JP2023033878A - Coloring layer-forming composition, optical film, and display device - Google Patents

Abstract

To provide a coloring layer-forming composition, optical film, and display device, which offer both improved color purity and luminance efficiency and enhanced display quality.SOLUTION: A coloring layer-forming composition is provided, comprising a pigment (A), additive (B), active energy ray-curable resin (C), photopolymerization initiator (D), and solvent (E), the pigment (A) containing a first colorant containing a dipyrromethene boron complex having a specific structure.SELECTED DRAWING: None

Description

TECHNICAL FIELD The present invention relates to a composition for forming a colored layer, an optical film and a display device.

2. Description of the Related Art In display devices such as liquid crystal displays (LCDs) and white organic ELs (white OLEDs), there is an increasing demand for improved image quality including color reproducibility. For example, in LCDs, color reproducibility depends on color purity, and color purity is greatly influenced by backlight light source and color filter characteristics. Known methods for improving color purity include, for example, a method of color separation using a color filter for a white light source of a display device, and a method of correcting a monochromatic light source with a color filter to narrow the half-value width.

However, in order to improve the color purity with a color filter, it is necessary to increase the concentration of the coloring material or increase the film thickness of the color filter. If the concentration of the coloring material is increased, the photolithographic properties (exposure properties) are deteriorated.
In addition, a color filter with improved color purity has a low transmittance and has a problem of lowering luminance efficiency.

An OLED display device composed of pixels emitting light in three colors, RGB, basically does not require a color filter, but a color filter is used when it is desired to further improve the color purity, causing the same problems as LCDs. .

To address this problem, for example, Patent Document 1 proposes a color correction filter containing a first colorant having a specific structure and a second colorant having an absorption maximum in the wavelength range of 420 to 480 nm. ing. According to the invention of Patent Document 1, a color correction filter is used to improve the color purity of a white light source. Patent Literature 2 proposes a display filter having a resin layer containing a dipyrromethene dye, the resin being a polyester resin having a specific glass transition temperature. According to the invention of Patent Document 2, the use of a dipyrromethene complex having a small half width as a dye having an absorption peak between green and blue emissions effectively improves color purity.

Japanese Patent No. 6142398 JP 2006-251076 A

Among dipyrromethene complexes, a compound whose central element is boron has a smaller absorption half width than a compound whose central element is a metal element, and it is easy to achieve both an improvement in color purity and an improvement in luminance efficiency.
However, the dipyrromethene complex used in the prior art emits strong fluorescence, so that it emits light when it is excited by external light even when the power is turned off. Therefore, it is not suitable as a dye for use in display devices.

Accordingly, an object of the present invention is to provide a composition for forming a colored layer, an optical film, and a display device that can improve color purity and luminance efficiency, achieve both color purity and luminance efficiency, and improve display quality.

The present invention has the following aspects.

［式（Ｉ）において、Ｒ^１～Ｒ^１１は、各々独立に一価基を表し、Ｒ^２とＲ^３及びＲ^４とＲ^５の双方又はいずれか一方は、それぞれ互いに結合してピロール環に縮合する芳香環を形成してもよく、該芳香環は、置換基を有していてもよく、また、これらによって形成される縮合芳香環は、同一であっても異なるものであってもよく、Ｒ^７～Ｒ^１１のうち、少なくとも一つは電子吸引性を有する一価基を有し、Ｙはホウ素と結合する基を表し、複数あるＹは、同一であってもよく異なるものであってもよく、互いに結合して環を形成していてもよい。］
［２］前記第一の色材の吸収極大波長が４７０～５３０ｎｍの範囲内にあり、吸光スペクトルの半値幅が１５～３０ｎｍである、［１］に記載の着色層形成用組成物。
［３］前記色素（Ａ）が、吸収極大波長が５６０～６２０ｎｍの範囲内にあり、吸光スペクトルの半値幅が１５～５５ｎｍである第二の色材をさらに含有する、［１］又は［２］に記載の着色層形成用組成物。
［４］前記色素（Ａ）が、４００～７８０ｎｍの波長範囲において最も透過率の低い波長が６５０～７８０ｎｍの範囲内にある第三の色材をさらに含有する、［１］～［３］のいずれかに記載の着色層形成用組成物。
［５］前記色素（Ａ）が、ポルフィリン構造、メロシアニン構造、フタロシアニン構造、アゾ構造、シアニン構造、スクアリリウム構造、クマリン構造、ポリエン構造、キノン構造、テトラジポルフィリン構造、ピロメテン構造及びインジゴ構造のいずれかを有する化合物並びにその金属錯体からなる群から選択される１種以上の化合物を含む、［１］～［４］のいずれかに記載の着色層形成用組成物。 [1] Containing a dye (A), an additive (B), an active energy ray-curable resin (C), a photopolymerization initiator (D), and a solvent (E), the dye (A ) contains a first coloring material, and the first coloring material contains a dipyrromethene boron complex having a structure represented by the following formula (I).

[In formula (I), R ¹ to R ¹¹ each independently represent a monovalent group, and both or either one of R ² and R ³ and R ⁴ and R ⁵ are bonded to each other to form a pyrrole ring; A condensed aromatic ring may be formed, the aromatic ring may have a substituent, and the condensed aromatic rings formed by these may be the same or different. , R ⁷ to R ¹¹ , at least one has an electron-withdrawing monovalent group, Y represents a group that binds to boron, and a plurality of Y may be the same or different. may be combined with each other to form a ring. ]
[2] The composition for forming a colored layer according to [1], wherein the first coloring material has a maximum absorption wavelength in the range of 470 to 530 nm and a half width of the absorption spectrum of 15 to 30 nm.
[3] The dye (A) further contains a second coloring material having a maximum absorption wavelength in the range of 560 to 620 nm and a half width of the absorption spectrum of 15 to 55 nm, [1] or [2 ] The composition for colored layer formation as described in .
[4] of [1] to [3], wherein the dye (A) further contains a third coloring material having the lowest transmittance wavelength in the range of 650 to 780 nm in the wavelength range of 400 to 780 nm. The composition for forming a colored layer according to any one of the above.
[5] The dye (A) has 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 tetradiporphyrin structure, a pyrromethene structure and an indigo structure. The composition for forming a colored layer according to any one of [1] to [4], comprising one or more compounds selected from the group consisting of compounds having and metal complexes thereof.

[6] A colored layer that is a cured product of the colored layer-forming composition according to any one of [1] to [5], a transparent substrate located on one side of the colored layer, and the colored layer and a functional layer located on one or the other surface, wherein one or both of the transparent substrate and the functional layer has an ultraviolet shielding rate of 85% or more measured according to the method described in JIS L1925. An optical film, wherein the functional layer functions as an antireflection layer or an antiglare layer.
[7] The optical film of [6], further comprising, as the functional layer, an oxygen barrier layer having an oxygen permeability of 10 cm ³ /(m ² ·day·atm) or less.
[8] The optical film of [6] or [7], further comprising an antistatic layer or an antifouling layer as the functional layer.

[9] A display device comprising the optical film according to any one of [6] to [8].

ADVANTAGE OF THE INVENTION According to the composition for forming a colored layer of this invention, color purity and luminance efficiency can be improved, both color purity and luminance efficiency can be achieved, and display quality can be improved.

1 is a cross-sectional view of an optical film according to one embodiment of the present invention; FIG. FIG. 4 is a cross-sectional view of an optical film according to another embodiment of the invention; FIG. 4 is a cross-sectional view of an optical film according to another embodiment of the invention; FIG. 4 is a cross-sectional view of an optical film according to another embodiment of the invention; FIG. 4 is a cross-sectional view of an optical film according to another embodiment of the invention; FIG. 4 is a cross-sectional view of an optical film according to another embodiment of the invention; FIG. 4 is a cross-sectional view of an optical film according to another embodiment of the invention; FIG. 4 is a cross-sectional view of an optical film according to another embodiment of the invention; 4 is a graph of each spectrum during red display, green display, and blue display output through the organic EL display in the example.

[Optical film]
An optical film according to one embodiment of the present invention will be described in detail below with reference to FIG.

As shown in FIG. 1, the optical film 1 has a colored layer 10, a transparent substrate 20, and a functional layer 30. As shown in FIG. The functional layer 30 has a low refractive index layer 31 and a hard coat layer 32 . That is, the optical film 1 has a transparent substrate 20 located on one side of the colored layer 10, and the colored layer 10, the transparent substrate 20, the hard coat layer 32, and the low refractive index layer 31 are laminated in this order. It is a laminated body.

The thickness of the optical film 1 is, for example, preferably 10 to 140 μm, more preferably 15 to 120 μm, even more preferably 20 to 100 μm. The intensity|strength of the optical film 1 can be improved more as the thickness of the optical film 1 is more than the said lower limit. When the thickness of the optical film 1 is equal to or less than the above upper limit, the optical film 1 can be made lighter, which is advantageous for thinning the display device.
Each layer constituting the optical film 1 will be described below.

≪Colored layer≫
The colored layer 10 is a cured product of the colored layer-forming composition of the present invention. The composition for forming a colored layer of the present invention comprises a dye (A), an additive (B), an active energy ray-curable resin (C), a photopolymerization initiator (D), a solvent (E), contains

The thickness of the colored layer 10 is preferably 0.5 to 10 μm, for example. Color purity can be improved as the thickness of the colored layer 10 is more than the said lower limit, and both color purity and luminance efficiency can be compatible. When the thickness of the colored layer 10 is equal to or less than the above upper limit, it is advantageous for thinning the display device.
The thickness of the colored layer 10 is obtained by observing a cross section of the optical film 1 in the thickness direction with a microscope or the like.

<Dye (A)>
Pigment (A) contains a first coloring material. The first colorant contains a dipyrromethene boron complex. Examples of the dipyrromethene boron complex include compounds having a structure represented by the following formula (I).

In formula (I), R ¹ to R ¹¹ each independently represent a monovalent group. Both or either one of R ² and R ³ and R ⁴ and R ⁵ may be combined with each other to form an aromatic ring condensed to the pyrrole ring. The aromatic ring may have a substituent, and the condensed aromatic rings formed by these may be the same or different. At least one of R ⁷ to R ¹¹ has an electron-withdrawing monovalent group. Y represents a group that bonds with boron. A plurality of Y may be the same or different. Y may combine with each other to form a ring.

In formula (I), R ¹ to R ¹¹ each independently represent a monovalent group. When the monovalent group has carbon atoms, the number of carbon atoms is preferably 1-30, more preferably 1-20, even more preferably 1-10. When the number of carbon atoms is at least the above lower limit, various substituents can be introduced into the dipyrromethene boron complex. Dispersibility can be improved as carbon number is below the said upper limit. Moreover, when a monovalent group has a carbon atom, the monovalent group may have a substituent.
Monovalent groups include, for example, a hydrogen atom, a halogen atom, a nitro group, a cyano group, a hydroxy group, an amino group, a carboxyl group, a sulfonic acid group, an alkyl group, an alkoxy group, an alkenyl group, an aryloxy group, an acyl group, and an alkoxy group. carbonyl group, alkylaminocarbonyl group, dialkylaminocarbonyl group, alkylcarbonylamino group, arylcarbonylamino group, arylaminocarbonyl group, aryloxycarbonyl group, aralkyl group, aryl group, heteroaryl group, alkylthio group, arylthio group, alkenyl Examples include an oxycarbonyl group and an aralkyloxycarbonyl group.
Halogen atoms include fluorine, chlorine, bromine and iodine.
Alkyl groups include methyl group, ethyl group, n-propyl group, iso-propyl group, n-butyl group, iso-butyl group, sec-butyl group, t-butyl group, n-pentyl group and iso-pentyl group. , 2-methylbutyl group, 1-methylbutyl group, neo-pentyl group, 1,2-dimethylpropyl group, 1,1-dimethylpropyl group, cyclo-pentyl group, n-hexyl group, 4-methylpentyl group, 3- methylpentyl group, 2-methylpentyl group, 1-methylpentyl group, 3,3-dimethylbutyl group, 2,3-dimethylbutyl group, 1,3-dimethylbutyl group, 2,2-dimethylbutyl group, 1, 2-dimethylbutyl group, 1,1-dimethylbutyl group, 3-ethylbutyl group, 2-ethylbutyl group, 1-ethylbutyl group, 1,2,2-trimethylbutyl group, 1,1,2-trimethylbutyl group, 1 -ethyl-2-methylpropyl group, cyclo-hexyl group, n-heptyl group, 2-methylhexyl group, 3-methylhexyl group, 4-methylhexyl group, 5-methylhexyl group, 2,4-dimethylpentyl group , n-octyl group, 2-ethylhexyl group, 2,5-dimethylhexyl group, 2,5,5-trimethylpentyl group, 2,4-dimethylhexyl group, 2,2,4-trimethylpentyl group, n-octyl group, 3,5,5-trimethylhexyl group, n-nonyl group, n-decyl group, 4-ethyloctyl group, 4-ethyl-4,5-methylhexyl group, n-undecyl group, n-dodecyl group, 1,3,5,7-tetraethyloctyl group, 4-butyloctyl group, 6,6-diethyloctyl group, n-tridecyl group, 6-methyl-4-butyloctyl group, n-tetradecyl group, n-pentadecyl group , 3,5-dimethylheptyl group, 2,6-dimethylheptyl group, 2,4-dimethylheptyl group, 2,2,5,5-tetramethylhexyl group, 1-cyclo-pentyl-2,2-dimethylpropyl group, 1-cyclo-hexyl-2,2-dimethylpropyl group, and the like.
These alkyl groups preferably have 1 to 20 carbon atoms, more preferably 1 to 10 carbon atoms. These alkyl groups may be linear, branched, or cyclic. Also, one or more hydrogen atoms of these alkyl groups may be substituted with a halogen atom or an alkoxy group.

Alkoxy groups include methoxy, ethoxy, n-propoxy, iso-propoxy, n-butoxy, iso-butoxy, sec-butoxy, t-butoxy, n-pentoxy and iso-pentoxy groups. , neo-pentoxy group, n-hexyloxy group, n-dodecyloxy group and the like.
These alkoxy groups preferably have 1 to 20 carbon atoms, more preferably 1 to 10 carbon atoms. These alkoxy groups may be linear or branched.
Examples of alkenyl groups include vinyl, propenyl, 1-butenyl, iso-butenyl, 1-pentenyl, 2-pentenyl, 2-methyl-1-butenyl, 3-methyl-1-butenyl, 2 -methyl-2-butenyl group, 2,2-dicyanovinyl group, 2-cyano-2-methylcarboxyvinyl group, 2-cyano-2-methylsulfonevinyl group and the like.
These alkenyl groups preferably have 2 to 20 carbon atoms, more preferably 2 to 10 carbon atoms. These alkenyl groups may be linear or branched.

The aryloxy group includes phenoxy group, 2-methylphenoxy group, 4-methylphenoxy group, 4-t-butylphenoxy group, 2-methoxyphenoxy group, 4-iso-propylphenoxy group and the like.
These aryloxy groups preferably have 6 to 20 carbon atoms.
Acyl groups include formyl, acetyl, ethylcarbonyl, n-propylcarbonyl, iso-propylcarbonyl, n-butylcarbonyl, iso-butylcarbonyl, sec-butylcarbonyl and t-butylcarbonyl groups. , n-pentylcarbonyl group, iso-pentylcarbonyl group, neo-pentylcarbonyl group, 2-methylbutylcarbonyl group, nitrobenzylcarbonyl group and the like.
These acyl groups preferably have 1 to 20 carbon atoms, more preferably 1 to 10 carbon atoms.
Alkoxycarbonyl groups include methoxycarbonyl, ethoxycarbonyl, isopropyloxycarbonyl and 2,4-dimethylbutyloxycarbonyl groups.
The alkylaminocarbonyl group includes methylaminocarbonyl, ethylaminocarbonyl, n-propylaminocarbonyl, n-butylaminocarbonyl, n-hexylaminocarbonyl and the like.
These alkylaminocarbonyl groups preferably have 2 to 20 carbon atoms, more preferably 2 to 10 carbon atoms.

The dialkylaminocarbonyl group includes dimethylaminocarbonyl, diethylaminocarbonyl, di-n-propylaminocarbonyl, di-n-butylaminocarbonyl, N-methyl-N-cyclohexylaminocarbonyl and the like.
These dialkylaminocarbonyl groups preferably have 3 to 20 carbon atoms, more preferably 3 to 10 carbon atoms.
An acetylamino group, an ethylcarbonylamino group, a butylcarbonylamino group etc. are mentioned as an alkylcarbonylamino group.
These alkylcarbonylamino groups preferably have 2 to 20 carbon atoms, more preferably 2 to 10 carbon atoms.
The arylcarbonylamino group includes a phenylaminocarbonyl group, a 4-methylphenylaminocarbonyl group, a 2-methoxyphenylaminocarbonyl group, a 4-n-propylphenylaminocarbonyl group and the like.
These arylcarbonylamino groups preferably have 7 to 20 carbon atoms.
The arylaminocarbonyl group includes phenylcarbonylamino group, 4-ethylphenylcarbonylamino group, 3-butylphenylcarbonylamino group and the like.
These arylaminocarbonyl groups preferably have 7 to 20 carbon atoms.

Aralkyl groups include benzyl, nitrobenzyl, cyanobenzyl, hydroxybenzyl, methylbenzyl, dimethylbenzyl, trimethylbenzyl, dichlorobenzyl, methoxybenzyl, ethoxybenzyl, trifluoromethylbenzyl, Naphthylmethyl group, nitronaphthylmethyl group, cyanonaphthylmethyl group, hydroxynaphthylmethyl group, methylnaphthylmethyl group, trifluoromethylnaphthylmethyl group and the like.
These aralkyl groups preferably have 7 to 20 carbon atoms.
Aryl groups include phenyl, nitrophenyl, cyanophenyl, hydroxyphenyl, methylphenyl, dimethylphenyl, trimethylphenyl, dichlorophenyl, methoxyphenyl, ethoxyphenyl, trifluoromethylphenyl, N , N-dimethylaminophenyl group, naphthyl group, nitronaphthyl group, cyanonaphthyl group, hydroxynaphthyl group, methylnaphthyl group, trifluoromethylnaphthyl group and the like.
These aryl groups preferably have 6 to 20 carbon atoms, more preferably 6 to 10 carbon atoms.
Heteroaryl groups include pyrrolyl, thienyl, furanyl, oxazoyl, isoxazoyl, oxadiazoyl, imidazoyl, benzoxazolyl, benzothiazolyl, benzimidazolyl, benzofuranyl, and indoyl groups. be done.
These heteroaryl groups preferably have 4 to 20 carbon atoms, more preferably 4 to 10 carbon atoms.

Alkylthio groups include methylthio, ethylthio, n-propylthio, iso-propylthio, n-butylthio, iso-butylthio, sec-butylthio, t-butylthio, n-pentylthio and iso-pentylthio groups. , 2-methylbutylthio group, 1-methylbutylthio group, neo-pentylthio group, 1,2-dimethylpropylthio group, 1,1-dimethylpropylthio group and the like.
These alkylthio groups preferably have 1 to 20 carbon atoms, more preferably 1 to 10 carbon atoms.
The arylthio group includes a phenylthio group, a 4-methylphenylthio group, a 2-methoxyphenylthio group, a 4-t-butylphenylthio group and the like.
These arylthio groups preferably have 6 to 20 carbon atoms.
The alkenyloxycarbonyl group includes an allyloxycarbonyl group, a 2-butenoxycarbonyl group and the like.
These alkenyloxycarbonyl groups preferably have 3 to 20 carbon atoms, more preferably 3 to 10 carbon atoms.
The aralkyloxycarbonyl group includes a benzyloxycarbonyl group, a phenethyloxycarbonyl group and the like.
These aralkyloxycarbonyl groups preferably have 8 to 20 carbon atoms.

In formula (I), both or one of R ² and R ³ and R ⁴ and R ⁵ may each combine to form an aromatic ring condensed to the pyrrole ring. The newly formed aromatic ring may have a substituent. The number of carbon atoms in the newly formed aromatic ring is preferably 6-30, more preferably 6-20, even more preferably 6-10. When the number of carbon atoms in the newly formed aromatic ring is at least the above lower limit, a dipyrromethene boron complex with a stable structure can be obtained. When the number of carbon atoms in the newly formed aromatic ring is equal to or less than the above upper limit, dispersibility can be improved. The newly formed aromatic rings (fused aromatic rings) may be the same or different.
A benzene ring is preferable as the newly formed aromatic ring. The newly formed aromatic ring may have the substituents described above as monovalent groups.

At least one of R ⁷ to R ¹¹ in formula (I) has an electron-withdrawing monovalent group. When at least one of R ⁷ to R ¹¹ in formula (I) has an electron-withdrawing monovalent group, fluorescence can be suppressed and display quality can be improved. Among the display qualities, the display quality for black (black display quality) can be further improved. Examples of electron-withdrawing monovalent groups include formyl groups, acyl groups, ester groups, carboxyl groups, sulfo groups, cyano groups, nitro groups, halogeno groups, quaternary ammonium salts and the like.
As the monovalent group having an electron withdrawing property, a formyl group, a carboxyl group, a sulfo group, a nitro group, and a halogeno group are preferable because they are highly effective in improving display quality and easy to synthesize, and a carboxyl group and a nitro group are preferable. more preferred.
When R ⁷ to R ¹¹ in formula (I) do not have an electron-withdrawing monovalent group, examples of R ⁷ to R ¹¹ in formula (I) include the above-described monovalent groups, and a hydrogen atom. is preferred.

Among R ⁷ to R ¹¹ in formula (I), R ⁷ or R ¹¹ is preferably an electron-withdrawing monovalent group, and R ⁹ is more preferably an electron-withdrawing monovalent group. , R ⁸ or R ¹⁰ is more preferably an electron-withdrawing monovalent group. Positioning the electron-attracting monovalent group at the above position can further improve the display quality.
Among R ⁷ to R ¹¹ in formula (I), the number of electron-withdrawing monovalent groups is 1 to 5, preferably 1 to 3, more preferably 2 to 3. When the number of electron-withdrawing monovalent groups is within the above numerical range, the display quality can be further improved.

In formula (I), Y represents a group that binds to a boron atom. When Y is a group having carbon atoms, the number of carbon atoms is preferably 1-30, more preferably 1-20, even more preferably 1-10. When the number of carbon atoms is at least the above lower limit, various substituents can be introduced into the dipyrromethene boron complex. Dispersibility can be improved as carbon number is below the said upper limit. Moreover, when a monovalent group has a carbon atom, the monovalent group may have a substituent.
Y includes the above-described monovalent groups, preferably a halogen atom or an aryl group, more preferably a fluorine atom or a phenyl group, in consideration of the stability of the dipyrromethene boron complex.

The method for producing the dipyrromethene boron complex of formula (I) is not particularly limited, and for example, it can be produced according to the method described in JP-A-2006-251076.
By appropriately selecting Y in formula (I), the maximum absorption wavelength of the dipyrromethene boron complex can be controlled.

The maximum absorption wavelength of the first coloring material is preferably in the range of 470-530 nm. When the maximum absorption wavelength of the first colorant is equal to or greater than the above lower limit, it is difficult to reduce the luminance of blue light emission. When the maximum absorption wavelength of the first coloring material is equal to or less than the above upper limit, it is difficult to reduce the luminance of green light emission. Therefore, it is easy to achieve both color purity and luminance efficiency by controlling the absorption wavelength and absorption intensity.

The half width of the absorption spectrum of the first coloring material is preferably 15 to 30 nm, more preferably 15 to 25 nm. When the half width of the absorption spectrum of the first coloring material is within the above numerical range, it is easy to achieve both color purity and luminance efficiency.

The pigment (A) may further contain a second coloring material. As the second coloring material, a light absorbing material having a maximum absorption wavelength in the range of 560 to 620 nm and a half width of the absorption spectrum of 15 to 55 nm can be mentioned.
Color purity can be further improved by including the second coloring material having a maximum absorption wavelength and a half width of the absorption spectrum within the above numerical ranges.

The pigment (A) may contain a third coloring material. The third coloring material includes a light absorbing material having a wavelength of 650 to 780 nm with the lowest transmittance in the wavelength range of 400 to 780 nm. By further containing a third coloring material having a maximum absorption wavelength and a half-value width of the absorption spectrum within the above numerical ranges, a decrease in luminance efficiency can be minimized and color purity can be further improved.

The dye (A) is 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 tetradiporphyrin structure, a pyrromethene structure, or an indigo structure. Alternatively, it preferably contains a metal complex thereof. When the dye (A) contains these compounds or metal complexes thereof, both color purity and luminance efficiency can be achieved, and display quality can be further improved.
The dye (A) may contain one of these compounds or metal complexes thereof, or may contain two or more thereof. These compounds or metal complexes thereof may be contained in the first colorant, may be contained in the second colorant, or may be contained in the third colorant. It may be contained in two or more kinds of coloring materials.

<Additive (B)>
Additives (B) include radical scavengers, peroxide decomposers, singlet oxygen quenchers, leveling agents, antifoaming agents, antioxidants, photosensitizers, antifouling agents, conductive materials, and the like. be done. By including the additive (B) in the colored layer-forming composition, various functions can be imparted to the colored layer 10 . Additives (B) may be used alone or in combination of two or more.
As the additive (B), one selected from a radical scavenger, a peroxide decomposer and a singlet oxygen quencher, since it has a function of preventing deterioration of the dye (A) due to light, heat, etc. The above is preferable.

The radical scavenger has a function of scavenging radicals when the dye (A) is oxidatively deteriorated, and has a function of suppressing autoxidation, thereby suppressing dye deterioration (fading). Examples of radical scavengers include hindered amine light stabilizers, aromatic amine antioxidants, phenol antioxidants, etc. Hindered amine light stabilizers having a molecular weight of 2000 or more are particularly preferred. When the hindered amine light stabilizer has a molecular weight of 2000 or more, a high effect of suppressing fading can be obtained. It is believed that this is because the hindered amine light stabilizer is difficult to volatilize and many molecules remain in the colored layer 10, resulting in a sufficient anti-fading effect.
Examples of hindered amine light stabilizers having a molecular weight of 2000 or more include Chimassorb 2020FDL, Chimassorb 944FDL and Tinuvin 622 manufactured by BASF, Adekastab LA-63P manufactured by ADEKA Corporation, and the like.

The peroxide decomposer ionically decomposes a hydroperoxide (ROOH, R is an alkyl group, O is an oxygen atom, and H is a hydrogen atom) into an inactive compound and suppresses the generation of radicals. It is a kind of antioxidant with function. By containing the peroxide decomposer in the additive (B), the oxidative deterioration of the dye (A) can be suppressed, and the life of the light-emitting element having the colored layer 10 can be extended. When the peroxide decomposer corresponds to a singlet oxygen quencher described later, the singlet oxygen quencher is excluded from the peroxide decomposer in this specification.
Examples of peroxide decomposers include sulfur-based antioxidants and phosphorus-based antioxidants. Examples of sulfur-based antioxidants include didodecyl 3,3′-thiodipropionate and 2-mercaptobenzimidazole. Phosphorus antioxidants include, for example, trihexyl phosphite, trioleyl phosphite, trioctyl phosphite, tris(2-ethylhexyl) phosphite, tris(2,4-di-tert-butyl phenyl), tris(1,1,1,3,3,3-hexafluoro-2-propyl) phosphite, triphenyl phosphite, tris(2-methylphenyl) phosphite, tris( 4-methylphenyl), 3,9-bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane and the like.

A singlet oxygen quencher is a compound that suppresses oxidative deterioration of the dye (A) due to singlet oxygen. By containing the singlet oxygen quencher in the additive (B), it is possible to suppress oxidative deterioration of the dye (A) and to extend the life of the light emitting device having the colored layer 10 .
Singlet oxygen quenchers include transition metal complexes, dyes (excluding dye (A)), amines, phenols, sulfides and the like. Materials that are particularly preferably used as the singlet oxygen quencher include transition metal complexes of dialkyl phosphates, dialkyldithiocarbamates, benzenedithiols, and similar dithiols. Nickel, copper, or cobalt is preferably used as the central metal. be done. Examples of singlet oxygen quenchers include NKX1199 (bis[2′-chloro-3-methoxy-4-(2-methoxyethoxy)dithiobenzyl]nickel) and NKX113 (bis(dithiobenzyl) manufactured by Hayashibara Co., Ltd. nickel), NKX114 (bis[4-(dimethylamino)dithiobenzyl]nickel), Tokyo Chemical Industry Co., Ltd. D1781 (dibutyldithiocarbamate nickel (II)), B1350 (bis(dithiobenzyl)nickel (II)) , B4360 (bis[4,4′-dimethoxy(dithiobenzyl)]nickel(II)), T3204 (tetrabutylammonium bis(3,6-dichloro-1,2-benzenedithiolato)nickelate) and the like.

The content of the additive (B) is preferably 0.1 to 20% by mass, more preferably 0.1 to 15% by mass, based on the total mass of the composition for forming a colored layer. When the content of the additive (B) is at least the above lower limit, various functions can be imparted to the colored layer 10 . When the content of the additive (B) is equal to or less than the above upper limit, it is easy to maintain the curability.

<Active energy ray-curable resin (C)>
The active energy ray-curable resin (C) is a resin that polymerizes and cures when irradiated with an active energy ray such as ultraviolet rays. As the active energy ray-curable resin (C), for example, a monofunctional, difunctional, trifunctional or higher (meth)acrylate monomer can be used.
In this specification, "(meth)acrylate" is a generic term for both acrylate and methacrylate, and "(meth)acryloyl" is a generic term for both acryloyl and methacryloyl.

Examples of monofunctional (meth)acrylate compounds include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl ( meth)acrylate, t-butyl (meth)acrylate, glycidyl (meth)acrylate, acryloylmorpholine, N-vinylpyrrolidone, tetrahydrofurfuryl acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isobornyl (meth)acrylate ) acrylate, isodecyl (meth) acrylate, lauryl (meth) acrylate, tridecyl (meth) acrylate, cetyl (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, 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 ) acrylate, 2-(meth)acryloyloxyethyl-2-hydroxypropyl phthalate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, 2-(meth)acryloyloxyethyl hydrogen phthalate, 2-(meth)acryloyloxypropyl Hydrogen phthalate, 2-(meth)acryloyloxypropyl hexahydrohydrogen phthalate, 2-(meth)acryloyloxypropyl tetrahydrohydrogen phthalate, dimethylaminoethyl (meth)acrylate, trifluoroethyl (meth)acrylate, tetrafluoropropyl (meth) derived from acrylates, hexafluoropropyl (meth)acrylate, octafluoropropyl (meth)acrylate, 2-adamantane, adamantanediol and adamantane derivative mono(meth)acrylates such as adamantyl acrylate having a monovalent mono(meth)acrylate that can be used.

Examples of bifunctional (meth)acrylate compounds include ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, butanediol di(meth)acrylate, hexanediol di(meth)acrylate, nonanediol di(meth) Acrylates, 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 Di(meth)acrylates such as meth)acrylate, neopentylglycol di(meth)acrylate, ethoxylated neopentylglycol di(meth)acrylate, tripropyleneglycol di(meth)acrylate, and neopentylglycol hydroxypivalate di(meth)acrylate acrylates and the like.

Examples of tri- or higher functional (meth)acrylate compounds include trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate, and tris-2-hydroxyethyl. Tri(meth)acrylates such as isocyanurate tri(meth)acrylate, glycerin tri(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, ditrimethylolpropane tri(meth)acrylate, etc.) Functional (meth)acrylate compounds, pentaerythritol tetra(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, ditrimethylolpropane penta(meth)acrylate ) acrylate, dipentaerythritol hexa (meth) acrylate, ditrimethylolpropane hexa (meth) acrylate trifunctional or higher polyfunctional (meth) acrylate compounds, and some of these (meth) acrylates are alkyl groups and ε-caprolactone and polyfunctional (meth)acrylate compounds substituted with.

Urethane (meth)acrylate can also be used as the active energy ray-curable resin (C). Examples of urethane (meth)acrylates include those obtained by reacting a product obtained by reacting a polyester polyol with an isocyanate monomer or a prepolymer with a (meth)acrylate monomer having a hydroxyl group. .

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. Examples include urethane prepolymers, pentaerythritol triacrylate isophorone diisocyanate urethane prepolymers, and dipentaerythritol pentaacrylate isophorone diisocyanate urethane prepolymers.

The (meth)acrylate compounds described above may be used alone or in combination of two or more. Moreover, the (meth)acrylate compound described above may be a monomer in the colored layer-forming composition, or may be a partially polymerized oligomer.

The content of the active energy ray-curable resin (C) is preferably 20 to 80% by mass, more preferably 30 to 70% by mass, based on the total mass of the colored layer-forming composition. When the content of the active energy ray-curable resin (C) is at least the above lower limit, the effect of suppressing fading can be further enhanced. When the content of the active energy ray-curable resin (C) is equal to or less than the above upper limit, the handleability of the composition for forming a colored layer can be further enhanced.

<Photoinitiator (D)>
The photopolymerization initiator (D) generates radicals upon irradiation with ultraviolet rays, for example, when ultraviolet rays are used as active energy rays.
Examples of the photopolymerization initiator (D) include benzoins (benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin alkyl ethers such as benzoin isopropyl ether), phenylketones [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.), 2- Alkylphenyl ketones such as hydroxy-2-methylpropiophenone; cycloalkylphenyl ketones such as 1-hydroxycyclohexylphenyl ketone, etc.], aminoacetophenones {2-methyl-1-[4-(methylthio)phenyl]- 2-morpholinoaminopropanone-1, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1 etc.}, anthraquinones (anthraquinone, 2-methylanthraquinone, 2-ethylanthraquinone, 2- t-butyl anthraquinone, 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 (eg, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, etc.), and the like. One of these photopolymerization initiators may be used alone, or two or more thereof may be used in combination.

The content of the photopolymerization initiator (D) is preferably 0.01 to 20% by mass, more preferably 0.1 to 5% by mass, relative to the total mass of the colored layer-forming composition. When the content of the photopolymerization initiator (D) is at least the above lower limit, the composition for forming a colored layer can be sufficiently cured. When the content of the photopolymerization initiator (D) is equal to or less than the above upper limit, the unreacted photopolymerization initiator (D) is less likely to remain, and deterioration of reliability can be suppressed.

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

The content of the solvent (E) is preferably 40 to 70% by mass, more preferably 40 to 60% by mass, based on the total mass of the composition for forming a colored layer. When the content of the solvent (E) is within the above numerical range, the solubility of the dye (A) and the additive (B) is improved, the coating liquid stability (liquid stability) is maintained, and good coating is achieved. Efficiency can be obtained.

By containing the colored layer-forming composition of the present invention, the colored layer 10 can improve color purity and luminance efficiency, achieve both color purity and luminance efficiency, and improve display quality.

≪Transparent substrate≫
The transparent substrate 20 is a sheet-like member positioned on one side of the colored layer 10 and forming the optical film 1 .
As a material for forming the transparent substrate 20, a translucent resin film can be used. For example, transparent resins and inorganic glasses such as polyolefins, polyesters, polyacrylates, polyamides, polyimides, polyarylates, polycarbonates, triacetyl cellulose, polyvinyl alcohol, polyvinyl chloride, cycloolefin copolymers, norbornene-containing resins, polyethersulfones, and polysulfones available. Examples of polyolefin include polyethylene and polypropylene. Examples of polyester include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate and the like. Examples of polyacrylates include polymethyl methacrylate and the like. Polyamides include, for example, nylon 6, nylon 66, and the like. Among these, a film made of polyethylene terephthalate (PET), a film made of triacetyl cellulose (TAC), a film made of polymethyl methacrylate (PMMA), and a film made of polyester other than PET can be preferably used.
The transmittance of the transparent substrate 20 is preferably 90% or more, for example. The transmittance of the transparent substrate 20 can be measured using a spectrophotometer (U-4100, manufactured by Hitachi, Ltd.).

The transparent base material 20 may be provided with an ultraviolet absorbing ability. By adding an ultraviolet absorber to the resin that is the raw material of the transparent base material 20, the transparent base material 20 can be provided with an ultraviolet absorbing ability.

Examples of the ultraviolet absorber include salicylate-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, benzotriazole-based ultraviolet absorbers, and cyanoacrylate-based ultraviolet absorbers.
These ultraviolet absorbers may be used alone or in combination of two or more.

When the transparent substrate 20 is to be provided with an ultraviolet absorbing ability, the ultraviolet shielding rate is preferably 85% or more. Here, the ultraviolet shielding rate is a value measured according to JIS L1925, and calculated by the following formula (I).
UV shielding rate (%) = 100 - (average UV transmittance (%) with a wavelength of 290 to 400 nm) (I)
If the UV shielding rate is less than 85%, the effect of suppressing fading in the light resistance of the dye (A) is reduced.

The thickness of the transparent substrate 20 is preferably 10 to 100 μm, for example. The intensity|strength of the optical film 1 can be improved more as the thickness of the transparent base material 20 is more than the said lower limit. When the thickness of the transparent substrate 20 is equal to or less than the above upper limit, the optical film 1 can be made thinner.
The thickness of the transparent base material 20 is obtained by measuring using a digital caliper or the like.

≪Function layer≫
The functional layer 30 is located on one side or the other side of the colored layer 10 . The optical film 1 can exhibit various functions by having the functional layer 30 .
Functions of the functional layer 30 include an antireflection function, an antiglare function, an oxygen barrier function, an antistatic function, an antifouling function, a strengthening function, an ultraviolet absorbing function (ultraviolet absorbing power), and the like.
The functional layer 30 may be a single layer or multiple layers. The functional layer 30 may have one type of function, or may have two or more types of functions.

When the optical film 1 has an antireflection function, the functional layer 30 functions as an antireflection layer. Examples of the antireflection layer include a hard coat layer 32, an antiglare layer 34, and a low refractive index layer 31 having a lower refractive index than the transparent substrate 20, which will be described later. The low refractive index layer 31 can be formed by using a material having a lower refractive index than the materials of the hard coat layer 32, the antiglare layer 34, and the transparent base material 20 for the functional layer.
For adjusting the refractive index _of the low refractive index layer 31, lithium fluoride (LiF), magnesium fluoride ( _MgF2 ), sodium hexafluoroaluminum (cryolite, cryolite, _3NaF.AlF3 , _Na3AlF6 ), Fine particles such as aluminum fluoride (AlF ₃ ) or silica fine particles may be blended. As the silica fine particles, it is effective to lower the refractive index of the low refractive index layer 31 by using porous silica fine particles, hollow silica fine particles, or the like having voids inside the particles. In addition, the composition for forming the low refractive index layer 31 (the composition for forming the low refractive index layer) contains the photopolymerization initiator (D), the additive (B), and the solvent (E) described in the colored layer 10. It may be blended as appropriate.
The refractive index of the low refractive index layer 31 is preferably 1.20 to 1.55.
Although the thickness of the low refractive index layer 31 is not particularly limited, it is preferably 40 nm to 1 μm, for example.

When the optical film 1 has an antiglare function, the functional layer 30 functions as an antiglare layer 34 . The anti-glare layer 34 is a layer that has minute unevenness on the surface, and that the unevenness scatters external light, suppresses glare, and improves display quality. When combined with the low refractive index layer 31, the low refractive index layer 31 and the antiglare layer 34 constitute an antireflection layer.
The anti-glare layer 34 contains at least one selected from organic fine particles and inorganic fine particles, if necessary. The organic fine particles are materials that form fine unevenness on the surface and provide the function of scattering external light. Examples of organic fine particles include translucent resin materials such as acrylic resins, polystyrene resins, styrene-(meth)acrylate copolymers, polyethylene resins, epoxy resins, silicone resins, polyvinylidene fluoride, and polyethylene fluoride resins. Resin particles consisting of In order to adjust the refractive index and the dispersibility of the resin particles, two or more kinds of resin particles having different materials (refractive indexes) may be mixed and used.
Inorganic fine particles are materials that adjust sedimentation and aggregation of organic fine particles. Examples of inorganic fine particles that can be used include silica fine particles, metal oxide fine particles, and various mineral fine particles. Examples of silica fine particles that can be used include colloidal silica and silica fine particles surface-modified with reactive functional groups such as (meth)acryloyl groups. Examples of metal oxide fine particles that can be used include alumina (aluminum oxide), zinc oxide, tin oxide, antimony oxide, indium oxide, titania (titanium dioxide), and zirconia (zirconium dioxide). Mineral fine particles include, for example, mica, synthetic mica, vermiculite, montmorillonite, iron montmorillonite, bentonite, beidellite, saponite, hectorite, stevensite, nontronite, magadiite, islarite, kanemite, layered titanate, smectite, synthetic Smectite and the like can be used. Mineral fine particles may be either natural products or synthetic products (including substituted products and derivatives), and a mixture of both may be used. Among the fine mineral particles, layered organoclays are more preferred. A layered organic clay is a swelling clay in which an organic onium ion is introduced between layers. The organic onium ion is not limited as long as it can be organized by utilizing the cation exchange property of the swelling clay. When layered organoclay minerals are used as fine mineral particles, the synthetic smectites described above can be suitably used. Synthetic smectite has the function of increasing the viscosity of the coating liquid for forming the antiglare layer, suppressing the sedimentation of resin particles and inorganic fine particles, and adjusting the irregular shape of the surface of the antiglare layer 34 (functional layer 30). have.

The functional layer 30 functions as an oxygen barrier layer 33 when the optical film 1 has an oxygen barrier function. The oxygen permeability of the oxygen barrier layer 33 is 10 cm ³ /(m ² ·day·atm) or less, preferably 5 cm ³ /(m ² ·day·atm) or less, and 1 cm ³ /(m ² ·day·atm) or less. ) below is more preferred. When the oxygen permeability of the oxygen barrier layer 33 is equal to or lower than the above upper limit value, the functional layer 30 can be provided with a sufficient oxygen barrier function. The lower limit of the oxygen permeability of the oxygen barrier layer 33 is not particularly limited, and may be 0 cm ³ /(m ² ·day·atm).
The oxygen permeability of the oxygen barrier layer 33 is a value measured using an oxygen permeability measuring device under the conditions of 30° C. and 60% relative humidity.

When the optical film 1 has an antistatic function, the functional layer 30 functions as an antistatic layer. The antistatic layer includes, for example, antimony-doped tin oxide (ATO), tin-doped indium oxide (ITO) and other metal oxide fine particles, polymeric conductive compositions, and antistatic materials such as quaternary ammonium salts. A layer containing an agent is included.
The antistatic layer may be provided on the outermost surface of the functional layer 30 or may be provided between the functional layer 30 and the transparent substrate 20 . Alternatively, an antistatic layer may be formed by adding an antistatic agent to any of the layers constituting the functional layer 30 described above. When an antistatic layer is provided, the optical film preferably has a surface resistance value of 1.0×10 ⁶ to 1.0×10 ¹² (Ω/cm).

When the optical film 1 has an antifouling function, the functional layer 30 functions as an antifouling layer. The antifouling layer enhances antifouling properties by imparting both or one of water repellency and oil repellency. Examples of the antifouling layer include layers containing antifouling agents such as silicon oxides, fluorine-containing silane compounds, fluoroalkylsilazanes, fluoroalkylsilanes, fluorine-containing silicon compounds, and perfluoropolyether group-containing silane coupling agents. be done.
The antifouling layer may be provided on the outermost surface of the functional layer 30, and the antifouling layer may be formed by adding an antifouling agent to the outermost layer of the functional layer 30 described above. .

When the optical film 1 has a reinforcing function, the functional layer 30 functions as a reinforcing layer. The reinforcing layer is a layer that enhances the strength of the optical film. Examples of the reinforcing layer include the hard coat layer 32 . The hard coat layer 32 includes, for example, a layer formed of a hard coat agent containing monofunctional, bifunctional, or trifunctional (meth)acrylate or urethane (meth)acrylate.

When the optical film 1 has ultraviolet absorption ability, the functional layer 30 functions as an ultraviolet absorption layer. Examples of the ultraviolet absorbing layer include triazines such as 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-hexyloxyphenol, 2-(2H-benzotriazole-2- yl)-4-methylphenol and other layers containing UV absorbers such as benzotriazoles.
The content of the ultraviolet absorber is preferably 0.1 to 5% by weight with respect to the total weight of the material forming the ultraviolet absorbing layer. When the content of the ultraviolet absorber is at least the above lower limit value, the functional layer 30 can be provided with sufficient ultraviolet absorbability. When the content of the ultraviolet absorber is equal to or less than the above upper limit, it is possible to avoid insufficient hardness due to a decrease in the curing component.

In the optical film 1, one or both of the transparent substrate 20 and the functional layer 30 has an ultraviolet shielding rate of 85% or more, preferably 90% or more, more preferably 95% or more, and may be 100%. Light resistance can be improved as an ultraviolet shielding rate is more than the said lower limit.
The ultraviolet shielding rate can be measured according to the method described in JIS L1925.
The UV shielding rate can be adjusted by imparting UV absorbing ability to one or both of the transparent substrate 20 and the functional layer 30 .

The thickness of the functional layer 30 is, for example, preferably 0.04 to 25 μm, more preferably 0.1 to 20 μm, even more preferably 0.2 to 15 μm. When the thickness of the functional layer 30 is at least the above lower limit, it is easy to impart various functions to the optical film 1 . If the thickness of the functional layer 30 is equal to or less than the above upper limit, it is advantageous for thinning the display device.
The thickness of the functional layer 30 is obtained by observing a cross section of the optical film 1 in the thickness direction with a microscope or the like.

[Method for producing optical film]
The optical film 1 of this embodiment can be manufactured by a conventionally known method.
For example, the colored layer 10 is obtained by applying the colored layer-forming composition to one surface of the transparent substrate 20 and curing the colored layer-forming composition by irradiating it with an active energy ray.
The light source for curing the colored layer-forming composition by irradiating active energy rays to form the colored layer 10 can be used without limitation as long as it generates active energy rays. As active energy rays, radiation (gamma rays, X-rays, etc.), light energy rays such as ultraviolet rays, visible rays, and electron beams (EB) can be used, and usually ultraviolet rays and electron beams are often used. For example, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, a carbon arc lamp, a metal halide lamp, a xenon lamp, an electrodeless discharge tube, or the like can be used as a lamp that emits ultraviolet rays. As irradiation conditions, the amount of ultraviolet irradiation is usually 100 to 1000 mJ/cm ² .

Next, a hard coat layer 32 is obtained by applying a hard coat agent to the other surface of the transparent substrate 20 and curing the hard coat agent by irradiating active energy rays in the same manner as for the colored layer 10 .

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.
The method for forming the low refractive index layer 31 is not limited, and the hard coat layer 32 is coated with a composition for forming a low refractive index layer and irradiated with an active energy ray to be cured. A coating method, an ion beam method, a plasma vapor deposition method, or the like can be used.

[Other embodiments]
As shown in FIG. 2, the optical film has a transparent substrate 20 located on one side of the colored layer 10, and comprises the colored layer 10, the transparent substrate 20, the oxygen barrier layer 33, the hard coat layer 32, the low refractive index The index layer 31 may be the optical film 2 laminated in this order. In the optical film 2 , the oxygen barrier layer 33 , the hard coat layer 32 and the low refractive index layer 31 constitute the functional layer 30 . As the oxygen barrier layer 33, the same layer as the oxygen barrier layer described above can be used. In this case, the functional layer 30 and the transparent substrate 20 have an ultraviolet shielding property with an ultraviolet shielding rate of 85% or more.
Since the optical film 2 of this embodiment has the oxygen barrier layer 33 , it is superior to the optical film 1 in oxygen barrier properties.

As shown in FIG. 3, the optical film has a transparent substrate 20 located on one side of the colored layer 10, and the colored layer 10, the transparent substrate 20, and the antiglare layer 34 are laminated in this order. It may be the optical film 3 . In the optical film 3 , the antiglare layer 34 constitutes the functional layer 30 . As the antiglare layer 34, the same layer as the antiglare layer described above can be used. In this case, the functional layer 30 and the transparent substrate 20 have an ultraviolet shielding property with an ultraviolet shielding rate of 85% or more.
Since the optical film 3 of the present embodiment has the antiglare layer 34, it is superior in display quality.

As shown in FIG. 4, the optical film has a transparent substrate 20 positioned on one side of the colored layer 10, and the colored layer 10, the transparent substrate 20, the antiglare layer 34, and the low refractive index layer 31 are The optical film 4 may be laminated in this order. In the optical film 4 , the antiglare layer 34 and the low refractive index layer 31 constitute the functional layer 30 . In this case, the functional layer 30 and the transparent substrate 20 have an ultraviolet shielding property with an ultraviolet shielding rate of 85% or more.
Since the optical film 4 of the present embodiment has the low refractive index layer 31 and the antiglare layer 34, it is superior in display quality.

As shown in FIG. 5, the optical film has a transparent substrate 20 located on one side of the colored layer 10 and a functional layer 30 located on the other side of the colored layer 10. The transparent substrate 20, The optical film 5 may be formed by laminating the colored layer 10, the hard coat layer 32, and the low refractive index layer 31 in this order. In the optical film 5 , the hard coat layer 32 and the low refractive index layer 31 constitute the functional layer 30 . In this case, the functional layer 30 has an ultraviolet shielding property with an ultraviolet shielding rate of 85% or more.
Since the optical film 5 of the present embodiment has the colored layer 10 and the functional layer 30 on one surface of the transparent substrate 20, the display quality is superior.

As shown in FIG. 6, the optical film has a transparent substrate 20 located on one side of the colored layer 10 and a functional layer 30 located on the other side of the colored layer 10. The transparent substrate 20, The optical film 6 may be formed by laminating the colored layer 10, the oxygen barrier layer 33, the hard coat layer 32, and the low refractive index layer 31 in this order. In the optical film 6 , the oxygen barrier layer 33 , hard coat layer 32 and low refractive index layer 31 constitute the functional layer 30 . In this case, the functional layer 30 has an ultraviolet shielding property with an ultraviolet shielding rate of 85% or more.
Since the optical film 6 of this embodiment has the oxygen barrier layer 33 , it is superior to the optical film 5 in oxygen barrier properties.

As shown in FIG. 7, the optical film has a transparent substrate 20 located on one side of the colored layer 10 and a functional layer 30 located on the other side of the colored layer 10. The transparent substrate 20, The colored layer 10 and the antiglare layer 34 may be the optical film 7 laminated in this order. In the optical film 7 , the antiglare layer 34 constitutes the functional layer 30 . In this case, the functional layer 30 has an ultraviolet shielding property with an ultraviolet shielding rate of 85% or more.
Since the optical film 7 of the present embodiment has the antiglare layer 34, it is superior in display quality.

As shown in FIG. 8, the optical film has a transparent substrate 20 located on one side of the colored layer 10 and a functional layer 30 located on the other side of the colored layer 10. The transparent substrate 20, The optical film 8 may be formed by laminating the colored layer 10, the antiglare layer 34, and the low refractive index layer 31 in this order. In the optical film 8 , the antiglare layer 34 and the low refractive index layer 31 constitute the functional layer 30 . In this case, the functional layer 30 has an ultraviolet shielding property with an ultraviolet shielding rate of 85% or more.
Since the optical film 8 of the present embodiment has the low refractive index layer 31 and the antiglare layer 34, it is superior in display quality.

[Display device]
A display device of the present invention includes the optical film of the present invention. Specific examples of the display device include, for example, televisions, monitors, mobile phones, portable game devices, personal digital assistants, personal computers, electronic books, video cameras, digital still cameras, head-mounted displays, navigation systems, sound playback devices ( car audio, digital audio player, etc.), copiers, facsimiles, printers, multifunction printers, vending machines, automated teller machines (ATMs), personal authentication devices, optical communication devices, IC cards, and the like.

According to the optical film of the present embodiment, since it has a colored layer containing the colored layer-forming composition of the present invention, it is possible to improve the color purity and the luminance efficiency and achieve both the color purity and the luminance efficiency. Therefore, the display device provided with the optical film of this embodiment can improve the display quality.

As described above, each embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment. included.

For example, although the optical film of the present embodiment has one colored layer 10, the number of colored layers may be two or more.
In the optical film of this embodiment, the ultraviolet absorbing ability may be imparted to the transparent substrate 20 or to the functional layer 30 such as the hard coat layer 32 .

EXAMPLES The present invention will be described in more detail below using examples, but the present invention is not limited to these examples.

In the following examples and comparative examples, optical films A to P having layer structures shown in Tables 1 and 2 were produced and evaluated. In Tables 1 and 2, "-" indicates that the layer does not exist.

[Production of optical film]
A method for forming each layer will be described below.

≪Transparent substrate≫
The following materials were used as transparent substrates used for optical film formation.
TAC: triacetyl cellulose film (TG60UL, substrate thickness 60 µm, ultraviolet shielding rate 92.9%, manufactured by Fuji Film Co., Ltd.).

<<Formation of colored layer>>
(Composition for forming colored layer)
The following materials were used for the colored layer-forming composition used for forming the colored layer, and the colored layer-forming composition shown in Table 3 was prepared. In Table 3, the amount added is a mass ratio (% by mass), and "-" indicates that the component is not contained.
The absorption maximum wavelength, half width, and minimum transmittance wavelength in the specified wavelength range of the coloring material are characteristic values of the cured coating film.

<Dye (A)>
(First colorant, comparison colorant of the first colorant)
- I-1, I-2, I-3, I-4, I-5, Ref: dipyrromethene boron complexes, compounds having monovalent groups listed in Table 4; H denotes a hydrogen atom, _CH3 a methyl group, _NO2 a nitro group, COOH a carboxyl group and F a fluorine atom.
Dye-1: cyanine dye (NK-7803, manufactured by Hayashibara Co., Ltd., absorption maximum wavelength 494 nm, half width 44 nm).
Dye-2: A dipyrromethene copper complex represented by the following formula (II) (maximum absorption wavelength: 498 nm, half width: 71 nm).
Dye-3: A dipyrromethene zinc complex represented by the following formula (III) (maximum absorption wavelength: 489 nm, half width: 27 nm).
(Second colorant)
Dye-4: Tetraazaporforin copper complex dye (manufactured by Yamada Kagaku Kogyo Co., Ltd., FDG-007, absorption maximum wavelength 595 nm, half width 22 nm).
(Third colorant)
Dye-5: phthalocyanine copper complex dye (manufactured by Yamada Kagaku Kogyo Co., Ltd., FDN-002, minimum transmittance wavelength 780 nm at 400 to 780 nm).

<Additive (B)>
Chimassorb 944FDL: radical scavenger, hindered amine light stabilizer (HALS) (manufactured by BASF Japan Ltd., molecular weight 2000-3100).
- D1781: singlet oxygen quencher, bis(dibutyldithiocarbamate) nickel (II), product code D1781 (manufactured by Tokyo Chemical Industry Co., Ltd.).

<Active energy ray-curable resin (C)>
UA-306H: Pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer (UA-306H, manufactured by Kyoeisha Chemical Co., Ltd.).
- DPHA: dipentaerythritol hexaacrylate.
• PETA: pentaerythritol triacrylate.

<Photoinitiator (D)>
- Omnirad TPO: an acylphosphine oxide-based photopolymerization initiator (manufactured by IGM Resins B.V.).

<Solvent (E)>
• MEK: methyl ethyl ketone.
• Methyl acetate: methyl acetate.

(Formation of colored layer)
The colored layer-forming composition shown in Table 3 was applied onto the transparent substrate shown in Tables 1 and 2, and dried in an oven at 80°C for 60 seconds. After that, the coating film is cured by performing ultraviolet irradiation with an irradiation dose of 150 mJ/cm ² (manufactured by Fusion UV Systems Japan Co., Ltd., light source H bulb) using an ultraviolet irradiation device, and the film thickness after curing is 5.0 μm. A colored layer was formed so as to be

<<Formation of functional layer: oxygen barrier layer>>
(Composition for forming oxygen barrier layer)
· Polyvinyl alcohol (PVA) resin for binder, Kuraray Poval (registered trademark) PVA-117 (manufactured by Kuraray Co., Ltd.) 80 mass% aqueous solution.

(Formation of oxygen barrier layer)
An oxygen barrier layer having an oxygen permeability of 1 cm ³ /(m ² ·day · atm) was obtained by coating the above composition for forming an oxygen barrier layer on the transparent substrate of Example 10 shown in Table 1 and drying it. formed.

<<Formation of functional layer: hard coat layer>>
(Composition for forming hard coat layer)
The hard coat layer-forming composition shown in Table 5 was prepared using the following materials as materials for the hard coat layer-forming composition used for forming the hard coat layer. The amount added in Table 5 is a mass ratio (% by mass), and "-" in Table 5 indicates that the component is not contained.
Active energy ray-curable resin UA-306H: pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer (UA-306H, manufactured by Kyoeisha Chemical Co., Ltd.).
DPHA: dipentaerythritol hexaacrylate.
PETA: pentaerythritol triacrylate.
- Photopolymerization initiator Omnirad TPO: acylphosphine oxide-based photopolymerization initiator (manufactured by IGM Resins B.V.).
Omnirad 184: Alkylphenone-based photopolymerization initiator (manufactured by IGM Resins B.V.).
・Additive (ultraviolet (UV) absorber)
Tinuvin479: Hydroxyphenyltriazine-based UV absorber, Tinuvin (registered trademark) 479 (manufactured by BASF Japan Ltd.).
LA-36: benzotriazole-based ultraviolet absorber, ADEKA STAB (registered trademark) LA-36 (manufactured by ADEKA Corporation).
• Solvent MEK: methyl ethyl ketone.
Methyl acetate: Methyl acetate.

(Formation of hard coat layer)
The composition for forming a hard coat layer shown in Table 5 was applied onto the transparent substrate or oxygen barrier layer shown in Tables 1 and 2, and dried in an oven at 80°C for 60 seconds. After that, the coating film is cured by performing ultraviolet irradiation with an irradiation dose of 150 mJ/cm ² (manufactured by Fusion UV Systems Japan Co., Ltd., light source H bulb) using an ultraviolet irradiation device, and the film thickness after curing is 5.0 μm. A hard coat layer was formed so as to be

<<Formation of functional layer: Anti-glare layer>>
(Composition for forming antiglare layer)
The following composition was used for forming the antiglare layer.
Active energy ray-curable resin pentaerythritol triacrylate, light acrylate PE-3A (manufactured by Kyoeisha Chemical Co., Ltd., refractive index 1.52) 43.7 parts by mass.
- Photoinitiator Omnirad TPO (manufactured by IGM Resins B.V.) 4.55 parts by mass.
- Resin particles Styrene-methyl methacrylate copolymer particles (refractive index 1.515, average particle size 2.0 µm) 0.5 parts by mass.
- Inorganic fine particles Synthetic sukumetite 0.25 parts by mass.
Alumina nanoparticles (average particle size 40 nm) 1.0 parts by mass.
- Solvent toluene 15 parts by mass.
Isopropyl alcohol 35 parts by mass.

(Formation of antiglare layer)
The antiglare layer-forming composition was applied onto the transparent substrate shown in Table 1 and dried in an oven at 80° C. for 60 seconds. After that, the coating film is cured by performing ultraviolet irradiation with an irradiation dose of 150 mJ/cm ² (manufactured by Fusion UV Systems Japan Co., Ltd., light source H bulb) using an ultraviolet irradiation device, and the film thickness after curing is 5.0 μm. The antiglare layer was formed so that

<<Formation of functional layer: Low refractive index layer>>
(Composition for forming low refractive index layer)
The following composition was used for forming the low refractive index layer.
• Refractive index adjuster: 8.5 parts by mass of porous silica fine particles (average particle size: 75 nm, solid content: 20%) methyl isobutyl ketone dispersion.
Antifouling agent Optool (registered trademark) AR-110 (manufactured by Daikin Industries, Ltd., solid content 15%, solvent: methyl isobutyl ketone) 5.6 parts by mass.
- Active energy ray-curable resin Pentaerythritol triacrylate (PETA) 0.4 parts by mass.
- Photopolymerization initiator Omnirad TPO (manufactured by IGM Resins B.V.) 0.07 parts by mass.
· Leveling agent RS-77 (manufactured by DIC Corporation) 1.7 parts by mass.
- Solvent Methyl isobutyl ketone 83.73 parts by mass.

(Formation of low refractive index layer)
The composition for forming a low refractive index layer was applied onto the hard coat layer or the antiglare layer shown in Tables 1 and 2, and dried in an oven at 80°C for 60 seconds. After that, the coating film is cured by performing ultraviolet irradiation with an irradiation dose of 200 mJ/cm ² (manufactured by Fusion UV Systems Japan Co., Ltd., light source H bulb) using an ultraviolet irradiation device, and the film thickness after curing is 100 nm. A low refractive index layer was formed.

Using the obtained optical film, the following evaluation tests were conducted.

[Examples 1 to 5, Comparative Example 1]
<Fluorescence property comparison test>
The optical film of Comparative Example 1 produced using a dye in which all of the monovalent groups of R ⁷ to R ¹¹ in formula (I) are hydrogen atoms and does not contain an electron-attracting monovalent group was used as a reference (Ref). . The fluorescence intensity of the optical film of each example was measured using a spectrofluorometer (RF-5300PC, manufactured by Shimadzu Corporation), and the fluorescence intensity (fluorescence intensity ratio) relative to the fluorescence intensity of Ref was calculated. Table 6 shows the results. The smaller the fluorescence intensity ratio, the better the fluorescence characteristics of the optical film and the better the display quality.

[Examples 1 and 10, Comparative Examples 2 to 5]
Using the optical films of Examples 1 and 10 and Comparative Examples 2 to 5, luminance efficiency and color purity were evaluated by the methods described below. Table 7 shows the results.

<Evaluation of luminance efficiency>
The transmittance of the optical film of each example was measured using an automatic spectrophotometer (U-4100, manufactured by Hitachi, Ltd.), and the luminance efficiency was evaluated using this transmittance. Luminance efficiency was obtained by the following procedure. Using an organic EL display ProArt PQ22UC panel manufactured by ASUS, spectra for blue display, green display, and red display were obtained. A graph of each spectrum is shown in FIG. In FIG. 9, the horizontal axis of the graph represents wavelength [nm], and the vertical axis of the graph represents emission intensity [a. u. ] (arbitrary unit). With respect to the luminance of each color output after each spectrum of red display, green display, and blue display is transmitted through the optical film, the luminance efficiency when displaying each color (Red luminance efficiency , Green luminance efficiency, and Blue luminance efficiency) were evaluated. The closer to 100, the higher the brightness and the better the brightness efficiency.

<Evaluation of color purity>
The transmittance of the optical film of each example was measured using an automatic spectrophotometer (U-4100, manufactured by Hitachi, Ltd.). The DCI inclusion rate (%) was calculated from the CIE1931 chromaticity values calculated using the red display, green display, and blue display spectra obtained by the decomposition of .
Here, the DCI inclusion ratio represents the ratio of the area of the DCI standard color gamut that overlaps with the color reproduction gamut of the image display device to the area of the entire DCI standard color gamut. The DCI standard means a digital cinema standard defined by an organization (Digital Cinema Initiative) formed by seven movie studios in the United States. The color gamut of the DCI standard is blue coordinates (x, y) = (0.150, 0.060), green coordinates (x, y) = (0.265, 0.690) and red coordinates (x, y)=(0.680, 0.320). The closer the DCI inclusion rate is to 100%, the better the color purity.

[Examples 1, 6 to 10, Comparative Example 6]
Regarding the reliability of the optical films of Examples 1 and 6 to 10 and Comparative Example 6, the UV shielding rate and light resistance of the upper layer of the colored layer were evaluated. Table 8 shows the results.

<Evaluation of UV shielding rate of colored layer upper layer>
When a transparent base material was formed above the colored layer, the transmittance of the base material was measured using an automatic spectrophotometer (U-4100, manufactured by Hitachi, Ltd.). In addition, when the colored layer is above the base material, JIS-K5600-5-6: Using a transparent pressure-sensitive adhesive tape compliant with the 1999 adhesion test, peel off the upper layer from the colored layer and use the automatic spectrophotometer. Using the adhesive tape as a reference, the transmittance of the upper layer of the colored layer was measured. Using these transmittances, the average transmittance [%] in the ultraviolet region (290 to 400 nm) is calculated, and the ultraviolet shielding rate [%] is changed from 100% to the average transmittance [%] in the ultraviolet region (290 to 400 nm). was calculated as the value after subtracting

<Evaluation of light resistance>
Using a xenon weather meter tester (manufactured by Suga Test Instruments Co., Ltd., X75) for the optical film of each example, under the conditions of an illuminance of 60 W/m ² (300 to 400 nm), a temperature in the tester of 45 ° C., and a humidity of 50% RH, A xenon lamp was irradiated for 50 hours. The transmittance before and after irradiation is measured with an automatic spectrophotometer (U-4100, manufactured by Hitachi, Ltd.), and the difference in transmittance ((transmittance difference )=(Transmittance after irradiation)−(Transmittance before irradiation)) (%) was calculated, and light resistance was evaluated based on the following evaluation criteria.
"Evaluation criteria"
A: The difference in transmittance is 20% or less.
○: The difference in transmittance is more than 20% and 30% or less.
x: The difference in transmittance exceeds 30%.

As shown in Table 6, it was found that Examples 1 to 5 to which the present invention was applied had a fluorescence intensity ratio of 0.4 or less, emitted less fluorescence than Comparative Example 1, and were excellent in display quality.
As shown in Table 7, Examples 1 and 10 to which the present invention is applied have a DCI inclusion rate of 96.4% or more, and have a higher DCI inclusion rate and excellent color purity than Comparative Example 2 containing no dye. I found out. On the other hand, in Comparative Examples 3, 4, and 5, in which the coloring matter of the comparative component (comparative coloring material of the first coloring material) was used instead of the first coloring material of the present invention, the DCI inclusion ratio was the same as that of Example 1. However, the luminance efficiency of blue is less than 80%, and both color purity and luminance efficiency cannot be achieved.
As shown in Table 8, in Examples 1 and 6 to 10 to which the present invention was applied, the ultraviolet shielding rate of the upper layer of the colored layer was 85% or more, and the light resistance evaluation result was "○" or "◎". was also excellent. In Comparative Example 6, which has a low ultraviolet shielding rate in the upper layer of the colored layer and does not contain the additive (B) that improves reliability in the colored layer-forming composition, the colorant fades significantly in the light resistance test, and the reliability is low. was inferior.

From the results in Table 7, it was found that the dipyrromethene boron complex of the present invention was superior in blue luminance efficiency compared to other dyes, even with the same color purity. In addition, the additive in the composition for forming the colored layer and the provision of an ultraviolet shielding layer having an ultraviolet shielding rate of 85% or more and an oxygen barrier layer as functional layers have resulted in excellent reliability. This is believed to lead to improvement in the life of OLED light-emitting elements, particularly blue phosphors, which have a short life.

It was found that the optical film using the composition for colored layer of the present invention can improve color purity and luminance efficiency, achieve both color purity and luminance efficiency, and improve display quality.

1, 2, 3, 4, 5, 6, 7, 8 Optical film 10 Colored layer 20 Transparent substrate 30 Functional layer 31 Low refractive index layer 32 Hard coat layer 33 Oxygen barrier layer 34 Antiglare layer

In the following examples and comparative examples, optical films A to P having layer structures shown in Tables 1 and 2 were produced and evaluated. In Tables 1 and 2, "-" indicates that the layer does not exist. In addition, Examples 3 and 5 are reference examples.

Claims (9)

Containing a dye (A), an additive (B), an active energy ray-curable resin (C), a photopolymerization initiator (D), and a solvent (E),
The dye (A) contains a first colorant,
A composition for forming a colored layer, wherein the first coloring material contains a dipyrromethene boron complex having a structure represented by the following formula (I).

[In formula (I), R ¹ to R ¹¹ each independently represent a monovalent group, and both or either one of R ² and R ³ and R ⁴ and R ⁵ are bonded to each other to form a pyrrole ring; A condensed aromatic ring may be formed, the aromatic ring may have a substituent, and the condensed aromatic rings formed by these may be the same or different. , R ⁷ to R ¹¹ , at least one has an electron-withdrawing monovalent group, Y represents a group that binds to boron, and a plurality of Y may be the same or different. may be combined with each other to form a ring. ] 2. The composition for forming a colored layer according to claim 1, wherein the first colorant has a maximum absorption wavelength in the range of 470 to 530 nm and a half width of the absorption spectrum of 15 to 30 nm. The coloring according to claim 1 or 2, wherein the dye (A) has a maximum absorption wavelength in the range of 560 to 620 nm and further contains a second coloring material having a half width of the absorption spectrum of 15 to 55 nm. Layer-forming composition. 4. The dye (A) according to any one of claims 1 to 3, further comprising a third coloring material having a lowest transmittance wavelength in the range of 650 to 780 nm in the wavelength range of 400 to 780 nm. A composition for forming a colored layer as described above. A compound in which the dye (A) has 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 tetradiporphyrin structure, a pyrromethene structure and an indigo structure. and a metal complex thereof, the composition for forming a colored layer according to any one of claims 1 to 4. A colored layer that is a cured product of the colored layer forming composition according to any one of claims 1 to 5;
a transparent substrate positioned on one side of the colored layer;
a functional layer located on one or the other surface of the colored layer,
One or both of the transparent base material and the functional layer has an ultraviolet shielding rate of 85% or more measured according to the method described in JIS L1925,
The optical film, wherein the functional layer functions as an antireflection layer or an antiglare layer. 7. The optical film according to claim 6, further comprising an oxygen barrier layer having an oxygen permeability of 10 cm ^<3> /(m ^<2> *day*atm) or less as the functional layer. 8. The optical film according to claim 6, further comprising an antistatic layer or an antifouling layer as the functional layer. A display device comprising the optical film according to any one of claims 6 to 8.

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