran, 1,4-dioxane, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether, anisole, phenetole, and methylanisole.

[0139] 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, methyl 2-ethoxy ... Examples of the alkyl ether acetate include ethyl 2-methoxy-2-methylpropionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether acetate, and diethylene glycol monobutyl ether acetate.

[0140] 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.

[0141] Examples of alcohol solvents include methanol, ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, propylene glycol, and glycerin.

[0142] Aromatic hydrocarbon solvents include benzene, toluene, xylene, and mesitylene.

[0143] Amide solvents include N,N-dimethylformamide, N,N-dimethylacetamide, and N-methylpyrrolidone.

[0144] Among the above solvents, from the viewpoints of coatability and drying property, organic solvents having a boiling point at 1 atm of 120° C. or more and 180° C. or less are preferred. The solvent is preferably at least one selected from the group consisting of 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, cyclopentanone, and N,N-dimethylformamide, and more preferably at least one selected from the group consisting of propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, 4-hydroxy-4-methyl-2-pentanone, cyclopentanone, ethyl lactate, and ethyl 3-ethoxypropionate.

[0145] The content of the solvent (E) is preferably 50 to 95% by mass, more preferably 60 to 90% by mass, based on the total amount of the photocurable composition. In other words, the solid content of the photocurable composition is preferably 5 to 50% by mass, more preferably 10 to 40% by mass. When the content of the solvent (E) is within the above range, the flatness during coating is good, and the color density is not insufficient when a color filter is formed, so that the display characteristics and sensitivity tend to be good.

[0146] <Leveling Agent (F)> Examples of the leveling agent (F) include silicone surfactants, fluorine surfactants, and silicone surfactants containing fluorine atoms, which may have a polymerizable group in the side chain.

[0147] Examples of silicone surfactants include surfactants having a siloxane bond in the molecule, such as Toray Silicone DC3PA, SH7PA, DC11PA, SH21PA, SH28PA, SH29PA, SH30PA, and SH8400 (trade names: manufactured by Dow Corning Toray Co., Ltd.), KP321, KP322, KP323, KP324, KP326, KP340, and KP341 (manufactured by Shin-Etsu Chemical Co., Ltd.), and TSF400, TSF401, TSF410, TSF4300, TSF4440, TSF4445, TSF4446, TSF4452, and TSF4460 (manufactured by Momentive Performance Materials Japan, LLC).

[0148] Examples of the fluorine-based surfactant include surfactants having a fluorocarbon chain in the molecule, such as Fluorad (registered trademark) FC430 and FC431 (manufactured by Sumitomo 3M Limited), Megafac (registered trademark) F142D, F171, F172, F173, F177, F183, F554, R30, and RS-718-K (manufactured by DIC Corporation), F-Top (registered trademark) EF301, EF303, EF351, and EF352 (manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd.), Surflon (registered trademark) S381, S382, SC101, and SC105 (manufactured by AGC Corporation (formerly Asahi Glass Co., Ltd.)), and E5844 (manufactured by Daikin Fine Chemicals Research Institute, Ltd.).

[0149] Examples of the silicone surfactant having a fluorine atom include surfactants having a siloxane bond and a fluorocarbon chain in the molecule, such as Megafac (registered trademark) R08, BL20, F475, F477, and F443 (manufactured by DIC Corporation).

[0150] The content of the leveling agent (F) is preferably 0.001 to 0.2 mass%, more preferably 0.002 to 0.05 mass%, based on the total amount of the photocurable composition. This content does not include the content of the pigment dispersant described below. When the content of the leveling agent (F) is within the above range, the flatness of the color filter can be improved.

[0151] <Other ingredients> The photocurable composition may contain additives known in the art, such as fillers, other polymer compounds, adhesion promoters, antioxidants, light stabilizers, and chain transfer agents, as needed.

[0152] <Method for producing photocurable composition> The photocurable composition can be prepared, for example, by mixing the colorant (A) and alkali-soluble resin (B), as well as the polymerizable compound (C), polymerization initiator (D), solvent (E), leveling agent (F), polymerization initiator aid (D1), and other components, which are used as needed. The photocurable composition after mixing may be filtered through a filter with a pore size of about 0.01 to 10 μm.

[0153] When a pigment is used as the colorant (A), it may be dispersed using a pigment dispersant to be used as a dispersion in a uniformly dispersed state in a solution. The desired photocurable composition can be prepared by mixing the remaining components with such a dispersion to a predetermined concentration. When two or more pigments are used, each pigment may be dispersed individually, or multiple pigments may be mixed and dispersed.

[0154] Examples of pigment dispersants include surfactants, which may be cationic, anionic, nonionic, or amphoteric. Specific examples include polyester, polyamine, and acrylic surfactants. These dispersants may 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.), FLORENE (manufactured by Kyoeisha Chemical Co., Ltd.), Solsperse (registered trademark) (manufactured by Zeneca Corporation), EFKA (registered trademark) (manufactured by BASF), Ajisper (registered trademark) (manufactured by Ajinomoto Fine-Techno Co., Ltd.), Disperbyk (registered trademark), and BYK (registered trademark) (manufactured by BYK-Chemie).

[0155] When a pigment dispersant is used, the amount used is preferably 1 to 200 parts by mass, more preferably 5 to 120 parts by mass, and even more preferably 10 to 80 parts by mass, relative to 100 parts by mass of the pigment in the dispersion. When the amount of the pigment dispersant used is within the above range, a dispersion in a more uniformly dispersed state tends to be obtained.

[0156] When the colorant (A) contains a dye, the dye may be dissolved in advance in a part or all of the solvent (E) to prepare a solution, which is then preferably filtered through a filter having a pore size of about 0.01 to 1 μm.

[0157] <Color filter manufacturing method> As described above, the color filter of the present invention is composed of a cured product of the photocurable composition described above, i.e., it can be produced by curing the photocurable composition described above. The curing method is not particularly limited, but curing by light is preferred. Specifically, the color filter can be produced by applying the photocurable composition to a substrate, drying the composition to form a composition layer, and exposing the composition layer to light to cure it.

[0158] The substrate may be a glass plate such as quartz glass, borosilicate glass, alumina silicate glass, or silica-coated soda lime glass; a resin plate such as polycarbonate, polymethyl methacrylate, or polyethylene terephthalate; silicon; or a substrate having a thin film of aluminum, silver, or a silver / copper / palladium alloy formed thereon. Another optical filter layer, a resin layer, a transistor, a circuit, or the like may be formed on these substrates. Alternatively, a silicon substrate treated with HMDS may be used.

[0159] Examples of methods for applying the photocurable composition onto a substrate include spin coating, slit coating, and slit and spin coating.

[0160] After coating the photocurable composition on a substrate, the composition can be dried by heating (pre-baking) and / or drying under reduced pressure to remove volatile components such as solvents and obtain a smooth composition layer. When drying by heating, the temperature is preferably 30 to 120°C, more preferably 50 to 110°C. The heating time is preferably 10 seconds to 60 minutes, more preferably 30 seconds to 30 minutes. When drying under reduced pressure, the drying is preferably carried out under a pressure of 50 to 150 Pa at a temperature in the range of 20 to 25°C. The film thickness of the composition layer is not particularly limited and may be selected appropriately depending on the film thickness of the desired color filter.

[0161] Next, the composition layer is exposed to light. The light source used for exposure is preferably a light source that emits light with a wavelength of 250 to 450 nm. For example, light less than 250 nm may be cut using a filter that cuts this wavelength range, or light around 436 nm, 408 nm, or 365 nm may be selectively extracted using a bandpass filter that extracts these wavelength ranges. Specific examples include mercury lamps, light-emitting diodes, metal halide lamps, and halogen lamps. It is preferable to use a reduced projection exposure device or proximity exposure device such as a mask aligner or stepper, as this allows for uniform irradiation of the entire exposure surface with parallel light.

[0162] Furthermore, it is preferable to post-bake the resulting coating film. The post-bake temperature is preferably 70 to 250° C., more preferably 80 to 230° C., and even more preferably 80 to 200° C. The post-bake time is preferably 1 to 120 minutes, and more preferably 2 to 30 minutes.

[0163] As described above, the photocurable composition contains the alkali-soluble resin (B), and therefore can be patterned (developed) by photolithography. Patterning by photolithography can be performed using known or conventional equipment and conditions. Specifically, after obtaining a composition layer by the same method as above, the composition layer can be exposed to light through a photomask to be cured, and then developed.

[0164] The pattern on the photomask is not particularly limited, and a pattern appropriate for the intended use is used. The light source used for exposure is the same as that described above. It is preferable to use a reduced projection exposure device or proximity exposure device such as a mask aligner and a stepper, because it can uniformly irradiate the entire exposure surface with parallel light and accurately align the photomask and substrate.

[0165] A pattern is formed on the substrate by bringing the exposed composition layer into contact with a developer and developing it. The unexposed portions of the composition layer are dissolved and removed by the development. The developer is preferably an aqueous solution of an alkaline compound such as potassium hydroxide, sodium bicarbonate, sodium carbonate, or tetramethylammonium hydroxide. The concentration of these alkaline compounds in the aqueous solution is preferably 0.01 to 10% by mass, more preferably 0.03 to 5% by mass. The developer may also contain a surfactant. The development method may be any of a puddle method, a dipping method, a spray method, or the like. Furthermore, the substrate may be tilted at any angle during development. After development, it is preferable to wash with water.

[0166] Furthermore, it is preferable to perform post-baking on the obtained pattern under the same conditions as above.

[0167] <Display device> The display device of the present invention includes the above-described color filter. The display device of the present invention is preferably an organic EL display device, and is preferably an organic EL display device having light-emitting sections formed by a three-color coating method, i.e., an organic EL display device having a red light-emitting section, a green light-emitting section, and a blue light-emitting section. Conventionally, color filters in such display devices require a red color filter facing the red light-emitting section, a green color filter facing the green light-emitting section, and a blue color filter facing the blue light-emitting section, and high-resolution patterning for each pixel is required for manufacturing the color filters. However, the color filter included in the display device of the present invention has a specific absorption spectrum, and therefore can impart good color purity even when formed as a pattern spanning the red light-emitting section, the green light-emitting section, and the blue light-emitting section, eliminating the need for high-resolution patterning. Furthermore, the color filter included in the display device of the present invention is also preferable in that it has excellent antireflection properties in a preferred embodiment, eliminating the need for a separate antireflection layer.

[0168] An example of the display device of the present invention will be described below, but the display device of the present invention is not limited to this example.

[0169] 1 is a schematic cross-sectional view of a display device 100, which is an example of a display device of the present invention. The display device 100 has a substrate 1, a metal electrode layer 2 disposed on the substrate 1, an organic EL layer 3 disposed on the metal electrode layer 2, a transparent electrode layer 4 disposed on the organic EL layer 3, a color filter 5 disposed on the transparent electrode layer 4, and a transparent substrate 6 disposed on the color filter 5.

[0170] The substrate 1 can be a substrate commonly used in this technical field, and examples thereof include glass plates such as quartz glass, borosilicate glass, alumina silicate glass, and soda lime glass with a silica-coated surface; resin plates such as polycarbonate, polymethyl methacrylate, and polyethylene terephthalate; and silicon.

[0171] The thickness of the substrate 1 may be adjusted appropriately depending on the application of the display device, and is, for example, 0.3 to 1 mm.

[0172] The metal electrode layer 2 is formed on the substrate 1, and more specifically, refers to a metal electrode circuit formed on the substrate 1. The metal electrode layer 2 is provided to apply a voltage to the organic EL layer 3 sandwiched between it and the transparent electrode layer 4 (described below) to cause each color light-emitting section to emit light, and is an electrode layer having an opposite charge to that of the transparent electrode layer 4. In other words, when the metal electrode layer 2 is the anode, the transparent electrode layer 4 is the cathode, and when the metal electrode layer 2 is the cathode, the transparent electrode layer 4 is the anode.

[0173] The material constituting the metal electrode layer 2 may be a metal, alloy, or mixture thereof commonly used in this technical field, and specific examples include a mixture of magnesium and silver, a mixture of magnesium and aluminum, a mixture of magnesium and indium, a mixture of aluminum and aluminum oxide, and a mixture of lithium and aluminum.

[0174] The thickness of the metal electrode layer 2 is not particularly limited, but is usually about 10 nm to 1 μm.

[0175] The organic EL layer 3 is formed on the metal electrode layer 2. In the present invention, the organic EL layer 3 has three color light-emitting sections: a red light-emitting section 3R that emits red light, a green light-emitting section 3G that emits green light, and a blue light-emitting section 3B that emits blue light (hereinafter, the three color light-emitting sections may be collectively referred to as the "light-emitting layer"). The position corresponding to the red light-emitting section 3R is a red pixel 7R, the position corresponding to the green light-emitting section 3G is a green pixel 7G, and the position corresponding to the blue light-emitting section 3B is a blue pixel 7B.

[0176] The light-emitting layers (red light-emitting section 3R, green light-emitting section 3G, and blue light-emitting section 3B) may be light-emitting layers produced by a conventionally known three-color coating method, for example.

[0177] The organic EL layer 3 may be a single-layer organic EL layer consisting of an emissive layer, or a multilayer organic EL layer in which a conventional hole injection layer, hole transport layer, hole blocking layer, electron injection layer, etc. are laminated in addition to the emissive layer for the purposes of facilitating the injection of holes and electrons into the emissive layer and facilitating the recombination of holes and electrons within the emissive layer. Typical layer configurations of multilayer organic EL layers include *hole injection layer / emissive layer**, *hole injection layer / hole transport layer / emissive layer**, *hole injection layer / emissive layer / electron injection layer**, *hole injection layer / hole transport layer / emissive layer / electron injection layer**, *hole injection layer / emissive layer / hole blocking layer / electron injection layer**, *hole injection layer / emissive layer / hole transport layer / emissive layer / hole blocking layer / electron injection layer**, *emissive layer / hole blocking layer / electron injection layer**, and *emissive layer / electron injection layer**. * indicates the anode side, and ** indicates the cathode side.

[0178] The thickness of the organic EL layer 3 is not particularly limited, but is, for example, 10 nm to 5 μm.

[0179] The transparent electrode layer 4 is configured as an electrode layer having an opposite charge to the metal electrode layer 2. The transparent electrode layer 4 is required to transmit the light emitted from the red light-emitting section 3R, the green light-emitting section 3G, and the blue light-emitting section 3B to the color filter 5 side described below, and therefore the transparent electrode layer 4 is preferably configured from a material that is transparent and conductive. Examples of such materials include metal oxides, and specific examples include indium tin oxide (ITO), indium oxide, zinc oxide, and stannic oxide.

[0180] The thickness of the transparent electrode layer 4 is not particularly limited, but is usually about 100 nm to 300 nm.

[0181] The color filter 5 corresponds to the color filter of the present invention described above, and preferred embodiments thereof are also the same as those described above. Because the color filter 5 is made of a cured product of a photocurable composition containing an alkali-soluble resin, development (patterning) can be performed to remove areas where no color filter is required (5' in FIG. 1), such as spaces used for bonding pads. Furthermore, as described above, the color filter 5 has a specific absorption spectrum. Therefore, even when the color filter 5 is formed as a pattern spanning the red light-emitting portion 3R, the green light-emitting portion 3G, and the blue light-emitting portion 3B, it can provide good color purity, and high-resolution patterning for each pixel is not required.

[0182] The transparent substrate 6 can be any transparent substrate commonly used in this technical field, and examples thereof include a glass plate such as quartz glass, and a transparent resin plate such as polycarbonate, polymethyl methacrylate, or polyethylene terephthalate.

[0183] The thickness of the transparent substrate 6 may be adjusted appropriately depending on the application of the display device, and is, for example, 0.3 to 1 mm.

[0184] The display device 100 may further include other layers. For example, the display device 100 may have a functional layer 8 on a transparent substrate 6, or may have a TFT (thin film transistor) 9 between the substrate 1 and the metal electrode layer 2. Examples of the functional layer 8 include a conventionally known hard coat layer and an anti-reflection layer. The functional layer 8 may be a single layer, or may be composed of multiple layers having different functions. In the present invention, since the color filter 5 has anti-reflection capability as described above, it is preferable that an anti-reflection layer is not required as the functional layer 8. [Example]

[0185] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples, and can of course be practiced with appropriate modifications within the scope of the above and below-described aims, all of which are included within the technical scope of the present invention. In the following, unless otherwise specified, "parts" means "parts by mass" and "%" means "% by mass."

[0186] The polystyrene-equivalent weight average molecular weight (Mw) and number average molecular weight (Mn) of the resin were measured by GPC under the following conditions. Apparatus: HLC-8120GPC (Tosoh Corporation) Column: TSK-GELG2000HXL Column temperature: 40℃ Solvent: tetrahydrofuran Flow rate: 1.0mL / min Solid concentration of the analytical sample: 0.001 to 0.01% by mass Injection volume: 50μL Detector: RI Calibration standard materials: TSK STANDARD POLYSTYRENE F-40, F-4, F-288, A-2500, A-500 (manufactured by Tosoh Corporation)

[0187] The ratio of the weight average molecular weight and the number average molecular weight (Mw / Mn) calculated in terms of polystyrene obtained above was taken as the dispersity.

[0188] [Synthesis of Colorant] (Colorant Synthesis Example 1) A compound represented by formula (15) was synthesized according to the description in Example 7 of WO 2022 / 024926.

[0189] [ka]

[0190] [Preparation of Dispersion] (Dispersion Preparation Example 1) 14 parts of CI Pigment Yellow 180, 5.3 parts of a dispersant (BYK BYKLPN-6919) (solids content equivalent), 3.3 parts of ethyl lactate, and 77 parts of propylene glycol monomethyl ether acetate were mixed, to which 300 parts of 0.2 μm zirconia beads were added, followed by shaking for 1 hour using a paint conditioner (LAU). The zirconia beads were then removed by filtration to obtain dispersion (A-1).

[0191] (Dispersion Preparation Example 2) 12 parts of CI Pigment Red 202, 3.0 parts of a dispersant (BYK BYKLPN-6919) (solids content equivalent), 10 parts of ethyl lactate, and 75 parts of propylene glycol monomethyl ether acetate were mixed, to which 300 parts of 0.2 μm zirconia beads were added, followed by shaking for 1 hour using a paint conditioner (LAU). The zirconia beads were then removed by filtration to obtain dispersion (A-2).

[0192] (Dispersion Preparation Example 3) 12 parts of CI Pigment Blue 15:6, 2.2 parts of a dispersant (BYK BYKLPN-6919) (solids content equivalent), 0.3 parts of ethyl lactate, and 86 parts of propylene glycol monomethyl ether acetate were mixed, to which 300 parts of 0.2 μm zirconia beads were added, followed by shaking for 1 hour using a paint conditioner (LAU). The zirconia beads were then removed by filtration to obtain dispersion (A-3).

[0193] (Dispersion Preparation Example 4) 13 parts of CI Pigment Violet 19, 3.6 parts of a dispersant (BYK BYKLPN-6919) (solids equivalent), 2.5 parts of ethyl lactate, and 81 parts of propylene glycol monomethyl ether acetate were mixed, to which 300 parts of 0.2 μm zirconia beads were added, followed by shaking for 1 hour using a paint conditioner (LAU). The zirconia beads were then removed by filtration to obtain dispersion (A-4).

[0194] (Dispersion Preparation Example 5) 12 parts of CI Pigment Yellow 139, 4.2 parts of a dispersant (BYKLPN-6919 manufactured by BYK) (solids equivalent), and 84 parts of propylene glycol monomethyl ether acetate were mixed, to which 300 parts of 0.2 μm zirconia beads were added, followed by shaking for 1 hour using a paint conditioner (manufactured by LAU). The zirconia beads were then removed by filtration to obtain dispersion (A-5).

[0195] (Dispersion Preparation Example 6) 12 parts of the compound represented by formula (15), 4.2 parts of a dispersant (BYKLPN-6919 manufactured by BYK) (solid content equivalent), and 84 parts of propylene glycol monomethyl ether acetate were mixed, to which 300 parts of 0.2 μm zirconia beads were added, and the mixture was shaken for 1 hour using a paint conditioner (manufactured by LAU). The zirconia beads were then removed by filtration to obtain dispersion (A-6).

[0196] [Resin synthesis] (Synthesis of Resin (B-1)) A flask equipped with a stirring blade, reflux condenser, thermometer, and dropping funnel was charged with 224 parts of propylene glycol monomethyl ether and heated to 90°C. A solution containing 170.3 parts of vinyl toluene, 87.4 parts of 2-(acetoacetoxy)ethyl methacrylate, 74.9 parts of methacrylic acid, 16.0 parts of azobis(isobutyronitrile), and 96.0 parts of propylene glycol monomethyl ether was continuously added dropwise to the flask using the dropping funnel. The temperature inside the flask was maintained at 90±1°C during the dropping of the mixed solution, and the dropping was completed after 3 hours. After the dropping was completed, the temperature inside the flask was maintained at 90±1°C for 6 hours. After the reaction, the reaction mixture was cooled to 40°C or below, and 0.4 parts of 4-methoxyphenol, 53.4 parts of 3,4-epoxycyclohexylmethyl acrylate, 15.0 parts of triphenylphosphine, and 262.5 parts of propylene glycol monomethyl ether were added. The temperature in the flask was raised to 110°C, and an addition reaction was carried out at a temperature of 110±1°C to obtain a resin (B-1) solution. The solids content of the resulting resin (B-1) solution was 23.8% by mass, and the weight-average molecular weight (Mw) of the resin (B-1) contained in the solution was 14,500, and the acid value (solids equivalent) was 89 (mg-KOH / g). Resin (B-1) has the following structural units:

[0197] [ka]

[0198] (Synthesis of resin b) 100 parts of propylene glycol monomethyl ether acetate was placed in a flask equipped with a stirrer, dropping funnel, condenser, thermometer, and gas inlet tube. The mixture was stirred and heated to 120°C while purging with nitrogen. Next, 0.47 parts of Perbutyl O was added to a monomer mixture consisting of 7 parts of tricyclodecanyl methacrylate, 27 parts of benzyl methacrylate, and 13 parts of methacrylic acid. This mixture was added dropwise from the dropping funnel to the flask over 2 hours and stirred at 120°C for another 2 hours to obtain a copolymer solution. Next, the atmosphere in the flask was replaced with air, and 7 parts of glycidyl methacrylate, 0.34 parts of triphenylphosphine, and 0.07 parts of methylhydroquinone were added to the copolymer solution. The reaction was continued at 120°C until the solid acid value reached 105 mg-KOH / g, at which point the reaction was terminated. 32 parts of propylene glycol monomethyl ether acetate was added to obtain a resin b (Mw: 30,000) solution with a nonvolatile content of 30%.

[0199] Example 1 <Preparation of Photocurable Composition 1> Photocurable composition 1 was obtained by mixing the following components. Dispersion liquid (A-1) 5.6 parts Dispersion liquid (A-2) 44 parts Dispersion liquid (A-3) 12 parts Colorant (A-7): FDB-022: Yamada Chemical Co., Ltd. 0.64 parts Colorant (A-8): FDB-009: Yamada Chemical Co., Ltd. 1.17 parts Resin (B-1) solution 168 parts Polymerizable compound (C-1): Dipentaerythritol polyacrylate: Product name A-9550: 50 parts by Shin-Nakamura Chemical Co., Ltd. Polymerizable compound (C-2): Ethoxylated glycerin triacrylate: trade name A-Gly-3E: manufactured by Shin-Nakamura Chemical Co., Ltd. 10 parts Polymerization initiator (D): N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine (trade name: PBG-327); O-acyloxime compound: 5 parts, manufactured by Changzhou Strong Electronic New Materials Co., Ltd. Solvent (E-1): Cyclopentanone 35 parts Solvent (E-2): 57 parts propylene glycol monomethyl ether acetate Leveling agent (F): Polyether-modified silicone oil: Toray Silicone SH8400 (manufactured by Toray Dow Corning Co., Ltd.) 0.01 part

[0200] <Fabrication of patterned color filters> Photocurable composition 1 was applied by spin coating onto a 5 cm square glass substrate (Eagle 2000; Corning Incorporated) so that the film thickness after post-baking would be 3 μm, and then pre-baked at 70° C. for 1 minute to form a composition layer. After cooling, the substrate on which the composition layer was formed was placed at a distance of 100 μm from a quartz glass photomask, and the composition layer was exposed to light at 100 mJ / cm 2 in the air using an exposure machine (TME-150RSK; Topcon Corporation). 2 The film was irradiated with light at an exposure dose of 100 μm (based on 365 nm). A photomask with a 100 μm line and space pattern was used. The composition layer after light irradiation was immersed and developed in an aqueous developer containing 0.12% of a nonionic surfactant and 0.04% of potassium hydroxide at 23° C. for 60 seconds, washed with water, and then post-baked in an oven at 100° C. for 15 minutes to obtain a patterned color filter. The film thickness of the obtained color filter was measured using a film thickness measuring device (DEKTAK3; manufactured by Japan Vacuum Engineering Co., Ltd.).

[0201] Example 2 A patterned color filter was obtained in the same manner as in Example 1, except that photocurable composition 2 obtained by mixing the following components was used instead of photocurable composition 1. Dispersion liquid (A-1) 7.0 parts Dispersion liquid (A-3) 16 parts Dispersion liquid (A-4) 30 parts Colorant (A-7): FDB-022: Yamada Chemical Co., Ltd. 0.49 parts Colorant (A-8): FDB-009: Yamada Chemical Co., Ltd. 1.96 parts Resin (B-1) solution 168 parts Polymerizable compound (C-1): Dipentaerythritol polyacrylate: Product name A-9550: 50 parts by Shin-Nakamura Chemical Co., Ltd. Polymerizable compound (C-2): Ethoxylated glycerin triacrylate: trade name A-Gly-3E: manufactured by Shin-Nakamura Chemical Co., Ltd. 10 parts Polymerization initiator (D): N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine (trade name: PBG-327); O-acyloxime compound: 5 parts, manufactured by Changzhou Strong Electronic New Materials Co., Ltd. Solvent (E-1): Cyclopentanone 41 parts Solvent (E-2): Propylene glycol monomethyl ether acetate 58 parts Leveling agent (F): Polyether-modified silicone oil: Toray Silicone SH8400 (manufactured by Toray Dow Corning Co., Ltd.) 0.01 part

[0202] Example 3 A patterned color filter was obtained in the same manner as in Example 1, except that photocurable composition 3 obtained by mixing the following components was used instead of photocurable composition 1. Dispersion liquid (A-2) 39 parts Dispersion liquid (A-3) 16 parts Dispersion liquid (A-5) 3.9 parts Colorant (A-7): FDB-022: Yamada Chemical Co., Ltd. 0.38 parts Colorant (A-8): FDB-009: Yamada Chemical Co., Ltd. 1.87 parts Resin (B-1) solution 168 parts Polymerizable compound (C-1): Dipentaerythritol polyacrylate: Product name A-9550: 50 parts by Shin-Nakamura Chemical Co., Ltd. Polymerizable compound (C-2): Ethoxylated glycerin triacrylate: trade name A-Gly-3E: manufactured by Shin-Nakamura Chemical Co., Ltd. 10 parts Polymerization initiator (D): N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine (trade name: PBG-327); O-acyloxime compound: 5 parts, manufactured by Changzhou Strong Electronic New Materials Co., Ltd. Solvent (E-1): Cyclopentanone 41 parts Solvent (E-2): 52 parts propylene glycol monomethyl ether acetate Leveling agent (F): Polyether-modified silicone oil: Toray Silicone SH8400 (manufactured by Toray Dow Corning Co., Ltd.) 0.01 part

[0203] Example 4 A patterned color filter was obtained in the same manner as in Example 1, except that photocurable composition 4 obtained by mixing the following components was used instead of photocurable composition 1. Dispersion liquid (A-4) 51 parts Dispersion liquid (A-5) 4.6 parts Dispersion liquid (A-6) 0.83 parts Colorant (A-7): FDB-022: Yamada Chemical Co., Ltd. 0.39 parts Colorant (A-8): FDB-009: Yamada Chemical Co., Ltd. 1.66 parts Resin (B-1) solution 168 parts Polymerizable compound (C-1): Dipentaerythritol polyacrylate: Product name A-9550: 50 parts by Shin-Nakamura Chemical Co., Ltd. Polymerizable compound (C-2): Ethoxylated glycerin triacrylate: trade name A-Gly-3E: manufactured by Shin-Nakamura Chemical Co., Ltd. 10 parts Polymerization initiator (D): N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine (trade name: PBG-327); O-acyloxime compound: 5 parts, manufactured by Changzhou Strong Electronic New Materials Co., Ltd. Solvent (E-1): Cyclopentanone 54 parts Solvent (E-2): 42 parts propylene glycol monomethyl ether acetate Leveling agent (F): Polyether-modified silicone oil: Toray Silicone SH8400 (manufactured by Toray Dow Corning Co., Ltd.) 0.01 part

[0204] Example 5 A patterned color filter was obtained in the same manner as in Example 1, except that photocurable composition 5 obtained by mixing the following components was used instead of photocurable composition 1. Dispersion liquid (A-4) 36 parts Dispersion liquid (A-6) 0.82 parts Colorant (A-7): FDB-022: Yamada Chemical Co., Ltd. 0.47 parts Colorant (A-8): FDB-009: Yamada Chemical Co., Ltd., 2.3 parts Colorant (A-9): Metal complex dye (Neozapon Red 355 manufactured by BASF; CI Solvent Red 119) 1.6 parts Resin (B-1) solution 168 parts Polymerizable compound (C-1): Dipentaerythritol polyacrylate: Product name A-9550: manufactured by Shin-Nakamura Chemical Co., Ltd. 60 parts Polymerization initiator (D): N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine (trade name: PBG-327); O-acyloxime compound: 5 parts, manufactured by Changzhou Strong Electronic New Materials Co., Ltd. Solvent (E-1): Cyclopentanone 54 parts Solvent (E-2): 57 parts propylene glycol monomethyl ether acetate Leveling agent (F): Polyether-modified silicone oil: Toray Silicone SH8400 (manufactured by Toray Dow Corning Co., Ltd.) 0.01 part

[0205] <Absorbance evaluation> The transmittance of the obtained color filter in the wavelength region of 300 nm to 780 nm was measured at 1 nm intervals using a UV-Vis-NIR spectrophotometer V-770 (manufactured by JASCO Corporation), and the measured values ​​were converted to absorbance to create an absorption spectrum. Note that Figure 2 shows the absorption spectrum of the color filter obtained in Example 1. The absorption spectra of the color filters obtained in Examples 1 to 5 all had one or more absorption minimums in the wavelength range of 410 to 480 nm, one or more absorption maximums in the wavelength range of 480 to 510 nm, one or more absorption minimums in the wavelength range of 510 to 560 nm, and one or more absorption maximums in the wavelength range of 560 to 600 nm, i.e., they satisfied the above-mentioned requirement (1). Table 1 also shows the absorbances corresponding to Av1, Av2, Ap1 and Ap2, the wavelengths at which these absorbances are shown, and the absorbance corresponding to A730. The A365 of the color filter obtained in Example 1 was 0.582.

[0206] [Table 1]

[0207] The color filters of Examples 1 to 5, which satisfy all of the above requirements (1) to (6), can be applied to the red, blue, and green light-emitting sections, and can increase the color purity of the light emitted from the light-emitting sections of each color, just like conventional color filters.

[0208] <Anti-reflection evaluation> (Preparation of Comparative Coloring Composition) 14 parts of CI Pigment Red 291, 4.4 parts of a dispersant, and 82 parts of propylene glycol monomethyl ether acetate were mixed and dispersed to obtain a red dispersion liquid 1. 12 parts of CI Pigment Yellow 139, 4.2 parts of a dispersant, and 84 parts of propylene glycol monomethyl ether acetate were mixed and dispersed to obtain a yellow dispersion 1. 12 parts of CI Pigment Yellow 150, 4.9 parts of a dispersant, and 83 parts of propylene glycol monomethyl ether acetate were mixed and dispersed to obtain a yellow dispersion 2. 13 parts of CI Pigment Green 36, 3.8 parts of a dispersant, and 83 parts of propylene glycol monomethyl ether acetate were mixed and dispersed to obtain a green dispersion liquid 1. 8 parts of CI Pigment Blue 15:6, 4 parts of CI Pigment Violet 23, 4.2 parts of a dispersant, and 84 parts of propylene glycol monomethyl ether acetate were mixed and dispersed to obtain a blue dispersion liquid 1.

[0209] <Preparation of Red Colored Composition> A red colored composition was obtained by mixing the following components. Red dispersion 1 31 parts Yellow dispersion 1 3.4 parts Green dispersion 1 1.3 parts 20 parts of resin b solution Polymerizable compound: 3.2 parts of pentaerythritol polyacrylate (NK Ester A-TMM-3LM-N; manufactured by Shin-Nakamura Chemical Co., Ltd.) Polymerization initiator: Adeka Arcles (registered trademark) NCI-831E 0.55 parts Leveling agent: Polyether-modified silicone oil: Toray Silicone SH8400 (manufactured by Toray Dow Corning Co., Ltd.) 0.02 parts Solvent: 57 parts propylene glycol monomethyl ether acetate

[0210] <Preparation of Green Colored Composition> A green colored composition was obtained by mixing the following components. Green dispersion 1 16 parts Yellow dispersion 2 13 parts Red dispersion 1 1.0 parts 20 parts of resin b solution Polymerizable compound: 2 parts pentaerythritol polyacrylate (NK Ester A-TMM-3LM-N; manufactured by Shin-Nakamura Chemical Co., Ltd.) Polymerization initiator: Adeka Arcles (registered trademark) NCI-831E 0.48 parts Leveling agent: Polyether-modified silicone oil: Toray Silicone SH8400 (manufactured by Toray Dow Corning Co., Ltd.) 0.01 part Solvent: 25 parts propylene glycol monomethyl ether Solvent: 19 parts propylene glycol monomethyl ether acetate

[0211] <Preparation of Blue Colored Composition> A blue colored composition was obtained by mixing the following components. Blue dispersion 1 24 parts 20 parts of resin b solution Polymerizable compound: 4.8 parts of pentaerythritol polyacrylate (NK Ester A-TMM-3LM-N; manufactured by Shin-Nakamura Chemical Co., Ltd.) Polymerization initiator: Adeka Arcles (registered trademark) NCI-831E 0.69 parts Leveling agent: Polyether-modified silicone oil: Toray Silicone SH8400 (manufactured by Toray Dow Corning Co., Ltd.) 0.01 part Solvent: 60 parts propylene glycol monomethyl ether acetate

[0212] <Preparation of comparative color filters> Using the above red coloring composition, green coloring composition, and blue coloring composition, a comparative red color filter, a comparative green color filter, and a comparative blue color filter were each produced. Specifically, the above coloring composition was applied by spin coating to a 5 cm square glass substrate (Eagle 2000; manufactured by Corning Incorporated) so that the film thickness after post-baking would be 3 μm, and then pre-baked at 70 ° C. for 1 minute to form a coloring composition layer. After cooling, the coloring composition layer on the substrate was exposed to 100 mJ / cm 2 in an air atmosphere using an exposure machine (TME-150RSK; manufactured by Topcon Corporation). 2 The entire surface was irradiated with light at an exposure amount (365 nm standard) of 1. The colored composition layer after light irradiation was post-baked at 100° C. for 15 minutes to obtain a comparative red color filter, a comparative green color filter, and a comparative blue color filter.

[0213] <Reflectance measurement> For the color filters obtained in the examples and the comparative color filters, the reflectance in the wavelength range of 380 nm to 780 nm was measured every 1 nm using an integrating sphere unit ISN-928 connected to an ultraviolet-visible-near-infrared spectrophotometer V-770 (manufactured by JASCO Corporation), and the average reflectance in the wavelength range of 380 nm to 780 nm was calculated. The average reflectances of the color filters obtained in the examples and the average reflectances of the comparative color filters (comparative examples) are shown in Table 2. The average reflectance of the comparative color filters (comparative examples) represents the average of the average reflectances of the comparative red color filter, the comparative green color filter, and the comparative blue color filter. The smaller the average reflectance value, the more excellent the anti-reflection ability for external light.

[0214] [Table 2]

[0215] It can be seen from Table 2 that the color filters of Examples 1 to 5, which satisfy all of the above requirements (1) to (6), also have excellent anti-reflection properties. [Explanation of symbols]

[0216] 100 display device 1 board 2 Metal electrode layer 3 Organic EL layer 3R Red light emitting part 3G green light emitting part 3B Blue light emitting part 4 Transparent electrode layer 5 Color Filters 6 Transparent substrate 7R red pixel 7G green pixel 7B Blue pixel

Claims

1. A color filter comprising a cured product of a photocurable composition containing a colorant and an alkali-soluble resin, A color filter exhibiting an absorption spectrum that satisfies all of the following requirements (1) to (6): (1) having one or more minimum absorption wavelengths in the wavelength range of 410 to 480 nm, one or more maximum absorption wavelengths in the wavelength range of 480 to 510 nm, one or more minimum absorption wavelengths in the wavelength range of 510 to 560 nm, and one or more maximum absorption wavelengths in the wavelength range of 560 to 600 nm (2) Av1 / Av2<1 (3) Ap1 / Ap2<1 (4) (Av1+Av2+A730) / 3≦0.25 (5) Ap2>0.35 (6) Ap1>0.25 Av1: Minimum absorbance at the minimum absorption wavelength in the wavelength range of 410 to 480 nm Av2: Minimum absorbance at the minimum absorption wavelength in the wavelength range of 510 to 560 nm Ap1: Maximum absorbance at the maximum absorption wavelength in the wavelength range of 480 to 510 nm Ap2: Maximum absorbance at the maximum absorption wavelength in the wavelength range of 560 to 600 nm A730: absorbance at a wavelength of 730 nm

2. The color filter of claim 1 , wherein the colorant comprises a pigment.

3. The color filter according to claim 2 , wherein the pigment comprises a pigment having a quinacridone skeleton.

4. 2. The color filter according to claim 1, wherein the value of (Av1+Av2+A730) / 3 in the requirement (4) is 0.1 or more.

5. The color filter of claim 1 which is patterned.

6. 2. The color filter according to claim 1, wherein the film thickness is 0.5 to 4 μm.

7. A display device comprising the color filter according to any one of claims 1 to 6.

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