Colored layer forming composition, optical film, and display device

Abstract

The composition for forming a colored layer contains a pigment (A), an active energy ray-curable resin (B), a photopolymerization initiator (C), a solvent (D), and an additive (E). The pigment (A) contains at least one of a first pigment, a second pigment, and a third pigment. The maximum absorption wavelength of the first coloring material is in the range of 470-530 nm, and the half-value width of the absorption spectrum is 15-45 nm. The maximum absorption wavelength of the second coloring material is in the range of 560-620 nm, and the half-value width of the absorption spectrum is 15-55 nm. The wavelength at which the transmittance of the third colorant is the lowest in the wavelength range of 380-780 nm is within the range of 650-780 nm. The additive (E) contains a compound A and a chalcogenide antioxidant, and when the content of the chalcogenide antioxidant is 1, the content of the compound A is 0.01-2.

Description

Technical Field

[0001] The present invention relates to a composition for forming a colored layer, an optical film, and a display device.

[0002] This application claims the priority based on Tokugan Application No. 2022-078418 filed in Japan on May 11, 2022, the contents of which are incorporated herein by reference. Background Art

[0003] Whether indoors or outdoors, display devices are mostly used in an environment where external light is incident. External light incident on the display device is reflected on the surface of the display device, resulting in reduced display quality. Among them, self-luminous display devices such as organic light-emitting display devices have the problem that electrodes and other large amounts of metal wiring strongly reflect external light, which easily reduces display quality. However, due to their excellent miniaturization, low power consumption, high brightness, and high response speed, they are expected to be the next generation of display devices.

[0004] In order to solve the problem of deterioration in display quality due to the reflection of external light, there is a configuration in which a polarizing plate and a phase retardation plate are arranged on the display surface side to suppress the reflection of external light.

[0005] However, in the method using a polarizing plate and a phase retarder, a considerable portion of the light emitted from the display device is lost when it passes through the polarizing plate and the phase retarder and is emitted to the outside, which is likely to lead to a reduction in the life of the element.

[0006] Patent document 1 proposes an organic light-emitting display device, which includes a display substrate including an organic light-emitting element and a sealing substrate disposed apart from the display substrate, and a filler that selectively absorbs external light by wavelength band to adjust transmittance is filled in the space between the display substrate and the sealing substrate. According to the invention of patent document 1, the reflection of external light is suppressed to improve visibility, and since light of a wavelength band that reduces color purity is selectively absorbed from the light emitted from the display device, color purity is also improved.

[0007] Regarding the improvement of color purity, Patent Document 2 discloses a structure containing a pigment having a maximum absorption wavelength in at least the wavelength ranges of 480 to 510 nm and 580 to 610 nm.

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: Japanese Patent No. 5673713

[0011] Patent Document 2: Japanese Patent Application Publication No. 2019-56865

[0012] Patent Document 3: International Publication No. 2021 / 066082 Summary of the invention

[0013] Technical problem to be solved by the invention

[0014] Many wavelength selective absorption dyes have low light resistance and heat resistance, and the function of the dye decreases over time, and the color purity improvement effect may not be fully exerted.

[0015] In connection with this problem, Patent Document 3 discloses a structure in which a predetermined compound is added to a pigment as an anti-fading agent and a gas barrier layer is provided. However, provision of a gas barrier layer leads to a thicker film and increased costs, and there is a possibility that the pigment may be degraded from defective portions of the gas barrier layer. Furthermore, the inventors have found in their research that when only the anti-fading agent is added without providing a gas barrier layer, a phenomenon in which light resistance is improved but heat resistance is reduced is observed.

[0016] In view of the above circumstances, an object of the present invention is to provide a composition for forming a colored layer that can form a colored layer that can withstand long-term use without requiring a gas barrier layer.

[0017] Another object of the present invention is to provide an optical film and a display device that can maintain high display quality even when used for a long period of time without requiring a gas barrier layer.

[0018] Means for solving technical problems

[0019] A first aspect of the present invention is a colored layer-forming composition comprising a dye (A), an active energy ray-curable resin (B), a photopolymerization initiator (C), a solvent (D), and an additive (E).

[0020] The pigment (A) contains at least one of a first pigment, a second pigment, and a third pigment. The maximum absorption wavelength of the first pigment is in the range of 470 to 530 nm and the half-value width of the absorption spectrum is 15 to 45 nm. The maximum absorption wavelength of the second pigment is in the range of 560 to 620 nm and the half-value width of the absorption spectrum is 15 to 55 nm. The wavelength with the lowest transmittance of the third pigment in the wavelength range of 380 to 780 nm is in the range of 650 to 780 nm.

[0021] The additive (E) contains a compound A represented by the following formula (i) and a sulfur-based antioxidant. When the content of the sulfur-based antioxidant is set to 1, the content of the compound A is 0.01 to 2.

[0022] [Chemical formula 1]

[0023]

[0024] In the above formula (i), R 1 Each independently represents an alkyl group, an alkenyl group, an aryl group, a heterocyclic group or R 9 CO - , R 10 SO2 - or R 11 NHCO - The group shown, wherein R 9 , R 10 and R 11 Each independently represents an alkyl group, an alkenyl group, an aryl group or a heterocyclic group. 2 and R 3 Each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group or an alkenyloxy group, and R 4 ~R 8 Each independently represents a hydrogen atom, an alkyl group, an alkenyl group or an aryl group.

[0025] The second aspect of the present invention is an optical film comprising: a colored layer which is a cured product of the colored layer-forming composition of the first aspect; a transparent substrate located on one surface of the colored layer; and a functional layer located on one surface or the other surface of the colored layer.

[0026] One or both of the transparent substrate and the functional layer have an ultraviolet shielding efficiency of 85% or more as measured according to the method described in JIS L1925, and the functional layer functions as an antireflection layer or an antiglare layer.

[0027] A third aspect of the present invention is a display device including the optical film according to the second aspect.

[0028] Effects of the Invention

[0029] According to the present invention, it is possible to provide a composition for forming a colored layer that can form a colored layer that can withstand long-term use without requiring a gas barrier layer.

[0030] Furthermore, according to the present invention, it is possible to provide an optical film and a display device that can maintain high display quality even when used for a long period of time without requiring a gas barrier layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a cross-sectional view of an optical film according to one embodiment of the present invention.

[0032] Figure 2 This is a cross-sectional view of an optical film according to another embodiment of the present invention.

[0033] Figure 3 This is a cross-sectional view of an optical film according to another embodiment of the present invention.

[0034] Figure 4This is a cross-sectional view of an optical film according to another embodiment of the present invention.

[0035] Figure 5 This is a cross-sectional view of an optical film according to another embodiment of the present invention.

[0036] Figure 6 This is a cross-sectional view of an optical film according to another embodiment of the present invention.

[0037] Figure 7 This is a graph showing the spectrum of white display output after passing through an organic EL light source and a color filter in the example.

[0038] Figure 8 This is a graph showing the spectrum of each of red, green, and blue output after passing through an organic EL light source and a color filter in the example. DETAILED DESCRIPTION

[0039] Embodiments of the present invention will be described below with reference to the drawings. In all the drawings, even if the embodiments are different, the same or corresponding components are denoted by the same reference numerals, and the common description is omitted.

[0040] [Optical film]

[0041] The following is based on Figure 1 An optical film according to one embodiment of the present invention will be described in detail.

[0042] like Figure 1 As shown, the optical film 1 has a coloring layer 10, a transparent substrate 20, and a functional layer 30. The functional layer 30 has a low refractive index layer 31 and a hard coating layer 32. That is, the optical film 1 has a transparent substrate 20 located on one surface of the coloring layer 10, and is a laminated body in which the coloring layer 10, the transparent substrate 20, the hard coating layer 32, and the low refractive index layer 31 are laminated in sequence.

[0043] The thickness of the optical film 1 is, for example, preferably 10 to 140 μm, more preferably 15 to 120 μm, and still more preferably 20 to 100 μm. If the thickness of the optical film 1 is greater than or equal to the lower limit, the strength of the optical film 1 can be further improved. If the thickness of the optical film 1 is less than or equal to the upper limit, the optical film 1 can be made lighter and the display device can be thinner.

[0044] Each layer constituting the optical film 1 will be described below.

[0045] Coloring Layers

[0046] The colored layer 10 is a cured product of the colored layer-forming composition of the present invention. The colored layer-forming composition of the present invention contains a pigment (A), an active energy ray-curable resin (B), a photopolymerization initiator (C), a solvent (D), and an additive (E).

[0047] The thickness of the coloring layer 10 is preferably 0.5 to 10 μm, for example. If the thickness of the coloring layer 10 is greater than the lower limit, the coloring layer 10 can contain the pigment without causing abnormality in the appearance of the coloring layer 10, and the light absorption of the pigment can be used to improve the reflection characteristics and color reproducibility. If the thickness of the coloring layer 10 is less than the upper limit, it is conducive to thinning the display device.

[0048] The thickness of the colored layer 10 can be determined by observing a cross section in the thickness direction of the optical film 1 (a cross section viewed in a direction intersecting the thickness direction) using a microscope or the like.

[0049] <Pigment (A)>

[0050] The pigment (A) contains at least one of the first coloring material, the second coloring material, and the third coloring material shown below.

[0051] The maximum absorption wavelength of the first colorant is within the range of 470 to 530 nm and the half-value width of the absorption spectrum is 15 to 45 nm. If the maximum absorption wavelength is lower than the above lower limit, the brightness efficiency of the blue light emission is likely to decrease, and if it exceeds the above upper limit, the brightness efficiency of the green light emission is likely to decrease. If the half-value width of the absorption spectrum is lower than the above lower limit, the effect of suppressing the reflection characteristics of the external light is small, and if it exceeds the above upper limit, although the reflection characteristics of the external light are easily suppressed, the brightness efficiency is likely to decrease.

[0052] The maximum absorption wavelength of the second colorant is within the range of 560 to 620 nm and the half-value width of the absorption spectrum is 15 to 55 nm. If the maximum absorption wavelength is lower than the above lower limit, the brightness efficiency of green luminescence is likely to decrease, and if it exceeds the above upper limit, the brightness efficiency of red luminescence is likely to decrease. If the half-value width of the absorption spectrum is lower than the above lower limit, the effect of suppressing the reflection characteristics of external light is small, and if it exceeds the above upper limit, although the reflection characteristics of external light are easily suppressed, the brightness efficiency is likely to decrease.

[0053] The wavelength at which the third colorant has the lowest transmittance in the wavelength range of 380 to 780 nm is within the range of 650 to 780 nm. If the wavelength at which the third colorant has the lowest transmittance in the wavelength range of 380 to 780 nm is lower than the above lower limit, the brightness efficiency of red light emission is likely to decrease, and if it exceeds the above upper limit, the effect of suppressing the reflection characteristics of external light becomes smaller.

[0054] The pigment (A) preferably contains a compound having any structure of a porphyrin structure, a merocyanine structure, a phthalocyanine structure, an azo structure, a cyanine structure, a squaryl cyanine structure, a coumarin structure, a polyene structure, a quinone structure, a tetraazaporphyrin structure, a pyrromethene structure, or an indigo structure, or a metal complex thereof. That is, the pigment (A) preferably contains one or more compounds selected from a compound having any structure of a porphyrin structure, a merocyanine structure, a phthalocyanine structure, an azo structure, a cyanine structure, a squaryl cyanine structure, a coumarin structure, a polyene structure, a quinone structure, a tetraazaporphyrin structure, a pyrromethene structure, or an indigo structure, and a metal complex thereof.

[0055] Especially use the metal complex with porphyrin structure, pyrromethene structure, phthalocyanine structure or the compound with squarylium cyanine structure because reliability is excellent and more preferred. Pigment (A) can contain one in these compounds or its metal complex separately, also can contain more than two kinds.These compounds or its metal complex can be included in the first colorant, also can be included in the second colorant, also can be included in the 3rd colorant, also can be included in more than two kinds in these colorants.

[0056] <Active Energy Ray-Curable Resin (B)>

[0057] The active energy ray-curable resin (B) is a resin that is cured by polymerization by irradiation with active energy rays such as ultraviolet rays and electron beams. For example, monofunctional, bifunctional or trifunctional or higher (meth)acrylate monomers, urethane (meth)acrylates, etc. can be used, but the active energy ray-curable resin (B) of the present invention at least includes a resin having the ability to capture free radicals (free radical capture ability). Among them, "(meth)acrylate" refers to both or either of "acrylate" and "methacrylate".

[0058] As the resin having the ability to capture free radicals contained in the active energy ray-curable resin (B), a resin having an amine structure can be cited. Here, "amine structure" refers to a structure in which the hydrogen atom of ammonia is replaced by a hydrocarbon group or an aromatic atomic group. As the amine structure, primary amines, secondary amines, tertiary amines can be cited, and quaternary ammonium cations can also be cited.

[0059] The resin with free radical capture ability has the effect of capturing free radicals when the pigment (A) is oxidatively degraded and inhibiting auto-oxidation, thereby inhibiting pigment degradation (fading). As the resin with amine structure with free radical capture ability, a resin with a hindered amine structure having a molecular weight of more than 2000 can be cited. If the molecular weight of the resin with the hindered amine structure is more than 2000, a high fading inhibition effect can be obtained. It can be considered that this is because there are many molecules retained in the coloring layer 10, and a sufficient fading inhibition effect can be obtained.

[0060] The molecular weight of the resin having a hindered amine structure is, for example, about 200,000, but the upper limit is not particularly limited.

[0061] In this specification, "molecular weight" means the "weight average molecular weight" measured by gel permeation chromatography (GPC) using polystyrene as a standard substance.

[0062] In the present embodiment, the resin having an amine structure and having a radical-trapping capability includes a structural unit represented by the following formula (ii).

[0063] [Chemical formula 2]

[0064]

[0065] In the above formula (ii), R 12 R represents a hydrogen atom, a halogen atom, a carboxyl group, a sulfo group, a cyano group, a hydroxyl group, an alkyl group having 10 or less carbon atoms, an alkoxycarbonyl group having 10 or less carbon atoms, an alkylsulfonylaminocarbonyl group having 10 or less carbon atoms, an arylsulfonylaminocarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an acylaminosulfonyl group having 10 or less carbon atoms, an alkoxy group having 10 or less carbon atoms, an alkylthio group having 10 or less carbon atoms, an aryloxy group having 10 or less carbon atoms, a nitro group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an acyloxy group having 10 or less carbon atoms, an acyl group having 10 or less carbon atoms, a carbamoyl group, an aminosulfonyl group, an aryl group having 10 or less carbon atoms, a substituted amino group, a substituted ureido group, a substituted phosphono group, or a heterocyclic group. 13 represents a hydrogen atom or an alkyl group having 30 or less carbon atoms. X represents a single bond, an ester group, an aliphatic alkyl chain having 30 or less carbon atoms, an aromatic chain, a polyethylene glycol chain, or a connecting group composed of a combination thereof. 12 , R 13 and X may contain a spirodioxane ring.

[0066] R 12 Preferred are a hydrogen atom, a hydroxyl group, and an alkyl group having a carbon number of not more than 10. The alkyl group preferably has 1 to 6 carbon atoms, more preferably 1 to 3 carbon atoms.

[0067] R 13 Preferred are hydrogen atoms and alkyl groups having a carbon number of 10 or less. The alkyl group preferably has 1 to 6 carbon atoms, more preferably 1 to 3 carbon atoms.

[0068] X is preferably a single bond or an aliphatic alkyl chain having no greater than 30 carbon atoms. The aliphatic alkyl chain preferably has no greater than 10 carbon atoms, preferably 1 to 6 carbon atoms, and more preferably 2 to 4 carbon atoms.

[0069] In this embodiment, the resin having an amine structure and having free radical capture ability has a copolymer formed by a structural unit represented by the above formula (ii) and a copolymer component having any of the following repeating units as a main component (the largest mass % among the components). By being a copolymer, the compatibility with other components can be controlled.

[0070] Examples of the repeating unit include a (meth)acrylate repeating unit, an olefin repeating unit, a halogen atom-containing repeating unit, a styrene repeating unit, a vinyl acetate repeating unit, and a vinyl alcohol repeating unit.

[0071] Examples of the (meth)acrylate repeating unit include a repeating unit derived from a (meth)acrylate monomer having a linear or branched alkyl group in a side chain and a repeating unit derived from a (meth)acrylate monomer having a hydroxyl group in a side chain.

[0072] Examples of the repeating unit derived from a (meth)acrylate monomer having a linear or branched alkyl group in a side chain include components derived from monomers such as methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, isopropyl (meth)acrylate, butyl (meth)acrylate, isobutyl (meth)acrylate, sec-butyl (meth)acrylate, tert-butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, heptyl (meth)acrylate, octyl (meth)acrylate, isooctyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, nonyl (meth)acrylate, isononyl (meth)acrylate, decyl (meth)acrylate, isodecyl (meth)acrylate, undecyl (meth)acrylate, dodecyl (meth)acrylate, tridecyl (meth)acrylate, tetradecyl (meth)acrylate, myristyl (meth)acrylate, pentadecyl (meth)acrylate, hexadecyl (meth)acrylate, heptadecyl (meth)acrylate, and octadecyl (meth)acrylate. These may be used alone or in combination of two or more. Among the above, a (meth)acrylate-based repeating unit having a linear or branched alkyl group having 1 to 4 carbon atoms in a side chain may be preferably used.

[0073] Examples of the repeating unit derived from a (meth)acrylic acid monomer having a hydroxyl group in the side chain include components derived from monomers such as 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate, and hydroxyphenyl (meth)acrylate. These may be used alone or in combination of two or more.

[0074] Examples of the olefin-based repeating unit include components derived from olefin-based monomers such as ethylene, propylene, isoprene, and butadiene, and these may be used alone or in combination of two or more.

[0075] Examples of the halogen atom-containing repeating unit include components derived from monomers such as vinyl chloride and vinylidene chloride, which may be used alone or in combination of two or more.

[0076] Examples of the styrene-based repeating unit include components derived from styrene-based monomers such as styrene, α-methylstyrene, and vinyltoluene, and these may be used alone or in combination of two or more.

[0077] Examples of the vinyl acetate-based repeating unit include esters of saturated carboxylic acids such as vinyl acetate and vinyl propionate and vinyl alcohol, which may be used alone or in combination of two or more.

[0078] Examples of the vinyl alcohol-based repeating unit include vinyl alcohol, which may have a 1,2-glycol bond in a side chain.

[0079] The copolymer may have any structure among random copolymer, alternating copolymer, block copolymer and graft copolymer. If the structure of the copolymer is a random copolymer, the manufacturing process and the preparation with other components are easy. Therefore, random copolymer is more preferred than other copolymers.

[0080] The polymerization method for obtaining the copolymer can use free radical polymerization. From the viewpoint of easy industrial production, free radical polymerization is preferred. Free radical polymerization can be solution polymerization, emulsion polymerization, bulk polymerization, or suspension polymerization. In free radical polymerization, solution polymerization is preferably used. By using solution polymerization, the molecular weight of the copolymer can be easily controlled.

[0081] In the free radical polymerization, the above-mentioned monomers may be diluted with a polymerization solvent and then a polymerization initiator may be added to polymerize the monomers.

[0082] The polymerization solvent may be, for example, an ester solvent, an alcohol ether solvent, a ketone solvent, an aromatic solvent, an amide solvent, or an alcohol solvent. The ester solvent may be, for example, methyl acetate, ethyl acetate, n-butyl acetate, isobutyl acetate, tert-butyl acetate, methyl lactate, or ethyl lactate. The alcohol ether solvent may be, for example, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether, 3-methoxy-1-butanol, or 3-methoxy-3-methyl-1-butanol. The ketone solvent may be, for example, acetone, methyl ethyl ketone, methyl isobutyl ketone, or cyclohexanone. The aromatic solvent may be, for example, benzene, toluene, or xylene. The amide solvent may be, for example, formamide, or dimethylformamide. The alcohol solvent may be, for example, methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, primary butanol, tert-butanol, diacetone alcohol, or 2-methyl-2-butanol, etc. It should be noted that the above-mentioned polymerization solvent may be used alone or in combination of two or more.

[0083] The free radical polymerization initiator may be, for example, a peroxide or an azo compound. The peroxide may be, for example, benzoyl peroxide, tert-butyl peroxyacetate, tert-butyl peroxybenzoate, or di-tert-butyl peroxide. The azo compound may be, for example, azobisisobutyronitrile, azobisamidinopropane salt, azobiscyanovaleric acid (salt), or 2,2'-azobis[2-methyl-N-(2-hydroxyethyl)propionamide], or the like.

[0084] When the total amount of monomers is set to 100 parts by mass, the amount of the radical polymerization initiator is preferably 0.0001 parts by mass or more and 20 parts by mass or less, more preferably 0.001 parts by mass or more and 15 parts by mass or less, and further preferably 0.005 parts by mass or more and 10 parts by mass or less. The radical polymerization initiator can be added to the monomer and the polymerization solvent before polymerization initiation, or can be added dropwise to the polymerization reaction system. From the aspect of being able to suppress the heat generated by polymerization, the radical polymerization initiator is preferably added dropwise to the polymerization reaction system relative to the monomer and the polymerization solvent.

[0085] The reaction temperature of the radical polymerization is appropriately selected according to the types of the radical polymerization initiator and the polymerization solvent. From the viewpoint of ease of production and reaction controllability, the reaction temperature is preferably 60° C. or higher and 110° C. or lower.

[0086] When the resin having an amine structure having a radical scavenging ability is a polymer containing a structural unit represented by formula (ii), the content of the structural unit represented by formula (ii) is preferably 1 to 95 mol%, more preferably 10 to 90 mol%, relative to the total molar amount of the monomers constituting the active energy ray-curable resin (B). When the content of the structural unit represented by formula (ii) is within the above numerical range, the light resistance and heat resistance of the pigment (A) are improved, and fading is easily suppressed.

[0087] Examples of the monofunctional (meth)acrylate compound that can be contained in the active energy ray-curable resin (B) include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate, glycidyl (meth)acrylate, acryloylmorpholine, N-vinyl pyrrolidone, tetrahydrofurfuryl acrylate, cyclohexyl (meth)acrylate, 2-hydroxypropyl ... Ethylhexyl (meth)acrylate, isobornyl (meth)acrylate, isodecyl (meth)acrylate, lauryl (meth)acrylate, tridecyl (meth)acrylate, hexadecyl (meth)acrylate, stearyl (meth)acrylate, benzyl (meth)acrylate, 2-ethoxyethyl (meth)acrylate, 3-methoxybutyl (meth)acrylate, ethyl carbitol (meth)acrylate, phosphoric acid (meth)acrylate, ethylene oxide modified phosphoric acid (meth)acrylate, phenoxy (meth)acrylate, ethylene oxide modified phenoxy (meth)acrylate Acid ester, propylene oxide modified phenoxy (meth) acrylate, nonylphenol (meth) acrylate, ethylene oxide modified nonylphenol (meth) acrylate, propylene oxide modified nonylphenol (meth) acrylate, methoxydiethylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, methoxypropylene glycol (meth) acrylate, 2-(meth)acryloyloxyethyl-2-hydroxypropyl phthalate, (meth) acrylate-2-hydroxy-3-phenoxypropyl, phthalic acid mono-2-(meth)acryloyloxyethyl , mono-2-(meth)acryloxypropyl phthalate, mono-2-(meth)acryloxypropyl hexahydrophthalate, mono-2-(meth)acryloxypropyl tetrahydrophthalate, dimethylaminoethyl (meth)acrylate, trifluoroethyl (meth)acrylate, tetrafluoropropyl (meth)acrylate, hexafluoropropyl (meth)acrylate, octafluoropropyl (meth)acrylate, adamantane derivative mono(meth)acrylate such as adamantane acrylate having a monovalent mono(meth)acrylate derived from 2-adamantane or adamantanediol, etc. Here, "(meth)acryloyl" refers to both or either "acryloyl" and "methacryloyl".

[0088] Examples of the bifunctional (meth)acrylate compound that can be contained in the active energy ray-curable resin (B) include ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, butylene glycol di(meth)acrylate, hexanediol di(meth)acrylate, nonanediol di(meth)acrylate, ethoxylated hexanediol di(meth)acrylate, propoxylated hexanediol di(meth)acrylate, diethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, polypropylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, ethoxylated neopentyl glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, di(meth)acrylates such as hydroxypivalate neopentyl glycol di(meth)acrylate, and the like.

[0089] Examples of trifunctional or higher-functional (meth)acrylate compounds that can be contained in the active energy ray-curable resin (B) include tri(meth)acrylates such as trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate, tri(2-hydroxyethyl)isocyanurate tri(meth)acrylate, and glycerol tri(meth)acrylate; pentaerythritol tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, and di(trimethylolpropane tri(meth)acrylate. ) ester; polyfunctional (meth)acrylate compounds having three or more functions such as pentaerythritol tetra(meth)acrylate, di(trimethylolpropane) tetra(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, di(trimethylolpropane) penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and di(trimethylolpropane) hexa(meth)acrylate; polyfunctional (meth)acrylate compounds in which a part of these (meth)acrylates is substituted with alkyl groups or ε-caprolactone, etc.

[0090] In addition, as a resin that can be included in the active energy ray-curable resin (B), urethane (meth) acrylate can also be used. As the urethane (meth) acrylate, for example, urethane (meth) acrylates can be exemplified by reacting a (meth) acrylate monomer having a hydroxyl group with a product obtained by reacting an isocyanate monomer or a prepolymer with a polyester polyol.

[0091] Examples of urethane (meth)acrylates include pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer, dipentaerythritol pentaacrylate hexamethylene diisocyanate urethane prepolymer, pentaerythritol triacrylate toluene diisocyanate urethane prepolymer, dipentaerythritol pentaacrylate toluene diisocyanate urethane prepolymer, pentaerythritol triacrylate isophorone diisocyanate urethane prepolymer, and dipentaerythritol pentaacrylate isophorone diisocyanate urethane prepolymer.

[0092] The above-mentioned other monofunctional, difunctional or trifunctional or higher (meth)acrylate monomers, urethane (meth)acrylates, etc. that can be contained in the active energy ray-curable resin (B) may be used alone or in combination of two or more. In addition, they may be partially polymerized oligomers.

[0093] The content of the active energy ray curable resin (B) is preferably 20 to 80% by mass, more preferably 30 to 70% by mass relative to the total mass of the coloring layer forming composition. If the content of the active energy ray curable resin (B) is above the above lower limit, the fading inhibition effect can be further improved. If the content of the active energy ray curable resin (B) is below the above upper limit, the handling property of the coloring layer forming composition can be further improved.

[0094] <Photopolymerization Initiator (C)>

[0095] The photopolymerization initiator (C) is a photopolymerization initiator that generates radicals when irradiated with ultraviolet rays, for example, when ultraviolet rays are used as active energy rays.

[0096] Examples of the photopolymerization initiator (C) include benzoins (benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether and other benzoin alkyl ethers); phenyl ketones [e.g. acetophenones (e.g. acetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 1,1-dichloroacetophenone, etc.), alkyl phenyl ketones such as 2-hydroxy-2-methylpropiophenone, cycloalkyl phenyl ketones such as 1-hydroxycyclohexyl phenyl ketone, etc.]; aminoacetophenones {2-methyl-1-[4-(methylthio)-1-

[0043] In some embodiments, the photopolymerization initiator includes anthraquinone (anthraquinone, 2-methylanthraquinone, 2-ethylanthraquinone, 2-tert-butylanthraquinone, 1-chloroanthraquinone, etc.); thioxanthones (2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2-chlorothioxanthone, 2,4-diisopropylthioxanthone, etc.); ketals (acetophenone dimethyl ketal, benzyl dimethyl ketal, etc.); benzophenones (benzophenone, etc.); xanthones; phosphine oxides (for example, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, etc.). These photopolymerization initiators may be used alone or in combination of two or more.

[0097] The content of the photopolymerization initiator (C) is preferably 0.01 to 20% by mass, more preferably 0.01 to 5% by mass, relative to the total mass of the solid content of the coloring layer forming composition. If the content of the photopolymerization initiator (C) is less than the above lower limit, the curability is insufficient. If the content of the photopolymerization initiator (C) exceeds the above upper limit, unreacted photopolymerization initiator (C) remains, and reliability such as heat resistance deteriorates.

[0098] <Solvent (D)>

[0099] Examples of the solvent (D) include ethers, ketones, esters, and cellosolves. Examples of the ethers include dibutyl ether, dimethoxymethane, dimethoxyethane, diethoxyethane, propylene oxide, 1,4-dioxane, 1,3-dioxolane, 1,3,5-trioxane, tetrahydrofuran, anisole, or phenethyl ether. Examples of the ketones include acetone, methyl ethyl ketone, diethyl ketone, diacetone, diisobutyl ketone, methyl isobutyl ketone, cyclopentanone, cyclohexanone, methylcyclohexanone, or ethylcyclohexanone. Examples of the esters include ethyl formate, propyl formate, n-pentyl formate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate, n-pentyl acetate, or γ-butyrolactone. Examples of the cellosolves include methyl cellosolve, cellosolve (ethyl cellosolve), butyl cellosolve, and cellosolve acetate, etc. The solvent (D) may be used alone or in combination of two or more.

[0100] The content of the solvent (D) is preferably 20 to 80% by mass, more preferably 30 to 70% by mass, relative to the total mass of the composition for forming a colored layer. If the content of the solvent (D) is above the lower limit, the handling properties of the composition for forming a colored layer can be further improved. If the content of the solvent (D) is below the upper limit, the time for forming a colored layer can be shortened.

[0101] <Additives (E)>

[0102] The additive (E) contains at least a compound having a structure represented by the following formula (i) (hereinafter referred to as "compound A") and a sulfur-based antioxidant.

[0103] [Chemical formula 3]

[0104]

[0105] In formula (i), R 1 Each independently represents an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, R 9 CO-、R 10 SO2-, and R 11 Any of the groups represented by NHCO- 9 , R 10 , R 11 are each independently any one of an alkyl group, an alkenyl group, an aryl group, and a heterocyclic group). 2 and R 3 Each R is independently any one of a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group, and an alkenyloxy group. 4 ~R 8 Each is independently any one of a hydrogen atom, an alkyl group, an alkenyl group, and an aryl group.

[0106] Examples of the sulfur-based antioxidant include dialkyl dithiophosphates, dialkyl dithiocarbamates, benzenedithiol, and transition metal complexes thereof.

[0107] The inventors have found that by mixing the compound A and the sulfur-based antioxidant in a predetermined ratio in a colored layer-forming composition, the light resistance and heat resistance of the dye (A) can be significantly improved.

[0108] The predetermined ratio is such that the mass of the compound A is set to be in the range of 0.01 to 2, when the mass of the sulfur-based antioxidant is set to 1. That is, the predetermined ratio is such that the content of the compound A is 0.01 to 2, when the content of the sulfur-based antioxidant in the colored layer-forming composition is set to 1.

[0109] The additive (E) may contain a leveling agent, a defoaming agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a photosensitizer, a conductive material, and the like as other additives.

[0110] The total mass of compound A and sulfur-based antioxidant in the additive (E) is preferably 0.1 to 15% by mass, more preferably 0.1 to 10% by mass, relative to the total mass of the solid content of the coloring layer-forming composition. If the content is less than the above lower limit, the fading inhibition effect of the light resistance and heat resistance of the pigment (A) is not exhibited. If the content of the additive (E) exceeds the above upper limit, curing hindrance caused by the additive (E) or insufficient curing due to a reduction in the curing component is likely to occur.

[0111] The colored layer 10 contains the colored layer-forming composition of the present invention, and can improve light resistance and heat resistance without requiring a gas barrier layer, can achieve both reflection suppression and brightness efficiency, can improve display quality, can extend the life of the light-emitting element, and can improve color reproducibility.

[0112] 《Transparent substrate》

[0113] The transparent substrate 20 is located on one surface of the colored layer 10 and is a sheet-like member that forms the optical film 1 .

[0114] As the material of the transparent substrate 20, a resin film with light transmittance can be used. As the material for forming the transparent substrate 20, a transparent resin or inorganic glass can be used. As the transparent resin, for example, polyolefin, polyester, polyacrylate, polyamide, polyimide, polyarylate, polycarbonate, triacetyl cellulose, polyvinyl alcohol, polyvinyl chloride, cycloolefin copolymer, norbornene-containing resin, polyether sulfone, polysulfone, etc. can be listed. As the polyolefin, for example, polyethylene, polypropylene, etc. can be listed. As the polyester, for example, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc. can be listed. As the polyacrylate, for example, polymethyl methacrylate, etc. can be listed. As the polyamide, for example, nylon 6, nylon 66, etc. can be listed. Among them, it is preferred to use a film formed by polyethylene terephthalate (PET), a film formed by triacetyl cellulose (TAC), a film formed by polymethyl methacrylate (PMMA), and a film formed by polyester other than PET.

[0115] The thickness of the transparent substrate 20 is not particularly limited, but is preferably, for example, 10 to 100 μm.

[0116] The transmittance of the transparent base material 20 is preferably, for example, 90% or more.

[0117] Ultraviolet absorption capability can be imparted to the transparent substrate 20. Ultraviolet absorption capability can be imparted to the transparent substrate 20 by adding an ultraviolet absorber to the resin as the raw material of the transparent substrate 20.

[0118] Examples of the ultraviolet absorber include salicylate ultraviolet absorbers, benzophenone ultraviolet absorbers, benzotriazole ultraviolet absorbers, benzotriazine ultraviolet absorbers, and cyanoacrylate ultraviolet absorbers.

[0119] These ultraviolet absorbers may be used alone or in combination of two or more.

[0120] When ultraviolet absorbing capability is imparted to the transparent substrate 20, the ultraviolet shielding rate is preferably 85% or more. The ultraviolet shielding rate is a value measured in accordance with JIS L1925 and is calculated by the following formula.

[0121] Ultraviolet shielding rate (%) = 100 - average transmittance of ultraviolet rays with a wavelength of 290 to 400 nm (%)

[0122] When the ultraviolet shielding rate is less than 85%, the effect of suppressing fading due to the light resistance of the dye (A) becomes low.

[0123] Functional Layer

[0124] The functional layer 30 is located on one surface or the other surface of the colored layer 10. The optical film can exhibit various functions by including the functional layer 30.

[0125] Examples of the function of the functional layer 30 include an antireflection function, an antiglare function, an antistatic function, an antifouling function, a reinforcing function, and an ultraviolet absorption function (ultraviolet absorption capability).

[0126] The functional layer 30 may be a single layer or a multi-layer layer. The functional layer 30 may have one function or two or more functions.

[0127] When the optical film 1 has an anti-reflection function, the functional layer 30 functions as an anti-reflection layer. As the anti-reflection layer, a low refractive index layer 31 having a lower refractive index than the hard coating layer 32, the anti-glare layer 34, and the transparent substrate 20 described later can be cited. The low refractive index layer 31 can be formed by using a material having a lower refractive index than the hard coating layer 32, the anti-glare layer 34, and the transparent substrate 20 in the functional layer.

[0128] In order to adjust the refractive index of the low refractive index layer 31, lithium fluoride (LiF), magnesium fluoride (MgF2), sodium aluminum hexafluoride (cryolite, 3NaF·AlF3, Na3AlF6), aluminum fluoride (AlF3) and other particles, silica particles and the like can be mixed. As silica particles, silica particles having voids inside the particles such as porous silica particles and hollow silica particles are used, which is effective for lowering the refractive index of the low refractive index layer 31. In addition, the photopolymerization initiator (C), solvent (D), and additive (E) described in the colored layer 10 can be appropriately mixed in the composition for forming the low refractive index layer 31 (composition for forming the low refractive index layer).

[0129] The refractive index of the low refractive index layer 31 is preferably set to 1.20 to 1.55.

[0130] The thickness of the low refractive index layer 31 is not particularly limited, but is preferably, for example, 40 nm to 1 μm.

[0131] When the optical film 1 has an anti-glare function, the functional layer 30 functions as an anti-glare layer 34. The anti-glare layer 34 has fine concavoconvexities on the surface, scatters external light through the concavoconvexities, suppresses reflection, and improves display quality. When combined with the low refractive index layer 31, the low refractive index layer 31 and the anti-glare layer 34 constitute an anti-reflection layer.

[0132] As required, the anti-glare layer 34 includes more than one selected from organic particles and inorganic particles. Organic particles are materials that form fine concavo-convex on the surface and impart the function of scattering external light. As organic particles, for example, resin particles formed by light-transmitting resin materials such as acrylic resin, polystyrene resin, styrene-(methyl)acrylate copolymer, polyethylene resin, epoxy resin, silicone resin, polyvinylidene fluoride, polyvinyl fluoride resin can be listed. In order to adjust the dispersibility of the refractive index and the resin particles, two or more resin particles with different materials (refractive index) can be mixed and used.

[0133] Inorganic particles are materials used to adjust the sedimentation and aggregation of organic particles. As inorganic particles, for example, silica particles, metal oxide particles, various mineral particles, etc. can be used. As silica particles, for example, colloidal silica, silica particles surface-modified with reactive functional groups such as (meth) acryloyl groups, etc. can be used. As metal oxide particles, for example, aluminum oxide, zinc oxide, tin oxide, antimony oxide, indium oxide, titanium dioxide, zirconium dioxide, etc. can be used. As mineral particles, for example, mica, synthetic mica, vermiculite, montmorillonite, iron montmorillonite, bentonite, beidellite, saponite, hectorite, stevenstone, nontronite, magadiite, illite, nadzinite, layered titanic acid, smectite, synthetic smectite, etc. can be used. Mineral particles can be either natural or synthetic (including substitutions and derivatives), or a mixture of the two can be used. Among mineral particles, layered organic clay is more preferred. Layered organic clay refers to clay with organic onium ions introduced between the layers of swelling clay. There is no particular limitation on the organic onium ions as long as they are ions that can be organically formed by utilizing the cation exchangeability of the swelling clay. When layered organic clay minerals are used as mineral particles, the above-mentioned synthetic montmorillonite is preferably used. Synthetic montmorillonite has the function of increasing the viscosity of the coating solution used to form the anti-glare layer, inhibiting the sedimentation of resin particles and inorganic particles, and thus adjusting the concavo-convex shape of the surface of the anti-glare layer 34 (functional layer 30).

[0134] When the optical film 1 has an antistatic function, the functional layer 30 functions as an antistatic layer. Examples of the antistatic layer include a layer containing antistatic agents such as antimony-doped tin oxide (ATO) and tin-doped indium oxide (ITO), etc., a polymer conductive composition, and a quaternary ammonium salt.

[0135] The antistatic layer may be provided on the outermost surface of the functional layer 30 or between the functional layer 30 and the transparent substrate 20. Alternatively, the antistatic layer may be formed by adding an antistatic agent to any layer constituting the functional layer 30. When the antistatic layer is provided, the surface resistance of the optical film is preferably 1.0×10 6 ~1.0×10 12 (Ω / cm).

[0136] When the optical film 1 has an antifouling function, the functional layer 30 functions as an antifouling layer. The antifouling layer is a layer that improves the antifouling property by imparting both or either hydrophobicity and oleophobicity. Examples of the antifouling layer include layers containing antifouling agents such as silicon oxides, fluorine-containing silane compounds, fluoroalkyl silazanes, fluoroalkyl silanes, fluorine-containing silicon compounds, and silane coupling agents containing perfluoropolyether groups.

[0137] The antifouling layer may be provided on the outermost surface of the functional layer 30 , or may be formed by mixing an antifouling agent into the outermost layer of the functional layer 30 .

[0138] When the optical film 1 has a strengthening function, the functional layer 30 functions as a strengthening layer. The strengthening layer is a layer that improves the strength of the optical film. As the strengthening layer, for example, a hard coating layer 32 can be cited. As the hard coating layer 32, for example, a layer formed by a hard coating agent containing a monofunctional, bifunctional, or trifunctional or higher (meth) acrylate, or urethane (meth) acrylate can be cited.

[0139] When the optical film 1 has ultraviolet absorption capability, the functional layer 30 functions as an ultraviolet absorption layer. As the ultraviolet absorption layer, for example, a layer containing a triazine-based ultraviolet absorber such as 2-(4,6-diphenyl-1,3,5-triazine-2-yl)-5-hexyloxyphenol or a benzotriazole-based ultraviolet absorber such as 2-(2H-benzotriazole-2-yl)-4-methylphenol can be cited.

[0140] The content of the ultraviolet absorber is preferably 0.1 to 5% by mass relative to the total mass of the material forming the ultraviolet absorbing layer. If the content of the ultraviolet absorber is greater than the above lower limit, sufficient ultraviolet absorbing ability can be imparted to the functional layer 30. If the content of the ultraviolet absorber is less than the above upper limit, insufficient hardness due to a decrease in the curing component can be avoided.

[0141] In the optical film 1, the ultraviolet shielding rate of one or both of the transparent substrate 20 and the functional layer 30 is 85% or more, preferably 90% or more, more preferably 95% or more, and may be 100%. If the ultraviolet shielding rate is equal to or greater than the above lower limit, light resistance and heat resistance can be further improved.

[0142] The ultraviolet shielding rate can be measured according to the method described in JIS L1925.

[0143] The ultraviolet shielding rate can be adjusted by imparting ultraviolet absorption capability to one or both of the transparent substrate 20 and the functional layer 30 .

[0144] The thickness of the functional layer 30 is preferably 0.04 to 25 μm, more preferably 0.1 to 20 μm, and further preferably 0.2 to 15 μm. If the thickness of the functional layer 30 is greater than the lower limit, it is easy to impart various functions to the optical film 1. If the thickness of the functional layer 30 is less than the upper limit, it is advantageous for thinning the display device.

[0145] [Method for producing optical film]

[0146] The optical film 1 of the present embodiment can be produced by a conventionally known method.

[0147] For example, the colored layer 10 is obtained by applying a colored layer-forming composition on one surface of the transparent substrate 20 and curing the colored layer-forming composition by irradiating the surface with active energy rays.

[0148] The light source used for irradiating active energy rays to cure the coloring layer forming composition and form the coloring layer 10 can be used without limitation as long as it is a light source that generates active energy rays. As active energy rays, light energy rays such as radiation (gamma rays, X-rays, etc.), ultraviolet rays, visible light, electron rays (EB), etc. can be used, and usually ultraviolet rays and electron rays are mostly used. For example, low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, carbon arc lamps, metal halide lamps, xenon lamps, electrodeless discharge tubes, etc. can be used as lamps that radiate ultraviolet rays. As irradiation conditions, the ultraviolet irradiation amount is usually 100 to 1000 mJ / cm 2 .

[0149] Next, a hard coating agent is applied to the other surface of the transparent substrate 20 and irradiated with the same active energy rays as the colored layer 10 to cure the hard coating agent, thereby obtaining the hard coating layer 32 .

[0150] By forming the low refractive index layer 31 on the hard coat layer 32 , the optical film 1 in which the functional layer 30 is located on the other surface of the transparent substrate 20 is obtained.

[0151] The method for forming the low refractive index layer 31 is not limited, and a method of applying a low refractive index layer forming composition on the hard coat layer 32 and curing it by irradiating it with active energy rays, vacuum evaporation, sputtering, ion plating, ion beam method, plasma vapor phase growth method, etc. can be used.

[0152] [Other embodiments]

[0153] Optical films can also be used Figure 2 As shown, the optical film 3 includes a transparent substrate 20 on one surface of a colored layer 10, and is formed by laminating the colored layer 10, the transparent substrate 20, and the anti-glare layer 34 in this order. In the optical film 3, the anti-glare layer 34 constitutes the functional layer 30.

[0154] The optical film 3 of the present embodiment has the anti-glare layer 34 and therefore has excellent suppression of reflection.

[0155] Optical films can also be Figure 3 As shown, the optical film 4 has a transparent substrate 20 on one surface of the colored layer 10, and is formed by sequentially stacking the colored layer 10, the transparent substrate 20, the anti-glare layer 34, and the low refractive index layer 31. In the optical film 4, the anti-glare layer 34 and the low refractive index layer 31 constitute the functional layer 30.

[0156] The optical film 4 of the present embodiment has the low refractive index layer 31 and the anti-glare layer 34 and therefore is more excellent in suppressing reflection.

[0157] Optical films can also be Figure 4 As shown, the optical film 5 includes a transparent substrate 20 located on one surface of a coloring layer 10 and a functional layer 30 located on the other surface of the coloring layer 10, and is formed by sequentially stacking the transparent substrate 20, the coloring layer 10, the hard coating layer 32, and the low refractive index layer 31. In the optical film 5, the hard coating layer 32 and the low refractive index layer 31 constitute the functional layer 30.

[0158] The optical film 5 of this embodiment has a colored layer 10 and a functional layer 30 having an ultraviolet absorption function and an antireflection function on one surface of a transparent substrate 20. The ultraviolet absorption function may be imparted to any layer constituting the functional layer.

[0159] Optical films can also be Figure 5 As shown, the optical film 7 includes a transparent substrate 20 on one side of a coloring layer 10 and an antiglare layer 34 on the other side of the coloring layer 10. The transparent substrate 20, the coloring layer 10, and the antiglare layer 34 are sequentially stacked. In the optical film 7, the antiglare layer 34 constitutes the functional layer 30.

[0160] The optical film 7 of the present embodiment has the anti-glare layer 34 and therefore has excellent suppression of reflection.

[0161] In the optical film 7 , it is preferable that the anti-glare layer 34 be provided with an ultraviolet absorbing function.

[0162] Optical films can also be Figure 6 As shown, the optical film 8 has a transparent substrate 20 located on one surface of the coloring layer 10 and a functional layer 30 located on the other surface of the coloring layer 10, and is formed by sequentially stacking the transparent substrate 20, the coloring layer 10, the anti-glare layer 34, and the low refractive index layer 31. In the optical film 8, the anti-glare layer 34 and the low refractive index layer 31 constitute the functional layer 30.

[0163] The optical film 8 of the present embodiment has the low refractive index layer 31 and the anti-glare layer 34 and therefore is more excellent in suppressing reflection.

[0164] In the optical film 8 , it is preferred that an ultraviolet absorbing function be imparted to any of the layers constituting the functional layer 30 .

[0165] [Display device]

[0166] The display device of the present invention is provided with the optical film of the present invention. As a specific example of the display device, for example, a television, a display, a mobile phone, a portable game console, a portable information terminal, a personal computer, an electronic book, a video camera, a digital camera, a head-mounted display, a navigation system, an audio playback device (car audio, digital audio player, etc.), a copier, a fax machine, a printer, a printer compound machine, a vending machine, an automatic teller machine (ATM), a personal authentication device, an optical communication device, an IC card, etc., can be cited. Among them, it is preferably used in a display device having self-luminous elements such as LED, organic EL, inorganic phosphor, quantum dots, etc., which are easily affected by external light reflection due to metal electrodes and wiring.

[0167] According to the optical film of each embodiment described above, since it has a colored layer containing the colored layer-forming composition of the present invention, it is possible to improve light resistance and heat resistance without providing a gas barrier layer, and it is possible to achieve both reflection suppression and brightness efficiency. Therefore, a display device having the optical film of this embodiment can improve display quality and extend the life of the light-emitting element.

[0168] Although the embodiments of the present invention have been described in detail with reference to the drawings, specific technical solutions are not limited to the embodiments and include changes and combinations of technical solutions within the scope of the present invention.

[0169] For example, although the number of colored layers in each of the above-mentioned optical films is one, the number of colored layers may be two or more.

[0170] In the optical film of each embodiment, ultraviolet absorption capability may be imparted to the transparent substrate 20 or to the functional layer 30 such as the hard coat layer 32. It is important to impart ultraviolet absorption capability to a layer closer to the screen viewed by the user than the colored layer 10 when mounted in a display device.

[0171] Example

[0172] The present invention is further described in detail using the following examples. The technical scope of the present invention is not limited in any way based on the specific contents of these examples.

[0173] [Examples 1 to 8, Comparative Examples 1 to 6]

[0174] In the following examples and comparative examples, optical films A to N having the layer structures shown in Tables 1 and 2 were prepared. The optical film properties and display device properties in organic EL panels of the prepared optical films A to N were evaluated by simulation. In the table, "-" means that the layer is not present.

[0175]

[0176]

[0177] 《Production of optical films》

[0178] The method of forming each layer will be described below.

[0179] [Formation of Colored Layer]

[0180] (Materials used in the coloring layer forming composition)

[0181] As materials used for the coloring layer-forming composition used for forming the coloring layer, the following materials were used.

[0182] It should be noted that the maximum absorption wavelength, half-value width, and minimum transmittance wavelength in a predetermined wavelength range of the colorant are characteristic values ​​in the form of a cured coating film.

[0183] <Pigment (A)>

[0184] First color

[0185] Dye-1: Pyrromethene cobalt complex dye (maximum absorption wavelength 493nm, half value width 26nm)

[0186] <Production Example of Dye-1>

[0187] 5-Formyl-2,4-dimethyl-1H-pyrrole-3-carboxylic acid ethyl ester (2.5 g) was placed in a reaction container and dissolved in methanol (50 mL). Then, 47% hydrobromic acid (45 g) was added and refluxed for 1 hour. The precipitated solid was filtered to obtain 3,3',5,5'-tetramethyl-4,4'-bis(ethoxycarbonyl)-2,2'-dipyrromethene hydrobromide (2.6 g).

[0188] 3,3',5,5'-tetramethyl-4,4'-bis(ethoxycarbonyl)-2,2'-dipyrromethene hydrobromide (0.6 g) was placed in a reaction vessel, methanol (5 mL), triethylamine (0.17 g), and cobalt acetate tetrahydrate (0.18 g) were added, and the mixture was refluxed for 2 hours. The precipitated solid was filtered to obtain dye-1 (0.42 g).

[0189] Second color

[0190] Dye-2: Porphyrazine copper complex dye (manufactured by Yamada Chemical Industry Co., Ltd., FDG-007, maximum absorption wavelength of 595 nm, half-value width of 22 nm)

[0191] Dye-3: Porphyrazine copper complex dye (manufactured by Yamamoto Chemical Co., Ltd., PD-311S, maximum absorption wavelength of 586 nm, half-value width of 22 nm)

[0192] ·Third color material

[0193] Dye-4: Copper phthalocyanine complex dye (manufactured by Yamada Chemical Industry Co., Ltd., FDN-002, minimum transmittance wavelength in the range of 400 to 780 nm is 780 nm)

[0194] <Active Energy Ray-Curable Resin (B)>

[0195] Resin 1: A polymer containing a structural unit represented by the above formula (ii)

[0196] UA-306H: Pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer (manufactured by Kyoeisha Chemical Co., Ltd., UA-306H)

[0197] DPHA: Dipentaerythritol hexaacrylate

[0198] PETA: Pentaerythritol triacrylate

[0199] <Production Example of Resin 1>

[0200] 2.4 g of 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate (manufactured by Showa Denko Materials Co., Ltd., FA-711MM), 5.6 g of methyl methacrylate (manufactured by Kanto Chemical Co., Ltd.), 31 g of cyclohexanone (manufactured by Kanto Chemical Co., Ltd.), and 0.11 g of 2,2'-azobis(isobutyronitrile) (manufactured by FUJIFILM Wako Pure Chemical Corporation) were placed in a reaction container, and heated and stirred at 70°C for 8 hours in a nitrogen atmosphere. Then, a polymer solution was obtained by heating and stirring at 100°C for 1 hour. The polymer solution was poured into 400 mL of methanol (manufactured by Kanto Chemical Co., Ltd.), and the generated precipitate was filtered and dried to obtain a resin 1 copolymerized with 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate:methyl methacrylate=15:85 [mol%].

[0201] By additionally performing heating and stirring at 100° C. for 1 hour, the initiator 2,2′-azobis(isobutyronitrile) can be completely decomposed, and deterioration of the optical film due to the residual initiator can be suppressed.

[0202] Furthermore, by injecting the polymer solution into methanol, unreacted monomers, polymerization solvent, decomposition products of the initiator, and the like can be removed, and degradation of the optical film can be suppressed.

[0203] <Photopolymerization Initiator (C)>

[0204] Omnirad TPO: acylphosphine oxide-based photopolymerization initiator (manufactured by IGM Resins BV)

[0205] <Solvent (D)>

[0206] MEK: Methyl Ethyl Ketone

[0207] Methyl acetate

[0208] <Additives (E)>

[0209] Compound A: T1477

[0210] R 1 :C3H7,R 2 ~R 8 :H

[0211] Sulfur-based antioxidant: Nickel(II) bis(dibutyldithiocarbamate) (D1781 manufactured by Tokyo Chemical Industry Co., Ltd.)

[0212] Tinuvin 479: Hydroxyphenyltriazine-based ultraviolet absorber, Tinuvin (registered trademark) 479 (manufactured by BASF Japan Ltd.)

[0213] LA-36: Benzotriazole-based ultraviolet absorber, ADK stab (registered trademark) LA-36 (manufactured by ADEKA Corporation)

[0214] (Transparent substrate)

[0215] As the transparent substrate, the following were used.

[0216] ·TAC: triacetyl cellulose film (manufactured by FUJIFILM Corporation, TG60UL, substrate thickness 60 μm, ultraviolet shielding rate 92.9%)

[0217] PMMA: polymethyl methacrylate film (manufactured by Sumitomo Chemical Co., Ltd., W002N80, substrate thickness 80 μm, UV shielding rate 13.9%)

[0218] (Formation of Colored Layer)

[0219] The coloring layer-forming composition shown in Table 3 was applied to the transparent substrates shown in Table 1 and Table 2, and dried in an oven at 80° C. for 60 seconds. Thereafter, an ultraviolet irradiation device was used to irradiate the transparent substrates at a dose of 150 mJ / cm 2 The coating film was cured by irradiating with ultraviolet rays (manufactured by Fusion UV Systems Japan KK; the light source was an H bulb), and a colored layer was formed so that the film thickness after curing was 5.0 μm.

[0220] In addition, the addition amount is a mass ratio (mass %). In the table, "-" means that the component is not contained.

[0221]

[0222] [Formation of functional layer: hard coat layer]

[0223] (Materials used in the hard coat layer forming composition)

[0224] As materials used for the hard coat layer-forming composition used for forming the hard coat layer, the following materials were used.

[0225] Active energy ray curable resin

[0226] UA-306H: Pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer (manufactured by Kyoeisha Chemical Co., Ltd., UA-306H)

[0227] DPHA: Dipentaerythritol hexaacrylate

[0228] PETA: Pentaerythritol triacrylate

[0229] Photopolymerization initiator

[0230] Omnirad TPO: acylphosphine oxide-based photopolymerization initiator (manufactured by IGM Resins BV)

[0231] ·Additives (ultraviolet (UV) absorbers)

[0232] Tinuvin 479: Hydroxyphenyltriazine-based ultraviolet absorber, Tinuvin (registered trademark) 479 (manufactured by BASF Japan Ltd.)

[0233] LA-36: Benzotriazole-based ultraviolet absorber, ADK stab (registered trademark) LA-36 (manufactured by ADEKA Corporation)

[0234] Solvent

[0235] MEK: Methyl Ethyl Ketone

[0236] Methyl acetate

[0237] (Formation of hard coat layer)

[0238] The hard coat layer-forming composition shown in Table 4 was applied onto the transparent substrate or the colored layer shown in Table 1 or Table 2, and dried in an oven at 80°C for 60 seconds. Thereafter, an ultraviolet irradiation device was used to irradiate the substrate at a dose of 150 mJ / cm 2The coating was cured by ultraviolet irradiation (manufactured by Fusion UVSystems Japan KK, with an H bulb as the light source) to form a hard coating layer with a film thickness of 5.0 μm after curing. It should be noted that the addition amount is a mass ratio (mass %). In the table, "-" means that the component is not contained.

[0239] Table 4

[0240]

[0241] [Formation of functional layer: anti-glare layer]

[0242] (Anti-glare layer forming composition)

[0243] As the anti-glare layer-forming composition used for forming the anti-glare layer, the following can be used.

[0244] Active energy ray curable resin

[0245] Pentaerythritol triacrylate, Light Acrylate PE-3A (manufactured by Kyoeisha Chemical Co., Ltd., refractive index 1.52) 43.7 parts by mass

[0246] Photopolymerization initiator

[0247] Omnirad TPO(IGM Resin s 4.55 parts by mass of resin particles

[0248] Styrene-methyl methacrylate copolymer particles (refractive index: 1.515, average particle size: 2.0 μm) 0.5 parts by mass

[0249] Inorganic particles

[0250] 0.25 mass parts of synthetic montmorillonite

[0251] Alumina nanoparticles (average particle size 40 nm) 1.0 mass part

[0252] Solvent

[0253] Toluene 15 parts by mass

[0254] Isopropyl alcohol 35 parts by mass

[0255] (Formation of Anti-glare Layer)

[0256] The anti-glare layer-forming composition was applied onto the transparent substrate shown in Table 1 and dried in an oven at 80° C. for 60 seconds. 2The coating film was cured by irradiating with ultraviolet rays (manufactured by Fusion UV Systems Japan KK; the light source was an H bulb), and an antiglare layer was formed so that the film thickness after curing was 5.0 μm.

[0257] [Formation of functional layer: low refractive index layer]

[0258] (Composition for forming low refractive index layer)

[0259] As the low refractive index layer-forming composition used for forming the low refractive index layer, the following was used.

[0260] Refractive index modifier

[0261] 8.5 parts by mass of porous silica fine particles (average particle size 75 nm, solid content 20%) methyl isobutyl ketone dispersion

[0262] Antifouling agent

[0263] OPTOOL (registered trademark) AR-110 (manufactured by Daikin Industries, Ltd., solid content: 15%, solvent: methyl isobutyl ketone) 5.6 parts by mass

[0264] Active energy ray curable resin

[0265] Pentaerythritol triacrylate (PETA) 0.4 parts by mass

[0266] Photopolymerization initiator

[0267] Omnirad TPO (manufactured by IGM Resins BV) 0.07 parts by mass

[0268] Leveling agent

[0269] RS-77 (manufactured by DIC Corporation) 1.7 parts by mass

[0270] Solvent

[0271] Methyl isobutyl ketone 83.73 parts by mass

[0272] (Formation of Low Refractive Index Layer)

[0273] The above-mentioned low refractive index layer-forming composition was applied on the hard coat layer or antiglare layer shown in Table 1 or Table 2, and dried in an oven at 80° C. for 60 seconds. Thereafter, an ultraviolet irradiation device was used to irradiate the hard coat layer or antiglare layer at a dose of 200 mJ / cm 2 The coating film was cured by irradiating with ultraviolet rays (manufactured by Fusion UV Systems Japan KK; the light source was an H bulb), and a low refractive index layer was formed so that the thickness of the cured film was 100 nm.

[0274] [Evaluation of film properties]

[0275] <Ultraviolet shielding rate on the colored layer>

[0276] When the layer above the colored layer is a transparent substrate, the transmittance of the substrate is measured using an automatic spectrophotometer (manufactured by Hitachi, Ltd., U-4100). In addition, when the colored layer is a layer above the substrate, the layer above the colored layer is peeled off using a transparent pressure-sensitive tape in accordance with the adhesion test of JIS-K5600-5-6:1999, and the transmittance of the layer above the colored layer is measured using an automatic spectrophotometer (manufactured by Hitachi, Ltd., U-4100) with the tape as a reference. The average transmittance [%] in the ultraviolet region (290nm to 400nm) is calculated using these transmittances, and the value obtained by subtracting the average transmittance [%] in the ultraviolet region (290nm to 400nm) from 100% is calculated as the ultraviolet shielding rate [%].

[0277] <Light resistance test>

[0278] The obtained optical film was subjected to a light resistance test using a xenon lamp weathering tester (manufactured by Suga Test Instruments Co., Ltd., X75) at a xenon lamp illumination of 60 W / m 2 The test was conducted for 120 hours under the conditions of (300nm~400nm), 45℃ and 50%RH in the test machine. The transmittance was measured before and after the test using an automatic spectrophotometer (U-4100 manufactured by Hitachi, Ltd.). The transmittance difference ΔTλ1 before and after the test at the wavelength λ1 showing the minimum transmittance before the test in the wavelength range of 470nm~530nm and the transmittance difference ΔTλ2 before and after the test at the wavelength λ2 showing the minimum transmittance before the test in the wavelength range of 560nm~620nm were calculated. The transmittance difference is good when it is close to zero, preferably |ΔTλN|≤20 (N=1~3), and more preferably |ΔTλN|≤10 (N=1~3).

[0279] <Heat resistance test>

[0280] As a heat resistance test of the obtained optical film, the test was conducted at 90°C for 500 hours, and the transmittance was measured before and after the test using an automatic spectrophotometer (manufactured by Hitachi, Ltd., U-4100), and the transmittance difference ΔTλ1 before and after the test at the wavelength λ1 showing the minimum transmittance before the test in the wavelength range of 470nm to 530nm, and the transmittance difference ΔTλ2 before and after the test at the wavelength λ2 showing the minimum transmittance before the test in the wavelength range of 560nm to 620nm were calculated. The transmittance difference is good when it is close to zero, preferably |ΔTλN|≤20 (N=1 to 3), and more preferably |ΔTλN|≤10 (N=1 to 3).

[0281] [Display device characteristics evaluation]

[0282] <White Display Transmission Characteristics>

[0283] The transmittance of the obtained optical film was measured using an automatic spectrophotometer (manufactured by Hitachi, Ltd., U-4100), and the efficiency of light passing through the optical film during white display was calculated using the transmittance, which was evaluated as the white display transmission characteristics. Figure 7 The efficiency of the spectrum shown in the white display output after passing through the white organic EL light source and the color filter is 100. The closer to 100, the higher the white display transmittance is, and the better the luminance efficiency is.

[0284] <Reflection Characteristics of Display Device>

[0285] The transmittance T(λ) and surface reflectance R2(λ) of the obtained optical film were measured using an automatic spectrophotometer (manufactured by Hitachi, Ltd., U-4100). For the measurement of the surface reflectance R2(λ), a matte black dye was applied to the surface of the transparent substrate where no coloring layer and functional layer were formed for anti-reflection treatment, and the spectral reflectance at an incident angle of 5° was measured as the surface reflectance R2(λ). The electrode reflectance R2(λ) at a wavelength of 380nm to 780nm was taken as the surface reflectance R2(λ). E (λ) are all set to 100%, and the interface reflection and surface reflection of each layer are not considered. The relative reflection value when the reflection value of the display device to the D65 light source (CIE (International Illumination Commission) standard light source D65) in the state without an optical film is set to 100 is calculated based on the following formulas (1) to (4), and the surface reflectivity R(λ) of the outermost layer on the observer side is evaluated as the reflection characteristic of the display device. The lower the value of the reflection characteristic of the display device, the more it can reduce the reflection of external light, and the better the reflection characteristic. It should be noted that in formulas (1) to (4), R1(λ) represents the internal reflection component, Y represents one of the three stimulus values ​​in the white point of the D65 light source, and P D65 (λ) represents the spectrum of D65 light source, and y(λ) represents the CIE1931 color matching function.

[0286] [Mathematical formula 1]

[0287]

[0288] [Mathematical formula 2]

[0289] R(λ)[%]=R1(λ)+R2(λ)(2)

[0290] [Mathematical formula 3]

[0291]

[0292] [Formula 4]

[0293]

[0294] <Color Reproducibility>

[0295] The transmittance of the obtained optical film was measured using an automatic spectrophotometer (U-4100, manufactured by Hitachi, Ltd.) Figure 7 The spectrum shown is the output after passing through a white EL light source and a color filter. Figure 8 Spectrum of red display, green display, and blue display. Figure 7 as well as Figure 8 The vertical axis of the graph represents the luminous intensity [au] (arbitrary unit). Figure 8 The NTSC (National Television System Committee) ratio is calculated from the CIE1931 chromaticity values ​​calculated from the red, green, and blue display spectra, and the NTSC ratio is used as an indicator of color reproducibility for evaluation. The higher the NTSC ratio, the better the color reproducibility.

[0296] As the evaluation of optical film properties, the results of the ultraviolet shielding rate on the coloring layer, the light resistance test, and the heat resistance test are shown in Tables 5 and 6. As the evaluation of display device properties, the results of the white display transmission property, the display device reflection property, and the color reproducibility are shown in Tables 5 and 6. It should be noted that the comparative example 6 using the optical film M without a coloring layer did not perform the measurement of the ultraviolet shielding rate on the coloring layer, the light resistance test, and the heat resistance test, and therefore is indicated by "-" in Table 6. In addition, the ratio of the white display transmission property based on the white display transmission property in the comparative example 6 (compared with the comparative example 6) and the ratio of the display device reflection property based on the display device reflection property in the comparative example 6 (compared with the comparative example 6) are shown in Tables 5 and 6, respectively.

[0297]

[0298]

[0299] From the results of Example 2 and Comparative Example 1, it is understood that the addition of compound A and a sulfur-based antioxidant can reduce the discoloration of the colored layer.

[0300] From the results of Example 2 and Comparative Examples 2 to 3, it is understood that the effect of reducing discoloration is insufficient only by using Compound A and a sulfur-based antioxidant.

[0301] From the results of Examples 2 and 4, it is understood that the effect of alleviating discoloration is further enhanced by adding a polymer containing a structural unit represented by the above formula (ii).

[0302] From the results of Examples 4 and 5 and Comparative Example 4, it is understood that a good effect of reducing discoloration can be obtained by setting the ratio of Compound A to the sulfur-based antioxidant within a predetermined range.

[0303] From the results of Example 4 and Comparative Examples 2 and 3, it is understood that the effect of reducing discoloration is insufficient only by using Compound A and a sulfur-based antioxidant.

[0304] From the results of Examples 6 and 7, it is understood that even when the functional layer includes an anti-glare layer, the same effect of reducing fading can be obtained.

[0305] From the results of Example 8, it is understood that even when the ultraviolet absorbing layer on the colored layer is not a transparent substrate, the same effect of reducing fading can be obtained.

[0306] From the results of Example 8 and Comparative Example 5, it can be seen that even if an ultraviolet absorbing material is mixed on the coloring layer, a sufficient fading reduction effect cannot be obtained, and a good fading reduction effect can only be obtained when an ultraviolet absorbing layer exists on the coloring layer.

[0307] Compared with the display device of Comparative Example 6 without a coloring layer, the display devices of each embodiment of the present invention with a coloring layer significantly reduced surface reflection. In addition, when a circular polarizer is used, the transmittance is greatly reduced, and the display devices of each embodiment also have excellent brightness efficiency and further improved color reproducibility as shown by the evaluation value of white display transmittance.

[0308] Examples 1, 2, and 3 were optically designed for absorption in one wavelength, absorption in two wavelengths, and absorption in two wavelengths and near-infrared regions, respectively. The results showed that the more absorption regions there were, the better the reflection characteristics were.

[0309] An embodiment and examples of the present invention have been described in detail above, but the present invention is not limited to the specific embodiments and includes changes and combinations of technical solutions that do not depart from the scope of the idea of ​​the present invention.

[0310] Possibility of industrial application

[0311] The present invention can be used for a composition for forming a colored layer that can form a colored layer that can withstand long-term use without requiring a gas barrier layer.

[0312] Furthermore, the present invention can be used for an optical film and a display device that can maintain high display quality even when used for a long period of time without requiring a gas barrier layer.

[0313] Explanation of symbols

[0314] 1, 3, 4, 5, 7, 8 optical film

[0315] 10 Coloring Layer

[0316] 20 Transparent substrate

[0317] 30 functional layers

[0318] 31 Low refractive index layer

[0319] 32 Hard coating

[0320] 34 Anti-glare layer

Claims

1. A coloring layer-forming composition comprising a pigment (A), an active energy ray-curable resin (B), a photopolymerization initiator (C), a solvent (D), and an additive (E), The pigment (A) contains at least one of a first colorant, a second colorant, and a third colorant, The maximum absorption wavelength of the first colorant is in the range of 470 to 530 nm and the half-value width of the absorption spectrum is in the range of 15 to 45 nm. The maximum absorption wavelength of the second colorant is in the range of 560 to 620 nm and the half-value width of the absorption spectrum is 15 to 55 nm. The wavelength with the lowest transmittance of the third colorant in the wavelength range of 380 to 780 nm is in the range of 650 to 780 nm. The additive (E) comprises a compound A represented by the following formula (i) and a sulfur-based antioxidant, When the content of the sulfur-based antioxidant is set to 1, the content of the compound A is 0.01 to 2. [Chemical formula 1] In the formula (i), R 1 are independently alkyl, alkenyl, aryl, heterocyclic, R 9 CO-、R 10 SO2-, and R 11 Any of the groups represented by NHCO-, wherein, R 9 , R 10 , R 11 Each is independently any one of an alkyl group, an alkenyl group, an aryl group, and a heterocyclic group; R 2 and R 3 are each independently any one of a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group, and an alkenyloxy group; R 4 ~R 8 Each is independently any one of a hydrogen atom, an alkyl group, an alkenyl group, and an aryl group.

2. The composition for forming a colored layer according to claim 1, wherein The sulfur-based antioxidant is any one of dialkyl dithiophosphates, dialkyl dithiocarbamates, benzenedithiol, and transition metal complexes thereof.

3. The composition for forming a colored layer according to claim 1, wherein The active energy ray-curable resin (B) is a polymer containing a structural unit represented by the following formula (ii), [Chemical formula 2] In formula (ii), R 12 represents a hydrogen atom, a halogen atom, a carboxyl group, a sulfo group, a cyano group, a hydroxyl group, an alkyl group having 10 or less carbon atoms, an alkoxycarbonyl group having 10 or less carbon atoms, an alkylsulfonylaminocarbonyl group having 10 or less carbon atoms, an arylsulfonylaminocarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an acylaminosulfonyl group having 10 or less carbon atoms, an alkoxy group having 10 or less carbon atoms, an alkylthio group having 10 or less carbon atoms, an aryloxy group having 10 or less carbon atoms, a nitro group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an acyloxy group having 10 or less carbon atoms, an acyl group having 10 or less carbon atoms, a carbamoyl group, an aminosulfonyl group, an aryl group having 10 or less carbon atoms, a substituted amino group, a substituted ureido group, a substituted phosphono group, or a heterocyclic group; R 13 represents a hydrogen atom or an alkyl group having 30 or less carbon atoms; X represents a single bond, an ester group, an aliphatic alkyl chain having 30 or less carbon atoms, an aromatic chain, a polyethylene glycol chain, or a connecting group formed by combining these; R 12 , R 13 and X may contain a spirodioxane ring.

4. The composition for forming a colored layer according to claim 1, wherein The pigment (A) comprises one or more compounds selected from compounds having any one of a porphyrin structure, a merocyanine structure, a phthalocyanine structure, an azo structure, a cyanine structure, a squarylium structure, a coumarin structure, a polyene structure, a quinone structure, a tetraazaporphyrin structure, a pyrromethene structure and an indigo structure, and metal complexes thereof.

5. An optical film comprising: A colored layer, which is a cured product of the colored layer-forming composition according to any one of claims 1 to 4; a transparent substrate located on one side of the colored layer; and A functional layer located on one side or the other side of the coloring layer; in, The ultraviolet shielding rate of one or both of the transparent substrate and the functional layer measured according to the method described in JIS L1925 is 85% or more, The functional layer functions as an antireflection layer or an antiglare layer. 6 . The optical film according to claim 5 , further comprising an antistatic layer or an antifouling layer as the functional layer. 7 . A display device comprising the optical film according to claim 5 .

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