Wavelength Selective Absorption Filter, Polarizer, Organic Electroluminescent Display Device, and Liquid Crystal Display Device

Abstract

The present invention provides a wavelength selective absorption filter containing a resin and the following dyes A and C having main absorption wavelength bands in different wavelength regions, a polarizing plate including the wavelength selective absorption filter, an organic electroluminescent display device, or a liquid crystal display device. Among them, the above-mentioned dyes A and C do not have fluorescence. Dye A: a dye having a main absorption wavelength band at a wavelength of 400 to 450 nm in the wavelength selective absorption filter; Dye C: a dye having a main absorption wavelength band at a wavelength of 560 to 600 nm in the wavelength selective absorption filter.

Description

Technical Field

[0001] The present invention relates to a wavelength selective absorption filter, a polarizer, an organic electroluminescent display device, and a liquid crystal display device. Background Art

[0002] Image display devices such as liquid crystal display devices or organic electroluminescent (OLED) display devices are being increasingly used as space-saving and low-power-consuming image display devices. Among them, in applications such as televisions that require high-quality images, in addition to high resolution, high color reproducibility, excellent contrast, etc. are also required.

[0003] In a liquid crystal display device, the liquid crystal panel itself that displays an image is a non-light-emitting element that does not emit light. Therefore, a backlight unit that is disposed behind the liquid crystal panel and supplies light to the liquid crystal panel is provided.

[0004] In recent years, white light-emitting diodes (LEDs) have been used as light sources for backlight units. As a light-emitting device using a white LED, a method of mixing light emitted from a blue LED and light emitted from a yellow phosphor or light emitted from a green phosphor and a red phosphor to produce white light is known. However, the above method has problems such as a narrow color reproduction region and low color reproducibility compared with organic light-emitting diodes (OLEDs) and the like that are attracting attention as next-generation displays, and thus new technologies for overcoming these problems are required.

[0005] In response to this, Patent Document 1 proposes a technique in which an absorption dye having a main absorption wavelength band other than RGB and a fluorescent dye having a main absorption wavelength band other than RGB and a main emission wavelength band corresponding to RGB are included in the same layer or different layers in at least one of the coating layers or adhesive layers constituting the backlight unit and the liquid crystal panel of the liquid crystal display device, thereby blocking light of unnecessary wavelengths other than the RGB wavelengths (R represents red, G represents green, and B represents blue) emitted from the white LED, improving color purity, and suppressing a decrease in brightness.

[0006] Moreover, in Patent Documents 2 to 4, as a color adjustment filter that corrects the color balance of the three colors without adversely affecting the three-color light emission of RGB, a color adjustment filter using a squarylium-based pigment having specific substituents is proposed.

[0007] On the other hand, as a method for forming a color image of an organic EL display device, a three-color separation coating method of R (red), G (green), and B (blue), a color conversion method, and a color filter method are known. However, the method using the color filter method is widely used for TV applications. In the color filter method, white light from a white light-emitting layer is passed through a color filter to obtain the three primary colors of RGB. For example, a layer doped with a plurality of fluorescent materials can be used as the white light-emitting layer. Such a white light-emitting layer is called a white organic EL light source.

[0008] The white light from the white organic EL light source contains light having wavelengths unnecessary for forming a color image (for example, light showing orange near 590 nm), which causes a reduction in the color reproducibility of the organic EL display device.

[0009] For example, in Patent Document 5, as an optical film having a high blue light cut-off function and capable of imparting good display characteristics when used in a display device, an invention of a color correction filter including at least one compound having a secondary methylene skeleton in which the absorbances of the optical films at wavelengths of 420 nm and 450 nm satisfy a specific relational expression and having a specific structure is described.

[0010] Prior Art Documents

[0011] Patent Documents

[0012] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2016-90998

[0013] Patent Document 2: International Publication No. 2004 / 005981

[0014] Patent Document 3: International Publication No. 2008 / 090757

[0015] Patent Document 4: Japanese Patent No. 5205794

[0016] Patent Document 5: Japanese Unexamined Patent Application Publication No. 2017-142412 Summary of the Invention

[0017] Technical Problem to be Solved by the Invention

[0018] As color gamut standards that are emphasized in display device applications, the NTSC standard and DCI-P3 can be cited. The NTSC (National Television System Committee) standard was developed by the National Television Standards Committee of the United States and has been used since the analog television, CRT (Cathode Ray Tube), and monitor eras. On the other hand, DCI-P3 is a color gamut standard (color space) for digital cinema advocated by the industry group Digital Cinema Initiatives of American film production companies.

[0019] The DCI-P3 standard has a wider red color gamut than the NTSC standard. In contrast, the NTSC standard has the advantage of a wider green color gamut than the DCI-P3 standard. Also, regarding the blue color gamut, the ranges covered by the two are different, and the two are used separately depending on applications such as images or display images. As a wavelength-selective absorption filter capable of achieving excellent color reproducibility, it is required to develop a wavelength-selective absorption filter that can achieve a high coverage rate in both the NTSC standard and the DCI-P3 standard so that a single wavelength-selective absorption filter can be applied to various display device applications.

[0020] However, as a result of research by the present inventors, it was found that in the methods described in Patent Documents 1 to 5 above, in the color gamuts of the two standards, the NTSC standard and the DCI-P3 standard, which are emphasized in display device applications, it cannot be said that the suppression of both color reproducibility and brightness reduction is sufficient.

[0021] In the technology described in Patent Document 1 above, it was found that there are the following problems: the directivity of the fluorescence emitted by the dye is different from the directivity of the display light emitted from the backlight unit, so the hue changes depending on the viewing direction, making it difficult to achieve excellent color reproducibility; and when the layer containing the dye is disposed at a position sandwiched between two polarizers in a liquid crystal display device, the contrast decreases. Also, the pigments described in Patent Documents 2 to 4 above not only absorb light in unnecessary wavelength regions but also relatively largely absorb light in necessary wavelength regions. Therefore, when attempting to block light of unnecessary wavelengths through the layer containing the pigment, the reduction in brightness becomes large, and it is impossible to achieve sufficient color reproducibility while suppressing the relative reduction in brightness. Also, when using the pigment described in Patent Document 5, although the reduction in brightness can be prevented to some extent, sufficient color reproducibility cannot be achieved.

[0022] An object of the present invention is to provide a wavelength-selective absorption filter that can achieve excellent color reproducibility while suppressing the relative reduction in brightness when used on the front surface of an image display device.

[0023] Further, an object of the present invention is to provide a polarizing plate, a liquid crystal display device, or an organic electroluminescent display device including the wavelength selective absorption filter.

[0024] Means for Solving the Technical Problem

[0025] In view of the above problems, as a result of intensive studies by the present inventors, it has been found that by blocking light having a wavelength of 560 to 600 nm and further blocking light having a wavelength of 400 to 450 nm, the chromaticity of blue light can be adjusted, thereby effectively improving the gamut coverage of the NTSC standard and the DCI-P3 standard, and thus it is possible to balance the suppression of brightness reduction due to light blocking and excellent color reproducibility. The present invention has been completed by further repeating studies based on these findings.

[0026] That is, the above problems have been solved by the following means.

[0027] <1>

[0028] A wavelength selective absorption filter containing a resin and the following dyes A and C having main absorption wavelength bands in different wavelength regions. Among them, the above dyes A and C do not have fluorescence.

[0029] Dye A: A dye having a main absorption wavelength band at a wavelength of 400 to 450 nm in the wavelength selective absorption filter

[0030] Dye C: A dye having a main absorption wavelength band at a wavelength of 560 to 600 nm in the wavelength selective absorption filter

[0031] <2>

[0032] The wavelength selective absorption filter according to <1>, wherein

[0033] The above dye A is a pigment represented by the following general formula (A1).

[0034] [Chemical formula 1]

[0035]

[0036] In the above formula, R 1 and R 2 each independently represent an alkyl group or an aryl group, and R 3 to R 6 each independently represent a hydrogen atom or a substituent, and R 5 and R 6 may be bonded to each other to form a 6-membered ring.

[0037] <3>

[0038] A polarizing plate comprising the wavelength-selective absorption filter described in <1> or <2>.

[0039] <4>

[0040] An organic electroluminescent display device or a liquid crystal display device comprising the wavelength-selective absorption filter described in <1> or <2>.

[0041] In the present invention, when there are a plurality of substituents or linking groups represented by specific symbols or formulas (hereinafter referred to as substituents, etc.) or when a plurality of substituents, etc. are defined simultaneously, unless otherwise specified, each substituent, etc. may be the same as or different from each other. This also applies to the definition of the number of substituents, etc. And when a plurality of substituents, etc. are close to each other (especially when adjacent), unless otherwise specified, they may be linked to each other to form a ring. And unless otherwise specified, rings such as alicyclic rings, aromatic rings, and heterocyclic rings may be further fused to form a fused ring.

[0042] In the present invention, when defining the number of carbon atoms of a group, unless otherwise specified in the present invention or in this specification, the number of carbon atoms refers to the total number of carbon atoms of the group as a whole. That is, in the case where the group further has a substituent form, it refers to the total number of carbon atoms including the substituent.

[0043] In the present invention, unless otherwise specified, the components (dyes, resins, and other components that may be appropriately contained, etc.) constituting the wavelength-selective absorption filter may each contain one kind in the wavelength-selective absorption filter, or may contain two or more kinds.

[0044] In the present invention, unless otherwise specified, regarding double bonds, when there are E-type and Z-type in the molecule, it may be any one of them, and it may also be a mixture thereof.

[0045] In the present invention, the representation of a compound (including a complex) is used to include the meaning of its salt and its ion in addition to the compound itself. And it refers to a substance obtained by changing a part of the structure within the range not damaging the effects of the present invention. Moreover, regarding a compound without indicating substitution or unsubstitution, it means that it may have any substituent within the range not damaging the effects of the present invention. This also applies to substituents and linking groups.

[0046] And in the present invention, the numerical range represented by "~" refers to a range including the numerical values described before and after "~" as the lower limit value and the upper limit value.

[0047] In the present invention, the composition includes, in addition to a mixture with a constant component concentration (each component is uniformly dispersed), a mixture in which the component concentration varies within the range not damaging the target function.

[0048] In the present invention, having a main absorption wavelength band at wavelengths XX to YY nm means that the wavelength showing maximum absorption (i.e., the maximum absorption wavelength) exists in the wavelength region XX to YY nm. Therefore, if the maximum absorption wavelength is within the above wavelength region, the entire absorption band including this wavelength may be within the above wavelength region or may extend outside the above wavelength region. And, in the case where there are multiple maximum absorption wavelengths, as long as the effects of the present invention are exhibited, it is sufficient that the maximum absorption wavelength showing the maximum absorbance exists in the above wavelength region. That is, the maximum absorption wavelengths other than the maximum absorption wavelength showing the maximum absorbance may exist either inside or outside the above wavelength region XX to YY nm within the range where the effects of the present invention are exhibited.

[0049] Advantages of the Invention

[0050] When the wavelength selective absorption filter and polarizer of the present invention are used on the front surface of an image display device, it is possible to suppress a decrease in relative brightness while showing excellent color reproducibility.

[0051] Moreover, the organic electroluminescent display device and liquid crystal display device of the present invention equipped with the wavelength selective absorption filter of the present invention can suppress a decrease in relative brightness while showing excellent color reproducibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram showing an embodiment of a liquid crystal display device equipped with the wavelength selective absorption filter of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0053] [Wavelength Selective Absorption Filter]

[0054] The wavelength selective absorption filter of the present invention contains a resin and the following dyes A and C having main absorption wavelength bands in different wavelength regions. Among them, these dyes A and C do not have fluorescence.

[0055] Dye A: A dye having a main absorption wavelength band at wavelengths 400 to 450 nm in the wavelength selective absorption filter

[0056] Dye C: A dye having a main absorption wavelength band at wavelengths 560 to 600 nm in the wavelength selective absorption filter

[0057] In the present invention, the main absorption wavelength band of the dye means the main absorption wavelength band of the dye measured in the state of the wavelength selective absorption filter. Specifically, in the following examples, it is measured and calculated under the conditions described in the absorption maximum value of the wavelength selective absorption filter in the state of the wavelength selective absorption filter with a substrate.

[0058] Regarding the form of the wavelength - selective absorption filter of the present invention, as long as the dye in the wavelength - selective absorption filter shows an absorption spectrum and can achieve the effects of the present invention. As one form of the wavelength - selective absorption filter of the present invention, the above - mentioned "dye" is dispersed (preferably dissolved) in the above - mentioned resin to make the wavelength - selective absorption filter a filter that shows a specific absorption spectrum derived from the dye. This dispersion can be any of random, regular, etc.

[0059] In the present invention, the fact that the dye does not have fluorescence means that it does not show fluorescence.

[0060] The above - mentioned dye A and dye C that can be contained in the wavelength - selective absorption filter of the present invention can each independently be one kind or two or more kinds.

[0061] Within the range where the wavelength - selective absorption filter of the present invention can achieve the effects of the present invention, it can also contain dyes other than the above - mentioned dye A and dye C.

[0062] When the wavelength - selective absorption filter of the present invention contains the above - mentioned dye A and dye C and is used on the front surface of an image display device, it can suppress the reduction of relative brightness and show excellent color reproducibility. Although the reason for this is inferred, consider the following.

[0063] In a wavelength - selective absorption filter containing dye C having a main absorption wavelength band at 560 - 600 nm, the color reproduction region can be expanded compared to the case without dye, but for display light close to blue, it extends to a region outside the NTSC standard. Therefore, it is still insufficient to reproduce a color gamut that is important in actual use by only containing dye C and adjusting its content. Regarding this, it is considered that the wavelength - selective absorption filter of the present invention, by simultaneously containing the above - mentioned dye C and dye A having a main absorption wavelength band at 400 - 450 nm, hardly changes the area of the triangle formed by connecting on the xy chromaticity diagram in the CIE (International Commission on Illumination) 1931 xyY color system, and can adjust the chromaticity of the blue display light to the long - wavelength side. As a result, it can suppress the reduction of brightness due to the inclusion of the dye and improve the color reproducibility in an area that is important in actual use.

[0064] <Dye>

[0065] (Dye A)

[0066] Regarding dye A, as long as it is a dye that has a main absorption wavelength band at 400 - 450 nm and does not have fluorescence in the wavelength - selective absorption filter, there is no particular limitation, and various dyes can be used.

[0067] As the above-described dye A, from the viewpoint of the sharp absorption waveform in the main absorption wavelength band, a pigment represented by the following general formula (A1) is preferred.

[0068] The wavelength-selective absorption filter of the present invention uses a pigment represented by the general formula (A1) as the dye A, whereby it is possible to not only balance the suppression of the reduction in relative luminance and the improvement of color reproducibility, but also exhibit excellent light resistance.

[0069] [Chemical formula 2]

[0070]

[0071] In the general formula (A1), R 1 and R 2 each independently represents an alkyl group or an aryl group, and R 3 to R 6 each independently represents a hydrogen atom or a substituent, and R 5 and R 6 may be bonded to each other to form a 6-membered ring.

[0072] As the alkyl group that can be used as R 1 and R 2 either an unsubstituted alkyl group or a substituted alkyl group having a substituent may be used, and either a linear or branched form may be used, and it may also have a cyclic structure.

[0073] As the above-described unsubstituted alkyl group, for example, methyl, ethyl, n-propyl, isopropyl, and cyclohexyl can be cited. The number of carbon atoms of the above-described unsubstituted alkyl group is preferably 1 to 12, more preferably 1 to 6.

[0074] As the substituents that can be used for the above-described substituted alkyl group, for example, the substituents included in the following substituent group A can be cited.

[0075] (Substituent group A)

[0076] A halogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroatom-containing ring group, a cyano group, a hydroxyl group, a nitro group, a carboxyl group (which may be in the form of a salt), an alkoxy group, an aryloxy group, a silyloxy group, a heteroepoxy group, an acyloxy group, a carbamoyloxy group, a sulfonyloxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an amino group (in addition to -NH2, it also includes a substituted amino group represented by -NR a 2. R a each independently represents a hydrogen atom, an alkyl group, an aryl group, or a heteroaryl group. Among them, at least one R ais an alkyl group, an aryl group or a heteroaryl group.), an acylamino group, an aminocarbonylamino group, an alkylcarbonylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfamoylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a sulfonamido group, a mercapto group, an alkylthio group, an arylthio group, a heterocyclic thio group, a sulfamoyl group, a sulfo group (which may be in the form of a salt), an alkylsulfinyl group, an arylsulfinyl group, an alkylsulfonyl group, an arylsulfonyl group, an acyl group, an aryloxycarbonyl group, an alkoxycarbonyl group, a carbamoyl group, an imide group, a phosphino group, an oxyphosphino group, an oxyphosphinyloxy group, an oxyphosphinylamino group and a silyl group, and a monovalent group formed by linking at least two of them

[0077] Among the above substituent group A, preferred examples of the substituents that a substituted alkyl group may have include a halogen atom, an aryl group, an alkoxy group, an acyl group, and a hydroxyl group.

[0078] The total number of carbon atoms of the above substituted alkyl group is preferably 1 to 12. For example, benzyl, hydroxybenzyl, methoxyethyl, etc. can be cited.

[0079] The total number of carbon atoms of the substituted alkyl group refers to the total number of carbon atoms of the substituted alkyl group including the substituents that the substituted alkyl group may have. Hereinafter, the same meaning is used for other groups.

[0080] In addition, in R 1 and R 2 When both represent an alkyl group, the alkyl groups may be the same or different.

[0081] The aryl group that can be used as R 1 and R 2 can be either an unsubstituted aryl group or a substituted aryl group having substituents.

[0082] As the above unsubstituted aryl group, an aryl group having 6 to 12 carbon atoms is preferred. For example, a phenyl group can be cited.

[0083] As the substituents that can be adopted for the above substituted aryl group, for example, the substituents included in the above substituent group A can be cited.

[0084] Among the above substituent group A, preferred examples of the substituents that a substituted aryl group may have include a halogen atom (for example, a chlorine atom, a bromine atom, and an iodine atom), a hydroxyl group, a carboxyl group, a sulfonamido group, an amino group (preferably a substituted amino group represented by -NR a 2. R a each independently represents a hydrogen atom or an alkyl group. Among them, at least one R ais an alkyl group. The number of carbon atoms is preferably 1 to 4.), alkyl (preferably an alkyl group having 1 to 4 carbon atoms; for example, methyl, ethyl, n-propyl, and isopropyl), alkoxy (preferably an alkoxy group having 1 to 4 carbon atoms; for example, methoxy, ethoxy, n-propoxy, and isopropoxy), alkoxycarbonyl (preferably an alkoxycarbonyl group having 2 to 5 carbon atoms; for example, methoxycarbonyl, ethoxycarbonyl, n-propoxycarbonyl, and isopropoxycarbonyl), and sulfonyloxy, and a monovalent group formed by linking at least two of them.

[0085] As the above-mentioned substituted aryl group, an aryl group having a total of 6 to 18 carbon atoms is preferred.

[0086] For example, 4-chlorophenyl, 2,5-dichlorophenyl, hydroxyphenyl, 4-carboxyphenyl, 3,5-dicarboxyphenyl, 4-methanesulfonamidophenyl, 4-methylphenyl, 4-methoxyphenyl, 4-(2-hydroxyethoxy)phenyl, N,N-dimethylaminophenyl, 4-(N-carboxymethyl-N-ethylamino)phenyl, 4-ethoxycarbonylphenyl, and 4-methanesulfonyloxyphenyl can be cited.

[0087] In addition, when both R 1 and R 2 represent aryl groups, the aryl groups can be the same or different.

[0088] As the substituents that can be used for R 3 , R 4 , R 5 and R 6 , for example, the substituents included in the above-mentioned substituent group A can be cited.

[0089] In the above-mentioned substituent group A, R 3 , R 5 and R 6 are preferably alkyl or aryl. That is, as R 3 , R 5 and R 6 , it is preferred that each is independently a hydrogen atom, an alkyl group, or an aryl group.

[0090] And, in the above-mentioned substituent group A, R 4 is preferably alkyl or aryl. That is, as R 4 , it is preferably a hydrogen atom, an alkyl group, or an aryl group.

[0091] As the alkyl group that can be used for R 3 , R 5 and R 6 , it can be either an unsubstituted alkyl group or a substituted alkyl group having a substituent, either linear or branched, and can also have a cyclic structure.

[0092] As the above-mentioned R that can be used3 , R 5 and R 6 unsubstituted alkyl groups of 3 , R 5 and R 6 are exemplified by methyl, ethyl, n-propyl, isopropyl, etc. The unsubstituted alkyl groups used as the above R

[0093] As the substituents that the substituted alkyl groups in the above R 3 , R 5 and R 6 may have, for example, the substituents included in the above substituent group A can be cited.

[0094] As the preferred examples of the substituents that the substituted alkyl groups in the above R 3 , R 5 and R 6 may have, aryl (preferably phenyl), halogen atom, acyl group, amino group, alkoxycarbonyl group, carboxyl group, and hydroxyl group can be cited.

[0095] The total number of carbon atoms of the substituted alkyl groups used as the above R 3 , R 5 and R 6 is preferably 1 to 8. For example, benzyl, carboxymethyl, and hydroxymethyl can be cited.

[0096] In addition, when R 3 , R 5 and R 6 all represent alkyl groups, the alkyl groups can be the same or different.

[0097] As the aryl group that can be used as the above R 3 , R 5 and R 6 can be either an unsubstituted aryl group or a substituted aryl group.

[0098] As the unsubstituted aryl group that can be used as the above R 3 , R 5 and R 6 , an aryl group having 6 to 10 carbon atoms is preferred. For example, phenyl can be cited.

[0099] As the substituents that the substituted aryl groups in the above R 3 , R 5 and R 6 may have, for example, the substituents included in the above substituent group A can be cited.

[0100] As the above R 3 , R 5 and R 6Preferred examples of the substituents that the substituted aryl in [it] may have include a halogen atom (for example, a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom), a hydroxyl group, a carboxyl group, and an alkyl group (preferably an alkyl group having 1 to 4 carbon atoms; for example, a methyl group, an ethyl group, a n-propyl group, and an isopropyl group).

[0101] As the substituted aryl that can be used as the above R 3 , R 5 and R 6 , an aryl group having 6 to 10 carbon atoms in total is preferred. For example, 2-fluorophenyl, 4-chlorophenyl, 2,5-dichlorophenyl, hydroxyphenyl, carboxyphenyl, 3,5-dicarboxyphenyl, and 4-methylphenyl can be mentioned.

[0102] When both R 5 and R 6 are substituents, from the viewpoints of light resistance and heat resistance, R 3 is preferably a hydrogen atom.

[0103] In addition, when both R 3 , R 5 and R 6 are aryl groups, the aryl groups may be the same or different.

[0104] The alkyl group that can be used as R 4 can be either an unsubstituted alkyl group or a substituted alkyl group having a substituent, can be either linear or branched, and can also have a cyclic structure.

[0105] As the unsubstituted alkyl group that can be used as the above R 4 , for example, a methyl group, an ethyl group, a n-propyl group, an isopropyl group, and a cyclohexyl group can be mentioned. The number of carbon atoms of the unsubstituted alkyl group that can be used as the above R 4 is preferably 1 to 8, more preferably 1 to 4.

[0106] As the substituent that the substituted alkyl in the above R 4 may have, for example, the substituents included in the above substituent group A can be mentioned.

[0107] As the above R 4Preferred examples of the substituents that the substituted alkyl in [it] may have include aryl (preferably phenyl), heteroatom-containing ring group, carboxyl group, hydroxyl group, alkyl group (preferably an alkyl group having 1 to 4 carbon atoms; for example, methyl, ethyl, n-propyl and isopropyl), alkoxy group (preferably an alkoxy group having 1 to 4 carbon atoms; for example, methoxy, ethoxy, n-propoxy and isopropoxy), aryloxy group, alkoxycarbonyl group (preferably an alkoxycarbonyl group having 2 to 5 carbon atoms; for example, methoxycarbonyl, ethoxycarbonyl, n-propoxycarbonyl and isopropoxycarbonyl), alkylamino group (preferably an alkylamino group having 1 to 4 carbon atoms; for example, dimethylamino), alkylcarbonylamino group (preferably an alkylcarbonylamino group having 1 to 4 carbon atoms; for example, methylcarbonylamino), cyano group and acyl group (for example, acetyl, propionyl, benzoyl, methanesulfonyl), and monovalent groups formed by linking at least two of them.

[0108] The substituted alkyl that can be used as the above R 4 Preferably has a total carbon atom number of 1 to 18.

[0109] For example, benzyl, carboxybenzyl, hydroxybenzyl, methoxycarbonylethyl, ethoxycarbonylmethyl, 2-cyanoethyl, 2-propionamidoethyl, dimethylaminomethyl, methylcarbonylaminopropyl, bis(methoxycarbonylmethyl)aminopropyl and phenacyl can be cited.

[0110] The aryl that can be used as the above R 4 can be either unsubstituted aryl or substituted aryl having substituents.

[0111] As the unsubstituted aryl that can be used as the above R 4 preferably has 6 to 12 carbon atoms, and for example, phenyl can be cited.

[0112] As the substituents that the substituted aryl in the above R 4 may have, for example, the substituents included in the above substituent group A can be cited.

[0113] As the preferred examples of the substituents that the substituted aryl in the above R 4 may have, halogen atoms (for example, chlorine atom, bromine atom, iodine atom), hydroxyl group, carboxyl group, sulfonamido group, amino group, alkyl group (preferably an alkyl group having 1 to 4 carbon atoms; for example, methyl, ethyl, n-propyl, isopropyl), alkoxy group (preferably an alkoxy group having 1 to 4 carbon atoms; for example, methoxy, ethoxy, n-propoxy, isopropoxy), alkoxycarbonyl group (preferably an alkoxycarbonyl group having 2 to 5 carbon atoms; for example, methoxycarbonyl, ethoxycarbonyl, n-propoxycarbonyl, isopropoxycarbonyl) and sulfonyloxy group, and monovalent groups formed by linking at least two of them, etc. can be cited.

[0114] The above R4 The amino group that the substituted aryl in a may have can be an unsubstituted amino group (-NH2) or a substituted amino group having a substituent ( -NR in the above substituent group A

[0115] Any of 4 the -NR a in the substituted aryl that may have in a As 4 R, a group the same as the substituted alkyl in the above

[0116] As the above substituted amino group, an alkylamino group in which one or two hydrogen atoms of the amino group are preferably substituted by an alkyl group is preferred.

[0117] As the alkylamino group, for example, methylamino, dimethylamino, diethylamino, and pyrrolidino can be cited. The number of carbon atoms of the alkylamino group is preferably 1 to 8, more preferably 1 to 4.

[0118] Moreover, the alkyl in the alkylamino group may be further substituted. For example, bis(alkoxycarbonylalkyl)amino can be preferably cited. The number of carbon atoms of bis(alkoxycarbonylalkyl)amino is preferably 6 to 10, more preferably 6 to 8.

[0119] As the substituted aryl that can be used as the above 4 R, an aryl group having 6 to 22 carbon atoms in total is preferred. For example, 4-chlorophenyl, 2,5-dichlorophenyl, hydroxyphenyl, 2,5-methoxyphenyl, 2-methoxy-5-ethoxycarbonylphenyl, 4-ethoxycarbonylphenyl, 4-ethoxycarbonylphenyl, 4-butoxycarbonylphenyl, 4-octyloxycarbonylphenyl, 4-carboxyphenyl, 3,5-dicarboxyphenyl, 4-methanesulfamidophenyl, 4-methylphenyl, 4-methoxyphenyl, 4-ethoxyphenyl, 4-(2-hydroxyethoxy)phenyl, N,N-dimethylaminophenyl, N,N-diethylaminophenyl, 4-(N-carboxymethyl-N-ethylamino)phenyl, 4-{N,N-bis(ethoxycarbonylmethyl)amino}phenyl, 4-{bis(ethoxycarbonylmethyl)amino}carbonylphenyl, 4-ethoxycarbonylphenyl, 4-methanesulfonyloxyphenyl, 4-acetylaminosulfonylphenyl, 4-propionylaminosulfonylphenyl, and 4-methanesulfamidophenyl can be cited.

[0120] R 5 and R 6 can bond to each other to form a 6-membered ring. A hydrogen atom may be detached during ring formation to form an aromatic ring or an aliphatic ring having an unsaturated bond.

[0121] R 5 and R 6 The 6-membered ring formed by bonding to each other is preferably a benzene ring.

[0122] In particular, from the viewpoint of light resistance, R in the general formula (A1) is preferably 1 and R 2 in R 1 is an alkyl group, and more preferably R 1 is an alkyl group, and R 2 is an alkyl group or an aryl group. Also, from the same viewpoint, it is further preferred that R 1 and R 2 are each independently an alkyl group, and particularly preferably an alkyl group having 1 to 8 carbon atoms.

[0123] Also, from the viewpoints of heat resistance and light resistance, R in the general formula (A1) is preferably 1 and R 2 are both aryl groups.

[0124] When R 1 and R 2 each independently represent an aryl group, it is preferred that R 3 , R 5 and R 6 each independently represent a hydrogen atom, an alkyl group or an aryl group, and at least one of R 3 and R 6 is a hydrogen atom. Among them, from the viewpoints of heat resistance and light resistance, it is more preferred that R 3 represents a hydrogen atom, and R 5 and R 6 each independently represent an alkyl group or an aryl group. Further preferably, R 3 represents a hydrogen atom, and R 5 and R 6 each independently represent an alkyl group. Particularly preferably, R 3 represents a hydrogen atom, R 5 and R 6 each independently represent an alkyl group, and R 5 and R 6 are bonded to each other to form a ring and condensed with a pyrrole ring to form an indole ring. That is, the pigment represented by the above general formula (A1) is particularly preferably the pigment represented by the following general formula (A2).

[0125] [Chemical formula 3]

[0126]

[0127] In the general formula (A2), R 1 to R 4 respectively have the same meanings as R 1 to R 4 in the general formula (A1), and the preferred modes are also the same.

[0128] In the general formula (A2), R15 represents a substituent. As the substituent that can be used as R 15 , the substituents included in the above-mentioned substituent group A can be cited. As R 15 , an alkyl group, an aryl group, a halogen atom, an acyl group, an amino group, or an alkoxycarbonyl group is preferred.

[0129] The alkyl group and aryl group that can be used as R 15 can respectively apply the descriptions of the alkyl group and aryl group that can be used as R 3 , R 5 and R 6 .

[0130] As the halogen atom that can be used as R 15 , for example, a chlorine atom, a bromine atom, and an iodine atom can be cited.

[0131] As the acyl group that can be used as R 15 , for example, an acetyl group, a propionyl group, and a butyryl group can be cited.

[0132] As the amino group that can be used as R 15 , the description of the amino group that the substituted aryl group in R 4 can have can be applied. Also, a 5- to 7-membered nitrogen-containing heterocyclic group in which an alkyl group is bonded to the nitrogen atom of the amino group to form a ring is preferred.

[0133] As the alkoxycarbonyl group that can be used as R 15 , an alkoxycarbonyl group having 2 to 5 carbon atoms is preferred. For example, a methoxycarbonyl group, an ethoxycarbonyl group, a n-propoxycarbonyl group, and an isopropoxycarbonyl group can be cited.

[0134] n is an integer from 0 to 4. n is not particularly limited, but for example, 0 or 1 is preferred.

[0135] Hereinafter, specific examples of the pigment represented by the general formula (A1) are shown. However, the present invention is not limited to these.

[0136] In the following specific examples, Me represents a methyl group.

[0137] [Chemical formula 4]

[0138]

[0139] [Chemical formula 5]

[0140]

[0141] [Chemical formula 6]

[0142]

[0143] As Dye A, in addition to the pigment represented by the general formula (A1), it is also possible to preferably use the compounds described in paragraphs 0012 to 0067 of Japanese Patent Laid-Open No. 5-53241 and the compounds described in paragraphs 0011 to 0076 of Japanese Patent No. 2707371.

[0144] The main absorption wavelength band that Dye A has in the wavelength-selective absorption filter is preferably 400 to 430 nm.

[0145] (Dye C)

[0146] Regarding Dye C, as long as it is a dye that has a main absorption wavelength band at a wavelength of 560 to 600 nm in the wavelength-selective absorption filter and does not have fluorescence, there is no particular limitation, and various dyes can be used.

[0147] As specific examples of Dye C, for example, there can be cited various pigments (dyes) of the tetraaza porphyrin (TAP) type, squarylium type, and cyanine (CY) type.

[0148] Among them, as the above-mentioned Dye C, from the viewpoint of the sharp absorption waveform in the main absorption wavelength band, squarylium pigments are preferred, and squarylium pigments represented by the following general formula (1) are more preferred. As Dye C, as described above, by using pigments with a sharp absorption waveform, it is possible to suppress the reduction in brightness while expanding the color reproduction region.

[0149] In the present invention, in the pigments represented by the following general formulas, the cations exist in a delocalized manner, and there are multiple tautomeric structures. Therefore, in the present invention, when at least one tautomeric structure of certain pigments is applicable to each general formula, a certain pigment is defined as the pigment represented by each general formula. Therefore, a pigment represented by a specific general formula can also be referred to as a pigment capable of representing at least one of its tautomeric structures by the specific general formula. In the present invention, regarding the pigments represented by the general formula, any tautomeric structure can be adopted as long as at least one of its tautomeric structures is applicable to the general formula.

[0150] [Chemical formula 7]

[0151]

[0152] In the general formula (1), A and B each independently represent an aryl group that may have a substituent, a heterocyclic group that may have a substituent, or -CH = G. G represents a heterocyclic group that may have a substituent.

[0153] The aryl group that can be used as A or B is not particularly limited and can be a group containing a single ring or a group containing a fused ring. The number of carbon atoms of the aryl group is preferably 6 to 30, more preferably 6 to 20, and still more preferably 6 to 12. As the aryl group, for example, groups containing a benzene ring or a naphthalene ring can be cited, and a group containing a benzene ring is more preferred.

[0154] The heterocyclic group that can be used as A or B is not particularly limited and includes groups containing an aliphatic heterocycle or an aromatic heterocycle, and a group containing an aromatic heterocycle is preferred. As the heteroaryl group of the aromatic heterocyclic group, for example, the heteroaryl groups that can be used as the substituent X described below can be cited. The aromatic heterocyclic group that can be used as A or B is preferably a 5-membered ring or 6-membered ring group, and more preferably a nitrogen-containing 5-membered ring group. Specifically, groups containing any one of a pyrrole ring, a furan ring, a thiophene ring, an imidazole ring, a pyrazole ring, a thiazole ring, an oxazole ring, a triazole ring, an indole ring, a pseudoindole ring, an indoline ring, a pyridine ring, a pyrimidine ring, a quinoline ring, a benzothiazole ring, a benzoxazole ring, and a pyrazolotriazole ring can be preferably cited. Among them, a group containing any one of a pyrrole ring, a pyrazole ring, a thiazole ring, a pyridine ring, a pyrimidine ring, and a pyrazolotriazole ring is preferred. Pyrazolotriazole contains a fused ring of a pyrazole ring and a triazole ring, and as long as it is a fused ring formed by at least one-by-one fusion of these rings, for example, the fused rings in the following general formulas (4) and (5) can be cited.

[0155] A and B can be bonded to any position (ring-constituting atom) relative to the squarylium acid moiety (the 4-membered ring represented by the general formula (1)) without particular limitation, but are preferably bonded to a carbon atom.

[0156] In -CH=G that can be used as A or B, G represents a heterocyclic group that may have a substituent. For example, the examples shown for the heterocyclic group that can be used as A or B above can be preferably cited. Among them, groups containing any one of a benzoxazole ring, a benzothiazole ring, and an indoline ring are preferred.

[0157] At least one of A and B may have a hydrogen-bonding group that forms a hydrogen bond in the molecule.

[0158] A, B, and G may each have a substituent X. When having a substituent X, adjacent substituents may bond to each other to further form a ring structure. And, there may be multiple substituents X.

[0159] As the substituent X, for example, the substituent of R in the following general formula (2) can be cited 1 Specifically, a halogen atom, a cyano group, a nitro group, an alkyl group (including a cycloalkyl group), an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an aralkyl group, a ferrocenyl group, -OR 10 , -C(=O)R 11 , -C(=O)OR 12, -OC(=O)R 13 , -NR 14 R 15 , -NHCOR 16 , -CONR 17 R 18 , -NHCONR 19 R 20 , -NHCOOR 21 , -SR 22 , -SO2R 23 , -SO3R 24 , -NHSO2R 25 and -SO2NR 26 R 27 . Further, in addition to the above ferrocenyl group, the substituent X preferably also has a quencher moiety described below.

[0160] In the general formula (1), R 10 ~R 27 each independently represents a hydrogen atom, an aliphatic group, an aromatic group or a heteroatom-containing ring group. The aliphatic groups and aromatic groups that can be used as R 10 ~R 27 are not particularly limited, and can be appropriately selected from alkyl groups, cycloalkyl groups, alkenyl groups and alkynyl groups classified as aliphatic groups among the substituents of R 1 in the general formula (2) described below, and aryl groups classified as aromatic groups. The heteroatom-containing ring groups that can be used as R 10 ~R 27 can be aliphatic or aromatic. For example, they can be appropriately selected from heteroaryl groups or heteroatom-containing ring groups of R 1 in the general formula (2) described below.

[0161] In addition, in the case where R 12 in -COOR 12 is a hydrogen atom (i.e., a carboxyl group), the hydrogen atom can dissociate (i.e., a carbonate group), or can be in a salt state. And in the case where R 24 in -SO3R 24 is a hydrogen atom (i.e., a sulfo group), the hydrogen atom can dissociate (i.e., a sulfonate group), or can be in a salt state.

[0162] Examples of the halogen atom that can be used as the substituent X include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom.

[0163] The number of carbon atoms of the alkyl group that can be used as the substituent X is preferably 1 to 20, more preferably 1 to 15, and further preferably 1 to 8. The number of carbon atoms of the alkenyl group is preferably 2 to 20, more preferably 2 to 12, and further preferably 2 to 8. The number of carbon atoms of the alkynyl group is preferably 2 to 40, more preferably 2 to 30, and particularly preferably 2 to 25. The alkyl group, alkenyl group, and alkynyl group can each be any of linear, branched, and cyclic, and are preferably linear or branched.

[0164] The aryl group that can be used as the substituent X includes monocyclic or fused-ring groups. The number of carbon atoms of the aryl group is preferably 6 to 30, more preferably 6 to 20, and further preferably 6 to 12.

[0165] The alkyl moiety of the aralkyl group that can be used as the substituent X is the same as the above alkyl group. The aryl moiety of the aralkyl group is the same as the above aryl group. The number of carbon atoms of the aralkyl group is preferably 7 to 40, more preferably 7 to 30, and further preferably 7 to 25.

[0166] The heteroaryl group that can be used as the substituent X includes groups containing monocyclic or fused-ring groups, preferably groups containing monocyclic or fused rings with 2 to 8 rings, more preferably groups containing monocyclic or fused rings with 2 to 4 rings. The number of heteroatoms in the ring constituting the heteroaryl group is preferably 1 to 3. Examples of the heteroatoms in the ring constituting the heteroaryl group include nitrogen atoms, oxygen atoms, or sulfur atoms. The heteroaryl group preferably includes groups containing 5-membered rings or 6-membered rings. The number of carbon atoms in the ring constituting the heteroaryl group is preferably 3 to 30, more preferably 3 to 18, and further preferably 3 to 12. Examples of the heteroaryl group include groups containing any one of a pyridine ring, a piperidine ring, a furan ring, a furfuran ring, a thiophene ring, a pyrrole ring, a quinoline ring, a morpholine ring, an indole ring, an imidazole ring, a pyrazole ring, a carbazole ring, a phenothiazine ring, a phenoxazine ring, an indoline ring, a thiazole ring, a pyrazine ring, a thiadiazine ring, a benzoquinoline ring, and a thiadiazole ring.

[0167] The ferrocenyl group that can be used as the substituent X is preferably represented by the general formula (2M).

[0168] [Chemical formula 8]

[0169]

[0170] In the general formula (2M), L represents a single bond or a divalent linking group that is not conjugated to A, B, or G in the general formula (1). R 1m ~R 9m each represent a hydrogen atom or a substituent. M is an atom that can form a metallocene compound and represents Fe, Co, Ni, Ti, Cu, Zn, Zr, Cr, Mo, Os, Mn, Ru, Sn, Pd, Rh, V, or Pt. * represents the bonding portion to A, B, or G.

[0171] In addition, in the present invention, when L in the general formula (2M) is a single bond, the cyclopentadiene ring directly bonded to A, B or G (the ring having R in the general formula (2M)) is not included in the conjugated structure conjugated with A, B or G. 1m The ring) is not included in the conjugated structure conjugated with A, B or G.

[0172] As the divalent linking group that can be used as L, as long as it is a linking group that is not conjugated with A, B or G, there is no particular limitation, and the above conjugated structure can be included inside or at the end of the cyclopentadiene ring side in the general formula (2M). As the divalent linking group, for example, an alkylene group having 1 to 20 carbon atoms, an arylene group having 6 to 20 carbon atoms, a divalent heterocyclic group obtained by removing 2 hydrogens from a heterocycle, -CH=CH-, -CO-, -CS-, -NR- (R represents a hydrogen atom or a monovalent substituent), -O-, -S-, -SO2- or -N=CH- or a divalent linking group formed by combining a plurality of them (preferably 2 to 6). It is preferably a group selected from the group consisting of an alkylene group having 1 to 8 carbon atoms, an arylene group having 6 to 12 carbon atoms, -CH=CH-, -CO-, -NR- (R is as described above), -O-, -S-, -SO2- and -N=CH- or a divalent linking group formed by combining two or more (preferably 2 to 6) groups selected from this group, and particularly preferably a group selected from the group consisting of an alkylene group having 1 to 4 carbon atoms, a phenylene group, -CO-, -NH-, -O- and -SO2- or a linking group formed by combining two or more (preferably 2 to 6) groups selected from this group. As the combined divalent linking group, there is no particular limitation, but a group containing -CO-, -NH-, -O- or -SO2- is preferred, and examples include a linking group formed by combining two or more of -CO-, -NH-, -O- or -SO2-, or a linking group formed by combining at least one of -CO-, -NH-, -O- and -SO2- with an alkylene group or an arylene group. As the linking group formed by combining two or more of -CO-, -NH-, -O- or -SO2-, -COO-, -OCO-, -CONH-, -NHCOO-, -NHCONH-, -SO2NH- can be cited. As the linking group formed by combining at least one of -CO-, -NH-, -O- and -SO2- with an alkylene group or an arylene group, a group formed by combining -CO-, -COO- or -CONH- with an alkylene group or an arylene group can be cited.

[0173] The substituent that can be used as R is not particularly limited and has the same meaning as the substituent X that A in the general formula (2) can have.

[0174] L is preferably a single bond, or a group selected from the group consisting of an alkylene group having 1 to 8 carbon atoms, an arylene group having 6 to 12 carbon atoms, -CH=CH-, -CO-, -NR- (R is as described above), -O-, -S-, -SO2- and -N=CH-, or a group formed by combining two or more groups selected from this group.

[0175] L may have one or more substituents. There is no particular limitation on the substituents that L may have. For example, they have the same meaning as the above-mentioned substituent X. When L has a plurality of substituents, the substituents bonded to adjacent atoms may be bonded to each other to further form a ring structure.

[0176] As the alkylene group that can be used as L, as long as it is a group within the range of 1 to 20 carbon atoms, it can be any of linear, branched or cyclic. For example, methylene, ethylene, propylene, methylethylene, methylmethylene, dimethylmethylene, 1,1-dimethylethylene, butylene, 1-methylpropylene, 2-methylpropylene, 1,2-dimethylpropylene, 1,3-dimethylpropylene, 1-methylbutylene, 2-methylbutylene, 3-methylbutylene, 4-methylbutylene, 2,4-dimethylbutylene, 1,3-dimethylbutylene, pentylene, hexylene, heptylene, octylene, ethane-1,1-diyl, propane-2,2-diyl, cyclopropane-1,1-diyl, cyclopropane-1,2-diyl, cyclobutane-1,1-diyl, cyclobutane-1,2-diyl, cyclopentane-1,1-diyl, cyclopentane-1,2-diyl, cyclopentane-1,3-diyl, cyclohexane-1,1-diyl, cyclohexane-1,2-diyl, cyclohexane-1,3-diyl, cyclohexane-1,4-diyl, methylcyclohexane-1,4-diyl, etc. can be cited.

[0177] As L, when a linking group containing at least one of -CO-, -CS-, -NR- (R is as described above), -O-, -S-, -SO2- and -N=CH- is used in the alkylene group, groups such as -CO- can be introduced into any position in the alkylene group, and the number introduced is not particularly limited.

[0178] As the arylene group that can be used as L, as long as it is a group within the range of 6 to 20 carbon atoms, there is no particular limitation. For example, groups obtained by further removing one hydrogen atom from each of the groups exemplified as the aryl group having 6 to 20 carbon atoms that can be used as A in the general formula (1) can be cited.

[0179] As the heterocyclic group that can be used as L, there is no particular limitation. For example, groups obtained by further removing one hydrogen atom from each of the groups exemplified as the heterocyclic group that can be used as the above-mentioned A can be cited.

[0180] In the general formula (2M), the remaining partial structure obtained by removing the above-mentioned linking group L is equivalent to the structure formed by removing one hydrogen atom from the metallocene compound (metallocene structure part). In the present invention, as the metallocene compound of the metallocene structure part, as long as it is a compound conforming to the partial structure defined by the above general formula (2M) (a compound in which a hydrogen atom is bonded in place of L), known metallocene compounds can be used without particular limitation. Hereinafter, the metallocene structure part defined by the general formula (2M) will be specifically described.

[0181] In the general formula (2M), R 1m ~R 9m each represent a hydrogen atom or a substituent. As the substituent that can be used as R 1m ~R 9m , there is no particular limitation, but for example, it can be selected from the substituents that can be used as R 1 of the general formula (3). R 1m ~R 9m are each preferably a hydrogen atom, a halogen atom, an alkyl group, an acyl group, an alkoxy group, an amino group or an amide group, more preferably a hydrogen atom, a halogen atom, an alkyl group, an acyl group or an alkoxy group, still more preferably a hydrogen atom, a halogen atom, an alkyl group or an acyl group, particularly preferably a hydrogen atom, a halogen atom or an alkyl group, and most preferably a hydrogen atom.

[0182] As the alkyl group that can be used as R 1m ~R 9m , among the alkyl groups that can be used as R 1 , an alkyl group having 1 to 8 carbon atoms is preferred. For example, methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, isobutyl, pentyl, tert-pentyl, hexyl, octyl, 2-ethylhexyl can be cited.

[0183] This alkyl group may have a halogen atom as a substituent. As the alkyl group substituted by a halogen atom, for example, chloromethyl, dichloromethyl, trichloromethyl, bromomethyl, dibromomethyl, tribromomethyl, fluoromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trifluoroethyl, perfluoroethyl, perfluoropropyl, perfluorobutyl, etc. can be cited.

[0184] And, the alkyl group that can be used as R 1mIn the alkyl groups such as etc., at least one methylene group forming the carbon chain may be substituted with -O- or -CO-. As the alkyl group in which the methylene group is substituted with -O-, for example, methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, tert-butoxy, 2-methoxyethoxy, chloromethoxy, dichloromethoxy, trichloromethoxy, bromomethoxy, dibromomethoxy, tribromomethoxy, fluoromethoxy, difluoromethoxy, trifluoromethoxy, 2,2,2-trifluoroethoxy, perfluoroethoxy, perfluoropropoxy, perfluorobutoxy in which the terminal methylene group is substituted, and alkyl groups in which the internal methylene group of the carbon chain such as 2-methoxyethyl is substituted, etc. are exemplified. As the alkyl group in which the methylene group is substituted with -CO-, for example, acetyl, propionyl, monochloroacetyl, dichloroacetyl, trichloroacetyl, trifluoroacetyl, propane-2-one-1-yl, butane-2-one-1-yl, etc. are exemplified.

[0185] In the general formula (2M), M is an atom that can form a metallocene compound, and represents Fe, Co, Ni, Ti, Cu, Zn, Zr, Cr, Mo, Os, Mn, Ru, Sn, Pd, Rh, V or Pt. Among them, M is preferably Fe, Ti, Co, Ni, Zr, Ru or Os, more preferably Fe, Ti, Ni, Ru or Os, further preferably Fe or Ti, and most preferably Fe.

[0186] As the group represented by the general formula (2M), it is preferable to combine the preferable forms of L, R 1m ~R 9m and M with each other. For example, a group formed by combining a single bond as L or a group selected from the group consisting of alkylene groups having 2 to 8 carbon atoms, arylene groups having 6 to 12 carbon atoms, -CH=CH-, -CO-, -NR- (R is as described above), -O-, -S-, -SO2- and -N=CH- or a group formed by combining two or more groups selected from this group, a hydrogen atom, a halogen atom, an alkyl group, an acyl group or an alkoxy group as R 1m ~R 9m and a group formed by combining Fe as M are exemplified.

[0187] The alkyl group, alkenyl group, alkynyl group, aralkyl group, aryl group and heteroaryl group that can be used as the substituent X, and R 10 ~R 27The aliphatic group, aromatic group, and heteroatom-containing ring group may each further have a substituent or may be unsubstituted. The substituent that may further be present is not particularly limited, but is preferably selected from substituents such as an alkyl group, aryl group, amino group, alkoxy group, aryloxy group, aromatic heteroepoxy group, acyl group, alkoxycarbonyl group, aryloxycarbonyl group, acyloxy group, acylamino group, alkoxycarbonylamino group, aryloxycarbonylamino group, sulfonylamino group, alkylthio group, arylthio group, aromatic heterocyclic thio group, sulfonyl group, ferrocenyl group, hydroxyl group, mercapto group, halogen atom, cyano group, sulfo group, and carboxyl group, and more preferably selected from substituents such as an alkyl group, aryl group, alkoxy group, aryloxy group, aromatic heteroepoxy group, acyl group, alkoxycarbonyl group, aryloxycarbonyl group, acyloxy group, alkylthio group, arylthio group, aromatic heterocyclic thio group, sulfonyl group, ferrocenyl group, hydroxyl group, mercapto group, halogen atom, cyano group, sulfo group, and carboxyl group. These groups can be appropriately selected from the substituents that can be used for R in the following general formula (2). 1 of the substituents.

[0188] As a preferred embodiment of the pigment represented by the above general formula (1), a pigment represented by the following general formula (2) can be mentioned.

[0189] [Chemical formula 9]

[0190] General formula (2)

[0191] In general formula (2), A 1 is the same as A in general formula (1). Among them, a nitrogen-containing 5-membered heterocyclic group is preferred.

[0192] In general formula (2), R 1 and R 2 each independently represent a hydrogen atom or a substituent. R 1 and R 2 may be the same or different from each other, and may be bonded to each other to form a ring.

[0193] As those that can be used as R 1 and R 2The substituents are not particularly limited. For example, alkyl groups (such as methyl, ethyl, propyl, isopropyl, butyl, tert-butyl, isobutyl, pentyl, hexyl, octyl, dodecyl, trifluoromethyl, etc.), cycloalkyl groups (such as cyclopentyl, cyclohexyl, etc.), alkenyl groups (such as vinyl, allyl, etc.), alkynyl groups (such as ethynyl, propargyl, etc.), aryl groups (such as phenyl, naphthyl, etc.), heteroaryl groups (such as furyl, thienyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, triazinyl, imidazolyl, pyrazolyl, thiazolyl, benzimidazolyl, benzoxazolyl, quinazolinyl, phthalazinyl, etc.), heterocyclic groups containing heteroatoms (also referred to as heterocyclic groups. For example,Pyrrolidinyl, imidazolidinyl, morpholinyl, oxazolidinyl, etc.), alkoxy (methoxy, ethoxy, propoxy, etc.), cycloalkoxy (cyclopentyloxy, cyclohexyloxy, etc.), aryloxy (phenyloxy, naphthyloxy, etc.), heteroaryloxy (aromatic heteroepoxy group), alkylthio (methylthio, ethylthio, propylthio, etc.), cycloalkylthio (cyclopentylthio, cyclohexylthio, etc.), arylthio (phenylthio, naphthylthio, etc.), heteroarylthio (aromatic heterocyclic thio group), alkoxycarbonyl (methoxycarbonyl, ethoxycarbonyl, butoxycarbonyl, octyloxycarbonyl, etc.), aryloxycarbonyl (phenyloxycarbonyl, naphthyloxycarbonyl, etc.), phosphoryl (dimethoxyphosphoryl, diphenylphosphoryl), sulfamoyl (aminosulfonyl, methylaminosulfonyl, dimethylaminosulfonyl, butylaminosulfonyl, cyclohexylaminosulfonyl, octylaminosulfonyl, phenylaminosulfonyl, 2-pyridylaminosulfonyl, etc.), acyl (acetyl, ethylcarbonyl, propylcarbonyl, cyclohexylcarbonyl, octylcarbonyl, 2-ethylhexylcarbonyl, phenylcarbonyl, naphthylcarbonyl, pyridylcarbonyl, etc.), acyloxy (acetoxy, ethylcarbonyloxy, butylcarbonyloxy, octylcarbonyloxy, phenylcarbonyloxy, etc.), amide (methylcarbonylamino, ethylcarbonylamino, dimethylcarbonylamino, propylcarbonylamino, pentylcarbonylamino, cyclohexylcarbonylamino, 2-ethylhexylcarbonylamino, octylcarbonylamino, dodecylcarbonylamino, phenylcarbonylamino, naphthylcarbonylamino, etc.), sulfonamide (methylsulfonylamino, octylsulfonylamino, 2-ethylhexylsulfonylamino, trifluoromethylsulfonylamino, etc.), carbamoyl (aminocarbonyl, methylaminocarbonyl, dimethylaminocarbonyl, propylaminocarbonyl, pentylaminocarbonyl, cyclohexylaminocarbonyl, octylaminocarbonyl, 2-ethylhexylaminocarbonyl, dodecylaminocarbonyl, phenylaminocarbonyl, naphthylaminocarbonyl, 2-pyridylaminocarbonyl, etc.), ureido (methylureido, ethylureido, pentylureido, cyclohexylureido, octylureido, dodecylureido, phenylureido, naphthylureido, 2-pyridylaminoureido, etc.), alkylsulfonyl (methylsulfonyl, ethylsulfonyl, butylsulfonyl, cyclohexylsulfonyl, 2-ethylhexylsulfonyl, etc.), arylsulfonyl (phenylsulfonyl, naphthylsulfonyl, 2-pyridylsulfonyl, etc.), amino (amino, ethylamino, dimethylamino, butylamino, dibutylamino, cyclopentylamino, 2-ethylhexylamino, dodecylamino, phenylamino, naphthylamino, 2-pyridylamino, etc.), alkylsulfonyloxy (methanesulfonyloxy), cyano, nitro, halogen atom (fluorine atom, chlorine atom, bromine atom, etc.), hydroxyl group, etc.

[0194] Among them, alkyl, alkenyl, aryl or heteroaryl is preferred, alkyl, aryl or heteroaryl is more preferred, and alkyl is further preferred.

[0195] Can be used as R 1 and R 2The substituents may further have substituents. Examples of the substituents that may further be present include those that can be used as R 1 and R 2 in the above-mentioned substituents. R 1 and R 2 may bond to each other or to the substituents possessed by B 2 or B 3 to form a ring. The ring formed in this case is preferably a heterocyclic ring or a heteroaryl ring. The size of the ring formed is not particularly limited, but is preferably a 5-membered ring or a 6-membered ring.

[0196] In the general formula (2), B 1 , B 2 , B 3 and B 4 each independently represent a carbon atom or a nitrogen atom. The ring containing B 1 , B 2 , B 3 and B 4 is an aromatic ring. Preferably, at least two of B 1 to B 4 are carbon atoms, and more preferably all of B 1 to B 4 are carbon atoms.

[0197] The carbon atoms that can be used as B 1 to B 4 have a hydrogen atom or a substituent. The number of carbon atoms having a substituent among the carbon atoms that can be used as B 1 to B 4 is not particularly limited, but is preferably 0, 1, or 2, and more preferably 1. In particular, it is preferred that B 1 and B 4 are carbon atoms and at least one of them has a substituent.

[0198] Examples of the substituents that can be present on the carbon atoms that can be used as B 1 to B 4 are not particularly limited, and include those that can be used as R 1 and R 2 in the above-mentioned substituents. Among them, alkyl, alkoxy, alkoxycarbonyl, aryl, acyl, amide, sulfonamide, carbamoyl, alkylsulfonyl, arylsulfonyl, amino, cyano, nitro, halogen atom, or hydroxyl group is preferred, and alkyl, alkoxy, alkoxycarbonyl, aryl, acyl, amide, sulfonamide, carbamoyl, amino, cyano, nitro, halogen atom, or hydroxyl group is more preferred.

[0199] Examples of the substituents that can be present on the carbon atoms that can be used as B 1 and B 4The substituents of the carbon atoms are further preferably an alkyl group, an alkoxy group, a hydroxyl group, an amide group, a sulfonamide group or a carbamoyl group, particularly preferably an alkyl group, an alkoxy group, a hydroxyl group, an amide group or a sulfonamide group, and most preferably a hydroxyl group, an amide group or a sulfonamide group.

[0200] As those that can be used as B 2 and B 3 The substituents of the carbon atoms are further 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 particularly preferably any 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).

[0201] The pigment represented by the above general formula (2) is preferably a pigment represented by any one of the following general formula (3), general formula (4) and general formula (5).

[0202] [Chemical formula 10]

[0203] General formula (3)

[0204] In general formula (3), R 1 and R 2 each independently represent a hydrogen atom or a substituent, which has the same meaning as R 1 and R 2 in the above general formula (2), and the preferred ranges are also the same.

[0205] In general formula (3), B 1 ~B 4 each independently represent a carbon atom or a nitrogen atom, which has the same meaning as B 1 ~B 4 in the above general formula (2), and the preferred ranges are also the same.

[0206] In general formula (3), R 3 and R 4 each independently represent a hydrogen atom or a substituent. As the substituents that can be used as R 3 and R 4 there is no particular limitation, and groups the same as the substituents that can be used as R 1 and R 2 above can be cited.

[0207] Among them, the substituents that can be used as R 3 are preferably an alkyl group, an alkoxy group, an amino group, an amide group, a sulfonamide group, a cyano group, a nitro group, an aryl group, a heteroaryl group, a heteroatom-containing ring group, an alkoxycarbonyl group, a carbamoyl group or a halogen atom, more preferably an alkyl group, an aryl group or an amino group, and further preferably an alkyl group.

[0208] As those that can be used as R 4The substituents are preferably alkyl, aryl, heteroaryl, heteroatom-containing cyclic group, alkoxy, alkoxycarbonyl, acyl, acyloxy, amide, carbamoyl, amino or cyano, more preferably alkyl, alkoxycarbonyl, acyl, carbamoyl or aryl, and still more preferably alkyl.

[0209] can be used as R 3 and R 4 The alkyl group can be linear, branched or cyclic, but is preferably linear or branched. The number of carbon atoms of the alkyl group is preferably 1 to 12, more preferably 1 to 8. Examples of the alkyl group preferably include methyl, ethyl, n-propyl, isopropyl, tert-butyl, 2-ethylhexyl, cyclohexyl, and more preferably methyl and tert-butyl.

[0210] [Chemical formula 11]

[0211] General formula (4)

[0212] In general formula (4), R 1 and R 2 each independently represent a hydrogen atom or a substituent, which has the same meaning as R 1 and R 2 in the above general formula (2), and the preferred ranges are also the same.

[0213] In general formula (4), B 1 ~B 4 each independently represent a carbon atom or a nitrogen atom, which has the same meaning as B 1 ~B 4 in the above general formula (2), and the preferred ranges are also the same.

[0214] In general formula (4), R 5 and R 6 each independently represent a hydrogen atom or a substituent. As the substituents that can be used as R 5 and R 6 , there is no particular limitation, and groups the same as those that can be used as the substituents of the above R 1 and R 2 can be cited.

[0215] Among them, the substituents that can be used as R 5 are preferably alkyl, alkoxy, aryloxy, amino, cyano, aryl, heteroaryl, heteroatom-containing cyclic group, acyl, acyloxy, amide, sulfonamide, ureido or carbamoyl, more preferably alkyl, alkoxy, acyl, amide or amino, and still more preferably alkyl.

[0216] The alkyl group that can be used as R 5 has the same meaning as the alkyl group that can be used as R 3 in general formula (3), and the preferred ranges are also the same.

[0217] In general formula (4), the substituent that can be used as R 6 is preferably an alkyl group, an alkenyl group, an aryl group, a heteroaryl group, a heterocyclic group containing a heteroatom, an alkoxy group, a cycloalkoxy group, an aryloxy group, an alkoxycarbonyl group, an acyl group, an acyloxy group, an amide group, a sulfonamide 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 containing a heteroatom, and even more preferably an alkyl group or an aryl group.

[0218] The alkyl group that can be used as R 6 has the same meaning as the alkyl group that can be used as R 4 in general formula (3), and the preferred ranges are also the same.

[0219] The aryl group that can be used as R 6 is preferably an aryl group having 6 to 12 carbon atoms, and more preferably a phenyl group. This aryl group may have substituents, and as such substituents, the groups included in the following substituent group A can be cited, and particularly preferably an alkyl group having 1 to 10 carbon atoms, a sulfonyl group, an amino group, an acylamino group, and a sulfonylamino group. These substituents may further have substituents. Specifically, the substituent is preferably an alkylsulfonylamino group.

[0220] - Substituent group A -

[0221] Halogen atom, alkyl group, alkenyl group, alkynyl group, aryl group, heterocyclic group, cyano group, hydroxyl group, nitro group, carboxyl group, alkoxy group, aminooxy group, aryloxy group, silyloxy group, heterocyclic oxy group, acyloxy group, carbamoyloxy group, amino group, acylamino group, aminocarbonylamino group, alkoxycarbonylamino group, aryloxycarbonylamino group, sulfamoylamino group, sulfonylamino group (including alkyl or arylsulfonylamino group), mercapto group, alkylthio group, arylthio group, heterocyclic thio group, sulfamoyl group, sulfo group, alkyl or arylsulfinyl group, sulfonyl group (including alkyl or arylsulfonyl group), acyl group, aryloxycarbonyl group, alkoxycarbonyl group, carbamoyl group, aryl or heterocyclic azo group, imide group, phosphino group, phosphinyl group, phosphinyloxy group, phosphinylamino group, silyl group, etc.

[0222] [Chemical formula 12]

[0223]

[0224] In general formula (5), R 1 and R 2 each independently represent a hydrogen atom or a substituent, and have the same meaning as R 1 and R 2 in the above general formula (2), and the preferred ranges are also the same.

[0225] In general formula (5), B 1 to B 4 each independently represent a carbon atom or a nitrogen atom, and are the same as B in the above general formula (2)1 ~B 4 have the same meaning and the same preferred range.

[0226] In general formula (5), R 7 and R 8 each independently represent a hydrogen atom or a substituent. As the substituents that can be used as R 7 and R 8 there is no particular limitation, and groups the same as the substituents that can be used as the above-mentioned R 1 and R 2 can be cited.

[0227] Among them, the preferred range, more preferred range and further preferred range of the substituents that can be used as R 7 are the same as those of the substituents that can be used as R in general formula (4). 5 The alkyl group that can be used as R 5 has the same meaning as the alkyl group that can be used as the above-mentioned R 3 and the same preferred range.

[0228] In general formula (5), the preferred range, more preferred range and further preferred range of the substituents that can be used as R 8 are the same as those of the substituents that can be used as R in general formula (4). 6 The preferred ranges of the alkyl group and aryl group that can be used as R 8 are the same as the meanings of the alkyl group and aryl group that can be used as the above-mentioned R in general formula (4). 6 and the same preferred range.

[0229] In the present invention, when using a squarylium-based pigment as Dye A, as the squarylium-based pigment, any squarylium pigment represented by any one of general formulas (1) to (5) can be used without particular limitation. As an example thereof, for example, compounds described in JP-A-2006-160618, WO 2004 / 005981, WO 2004 / 007447, Dyes and Pigment, 2001, 49, p.161-179, WO 2008 / 090757, WO 2005 / 121098, JP-A-2008-275726 can be cited.

[0230] Hereinafter, specific examples of the pigments represented by any one of general formulas (1) to (5) are shown. However, the present invention is not limited to these.

[0231] In the following specific examples, Me represents a methyl group, Et represents an ethyl group, Bu represents a butyl group, and Ph represents a phenyl group.

[0232] [Chemical formula 13]

[0233]

[0234] [Chemical Formula 14]

[0235]

[0236] [Chemical Formula 15]

[0237]

[0238] In addition to the above specific examples, specific examples of the pigments represented by any one of the general formulas (3) to (5) are given below. The substituent B in the following table represents the following structure. In the following structure and the following table, Me represents methyl, Et represents ethyl, i-Pr represents isopropyl, Bu represents n-butyl, t-Bu represents tert-butyl, and Ph represents phenyl. In the following structure, * represents the bonding part to the carbon four-membered ring in each general formula.

[0239] [Chemical Formula 16]

[0240]

[0241] [Chemical Formula 17]

[0242]

[0243] [Chemical Formula 18]

[0244] General formula (3)

[0245]

[0246] [Chemical Formula 19]

[0247]

[0248] [Chemical Formula 20]

[0249]

[0250] [Chemical Formula 21]

[0251] General formula (4)

[0252]

[0253] [Chemical Formula 22]

[0254]

[0255] [Chemical Formula 23]

[0256]

[0257]

[0258] [Chemical Formula 24]

[0259]

[0260] (Quencher-incorporated pigment)

[0261] The squarylium pigment represented by the above general formula (1) can be a quencher-incorporated pigment in which the quencher moiety is linked to the pigment via a linking group by a covalent bond. The above quencher-incorporated pigment can also preferably be used as at least one of the pigments in Dye C. That is, the above quencher-incorporated pigment is classified as Dye C according to the wavelength of the main absorption wavelength band.

[0262] As the above quencher moiety, for example, a ferrocenyl group in the above substituent X can be mentioned. Also, the quencher moiety in the quencher compounds described in paragraphs

[0199] to

[0212] and

[0234] to

[0310] of International Publication No. 2019 / 066043 can be mentioned.

[0263] Specific examples of the pigment corresponding to the quencher-incorporated pigment among the squarylium pigments represented by the general formula (1) are shown below. However, the present invention is not limited to these.

[0264] In the following specific examples, Me represents a methyl group, Et represents an ethyl group, and Bu represents a butyl group.

[0265] [Chemical Formula 25]

[0266]

[0267] [Chemical Formula 26]

[0268]

[0269] [Chemical Formula 27]

[0270]

[0271] [Chemical Formula 28]

[0272]

[0273] [Chemical Formula 29]

[0274]

[0275] [Chemical Formula 30]

[0276]

[0277] [Chemical Formula 31]

[0278]

[0279] [Chemical Formula 32]

[0280]

[0281] [Chemical Formula 33]

[0282]

[0283] [Chemical Formula 34]

[0284]

[0285] [Chemical Formula 35]

[0286]

[0287] [Chemical Formula 36]

[0288]

[0289] [Chemical Formula 37]

[0290]

[0291] [Chemical Formula 38]

[0292]

[0293] [Chemical Formula 39]

[0294]

[0295] As for Dye C, from the viewpoint of brightness, it is preferable that the absorption waveform in the main absorption wavelength band is sharp.

[0296] The main absorption wavelength band that Dye C has in the wavelength selective absorption filter is preferably 580 to 600 nm.

[0297] Regarding the content of Dye A in the wavelength selective absorption filter of the present invention, there is no particular limitation as long as the wavelength selective absorption filter of the present invention exhibits the desired chromaticity adjustment function, and it can be appropriately adjusted according to the absorption waveform or molar extinction coefficient in the blue light wavelength region that Dye A has. For example, the lower limit value is preferably 0.01% by mass or more, more preferably 0.1% by mass or more. Regarding the upper limit value, there is no particular limitation as long as the wavelength selective absorption filter of the present invention exhibits the desired relative brightness and correlated color temperature, but for example, it is preferably 45% by mass or less, more preferably 30% by mass or less.

[0298] The content of Dye C in the wavelength-selective absorption filter of the present invention can be appropriately adjusted according to the content of Dye A in the wavelength-selective absorption filter of the present invention so that the wavelength-selective absorption filter of the present invention exhibits a desired correlated color temperature. For example, the lower limit value is preferably 0.05% by mass or more, more preferably 0.2% by mass or more, and the upper limit value is preferably 50% by mass or less, more preferably 40% by mass or less.

[0299] The content ratios of Dye A and Dye C in the wavelength-selective absorption filter of the present invention are appropriately adjusted according to the types of the respective dyes. For example, in terms of mass ratio, Dye C:Dye A = 1:0.1 to 10 is preferred, and 1:0.2 to 8 is more preferred.

[0300] In addition, when Dye C is the quencher-incorporated pigment as described above, from the viewpoint of the antireflection effect, the content of the quencher-incorporated pigment is preferably 0.1% by mass or more in the wavelength-selective absorption filter of the present invention. The upper limit value is preferably 45% by mass or less.

[0301] <Resin>

[0302] The resin (hereinafter also referred to as "matrix resin") contained in the wavelength-selective absorption filter of the present invention is not particularly limited as long as it can disperse (preferably dissolve) the above dyes and has a desired light transmittance (in the visible region with a wavelength of 400 to 800 nm, the light transmittance is preferably 80% or more).

[0303] When Dye C is a squarylium pigment represented by the general formula (1), the above matrix resin is preferably a low-polarity matrix resin that can make the squarylium pigment exhibit a sharper absorption. By making the squarylium pigment exhibit a sharper absorption, the wavelength-selective absorption filter of the present invention can further suppress the decrease in relative luminance. Here, low polarity means that the fd value defined by the following relational expression I is preferably 0.50 or more.

[0304] Relational expression I: fd = δd / (δd + δp + δh)

[0305] In relational expression I, δd, δp, and δh respectively represent the term corresponding to the London dispersion force, the term corresponding to the dipole-dipole force, and the term corresponding to the hydrogen bond force with respect to the solubility parameter δt calculated by the Hoy method. The specific calculation method will be described later. That is, fd represents the ratio of δd to the sum of δd, δp, and δh.

[0306] By setting the fd value to 0.50 or more, it is easy to obtain a sharper absorption waveform.

[0307] Moreover, when the wavelength-selective absorption filter of the present invention contains two or more matrix resins, the fd value is calculated in the following manner.

[0308] fd = ∑(w i ·fd i )

[0309] Here, w i represents the mass fraction of the i th matrix resin, and fd i represents the fd value of the i th matrix resin.

[0310] - The term δd corresponding to the London dispersion force -

[0311] The term δd corresponding to the London dispersion force refers to the δd obtained for the Amorphous Polymers described in the column of "2) Method of Hoy (1985, 1989)" on pages 214 - 220 of the literature "Properties of Polymers 3 rd , ELSEVIER, (1990)", and is calculated according to the description in the above column of the above literature.

[0312] - The term δp corresponding to the dipole - dipole force -

[0313] The term δp corresponding to the dipole - dipole force refers to the δp obtained for the Amorphous Polymers described in the column of "2) Method of Hoy (1985, 1989)" on pages 214 - 220 of the literature "Properties of Polymers 3 rd , ELSEVIER, (1990)", and is calculated according to the description in the above column of the above literature.

[0314] - The term δh corresponding to the hydrogen - bond force -

[0315] The term δh corresponding to the hydrogen - bond force refers to the δh obtained for the Amorphous Polymers described in the column of "2) Method of Hoy (1985, 1989)" on pages 214 - 220 of the literature "Properties of Polymers 3 rd , ELS EVIER, (1990)", and is calculated according to the description in the above column of the above literature.

[0316] Moreover, if the above matrix resin is a resin showing constant hydrophobicity, the moisture content of the wavelength - selective absorption filter of the present invention can be set to a low moisture content of, for example, 0.5% or less, which is preferable from the viewpoint of improving the light resistance of the wavelength - selective absorption filter of the present invention.

[0317] In addition to the polymer, the resin may also contain any conventional components. However, the fd of the above-mentioned matrix resin is the calculated value for the polymer constituting the matrix resin.

[0318] As a preferred example of the above-mentioned matrix resin, for example, polystyrene resin and cyclic olefin resin can be cited, and polystyrene resin is more preferred. Generally, the above-mentioned fd value of polystyrene resin is 0.45 to 0.60, and the above-mentioned fd value of cyclic polystyrene resin is 0.45 to 0.70. As described above, it is preferable to use a value of 0.50 or more for the fd value.

[0319] In addition, for example, in addition to these preferred resins, it is also preferable to use resin components such as the stretchable resin component and the peelability control resin component described later, which impart functionality to the wavelength selective absorption filter. That is, in the present invention, the matrix resin is used in the sense of containing the stretchable resin component and the peelability control resin component in addition to the above-mentioned resins.

[0320] From the viewpoint of sharpening the absorption waveform of the pigment, it is preferable that the above-mentioned matrix resin contains polystyrene resin.

[0321] (Polystyrene resin)

[0322] The polystyrene contained in the above-mentioned 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 kind of polystyrene or two or more kinds. Here, the styrene component refers to a structural unit derived from a monomer having a styrene skeleton in its structure.

[0323] From the viewpoint of controlling the photoelastic coefficient and hygroscopicity to values preferably in the range for the wavelength selective absorption filter, the polystyrene more preferably contains 70% by mass or more of the styrene component, and further preferably contains 85% by mass or more. Also, the polystyrene is preferably composed only of the styrene component.

[0324] As the polystyrene composed only of the styrene component in polystyrene, homopolymers of styrene compounds and copolymers of two or more styrene compounds can be cited. Here, the styrene compound refers to a compound having a styrene skeleton in its structure, and in addition to styrene, it also contains a compound in which a substituent is introduced within the range where the ethylenic unsaturated bond of styrene can function as a reactive (polymerizable) group.

[0325] As specific styrene compounds, for example, styrene can be cited; alkyl styrenes such as α-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, 3,5-dimethylstyrene, 2,4-dimethylstyrene, o-ethylstyrene, p-ethylstyrene, and tert-butylstyrene; substituted styrenes in which a hydroxyl group, an alkoxy group, a carboxyl group, a halogen atom, etc. are introduced into the benzene nucleus of styrene, such as hydroxystyrene, tert-butoxystyrene, vinylbenzoic acid, o-chlorostyrene, and p-chlorostyrene. Among them, from the viewpoints of easy availability, material price, etc., the above-mentioned polystyrene preferably is a homopolymer of styrene (i.e., polystyrene).

[0326] Moreover, there is no particular limitation on the structural components other than the styrene component that can be contained in the above-mentioned polystyrene. That is, the polystyrene can be a styrene-diene copolymer or a styrene-polymerizable unsaturated carboxylate copolymer, etc. Also, a mixture of polystyrene and a synthetic rubber (for example, polybutadiene and polyisoprene) can be used. Also, impact-resistant polystyrene (HIPS) obtained by graft-polymerizing styrene and a synthetic rubber is preferably used. Also, polystyrene (referred to as graft-type impact-resistant polystyrene "graft HIPS") obtained by dispersing a rubber-like elastomer in a continuous phase of a polymer containing a styrene component (for example, a copolymer of a styrene component and a (meth)acrylate component) and graft-polymerizing the above copolymer and the above rubber-like elastomer is preferably used. Moreover, a so-called styrene-based elastomer can be preferably used.

[0327] Moreover, the above-mentioned polystyrene can be hydrogenated (it can be hydrogenated polystyrene). There is no particular limitation on the above-mentioned hydrogenated polystyrene, but hydrogenated styrene-diene copolymers such as hydrogenated styrene-butadiene-styrene block copolymer (SEBS) obtained by adding hydrogen to styrene-butadiene-styrene block copolymer (SBS) and hydrogenated styrene-isoprene-styrene block copolymer (SEPS) obtained by adding hydrogen to styrene-isoprene-styrene block copolymer (SIS) are preferred. The above-mentioned hydrogenated polystyrene can be used alone or in combination of two or more kinds.

[0328] Moreover, the above-mentioned polystyrene can be modified polystyrene. There is no particular limitation on the above-mentioned modified polystyrene, but polystyrene into which a reactive group such as a polar group is introduced can be cited. Specifically, acid-modified polystyrene such as maleic acid modification and epoxy-modified polystyrene can be preferably cited.

[0329] As polystyrene, a plurality of polystyrenes having different compositions, molecular weights, etc. can be used in combination.

[0330] Polystyrene-based resins can be obtained by conventional methods such as anionic, bulk, suspension, emulsion, or solution polymerization methods. Moreover, in polystyrene, at least a part of the unsaturated double bonds of the benzene rings of conjugated diene and styrene monomers can be hydrogenated. The hydrogenation rate can be measured by a nuclear magnetic resonance apparatus (NMR).

[0331] As the polystyrene resin, commercially available products can be used. For example, “CLEAREN530L” and “CLEAREN730L” manufactured by Denka Company Limited, “TUFPRENE126S” and “ASAPRENET411” manufactured by Asahi Kasei Corporation., “ClaytonD1102A” and “ClaytonD1116A” manufactured by Kraton Corporation, “Styrolu x S” and “Styrolux T” manufactured by Styrolution, “ASAF LEX840” and “ASAFLEX860” (the above are SBS) manufactured by Asahi Kasei ChemicalsCorporation, “679”, “HF77”, and “SGP-10” manufactured by PS Japan Corporation, “DICSTYRENEXC-515” and “DICSTYRENEXC-535” (the above are GPPS) manufactured by DIC Corporation, “475D”, “H0103”, and “HT478” manufactured by PS Japan Corporation, “DICSTYRENEGH-8300-5” (the above are HIPS) manufactured by DIC Corporation, etc. As the hydrogenated polystyrene resin, for example, “TUFTEC H series” manufactured by Asahi Kasei ChemicalsCorporation, “Clayton G series” (the above are SEBS) manufactured by Shell Japan Ltd., “DYNARON” (hydrogenated styrene-butadiene random copolymer) manufactured by JSRCorporation, “SEPTON” (SEPS) manufactured by KURARAY CO., LTD., etc. Moreover, as the modified polystyrene resin, for example, “TUFTEC M series” manufactured by Asahi Kasei Chemi calsCorporation, “EPOFRIEND” manufactured by Daicel Corporation, “polar group modified DYNARON” manufactured by JSR Corporation, “RESEDA” manufactured by TOAGOSEI CO., LTD., etc.

[0332] In addition to the above-mentioned polystyrene resin, the wavelength selective absorption filter of the present invention preferably further contains a polyphenylene ether resin. By containing both the polystyrene resin and the polyphenylene ether resin, the toughness of the wavelength selective absorption filter is improved, and the generation of defects such as cracks can be suppressed even in severe environments such as high temperature and high humidity.

[0333] However, in the case where the wavelength selective absorption filter of the present invention contains a polyphenylene ether resin in addition to the above-mentioned polystyrene resin, the fd value of the polyphenylene ether resin is not considered in the calculation of the above fd value.

[0334] As the above-mentioned polyphenylene ether resin, ZYLONS201A, ZYLON 202A, ZYLON S203A, etc. manufactured by Asahi Kasei Corporation can be preferably used. Further, a resin obtained by premixing a polystyrene resin and a polyphenylene ether resin can be used. As the mixed resin of the polystyrene resin and the polyphenylene ether resin, for example, ZYLON 1002H, ZYLON 1000H, ZYLON 600H, ZYLON 500H, ZYLON400H, ZYLON 300H, ZYLON 200H, etc. manufactured by AsahiKasei Corporation can be preferably used.

[0335] In the wavelength selective absorption filter of the present invention, when a polystyrene resin and a polyphenylene ether resin are contained, the mass ratio of the two is preferably 99 / 1 to 50 / 50, more preferably 98 / 2 to 60 / 40, and further preferably 95 / 5 to 70 / 30 in terms of polystyrene resin / polyphenylene ether resin. 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 can cause the solvent to volatilize moderately in the case of solution film formation.

[0336] (Cyclic olefin resin)

[0337] As the cyclic olefin compound that forms the cyclic olefin contained in the cyclic olefin resin, there is no particular limitation as long as it is a compound having a ring structure containing a carbon-carbon double bond. For example, norbornene compounds, monocyclic cyclic olefin compounds other than norbornene compounds, cyclic conjugated diene compounds, and vinyl alicyclic hydrocarbons can be cited.

[0338] As the cyclic polyolefin, for example, there can be mentioned (1) a polymer containing a structural unit derived from a norbornene compound, (2) a polymer containing a structural unit derived from a monocyclic cyclic olefin compound other than the norbornene compound, (3) a polymer containing a structural unit derived from a cyclic conjugated diene compound, (4) a polymer containing a structural unit derived from a vinyl alicyclic hydrocarbon compound, and a hydride of a polymer containing a structural unit derived from each of the compounds (1) to (4), etc.

[0339] In the present invention, in the polymer containing a structural unit derived from a norbornene compound and the polymer containing a structural unit derived from a monocyclic cyclic olefin compound, there are included ring-opening polymers of each compound.

[0340] As the cyclic polyolefin, there is no particular limitation, but a polymer having a structural unit derived from a norbornene compound represented by the following general formula (A-II) or (A-III) is preferred. The polymer having a structural unit represented by the following general formula (A-II) is an addition polymer of a norbornene compound, and the polymer having a structural unit represented by the following general formula (A-III) is a ring-opening polymer of a norbornene compound.

[0341] [Chemical formula 40]

[0342]

[0343] In the general formulas (A-II) and (A-III), m is an integer of 0 to 4, preferably 0 or 1.

[0344] In the general formulas (A-II) and (A-III), R 3 ~R 6 each independently represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.

[0345] In the hydrocarbon groups in the general formulas (A-I) to (A-III), as long as they are groups containing carbon atoms and hydrogen atoms, there is no particular limitation, and examples thereof include an alkyl group, an alkenyl group, an alkynyl group, and an aryl group (aromatic hydrocarbon group), etc. Among them, an alkyl group or an aryl group is preferred.

[0346] In the 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 by a halogen atom, -(CH2) n COOR 11 , -(CH2) n OCOR 12 , -(CH2) n NCO, -(CH2)n NO2, -(CH2) n CN, -(CH2) n CONR 13 R 14 , -(CH2) n NR 13 R 14 , -(CH2) n OZ or -(CH2) n W or X 2 and Y 2 or X 3 and Y 3 bonded to each other to form, (-CO)2O or (-CO)2NR 15 .

[0347] Here, 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 is a hydrocarbon group having 1 to 10 carbon atoms). p is an integer of 0 to 3). n is an integer of 0 to 10, preferably 0 to 8, more preferably 0 to 6.

[0348] In the general formulas (A-II) and (A-III), R 3 ~R 6 are each preferably a hydrogen atom or -CH3, and from the viewpoint of moisture permeability, more preferably a hydrogen atom.

[0349] X 2 and X 3 are each preferably a hydrogen atom, -CH3 or -C2H5, and from the viewpoint of moisture permeability, more preferably a hydrogen atom.

[0350] Y 2 and Y 3 are each preferably a hydrogen atom, a halogen atom (especially, a chlorine atom) or -(CH2) n COOR 11 (especially, -COOCH3), and from the viewpoint of moisture permeability, more preferably a hydrogen atom.

[0351] Other groups can be appropriately selected.

[0352] The polymer having a structural unit represented by the general formula (A-II) or (A-III) may further contain at least one structural unit represented by the following general formula (A-I).

[0353] [Chemical formula 41]

[0354]

[0355] In the general formula (A-I), 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 by a halogen atom, -(CH2) n COOR 11 、-(CH2) n OCOR 12 、-(CH2) n NCO、-(CH2) n NO2、-(CH2) n CN、-(CH2) n CONR 13 R 14 、-(CH2) n NR 13 R 14 、-(CH2) n OZ、-(CH2) n W、or X 1 and Y 1 bond to each other to form (-CO)2O or (-CO)2NR 15 .

[0356] Herein, R 11 to 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 by 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 is a hydrocarbon group having 1 to 10 carbon atoms). p is an integer from 0 to 3. n is an integer from 0 to 10.

[0357] From the viewpoint of sealing performance, the cyclic polyolefin having a structural unit represented by the general formula (A-II) or (A-III) preferably contains 90% by mass or less of the structural unit derived from the above norbornene compound relative to the total mass of the cyclic polyolefin, more preferably contains 30 to 85% by mass, still more preferably contains 50 to 79% by mass, and most preferably contains 60 to 75% by mass. Here, the proportion of the structural unit derived from the norbornene compound represents the average value in the cyclic polyolefin.

[0358] The addition (co) polymers of norbornene compounds are described in Japanese Patent Laid-Open No. 10-7732, Japanese Patent Application Laid-Open No. 2002-504184, US Patent Publication No. 2004 / 229157A1, International Publication No. 2004 / 070463, etc.

[0359] As the polymer of the norbornene compound, it is obtained by addition polymerization of norbornene compounds (for example, polycyclic unsaturated compounds of norbornene) with each other.

[0360] And, as the polymer of the norbornene compound, as needed, copolymers obtained by addition polymerization of norbornene compounds and olefins such as ethylene, propylene, and butylene, conjugated dienes such as butadiene and isoprene, non-conjugated dienes such as ethylidene norbornene, and vinyl unsaturated compounds such as acrylonitrile, acrylic acid, methacrylic acid, maleic anhydride, acrylate, methacrylate, maleimide, vinyl acetate, and vinyl chloride can be mentioned. Among them, a copolymer of a norbornene compound and propylene is preferred.

[0361] Examples of such addition (co) polymers of norbornene compounds include APL8008T (Tg 70°C), APL6011T (Tg 105°C), APL6013T (Tg 125°C), APL6015T (Tg 145°C), etc., which are sold by Mitsui Chemicals, INC. under the trade name of Apel and have different glass transition temperatures (Tg). And, TOPAS8007, TOPAS6013, TOPAS6015, etc. are sold as granules by Polyplastics Co., Ltd. Moreover, Appear3000 is sold by Ferrania.

[0362] Commercially available products can be used for the polymers of the above norbornene compounds. For example, they are commercially available under the trade name of Arton G or Arton F by JSR Corporation, and under the trade name of Zeonor ZF14, ZF16, Zeonex 250, or Zeonex 280 by Zeon Corporation.

[0363] The hydride of the polymer of the norbornene compound can be synthesized by subjecting a norbornene compound or the like to addition polymerization or ring-opening metathesis polymerization and then hydrogenating the product. The synthesis method is described, for example, in Japanese Patent Laid-Open No. 1-240517, Japanese Patent Laid-Open No. 7-196736, Japanese Patent Laid-Open No. 60-26024, Japanese Patent Laid-Open No. 62-19801, Japanese Patent Laid-Open No. 2003-159767, Japanese Patent Laid-Open No. 2004-309979, and the like.

[0364] The molecular weight of the above cyclic polyolefin can be appropriately selected according to the intended use, but it is the weight-average molecular weight in terms of polyisoprene or polystyrene of a cyclohexane solution (toluene solution when the polymer is not dissolved) measured by gel permeation chromatography. Generally, it is in the range of 5,000 to 500,000, preferably 8,000 to 200,000, and more preferably 10,000 to 100,000. The polymer having a molecular weight in the above range can achieve a high level and balance between the mechanical strength and the moldability of the molded article.

[0365] The wavelength-selective absorption filter of the present invention preferably contains 5% by mass or more of the above matrix resin, more preferably 20% by mass or more, further preferably 50% by mass or more, and particularly preferably 70% by mass or more.

[0366] The content of the above matrix resin in the wavelength-selective absorption filter of the present invention is usually 99.90% by mass or less, preferably 99.85% by mass or less.

[0367] The cyclic polystyrene contained in the wavelength-selective absorption filter of the present invention can be two or more kinds, and polymers having different at least one of the composition ratio and the molecular weight can be used in combination. In this case, the total content of each polymer is within the above range.

[0368] (Elongation resin component)

[0369] The wavelength-selective absorption filter of the present invention can appropriately select a component showing elongation (also referred to as an elongation resin component) as the resin component. Specifically, acrylonitrile-butadiene-styrene resin (ABS resin), styrene-butadiene resin (SB resin), isoprene resin, butadiene resin, polyether-polyurethane resin, silicone resin, etc. can be mentioned. And these resins can be further hydrogenated appropriately.

[0370] As the above elongation resin component, ABS resin or SB resin is preferably used, and SB resin is more preferably used.

[0371] The above-mentioned SB resin can use commercially available resins, for example. As such commercial products, TR2000, TR2003, TR2250 (the above are product names, manufactured by JSR Corporation), CLEAREN210M, 220M, 730V (the above are product names, manufactured by Denka Company Limited.), ASAFLEX 800S, 805, 810, 825, 830, 840 (the above are product names, manufactured by Asahi Kasei Corporation), Eporex SB2400, SB2610, SB2710 (the above are product names, Sumitomo Chemical Co., Ltd.), etc. can be cited.

[0372] The wavelength-selective absorption filter of the present invention preferably contains 15 to 95% by mass of an extensible resin component in the base resin, more preferably contains 20 to 50% by mass, and further preferably contains 25 to 45% by mass.

[0373] As the above-mentioned extensible resin component, when an extensible resin component is used alone to produce a specimen in the form of a thickness of 30 μm and a width of 10 mm, and the elongation at break is measured at 25°C according to JIS 7127, the elongation at break preferably shows 10% or more, and more preferably shows 20% or more.

[0374] (Release property control resin component)

[0375] Regarding the wavelength-selective absorption filter of the present invention, in the case of being produced by a method including a step of peeling the wavelength-selective absorption filter of the present invention from a release film in the manufacturing method of the wavelength-selective absorption filter of the present invention described later, a component for controlling the release property (release property control resin component) can be included as a resin component, and thus it is preferred. By controlling the release property of the wavelength-selective absorption filter of the present invention from the release film, it is possible to prevent traces of peeling from remaining on the wavelength-selective absorption filter of the present invention after peeling, and to cope with various processing speeds in the peeling process. As a result, a preferred effect can be obtained in terms of improving the quality and productivity of the wavelength-selective absorption filter of the present invention.

[0376] There is no particular limitation on the above-mentioned release property control resin component, and it can be appropriately selected according to the type of the release film. As described later, when a polyester-based polymer film is used as the release film, as the release property control resin component, for example, a polyester resin (also called a polyester-based additive) is preferably used.

[0377] The above-mentioned polyester-based additive can be obtained by conventional methods such as dehydration condensation reaction of polybasic acid and polyhydric alcohol and addition of dibasic anhydride to polyhydric alcohol and dehydration condensation reaction, and a polyester formed from dibasic acid and diol is preferred.

[0378] The weight-average molecular weight (Mw) of the above polyester-based additive is preferably 500 to 50,000, more preferably 750 to 40,000, and still more preferably 2,000 to 30,000.

[0379] If the weight-average molecular weight of the above polyester-based additive is equal to or higher than the above-mentioned preferred lower limit value, it is preferred from the viewpoints of brittleness and heat and humidity resistance. If it is equal to or lower than the above-mentioned preferred upper limit value, it is preferred from the viewpoint of compatibility with the resin.

[0380] The weight-average molecular weight of the above polyester-based additive is the value of the weight-average molecular weight (Mw) in terms of standard polystyrene measured under the following conditions. Regarding the molecular weight distribution (Mw / Mn), it can also be measured under the same conditions. In addition, Mn is the number-average molecular weight in terms of standard polystyrene.

[0381] GPC: Gel permeation chromatography apparatus (HLC-8220GPC manufactured by Tosoh Corporation,

[0382] Column; guard column HXL-H, TSK gel G7000 HXL, two TSKgel GMHXL, TSK gel G2000HXL, connected in sequence, manufactured by Tosoh Corporation,

[0383] Eluent; tetrahydrofuran,

[0384] Flow rate; 1 mL / min,

[0385] Sample concentration; 0.7 to 0.8 mass%,

[0386] Sample injection volume; 70 μL,

[0387] Measurement temperature; 40 °C,

[0388] Detector; differential refractive index (RI) meter (40 °C),

[0389] Standard substance; TSK standard polystyrene manufactured by Tosoh Corporation

[0390] As the dicarboxylic acid component constituting the polyester-based additive, dicarboxylic acids can be preferably selected.

[0391] Examples of the dicarboxylic acid include aliphatic dicarboxylic acids and aromatic dicarboxylic acids, etc. Aromatic dicarboxylic acids, or a mixture of aromatic dicarboxylic acids and aliphatic dicarboxylic acids can be preferably used.

[0392] Among the aromatic dicarboxylic acids, aromatic dicarboxylic acids having 8 to 20 carbon atoms are preferred, and aromatic dicarboxylic acids having 8 to 14 carbon atoms are more preferred. Specifically, at least one of phthalic acid, isophthalic acid, and terephthalic acid can be preferably selected.

[0393] Among the aliphatic dicarboxylic acids, aliphatic dicarboxylic acids having 3 to 8 carbon atoms are preferred, and aliphatic dicarboxylic acids having 4 to 6 carbon atoms are more preferred. Specifically, at least one of succinic acid, maleic acid, adipic acid, and glutaric acid can be preferably selected, and at least one of succinic acid and adipic acid is more preferred.

[0394] Moreover, as the glycol component constituting the polyester-based additive, aliphatic glycols, aromatic glycols, etc. can be mentioned, and aliphatic glycols are preferred.

[0395] Among the aliphatic glycols, aliphatic glycols having 2 to 4 carbon atoms are preferred, and aliphatic glycols having 2 to 3 carbon atoms are more preferred.

[0396] As the aliphatic glycol, for example, ethylene glycol, diethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, etc. can be mentioned, and they can be used alone or in combination of two or more.

[0397] The polyester-based additive is particularly preferably a compound obtained by condensing at least one of phthalic acid, isophthalic acid, and terephthalic acid with an aliphatic glycol.

[0398] The terminal of the polyester-based additive can react with a monocarboxylic acid to be sealed. As the monocarboxylic acid for sealing, aliphatic monocarboxylic acids are preferred, and acetic acid, propionic acid, butyric acid, benzoic acid, and their derivatives can be preferably selected, acetic acid or propionic acid is more preferred, and acetic acid is further preferred.

[0399] As commercially available polyester-based additives, ester-based resins Polyester (for example, LP050, TP290, LP035, LP033, TP217, TP220) manufactured by The Nippon Synthetic Chemical Industry Co., Ltd., ester-based resins BYRON (for example, BYRON 245, BYRONGK890, BYRON103, BYRON200, BYRON550, BYRON GK880) manufactured by TOYOBO CO., LTD., etc. can be mentioned.

[0400] In the wavelength - selective absorption filter of the present invention, the content of the peelability - controlling resin component is preferably 0.05% by mass or more, more preferably 0.1% by mass or more in the base resin. Moreover, the upper limit value is preferably 25% by mass or less, more preferably 20% by mass or less, and further preferably 15% by mass or less. From the viewpoint of obtaining appropriate adhesiveness, it is preferably within the above - mentioned preferred range.

[0401] <Anti - fading agent>

[0402] The wavelength - selective absorption filter of the present invention preferably contains an anti - fading agent for dyes (also simply referred to as an anti - fading agent) to prevent the fading of the dyes containing the above - mentioned Dye A and Dye C.

[0403] As the above - mentioned anti - fading agent, antioxidants described in paragraphs

[0143] to

[0165] of International Publication No. 2015 / 005398, radical scavengers described in paragraphs

[0166] to

[0199] of International Publication No. 2015 / 005398, and deterioration inhibitors described in paragraphs

[0205] to

[0206] of International Publication No. 2015 / 005398 and other commonly used anti - fading agents can be used without particular limitation.

[0404] As the above - mentioned anti - fading agent, a compound represented by the following general formula (IV) can be preferably used.

[0405] [Chemical formula 42]

[0406]

[0407] In general formula (IV), R 10 represents an alkyl group, an alkenyl group, an aryl group, a heteroatom - containing cyclic group, or a group represented by R 18 CO -, R 19 SO2 -, or R 20 NHCO -. Here, R 18 , R 19 and R 20 each independently represent an alkyl group, an alkenyl group, an aryl group, or a heteroatom - containing cyclic group. R 11 and R 12 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group, or an alkenyloxy group, and R 13 , R 14 , R 15 , R 16 and R 17 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group.

[0408] Among them, the alkyl group in R 10 to R 20 includes an aralkyl group.

[0409] As the alkyl group represented by R in the general formula (IV) 10 Examples thereof include methyl, ethyl, propyl, benzyl, etc.; as the alkenyl group, examples thereof include allyl, etc.; as the aryl group, examples thereof include phenyl, etc.; as the heteroatom-containing ring group, examples thereof include tetrahydropyranyl, pyrimidinyl, etc. And, R 18 , R 19 and R 20 each independently represent an alkyl group (for example, methyl, ethyl, n-propyl, n-butyl, benzyl, etc.), an alkenyl group (for example, allyl, etc.), an aryl group (for example, phenyl, methoxyphenyl, etc.) or a heteroatom-containing ring group (for example, pyridyl, pyrimidinyl, etc.).

[0410] As the halogen atom represented by R 11 or R 12 in the general formula (IV), examples thereof include chlorine, bromine, etc.; as the alkyl group, examples thereof include methyl, ethyl, n-butyl, benzyl, etc.; as the alkenyl group, examples thereof include allyl, etc.; as the alkoxy group, examples thereof include methoxy, ethoxy, benzyloxy, etc.; as the alkenyloxy group, examples thereof include 2-propenyloxy, etc.

[0411] As the alkyl group represented by R 13 , R 14 , R 15 , R 16 or R 17 in the general formula (IV), examples thereof include methyl, ethyl, n-butyl, benzyl, etc.; as the alkenyl group, examples thereof include 2-propenyl, etc.; as the aryl group, examples thereof include phenyl, methoxyphenyl, chlorophenyl, etc.

[0412] R 10 to R 20 may also have substituents, and as the substituents, examples thereof include the groups represented by R 10 to R 20 .

[0413] Specific examples of the compound represented by the general formula (IV) are shown below. However, the present invention is not limited to these.

[0414] [Chemical formula 43]

[0415] General formula (IV)

[0416] IV-1

[0417] IV-2

[0418] IV-3

[0419] IV-4

[0420] [Chemical Formula 44]

[0421] IV-5

[0422] IV-6

[0423] IV-7

[0424] IV-8

[0425] IV-9

[0426] As the above anti-fading agent, a compound represented by the following general formula [III] can also be preferably used.

[0427] [Chemical Formula 45]

[0428] General formula [III]

[0429] In general formula [III], R 31 represents an aliphatic group or an aromatic group, and Y represents a group of non-metal atoms required to form a 5- to 7-membered ring together with a nitrogen atom.

[0430] In general formula [III], R 31 represents an aliphatic group or an aromatic group, preferably an alkyl group, an aryl group or a heterocyclic group (preferably an aliphatic heterocyclic group), and more preferably an aryl group.

[0431] Examples of the heterocyclic ring formed by Y and a nitrogen atom together include a pyridine ring, a piperazine ring, a morpholine ring, a thiomorpholine ring, a thiomorpholine-1,1-dione ring, a pyrrolidine ring and an imidazolidine ring.

[0432] Furthermore, the above heterocyclic ring may also have substituents, and examples of the substituents include an alkyl group and an alkoxy group.

[0433] Specific examples of the compound represented by general formula [III] are shown below. However, the present invention is not limited to these.

[0434] [Chemical Formula 46]

[0435] III-1

[0436] III-2

[0437] III-3

[0438] III-4

[0439] III-5

[0440] In addition to the above specific examples, as specific examples of the compound represented by the above general formula [III], exemplified compounds B-1 to B-65 described on pages 8 to 11 of the specification of Japanese Patent Laid-Open No. 2-167543 and exemplified compounds (1) to (120) described on pages 4 to 7 of the specification of Japanese Patent Laid-Open No. 63-95439 can also be cited.

[0441] The content of the anti-fading agent in the wavelength-selective absorption filter of the present invention is preferably 1 to 15% by mass, more preferably 5 to 15% by mass, still more preferably 5 to 12.5% by mass, and particularly preferably 10 to 12.5% by mass.

[0442] By containing the anti-fading agent within the above preferred range, the wavelength-selective absorption filter of the present invention does not cause side effects such as discoloration, and can improve the light resistance of the dye (pigment).

[0443] <Other components>

[0444] In addition to the aforementioned dye, matrix resin, and anti-fading agent for the dye, the wavelength-selective absorption filter of the present invention may further contain a matting agent, a leveling agent (surfactant), and the like.

[0445] (Matting agent)

[0446] Within the range not impairing the effects of the present invention, fine particles can be added to the surface of the wavelength-selective absorption filter of the present invention to impart slidability and prevent adhesion. As such fine particles, silica (silicon dioxide, SiO2) having a surface coated with a hydrophobic group and in the form of secondary particles is preferably used. In addition, among the fine particles, fine particles such as titanium dioxide, alumina, zirconia, calcium carbonate, talc, clay, calcined kaolin, calcined calcium silicate, hydrated calcium silicate, aluminum silicate, magnesium silicate, and calcium phosphate can be used together with or instead of silica. Examples of commercially available fine particles include R972 and NX90S (both manufactured by NIPPON AEROSIL CO., LTD., trade names).

[0447] The 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. Even if the wavelength-selective absorption filters of the present invention overlap each other or the wavelength-selective absorption filter of the present invention overlaps with other thin films or the like due to the irregularities, they do not adhere to each other, and slidability can be ensured.

[0448] When the wavelength-selective absorption filter of the present invention contains a matting agent as fine particles, if there are 10 in the minute irregularities caused by the protrusions protruding from the filter surface by the fine particles 4 per mm2 Protrusions with a height of 30 nm or more have a particularly large effect of improving slidability and adhesiveness.

[0449] From the viewpoint of improving adhesiveness and slidability, the matting agent particles are particularly preferably applied to the surface layer. As a method for applying the particles to the surface layer, methods based on multilayer casting and coating can be cited.

[0450] The content of the matting agent in the wavelength selective absorption filter of the present invention can be appropriately adjusted according to the purpose.

[0451] However, in the case where the gas barrier layer described below is provided in the wavelength selective absorption filter of the present invention, it is preferable to apply the above-mentioned matting agent particles to the surface of the wavelength selective absorption filter that contacts the gas barrier layer within a range that does not impair the gas barrier property.

[0452] (Leveling agent)

[0453] A leveling agent (surfactant) can be appropriately mixed in the wavelength selective absorption filter of the present invention. As the leveling agent, commonly used compounds can be used, and fluorosurfactants are particularly preferred. Specifically, for example, the compounds described in paragraphs

[0028] to

[0056] of the specification of Japanese Patent Application Laid-Open No. 2001-330725 can be cited.

[0454] The content of the leveling agent in the wavelength selective absorption filter of the present invention can be appropriately adjusted according to the purpose.

[0455] In addition to the above components, the wavelength selective absorption filter of the present invention may further contain a low molecular weight plasticizer, an oligomer plasticizer, a delay regulator, an ultraviolet absorber, a deterioration inhibitor, a peeling promoter, an infrared absorber, an antioxidant, a filler, a compatibilizer, and the like.

[0456] <Method for manufacturing a wavelength selective absorption filter>

[0457] The wavelength selective absorption filter of the present invention can be produced by a solution casting method, a melt extrusion method, or a method of forming a coating on a substrate film (release film) by any method (coating method) according to a conventional method, and stretching can also be appropriately combined. The wavelength selective absorption filter of the present invention is preferably produced by a coating method.

[0458] (Solution casting method)

[0459] In the solution casting method, a solution is prepared by dissolving the material that constitutes the wavelength selective absorption filter of the present invention in an organic solvent or water. After appropriately performing concentration processes, filtration processes, etc., it is uniformly cast onto a support. Next, the semi-dry film is peeled off from the support, and the two ends of the sheet are appropriately held using clips or the like and the solvent is dried in a drying area. Also, with regard to stretching, it can be additionally performed during and after the drying of the thin film.

[0460] (Melt extrusion method)

[0461] In the melt extrusion method, the material that constitutes the wavelength selective absorption filter of the present invention (hereinafter, also simply referred to as "the material of the wavelength selective absorption filter") is thermally melted. After appropriately performing a filtration process, etc., it is uniformly cast onto a support. Next, the film solidified by cooling is peeled off, and thus stretching can be appropriately performed. When the main material of the wavelength selective absorption filter of the present invention is a thermoplastic polymer resin, the main material of the peeled film is also selected as a thermoplastic polymer resin, and thus the polymer resin in a molten state can be formed into a film by a known co-extrusion method. At this time, by adjusting the types of polymers of the wavelength selective absorption filter and the peeled film and the additives mixed in each layer, or by adjusting the stretching temperature, stretching speed, stretching ratio, etc. of the co-extruded film, the adhesive force between the wavelength selective absorption filter of the present invention and the peeled film can be controlled.

[0462] As co-extrusion methods, for example, co-extrusion T-die method, co-extrusion blow-up method, co-extrusion lamination method, etc. can be cited. Among them, the co-extrusion T-die method is preferred. The co-extrusion T-die method has a feed block method and a multi-manifold method. Among them, from the viewpoint of being able to reduce the thickness deviation, the multi-manifold method is particularly preferred.

[0463] In the case of adopting the co-extrusion T-die method, the melting temperature of the resin in the extruder having a T-die is preferably set to a temperature of 80°C or more higher than the glass transition temperature (Tg) of each resin, more preferably set to a temperature of 100°C or more higher, and preferably set to a temperature of 180°C or less, more preferably set to a temperature of 150°C or less. By setting the melting temperature of the resin in the extruder to the lower limit value or more of the above preferred range, the fluidity of the resin can be sufficiently improved, and by setting it to the upper limit value or less of the above preferred range, the deterioration of the resin can be prevented.

[0464] Generally, the sheet-like molten resin extruded from the opening of the die is brought into close contact with a cooling drum. The method of bringing the molten resin into close contact with the cooling drum is not particularly limited, and for example, an air knife method, a vacuum box method, an electrostatic close contact method, etc. can be cited.

[0465] The number of cooling rollers is not particularly limited, but is usually two or more. Further, as a method of arranging the cooling rollers, for example, a linear type, a Z type, an L type, etc. can be cited, but there is no particular limitation. Further, the method of extruding the molten resin from the opening of the die through the cooling rollers is also not particularly limited.

[0466] Depending on the temperature of the cooling rollers, the state of adhesion of the extruded sheet resin to the cooling rollers changes. If the temperature of the cooling rollers is increased, the adhesion becomes good, but if the temperature is excessively increased, there is a possibility that the sheet resin will not peel off from the cooling rollers and will be wound around the rollers. Therefore, regarding the temperature of the cooling rollers, if the glass transition temperature of the resin in the layer of the resin extruded from the die that contacts the rollers is set as Tg, it is preferably set to (Tg + 30)°C or lower, and more preferably set within the range of (Tg - 5)°C to (Tg - 45)°C. By setting the temperature of the cooling rollers within the above preferred range, it is possible to prevent defects such as slipping and scratching.

[0467] Here, it is preferable to reduce the content of residual solvent in the film before stretching. As a method for achieving this purpose, for example, the following can be cited: (1) reducing the residual solvent in the resin used as a raw material; (2) pre-drying the resin before forming the film before stretching; etc. Pre-drying is performed, for example, by forming the resin into a granular form or the like and using a hot air dryer or the like. The drying temperature is preferably 100°C or higher, and the drying time is preferably 2 hours or longer. By performing pre-drying, it is possible to reduce the residual solvent in the film before stretching, and further, it is possible to prevent the extruded sheet resin from foaming.

[0468] (Coating method)

[0469] In the coating method, a solution of a material for a wavelength selective absorption filter is coated on a release film to form a coating. In order to control the adhesiveness to the coating, a release agent or the like can be appropriately pre-coated on the surface of the release film. The coating can be used after peeling off the release film after being laminated with other component layers via an adhesive layer in a subsequent process. Regarding the adhesive constituting the adhesive layer, any adhesive can be appropriately used. Further, in a state where a solution of a material for a wavelength selective absorption filter is coated on the release film or in a state where a coating is laminated, it is possible to appropriately stretch together with the release film.

[0470] From the viewpoints of being able to dissolve or disperse the material for a wavelength selective absorption filter; being easily formed into a uniform planar shape in the coating process and the drying process; being able to ensure liquid storage stability; having an appropriate saturated vapor pressure, etc., the solvent used in the solution of the material for a wavelength selective absorption filter can be appropriately selected.

[0471] -Addition of dyes (pigments) and anti-fading agents, etc.-

[0472] Regarding the timing of adding the above dye to the wavelength-selective absorption filter material, there is no particular limitation as long as it is added at the time of film formation. For example, it can be added at the time of synthesis of the above base resin, or it can be mixed with the wavelength-selective absorption filter material when preparing the coating solution of the wavelength-selective absorption filter material. In addition, the same applies to other components such as anti-fading agents that can be contained in the wavelength-selective absorption filter.

[0473] -Release film-

[0474] The film thickness of the release film for forming the wavelength-selective absorption filter of the present invention by a coating method or the like is preferably 5 to 100 μm, more preferably 10 to 75 μm, and further preferably 15 to 55 μm. If the film thickness is above the above-mentioned preferred lower limit value, it is easy to ensure sufficient mechanical strength, and it is not easy to cause problems such as curling, wrinkling, and buckling. And if the film thickness is below the above-mentioned preferred upper limit value, in the case of storing the multi-layer film of the wavelength-selective absorption filter and the release film of the present invention in a long-sized roll form, it is easy to adjust the surface pressure applied to the multi-layer film within an appropriate range, and it is difficult to cause adhesion problems.

[0475] The surface energy of the release film is not particularly limited, but by adjusting the correlation between the surface energy of the material of the wavelength-selective absorption filter and the coating solution and the surface energy of the surface of the release film on the side where the wavelength-selective absorption filter of the present invention is formed, the adhesion between the wavelength-selective absorption filter of the present invention and the release film can be adjusted. If the surface energy difference is reduced, the adhesion tends to increase, and if the surface energy difference is increased, the adhesion tends to decrease, and the surface energy difference can be appropriately set.

[0476] The surface energy of the release film can be calculated by Owens' method based on the contact angle values of water and diiodomethane. Regarding the measurement of the contact angle, for example, DM901 (manufactured by Kyowa Interface Science Co., Ltd., contact angle measuring instrument) can be used.

[0477] The surface energy of the surface of the release film on the side where the wavelength-selective absorption filter of the present invention is formed is preferably 41.0 to 48.0 mN / m, more preferably 42.0 to 48.0 mN / m. If the surface energy is above the above-mentioned preferred lower limit value, the thickness uniformity of the wavelength-selective absorption filter of the present invention can be improved, and if it is below the above-mentioned preferred upper limit value, it is easy to control the peeling force between the wavelength-selective absorption filter of the present invention and the release film within an appropriate range.

[0478] Moreover, the surface irregularities of the release film are not particularly limited, but can be adjusted according to the surface energy, hardness, and the correlation between the surface irregularities of the surface of the wavelength-selective absorption filter of the present invention and the surface energy and hardness of the surface of the release film on the side opposite to the side where the wavelength-selective absorption filter of the present invention is formed. For example, it is adjusted to prevent adhesion failure when storing the multi-layer film of the wavelength-selective absorption filter and the release film of the present invention in the form of a long-sized roll. If the surface irregularities are increased, there is a tendency to suppress adhesion failure. If the surface irregularities are decreased, there is a tendency for the surface irregularities of the wavelength-selective absorption filter of the present invention to decrease and the haze of the wavelength-selective absorption filter of the present invention to decrease, and it can be appropriately set.

[0479] As such a release film, any material and film can be appropriately used. As specific materials, polyester-based polymers (including polyethylene terephthalate-based films), olefin-based polymers, cycloolefin-based polymers, (meth)acrylic-based polymers, cellulose-based polymers, polyamide-based polymers, etc. can be cited. Moreover, in order to adjust the surface properties of the release film, surface treatment can be appropriately performed. For example, in order to reduce the surface energy, corona treatment, room temperature plasma treatment, saponification treatment, etc. can be performed, and in order to increase the surface energy, silicone treatment, fluorine treatment, olefin treatment, etc. can be performed.

[0480] -Peeling force between the wavelength-selective absorption filter and the release film-

[0481] When forming the wavelength-selective absorption filter of the present invention by a coating method, the peeling force between the wavelength-selective absorption filter of the present invention and the release film can be controlled by adjusting the material of the wavelength-selective absorption filter of the present invention, the material of the release film, the internal deformation of the wavelength-selective absorption filter of the present invention, etc. This peeling force can be measured, for example, in a test of peeling the release film in the 90° direction, and the peeling force when measured at a speed of 300 mm / min is preferably 0.001 to 5 N / 25 mm, more preferably 0.01 to 3 N / 25 mm, and further preferably 0.05 to 1 N / 25 mm. If it is above the above-mentioned preferred lower limit value, peeling other than the peeling process of the release film can be prevented, and if it is below the above-mentioned preferred upper limit value, peeling defects (for example, zipping or breakage of the wavelength-selective absorption filter of the present invention) in the peeling process can be prevented.

[0482] <Film thickness of the wavelength-selective absorption filter of the present invention>

[0483] 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 further preferably 2 to 8 μm. If it is below the above-mentioned preferred upper limit value, the effect of the anti-fading agent can be easily exhibited by adding a high concentration of dye to the thin film. On the other hand, if it is above the above-mentioned preferred lower limit value, it is easy to maintain the uniformity of the absorbance in the plane.

[0484] In the present invention, the film thickness of 1 to 18 μm means that the thickness of the wavelength selective absorption filter of the present invention measured at any part is within the range of 1 to 18 μm. The same applies to the film thickness of 1 to 12 μm and 2 to 8 μm. The film thickness can be measured by a micrometer manufactured by ANRITSU CORPORATION.

[0485] <Relative luminance>

[0486] When the wavelength selective absorption filter of the present invention is used on the front surface of an image display device, the relative luminance is preferably 82.0% or more, more preferably 82.4% or more. There is no particular limitation on the upper limit value, but it is actually 95% or less.

[0487] The above relative luminance is a value calculated by the method described in the following examples, and is the relative luminance based on the luminance of a display device equipped with a control filter containing no dye A and dye C.

[0488] <Color gamut of the wavelength selective absorption filter of the present invention>

[0489] Moreover, in the color reproduction region when the wavelength selective absorption filter of the present invention is used on the front surface of an image display device, the coverage rate with respect to the color gamut defined in DCI-P3 is preferably 80.0% or more, more preferably 83.0% or more, and further preferably 85.0% or more. There is no particular limitation on the upper limit value, but it is actually 99% or less.

[0490] Moreover, in the color reproduction region when the wavelength selective absorption filter of the present invention is used on the front surface of an image display device, the coverage rate with respect to the color gamut defined in NTSC is preferably 77.0% or more. There is no particular limitation on the upper limit value, but it is actually 99% or less.

[0491] The above color gamut is a value calculated for each display device equipped with the wavelength selective absorption filter of the present invention by the method described in the following examples.

[0492] <Light resistance of the wavelength selective absorption filter of the present invention>

[0493] From the viewpoint of preventing deterioration of display performance caused by external light, the wavelength selective absorption filter of the present invention preferably has light resistance. Specifically, the light resistance is evaluated as follows.

[0494] For the wavelength selective absorption filter of the present invention, use a super xenon lamp weather resistance tester SX75 (trade name, light source: 7.5 kW water-cooled xenon lamp, irradiation illuminance: 150 W / m 2 (ultraviolet rays 300 - 400 nm)) manufactured by Suga Test Instruments Co., Ltd. to irradiate light for 200 hours in an environment of 60 °C and a relative humidity of 50%. Measure the maximum absorption value before and after the light irradiation respectively, and calculate the light resistance by the following formula.

[0495] [Light resistance (%)] = ([Maximum absorption value after 200-hour light irradiation] / [Maximum absorption value before light irradiation]) × 100

[0496] Since the above light resistance test is an accelerated test, as a practical use level, as long as the light resistance shows 10% or more, there is no problem. As the wavelength selective absorption filter of the present invention, the above light resistance is preferably 50% or more, more preferably 70% or more. There is no particular limitation on the upper limit value, but it is actually 98% or less.

[0497] <Absorbance of the wavelength selective absorption filter of the present invention>

[0498] In the wavelength selective absorption filter of the present invention, the absorbance at the maximum absorption wavelength showing the maximum absorbance at a wavelength of 400 - 450 nm (hereinafter, also simply referred to as "Ab(λ max )".) is preferably 0.05 or more, more preferably 0.10 or more, and further preferably 0.20 or more.

[0499] In the wavelength selective absorption filter of the present invention, the absorbance at the maximum absorption wavelength showing the maximum absorbance at a wavelength of 560 - 600 nm (hereinafter, also simply referred to as "Ab(λ max )".) is preferably 0.10 or more, more preferably 0.20 or more, and further preferably 0.30 or more.

[0500] However, the absorbance of the wavelength selective absorption filter of the present invention can be adjusted according to the type of dye, the addition amount, or the film thickness.

[0501] Regarding the above absorbance, it can be measured and calculated by the method described in the examples.

[0502] <Water content of the wavelength selective absorption filter of the present invention>

[0503] Regarding the water content of the wavelength - selective absorption filter of the present invention, from the viewpoint of durability, regardless of the film thickness, it is preferably 0.5% by mass or less, more preferably 0.3% by mass or less under the conditions of 25°C and 80% relative humidity.

[0504] In this specification, the water content of the wavelength - selective absorption filter of the present invention can be measured using a sample with an appropriately increased film thickness as needed. After subjecting the sample to humidity conditioning for 24 hours or more, it is measured by the Karl Fischer method using a moisture meter, a sample drying device "CA - 03" and "VA - 05" (both manufactured by Mitsubishi Chemical Corporation), and the moisture content (g) is divided by the sample mass (g, including the moisture content) for calculation.

[0505] <Treatment of the wavelength - selective absorption filter of the present invention>

[0506] Preferably, a hydrophilic treatment is performed on the wavelength - selective absorption filter of the present invention by any of glow - discharge treatment, corona - discharge treatment, alkali saponification treatment, etc., and corona - discharge treatment is most preferred. It is also preferable to apply the methods disclosed in Japanese Patent Laid - Open No. 6 - 94915, Japanese Patent Laid - Open No. 6 - 118232, etc.

[0507] In addition, as needed, a heat - treatment process, a superheated steam contact process, an organic - solvent contact process, etc. can be performed on the obtained film. And surface treatment can be appropriately performed.

[0508] Furthermore, as the adhesive layer, a layer made of an adhesive composition in which (meth) acrylic resin, styrene resin, silicone resin, etc. are used as base polymers and cross - linkers such as isocyanate compounds, epoxy compounds, aziridine compounds, etc. are added can also be applied.

[0509] Preferably, the description of the adhesive layer in the OLED display device described later can be applied.

[0510] <Use of the wavelength - selective absorption filter of the present invention>

[0511] The wavelength - selective absorption filter of the present invention can preferably be used in image display devices such as televisions, notebook personal computers, desktop personal computers, smartphones, or tablets.

[0512] Hereinafter, the liquid - crystal display device and the OLED display device in the image display device will be described in detail.

[0513] [Liquid - crystal display device]

[0514] The liquid - crystal display device of the present invention includes the wavelength - selective absorption filter of the present invention.

[0515] In the liquid crystal display device of the present invention, as described later, the wavelength selective absorption filter of the present invention can be used as at least one of a polarizer protective film and an adhesive layer, and can also be included in a backlight unit used in the liquid crystal display device.

[0516] The liquid crystal display device preferably includes a wavelength selective absorption filter, a polarizer including a polarizer and a polarizer protective film, an adhesive layer, and a liquid crystal cell. Preferably, the polarizer is attached to the liquid crystal cell via the adhesive layer. In this liquid crystal display device, the wavelength selective absorption filter can also serve as a polarizer protective film or an adhesive layer. That is, the liquid crystal display device is divided into the following cases: a polarizer including a polarizer and a wavelength selective absorption filter (polarizer protective film), an adhesive layer, and a liquid crystal cell; and a polarizer including a polarizer and a polarizer protective film, a wavelength selective absorption filter (adhesive layer), and a liquid crystal cell.

[0517] Figure 1 is a schematic diagram showing an example of the liquid crystal display device of the present invention. In Figure 1 it, the liquid crystal display device 10 includes a liquid crystal cell having a liquid crystal layer 5 and upper and lower electrode substrates of the liquid crystal cell disposed above and below it, and upper and lower polarizers 1 and 8 disposed on both sides of the liquid crystal cell. A color filter layer may be laminated on the upper electrode substrate 3 or the lower electrode substrate 6. A backlight is disposed on the back surface of the liquid crystal display device 10 described above. As the light source of the backlight, the light source described in the aforementioned backlight unit can be used.

[0518] The upper polarizer 1 and the lower polarizer 8 each have a structure laminated in such a manner that a polarizer is sandwiched between two polarizer protective films. In the liquid crystal display device 10, it is preferable that at least one of the polarizers is a polarizer including the wavelength selective absorption filter of the present invention.

[0519] Further, in the liquid crystal display device 10, the liquid crystal cell and the polarizer (upper polarizer 1 and / or lower polarizer 8) can be attached via an adhesive layer (not shown). At this time, the wavelength selective absorption filter of the present invention can also serve as the aforementioned adhesive layer.

[0520] The liquid crystal display device 10 includes a direct-view image type, an image projection type, or a light modulation type. An active matrix liquid crystal display device using a three-terminal or two-terminal semiconductor element such as a TFT or MIM (Metal-Insulator-Metal) is effective in the present invention. Of course, a passive matrix liquid crystal display device represented by an STN (Super Twisted Nematic) mode called time-division driving is also effective.

[0521] When the wavelength selective absorption filter of the present invention is included in a backlight unit, the polarizer of the liquid crystal display device may be a general polarizer (a polarizer that does not include the wavelength selective absorption filter of the present invention) or a polarizer that includes the wavelength selective absorption filter of the present invention. Also, the adhesive layer may be a general adhesive layer (not the wavelength selective absorption filter of the present invention) or an adhesive layer based on the wavelength selective absorption filter of the present invention.

[0522] In the IPS (In Plane Switching) mode liquid crystal display device described in paragraphs 0128 to 0136 of Japanese Patent Application Laid-Open No. 2010-102296, in addition to preferably using the wavelength selective absorption filter of the present invention, it is also preferably used as the liquid crystal display device of the present invention. That is, as the liquid crystal display device of the present invention, in addition to including the wavelength selective absorption filter of the present invention as described above, the description of the IPS mode liquid crystal display device described in Japanese Patent Application Laid-Open No. 2010-102296 can be preferably applied.

[0523] <Polarizer>

[0524] The polarizer for the present invention includes a polarizer and at least one polarizer protective film.

[0525] The polarizer for the present invention preferably has a polarizer and polarizer protective films on both sides of the polarizer, and more preferably includes the wavelength selective absorption filter of the present invention as a polarizer protective film on at least one surface. A general polarizer protective film may be provided on the surface of the polarizer opposite to the surface having the wavelength selective absorption filter (the polarizer protective film of the present invention).

[0526] The film thickness of the polarizer protective film is generally preferably 5 μm or more and 120 μm or less, and more preferably 10 μm or more and 100 μm or less. The thin film is less likely to cause display unevenness after high temperature and high humidity over time when assembled into a liquid crystal display device, so it is preferred. On the other hand, if it is too thin, it is difficult to stably convey during the manufacture of the thin film and the production of the polarizer. When the wavelength selective absorption filter of the present invention also serves as a polarizer protective film, the thickness of the wavelength selective absorption filter preferably satisfies the above range.

[0527] -Performance of polarizer-

[0528] The degree of polarization of the polarizer for the present invention is preferably 99.950% or more, more preferably 99.970% in a more preferred range, and most preferably 99.990% or more.

[0529] In the present invention, for the degree of polarization of the polarizing plate, an automatic polarizing film measuring device: VAP-7070 (trade name, manufactured by JASCO Corporation) is used, and it is calculated by the following formula based on the orthogonal transmittance and parallel transmittance measured at wavelengths of 380 to 700 nm.

[0530] Degree of polarization (%) = [(parallel transmittance - orthogonal transmittance) / (orthogonal transmittance + parallel transmittance)] 1 / 2 ×100

[0531] The degree of polarization can be measured in the following manner. Two samples (5 cm × 5 cm) with a polarizing plate attached to glass via an adhesive are prepared. Regarding the orthogonal transmittance and parallel transmittance, the glass side of this sample is set facing the light source and measured. The two samples are measured, and their average values are taken as the orthogonal transmittance and parallel transmittance, respectively. When studying the influence of the polarizing plate protective film on the degree of polarization, the polarizing plate protective film to be evaluated is usually arranged and attached to the glass side.

[0532] Regarding other preferred optical properties, etc. of the polarizing plate used in the present invention, they are described in

[0238] to

[0255] of Japanese Unexamined Patent Application Publication No. 2007-086748, and it is preferred to satisfy these properties.

[0533] - Shape, structure -

[0534] Regarding the shape of the polarizing plate used in the present invention, it includes not only a polarizing plate in the form of a thin film piece cut into a size that can be directly assembled into a liquid crystal display device, but also a polarizing plate in the form of a long strip produced continuously and wound into a roll (for example, a roll length of 2500 m or more or 3900 m or more). For use in a large-screen liquid crystal display device, the width of the polarizing plate is preferably 1470 mm or more.

[0535] The polarizing plate used in the present invention is composed of a polarizer and at least one polarizing plate protective film, but it is also preferably further constituted by laminating a release film on the surface of one side of the polarizing plate.

[0536] The release film is used for the purpose of protecting the polarizing plate at the time of shipment of the polarizing plate, product inspection, etc. The release film is used for the purpose of covering the adhesive layer adhered to the liquid crystal panel, and is used for the side of the surface where the polarizing plate is adhered to the liquid crystal panel.

[0537] (Polarizer)

[0538] The polarizer used in the polarizing plate of the present invention will be described.

[0539] As a polarizer that can be used in the polarizing plate of the present invention, it is preferably composed of polyvinyl alcohol (PVA) and dichroic molecules. However, it is also possible to use a polyvinylene-based polarizer obtained by dehydrating and dechlorinating PVA and polyvinyl chloride to form a polyene structure and orienting it as described in Japanese Patent Laid-Open No. 11-248937.

[0540] -Film thickness of the polarizer-

[0541] The film thickness of the thin film before stretching the polarizer is not particularly limited. However, from the viewpoints of maintaining the stability of the thin film and the uniformity of stretching, it is preferably 1 μm to 1 mm, and particularly preferably 5 to 200 μm. Also, it is possible to use a thin PVA film such that the stress generated during stretching 4 to 6 times in water becomes 10 N or less as described in Japanese Patent Laid-Open No. 2002-236212.

[0542] -Manufacturing method of the polarizer-

[0543] As a manufacturing method of the polarizer, there is no particular limitation. However, for example, it is preferably to form a thin film of the above-mentioned PVA and then introduce dichroic molecules to form a polarizer. The manufacturing of the PVA thin film can be carried out with reference to the methods described in

[0213] to

[0237] of Japanese Patent Laid-Open No. 2007-86748, Japanese Patent No. 3342516, Japanese Patent Laid-Open No. 09-328593, Japanese Patent Laid-Open No. 2001-302817, Japanese Patent Laid-Open No. 2002-144401, etc.

[0544] (Laminating method of the polarizer and the polarizing plate protective film)

[0545] The polarizing plate for the present invention is manufactured by bonding (laminating) at least one polarizing plate protective film (preferably the wavelength selective absorption filter of the present invention) to at least one surface of the above-mentioned polarizer.

[0546] It is preferably manufactured by the following method: subjecting the polarizing plate protective film to alkali treatment and bonding it to both surfaces of a polarizer made by impregnating and stretching a polyvinyl alcohol film in an iodine solution using an aqueous solution of completely saponified polyvinyl alcohol.

[0547] As an adhesive for bonding the treated surface of the above-mentioned polarizing plate protective film to the polarizer, for example, polyvinyl alcohol-based adhesives such as polyvinyl alcohol and polyvinyl butyral, and vinyl-based latexes such as butyl acrylate can be cited.

[0548] In the polarizing plate for the present invention, the bonding method of the polarizing plate protective film and the above-mentioned polarizer is preferably carried out such that the transmission axis of the polarizer is substantially parallel, orthogonal, or at 45° to the slow axis of the above-mentioned polarizing plate protective film.

[0549] Regarding the measurement of the slow axis, it can be measured by various known methods. For example, it can be performed using a birefringence meter (KOBRADH, manufactured by Oji Scientific Instruments Co., Ltd.).

[0550] Here, substantially parallel means that the direction of the principal refractive index nx of the polarizer protective film intersects with the direction of the transmission axis of the polarizer at an angle with a deviation within ±5°, preferably within ±1°, and more preferably within ±0.5°. If the intersection angle is within 1°, the polarization degree performance under the cross-polarizer Nicol is not easily reduced, and light leakage is not likely to occur, so it is preferred.

[0551] The same applies to the case of substantially orthogonal or 45°. That the direction of the principal refractive index nx is orthogonal or at 45° to the direction of the transmission axis means that the intersection angle between the direction of the principal refractive index nx and the direction of the transmission axis is within the strict angle range of ±5° related to orthogonality and 45°, and the error from the strict angle is preferably within ±1°, and more preferably within ±0.5°.

[0552] (Functionalization of polarizer)

[0553] The polarizer used in the present invention can also be preferably used as a functionalized polarizer formed by laminating with an optical film having functional layers such as an antireflection film, a brightness enhancement film, a hard coat, a forward scattering layer, an antiglare (anti-reflection) layer, an antifouling layer, and an antistatic layer for improving the visual recognition of a display. Regarding the antireflection film, brightness enhancement film, other functional optical films, hard coat, forward scattering layer, and antiglare layer for functionalization, they are described in

[0257] to

[0276] of Japanese Patent Application Laid-Open No. 2007-86748, and a functionalized polarizer can be produced according to these descriptions.

[0554] For the polarizer of the present invention, as long as it includes the wavelength-selective absorption filter of the present invention, it is preferably to include the wavelength-selective absorption filter of the present invention as a polarizer protective film on at least one surface of the polarizer.

[0555] As the polarizer of the present invention, except for including the wavelength-selective absorption filter of the present invention, the descriptions related to the polarizer used in the above-mentioned present invention can be applied.

[0556] <Adhesive layer>

[0557] In the liquid crystal display device of the present invention, it is preferred that the polarizer is attached to the liquid crystal cell via an adhesive layer. The wavelength-selective absorption filter of the present invention can also serve as the above-mentioned adhesive layer. When the wavelength-selective absorption filter of the present invention does not also serve as the adhesive layer, a general adhesive layer can be used as the adhesive layer.

[0558] As the adhesive layer, there is no particular limitation as long as it can bond the polarizing plate to the liquid crystal cell. However, for example, acrylic-based, urethane-based, polyisobutene, etc. are preferred.

[0559] When the wavelength selective absorption filter of the present invention also serves as the adhesive layer, the adhesive layer contains the above-mentioned pigment and the above-mentioned binder resin, and further contains a crosslinking agent, a coupling agent, etc. to impart adhesiveness.

[0560] When the wavelength selective absorption filter also serves as the adhesive layer, the adhesive layer preferably contains 90 to 99.94% by mass of the above-mentioned binder resin, and preferably contains 95 to 99.7%. The content of the pigment is as described above.

[0561] The thickness of the adhesive layer is not particularly limited, but for example, it is preferably 1 to 50 μm, more preferably 3 to 30 μm.

[0562] <Liquid crystal cell>

[0563] The liquid crystal cell is not particularly limited, and a general liquid crystal cell can be used.

[0564] [OLED display device]

[0565] The organic electroluminescence display device of the present invention (referred to as an organic EL (electroluminescence) display device or an OLED (Organic Light Emitting Diode) display device, and also simply referred to as an OLED display device in the present invention.) includes the wavelength selective absorption filter of the present invention.

[0566] The OLED display device equipped with the wavelength selective absorption filter of the present invention can achieve high color reproducibility while suppressing the reduction of relative brightness.

[0567] As the OLED display device of the present invention, as long as it includes the wavelength selective absorption filter of the present invention, as other structures, the structures of commonly used OLED display devices can be used without particular limitation. As an example of the structure of the OLED display device of the present invention, there is no particular limitation, but for example, a display device including 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 this order from the opposite side of the external light can be cited. In addition, when the above-mentioned gas barrier layer is provided, it is provided at least in a structure located on the side closer to the external light than the wavelength selective absorption filter of the present invention.

[0568] The above OLED display element has a structure in which an anode electrode, a light-emitting layer, and a cathode electrode are laminated in sequence. Between the anode electrode and the cathode electrode, in addition to the light-emitting layer, a Hall injection layer, a Hall transport layer, an electron transport layer, an electron injection layer, etc. are also included. In addition, for example, the description in Japanese Patent Laid-Open No. 2014-132522 can also be referred to.

[0569] Moreover, as the above color filter, in addition to the ordinary color filter, a color filter laminated with quantum dots can also be used.

[0570] A resin film can also be used instead of the above glass.

[0571] The method for forming the color image of the OLD applicable to the OLD display device of the present invention is not particularly limited, and any one of the three-color separation coating method, the color conversion method, and the color filter method of R (red), G (green), and B (blue) can be used, and the three-color separation coating method can be preferably used. Therefore, as the light source of the OLED display device of the present invention, each light-emitting layer corresponding to the above image forming method can also be applied. For example, as the light-emitting source of the OLED display device, B (Blue (blue), 460 nm), G (Green (green), 520 nm), and R (Red (red), 620 nm) can be used.

[0572] <Adhesive layer>

[0573] In the OLED display device of the present invention, the wavelength-selective absorption filter of the present invention is preferably bonded to the glass (substrate) via an adhesive layer on the surface on the side opposite to the external light. As the adhesive, the adhesives described in the liquid crystal display device can be used.

[0574] <Substrate>

[0575] In the OLED display device of the present invention, the wavelength-selective absorption filter of the present invention is preferably bonded to the glass (substrate) via an adhesive layer on the surface on the side opposite to the external light.

[0576] The method for forming the above adhesive layer is not particularly limited. For example, the following methods can be used: a method of coating an adhesive composition on the wavelength-selective absorption filter of the present invention using a general device such as a bar coater and drying and curing it; and a method of first coating the adhesive composition on the surface of a peelable substrate, drying it, and then transferring the adhesive layer to the wavelength-selective absorption filter of the present invention using the peelable substrate and aging and curing it.

[0577] As the peelable substrate, there is no particular limitation, and any peelable substrate can be used. For example, the release film in the manufacturing method of the wavelength-selective absorption filter of the present invention can be cited.

[0578] In addition, the conditions for coating, drying, curing, and solidifying can also be appropriately adjusted according to conventional methods.

[0579] Examples

[0580] Hereinafter, the present invention will be described in further detail based on examples. Regarding the materials, amounts used, ratios, treatment contents, treatment sequences, etc. shown in the following examples, appropriate changes can be made as long as the gist of the present invention is not deviated from. Therefore, the scope of the present invention is not limited to the examples shown below.

[0581] In addition, in the following examples, "parts" and "%" indicating composition are based on mass unless otherwise specified.

[0582] Moreover, from the preparation process of the wavelength-selective absorption filter-forming liquid to the manufacturing process of the wavelength-selective absorption filter with a substrate using the wavelength-selective absorption filter-forming liquid and the process until the light resistance test are all carried out under yellow light to avoid being irradiated with ultraviolet rays.

[0583] Examples

[0584] [1. Fabrication of Wavelength-Selective Absorption Filter]

[0585] The materials for fabricating the wavelength-selective absorption filter are shown below.

[0586] <Substrate Resin>

[0587] (Resin 1)

[0588] The resin obtained by heating polystyrene resin (manufactured by PS Japan Corporation, SGP-10 (trade name) of PSJ-polystyrene GPPS, Tg 100°C, fd 0.56) at 110°C and then naturally cooling it to room temperature (23°C) is used as Resin 1.

[0589] (Resin 2)

[0590] Polyphenylene ether resin (manufactured by Asahi Kasei Corporation, ZYLON S201A (trade name), poly(2,6-dimethyl-1,4-phenylene ether), Tg 210°C)

[0591] (Elongating Resin Component 1)

[0592] ASAFLEX810 (trade name, manufactured by Asahi Kasei Corporation, styrene-butadiene resin)

[0593] (Peeling Property Control Resin Component 1)

[0594] BYRON550 (Product name, manufactured by TOYOBO CO., LTD., polyester-based additive)

[0595] <Dye A>

[0596] Dye represented by the general formula (A1)

[0597] [Chemical formula 47]

[0598]

[0599] The following dye used in the examples of Japanese Patent Laid-Open No. 2017-142412

[0600] [Chemical formula 48]

[0601]

[0602] <Dye C>

[0603]

[0604] <Additive>

[0605] (Anti-fading agent 1)

[0606] Exemplary compound IV-8 in the above anti-fading agent

[0607] [Chemical formula 49]

[0608]

[0609] (Leveling agent 1)

[0610] Use the polymer surfactant composed of the following components as leveling agent 1. In the following structural formula, the ratio of each component is a molar ratio, and t-Bu refers to tert-butyl.

[0611] [Chemical formula 50]

[0612]

[0613] (Substrate 1)

[0614] Use the polyethylene terephthalate film Lumirror XD-510P (product name, film thickness 50 μm, manufactured by TORAY INDUSTRIES, INC.) as substrate 1.

[0615] <1> Fabrication of wavelength-selective absorption filter No. 101 with substrate

[0616] (Preparation of toluene solution of extensible resin component 1)

[0617] 3.0 parts by mass of the elongation resin component 1 was dissolved in 97.0 parts by mass of toluene. Then, 5 parts by mass of KYOWAAD 700SEN-S (trade name, manufactured by Kyowa Chemical Industry Co., Ltd.) was added, and after stirring at room temperature for 1 hour, it was filtered using a metal sintered filter (FH025 (trade name), manufactured by NIHON PALL LTD.) with an absolute filtration accuracy of 2.5 μm to remove KYOWAAD 700SEN-S, thereby preparing a toluene solution of the elongation resin component 1 with a concentration of 3% by mass from which the alkali component was removed.

[0618] (1) Preparation of the wavelength selective absorption filter forming liquid

[0619] The respective components were mixed according to the composition shown below to prepare the wavelength selective absorption filter forming liquid (composition) No. 101.

[0620]

[0621] Next, the obtained wavelength selective absorption filter forming liquid No. 101 was filtered using a filter paper (#63, manufactured by TOYO ROSHI KAISHA, Ltd.) with an absolute filtration accuracy of 10 μm, and further filtered using a metal sintered filter (trade name: PALL Filter PMF, media code: FH025, manufactured by NIHON PALL LTD.) with an absolute filtration accuracy of 2.5 μm.

[0622] (2) Fabrication of the wavelength selective absorption filter with a substrate

[0623] The wavelength selective absorption filter forming liquid No. 101 after the above filtration treatment was applied to the substrate 1 using a bar coater so that the dried film thickness became 2.5 μm, and dried at 130 °C, thereby fabricating the wavelength selective absorption filter No. 101 with a substrate.

[0624] <2> Fabrication of the wavelength selective absorption filters No. 102 - 104, 201 - 204 with a substrate

[0625] The type and amount of the dye were changed to the contents described in Table 1, and except for this, the wavelength selective absorption filters No. 102 - 104 and 201 - 204 were fabricated in the same manner as the fabrication of the wavelength selective absorption filter No. 101 with a substrate.

[0626] Here, Nos. 101 to 104 are the wavelength - selective absorption filters of the present invention, and Nos. 202 to 204 are the wavelength - selective absorption filters for comparison. In addition, No. 201 is a control filter without dye.

[0627] For these wavelength - selective absorption filters of Nos. 101 to 104, 202, and 203, the blending amount of dye C was adjusted so that the relative brightness described below became 82.0 to 83.0%. And for the wavelength - selective absorption filter containing dye A, the blending amount of dye A was adjusted so that the NTSC coverage rate described below became 77.0% or more. Thus, the difference in the coverage rate of the color gamut can be discussed. In addition, as described later, in the wavelength - selective absorption filter of No. 204, the coverage rate of the color gamut cannot be adjusted to the desired level by adjusting the blending amount of dye A.

[0628] [Evaluation]

[0629] For the wavelength - selective absorption filter with a substrate manufactured as described above, the following evaluations were carried out. The results are shown in Table 1 together.

[0630] <Absorption maximum value of the wavelength - selective absorption filter>

[0631] Using a UV3150 spectrophotometer (trade name) manufactured by SHIMADZU CORPORATION, the absorbance in the wavelength range of 380 nm to 800 nm was measured for the wavelength - selective absorption filter with a substrate at every 1 nm. Using the absorbance Ab x (λ) of the wavelength - selective absorption filter with a substrate at each wavelength λ nm and the absorbance Ab0(λ) of the control filter without dye (i.e., the wavelength - selective absorption filter of No. 201), the absorbance Ab(λ) of the wavelength - selective absorption filter was calculated by the following formula.

[0632] Ab(λ)=Ab x (λ)-Ab0(λ)

[0633] Hereinafter, the wavelength showing the maximum absorbance Ab(λ) among the wavelengths showing the maximum absorption in the absorbance Ab(λ) of the wavelength - selective absorption filter in the region of wavelengths from 380 to 800 nm is defined as the maximum absorption wavelength (hereinafter, also simply referred to as “λ max ”). And the absorbance at this λ max is defined as the absorption maximum value (hereinafter, also simply referred to as “Ab(λ max )”).

[0634] [2. Fabrication of polarizer]

[0635] <1>Surface treatment of the wavelength - selective absorption filter

[0636] With respect to the wavelength selective absorption filters with substrates numbered 101 to 104 and 201 to 204, the surface on the side opposite to the substrate film was subjected to corona treatment, and the surface-treated wavelength selective absorption filters with substrates numbered 101 to 104 and 201 to 204 were produced.

[0637] <2> Fabrication of the polarizer (polarization layer)

[0638] According to Example 1 of Japanese Patent Laid-Open No. 2001-141926, a circumferential speed difference was applied between two pairs of pinch rolls, and stretching was performed in the long side direction, thereby fabricating a polarization layer containing a polyvinyl alcohol resin with a thickness of 12 μm.

[0639] Specifically, a long strip polyvinyl alcohol film with a thickness of 75 μm (manufactured by KURARAY CO., LTD., trade name: 9X75RS) was continuously conveyed through guide rollers, immersed in a water bath at 30 °C to swell it 1.5 times, and after performing a stretching treatment to a stretching ratio of 2 times, it was immersed in a dyeing bath (30 °C) containing iodine and potassium iodide for dyeing treatment and then subjected to a stretching treatment to a stretching ratio of 3 times. Next, it was subjected to a crosslinking treatment in an acid bath (60 °C) containing boric acid and potassium iodide and then subjected to a stretching treatment to a stretching ratio of 6.5 times, and dried at 50 °C for 5 minutes, thereby fabricating the polarization layer.

[0640] <3> Fabrication of the front polarizer protective film (outer polarizer protective film)

[0641] (1) Preparation of the (meth)acrylic resin A

[0642] 8000 g of methyl methacrylate (MMA), 2000 g of methyl 2-(hydroxymethyl)acrylate (MHMA), and 10000 g of toluene as a polymerization solvent were charged into a reaction kettle with an internal volume of 30 L equipped with a stirring device, a temperature sensor, a cooling tube, and a nitrogen inlet tube, and while introducing nitrogen, the temperature was raised to 107 °C. When the circulation started with the temperature increase, 10 g of tert-amyl peroxyisobutyrate as a polymerization initiator was added, and while dropping a solution containing 20 g of tert-amyl peroxyisobutyrate and 100 g of toluene over 2 hours, solution polymerization was carried out under reflux at about 105 to 110 °C, and further aging was performed for 4 hours. The polymerization reaction rate was 95%, and the content (mass ratio) of MHMA in the obtained polymer was 20%.

[0643] Next, 10 g of a mixture of stearyl phosphate and distearyl phosphate (manufactured by Sakai Chemical Industry Co., Ltd., trade name: Phoslex A-18), which is a cyclization catalyst, was added to the obtained polymerization solution, and a cyclization condensation reaction was carried out for 5.5 hours under reflux at about 80 to 100 °C.

[0644] Next, the obtained polymerization solution that had undergone the cyclization condensation reaction was introduced into an exhaust-type twin-screw extruder (φ = 29.75 mm, L / D = 30, where L represents the outer diameter of the screw and D represents the length of the screw) at a treatment speed of 2.0 kg / h in terms of resin amount conversion, with a barrel temperature of 260 °C, a rotation speed of 100 rpm, a vacuum degree of 13 to 400 hPa (10 to 300 mmHg), 1 back vent hole, and 4 front vent holes. The cyclization condensation reaction and devolatilization were carried out in the extruder. Then, after the devolatilization was completed, the resin remaining in the extruder in a hot-melt state was discharged from the front end of the extruder and pelletized by a pelletizer to obtain a (meth)acrylic resin A. The (meth)acrylic resin A has a lactone ring structure. The weight-average molecular weight of this resin is 110,000, and the glass transition temperature is 125 °C.

[0645] (2) Production of the outer polarizer protective film

[0646] 100 parts by mass of the above-mentioned (meth)acrylic resin A and 10 parts by mass of the rubber-like elastomer C-1 were supplied to a twin-screw extruder and melt-extruded into a sheet at about 280 °C to produce a long strip-shaped outer polarizer protective film with a thickness of 40 μm. In addition, as the rubber-like elastomer C-1, Kane Ace M-210 (trade name, manufactured by KANEKA CORPORATION) was used.

[0647] In the present invention, the front polarizer protective film refers to the protective film of the polarizer provided on both sides of the liquid crystal panel that is on the side of the viewer when assembled into the liquid crystal display device, and the outer polarizer protective film refers to the protective film of the polarizer provided on both sides of the polarizer that is on the side away from the liquid crystal panel when assembled into the liquid crystal display device.

[0648] <4> Production of the polarizer

[0649] A polarizer was produced by laminating in the following manner the wavelength-selective absorption filter with a substrate that had been surface-treated, the polarization layer, and the outer polarizer protective film produced above in sequence. The wavelength-selective absorption filter functions as the inner polarizer protective film in the polarizer.

[0650] First, the above-mentioned polarizing layer and the above-mentioned surface-treated wavelength-selective absorption filter with a substrate were laminated by roll-to-roll using a 3% by mass aqueous solution of polyvinyl alcohol (manufactured by KURARAY CO., LTD., trade name: PVA-117H) in such a manner that the corona-treated surface of the wavelength-selective absorption filter (inner polarizer protective film) faced the polarizing layer side, so that the absorption axis of the polarizing layer was parallel to the long side direction of the surface-treated wavelength-selective absorption filter with a substrate, thereby obtaining laminate A. In addition, the long side direction of the surface-treated wavelength-selective absorption filter with a substrate refers to the length direction of substrate 1.

[0651] Next, using a gravure coater, an adhesive M having the following composition was applied to the outer polarizer protective film so that the thickness became 5 μm, thereby preparing a front polarizer protective film with an adhesive. Next, for the front polarizer protective film with an adhesive and the above laminate A, the surface of the front polarizer protective film with an adhesive side was bonded to the surface of the polarizing layer of the laminate A, and ultraviolet rays were irradiated from the laminate A side, thereby fabricating a polarizer. In addition, the linear velocity was set to 20 m / min, and the cumulative light amount of ultraviolet rays was set to 300 mJ / cm 2 . Here, the transmission axis of the polarizer (polarizing layer) was configured to be orthogonal to the conveying direction of the outer polarizer protective film.

[0652] - Composition of Adhesive M -

[0653] 2-Hydroxyethyl acrylate 100 parts by mass

[0654] Toluene diisocyanate 10 parts by mass

[0655] Photoinitiator (trade name: Irgacure 907, manufactured by BASF) 3 parts by mass

[0656] Next, after drying at 70 °C, the substrate film of the wavelength-selective absorption filter with a substrate, i.e., substrate 1 (polyethylene terephthalate film), was continuously peeled off using the same device as the peeling device of the partition with a peeling roller, and a commercially available acrylate-based adhesive was further applied to the exposed wavelength-selective absorption filter to fabricate a polarizer.

[0657] This polarizer has a structure in which an acrylate-based adhesive layer / wavelength-selective absorption filter / polyvinyl alcohol layer / polarizing layer / adhesive M / outer polarizer protective film are laminated in sequence.

[0658] [Fabrication of Liquid Crystal Display Device]

[0659] The liquid crystal panel of a commercially available liquid crystal display device (manufactured by Xiaomi Inc., product name: L43M5-4X) was taken out, and the polarizer on the front side (the side visible to the viewer) was peeled off. Instead, the polarizer prepared above was attached to the acrylate-based adhesive layer side. Thus, a liquid crystal display device was fabricated.

[0660] [Evaluation of Color Reproduction Region]

[0661] In the fabricated liquid crystal display device, full-screen displays of white, red, green, and blue were performed respectively. The brightness of the white display and the chromaticities of red, green, and blue were measured using a spectroradiometer (manufactured by TOPCON TECHNOHOUSE CORPORATION., product name: SR-UL2).

[0662] The area of the overlapping part of the triangle formed by connecting the measured chromaticity points of red, green, and blue on the xy chromaticity diagram in the CIE (International Commission on Illumination) 1931 xyY colorimetric system and the triangle formed by connecting the three primary color points of the NTSC standard or the DCI-P3 standard was obtained. The area of this overlapping part was divided by the area of the triangle formed by connecting the three primary color points of the NTSC standard or the DCI-P3 standard, and the coverage rates relative to the NTSC standard and the DCI-P3 standard were calculated respectively. In Table 1, these coverage rates are shown in the color gamut column.

[0663] In the present invention, the coverage rate relative to the NTSC standard (hereinafter, simply referred to as "NTSC coverage rate".) of 77.0% or more is the acceptable level, and the coverage rate relative to the DCI-P3 standard (hereinafter, simply referred to as "DCI-P3 coverage rate".) of 80.0% or more is the acceptable level.

[0664] In addition, the three primary color points of the NTSC standard are as follows.

[0665] Red: x = 0.670, y = 0.330,

[0666] Green: x = 0.210, y = 0.710,

[0667] Blue: x = 0.140, y = 0.080,

[0668] And the three primary color points of the DCI-P3 standard are as follows.

[0669] Red: x = 0.680, y = 0.320

[0670] Green: x = 0.265, y = 0.690

[0671] Blue: x = 0.150, y = 0.060

[0672] (2) Relative brightness

[0673] Regarding the brightness of white display measured when using a wavelength - selective absorption filter, calculate the relative brightness with respect to the brightness of white display measured when using a control filter without dye (i.e., the wavelength - selective absorption filter of No. 201).

[0674] In the present invention, a relative brightness of 82.0% or more is the qualified level, and more preferably 82.4% or more.

[0675] <Evaluation of lightfastness>

[0676] For the wavelength - selective absorption filter with a substrate, use a super xenon lamp weather resistance tester SX75 manufactured by Suga Test Instruments Co., Ltd. (product name, light source: 7.5 kW water - cooled xenon lamp, irradiation illuminance: 150 W / m 2 (ultraviolet rays 300 - 400 nm)), and irradiate with light for 200 hours in an environment of 60 °C and a relative humidity of 50%. Measure the maximum absorption values before and after this light irradiation, and calculate the lightfastness by the following formula.

[0677] [Lightfastness (%)] = ([Maximum absorption value after 200 - hour light irradiation] / [Maximum absorption value before light irradiation]) × 100

[0678] Since the above - mentioned lightfastness test is equivalent to an accelerated test, as a practical use level, as long as the lightfastness shows 10% or more, there is no problem. In the present invention, it is preferably 70% or more.

[0679]

[0680] (Remarks in the table)

[0681] The content of the dye refers to the content ratio of the dye in the wavelength - selective absorption filter under the mass standard of the dye.

[0682] The mark "-" in the dye column indicates that the dye is not contained.

[0683] λ in Dye A and Dye C max respectively refer to the wavelength in the region of 380 - 800 nm of the wavelength - selective absorption filter that is derived from Dye A or Dye C and shows the highest absorbance Ab(λ) among the maximum absorption wavelengths, and the unit is nm.

[0684] Ab(λ max ) refers to the absorbance value at the maximum absorption wavelength λ max .

[0685] The "-" mark in the light resistance evaluation column indicates that the dye is not contained.

[0686] "NTSC" refers to the NTSC coverage rate, and "DCI-P3" refers to the DCI-P3 coverage rate.

[0687] The following is known from Table 1.

[0688] The wavelength selective absorption filters No. 202 and 203 of the comparative examples do not contain the dye A specified in the present invention. In the wavelength selective absorption filters No. 202 and 203 of these comparative examples, when the relative luminance is adjusted to a desired level (82.0% or more), the NTSC coverage rate is as low as less than 77.0%, and the color reproducibility is insufficient. As described above, by containing the dye C, the color reproducibility can be improved with respect to the dye-free wavelength selective absorption filter of No. 201. However, in the case where the dye A specified in the present invention is not contained, even if the content of the dye C is adjusted, it is impossible to achieve both excellent color reproducibility and high luminance.

[0689] Furthermore, the wavelength selective absorption filter No. 204 of the comparative example does not contain the dye C specified in the present invention. In the wavelength selective absorption filter No. 204 of this comparative example, the NTSC coverage rate is 72.4% and cannot be adjusted to 77.0% or more, and the DCI-P3 coverage rate is also 77.0% and less than 80.0%, and the color reproduction region is narrow. It is considered that this is because: the blue absorption from the dye A is on the long wavelength side compared to the chromaticity points of the blue of NTSC and DCI-P3. Therefore, in the case where the dye C specified in the present invention is not contained, even if the content of the dye A is adjusted, it is difficult to increase the NTSC coverage rate and the DCI-P3 coverage rate, and excellent color reproducibility cannot be exhibited.

[0690] In contrast, it is known that in the wavelength selective absorption filters No. 101 to 104 of the present invention, the NTSC coverage rate is 77.0% or more, the DCI-P3 coverage rate is 85.0%, the color reproduction region is expanded, and furthermore, the relative luminance is as high as 82.0% or more, and both excellent color reproducibility and high luminance can be achieved. Also, it is known that Nos. 101 to 103 containing the pigment represented by the general formula (A1) as the dye A have excellent light resistance.

[0691] The present invention has been described together with its embodiments. However, unless otherwise specified, we do not intend to limit our invention to any details of the description, and it should be broadly interpreted without departing from the spirit and scope of the invention shown in the appended claims.

[0692] This application claims the priority of Japanese Patent Application No. 2020-051873 filed in the Japanese Patent Office on March 23, 2020. By reference thereto, the contents thereof are incorporated herein by reference as a part of the description of this specification.

[0693] Symbol Explanation

[0694] 1 - Upper polarizer, 2 - Direction of the absorption axis of the upper polarizer, 3 - Upper electrode substrate of the liquid crystal cell, 4 - Direction of the alignment control of the upper substrate, 5 - Liquid crystal layer, 6 - Lower electrode substrate of the liquid crystal cell, 7 - Direction of the alignment control of the lower substrate, 8 - Lower polarizer, 9 - Direction of the absorption axis of the lower polarizer, B - Backlight unit, 10 - Liquid crystal display device.

Claims

1. A wavelength-selective absorption filter containing a resin and the following dyes A and C having main absorption wavelength bands in different wavelength regions, wherein, The dyes A and C are non-fluorescent. Dye A: A dye having a main absorption wavelength band at a wavelength of 400 to 450 nm in a wavelength-selective absorption filter; Dye C: A dye having a main absorption wavelength band at a wavelength of 560 to 600 nm in a wavelength-selective absorption filter, The dye A is a pigment represented by the following general formula (A1), In the above formula, R 1 and R 2 each independently represent an alkyl group or an aryl group, and R 3 to R 6 each independently represent a hydrogen atom or a substituent, and R 5 and R 6 may be bonded to each other to form a 6-membered ring.

2. The wavelength-selective absorption filter according to claim 1, wherein, The dye C is a tetraaza porphyrin-based pigment, a squarylium-based pigment, or a cyanine-based pigment.

3. The wavelength-selective absorption filter according to claim 1, wherein, The dye C is a squarylium-based pigment represented by the following general formula (1), In general formula (1), A and B each independently represent an aryl group with or without substituents, a heterocyclic group with or without substituents, or -CH=G, and G represents a heterocyclic group with or without substituents.

4. The wavelength-selective absorption filter according to any one of claims 1 to 3, wherein, The content of the dye A is 0.01% by mass or more and 45% by mass or less.

5. The wavelength-selective absorption filter according to any one of claims 1 to 3, wherein, The content of the dye C is 0.05% by mass or more and 50% by mass or less.

6. The wavelength-selective absorption filter according to any one of claims 1 to 3, wherein, It further contains a fade-preventing agent represented by the following general formula (IV), In general formula (IV), R 10 represents an alkyl group, an alkenyl group, an aryl group, a heteroatom-containing cyclic group, or a group represented by R 18 CO-, R 19 SO2-, or R 20 NHCO-; R 18 , R 19 and R 20 each independently represent an alkyl group, an alkenyl group, an aryl group, or a heteroatom-containing cyclic group; R 11 and R 12 each independently represent 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 represent a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group, wherein the alkyl group in R 10 to R 20 includes an aralkyl group.

7. A polarizer including the wavelength-selective absorption filter according to claim 1 or 2.

8. An organic electroluminescent display device or a liquid crystal display device including the wavelength-selective absorption filter according to claim 1 or 2.

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