Wavelength-selective absorption filter and organic electroluminescent display device

Abstract

The present invention provides: a wavelength-selective absorption filter which contains a resin and dyes B, C and D that have principal absorption wavelength bands in different wavelength ranges, wherein the absorbances Ab (λ) of this wavelength-selective absorption filter at wavelengths λ nm satisfy relational expressions (I) and (II); and an organic electroluminescent display device which comprises this wavelength-selective absorption filter.　Relational expression (I): Ab(500) / Ab(600) < 0.7 Relational expression (II): Ab(430) / Ab(700) < 3.0

Description

Wavelength-selective absorption filter and organic electroluminescence display device

[0001] The present invention relates to a wavelength-selective absorption filter and an organic electroluminescence display device.

[0002] Organic electroluminescence (OLED) display devices are devices that display images by utilizing the spontaneous emission of OLED elements. Therefore, compared to various display devices such as liquid crystal display devices and plasma display devices, they have advantages such as a high contrast ratio, excellent color reproducibility, a wide viewing angle, fast response, and the possibility of being thin and lightweight. In addition to these advantages, OLED display devices are also being actively researched and developed as next-generation display devices due to their flexibility.

[0003] On the other hand, when an OLED display device is used in an environment with external light such as outdoors, external light is reflected by metal electrodes and the like that constitute the OLED display device, resulting in display defects such as a decrease in contrast. A technique for suppressing external light reflection by providing a circular polarizer with an optically anisotropic layer such as a λ / 4 retardation film is known, but this technique causes a problem of a decrease in brightness.

[0004] In recent years, technologies have been developed to suppress brightness reduction while suppressing external light reflection by providing a light-absorbing layer capable of absorbing external light. For example, Patent Document 1 describes a light-absorbing layer provided between an emitting layer and an anti-reflection film in a white light source type OLED color filter. The light-absorbing layer contains a carbon black pigment and a dye (coloring matter), has a transmittance of 15 to 50% in the wavelength range of 400 nm to 700 nm, and has a haze value of 1.0 or less. Furthermore, Patent Document 2 describes a light-absorbing filter for an OLED display device that exhibits an absorption spectrum that has a negative correlation with the output spectrum obtained by combining the spectra of multiple color pixels. Patent Document 3 describes a wavelength-selective absorption filter for an OLED display device that contains four dyes that absorb at different wavelengths so as to satisfy a specific absorbance relationship.

[0005] JP 2017-203810 A JP 2014-132522 A International Publication No. 2021 / 014973

[0006] On the other hand, suppressing external light reflection requires not only the magnitude of external light reflectance but also the suppression of the influence of the color of the external light reflection on the original color of the image display device. As described in Patent Document 3, in the light-absorbing layer (light-absorbing filter) described in Patent Document 1, the color of the image of the OLED display device changes depending on the color material, such as a dye, contained in the light-absorbing filter, and it has been found that there is room for improvement in suppressing color changes. Furthermore, the light-absorbing filter described in Patent Document 2 does not describe how to achieve the desired absorption spectrum. Furthermore, after extensive research by the inventors, Patent Document 3 found that while the wavelength-selective absorption filter can suppress both external light reflection and luminance reduction to a certain level and suppress color changes due to the presence or absence of the wavelength-selective absorption filter, it does not describe suppressing the influence of the color of the external light reflection on the original color of the image display device. Furthermore, although development of display devices with a wider color gamut and higher saturation than conventional devices is progressing, it has been found that there is room for improvement in suppressing luminance reduction when the wavelength-selective absorption filter described in Patent Document 3 is used in display devices with a wider color gamut and higher saturation.

[0007] Therefore, an object of the present invention is to provide a wavelength-selective absorption filter that achieves both suppression of external light reflection and suppression of the influence of reflected color on the original color of a displayed image (i.e., making it difficult to visually recognize the difference in color between the display light and reflected light of a displayed image), and that, when applied to a wide color gamut OLED display device, is excellent at suppressing a decrease in the luminance of light emitted from the OLED, and an organic electroluminescence display device including the same.

[0008] As a result of intensive research conducted by the inventors in light of the above-mentioned problems, they found that a selective wavelength absorption filter having an increased content of a dye having a main absorption wavelength band in the wavelength range of 580 to 620 nm can both suppress external light reflection and reduce the influence of the reflected color on the original color of the displayed image, and that by combining this wavelength selective absorption filter with a light source having a narrow half-width of G (green) emitted light, it is possible to minimize the decrease in brightness. The present invention was completed after further research based on this finding.

[0009] That is, the above-mentioned problems have been solved by the following means. <1> A wavelength-selective absorption filter containing a resin and the following dyes B, C, and D, which have main absorption wavelength bands in different wavelength ranges, wherein the absorbance Ab(λ) of this wavelength-selective absorption filter at a wavelength λ nm satisfies the following relational formulas (I) and (II): Dye B: A dye which has a main absorption wavelength band in the wavelength range of 480 to 520 nm in the wavelength-selective absorption filter Dye C: A dye which has a main absorption wavelength band in the wavelength range of 580 to 620 nm in the wavelength-selective absorption filter Dye D: A dye which has a main absorption wavelength band in the wavelength range of 680 to 780 nm in the wavelength-selective absorption filter Relational formula (I) Ab(500) / Ab(600)<0.7 Relational formula (II) Ab(430) / Ab(700)<3.0 <2> A wavelength-selective absorption filter according to <1>, which contains the following dye A. <3> A wavelength-selective absorption filter according to <1> or <2>, which satisfies the following relational formula (II-a): Relational formula (II-a) Ab(430) / Ab(700)<1.0 <4> A wavelength-selective absorption filter according to any one of <1> to <3>, which satisfies the following relational formulas (III) and (IV): Relational formula (III) Ab(430) / Ab(600)<1.0 Relational formula (IV) Ab(700) / Ab(600)<2.0 <5> A wavelength-selective absorption filter according to any one of <1> to <4>, which is used in an organic electroluminescence display device in which the half-width of emitted light having a peak in the wavelength range of 500 to 560 nm in the absence of a wavelength-selective absorption filter is 45 nm or less. <6> An organic electroluminescence display device in which the half-width of emitted light having a peak in the wavelength range of 500 to 560 nm in the absence of a wavelength-selective absorption filter is 45 nm or less, the organic electroluminescence display device comprising the wavelength-selective absorption filter according to any one of <1> to <5>.

[0010] In the present invention, when there are multiple substituents or linking groups, etc. (hereinafter referred to as substituents, etc.) represented by a specific symbol or formula, or when multiple substituents, etc. are specified simultaneously, unless otherwise specified, the respective substituents, etc. may be the same or different from one another. The same applies to the specification of the number of substituents, etc. Furthermore, when multiple substituents, etc. are adjacent (especially when they are adjacent), they may be linked to each other to form a ring, unless otherwise specified. Furthermore, unless otherwise specified, rings, such as alicyclic rings, aromatic rings, and heterocyclic rings, may be further condensed to form a condensed ring. In the present invention, unless otherwise specified, the wavelength-selective absorption filter may contain one or more of the components (dyes, resins, other components, etc.) constituting the wavelength-selective absorption filter. In the present invention, unless otherwise specified, the double bond may be either an E-type or a Z-type in the molecule, or a mixture thereof. In the present invention, the term "compound" (including complex) is used to mean not only the compound itself, but also its salts and ions. The term also includes compounds in which the structure has been partially modified as long as the effects of the present invention are not impaired. Furthermore, compounds that are not specified as substituted or unsubstituted may have any substituent as long as the effects of the present invention are not impaired. This also applies to substituents and linking groups. In the present invention, a numerical range expressed using "to" refers to a range that includes the numerical values ​​before and after "to" as the lower and upper limits. In the present invention, the term "composition" encompasses not only mixtures in which the component concentrations are constant (each component is uniformly dispersed), but also mixtures in which the component concentrations vary within a range that does not impair the intended function. In the present invention, "having a main absorption wavelength band in the wavelength range XX to YY nm" means that the wavelength exhibiting maximum absorption (i.e., the maximum absorption wavelength) is present in the wavelength range XX to YY nm. Therefore, as long as this maximum absorption wavelength is within the wavelength range, the entire absorption band including this wavelength may be within the wavelength range, or may extend beyond the wavelength range. Furthermore, if there are multiple maximum absorption wavelengths, it is sufficient that the maximum absorption wavelength exhibiting the greatest absorbance is present in the wavelength range.That is, the maximum absorption wavelength other than the maximum absorption wavelength showing the greatest absorbance may be located either inside or outside the wavelength range XX to YY nm.

[0011] The wavelength-selective absorption filter of the present invention achieves both suppression of external light reflection and suppression of the influence of reflected color on the original color of a displayed image (i.e., the difference in color between the displayed light and reflected light of the displayed image is less noticeable), and further, when applied to a wide color gamut OLED display device, is excellent in suppressing a decrease in the luminance of light emitted from the OLED. The organic electroluminescent display device of the present invention includes the wavelength-selective absorption filter of the present invention, and achieves suppression of external light reflection, suppression of the influence of reflected color on the original color of a displayed image, and suppression of a decrease in luminance.

[0012] Fig. 1 shows the absorption spectrum of the wavelength-selective absorption filter No. 1 produced in the examples. Fig. 2 is a longitudinal cross-sectional view schematically showing the configuration of an OLED display device assumed for performing a simulation of external light reflection in the examples.

[0013] [Wavelength-selective absorption filter] The wavelength-selective absorption filter used in the present invention is a wavelength-selective absorption filter containing a resin and dyes B, C, and D out of the following four dyes A to D, which have main absorption wavelength bands in different wavelength ranges, and the absorbance Ab(λ) of this wavelength-selective absorption filter at a wavelength λ nm satisfies the relationships of the following relational formulas (I) and (II): Dye A: A dye having a main absorption wavelength band in the wavelength range of 390 to 435 nm in the wavelength-selective absorption filter Dye B: A dye having a main absorption wavelength band in the wavelength range of 480 to 520 nm in the wavelength-selective absorption filter Dye C: A dye having a main absorption wavelength band in the wavelength range of 580 to 620 nm in the wavelength-selective absorption filter Dye D: A dye having a main absorption wavelength band in the wavelength range of 680 to 780 nm in the wavelength-selective absorption filter Relational formula (I) Ab(500) / Ab(600)<0.7 Relational formula (II) Ab(430) / Ab(700)<3.0

[0014] In the present invention, the main absorption wavelength band of a dye in a wavelength-selective absorption filter refers to the main absorption wavelength band of the dye measured in the state of the wavelength-selective absorption filter. Specifically, it is measured under the conditions described in the section on absorption maximum values ​​of wavelength-selective absorption filters in the Examples described later. The wavelength-selective absorption filter of the present invention can be produced by incorporating a combination of at least dyes B, C, and D out of the four dyes A to D described above, thereby producing a filter that exhibits an absorption spectrum that satisfies the above-mentioned relational formulas (I) and (II). It is also preferable to combine dye A in addition to dyes B, C, and D. Furthermore, the absorbance ratios described in the above relational formulas (I) and (II) and the below-described relational formulas (III) and (IV) are calculated based on the absorbance Ab of the wavelength-selective absorption filter at each wavelength λnm measured by the method described in the Examples described later. ｘ This value is calculated using the value of (λ).

[0015] The wavelength-selective absorption filter of the present invention may be configured in any manner that can suppress external light reflection, suppress the influence of reflected color on the original color of a displayed image (hereinafter simply referred to as "suppression of the influence of reflected color"), and, when applied to a wide-color-gamut OLED display device, suppress the reduction in luminance of light emitted from the OLED (hereinafter simply referred to as "suppression of luminance reduction"). One form of the wavelength-selective absorption filter of the present invention is a form in which dyes including dyes B to D are dispersed (preferably dissolved) in a resin. This dispersion may be random, regular, or the like. By having the above-described configuration, the wavelength-selective absorption filter of the present invention can suppress external light reflection and maintain the original color of an image of an OLED display device at an excellent level, and, when applied to a wide-color-gamut OLED display device, can satisfactorily suppress the reduction in luminance of light emitted from the OLED. The reason for this is unclear, but is thought to be as follows. In the wavelength-selective absorption filter of the present invention, the dyes A to D have their main absorption wavelength bands in the wavelength ranges of 390 to 435 nm, 480 to 520 nm, 580 to 620 nm, and 680 to 780 nm, respectively, which are wavelength ranges that hardly overlap with B (Blue, 460 nm), G (Green, 520 nm), and R (Red, 620 nm), which are used as light sources in OLED display devices. Among these, by containing (corresponding to) dyes B and C having main absorption wavelength bands in the ranges of 480 to 520 nm and 580 to 620 nm, which have particularly high luminosity sensitivity, and (corresponding to) dye D having a main absorption wavelength band in the range of 680 to 780 nm, where the substrate reflectance tends to be high, and by satisfying the above relational formulas (I) and (II), the wavelength-selective absorption filter of the present invention can suppress reflection of external light and make the reflected color closer to the color of the displayed light (the original color of the displayed image), and further, when applied to a wide color gamut OLED display device equipped with a light source with a narrow half-width of G (green) emitted light, can suppress a decrease in the luminance of the light emitted from the OLED.

[0016] The preferred range of the reflection color of the wavelength-selective absorption filter of the present invention is preferably close to the color of the original white display of the display device. The color of the white display of the display device generally has a color temperature of 6500 to 12000 K, which indicates a color temperature of sunlight of 6500 K or higher, and preferably 8000 to 12000 K. The color temperature can be expressed by the following formulas in coordinates on an xy chromaticity diagram: Color temperature 6500 to 12000 K: (0.269, 0.280)≦(x, y)≦(0.313, 0.329) Color temperature 8000 to 12000 K: (0.269, 0.280)≦(x, y)≦(0.295, 0.305) In other words, the reflection color of the wavelength-selective absorption filter of the present invention is preferably in the above color temperature range of 6500 to 12000 K, and more preferably in the above color temperature range of 8000 to 12000 K.

[0017] In the range of Ab(500) / Ab(600) defined by the above relational formula (I) and the range of Ab(430) / Ab(700) defined by the above relational formula (II), preferred ranges are as follows: The upper limit of Ab(500) / Ab(600) in relational formula (I) is less than 0.70, preferably 0.60 or less, more preferably 0.50 or less, even more preferably 0.40 or less, and particularly preferably 0.35 or less. There is no particular restriction on the lower limit, but a practical range is 0.05 or more, preferably 0.10 or more, more preferably 0.15 or more, and even more preferably 0.20 or more. That is, 0.05≦Ab(500) / Ab(600)<0.70 is practical, 0.10≦Ab(500) / Ab(600)≦0.60 is preferred, 0.15≦Ab(500) / Ab(600)≦0.50 is more preferred, 0.20≦Ab(500) / Ab(600)≦0.40 is even more preferred, and 0.20≦Ab(500) / Ab(600)≦0.35 is particularly preferred. The upper limit of Ab(430) / Ab(700) in relational formula (II) is less than 3.0, and from the viewpoint of more effectively suppressing a decrease in brightness when applied to a wide color gamut OLED display device, it is preferably less than 2.0, more preferably less than 1.5, and even more preferably less than 1.0. Furthermore, from the viewpoint of more effectively suppressing the influence of reflected color on the original color of a displayed image, it is particularly preferably 0.80 or less, and of these, 0.70 or less is preferable. There is no particular restriction on the lower limit, but it should be 0 or more, and is preferably 0.10 or more, more preferably 0.15 or more, even more preferably 0.20 or more, and particularly preferably 0.30 or more. That is, it is sufficient that 0≦Ab(430) / Ab(700)<3.0, preferably 0.10≦Ab(430) / Ab(700)<2.0, more preferably 0.15≦Ab(430) / Ab(700)<1.5, even more preferably 0.20≦Ab(430) / Ab(700)<1.0, particularly preferably 0.30≦Ab(430) / Ab(700)≦0.80, and especially preferably 0.30≦Ab(430) / Ab(700)≦0.70.

[0018] When the relational expressions (I) and (II) satisfy the above-mentioned preferable ranges, it becomes easier to reduce the reflectance caused by the wavelength-selective absorption filter (suppression of external light reflection), suppress the influence of the reflected color on the original color of the displayed image, and suppress a decrease in brightness when applied to a wide color gamut OLED display device.

[0019] The wavelength selective absorption filter of the present invention preferably satisfies at least one of the following relational expressions (III) and (IV), and more preferably satisfies both of the following relational expressions (III) and (IV). Relational expression (III): Ab(430) / Ab(600)<1.0 Relational expression (IV): Ab(700) / Ab(600)<2.0 The upper limit of Ab(430) / Ab(600) in relational expression (III) is less than 1.0, preferably 0.80 or less, more preferably 0.60 or less, even more preferably 0.40 or less, and particularly preferably 0.30 or less. There is no particular restriction on the lower limit, but it may be 0 or more, preferably 0.03 or more, more preferably 0.05 or more, even more preferably 0.10 or more, and particularly preferably 0.15 or more. That is, 0≦Ab(430) / Ab(600)<1.0 is sufficient, 0.03≦Ab(430) / Ab(600)≦0.80 is preferred, 0.05≦Ab(430) / Ab(600)≦0.60 is more preferred, 0.10≦Ab(430) / Ab(600)≦0.40 is even more preferred, and 0.15≦Ab(430) / Ab(600)≦0.30 is particularly preferred. The upper limit of Ab(700) / Ab(600) in the relational formula (IV) is less than 2.0, preferably less than 1.6, more preferably less than 1.4, still more preferably 1.2 or less, and particularly preferably 1.1 or less. From the viewpoint of better suppressing the influence of reflected color on the inherent color of the displayed image, Ab(700) / Ab(600) is preferably 1.0 or less, more preferably 0.90 or less, and even more preferably 0.80 or less. There is no particular restriction on the lower limit, but it is sufficient as long as it is 0 or more, preferably 0.03 or more, more preferably 0.05 or more, even more preferably 0.10 or more, particularly preferably 0.15 or more, and especially preferably 0.20 or more. That is, it is sufficient as long as 0≦Ab(700) / Ab(600)<2.0, preferably 0.03≦Ab(700) / Ab(600)<1.6, more preferably 0.05≦Ab(700) / Ab(600)<1.4, more preferably 0.10≦Ab(700) / Ab(600)≦1.2, and particularly preferably 0.15≦Ab(700) / Ab(600)≦1.1.In particular, 0.20≦Ab(700) / Ab(600)≦1.0 is preferred, 0.20≦Ab(700) / Ab(600)≦0.90 is more preferred, and 0.20≦Ab(700) / Ab(600)≦0.80 is even more preferred. By satisfying at least one (preferably both) of the above relational expressions (III) and (IV) in addition to the above relational expressions (I) and (II), it becomes easier to reduce the reflectance caused by the wavelength selective absorption filter (suppression of external light reflection), suppress the influence of reflected color on the original color of the displayed image, and suppress a decrease in brightness when applied to a wide color gamut OLED display device.

[0020] In addition, when the value of Ab(430) is 0 because the wavelength-selective absorption filter of the present invention does not contain dye A, for example, the values ​​of Ab(430) / Ab(700) in the above relational formula (II) and Ab(430) / Ab(600) in the above relational formula (III) are both 0. On the other hand, when the wavelength-selective absorption filter of the present invention contains dye A or the absorption base of dye B is present at a wavelength of 430 nm, and therefore exhibits an absorbance of Ab(430) exceeding 0, the lower limits of Ab(430) / Ab(700) in the above relational formula (II) and Ab(430) / Ab(600) in the above relational formula (III) may each be 0 or greater, and are preferably equal to or greater than the above-mentioned preferred values. However, when the wavelength-selective absorption filter of the present invention contains dye A, it is more preferable that the upper limit of Ab(430) / Ab(700) in the above relational formula (II) is less than 1.0, and the above relational formula (III) is satisfied. In this case, from the relationship between the above relational expression (I) (Ab(500) / Ab(600)<0.7) and the above relational expression (III) (Ab(430) / Ab(600)<1.0), Ab(430) / Ab(500)<0.7 is satisfied, and Ab(430) has a small value relative to all of Ab(500), Ab(600), and Ab(700).

[0021] <Dye> The wavelength-selective absorption filter of the present invention contains the above-mentioned dye B, dye C, and dye D. In the present invention, the "dye" is not particularly limited as long as it can be dispersed (preferably dissolved) in a resin in the wavelength-selective absorption filter to suppress external light reflection and, when applied to a wide-color-gamut OLED display device, to suppress a decrease in brightness, and can maintain the original color of the image of the OLED display device at an excellent level. The wavelength-selective absorption filter of the present invention may contain at least one of the above-mentioned dyes B, C, and D, independently, or may contain two or more of them. The wavelength-selective absorption filter of the present invention preferably contains dye A in addition to dyes B, C, and D, and may also contain dyes other than the above-mentioned dyes A to D (other dyes) as long as the effects of the present invention are achieved.

[0022] (Dye A) There are no particular limitations on the dye A, and various dyes can be used as long as they have a main absorption wavelength band in the wavelength range of 390 to 435 nm in the wavelength selective absorption filter. The wavelength range in which dye A has a main absorption wavelength band is preferably 395 to 435 nm, more preferably 400 to 435 nm, and even more preferably 405 to 435 nm.

[0023] As the dye A, a dye represented by the following general formula (A1) is preferred because it has a sharp absorption waveform in the main absorption wavelength band.

[0024]

[0025] In formula (A1), R １ and R ２ each independently represents an alkyl group or an aryl group; R ３ ~R ６ each independently represents a hydrogen atom or a substituent, R ５ and R ６ may be bonded to each other to form a six-membered ring.

[0026] With regard to the definition and preferred range of each substituent in general formula (A1), unless otherwise specified, the descriptions regarding each substituent of the dye represented by general formula (A1) described in WO 2022 / 138925 can be applied as they are.

[0027] From the viewpoint of heat resistance and light resistance, R １ and R ２ It is also preferable that all of R are aryl groups. １ and R ２ When each independently represents an aryl group, R ３ , R ５ and R ６ are each independently a hydrogen atom, an alkyl group, or an aryl group, and R ３ and R ６ At least one of R is preferably a hydrogen atom. ３ represents a hydrogen atom, R ５ and R ６ More preferably, each independently represents an alkyl group or an aryl group, and R ３ represents a hydrogen atom, R ５ and R ６ More preferably, each independently represents an alkyl group, and R ３ represents a hydrogen atom, R ５ and R ６ each independently represents an alkyl group, and R ５ and R ６ are particularly preferably bonded to each other to form a ring, which is condensed with a pyrrole ring, and together with the pyrrole ring forms an indole ring. That is, the dye represented by the above general formula (A1) is particularly preferably a dye represented by the following general formula (A2):

[0028]

[0029] In formula (A2), R １ ~R ４ represents R in general formula (A1). １ ~R ４ and preferred embodiments are also the same.

[0030] In formula (A2), R １５ represents a substituent. １５ Examples of the substituent that can be adopted as R include the substituents included in the substituent group A in the description of the dye represented by general formula (A1) described in the above-mentioned WO 2022 / 138925. １５R is preferably an alkyl group, an aryl group, a halogen atom, an acyl group, an amino group, or an alkoxycarbonyl group. １５ The alkyl and aryl groups that can be taken as R ３ , R ５ and R ６ The descriptions of the alkyl and aryl groups that can be taken as R can be applied to each of them. １５ Examples of halogen atoms that can be taken as R include a chlorine atom, a bromine atom, and an iodine atom. １５ Examples of the acyl group that can be taken as R include an acetyl group, a propionyl group, and a butyroyl group. １５ The amino group that can be used as R ４ The description of the amino group that the substituted aryl group in R may have can be applied. Also preferred is a 5- to 7-membered nitrogen-containing heterocyclic group in which the alkyl group on the nitrogen atom of the amino group is bonded to form a ring. １５ The alkoxycarbonyl group which can be taken as the alkyl group is preferably an alkoxycarbonyl group having 2 to 5 carbon atoms, and examples thereof include methoxycarbonyl, ethoxycarbonyl, normal propoxycarbonyl, and isopropoxycarbonyl.

[0031] n is an integer of 0 to 4. There are no particular limitations on n, but it is preferably 0 or 1, for example.

[0032] Specific examples of the dye represented by general formula (A1) include the compounds described in

[0063] to

[0065] of WO 2022 / 138925. However, the present invention is not limited to these. In addition to the above specific examples, specific examples of the dye represented by any of general formulas (3) to (5) include the compounds described in

[0071] to

[0080] of WO 2021 / 132674. However, the present invention is not limited to these.

[0033] As the dye A, in addition to the coloring matter represented by general formula (A1), the compounds described in paragraphs 0012 to 0067 of JP-A No. 5-53241 and the compounds described in paragraphs 0011 to 0076 of Japanese Patent No. 2707371 can also be preferably used.

[0034] (Dye B, Dye C) Dye B is not particularly limited as long as it has a main absorption wavelength band in the wavelength range of 480 to 520 nm in the wavelength-selective absorption filter, and various dyes can be used. Dye C is not particularly limited as long as it has a main absorption wavelength band in the wavelength range of 580 to 620 nm in the wavelength-selective absorption filter, and various dyes can be used. The wavelength range in which dye B has a main absorption wavelength band is preferably 485 to 520 nm, more preferably 490 to 520 nm, and even more preferably 490 to 515 nm. The wavelength range in which dye C has a main absorption wavelength band is preferably 580 to 615 nm, more preferably 580 to 610 nm, and even more preferably 580 to 610 nm.

[0035] Specific examples of dye B include pyrrole methine (PM), rhodamine (RH), boron dipyrromethene (BODIPY), and squaraine (SQ) pigments (dyes). Specific examples of dye C include tetraazaporphyrin (TAP), squaraine, and cyanine (CY) pigments (dyes).

[0036] Among these, as the dyes B and C, squaraine dyes are preferred, and squaraine dyes represented by the following general formula (1) are more preferred, because they have sharp absorption waveforms in the main absorption wavelength band. By using dyes B and C with sharp absorption waveforms as described above, the above-mentioned relational expressions (I) and (II) can be satisfied at a preferred level, and the original color of the image of the OLED display device can be maintained at a superior level. That is, in the wavelength-selective absorption filter of the present invention, from the viewpoint of suppressing the above-mentioned color change, it is preferred that at least one of dyes B and C is a squaraine dye (preferably a squaraine dye represented by the following general formula (1)), and it is more preferred that both dyes B and C are squaraine dyes (preferably squaraine dyes represented by the following general formula (1)). In the present invention, in the dyes represented by the following general formulas, the cations are delocalized and multiple tautomeric structures exist. Therefore, in the present invention, when at least one tautomeric structure of a certain dye corresponds to each general formula, the certain dye is considered to be a dye represented by each general formula. Therefore, a dye represented by a specific general formula can also be said to be a dye having at least one tautomeric structure that can be represented by a specific general formula. In the present invention, the dye represented by a general formula may have any tautomeric structure as long as at least one of the tautomeric structures falls within this general formula.

[0037]

[0038] In general formula (1), A and B each independently represent an aryl group which may have a substituent, a heterocyclic group which may have a substituent, or -CH=G, where G represents a heterocyclic group which may have a substituent.

[0039] Unless otherwise specified, the definition and preferred range of each substituent in the general formula (1) are the same as those of the dye represented by the general formula (1) described in WO 2021 / 132674. Can be applied as is.

[0040] A preferred embodiment of the dye represented by the above general formula (1) is a dye represented by the following general formula (2).

[0041]

[0042] In general formula (2), A １ is the same as A in general formula (1). Among them, a nitrogen-containing five-membered heterocyclic group is preferred.

[0043] In general formula (2), R １ and R ２ R each independently represents a hydrogen atom or a substituent. １ and R ２ may be the same or different, and may be bonded to each other to form a ring. １ and R ２The substituents that can be adopted as the aryl group are not particularly limited, and examples thereof include alkyl groups (methyl groups, ethyl groups, propyl groups, isopropyl groups, butyl groups, t-butyl groups, isobutyl groups, pentyl groups, hexyl groups, octyl groups, dodecyl groups, trifluoromethyl groups, etc.), cycloalkyl groups (cyclopentyl groups, cyclohexyl groups, etc.), alkenyl groups (vinyl groups, allyl groups, etc.), alkynyl groups (ethynyl groups, propargyl groups, etc.), aryl groups (phenyl groups, naphthyl groups, etc.), heteroaryl groups (furyl groups, thienyl groups, pyridyl groups, pyridazyl groups, pyrimidyl groups, pyrazinyl groups, a phenyl group, a triazyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, a benzimidazolyl group, a benzoxazolyl group, a quinazolyl group, a phthalazyl group, etc.), a heterocyclic group (also called a heterocyclic group, for example, a pyrrolidyl group, an imidazolidyl group, a morpholyl group, an oxazolidyl group, etc.), an alkoxy group (a methoxy group, an ethoxy group, a propyloxy group, etc.), a cycloalkoxy group (a cyclopentyloxy group, a cyclohexyloxy group, etc.), an aryloxy group (a phenoxy group, a naphthyloxy group, etc.), a heteroaryloxy group (aromatic heterocyclic oxy group), an alkylthio group (methylthio group, ethylthio group, propylthio group, etc.), cycloalkylthio group (cyclopentylthio group, cyclohexylthio group, etc.), arylthio group (phenylthio group, naphthylthio group, etc.), heteroarylthio group (aromatic heterocyclic thio group), alkoxycarbonyl group (methyloxycarbonyl group, ethyloxycarbonyl group, butyloxycarbonyl group, octyloxycarbonyl group, etc.), aryloxycarbonyl group (phenyloxycarbonyl group, naphthyloxycarbonyl group, etc.), phosphoryl group (dimethoxyphosphonyl, diphenylphosphoryl ), sulfamoyl groups (aminosulfonyl groups, methylaminosulfonyl groups, dimethylaminosulfonyl groups, butylaminosulfonyl groups, cyclohexylaminosulfonyl groups, octylaminosulfonyl groups, phenylaminosulfonyl groups, 2-pyridylaminosulfonyl groups, etc.), acyl groups (acetyl groups, ethylcarbonyl groups, propylcarbonyl groups, cyclohexylcarbonyl groups, octylcarbonyl groups, 2-ethylhexylcarbonyl groups, phenylcarbonyl groups, naphthylcarbonyl groups, pyridylcarbonyl groups, etc.), acyloxy groups (acetyloxy groups,ethylcarbonyloxy group, butylcarbonyloxy group, octylcarbonyloxy group, phenylcarbonyloxy group, etc.), amide group (methylcarbonylamino group, ethylcarbonylamino group, dimethylcarbonylamino group, propylcarbonylamino group, pentylcarbonylamino group, cyclohexylcarbonylamino group, 2-ethylhexylcarbonylamino group, octylcarbonylamino group, dodecylcarbonylamino group, phenylcarbonylamino group, naphthylcarbonylamino group, etc.) , sulfonylamide groups (methylsulfonylamino groups, octylsulfonylamino groups, 2-ethylhexylsulfonylamino groups, trifluoromethylsulfonylamino groups, etc.), carbamoyl groups (aminocarbonyl groups, methylaminocarbonyl groups, dimethylaminocarbonyl groups, propylaminocarbonyl groups, pentylaminocarbonyl groups, cyclohexylaminocarbonyl groups, octylaminocarbonyl groups, 2-ethylhexylaminocarbonyl groups, dodecylaminocarbonyl groups, phenylaminocarbonyl groups, etc.), a carboxyl group, a naphthylaminocarbonyl group, a 2-pyridylaminocarbonyl group, etc.), a ureido group (a methylureido group, an ethylureido group, a pentylureido group, a cyclohexylureido group, an octylureido group, a dodecylureido group, a phenylureido group, a naphthylureido group, a 2-pyridylaminoureido group, etc.), an alkylsulfonyl group (a methylsulfonyl group, an ethylsulfonyl group, a butylsulfonyl group, a cyclohexylsulfonyl group, a 2-ethylhexylsulfonyl group, etc.), an arylsulfonyl group Examples of such groups include alkyl groups (phenylsulfonyl group, naphthylsulfonyl group, 2-pyridylsulfonyl group, etc.), amino groups (amino group, ethylamino group, dimethylamino group, butylamino group, dibutylamino group, cyclopentylamino group, 2-ethylhexylamino group, dodecylamino group, anilino group, naphthylamino group, 2-pyridylamino group, etc.), alkylsulfonyloxy groups (methanesulfonyloxy), cyano group, nitro group, halogen atoms (fluorine atom, chlorine atom, bromine atom, etc.), and hydroxy groups. Among these, alkyl groups, alkenyl groups, aryl groups, and heteroaryl groups are preferred, alkyl groups, aryl groups, and heteroaryl groups are more preferred, and alkyl groups are even more preferred.

[0044] R １ and R ２ The substituent that can be taken as R may further have a substituent. １ and R ２ Examples of the substituents that can be taken as R include the above-mentioned substituents. １ and R ２ means each other or B ２ or B ３ may bond with a substituent that the aryl group has to form a ring. The ring formed in this case is preferably a heterocyclic ring or a heteroaryl ring, and the size of the ring formed is not particularly limited, but is preferably a 5- or 6-membered ring.

[0045] In the general formula (2), B １ , B ２ , B ３ and B ４ each independently represents a carbon atom or a nitrogen atom. １ , B ２ , B ３ and B ４ The ring containing B is an aromatic ring. １ ~B ４ Among these, at least two are preferably carbon atoms, and B １ ~B ４ It is more preferable that all of B are carbon atoms. １ ~B ４ The carbon atom which can be represented by B has a hydrogen atom or a substituent. １ ~B ４ The number of carbon atoms having a substituent among the carbon atoms that can be taken as B is not particularly limited, but is preferably 0, 1 or 2, and more preferably 1. １ and B ４ is a carbon atom, and at least one of them preferably has a substituent. １ ~B ４ The substituents that can be taken by the carbon atom as R are not particularly limited, and １ and R ２Among these, preferred are an alkyl group, an alkoxy group, an alkoxycarbonyl group, an aryl group, an acyl group, an amido group, a sulfonylamido group, a carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group, an amino group, a cyano group, a nitro group, a halogen atom, or a hydroxy group, and more preferred are an alkyl group, an alkoxy group, an alkoxycarbonyl group, an aryl group, an acyl group, an amido group, a sulfonylamido group, a carbamoyl group, an amino group, a cyano group, a nitro group, a halogen atom, or a hydroxy group.

[0046] B １ and B ４ The substituent that the carbon atom may have is more preferably an alkyl group, an alkoxy group, a hydroxy group, an amide group, a sulfonylamido group, or a carbamoyl group, particularly preferably an alkyl group, an alkoxy group, a hydroxy group, an amide group, or a sulfonylamido group, and most preferably a hydroxy group, an amide group, or a sulfonylamido group. ２ and B ３ The substituent that the carbon atom may have is more preferably an alkyl group, an alkoxy group, an alkoxycarbonyl group, an acyl group, an amino group, a cyano group, a nitro group, or a halogen atom, and it is particularly preferred that either one of the substituents is an electron-withdrawing group (for example, an alkoxycarbonyl group, an acyl group, a cyano group, a nitro group, or a halogen atom).

[0047] The dye represented by the above general formula (2) is preferably a dye represented by any one of the following general formulas (3), (4) and (5).

[0048]

[0049] In general formula (3), R １ and R ２ each independently represents a hydrogen atom or a substituent, and R １ and R ２ In general formula (3), B has the same meaning as B, and the preferred range is also the same. １ ~B ４each independently represents a carbon atom or a nitrogen atom, and B in the general formula (2) １ ~B ４ The same definition and preferred range are also the same.

[0050] In general formula (3), R ３ and R ４ R each independently represents a hydrogen atom or a substituent. ３ and R ４ The substituents that can be adopted as R １ and R ２ The substituents that can be used as R ３ The substituent that can be taken as R is preferably an alkyl group, an alkoxy group, an amino group, an amido group, a sulfonylamido group, a cyano group, a nitro group, an aryl group, a heteroaryl group, a heterocyclic group, an alkoxycarbonyl group, a carbamoyl group or a halogen atom, more preferably an alkyl group, an aryl group or an amino group, and even more preferably an alkyl group. ４ The substituent that can be taken as aryl is preferably an alkyl group, an aryl group, a heteroaryl group, a heterocyclic group, an alkoxy group, an alkoxycarbonyl group, an acyl group, an acyloxy group, an amido group, a carbamoyl group, an amino group, or a cyano group, more preferably an alkyl group, an alkoxycarbonyl group, an acyl group, a carbamoyl group, or an aryl group, and still more preferably an alkyl group.

[0051] R ３ and R ４ The alkyl group may be linear, branched, or cyclic, but is preferably linear or branched. The number of carbon atoms in the alkyl group is preferably 1 to 12, and more preferably 1 to 8. Preferred examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, a t-butyl group, a 2-ethylhexyl group, and a cyclohexyl group, and more preferably a methyl group or a t-butyl group.

[0052]

[0053] In general formula (4), R １ and R ２each independently represents a hydrogen atom or a substituent, and R １ and R ２ In general formula (4), B has the same meaning as B, and the preferred range is also the same. １ ~B ４ each independently represents a carbon atom or a nitrogen atom, and B in the general formula (2) １ ~B ４ The same definition and preferred range are also the same.

[0054] In general formula (4), R ５ and R ６ R each independently represents a hydrogen atom or a substituent. ５ and R ６ The substituents that can be adopted as R １ and R ２ The substituents that can be used as R ５ The substituent that can be taken as R is preferably an alkyl group, an alkoxy group, an aryloxy group, an amino group, a cyano group, an aryl group, a heteroaryl group, a heterocyclic group, an acyl group, an acyloxy group, an amido group, a sulfonylamido group, a ureido group, or a carbamoyl group, more preferably an alkyl group, an alkoxy group, an acyl group, an amido group, or an amino group, and still more preferably an alkyl group. ５ The alkyl group that can be taken as is R ３ The preferred ranges are also the same as those of the alkyl groups that can be taken as above.

[0055] In general formula (4), R ６ The substituent that can be taken as R is preferably an alkyl group, an alkenyl group, an aryl group, a heteroaryl group, a heterocyclic group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an alkoxycarbonyl group, an acyl group, an acyloxy group, an amido group, a sulfonylamido group, an alkylsulfonyl group, an arylsulfonyl group, a carbamoyl group, an amino group, a cyano group, a nitro group, or a halogen atom, more preferably an alkyl group, an aryl group, a heteroaryl group, or a heterocyclic group, and even more preferably an alkyl group or an aryl group. ６ The alkyl group that can be taken as is R４ The meanings and preferred ranges of the alkyl groups are the same as those of the alkyl groups that can be taken as R ６ The aryl group that can be taken as (R) is preferably an aryl group having 6 to 12 carbon atoms, and more preferably a phenyl group. This aryl group may have a substituent, and examples of such a substituent include groups included in the following substituent group A, with alkyl groups having 1 to 10 carbon atoms, sulfonyl groups, amino groups, acylamino groups, sulfonylamino groups, and the like being particularly preferred. These substituents may further have a substituent. Specifically, the substituent is preferably an alkylsulfonylamino group.

[0056] - Substituent Group A - A halogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, a cyano group, a hydroxy group, a nitro group, a carboxy group, an alkoxy group, an aminooxy group, an aryloxy group, a silyloxy group, a heterocyclic oxy group, an acyloxy group, a carbamoyloxy group, an amino group, an acylamino group, an aminocarbonylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfamoylamino group, a sulfonylamino group (including an alkyl or arylsulfonylamino group), a mercapto group, an alkylthio group, an arylthio group, a heterocyclic thio group, a sulfamoyl group, a sulfo group, an alkyl or arylsulfinyl group, a sulfonyl group (including an alkyl or arylsulfonyl group), an acyl group, an aryloxycarbonyl group, an alkoxycarbonyl group, a carbamoyl group, an aryl or heterocyclic azo group, an imido group, a phosphino group, a phosphinyl group, a phosphinyloxy group, a phosphinylamino group, a silyl group, and the like.

[0057]

[0058] In general formula (5), R １ and R ２ each independently represents a hydrogen atom or a substituent, and R １ and R ２ In general formula (5), B has the same meaning as B, and the preferred range is also the same. １ ~B ４ each independently represents a carbon atom or a nitrogen atom, and B in the general formula (2)１ ~B ４ The same definition and preferred range are also the same.

[0059] In general formula (5), R ７ and R ８ R each independently represents a hydrogen atom or a substituent. ７ and R ８ The substituents that can be adopted as R １ and R ２ The substituents that can be used as R ７ The preferred range, more preferred range, and even more preferred range of the substituents that can be taken as R in general formula (4) are ５ The substituents are the same as those that can be taken as R ５ The alkyl group that can be taken as R ３ The preferred ranges are also the same as those of the alkyl groups that can be taken as above.

[0060] In general formula (5), R ８ The preferred range, more preferred range, and even more preferred range of the substituents that can be taken as R in general formula (4) are ６ The substituents are the same as those that can be taken as R ８ The preferred range of alkyl groups and aryl groups that can be taken as R in the above general formula (4) is ６ The meanings and preferred ranges of the alkyl and aryl groups are the same as those of the alkyl and aryl groups that can be taken as the above.

[0061] The squaraine dye may be any squaraine dye represented by any of general formulas (1) to (5) without any particular limitation. Examples thereof include the compounds described in JP-A-2006-160618, WO-A-2004 / 005981, WO-A-2004 / 007447, Dyes and Pigment, 2001, 49, pp. 161-179, WO-A-2008 / 090757, WO-A-2005 / 121098, and JP-A-2008-275726.

[0062] Specific examples of the dyes represented by any of the general formulas (1) to (5) include the compounds described in

[0067] to

[0070] of WO 2021 / 132674. However, the present invention is not limited to these. In addition to the above specific examples, specific examples of the dyes represented by any of the general formulas (3) to (5) include the compounds described in

[0071] to

[0080] of WO 2021 / 132674. However, the present invention is not limited to these.

[0063] A preferred embodiment of the dye represented by the above general formula (1) is a dye represented by the following general formula (6).

[0064]

[0065] In general formula (6), R ３ and R ４ each independently represents a hydrogen atom or a substituent, and R in the above general formula (3) ３ and R ４ In general formula (6), A has the same meaning as A, and the preferred meanings are also the same. ２ is the same as A in general formula (1). Among them, a nitrogen-containing five-membered heterocyclic group is preferred.

[0066] The dye represented by the above general formula (6) is preferably a dye represented by any one of the following general formulas (7), (8) and (9).

[0067]

[0068] In general formula (7), R ３ and R ４ each independently represents a hydrogen atom or a substituent, and R in the above general formula (3) ３ and R ４ The two R ３ and two R ４ may be the same or different.

[0069]

[0070] In general formula (8), R ３ and R ４each independently represents a hydrogen atom or a substituent, and R in the above general formula (3) ３ In general formula (8), R ５ and R ６ each independently represents a hydrogen atom or a substituent, and R in the above general formula (4) ５ and R ６ The same definition and preferred range are also the same.

[0071]

[0072] In general formula (9), R ３ and R ４ each independently represents a hydrogen atom or a substituent, and R in the above general formula (3) ３ In general formula (9), R ７ and R ８ each independently represents a hydrogen atom or a substituent, and R in the above general formula (5) ７ and R ８ The same definition and preferred range are also the same.

[0073] In the present invention, when a squaraine dye is used as dye B, the squaraine dye can be any squaraine dye represented by any of the general formulas (6) to (9) and can be used without particular limitation. Examples thereof include the compounds described in JP-A-2002-97383 and JP-A-2015-68945. Specific examples of squaraine dyes represented by any of the general formulas (6) to (9) include the compounds described in

[0091] to

[0095] of WO 2021 / 132674. However, the present invention is not limited thereto.

[0074] (Quencher-Incorporated Dye) The squaraine dye represented by the general formula (1) above may be a quencher-incorporated dye in which a quencher moiety is covalently linked to the dye via a linking group. The quencher-incorporated dye can also be preferably used as at least one of dyes B and C. That is, the quencher-incorporated dye is counted as dye B or dye C depending on the wavelength of its main absorption wavelength band. Examples of the quencher moiety include the ferrocenyl group in the substituent X described above. Other examples include the quencher moiety in the quencher compounds described in paragraphs

[0199] to

[0212] and paragraphs

[0234] to

[0310] of WO 2019 / 066043.

[0075] Among the squaraine dyes represented by general formula (1), specific examples of dyes that are quencher-containing dyes include the compounds described in paragraphs

[0097] to

[0114] of WO 2021 / 132674. However, the present invention is not limited to these.

[0076] (Dye D) The dye D is not particularly limited as long as it has a main absorption wavelength band in the wavelength range of 680 to 780 nm in the wavelength selective absorption filter, and various dyes can be used. Specific examples of dye D include porphyrin-based, squaraine-based, and cyanine (CY)-based pigments (dyes). The wavelength range in which dye D has a main absorption wavelength band is preferably 680 to 760 nm, more preferably 680 to 740 nm, and even more preferably 680 to 720 nm.

[0077] The dye D is preferably at least one of the dyes represented by the following general formula (D1) and the dyes represented by the above general formula (1), since the absorption waveform is sharp.

[0078] (Dye represented by general formula (D1))

[0079] In formula (D1), R １ and R ２ each independently represents a substituent, R ３ ~R ６ each independently represents a hydrogen atom or a substituent, R３ and R ４ , R ５ and R ６ may be bonded to each other to form a ring, and X １ and X ２ each independently represents a hydrogen atom or a substituent.

[0080] With regard to the definition and preferred range of each substituent in general formula (D1), unless otherwise specified, the descriptions regarding each substituent of the dye represented by general formula (D1) described in WO 2021 / 14973 can be applied as they are.

[0081] The dye represented by the above general formula (D1) is preferably a dye represented by the following general formula (D2).

[0082]

[0083] In formula (D2), R １ａ and R ２ａ each independently represents a substituent, R ３ａ ~R ６ａ each independently represents a hydrogen atom or a substituent, R ３ａ and R ４ａ , R ５ａ and R ６ａ may be bonded to each other to form a ring, and X １ａ and X ２ａ are each independently a hydrogen atom or -BR ２１ａ R ２２ａ represents R ２１ａ and R ２２ａ each independently represents a substituent, R ２１ａ and R ２２ａ may be bonded to each other to form a ring. １ａ ~R ６ａ , X １ａ , X ２ａ , R ２１ａ and R ２２ａ are R in the above formula (D1), respectively. １ ~R ６ , X １ , X ２ , R ２１ and R ２２The same applies to the preferred range.

[0084] The dye represented by the above general formula (D1) is more preferably a dye represented by the following general formula (D3).

[0085]

[0086] In formula (D3), R １ｂ and R ２ｂ each independently represents a branched alkyl group, R ３ｂ ~R ６ｂ each independently represents a hydrogen atom or a substituent, R ３ｂ and R ４ｂ , R ５ｂ and R ６ｂ may be bonded to each other to form a ring, and R ２１ｂ and R ２２ ｂ each independently represents a substituent, R ２１ｂ and R ２２ｂ may be bonded to form a ring.

[0087] R １ｂ and R ２ｂ R each independently represents a branched alkyl group. The number of carbon atoms is preferably 3 to 40. The lower limit is, for example, more preferably 5 or more, even more preferably 8 or more, and still more preferably 10 or more. The upper limit is more preferably 35 or less, and even more preferably 30 or less. The number of branches in the branched alkyl group is preferably 2 to 10, and more preferably 2 to 8. R ３ｂ ~R ６ｂ , R ２１ｂ and R ２２ｂ are R in the above formula (D1), respectively. ３ ~R ６ , R ２１ and R ２２ The same definition and preferred range are also the same. ３ｂ ~R ６ｂ is R ３ｂ and R ４ｂ one of which is an electron-withdrawing group and the other is a heteroaryl group, and R ５ｂ and R ６ｂA combination in which one of R is an electron-withdrawing group and the other is a heteroaryl group is preferred. The electron-withdrawing group is preferably a cyano group. ２１ｂ and R ２２ｂ are each independently preferably a halogen atom, an alkyl group, an alkoxy group, an aryl group or a heteroaryl group, more preferably a halogen atom, an aryl group or an aryl group, and even more preferably an aryl group.

[0088] Specific examples of the dye represented by general formula (D1) include the compounds described in paragraphs

[0189] to

[0197] of WO 2021 / 14973, although the present invention is not limited thereto.

[0089] (Dye Represented by General Formula (1)) When dye D is a dye represented by the above-mentioned general formula (1), it is also preferable that it is a dye represented by the following general formula (14).

[0090]

[0091] In general formula (14), R １ and R ２ R each independently represents a hydrogen atom or a substituent. １ and R ２ may be the same or different, and may be bonded to each other to form a ring. １ and R ２ The substituent that can be taken as is not particularly limited, and examples thereof include the alkyl group (including a cycloalkyl group), alkenyl group, alkynyl group, aryl group, heterocyclic group (including an aromatic heterocyclic group and an aliphatic heterocyclic group), alkoxy group, cycloalkoxy group, aryloxy group, heteroaryloxy group, alkylthio group, cycloalkylthio group, arylthio group, heteroarylthio group, alkoxycarbonyl group, aryloxycarbonyl group, phosphoryl group, sulfamoyl group, acyl group, acyloxy group, amido group, sulfonylamido group, carbamoyl group, ureido group, alkylsulfonyl group, arylsulfonyl group, amino group, alkylsulfonyloxy group, cyano group, nitro group, halogen atom, and hydroxy group in the above-mentioned substituent X. ４１ and R４２ Also, the above R １ and R ２ It is synonymous with R １ , R ２ , R ４１ and R ４２ may further have a substituent. Examples of the substituent that may further have include the substituent X described above.

[0092] R １ , R ２ , R ４１ and R ４２ Among these, alkyl groups, alkenyl groups, aryl groups, and heteroaryl groups are preferred, alkyl groups, aryl groups, and heteroaryl groups are more preferred, and alkyl groups and aryl groups are even more preferred.

[0093] B in general formula (14) １ , B ２ , B ３ and B ４ each independently represents a carbon atom or a nitrogen atom. １ , B ２ , B ３ and B ４ The ring containing B is an aromatic ring. １ ~B ４ Among these, at least two are preferably carbon atoms, and B １ ~B ４ It is more preferable that all of B are carbon atoms. １ ~B ４ The carbon atom which can be represented by B has a hydrogen atom or a substituent. １ ~B ４ The number of carbon atoms having a substituent among the carbon atoms that can be taken as B is not particularly limited, but is preferably 0, 1 or 2, and more preferably 1. １ and B ４ is a carbon atom, and at least one of them preferably has a substituent. １ ~B ４ The substituents that can be taken by the carbon atom as R are not particularly limited, and １ and R ２Among these, preferred are alkyl groups, alkoxy groups, alkoxycarbonyl groups, aryl groups, acyl groups, amide groups, sulfonylamido groups, carbamoyl groups, alkylsulfonyl groups, arylsulfonyl groups, amino groups, cyano groups, nitro groups, halogen atoms, and hydroxy groups, and more preferred are alkyl groups, alkoxy groups, alkoxycarbonyl groups, aryl groups, acyl groups, amide groups, sulfonylamido groups, carbamoyl groups, amino groups, cyano groups, nitro groups, halogen atoms, and hydroxy groups. ５ , B ６ , B ７ and B ８ are the above B １ , B ２ , B ３ and B ４ It is synonymous with B. １ ~B ８ The substituent that the carbon atom may have may further have a substituent. Examples of the further substituent that may be had include the substituent X described above.

[0094] B １ , B ４ , B ５ and B ８ The substituent that the carbon atom may have is more preferably an alkyl group, an alkoxy group, a hydroxy group, an amide group, a sulfonylamido group, or a carbamoyl group, particularly preferably an alkyl group, an alkoxy group, a hydroxy group, an amide group, or a sulfonylamido group, and most preferably a hydroxy group, an amide group, or a sulfonylamido group. ２ , B ３ , B ６ and B ７ The substituent that the carbon atom may have is more preferably an alkyl group, an alkoxy group, an alkoxycarbonyl group, an acyl group, an amino group, a cyano group, a nitro group, or a halogen atom, and it is particularly preferred that either one of the substituents is an electron-withdrawing group (for example, an alkoxycarbonyl group, an acyl group, a cyano group, a nitro group, or a halogen atom).

[0095] In general formula (14), R １and R ２ may be bonded to each other to form a ring, and R １ or R ２ And B ２ or B ３ may be bonded to the substituents of R to form a ring. ４１ and R ４２ may be bonded to each other to form a ring, and R ４１ or R ４２ And B ６ or B ７ may bond with the substituents possessed by R to form a ring. In the above, the ring formed is preferably a hetero ring or a heteroaryl ring, and the size of the ring formed is not particularly limited, but it is preferably a 5-membered or 6-membered ring. In addition, the number of rings formed is not particularly limited, and may be one or two or more. Examples of the form in which two or more rings are formed include, for example, R １ and B ２ The substituents of and R ２ and B ３ and the substituents possessed by each of the groups may be bonded to form two rings.

[0096] Specific examples of dyes D represented by formula (1) are shown below, but the present invention is not limited to these.

[0097]

[0098]

[0099]

[0100] The total content of the dyes A to D in the wavelength-selective absorption filter of the present invention is preferably 1.0% by mass or more, more preferably 1.5% by mass or more, even more preferably 2.0% by mass or more, particularly preferably 2.5% by mass or more, and especially preferably 3.0% by mass or more. When the total content of the dyes A to D in the wavelength-selective absorption filter is equal to or greater than the above-mentioned preferable lower limit, a good anti-reflection effect can be obtained. Furthermore, the total content of the dyes A to D in the wavelength-selective absorption filter is usually 50% by mass or less, preferably 40% by mass or less, more preferably 30% by mass or less, even more preferably 15% by mass or less, and especially preferably 10% by mass or less. That is, the total content of the dyes A to D in the wavelength-selective absorption filter of the present invention is preferably 1.0 to 50% by mass, more preferably 1.5 to 40% by mass, even more preferably 2.0 to 30% by mass, particularly preferably 2.5 to 15% by mass, and especially preferably 3.0 to 10% by mass.

[0101] With regard to the contents of each dye in the wavelength-selective absorption filter of the present invention, the content of dye B is preferably 0.01 to 45% by mass, more preferably 0.1 to 30% by mass, and even more preferably 0.1 to 10% by mass. The content of dye C is preferably 0.01 to 45% by mass, more preferably 0.1 to 30% by mass, and even more preferably 0.5 to 15% by mass. The content of dye D is preferably 0.05 to 50% by mass, more preferably 0.2 to 20% by mass, and even more preferably 0.2 to 10% by mass. When the wavelength-selective absorption filter of the present invention contains dye A, the content of dye A in the wavelength-selective absorption filter is preferably 0.01 to 45% by mass, more preferably 0.1 to 30% by mass, and even more preferably 0.1 to 10% by mass. The content ratio of the dyes A to D in the wavelength selective absorption filter is, in mass ratio, preferably dye A:dye B:dye C:dye D=0-5:0.1-2:1:0.1-5, and more preferably 0-2:0.1-1:1:0.1-2.

[0102] When at least one of dyes B and C is a dye containing a quencher, the content of the dye containing a quencher in the light-absorbing filter of the present invention is preferably 0.1% by mass or more from the viewpoint of antireflection effect. The upper limit is preferably 45% by mass or less. That is, the content is preferably 0.1 to 45% by mass in the wavelength-selective absorption filter of the present invention.

[0103] <Resin> The resin contained in the wavelength-selective absorption filter of the present invention (hereinafter also referred to as "resin used in the present invention" or "matrix resin") is not particularly limited as long as it can disperse (preferably dissolve) dyes including dyes B to D, can satisfactorily suppress external light reflection and brightness reduction, and can maintain the original color of the image of the OLED display device at an excellent level. When at least one of dyes B and C is a squaraine dye represented by general formula (1), the matrix resin is preferably a low-polarity matrix resin that allows this squaraine dye to exhibit sharper absorption. By the squaraine dye exhibiting sharper absorption, the above-mentioned relational expressions (I) and (II) can be satisfied at a preferred level, and the original color of the image of the OLED display device can be maintained at an excellent level. Here, low polarity preferably means that the fd value defined by the following relational expression α described in

[0130] of WO 2022 / 138925 is 0.50 or more. Relational formula α: fd = δd / (δd + δp + δh) In the relational formula α, δd, δp, and δh represent the term corresponding to the London dispersion force, the term corresponding to the dipole-dipole force, and the term corresponding to the hydrogen bonding force, respectively, relative to the solubility parameter δt calculated by the Hoy method. Specific calculation methods are as described in paragraphs

[0131] to

[0133] of International Publication No. 2022 / 138925. That is, fd represents the ratio of δd to the sum of δd, δp, and δh. By setting the fd value to 0.50 or more, a sharper absorption waveform is more easily obtained. Furthermore, when the wavelength-selective absorption filter contains two or more matrix resins, the fd value is calculated as follows: fd = Σ (wi fdi) Here, wi represents the mass fraction of the i-th matrix resin, and fdi represents the fd value of the i-th matrix resin.

[0104] Furthermore, if the matrix resin is a resin exhibiting a certain degree of hydrophobicity, the water content of the wavelength-selective absorption filter of the present invention can be made low, for example, 0.5% or less, which is preferable from the viewpoint of improving the light resistance of the wavelength-selective absorption filter. Note that the resin may contain any conventional component in addition to the polymer. However, the fd of the matrix resin is a calculated value for the polymer that constitutes the matrix resin.

[0105] Preferred examples of resins used in the present invention include polystyrene resins and cyclic polyolefin resins, with cyclic polyolefin resins being more preferred. Typically, the fd value of polystyrene resins is 0.45 to 0.60, while the fd value of cyclic polyolefin resins is 0.45 to 0.70. As mentioned above, it is preferable to use resins with an fd value of 0.50 or greater. In addition to these preferred resins, it is also preferable to use resin components that impart functionality to the wavelength-selective absorption filter, such as the below-described tensile resin component and release property-controlling resin component. In other words, in the present invention, the term "matrix resin" is used to include not only the above-mentioned resins but also the tensile resin component and release property-controlling resin component. It is preferable that the resin used in the present invention contains a cyclic polyolefin resin in terms of sharpening the absorption waveform of the dye.

[0106] (Polystyrene Resin) The polystyrene contained in the polystyrene resin refers to a polymer containing a styrene component. The polystyrene preferably contains 50% by mass or more of the styrene component. The wavelength-selective absorption filter of the present invention may contain one type of polystyrene or two or more types of polystyrene. Here, the styrene component is a structural unit derived from a monomer having a styrene skeleton in its structure. In order to control the photoelastic coefficient and hygroscopicity to values ​​within a preferred range for a wavelength-selective absorption filter, the polystyrene more preferably contains 70% by mass or more of the styrene component, and even more preferably contains 85% by mass or more. It is also preferable that the polystyrene is composed only of the styrene component.

[0107] Among polystyrenes, polystyrenes composed solely of a styrene component include homopolymers of styrene compounds and copolymers of two or more styrene compounds. Here, the term "styrene compound" refers to a compound having a styrene skeleton in its structure, and includes not only styrene but also compounds into which a substituent has been introduced to the extent that the ethylenically unsaturated bond of styrene can function as a reactive (polymerizable) group. Specific styrene compounds include, for example, styrene; alkylstyrenes such as α-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, 3,5-dimethylstyrene, 2,4-dimethylstyrene, o-ethylstyrene, p-ethylstyrene, and tert-butylstyrene; and substituted styrenes in which a hydroxyl group, an alkoxy group, a carboxyl group, a halogen atom, or the like has been introduced into the benzene nucleus of styrene, such as hydroxystyrene, tert-butoxystyrene, vinylbenzoic acid, o-chlorostyrene, and p-chlorostyrene. Among these, from the standpoints of availability and material cost, the polystyrene used in the present invention is preferably a homopolymer of styrene (i.e., polystyrene).

[0108] Furthermore, the constituent components other than the styrene component that may be contained in the polystyrene are not particularly limited. That is, the polystyrene may be a styrene-diene copolymer, a styrene-polymerizable unsaturated carboxylic acid ester copolymer, or the like. A mixture of polystyrene and synthetic rubber (e.g., polybutadiene and polyisoprene) can also be used. High-impact polystyrene (HIPS) obtained by graft-polymerizing styrene onto synthetic rubber is also preferred. Also preferred is polystyrene obtained by dispersing a rubber-like elastomer in a continuous phase of a polymer containing a styrene component (e.g., a copolymer of a styrene component and a (meth)acrylic acid ester component) and graft-polymerizing the copolymer onto the rubber-like elastomer (graft-type high-impact polystyrene, referred to as "graft HIPS"). Furthermore, so-called styrene-based elastomers can also be suitably used. The polystyrene may also be hydrogenated (hydrogenated polystyrene). The hydrogenated polystyrene is not particularly limited, but hydrogenated styrene-diene copolymers such as hydrogenated styrene-butadiene-styrene block copolymer (SEBS) obtained by hydrogenating SBS (styrene-butadiene-styrene block copolymer) and hydrogenated styrene-isoprene-styrene block copolymer (SEPS) obtained by hydrogenating SIS (styrene-isoprene-styrene block copolymer) are preferred. Only one type of hydrogenated polystyrene may be used, or two or more types may be used. Furthermore, the polystyrene may be modified polystyrene. The modified polystyrene is not particularly limited, but examples thereof include polystyrene into which a reactive group such as a polar group has been introduced. Specific examples thereof include acid-modified polystyrene such as maleic acid-modified polystyrene and epoxy-modified polystyrene.

[0109] As the polystyrene, multiple types of polystyrenes with different compositions, molecular weights, etc. can be used in combination. Polystyrene-based resins can be obtained by conventional methods such as anionic, bulk, suspension, emulsion, or solution polymerization. In addition, in polystyrene, at least a portion of the unsaturated double bonds in the benzene rings of the conjugated diene and styrene monomer may be hydrogenated. The hydrogenation rate can be measured by nuclear magnetic resonance (NMR) spectroscopy.

[0110] As the polystyrene resin, commercially available products may be used, for example, "CLEAREN 530L" and "CLEAREN 730L" manufactured by Denki Kagaku Kogyo Co., Ltd., "TUFPREN 126S" and "ASAPRENE T411" manufactured by Asahi Kasei Corporation, "KRATON D1102A" and "KRATON D1116A" manufactured by Kraton Polymers Japan, "STYROLUX S" and "STYROLUX T" manufactured by Styrolusion, "Asaflex 840" and "Asaflex 860" manufactured by Asahi Kasei Chemicals Corporation (SBS), "679", "HF77", and "SGP-10" manufactured by PS Japan, "DIC STYRENE XC-515" and "DIC STYRENE XC-535" manufactured by DIC Corporation (GPPS), "475D", "H0103", and "HT478" manufactured by PS Japan, and "DIC STYRENE" manufactured by DIC. GH-8300-5 (both collectively referred to as HIPS). Examples of hydrogenated polystyrene resins include the "Tuftec H Series" manufactured by Asahi Kasei Chemicals Corporation, the "Kraton G Series" manufactured by Shell Japan (both collectively referred to as SEBS), the "Dynaron" (hydrogenated styrene-butadiene random copolymer) manufactured by JSR Corporation, and the "Septon" (SEPS) manufactured by Kuraray Co., Ltd. Examples of modified polystyrene resins include the "Tuftec M Series" manufactured by Asahi Kasei Chemicals Corporation, the "Epofriend" manufactured by Daicel Corporation, the "Polar Group Modified Dynaron" manufactured by JSR Corporation, and the "Reseda" manufactured by Toagosei Co., Ltd.

[0111] The wavelength-selective absorption filter of the present invention preferably contains a polyphenylene ether resin in addition to the polystyrene resin. By incorporating both a polystyrene resin and a polyphenylene ether resin, the toughness of the wavelength-selective absorption filter can be improved, and the occurrence of defects such as cracks can be suppressed even in harsh environments such as high temperature and high humidity. As the polyphenylene ether resin, Zylon S201A, S202A, S203A, etc. manufactured by Asahi Kasei Corporation can be preferably used. Alternatively, a resin prepared by pre-mixing polystyrene resin and polyphenylene ether resin can be used. As a mixed resin of polystyrene resin and polyphenylene ether resin, for example, Zylon 1002H, 1000H, 600H, 500H, 400H, 300H, 200H, etc. manufactured by Asahi Kasei Corporation can be preferably used. When the wavelength-selective absorption filter of the present invention contains a polystyrene resin and a polyphenylene ether resin, the mass ratio of the two, polystyrene resin / polyphenylene ether resin, is preferably 99 / 1 to 50 / 50, more preferably 98 / 2 to 60 / 40, and even more preferably 95 / 5 to 70 / 30. By setting the blending ratio of the polyphenylene ether resin within the above-mentioned preferred range, the wavelength-selective absorption filter has sufficient toughness, and when solution-formed, the solvent can be appropriately volatilized.

[0112] (Cyclic Polyolefin Resin) The cyclic olefin compound forming the cyclic polyolefin contained in the cyclic polyolefin resin is not particularly limited as long as it is a compound having a ring structure containing a carbon-carbon double bond, and examples thereof include norbornene compounds, monocyclic olefin compounds other than norbornene compounds, cyclic conjugated diene compounds, and vinyl alicyclic hydrocarbon compounds. Examples of cyclic polyolefins include (1) polymers containing structural units derived from norbornene compounds, (2) polymers containing structural units derived from monocyclic olefin compounds other than norbornene compounds, (3) polymers containing structural units derived from cyclic conjugated diene compounds, (4) polymers containing structural units derived from vinyl alicyclic hydrocarbon compounds, and hydrogenated polymers containing structural units derived from each of the compounds (1) to (4). In the present invention, polymers containing structural units derived from norbornene compounds and polymers containing structural units derived from monocyclic olefin compounds include ring-opened polymers of each compound.

[0113] The cyclic polyolefin is not particularly limited, but is preferably a polymer having a structural unit derived from a norbornene compound, represented by the following general formula (A-II) or (A-III): The polymer having the structural unit represented by the following general formula (A-II) is an addition polymer of a norbornene compound, and the polymer having the structural unit represented by the following general formula (A-III) is a ring-opening polymer of a norbornene compound.

[0114]

[0115] In general formulas (A-II) and (A-III), m is an integer of 0 to 4, preferably 0 or 1. In general formulas (A-II) and (A-III), R ３ ~R ６ are each independently a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms. In the present invention, the hydrocarbon group is not particularly limited as long as it is a group consisting of carbon atoms and hydrogen atoms, and examples thereof include alkyl groups, alkenyl groups, alkynyl groups, and aryl groups (aromatic hydrocarbon groups). Among these, alkyl groups and aryl groups are preferred. In general formulas (A-II) and (A-III), X ２ and X ３, Y ２ and Y ３ each independently represents a hydrogen atom, a hydrocarbon group having 1 to 10 carbon atoms, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms substituted with a halogen atom, -(CH ２ ) ｎ COOR １１ , -(CH ２ ) ｎ OCOR １２ , -(CH ２ ) ｎ NCO, -(CH ２ ) ｎ NO ２ , -(CH ２ ) ｎ CN, -(CH ２ ) ｎ CONR １３ R １４ , -(CH ２ ) ｎ NR １３ R １４ , -(CH ２ ) ｎ OZ or -(CH ２ ) ｎ W or X ２ and Y ２ or X ３ and Y ３ are bonded to each other to form (-CO) ２ O or (-CO) ２ NR １５ where R １１ ~R １５ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms; Z represents a hydrocarbon group or a hydrocarbon group substituted with a halogen; W represents Si(R １６ ) ｐ D （３－ｐ） (R １６ represents a hydrocarbon group having 1 to 10 carbon atoms, D represents a halogen atom, -OCOR １７ Or -OR １７ (R １７ represents a hydrocarbon group having 1 to 10 carbon atoms. p represents an integer of 0 to 3. n represents an integer of 0 to 10, preferably 0 to 8, and more preferably 0 to 6.

[0116] In general formulae (A-II) and (A-III), R３ ~R ６ are each a hydrogen atom or —CH ３ is preferable, and from the viewpoint of moisture permeability, it is more preferable that X is a hydrogen atom. ２ and X ３ are hydrogen atoms, -CH ３ or -C ２ H ５ is preferred, and a hydrogen atom is more preferred in terms of moisture permeability. ２ and Y ３ are each a hydrogen atom, a halogen atom (particularly a chlorine atom), or —(CH ２ ) ｎ COOR １１ (Especially -COOCH ３ ) is preferred, and a hydrogen atom is more preferred in terms of moisture permeability. The other groups are appropriately selected.

[0117] The polymer having the structural unit represented by general formula (A-II) or (A-III) may further contain at least one structural unit represented by the following general formula (AI).

[0118]

[0119] In general formula (AI), R １ and R ２ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms; X １ and Y １ each independently represents a hydrogen atom, a hydrocarbon group having 1 to 10 carbon atoms, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms substituted with a halogen atom, -(CH ２ ) ｎ COOR １１ , -(CH ２ ) ｎ OCOR １２ , -(CH ２ ) ｎ NCO, -(CH ２ ) ｎ NO ２ , -(CH ２ ) ｎ CN, -(CH ２ ) ｎ CONR １３ R １４ , -(CH ２ )ｎ NR １３ R １４ , -(CH ２ ) ｎ OZ, -(CH ２ ) ｎ W or X １ and Y １ are bonded to each other to form (-CO) ２ O or (-CO) ２ NR １５ where R １１ ~R １５ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms; Z represents a hydrocarbon group or a hydrocarbon group substituted with a halogen; W represents Si(R １６ ) ｐ D （３－ｐ） (R １６ represents a hydrocarbon group having 1 to 10 carbon atoms, D represents a halogen atom, -OCOR １７ Or -OR １７ (R １７ represents a hydrocarbon group having 1 to 10 carbon atoms. p represents an integer of 0 to 3. n represents an integer of 0 to 10.

[0120] From the viewpoint of adhesion, the cyclic polyolefin having structural units represented by general formula (A-II) or (A-III) preferably contains the structural units derived from the above-mentioned norbornene compound in an amount of 90 mass% or less, more preferably 30 to 85 mass%, even more preferably 50 to 79 mass%, and most preferably 60 to 75 mass%, based on the total mass of the cyclic polyolefin. Here, the proportion of the structural units derived from the norbornene compound represents the average value in the cyclic polyolefin.

[0121] Addition (co)polymers of norbornene compounds are described in JP-A-10-7732, JP-A-2002-504184, U.S. Patent Publication No. 2004 / 229157A1, and WO 2004 / 070463, etc. Polymers of norbornene compounds can be obtained by addition polymerization of norbornene compounds (for example, polycyclic unsaturated compounds of norbornene).

[0122] Furthermore, examples of polymers of norbornene compounds include copolymers obtained by addition copolymerization of a norbornene compound with an olefin such as ethylene, propylene, or butene, a conjugated diene such as butadiene or isoprene, a non-conjugated diene such as ethylidene norbornene, or an ethylenically unsaturated compound such as acrylonitrile, acrylic acid, methacrylic acid, maleic anhydride, an acrylic acid ester, a methacrylic acid ester, maleimide, vinyl acetate, or vinyl chloride. Among these, copolymers of a norbornene compound and ethylene are preferred. Examples of such addition (co)polymers of norbornene compounds include those sold by Mitsui Chemicals, Inc. under the trade name APEL, which have different glass transition temperatures (Tg), such as APL8008T (Tg 70°C), APL6011T (Tg 105°C), APL6013T (Tg 125°C), and APL6015T (Tg 145°C). Polyplastics Co., Ltd. sells pellets such as TOPAS 8007, 6013, and 6015. Ferrania also sells Appear 3000.

[0123] The above-mentioned polymer of a norbornene compound may be commercially available, for example, from JSR Corporation under the trade name Arton G or Arton F, or from Nippon Zeon Co., Ltd. under the trade name Zeonor ZF14, ZF16, Zeonex 250, or Zeonex 280.

[0124] A hydrogenated polymer of a norbornene compound can be synthesized by subjecting a norbornene compound, etc., to addition polymerization or metathesis ring-opening polymerization, followed by hydrogenation. Synthetic methods are described in, for example, JP-A Nos. 1-240517, 7-196736, 60-26024, 62-19801, 2003-159767, and 2004-309979.

[0125] The molecular weight of the cyclic polyolefin used in the present invention is appropriately selected depending on the intended use, but is the mass average molecular weight in terms of polyisoprene or polystyrene measured by gel permeation chromatography of a cyclohexane solution (or a toluene solution if the polymer is not soluble). It is usually in the range of 5,000 to 500,000, preferably 8,000 to 200,000, and more preferably 10,000 to 100,000. A polymer having a molecular weight within the above range can achieve a good balance between high levels of mechanical strength and molding processability in a molded article.

[0126] The wavelength-selective absorption filter of the present invention preferably contains 5% by mass or more of the matrix resin, more preferably 20% by mass or more, even more preferably 50% by mass or more, particularly preferably 70% by mass or more, and of these, preferably 80% by mass or more, and most preferably 90% by mass or more. The content of the matrix resin in the wavelength-selective absorption filter of the present invention is usually 99.90% by mass or less, and preferably 99.85% by mass or less. That is, a practical range of 5 to 99.90% by mass is preferable, more preferably 20 to 99.90% by mass, even more preferably 50 to 99.90% by mass, particularly preferably 70 to 99.90% by mass, and of these, 80 to 99.90% by mass is preferable, and 90 to 99.85% by mass is most preferable. The wavelength-selective absorption filter may contain two or more types of cyclic polyolefins, and polymers differing in at least one of composition ratio and molecular weight may be used in combination. In this case, the total content of each polymer falls within the above range.

[0127] (Extensible Resin Component) The wavelength-selective absorption filter of the present invention can contain an appropriately selected component exhibiting extensibility (also referred to as an extensible resin component) as the resin component. Specific examples include acrylonitrile-butadiene-styrene resin (ABS resin), styrene-butadiene resin (SB resin), isoprene resin, butadiene resin, polyether-urethane resin, and silicone resin. Furthermore, these resins may be further hydrogenated as appropriate. As the extensible resin component, it is preferable to use an ABS resin or an SB resin, and it is more preferable to use an SB resin.

[0128] The SB resin may be, for example, a commercially available product, such as TR2000, TR2003, TR2250 (all trade names, manufactured by JSR Corporation), Clearene 210M, 220M, 730V (all trade names, manufactured by Denka Company Limited), Asaflex 800S, 805, 810, 825, 830, 840 (all trade names, manufactured by Asahi Kasei Corporation), and Eporex SB2400, SB2610, SB2710 (all trade names, manufactured by Sumitomo Chemical Co., Ltd.).

[0129] The wavelength selective absorption filter of the present invention preferably contains 15 to 95 mass % of the extensible resin component in the matrix resin, more preferably 20 to 50 mass %, and even more preferably 25 to 45 mass %.

[0130] As the extensible resin component, when a sample having a thickness of 30 μm and a width of 10 mm is prepared using the extensible resin component alone and the breaking elongation at 25° C. is measured in accordance with JIS 7127, the extensible resin component preferably exhibits a breaking elongation of 10% or more, more preferably 20% or more.

[0131] (Releasability-Controlling Resin Component) When the wavelength-selective absorption filter of the present invention is produced by a method including a step of peeling the wavelength-selective absorption filter from a release film among the methods for producing the wavelength-selective absorption filter of the present invention described below, it is possible to preferably include a component for controlling releasability (release-controlling resin component) as a resin component. By controlling the releasability of the wavelength-selective absorption filter from the release film, it is possible to prevent peeling marks from appearing on the wavelength-selective absorption filter after peeling, and it is also possible to accommodate various processing speeds in the peeling step. As a result, it is possible to obtain favorable effects in improving the quality and productivity of the wavelength-selective absorption filter.

[0132] The release property control resin component is not particularly limited and can be appropriately selected depending on the type of release film.As will be described later, when a polyester polymer film is used as the release film, for example, a polyester resin (also referred to as a polyester additive) is suitable as the release property control resin component, and when a cellulose polymer film is used as the release film, for example, a styrene elastomer is also suitable as the release property control resin component.

[0133] The polyester additives can be obtained by conventional methods such as a dehydration condensation reaction between a polybasic acid and a polyhydric alcohol, or an addition of a dibasic acid anhydride to a polyhydric alcohol followed by a dehydration condensation reaction, and polycondensation esters formed from a dibasic acid and a diol are preferred.

[0134] The weight average molecular weight (Mw) of the polyester additive is preferably 500 to 50,000, more preferably 750 to 40,000, and even more preferably 2,000 to 30,000. It is preferable that the weight average molecular weight of the polyester additive is equal to or greater than the above-mentioned preferred lower limit in terms of brittleness and wet heat durability, and it is preferable that the weight average molecular weight is equal to or less than the above-mentioned preferred upper limit in terms of compatibility with resins. The weight average molecular weight of the polyester additive is the value of the weight average molecular weight (Mw) in terms of standard polystyrene measured under the following conditions. The molecular weight distribution (Mw / Mn) can also be measured under the same conditions. Note that Mn is the number average molecular weight in terms of standard polystyrene. GPC: Gel permeation chromatography apparatus (HLC-8220GPC manufactured by Tosoh Corporation; Column: Guard column HXL-H, TSK gel G7000HXL, two TSK gel GMHXL columns, and TSK gel G2000HXL connected in sequence, manufactured by Tosoh Corporation; Eluent: tetrahydrofuran; Flow rate: 1 mL / min; Sample concentration: 0.7 to 0.8 mass%; Sample injection amount: 70 μL; Measurement temperature: 40°C; Detector: Differential refractometer (RI) meter (40°C); Standard substance: TSK standard polystyrene manufactured by Tosoh Corporation).

[0135] For the polyester-based additives and styrene-based elastomers, the descriptions regarding the polyester-based additives and styrene-based elastomers described in paragraphs

[0164] to

[0175] of WO 2022 / 138925 can be applied as they are.

[0136] The content of the release property control resin component in the wavelength-selective absorption filter of the present invention is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more, in the matrix resin. The upper limit is preferably 25% by mass or less, more preferably 20% by mass or less, and even more preferably 15% by mass or less. The above preferred range is preferable from the viewpoint of obtaining adequate adhesion. That is, in the wavelength-selective absorption filter of the present invention, the content of the release property control resin component in the matrix resin is preferably 0.05 to 25% by mass, more preferably 0.1 to 20% by mass, and even more preferably 0.1 to 15% by mass.

[0137] <Other Components> The wavelength selective absorption filter of the present invention may contain, in addition to the dyes including the dyes B to D described above and the matrix resin, an anti-fading agent, an aggregation inhibitor, a matting agent, a leveling (surfactant) agent, and the like.

[0138] (Anti-Fading Agent) The wavelength-selective absorption filter of the present invention preferably contains an anti-fading agent to prevent fading of the dyes including Dyes B to D. As the anti-fading agent for use in the present invention, the antioxidants described in paragraphs

[0143] to

[0165] of WO 2015 / 005398, the radical scavengers described in paragraphs

[0166] to

[0199] of the same, and the deterioration inhibitors described in paragraphs

[0205] to

[0206] of the same can be used.

[0139] As the anti-fading agent, a compound represented by the following general formula (IV) can be preferably used.

[0140]

[0141] In formula (IV), R １０ is an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, or R １８ CO-, R １９ SO ２ - or R２０ represents a group represented by NHCO-. １８ , R １９ and R ２０ R each independently represents an alkyl group, an alkenyl group, an aryl group, or a heterocyclic group. １１ and R １２ each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group, or an alkenyloxy group; R １３ , R １４ , R １５ , R １６ and R １７ each independently represents a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group, provided that R １０ ~R ２０ The alkyl group in the formula (I) includes an aralkyl group.

[0142] The compound represented by the general formula (IV) is the same as the compound represented by the general formula (IV) described in

[0215] to

[0221] of WO 2021 / 221122. Therefore, for the description of each substituent in the general formula (IV) and specific examples of the compound represented by the general formula (IV), the description of

[0217] to

[0221] of WO 2021 / 221122 can be applied as is.

[0143] As the above-mentioned anti-fading agent, a compound represented by the following general formula [III] can also be preferably used.

[0144]

[0145] In general formula [III], R ３１ represents an aliphatic group or an aromatic group, and Y represents a group of non-metallic atoms necessary to form a 5- to 7-membered ring together with the nitrogen atom.

[0146] The compound represented by the general formula [III] is the same as the compound represented by the general formula [III] described in

[0223] to

[0227] of WO 2021 / 221122. Therefore, for the description of each substituent in the general formula [III], and specific examples of compounds represented by the general formula [III], the description of

[0225] to

[0227] of WO 2021 / 221122 can be applied as is. In addition to the above specific examples, specific examples of the compound represented by the general formula [III] include the exemplary compounds B-1 to B-65 described on pages 8 to 11 of JP-A-2-167543, and the exemplary compounds (1) to (120) described on pages 4 to 7 of JP-A-63-95439.

[0147] The content of the antifading agent in the wavelength-selective absorption filter of the present invention is preferably 0 to 20 mass %, more preferably 0 to 5 mass %, even more preferably 0 to 3 mass %, and particularly preferably 0 to 2 mass %, relative to the total mass (100 mass %) of the wavelength-selective absorption filter. By adding the antifading agent within the above preferred range, the fastness of the dye (pigment) can be improved without causing side effects such as discoloration of the wavelength-selective absorption filter.

[0148] (Aggregation inhibitor) The wavelength-selective absorption filter of the present invention preferably contains an aggregation inhibitor, which inhibits or prevents the association of dye molecules in the wavelength-selective absorption filter of the present invention by interacting with the dyes including dyes B to D. The aggregation inhibitor is preferably contained as a compound that sharpens the absorption waveforms of dyes B to D contained in the wavelength-selective absorption filter and exhibits the function of improving light resistance. The aggregation inhibitors used in the present invention include those described in paragraphs

[0177] to

[0228] of WO 2022 / 138925.

[0149] The content of the aggregation inhibitor in the wavelength-selective absorption filter of the present invention is preferably 0.1 to 30% by mass, more preferably 1 to 20% by mass, and even more preferably 2 to 15% by mass. The aggregation inhibitor is preferably contained in the wavelength-selective absorption filter of the present invention in an amount of 10 to 1,000 parts by mass, more preferably 20 to 700 parts by mass, and even more preferably 30 to 500 parts by mass, relative to 100 parts by mass of the total content of the dyes including Dyes B to D.

[0150] (Matting Agent) It is preferable to add fine particles to the surface of the wavelength selective absorption filter of the present invention in order to provide slipperiness and prevent blocking. As the fine particles, silica (silicon dioxide, SiO ) whose surface is coated with hydrophobic groups and which takes the form of secondary particles can be used. ２ ) is preferably used. As the fine particles, fine particles such as titanium dioxide, aluminum oxide, zirconium oxide, calcium carbonate, talc, clay, calcined kaolin, calcined calcium silicate, hydrated calcium silicate, aluminum silicate, magnesium silicate, and calcium phosphate may be used together with or instead of silica. Examples of commercially available fine particles include R972 and NX90S (both trade names, manufactured by Nippon Aerosil Co., Ltd.).

[0151] These fine particles function as a so-called matting agent, and by adding the fine particles, minute irregularities are formed on the surface of the wavelength-selective absorption filter of the present invention, and due to these irregularities, even when the wavelength-selective absorption filter of the present invention is overlapped with another wavelength-selective absorption filter of the present invention or with another film, etc., the filters do not stick to each other, and smoothness is ensured. When the wavelength-selective absorption filter of the present invention contains a matting agent as fine particles, the minute irregularities caused by the protrusions of the fine particles protruding from the filter surface are such that the number of protrusions of 30 nm or more in height is 10. ４ pieces / mm ２ When the above amount is present, the effect of improving the slipperiness and blocking properties is particularly great.

[0152] It is particularly preferable to apply the matting agent fine particles to the surface layer in terms of improving blocking properties and slip properties. Methods for applying the fine particles to the surface layer include multilayer casting and coating. The content of the matting agent in the wavelength-selective absorption filter of the present invention is appropriately adjusted depending on the purpose.

[0153] (Leveling Agent) A leveling agent (surfactant) can be appropriately mixed into the wavelength-selective absorption filter of the present invention. Commonly used compounds can be used as the leveling agent, with fluorine-containing surfactants being particularly preferred. Specific examples include the compounds described in paragraphs

[0028] to

[0056] of the specification of JP-A No. 2001-330725. Furthermore, as a commercially available product, the Megafac F (trade name) series manufactured by DIC Corporation can also be used. The content of the leveling agent in the wavelength-selective absorption filter of the present invention is appropriately adjusted depending on the purpose.

[0154] The wavelength-selective absorption filter of the present invention may contain, in addition to the above-mentioned components, a low-molecular-weight plasticizer, an oligomeric plasticizer, a retardation adjuster, an ultraviolet absorber, a deterioration inhibitor, a peeling promoter, an infrared absorber, an antioxidant, a filler, a compatibilizer, and the like.

[0155] <Method for manufacturing wavelength-selective absorption filter> The wavelength-selective absorption filter of the present invention can be produced by a conventional method, such as a solution film-forming method, a melt extrusion method, or a method (coating method) of forming a coating layer on a substrate film (release film) by any method, and stretching can also be combined as appropriate. The wavelength-selective absorption filter of the present invention is preferably produced by a coating method. As the solution film-forming method and melt extrusion method, the descriptions of the solution film-forming method and melt extrusion method in

[0268] to

[0274] of WO 2021 / 014973 can be applied as is.

[0156] (Coating Method) In the coating method, a solution of the material of the wavelength-selective absorption filter of the present invention is applied to a release film to form a coating layer. A release agent or the like may be applied in advance to the surface of the release film as appropriate to control adhesion to the coating layer. The coating layer can be used by laminating it to another member via an adhesive layer in a subsequent process, and then peeling off the release film. Any adhesive can be used as the adhesive constituting the adhesive layer. The release film can be stretched as appropriate with the solution of the material of the wavelength-selective absorption filter of the present invention applied to it or with the coating layer laminated on it.

[0157] The solvent used for the solution of the wavelength-selective absorption filter material can be appropriately selected from the viewpoints of being able to dissolve or disperse the wavelength-selective absorption filter material, being able to easily form a uniform surface in the coating and drying steps, being able to ensure liquid storage stability, and having an appropriate saturated vapor pressure.

[0158] -Addition of dye (pigment)- The timing of adding the dye to the wavelength-selective, absorption filter material is not particularly limited as long as it is added at the time of film formation. For example, the dye may be added at the time of synthesis of the matrix resin, or may be mixed with the wavelength-selective, absorption filter material when preparing a coating solution for the wavelength-selective, absorption filter material.

[0159] -Release Film- The release film used to form the wavelength-selective absorption filter by a coating method or the like preferably has a film thickness of 5 to 100 μm, more preferably 10 to 75 μm, and even more preferably 15 to 55 μm. When the film thickness is equal to or greater than the above-mentioned preferable lower limit, sufficient mechanical strength is easily ensured, and defects such as curling, wrinkling, and buckling are unlikely to occur. Furthermore, when the film thickness is equal to or less than the above-mentioned preferable upper limit, when the multilayer film of the wavelength-selective absorption filter of the present invention and the release film is stored, for example, in the form of a long roll, the surface pressure applied to the multilayer film is easily adjusted to an appropriate range, and adhesion defects are unlikely to occur.

[0160] The surface energy of the release film is not particularly limited, but the adhesive strength between the wavelength-selective absorption filter and the release film can be adjusted by adjusting the relationship between the surface energies of the material of the wavelength-selective absorption filter and the coating solution and the surface energy of the release film on the side where the wavelength-selective absorption filter is formed. If the difference in surface energy is reduced, the adhesive strength tends to increase, and if the difference in surface energy is increased, the adhesive strength tends to decrease, and can be set appropriately.

[0161] The surface energy of the release film can be calculated using the Owens method from the contact angle values ​​of water and methylene iodide. For example, a DM901 (contact angle meter, manufactured by Kyowa Interface Science Co., Ltd.) can be used to measure the contact angle. The surface energy of the release film on the side on which the wavelength-selective absorption filter is formed is preferably 41.0 to 48.0 mN / m, and more preferably 42.0 to 48.0 mN / m. When the surface energy is equal to or greater than the above-mentioned preferable lower limit, the uniformity of the thickness of the wavelength-selective absorption filter can be improved, and when the surface energy is equal to or less than the above-mentioned preferable upper limit, the peel force between the wavelength-selective absorption filter and the release film can be easily controlled within an appropriate range.

[0162] In addition, the surface unevenness of the release film is not particularly limited, but can be adjusted according to the relationship between the surface energy, hardness, and surface unevenness of the wavelength selective absorption filter surface and the surface energy and hardness of the release film surface opposite to the side where the wavelength selective absorption filter is formed, for example, for the purpose of preventing adhesion failure when storing the multilayer film of the wavelength selective absorption filter of the present invention and the release film in a long roll form.If the surface unevenness is increased, adhesion failure tends to be suppressed, and if the surface unevenness is reduced, the surface unevenness of the wavelength selective absorption filter tends to be reduced, and the haze of the wavelength selective absorption filter tends to be reduced, and can be set appropriately.

[0163] Any material and film can be used as the release film. Specific examples of the material include polyester polymers (including polyethylene terephthalate films), olefin polymers, cycloolefin polymers, (meth)acrylic polymers, cellulose polymers, and polyamide polymers. Furthermore, the release film can be subjected to a surface treatment to adjust its surface properties. For example, corona treatment, room temperature plasma treatment, and saponification treatment can be performed to reduce the surface energy, and silicone treatment, fluorine treatment, and olefin treatment can be performed to increase the surface energy.

[0164] -Peel Force Between Wavelength-Selective Absorption Filter and Release Film- When the wavelength-selective absorption filter of the present invention is formed by a coating method, the peel force between the wavelength-selective absorption filter and the release film can be controlled by adjusting the material of the wavelength-selective absorption filter, the material of the release film, the internal strain of the wavelength-selective absorption filter, etc. This peel force can be measured, for example, by a test in which the release film is peeled off in a 90° direction, and the peel force measured at a rate of 300 mm / min is preferably 0.001 to 5 N / 25 mm, more preferably 0.01 to 3 N / 25 mm, and even more preferably 0.05 to 1 N / 25 mm. If the peel force is equal to or greater than the above-mentioned preferable lower limit, peeling of the release film can be prevented except in the peeling step, and if it is equal to or less than the above-mentioned preferable upper limit, peeling defects (e.g., zipping and cracking of the wavelength-selective absorption filter) can be prevented in the peeling step.

[0165] <Film Thickness of Wavelength-Selective Absorption Filter> The film thickness of the wavelength-selective absorption filter of the present invention is not particularly limited, but is preferably 1 to 18 μm, more preferably 1 to 12 μm, and even more preferably 1 to 8 μm. When the film thickness is equal to or less than the above-mentioned preferred upper limit, adding a dye at a high concentration to a thin film can suppress a decrease in polarization degree due to fluorescence emitted by the dye (pigment). Furthermore, the effects of the quencher and anti-fading agent are also easily exhibited. On the other hand, when the film thickness is equal to or greater than the above-mentioned preferred lower limit, it becomes easier to maintain uniformity of in-plane absorbance. In the present invention, a film thickness of 1 to 18 μm means that the thickness of the wavelength-selective absorption filter is within the range of 1 to 18 μm regardless of the position at which it is measured. This also applies to film thicknesses of 1 to 12 μm and 1 to 8 μm. The film thickness can be measured using an electronic micrometer manufactured by Anritsu Corporation.

[0166] <Absorbance of Wavelength-Selective Absorption Filter> In the wavelength-selective absorption filter of the present invention, the absorbance Ab(430) at a wavelength of 430 nm is preferably 0 or more and less than 3.0, more preferably 0.01 or more and less than 2.0, and even more preferably 0.05 or more and less than 1.0. Furthermore, the absorbance Ab(500) at a wavelength of 500 nm is preferably 0.05 or more and less than 2.1, more preferably 0.1 or more and less than 1.4, and even more preferably 0.1 or more and less than 1.05. The absorbance Ab(600) at a wavelength of 600 nm is preferably 0.1 or more and less than 3.0, more preferably 0.2 or more and less than 2.0, and even more preferably 0.3 or more and less than 1.5. The absorbance Ab(700) at a wavelength of 700 nm is preferably 0.01 or more and less than 3.0, more preferably 0.05 or more and less than 2.0, and even more preferably more than 0.05 ... In the absorption spectrum of the wavelength-selective absorption filter of No. 1, the absorbance at a wavelength of 430 nm is 0.08, the absorbance at a wavelength of 500 nm is 0.13, the absorbance at a wavelength of 600 nm is 0.60, and the absorbance at a wavelength of 700 nm is 0.13. By incorporating the wavelength-selective absorption filter of the present invention, whose absorbance has been adjusted to fall within the above range, into an OLED display device, the original color of the image of the OLED display device can be maintained at an excellent level, and display performance with higher brightness and better suppressed external light reflection can be obtained. The absorbance of the wavelength-selective absorption filter of the present invention can be adjusted by the type and amount of dye added (the content in the wavelength-selective absorption filter).

[0167] <Water Content of Wavelength-Selective Absorption Filter> From the viewpoint of durability, the water content of the wavelength-selective absorption filter of the present invention is preferably 0.5% by mass or less, and more preferably 0.3% by mass or less, regardless of the film thickness, under conditions of 25°C and a relative humidity of 80%. In this specification, the water content of the wavelength-selective absorption filter can be measured using a sample with a thicker film thickness as necessary. After conditioning the sample for 24 hours or more, the water content is measured by the Karl Fischer method using a water content meter and a sample drying apparatus "CA-03" or "VA-05" (both manufactured by Mitsubishi Chemical Corporation), and the water content can be calculated by dividing the water content (g) by the sample mass (g, including the water content).

[0168] <Glass Transition Temperature (Tg) of Wavelength-Selective Absorption Filter> The glass transition temperature of the wavelength-selective absorption filter of the present invention is preferably 50°C or higher and 140°C or lower. More preferably, it is 60°C or higher and 130°C or lower, and even more preferably 70°C or higher and 120°C or lower. When the glass transition temperature is equal to or higher than the above-mentioned preferable lower limit, deterioration during high-temperature use can be suppressed, and when the glass transition temperature is equal to or lower than the above-mentioned preferable upper limit, the likelihood of organic solvents used in the coating liquid remaining in the wavelength-selective absorption filter can be suppressed. The glass transition temperature of the wavelength-selective absorption filter of the present invention can be measured by the following method. In a differential scanning calorimeter (X-DSC7000 (manufactured by IT Measurement Control Co., Ltd.)), 20 mg of the wavelength-selective absorption filter is placed in a measurement pan, and the filter is heated from 30°C to 120°C at a rate of 10°C / min in a nitrogen stream, maintained at this temperature for 15 minutes, and then cooled to 30°C at -20°C / min. The temperature was then raised again from 30°C to 250°C at a rate of 10°C / min, and the temperature at which the baseline began to deviate from the low temperature side was taken as the glass transition temperature Tg. The glass transition temperature of the wavelength-selective absorption filter of the present invention can be adjusted by mixing two or more polymers with different glass transition temperatures, or by changing the amount of a low-molecular-weight compound such as an anti-fading agent added.

[0169] <Treatment of Wavelength-Selective Absorption Filter> The wavelength-selective absorption filter may be subjected to hydrophilization treatment by any of glow discharge treatment, corona discharge treatment, alkaline saponification treatment, etc., and corona discharge treatment is preferably used. It is also preferable to apply the methods disclosed in JP-A-6-94915 or JP-A-6-118232.

[0170] The obtained film may be subjected to a heat treatment step, a superheated steam contact step, an organic solvent contact step, etc., as required. In addition, a surface treatment may be appropriately performed.

[0171] Furthermore, the pressure-sensitive adhesive layer may be a layer made of a pressure-sensitive adhesive composition having a base polymer such as a (meth)acrylic resin, a styrene resin, a silicone resin, or the like, to which a crosslinking agent such as an isocyanate compound, an epoxy compound, or an aziridine compound has been added. Preferably, the description of the pressure-sensitive adhesive layer in the OLED display device described below can be applied.

[0172] Any optical film may be laminated to the wavelength-selective absorption filter of the present invention. The optical properties and materials of the above-mentioned optical film are not particularly limited, but a film containing (or having as its main component) at least one of cellulose ester resin, acrylic resin, cyclic olefin resin, and polyethylene terephthalate resin can be preferably used. An optically isotropic film or an optically anisotropic retardation film may be used. As the above-mentioned optical film containing a cellulose ester resin, for example, Fujitac TD80UL (manufactured by Fujifilm Corporation) can be used. Examples of the optical film containing an acrylic resin include an optical film containing a (meth)acrylic resin containing a styrene-based resin as described in Japanese Patent No. 4,570,042, an optical film containing a (meth)acrylic resin having a glutarimide ring structure in the main chain as described in Japanese Patent No. 5,041,532, an optical film containing a (meth)acrylic resin having a lactone ring structure as described in Japanese Patent Laid-Open No. 2009-122664, and an optical film containing a (meth)acrylic resin having a glutaric anhydride unit as described in Japanese Patent Laid-Open No. 2009-139754. Examples of the optical film containing a cyclic olefin resin include a cyclic olefin resin film as described in paragraph

[0029] and subsequent paragraphs of Japanese Patent Laid-Open No. 2009-237376, and a cyclic olefin resin film containing an additive that reduces Rth as described in Japanese Patent No. 4,881,827 and Japanese Patent Laid-Open No. 2008-063536.

[0173] The wavelength selective absorption filter of the present invention may be provided with a gas barrier layer. The material for forming the gas barrier layer is not particularly limited, and examples thereof include organic materials such as polyvinyl alcohol and polyvinylidene chloride, organic-inorganic hybrid materials such as sol-gel materials, and SiO ２ , SiO ｘ , SiON, SiN ｘ and Al ２ O ３ Examples of suitable gas barrier layers include inorganic materials such as those mentioned above. The gas barrier layer may be a single layer or a multilayer, and in the case of a multilayer, examples of suitable gas barrier layers include an inorganic dielectric multilayer film and a multilayer film in which organic and inorganic materials are alternately laminated. The method for forming the gas barrier layer is not particularly limited, and examples of suitable methods include, in the case of an organic material, a casting method such as spin coating or slit coating, and a method in which a resin gas barrier film is bonded to the wavelength-selective absorption filter of the present invention, and in the case of an inorganic material, a plasma enhanced chemical vapor deposition (CVD) method, a sputtering method, and a vapor deposition method.

[0174] The wavelength-selective absorption filter of the present invention is preferably used in an OLED display device in which the half-width (full width at half maximum) of emitted light having a peak in the range of 500 to 560 nm in the absence of a wavelength-selective absorption filter is 45 nm or less, from the viewpoint of being able to suppress a decrease in the luminance of light emitted from the OLED when applied to a wide color gamut OLED display device. The half-width (full width at half maximum) of the emitted light having a peak in the range of 500 to 560 nm is preferably 40 nm or less, and more preferably 32 nm or less. The following description relating to the OLED display device can be applied as is to an OLED display device in which the half-width (full width at half maximum) of emitted light having a peak in the range of 500 to 560 nm in the absence of a wavelength-selective absorption filter is 45 nm or less.

[0175] [OLED Display Device] The OLED display device of the present invention includes the wavelength-selective absorption filter of the present invention. The OLED display device of the present invention can be configured in any manner, without particular limitation, so long as the half-width (full-width at half maximum) of emitted light having a peak in the 500-560 nm range without the wavelength-selective absorption filter is 45 nm or less (preferably 40 nm or less, more preferably 32 nm or less) and the OLED display device includes the wavelength-selective absorption filter of the present invention. Examples of the configuration of the OLED display device of the present invention are not particularly limited, but include, for example, a display device including, in order from the side opposite to the side facing external light, glass, a layer including a TFT (thin film transistor), an OLED display element, a barrier film, a color filter, glass, an adhesive layer, the wavelength-selective absorption filter of the present invention, and a surface film. In the present invention, the half-width of emitted light refers to the value, i.e., the full-width at half maximum, expressed by the following relational expression, when λ1 is the wavelength closest to the peak wavelength λmax on the shorter wavelength side and λ2 is the wavelength closest to the peak wavelength λmax on the longer wavelength side, among the wavelengths at which the luminance is half the peak luminance when only G (green) pixels are illuminated: (Half-width) = λ2 - λ1 The OLED display element has a configuration in which an anode electrode, a light-emitting layer, and a cathode electrode are laminated in this order. In addition to the light-emitting layer, a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer, and the like are included between the anode electrode and the cathode electrode. For other examples, see the description in JP-A-2014-132522. Furthermore, as the color filter, in addition to a normal color filter, a color filter laminated with quantum dots can also be used. A resin film can also be used instead of the glass.

[0176] By including the wavelength-selective absorption filter of the present invention, the OLED display device of the present invention can suppress external light reflection by the dye contained in the filter, and can maintain the original color of the image formed by light emitted from the light-emitting layer (light source) at an excellent level. Furthermore, it is possible to sufficiently suppress both external light reflection and brightness reduction. In other words, while an anti-reflection film is usually used as the surface film, by employing the wavelength-selective absorption filter of the present invention, the OLED display device of the present invention can achieve the above-mentioned excellent effects without using an anti-reflection film. Note that the OLED display device of the present invention may be configured to use an anti-reflection film in combination, as long as the effects of the present invention are not impaired. The OLED color image forming method applicable to the OLED display device of the present invention is not particularly limited except that the half-width of G (green) is 45 nm or less (preferably 40 nm or less, more preferably 32 nm or less), and any of the following methods can be used: a three-color coating method of R (red), G (green), and B (blue), a color conversion method using quantum dots (QDs), and a color filter method. The QD color conversion method is preferably used because it can achieve a small half-width of G (green), specifically, 40 nm or less, or even 32 nm or less, and a method using QD color conversion and color filters in combination is particularly preferably used. Therefore, each light-emitting layer corresponding to the above image forming method can be used as the light source of the OLED display device of the present invention. For example, by using a display element that combines quantum dots (QDs) and an OLED, such as a QD-OLED, as an OLED display element, it is possible to realize an OLED display device (wide color gamut OLED display device) that has a narrow half-width of 45 nm or less (preferably 40 nm or less, more preferably 32 nm or less) of emitted light having a peak in the 500 to 560 nm range, high color purity, and a wider color gamut. Specific configurations include, for example, a structure shown in FIG. 2 described below, in which a blue OLED is used as a light source and red and green are emitted by red and green quantum dots and color filters.For QD-OLED, for example, the description in JP-A-2022-78975 can be referred to, and the description in JP-A-2022-78975 can be applied as it is, except that the peak of emitted light having a half width of 45 nm or less is in the range of 500 to 560 nm.

[0177] <Adhesive Layer> In the OLED display device of the present invention, the wavelength selective absorption filter of the present invention is preferably attached to glass via an adhesive layer. As the adhesive layer, the descriptions relating to the adhesive layer and the formation method in the OLED display device described in

[0296] to

[0347] of WO 2021 / 014973 can be applied as is.

[0178] <Substrate> In the OLED display device of the present invention, the wavelength selective absorption filter of the present invention is preferably attached to glass via an adhesive layer.

[0179] The method for forming the above-mentioned adhesive layer is not particularly limited, and for example, the method of applying an adhesive composition to the wavelength-selective absorption filter of the present invention by ordinary means such as a bar coater, drying and curing; the method of first applying an adhesive composition to the surface of a release substrate, drying, and then transferring the adhesive layer to the wavelength-selective absorption filter of the present invention using the release substrate, aging and curing, etc. can be used.The release substrate is not particularly limited, and any release substrate can be used, and for example, the release film in the manufacturing method of the wavelength-selective absorption filter of the present invention mentioned above can be mentioned.In addition, the conditions of application, drying, aging and curing can also be appropriately adjusted based on ordinary methods.

[0180] The present invention will be described in more detail below based on examples. The materials, amounts used, ratios, processing details, processing procedures, etc. shown in the following examples can be changed as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention is not limited to the examples shown below. In the following examples, "parts" and "%" representing the composition are based on mass unless otherwise specified. In addition, λ ｍａｘ means the maximum absorption wavelength showing the maximum absorbance.

[0181] [Preparation of wavelength-selective absorption filter] The materials used in preparing the wavelength-selective absorption filter are as follows: <Matrix resin> (Resin 10) ARTON RX4500 (trade name, manufactured by JSR Corporation, norbornene-based polymer, Tg 132°C), which is a cyclic polyolefin resin, was used as Resin 10. (Release property control resin component 3) TUFTEC M1943 (trade name, manufactured by Asahi Kasei Corporation, hydrogenated styrene-based thermoplastic elastomer (SEBS))

[0182] <Dye> Dye A was E-14 (λ ｍａｘ = 430 nm), and the following 7-23 (λ ｍａｘ = 505 nm), and dye C was the following C-73 (λ ｍａｘ = 590 nm), and dye D is F-35 (λ ｍａｘ = 700 nm) were used.

[0183] In addition, the λ described in the above dye section ｍａｘ means the maximum absorption wavelength showing the greatest absorbance measured under the following conditions: The dye was dissolved in chloroform to a concentration of 1 x 10 －６ A measurement solution of 100 mol / L was prepared. The measurement solution was measured at a maximum absorption wavelength λ of 100 mol / L at 23°C using a cell with an optical path length of 10 mm and a spectrophotometer UV-1800PC (manufactured by Shimadzu Corporation). ｍａｘ was measured.

[0184] <Additives> (Association Inhibitor) The following compound was used as association inhibitor 303.

[0185]

[0186] (Substrate 1) A cellulose acylate film (manufactured by Fujifilm Corporation, trade name: ZRD40SL) was used as the substrate 1.

[0187] (1) Preparation of Wavelength-Selective Absorbing Layer Forming Solution A The components were mixed in the composition shown below to prepare wavelength-selective absorbing layer forming solution A. ------------------------------------------------ Composition of wavelength-selective absorption layer forming solution A------------------------------------------------ Resin 10 87.6 parts by mass Peelability control resin component 3 3.4 parts by mass Leveling agent: Megafac F-554 (trade name, manufactured by DIC Corporation, fluorine-based polymer) 0.16 parts by mass Dye E-14 0.80 parts by mass Dye 7-23 0.49 parts by mass Dye C-73 2.77 parts by mass Dye F-35 0.67 parts by mass Association inhibitor 303 4.10 parts by mass Cyclohexane (solvent) 1,018.3 parts by mass Ethyl acetate (solvent) 548.3 parts by mass------------------------------------------------

[0188] Subsequently, the wavelength-selective absorption layer-forming solution A obtained was filtered using a filter paper (#63, manufactured by Toyo Roshi Kaisha) with an absolute filtration accuracy of 10 μm, and further filtered using a sintered metal filter (FH025, manufactured by Pall Corporation) with an absolute filtration accuracy of 2.5 μm.

[0189] (2) Preparation of wavelength-selective absorption filter No. 1 with substrate The wavelength-selective absorption layer-forming solution A after the above-mentioned filtration treatment was applied to substrate 1 using a bar coater so that the film thickness after drying would be 1.2 μm, and the applied film was dried at 120° C. to prepare wavelength-selective absorption filter No. 1 with substrate.

[0190] (3) Preparation of Substrate-Attached Wavelength-Selective Absorption Filters Nos. 2 to 6 and C1 to C3 Substrate-attached wavelength-selective absorption filters Nos. 2 to 6 and C1 to C3 were prepared in the same manner as for preparation of substrate-attached wavelength-selective absorption filter No. 1, except that the blended amount of dye was changed to the content shown in Table 1 below. Note that, while the blended amounts of peelability-controlling resin component 3, leveling agent, and aggregation inhibitor 303 in substrate-attached wavelength-selective absorption filter No. 1 were fixed, the blended amount of resin was changed in accordance with the change in the blended amount of dye, and adjustments were made so that the overall mass of the filter did not change.

[0191] The configuration of each wavelength-selective absorption filter with a substrate is summarized in Table 1 below. Wavelength-selective absorption filters with a substrate Nos. 1 to 6 are wavelength-selective absorption filters with a substrate of the present invention, wavelength-selective absorption filters with a substrate Nos. C1 and C2 are comparative wavelength-selective absorption filters with a substrate, and wavelength-selective absorption filter with a substrate No. C3 is a wavelength-selective absorption filter with a substrate for reference.

[0192] <Absorption Maximum of Wavelength-Selective Absorption Filter> Using a UV3150 spectrophotometer (trade name) manufactured by Shimadzu Corporation, the absorbance of the wavelength-selective absorption filter with a substrate was measured in 1 nm increments in the wavelength range from 380 nm to 800 nm. ｘ (λ) and the absorbance Ab of the wavelength-selective absorption filter with a substrate that does not contain a dye (i.e., the wavelength-selective absorption filter No. C3). ０ (λ), Ab ｘ (λ)-Ab ０ The maximum absorbance difference (λ) was calculated and defined as the absorption maximum. ｍａｘ were 428 nm for dye E-14, 504 nm for dye 7-23, 591 nm for dye C-73, and 700 nm for dye F-35, respectively.

[0193] <Simulation of relative luminance, reflectance, and reflected color> For the OLED display device (1) below equipped with the wavelength-selective absorption filter produced above, a simulation of external light reflection was performed, and the reflectance and reflected color (x and y) were calculated as in (3) below, and the relative luminance was calculated as in (4) below. Table 2 below shows the combinations of the emitted light spectrum and wavelength-selective absorption filter used in the simulation, as well as the evaluation results related to the suppression of external light reflection, reflected color, and suppression of luminance reduction. Note that the wavelength-selective absorption filter with a substrate is applied as a wavelength-selective absorption filter from which the substrate has been peeled off.

[0194] (1) Configuration of OLED Display Device The OLED display device used for the simulation was assumed to be a device that displays images using blue OLED elements and color filters containing quantum dots (QDs), as shown in FIG. 2 . That is, the OLED display device 1 shown in FIG. 2 includes, in order on a TFT substrate, a blue OLED element, an RG selective reflection layer 21, a color filter (CF) containing quantum dots (QDs), a black matrix 71, and the wavelength-selective absorption filter 82 prepared above. The wavelength-selective absorption filter 82 is located on the ambient light side (viewing side). The TFT substrate has a configuration in which a TFT 12 is provided on a substrate 11. The blue OLED element has a configuration in which an anode 13, a blue OLED 14, and a cathode 15 are stacked from the TFT substrate side. A barrier film 16 is disposed between the blue OLED element and the RG selective reflection layer 21. The color filter containing quantum dots contains quantum dots as red and green light-emitting portions. The color filter corresponding to red has a configuration in which a layer 31 containing red quantum dots and a light diffuser, a B selective reflection layer 51, and a red color filter 32 are arranged in this order on the RG selective reflection layer 21. The color filter corresponding to green has a configuration in which a layer 41 containing green quantum dots and a light diffuser, a B selective reflection layer 51, and a green color filter 42 are arranged in this order on the RG selective reflection layer 21. The layer 31 containing red quantum dots and a light diffuser is a color conversion unit that converts light in the blue wavelength band to light in the red wavelength band, and the layer 41 containing green quantum dots and a light diffuser is a color conversion unit that converts light in the blue wavelength band to light in the green wavelength band. The color filter corresponding to blue has a configuration in which a blue color filter 62 is arranged on the RG selective reflection layer 21. Glass 81 is provided between the color filter and black matrix 71 containing quantum dots and the wavelength selective absorption filter 82, and a low-reflection surface film 83 is provided on the wavelength selective absorption filter 82.

[0195] (2) Simulation Conditions In the OLED display device 1 shown in FIG. 2, in a simulation of the reflectance and reflected color associated with irradiation with external light AR, the reflectance and reflection spectrum values ​​of carbon black were used when no wavelength selective absorption filter was used.

[0196] In the above, the reflection spectrum was measured using a UV3150 spectrophotometer (trade name) manufactured by Shimadzu Corporation.

[0197] (3) Calculation of Reflectance and Reflection Color The reflectance and reflection color were calculated from the above reflection spectrum and the transmission spectrum of the wavelength selective absorption filter measured using a UV3150 spectrophotometer (product name) manufactured by Shimadzu Corporation. Specifically, the calculations are as follows.

[0198] The reflectance spectrum of carbon black is R ＣＢ and the transmission spectrum of the wavelength selective absorption filter is T ｄｙｅ The reflectance spectrum was calculated using the following formula: Reflectance spectrum = R ＣＢ × (T ｄｙｅ ) ２ Based on the reflection spectrum calculated above, the reflectance (visibility corrected) and reflection color (x and y) were calculated.

[0199] (4) Calculation of Relative Brightness The relative brightness when the wavelength selective absorption filter prepared above was used was calculated as follows: Spectrum of RS65-B2 (quantum dot LCD TV, product name) manufactured by Vizio, when displaying white: S(λ) Ａ (FWHM of the emitted light spectrum at wavelengths of 500 to 560 nm is 30 nm), and the spectrum of the white display of the XRJ-55A90J (OLED TV, product name) manufactured by Sony Corporation: S(λ) Ｂ (FWHM of the emitted light spectrum at wavelengths of 500 to 560 nm is 54 nm), and the backlight spectrum of Samsung's 55"Q7F (quantum dot LCD TV, product name): S(λ) Ｃ The half-width of the emitted light spectrum at wavelengths of 500 to 560 nm was 39 nm. The transmission spectrum of the wavelength-selective absorption filter was defined as T(λ). The luminance without the wavelength-selective absorption filter was defined as spectrum S(λ). Ａ , S(λ) Ｂ and S(λ) Ｃ The luminance was calculated by correcting for visibility, and the luminance was set to 100. When a wavelength selective absorption filter is used, S(λ) Ａ ×T(λ) luminance, S(λ) Ｂ×T(λ) luminance and S(λ) Ｃ The luminance of each wavelength-selective absorption filter was calculated as a relative luminance to the luminance when the wavelength-selective absorption filter was not used.

[0200] <Evaluation of Suppression of Luminance Decrease> The relative luminance values ​​obtained in the above simulation were applied to the following criteria to evaluate the suppression of luminance decrease. -Evaluation criteria- A: 90<relative luminance≦100 B: 80<relative luminance≦90 C: 70<relative luminance≦80 D: 0≦relative luminance≦70

[0201] <Evaluation of suppression of external light reflection> Using the reflectance values ​​obtained in the above simulation, the reflectance reduction rate was calculated according to the following formula, and the suppression of external light reflection was evaluated based on the following criteria: Reflectance reduction rate = (R0 - R1) / R0 × 100% R1: reflectance when a wavelength selective absorption filter containing a dye was used R0: reflectance when the wavelength selective absorption filter of No. C3 containing no dye was used Evaluation criteria A: 50% < reflectance reduction rate ≦ 80% B: 20% < reflectance reduction rate ≦ 50% C: 0 ≦ reflectance reduction rate ≦ 20%

[0202] <Evaluation of External Light Reflection Color> The x and y values ​​obtained in the above simulation were applied to the following criteria to evaluate the external light reflection color. Note that evaluation criterion "A" corresponds to coordinates on the xy chromaticity diagram where the color of the white display is at a color temperature of 8000 to 12000 K, evaluation criterion "B" corresponds to coordinates on the xy chromaticity diagram where the color of the white display is at a color temperature of 6500 K or more but less than 8000 K, and evaluation criterion "C" corresponds to coordinates on the xy chromaticity diagram where the color of the white display is at a color temperature less than 6500 K or more than 12000 K. Therefore, a rating of "B," or preferably "A," is preferable because the reflection color of the wavelength selective absorption filter and the color of the white display of the emitted light are close, and the difference in color between the display light and the reflected light of the displayed image is less visible. - Evaluation criteria - A: (0.269, 0.280) ≦ (x, y) ≦ (0.295, 0.305) B: (0.269, 0.280) ≦ (x, y) ≦ (0.313, 0.329) (excluding cases that fall under A) C: (x, y) < (0.269, 0.280), or (x, y) > (0.313, 0.329)

[0203]

[0204]

[0205] (Notes for Table 1) Dye content: This refers to the amount of dye in 100 parts by mass of the filter, and the unit is parts by mass. The notation "-" in the dye column indicates that the corresponding dye is not contained. Absorbance: The absorbance Ab of the wavelength selective absorption filter with a substrate at a wavelength λ nm, measured as described above. ｘ (λ), the absorbance at 430 nm, 500 nm, 600 nm, and 700 nm are shown. Ab(430) / Ab(600), Ab(500) / Ab(600), Ab(430) / Ab(700), and Ab(700) / Ab(600): The absorbance ratios calculated using Ab(430), Ab(500), Ab(600), and Ab(700) listed in the absorbance column are shown, respectively. The "-" symbol in the column for the dye and each absorbance ratio for No. C3 indicates that No. C3 is a wavelength-selective absorption filter with a substrate that does not contain a dye, and corresponds to the reference filter for each wavelength-selective absorption filter, so no value is listed.

[0206] (Note for Table 2) S(λ) Ａ , S(λ) Ｂ and S(λ) Ｃ : the above-mentioned output light spectrum S(λ) Ａ , S(λ) Ｂ and S(λ) Ｃ Wavelength-selective absorption filters Nos. 1 to 6 and C1 to C3: Correspond to wavelength-selective absorption filters Nos. 1 to 6 and C1 to C3 listed in Table 1, respectively.

[0207] The results in Tables 1 and 2 above reveal the following. As shown in Reference Example 2, the dye-free reference wavelength-selective absorption filter No. C3 was insufficient in suppressing external light reflection and suppressing the effects on the original color of the displayed image. Furthermore, the comparative wavelength-selective absorption filter No. C1 used in Comparative Example 1 did not satisfy the relational formula (I) of the present invention, and the comparative wavelength-selective absorption filter No. C2 used in Comparative Example 2 did not satisfy the relational formula (II) of the present invention. These comparative wavelength-selective absorption filters No. C1 and C2 had a reflection color that was different from the color of the white display of the emitted light, and the effects on the original color of the displayed image were not suppressed. In contrast, as shown in Examples 1 to 7 and Reference Example 1, the wavelength-selective absorption filters No. 1 to 6 of the present invention were excellent in suppressing external light reflection, and the reflection color was close to the color of the white display of the emitted light, suppressing the effects on the original color of the displayed image. Furthermore, as shown in Examples 1 to 7, when the wavelength-selective absorption filter of the present invention was applied to a display device equipped with a QDOLED having a narrow half-width of the peak in the emission light wavelength range of 500 to 560 nm, such as 30 nm or 39 nm, the decrease in luminance due to the provision of the wavelength-selective absorption filter was suppressed. Note that, as shown in Examples 1 and 7 and Reference Example 1, it can be seen that the wavelength-selective absorption filter of the present invention is further suppressed by applying it to a display device equipped with a QDOLED having a narrow half-width of the peak in the emission light wavelength range of 500 to 560 nm.

[0208] While the present invention has been described in connection with embodiments thereof, we do not intend to limit our invention to any of the details of the description unless otherwise specified, and believe that the claims should be construed broadly without departing from the spirit and scope of the invention as set forth in the appended claims.

[0209] This application claims priority based on Japanese Patent Application No. 2022-084869 filed in Japan on May 24, 2022, and Japanese Patent Application No. 2022-178289 filed in Japan on November 7, 2022, the contents of which are incorporated herein by reference.

[0210] REFERENCE SIGNS LIST 1 OLED display device 11 Substrate 12 TFT (thin film transistor) 13 Anode 14 BOLED (blue OLED) 15 Cathode 16 Barrier film 21 RG selective reflection layer (red / green selective reflection layer) 31 Layer containing red QD (red quantum dot) and light diffuser 32 Red color filter 41 Layer containing green QD (green quantum dot) and light diffuser 42 Green color filter 51 B selective reflection layer (blue selective reflection layer) 62 Blue color filter 71 Black matrix 81 Glass 82 Wavelength-selective absorption filter 83 Surface film AR External light BM ｉｎ External light incident on the black matrix R ｉｎ External light incident on red pixel G ｉｎ External light incident on green pixel B ｉｎ External light incident on blue pixel BM ｒｅｆ Reflection of external light in the black matrix R ｒｅｆ Reflection of external light in red pixels G ｒｅｆ Reflection of external light in green pixels B ｒｅｆ Reflection of external light in blue pixels

Claims

1. A wavelength-selective absorption filter containing a resin and the following dyes B, C, and D, each of which has a main absorption wavelength band in a different wavelength region, wherein the absorbance Ab(λ) of the wavelength-selective absorption filter at a wavelength λ nm satisfies the following relational expressions (I) and (II): Dye B: A dye having a main absorption wavelength band in the wavelength range of 480 to 520 nm in the wavelength selective absorption filter. Dye C: A dye having a main absorption wavelength band in the wavelength range of 580 to 620 nm in the wavelength selective absorption filter. Dye D: A dye having a main absorption wavelength band in the wavelength range of 680 to 780 nm in a wavelength selective absorption filter. Relationship formula (I): Ab(500) / Ab(600)<0.7 Relational formula (II): Ab(430) / Ab(700)<3.0

2. 2. The wavelength-selective absorption filter according to claim 1, comprising the following dye A: Dye A: A dye having a main absorption wavelength band in the wavelength range of 390 to 435 nm in a wavelength selective absorption filter.

3. 3. The wavelength-selective absorption filter according to claim 1, which satisfies the following relational formula (II-a): Relational formula (II-a): Ab(430) / Ab(700)<1.0

4. 3. The wavelength-selective absorption filter according to claim 1, which satisfies the following relational expressions (III) and (IV): Relational formula (III): Ab(430) / Ab(600)<1.0 Relationship formula (IV): Ab(700) / Ab(600)<2.0

5. 3. The wavelength-selective absorption filter according to claim 1, which is used in an organic electroluminescence display device in which the half-width of emitted light having a peak at a wavelength of 500 to 560 nm is 45 nm or less in the absence of the wavelength-selective absorption filter.

6. 3. An organic electroluminescence display device having a half-width of 45 nm or less of emitted light having a peak at a wavelength of 500 to 560 nm in the absence of a wavelength-selective absorption filter, the organic electroluminescence display device comprising the wavelength-selective absorption filter according to claim 1 or 2.