Laminate

Abstract

Provided is a laminate with which both suppression of reflection appearance caused by light reflection inside and outside a panel during black display and improvement of luminance during white display can be achieved in a display device using a quantum dot organic EL panel. This laminate includes a low reflection film and a functional layer. The low reflection film has a luminous average reflectance of 0.05%-5% inclusive and a total light transmittance of 93% or more. The functional layer is a cured film obtained by curing a liquid crystal compound and a dichroic dye in a state of being oriented in a direction perpendicular to a layer plane.

Description

Laminate

[0001] The present invention relates to a laminate, particularly to a laminate for use in a quantum dot organic EL display device, and to a display device including the same.

[0002] Organic EL display devices using organic electroluminescence (organic EL or OLED) elements can be made lighter and thinner than liquid crystal display devices and the like, and can also achieve high image quality such as a wide viewing angle, fast response speed, and high contrast, and are therefore used in a variety of fields such as smartphones, televisions, digital cameras, etc. In organic EL display devices, in order to suppress deterioration of visibility due to light reflection at electrodes constituting the device or reflection of external light, a circular polarizing plate, which is an optical member formed by laminating a polarizing film and a retardation film, as disclosed in Patent Document 1, for example, is used.

[0003] Japanese Patent Application Laid-Open No. 2020-95255

[0004] In recent years, development of quantum dot organic EL panels using quantum dots (QDs) as a material for the light-emitting layer of organic EL elements has progressed. Compared to conventional organic EL panels, quantum dot organic EL panels have a sharper emission spectrum, which allows for excellent color reproducibility and a wider color gamut, drawing attention. As with conventional organic EL displays, display devices using such quantum dot organic EL panels must suppress external light reflection during black display and light reflection at the electrodes to ensure high visibility. Conventional organic EL display panels solve the problem of light reflection by using a circular polarizer. However, quantum dot organic EL panels have lower emission intensity than conventional organic EL panels, making it difficult to ensure sufficient brightness using a circular polarizer that, in principle, absorbs light. For this reason, it is difficult to ensure anti-reflection functionality in quantum dot organic EL panels using a circular polarizer, and generally, an anti-reflection film (AR (Anti-Reflection) film, LR (Low-Reflection) film) that reduces reflected light by utilizing the interference effect of light is laminated on the viewing side of the light-emitting layer to suppress external light reflection on the display screen and improve visibility.

[0005] However, this phenomenon, which occurs specifically when using quantum dot organic EL panels, is that external light taken into the display device is reflected by the electrodes during black display, and the reflected light is scattered by the light diffusing agent contained in the QD filter, causing the reflected light to appear whitish on the panel. This phenomenon cannot be resolved by anti-reflection films that aim to prevent light reflection from outside the screen. For this reason, display devices using quantum dot organic EL panels require technology to suppress the decrease in visibility caused by light reflection inside and outside the panel during black display, without using circular polarizers, which, due to their structure, lead to a decrease in brightness during white display.

[0006] The present invention aims to provide a laminate that can suppress the reflective appearance caused by light reflection inside and outside the panel during black display and improve the luminance during white display in a display device using a quantum dot organic EL panel. Hereinafter, in this specification, the term "reflective appearance" will be used to refer to both external light reflection, such as glare on the display screen, and the phenomenon in which reflected light appears whitish on the panel due to light reflection at the electrodes. Expressions such as "suppressing the reflective appearance," "improving the reflective appearance," and "having a (high or excellent) reflective appearance effect" refer to the effect of suppressing or preventing the reflective appearance phenomenon.

[0007] The present inventors have conducted extensive research to solve the above-mentioned problems, and have completed the present invention. Specifically, the present invention encompasses the following preferred embodiments. [1] A laminate including a low-reflection film and a functional layer, wherein the low-reflection film has an average luminous reflectance of 0.05% to 5% and a total light transmittance of 93% or more, and the functional layer is a cured film formed by curing a liquid crystal compound and a dichroic dye in a state where the liquid crystal compound and the dichroic dye are aligned perpendicular to the layer plane. [2] The laminate according to [1], wherein the dichroic dye includes a combination of at least one cyan dye, at least one magenta dye, and at least one yellow dye. [3] The laminate according to [1] or [2], wherein the low-reflection film includes a low-reflection layer and a substrate. [4] The laminate according to [3], wherein the low-reflection film includes a low-reflection layer and a substrate. [5] The laminate according to any one of [1] to [4], wherein the functional layer does not exhibit a Bragg peak in X-ray diffraction measurement. [6] The laminate according to any one of [1] to [5] above, wherein the low-reflection film includes an antifouling layer on the outermost surface opposite to the side on which the functional layer of the low-reflection film is laminated. [7] The laminate according to any one of [1] to [6] above, wherein the average luminous reflectance of the entire laminate is 0.01% or more and 1% or less, and the total light transmittance is 75% or more. [8] The laminate according to any one of [1] to [7] above, for use in a quantum dot organic EL display device. [9] A display device comprising the laminate according to any one of [1] to [8] above and a quantum dot organic EL light-emitting panel.

[10] The display device according to [9] above, wherein the low-reflection film is located on the viewing side of the functional layer.

[0008] According to the present invention, it is possible to provide a laminate that can suppress the reflective appearance caused by light reflection inside and outside the panel when displaying black, and can improve the brightness when displaying white, in a display device using a quantum dot organic EL panel.

[0009] 1 is a schematic cross-sectional view showing an example of the layer structure of a laminate of the present invention.

[0010] Hereinafter, embodiments of the present invention will be described in detail. Note that the scope of the present invention is not limited to the embodiments described here, and various modifications can be made without departing from the spirit of the present invention.

[0011] <Laminate> The laminate 1 of the present invention includes a low-reflection film and a functional layer. In the present invention, the low-reflection film is a film having an average luminous reflectance of 0.05% to 5% and a total light transmittance of 93% or more, and the functional layer is a cured film formed by curing a liquid crystalline compound and a dichroic dye in a state where the liquid crystalline compound and the dichroic dye are aligned perpendicular to the layer plane. When the laminate includes the low-reflection film and the functional layer, when the laminate is used in combination with a quantum dot organic EL (hereinafter also referred to as QD-OLED) panel for a display device, the low-reflection film can suppress external light reflection during black display, and the functional layer can absorb light reflected by the OLED electrodes, thereby reducing or preventing the occurrence of a reflective appearance during black display due to light reflection occurring within the panel. The laminate of the present invention having such a configuration does not require a circular polarizer used in conventional organic EL display devices to prevent external light reflection and light reflection at the electrodes, and therefore can achieve brightness during white display equal to or greater than that achieved when using conventional organic EL panels or liquid crystal panels.

[0012] (Low-Reflection Film) The low-reflection film constituting the laminate of the present invention refers to a film that has the effect of reducing or preventing reflectance by the light interference effect, such as a film generally called an AR film or an LR film. When the laminate is used in combination with a QD-OLED panel for a display device, the use of the low-reflection film can suppress the decrease in visibility caused by external light being reflected and reflected on the display screen during black display, leading to an improvement in the reflective appearance.

[0013] In the present invention, the average luminous reflectance of the low-reflection film is 0.05% or more and 5% or less. When the average luminous reflectance of the low-reflection film is within this range, the laminate can be imparted with sufficient external light anti-reflection function. From the viewpoint of a higher external light anti-reflection function, the average luminous reflectance of the low-reflection film is preferably 0.1% or more, more preferably 0.2% or more, and is preferably 4% or less, more preferably 3% or less, and even more preferably 2% or less. In one embodiment of the present invention, the average luminous reflectance of the low-reflection film is preferably 0.05 to 2%, more preferably 0.05 to 1%, and particularly preferably 0.05 to 0.5%. The average luminous reflectance can be calculated from the reflection spectrum obtained by irradiating the low-reflection film with light from an oblique direction using a spectrophotometer, according to the method described in JIS Z 8722. In detail, it can be measured by the method described in the Examples below.

[0014] The average luminous reflectance of the low reflection film can be controlled within the above range by the composition of the low reflection layer, its thickness, the layer structure of the low reflection film, and the like.

[0015] The low-reflection film has a total light transmittance of 93% or more. When the low-reflection film has a total light transmittance of 93% or more, it has high transparency and can capture a sufficient amount of light into a display device when incorporated into the display device, thereby forming a laminate with excellent optical properties. The low-reflection film has a total light transmittance of preferably 94% or more, more preferably 95% or more, and particularly preferably 96% or more. The upper limit of the total light transmittance is not particularly limited, and is 100% or less. The total light transmittance can be measured, for example, according to the method described in JIS K 7361. Specifically, it can be measured by the method described in the examples described below.

[0016] The total light transmittance of the low-reflection film can be controlled within the above range by the composition of the low-reflection layer, its thickness, the layer structure of the low-reflection film, and the like.

[0017] In the present invention, the low-reflection film may have a single-layer structure or a multi-layer structure, but the low-reflection film includes at least one low-reflection layer. That is, when the low-reflection film has a single-layer structure, the layer is a low-reflection layer. When the low-reflection film has a multi-layer structure, the multi-layer structure includes at least one low-reflection layer at any position, and when it includes multiple low-reflection layers, the low-reflection layers may be the same or different from each other.

[0018] The low-reflection layer is a layer having a function of reducing or preventing light reflectance by the light interference effect. Examples of the low-reflection layer include a cured resin layer containing low-refractive-index particles and a curable material, and an inorganic layer having a low-reflection function.

[0019] In a low-reflection layer consisting of a cured resin layer containing low-refractive index particles and a curable material, the low-reflection layer is preferably formed from a composition containing the curable material, low-refractive index particles, and a solvent (hereinafter also referred to as a "low-reflection layer-forming composition").

[0020] As the curable material, curable resins, active energy ray-curable compounds, etc. commonly used in the technical field can be used as long as they can form a low-reflection layer having desired properties upon curing. Among them, active energy ray-curable compounds that have the property of being cured by irradiation with active energy rays such as ultraviolet rays, electron beams, visible light, or X-rays are preferred from the viewpoints of transparency, handleability, etc. Examples of active energy ray-curable compounds include cationically polymerizable compounds and radically polymerizable compounds.

[0021] In one embodiment of the present invention, a radically polymerizable compound is preferably used as the active energy ray-curable compound forming the low-reflection layer. The radically polymerizable compound refers to a compound that undergoes a radical polymerization reaction and hardens upon irradiation with active energy rays or heating. Specific examples include (meth)acrylic compounds having one or more (meth)acryloyl groups in the molecule, as well as polyether resins, polyester resins, epoxy resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiolpolyene resins, and the like, each having an acrylate functional group. Among these, in addition to meth)acrylic compounds, compounds having an ethylenically unsaturated bond, such as vinyl compounds such as styrene, styrene sulfonic acid, vinyl acetate, vinyl propionate, and N-vinyl-2-pyrrolidone, are preferred, with (meth)acrylic compounds being more preferred. These compounds may be used alone or in combination of two or more. In this specification, (meth)acrylic refers to both acrylic and methacrylic, and (meth)acrylate refers to both acrylate and methacrylate.

[0022] The (meth)acrylic compound is a compound having at least one (meth)acryloyloxy group in the molecule, and may be a monomer, oligomer, or polymer. Examples of the (meth)acrylic compound include (meth)acrylate compounds such as monofunctional (meth)acrylate compounds and polyfunctional (meth)acrylate compounds; urethane (meth)acrylate compounds such as polyfunctional urethane (meth)acrylate compounds; epoxy (meth)acrylate compounds such as polyfunctional epoxy (meth)acrylate compounds; carboxyl group-modified epoxy (meth)acrylate compounds, polyester (meth)acrylate compounds, etc. The (meth)acrylic compound may be used alone or in combination of two or more.

[0023] Examples of the (meth)acrylate compound include a monofunctional (meth)acrylate compound having one (meth)acryloyloxy group in the molecule and a polyfunctional (meth)acrylate compound having two or more (meth)acryloyloxy groups in the molecule. From the viewpoint of increasing the crosslink density of the cured resin layer, the polyfunctional (meth)acrylate compound may be more preferable.

[0024] 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, and 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, phosphate (meth)acrylate, ethylene oxide-modified phosphate (meth)acrylate, phenoxy (meth)acrylate, ethylene oxide-modified phenoxy (meth)acrylate, propylene oxide-modified phenoxy (meth)acrylate 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, 2-hydroxy-3-phenoxypropyl (meth)acrylate, 2-(meth)acryloyloxyethyl diethyl 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)acrylate, hexafluoropropyl (meth)acrylate, octafluoropropyl (meth)acrylate, octafluoropropyl (meth)acrylate,adamantane derivative mono(meth)acrylates such as adamantyl acrylate having a monovalent mono(meth)acrylate derived from 2-adamantane and adamantanediol.

[0025] Examples of the polyfunctional (meth)acrylate compound include ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, butanediol 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, Bifunctional (meth)acrylate compounds such as di(meth)acrylates such as ricol di(meth)acrylate, polypropylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, ethoxylated neopentyl glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, and hydroxypivalic acid neopentyl glycol di(meth)acrylate; and tri(meth)acrylates such as propoxylated trimethylolpropane tri(meth)acrylate, tris-2-hydroxyethyl isocyanurate tri(meth)acrylate, and glycerin tri(meth)acrylate; trifunctional (meth)acrylate compounds such as pentaerythritol tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, and ditrimethylolpropane tri(meth)acrylate; pentaerythritol tetra(meth)acrylate, ditrimethylol Examples of the polyfunctional (meth)acrylate compound include tri- or higher functional polyfunctional (meth)acrylate compounds such as propane tetra(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, ditrimethylolpropane penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and ditrimethylolpropane hexa(meth)acrylate, as well as polyfunctional (meth)acrylate compounds in which a portion of these (meth)acrylates is substituted with an alkyl group or ε-caprolactone.

[0026] The urethane (meth)acrylate compound generally refers to a reaction product of an isocyanate compound, a polyol compound, and a (meth)acrylate compound, and is preferably a polyfunctional urethane (meth)acrylate compound having two or more (meth)acryloyloxy groups in the molecule. As the polyfunctional urethane (meth)acrylate compound, a polyfunctional urethane acrylate obtained by reacting a polyhydric alcohol, a polyhydric isocyanate, and a hydroxyl group-containing acrylate can be suitably used. Commercially available products may also be used as the polyfunctional urethane acrylate. Specific examples of such commercially available polyfunctional urethane acrylates include UA-306H, UA-306T, and UA-3061 manufactured by Kyoeisha Chemical Co., Ltd.; UV-1700B, UV-6300B, UV-7600B, UV-7605B, UV-7640B, and UV-7650B manufactured by The Nippon Synthetic Chemical Industry Co., Ltd.; and U-4HA and U- 6HA, UA-100H, U-6LPA, U-15HA, UA-32P, and U-324A, etc.; Ebecryl-1290, Ebecryl-1290K, and Ebecryl-5129, etc., manufactured by Daicel Allnex Co., Ltd.; and UN-3220HA, UN-3220HB, UN-3220HC, and UN-3220HS, etc., manufactured by Negami Chemical Industrial Co., Ltd.

[0027] The content of the curable material in the composition for forming a low-reflection layer can be appropriately determined depending on the type and combination of the curable materials used, and is, for example, preferably 10 to 80 mass%, more preferably 20 to 75 mass%, and even more preferably 30 to 70 mass%, relative to the solid content of the composition for forming a low-reflection layer. In this specification, the solid content of the composition for forming a low-reflection layer means the total amount of components excluding volatile substances such as solvents from the composition. Hereinafter, the solid content of other compositions, etc., similarly refers to the total amount of components excluding volatile substances such as solvents from the target composition, etc.

[0028] The composition for forming a low-reflection layer preferably contains low-refractive-index particles as a component for controlling the refractive index of the low-reflection layer. As the low-refractive-index particles, nanoparticles having a refractive index lower than that of the optical resin can generally be used. Specifically, for example, LiF, MgF２ , 3NaF·AlF ３ or AlF ３ (both have a refractive index of 1.4), or Na ３ AlF ６ Examples of such low refractive index particles include low refractive index particles made of low refractive index materials such as cryolite (refractive index 1.33); and low refractive index particles having voids inside the particles. In low refractive index particles having voids inside the particles, the voids can have the refractive index of air (≒1), so the low refractive index particles can have a very low refractive index. Specific examples of such low refractive index particles include low refractive index silica particles having voids inside, such as porous silica particles and silica particles having a shell structure. These may be used alone or in combination of two or more.

[0029] The particle size of the low-refractive-index particles is preferably 1 to 100 nm, more preferably 10 to 90 nm, and even more preferably 20 to 80 nm. When the particle size is equal to or less than the upper limit, light reflection due to Rayleigh scattering can be sufficiently reduced, and whitening of the low-refractive-index layer and a decrease in the transparency of the low-refractive-index film can be suppressed. When the particle size is equal to or greater than the lower limit, problems such as non-uniformity of the low-refractive-index particles in the low-refractive-index layer due to aggregation of the low-refractive-index particles are less likely to occur. Furthermore, low-refractive-index silica particles having internal voids are advantageous from the viewpoint of sufficient scratch resistance and a sufficiently low refractive index of the low-refractive-index particles. The voids in the low-refractive-index particles having internal voids are preferably 20 to 80 nm from the viewpoint of sufficient scratch resistance and a sufficiently low refractive index of the low-refractive-index particles.

[0030] The content of the low refractive index particles in the composition for forming a low reflection layer can be appropriately determined depending on the type of low refractive index particles used, etc. From the viewpoint of obtaining sufficient anti-reflection or anti-reflection function while ensuring the transparency of the low reflection film, the content of the low refractive index particles is, for example, preferably 50 to 300 parts by mass, more preferably 80 to 250 parts by mass, still more preferably 100 to 200 parts by mass, and particularly preferably 120 to 180 parts by mass relative to 100 parts by mass of the curable material contained in the composition for forming a low reflection layer.

[0031] The solvent used in the composition for forming a low-reflection layer can be selected from known solvents commonly used in the field in accordance with the type of curable material and low refractive index particles used, the thickness of the low-reflection layer, the configuration of the layer on which the low-reflection layer is formed, and the like. Specific examples of the solvent include alcohol solvents such as methanol, ethanol, ethylene glycol, isopropyl alcohol, propylene glycol, ethylene glycol methyl ether, ethylene glycol butyl ether, and propylene glycol monomethyl ether; ester solvents such as ethyl acetate, butyl acetate, ethylene glycol methyl ether acetate, γ-butyrolactone or propylene glycol methyl ether acetate, and ethyl lactate; ketone solvents such as acetone, methyl ethyl ketone, cyclopentanone, cyclohexanone, 2-heptanone, and methyl isobutyl ketone; aliphatic hydrocarbon solvents such as pentane, hexane, and heptane; aromatic hydrocarbon solvents such as toluene and xylene, and nitrile solvents such as acetonitrile; ether solvents such as tetrahydrofuran and dimethoxyethane; chlorine-containing solvents such as chloroform and chlorobenzene; amide-based solvents such as N,N-dimethylacetamide and N,N-dimethylformamide; sulfur-containing solvents such as dimethyl sulfone, dimethyl sulfoxide, and sulfolane; carbonate-based solvents such as ethylene carbonate and propylene carbonate; and pyrrolidone-based solvents such as N-methylpyrrolidone. These solvents may be used alone or in combination of two or more.

[0032] The content of the solvent in the composition for forming a low-reflection layer can be appropriately determined depending on the desired viscosity of the composition for forming a low-reflection layer, the thickness of the low-reflection layer to be produced, etc. From the viewpoint of handleability, coatability, etc., the content is, for example, preferably 50 to 99 parts by mass, more preferably 70 to 98 parts by mass, and even more preferably 80 to 97 parts by mass, relative to 100 parts by mass of the composition for forming a low-reflection layer. Therefore, the solid content per 100 parts by mass of the composition for forming a low-reflection layer is preferably 1 to 50 parts by mass.

[0033] The composition for forming a low-reflection layer may contain, in addition to the curable material, low-refractive-index particles, and solvent, other components commonly used to form a low-reflection layer, such as a silicone-based material, a polymerization initiator, a leveling agent, a colorant, an antioxidant, and a dispersant.

[0034] When a silicone-based material is added to the composition for forming a low-reflection layer, the low-reflection layer can also have antifouling properties.As such a silicone-based material, silicone oil or modified silicone oil can be used, and preferably alkylaralkyl-modified silicone oil, alkyl-modified silicone oil, polyether-modified silicone oil, or alkylpolyether-modified silicone oil is used.As the silicone-based material, an organosilicon compound that does not contain fluorine and does not have a (meth)acrylic group can also be used.Specific examples thereof include alkylalkoxysilane compounds, silane siloxane compounds, silane compounds containing polyester groups, silane compounds having polyether groups, and siloxane compounds.The silicone-based material can be used alone or in combination of two or more.

[0035] When the composition for forming a low-reflection layer contains a silicone-based material, the content thereof is, for example, preferably 1 to 20 parts by mass, more preferably 3 to 15 parts by mass, relative to 100 parts by mass of the curable material contained in the composition for forming a low-reflection layer.

[0036] The composition for forming a low-reflection layer may contain a polymerization initiator depending on the type of curable material used, the type of active energy ray, etc. When ultraviolet light or visible light is used as the active energy ray, a photopolymerization initiator is typically used as the polymerization initiator. Examples of photopolymerization initiators include acetophenones, benzoins, benzophenones, phosphine oxides, ketals, anthraquinones, and thioxanthones. More specifically, examples include the same polymerization initiators as those exemplified as those that can be contained in the composition for forming a functional layer described below. The polymerization initiators may be used alone or in combination of two or more. The photopolymerization initiator may also be used in combination with a dye sensitizer. Examples of dye sensitizers include xanthene, thioxanthene, coumarin, ketocoumarin, and combinations of two or more thereof. On the other hand, when electron beams or gamma rays are used as the active energy ray, a polymerization initiator is not necessary.

[0037] When a photopolymerization initiator is used, the content thereof is preferably 1 to 20 parts by mass, more preferably 3 to 15 parts by mass, relative to 100 parts by mass of the curable material contained in the composition for forming a low reflection layer.

[0038] The composition for forming a low-reflection layer may contain a leveling agent depending on the type of curable material used, the type of active energy ray, etc. Preferred examples of the leveling agent include organically modified polysiloxanes, which can be used alone or in combination of two or more. Specific examples of organically modified polysiloxanes include polydimethylsiloxanes having polyether-modified acrylic groups, polydimethylsiloxanes having polyester-modified acrylic groups, polydimethylsiloxanes having polyether-modified hydroxyl groups, and aralkyl-modified polymethylalkylsiloxanes.

[0039] By adding an organically modified polysiloxane to the composition for forming a low-reflection layer, the surface tension can be reduced during the drying process of the composition for forming a low-reflection layer. When an organically modified polysiloxane is used, the amount thereof is, for example, 0.1 to 2.0 mass % relative to the total mass of the composition for forming a low-reflection layer.

[0040] The low-reflection layer can be formed, for example, by a method comprising applying a composition for forming a low-reflection layer to a surface on which the low-reflection layer is to be formed to form a coating film, drying the coating film, and then irradiating the dried coating film with active energy rays. The surface on which the low-reflection layer is to be formed is a layer adjacent to the low-reflection layer in the low-reflection film or the laminate of the present invention containing the low-reflection film, and may be, for example, a substrate or a hard coat layer described below.

[0041] Examples of methods for applying the composition for forming a low reflection layer include known methods such as coating methods such as spin coating, extrusion, gravure coating, die coating, bar coating, and applicator methods, and printing methods such as flexography.

[0042] Methods for drying and removing the solvent contained in the composition for forming a low-reflection layer include natural drying, ventilation drying, heat drying, and reduced-pressure drying. The temperature when drying the coating film is, for example, preferably ±30°C, more preferably ±20°C, of ​​the boiling point of the solvent contained in the composition for forming a low-reflection layer. When the drying temperature is within the above range, the solvent is less likely to remain in the obtained low-reflection layer.

[0043] By irradiating the coating film with active energy rays, such as electron beams or ultraviolet rays, a cured resin layer having low reflection function can be obtained as a low-reflection layer. Examples of light sources for active energy rays include low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, ultra-high-pressure mercury lamps, xenon lamps, halogen lamps, carbon arc lamps, tungsten lamps, gallium lamps, excimer lasers, LED light sources emitting light in the wavelength range of 380 to 440 nm, chemical lamps, black light lamps, microwave-excited mercury lamps, and metal halide lamps. Examples of devices for generating electron beams include various electron beam accelerators such as Cockcroft-Wald type, Van de Graaff type, resonant transformer type, insulating core transformer type, linear type, dynamitron type, and high-frequency type.

[0044] The cumulative light amount of the active energy rays to be irradiated may be appropriately determined depending on the composition of the low reflection layer-forming composition. ２ is.

[0045] The thickness of the low-reflection layer made of a cured resin layer is not particularly limited, but may be, for example, 0.01 to 10 μm, preferably 0.05 to 8 μm, and more preferably 0.1 to 5 μm. The thickness of the low-reflection layer can be measured using a laser microscope, a film thickness meter, or the like. The same applies hereinafter to other layers such as functional layers and substrates that constitute the laminate of the present invention.

[0046] In the present invention, the low reflection layer may be an inorganic layer having a low reflection function. Examples of inorganic layers having a low reflection function include aluminum, silver, copper, rhodium, titanium, platinum, cobalt, copper aluminum (AlCu), and magnesium fluoride (MgF ２ The inorganic layer having a low reflection function can be formed by a method including a step of sputtering or chemical vapor deposition of one or more metal materials selected from the group consisting of: Specific examples of the inorganic layer having a low reflection function include low refractive index layers such as those described in JP-A-2017-191285, and can be produced by the method described therein.

[0047] The refractive index of the low-reflection layer is preferably 1.0 to 1.5, more preferably 1.0 to 1.45, and particularly preferably 1.0 to 1.4. When the refractive index is within this range, the low-reflection layer can exhibit higher anti-reflection performance. The refractive index of the low-reflection layer can be controlled within this range by adjusting the composition of the composition constituting the low-reflection layer and / or the thickness of the low-reflection layer.

[0048] In the present invention, the low-reflection film may have a multilayer structure and may include layers other than the low-reflection layer. Examples of other layers that can constitute the low-reflection film include a substrate, a hard coat layer, an antifouling layer, and an adhesive layer. The layer structure of the multilayer low-reflection film is not particularly limited, but for example, in one embodiment of the present invention, the low-reflection film includes a low-reflection layer and a substrate.

[0049] The substrate that can be used to form low-reflection film can be, for example, the resin film that is conventionally known in the field of optical film.The resin that forms the substrate film can be, for example, polyolefin such as polyethylene, polypropylene and norbornene-based polymer; cyclic olefin-based resin; polyvinyl alcohol; polyester such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate; polymethacrylic acid ester; polyacrylic acid ester; cellulose-based resin such as triacetyl cellulose, diacetyl cellulose and cellulose acetate propionate; polycarbonate; polysulfone; polyethersulfone; polyetherketone; fluorine-based resin such as polyurethane, polytetrafluoroethylene; vinyl compound such as polyvinyl chloride; vinylidene compound such as polyvinylidene chloride; copolymer of vinyl compound or fluorine-based compound such as vinylidene fluoride / trifluoroethylene copolymer, ethylene / vinyl acetate copolymer; plastic such as polyphenylene sulfide and polyphenylene oxide. Among these, from the viewpoint of smoothness and quality as a coating substrate, at least one selected from cellulose-based resins, cyclic olefin-based resins, and polyethylene terephthalate resins is preferred, and cellulose-based resins and cyclic olefin-based resins are more preferred. These may be used alone or in combination of two or more. Such resins can be formed into a resin film by known means such as solvent casting or melt extrusion. Furthermore, commercially available substrate films commonly used in the field of optical films may be used as the substrate film.

[0050] The thickness of the substrate is not particularly limited, but from the viewpoint of reducing the thickness of the low reflection film and the ease of handling of the substrate, the thickness of the substrate is usually 10 to 200 μm, preferably 15 to 100 μm.

[0051] In order to easily impart the desired releasability and adhesion to the substrate surface, the substrate surface may be subjected to a modification treatment such as corona treatment, plasma treatment, or flame treatment depending on the configuration of the adjacent layer, etc. The release-treated substrate can be used as a release film and as a layer (surface) on which a low-reflection layer is formed (laminate).

[0052] The low-reflection film may include a hard coat layer. The inclusion of a hard coat layer leads to an improvement in the surface hardness of the surface on which the hard coat layer is laminated and an improvement in the mechanical strength of the low-reflection film. The hard coat layer can be provided at any position on the low-reflection film, but when the low-reflection film includes a substrate and a hard coat layer, it is preferable that the hard coat layer be adjacent to the substrate and the low-reflection layer be adjacent to the hard coat layer.

[0053] The hard coat layer included in the low-reflection film may be, for example, a cured layer of an active energy ray-curable resin. The cured layer of the active energy ray-curable resin may be formed, for example, from a composition containing an active energy ray-curable compound, a solvent, and, if necessary, a polymerization initiator and various additives. The active energy ray-curable compound, solvent, and polymerization initiator may be appropriately selected from the compounds, components, and materials exemplified as those contained in the low-reflection layer-forming composition described above, as well as the materials exemplified as components of the diffusion prevention layer-forming curable composition described below. Examples of various additives include leveling agents (surface conditioners), refractive index adjusters, adhesion improvers, curing agents, and antistatic agents (e.g., metal oxide fine particles such as antimony-doped tin oxide, indium oxide tin oxide, tin oxide, titanium oxide, and antimony pentoxide, quaternary ammonium salts, and conductive polymers).

[0054] The hard coat layer can be prepared by the same procedure as the low-reflection layer, which is a cured resin layer.That is, it can be formed by the method comprising: coating a composition comprising an active energy ray curable compound, a solvent, and if necessary, a polymerization initiator and various additives on the surface on which the hard coat layer is to be formed to form a coating film, drying this coating film, and then irradiating the coating film with active energy rays.The method and conditions for applying the composition, drying and irradiating the active energy rays can be the same as those for forming the low-reflection layer, and can be appropriately selected according to the composition of the composition for forming the hard coat layer, the thickness of the hard coat layer, etc.

[0055] The thickness of the hard coat layer is not particularly limited, but from the viewpoint of mechanical strength and thinning of the low reflection film, it is usually 0.1 to 50 μm, preferably 0.5 to 20 μm, and more preferably 1 to 10 μm.

[0056] The low-reflection film may include an antifouling layer. The antifouling layer is a layer that exhibits a function of preventing contamination from the surroundings, such as water repellency, oil repellency, sweat resistance, antifouling, or fingerprint resistance. The antifouling layer can also improve the slipperiness of the surface.

[0057] The antifouling layer may be any layer commonly used in the art. Specifically, the material for forming the antifouling layer may be either an organic compound or an inorganic compound. Examples of materials that provide high water and oil repellency include fluorine-containing organic compounds and organosilicon compounds. Examples of fluorine-containing organic compounds include fluorocarbons, perfluorosilanes, and polymeric compounds thereof. From the viewpoint of easily enhancing the effect of preventing stain adhesion, a material that provides a contact angle of the antifouling layer surface with pure water of 90 degrees or more, and even 100 degrees or more, is preferred. Depending on the material to be formed, the antifouling layer may be formed using physical vapor deposition, typically vapor deposition or sputtering, chemical vapor deposition, wet coating, or the like.

[0058] The thickness of the antifouling layer is not particularly limited, and is usually about 1 to 50 nm, preferably 3 to 35 nm.

[0059] The low-reflection film may include a pressure-sensitive adhesive layer at any position other than the outermost layer. The pressure-sensitive adhesive layer is a layer formed of an adhesive or a pressure-sensitive adhesive. In the present invention, the pressure-sensitive adhesive layer may be formed of, for example, an adhesive having a storage modulus of 1.0×10 at 25° C. measured under the following conditions using a dynamic viscoelasticity measuring device. ７ Pa or more, and ８ The pressure-sensitive adhesive preferably has a storage modulus of 1.0×10 Pa or more at 25° C. as measured under the following conditions using a dynamic viscoelasticity measuring device. ３ Pa ~ 1.0 x 10 ６Examples of the agent include an agent having a viscosity of 100 Pa or more. Sample dimensions: width 10 mm, length 30 mm Clamp distance: 20 mm Measurement mode: tension Frequency: 1 Hz Heating rate: 5°C / min

[0060] The thickness of the pressure-sensitive adhesive layer formed by the adhesive is not particularly limited, but is preferably 0.01 to 3 μm, more preferably 0.05 to 2 μm. The thickness of the pressure-sensitive adhesive layer formed by the pressure-sensitive adhesive is not particularly limited, but is preferably 5 to 100 μm, more preferably 5 to 25 μm.

[0061] The adhesive or pressure-sensitive adhesive may be one commonly used in the art, and such adhesives or pressure-sensitive adhesives are commercially available. For example, a thermosetting or photocurable resin composition may be applied to an adjacent layer or film by a conventionally known method (e.g., a method using a known tool such as a roll coater), and then another adjacent layer or film may be placed on top of the adhesive or pressure-sensitive adhesive. The adhesive layer may also be a pressure-sensitive adhesive (PSA), which is a layer that is attached to an object by pressing. The pressure-sensitive adhesive may be a pressure-sensitive adhesive that is "a substance that is sticky at room temperature and adheres to an adherend with light pressure" (JIS K 6800), or it may be a capsule-type adhesive that is "an adhesive in which a specific component is contained in a protective coating (microcapsules) and that can maintain stability until the coating is destroyed by appropriate means (pressure, heat, etc.)" (JIS K 6800).

[0062] The layer structure of the low-reflection film is not particularly limited as long as it satisfies the average luminous reflectance and total light transmittance required for the low-reflection film of the present invention. For example, it may consist of a single low-reflection layer, or it may have a multilayer structure including a low-reflection layer and other layers such as a substrate. A low-reflection film including a low-reflection layer and a substrate can be obtained, for example, by forming a low-reflection layer on a substrate according to the low-reflection layer preparation method described above. When the low-reflection film has layers other than the substrate, or when it includes multiple low-reflection layers, these layers can be further formed in desired positions to obtain a low-reflection film including the low-reflection layer, the substrate, and these other layers. Specifically, for example, a hard coat layer can be formed on the substrate, and then a low-reflection layer can be further formed on the hard coat layer to obtain a low-reflection film consisting of a substrate / hard coat layer / low-reflection layer. An antifouling layer may also be formed on the outermost surface of the low-reflection film. Each layer can be formed directly on the adjacent layer in the low-reflection film, or, for example, layers formed individually on a release film can be laminated via an adhesive, or these methods can be combined. Alternatively, a peelable substrate (release film) may be used as the substrate, and a low-reflection layer or other layers may be formed on the substrate, followed by peeling off the substrate to obtain a low-reflection film consisting of a single-layer low-reflection layer or a multilayer low-reflection film that does not include a substrate. Furthermore, a single-layer low-reflection layer (low-reflection film) may be obtained by forming a low-reflection layer directly on the surface where the low-reflection layer is to be formed (for example, on the functional layer or anti-diffusion layer that constitutes the laminate of the present invention). Alternatively, a commercially available product commonly used in the field of optical films may be used as the low-reflection film.

[0063] The thickness of the low-reflection film may be appropriately determined depending on the layer structure of the low-reflection film, the configuration of the QD-OLED panel display device into which it is incorporated, and other factors. The thickness of the low-reflection film may be, for example, 0.05 to 500 μm, preferably 0.1 to 300 μm, more preferably 0.1 to 200 μm, and even more preferably 0.1 to 100 μm. In the laminate of the present invention, layers necessary for ensuring, maintaining, and / or reinforcing the function of the low-reflection layer, as well as layers formed integrally with the low-reflection layer, specifically, for example, a substrate for forming and maintaining the low-reflection layer, a hard coat layer adjacent to or close to the low-reflection layer, an antifouling layer, and adhesive layers for bonding these layers, are considered to be components constituting the low-reflection film. On the other hand, in the present invention, adhesive layers for bonding the low-reflection film to other layers such as functional layers are not generally considered to be components of the low-reflection film. Therefore, for example, when considering a low-reflection film in which a low-reflection layer is formed on a substrate and which is provided with a hard coat layer, an antifouling layer, etc., the average luminous reflectance, total light transmittance, and thickness of the low-reflection film mean values ​​measured as a film with a multilayer structure including the substrate, the low-reflection layer, the hard coat layer, and the antifouling layer.

[0064] The refractive index of the low-reflection film is preferably 1.0 to 1.5, more preferably 1.0 to 1.3, and particularly preferably 1.0 to 1.2. When the refractive index is within this range, the low-reflection film can exhibit higher anti-reflection performance. The refractive index of the low-reflection film can be controlled within this range by adjusting the composition of the materials constituting the low-reflection film and / or the thickness of the low-reflection film and / or the layer structure of the low-reflection film.

[0065] (Functional Layer) In the laminate of the present invention, the functional layer is a cured film formed by curing a liquid crystal compound and a dichroic dye in a state where they are aligned perpendicular to the layer plane. In display devices using a QD-OLED panel containing quantum dots, which are nanoparticles, external light taken into the display device is reflected by the OLED electrode during black display. This reflected light is scattered by the light diffusing agent in the QD filter, causing the reflected light to appear whitish on the panel, a phenomenon that occurs specifically when using a quantum dot organic EL panel. The functional layer, a so-called vertically aligned liquid crystal cured film formed by curing a liquid crystal compound and a dichroic dye in a state where they are aligned perpendicular to the film plane, functions to absorb light reflected by the OLED electrode, thereby suppressing the phenomenon where reflected light appears whitish on the panel during black display. This leads to improved reflective appearance. The laminate of the present invention may include one functional layer or two or more functional layers. When two or more functional layers are included, they may be the same or different.

[0066] The functional layer can be formed from a liquid crystal composition containing a liquid crystal compound and a dichroic dye. In the present invention, the liquid crystal compound contained in the liquid crystal composition forming the functional layer (hereinafter also referred to as the "composition for forming the functional layer") is preferably a polymerizable liquid crystal compound. The polymerizable liquid crystal compound is a compound having at least one polymerizable group and liquid crystallinity. Here, the polymerizable group refers to a group that participates in a polymerization reaction, and is preferably a photopolymerizable group. The photopolymerizable group refers to a group that can participate in a polymerization reaction by an active radical generated from a polymerization initiator or an acid. Examples of polymerizable groups contained in the liquid crystal compound include a vinyl group, a vinyloxy group, a 1-chlorovinyl group, an isopropenyl group, a 4-vinylphenyl group, an acryloyloxy group, a methacryloyloxy group, an oxiranyl group, and an oxetanyl group. Among these, a radically polymerizable group is preferred, an acryloyloxy group, a methacryloyloxy group, a vinyloxy group, an oxiranyl group, and an oxetanyl group are more preferred, and an acryloyloxy group is even more preferred.

[0067] In the present invention, the liquid crystallinity of the liquid crystal compound may be thermotropic or lyotropic, but thermotropic liquid crystal is preferred from the viewpoint of compatibility with dichroic dyes.In addition, the phase order structure of the thermotropic liquid crystal may be, for example, nematic liquid crystal, smectic liquid crystal, or discotic liquid crystal, and among these, thermotropic liquid crystal compounds showing smectic liquid crystal phase and thermotropic liquid crystal compounds showing nematic liquid crystal phase are preferred.As these liquid crystal compounds, liquid crystal compounds generally used in the field of optical films can be appropriately selected and used as long as they can form a functional layer having the desired properties to achieve the effects of the present invention.

[0068] Examples of liquid crystal compounds that can form the functional layer include compounds represented by the following formula (A) (hereinafter also referred to as "liquid crystal compound (A)"). １１ -V １１ -W １１ -(X １１ -Y １１ ) ｎ -X １２ -W １２ -V １２ -U １２ (A) [In formula (A), X １１ and X １２ represent, independently of each other, a divalent aromatic group or a divalent alicyclic hydrocarbon group, wherein a hydrogen atom contained in the divalent aromatic group or divalent alicyclic hydrocarbon group may be substituted with a halogen atom, an alkyl group having 1 to 4 carbon atoms, a fluoroalkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cyano group, or a nitro group, and a carbon atom constituting the divalent aromatic group or divalent alicyclic hydrocarbon group may be substituted with an oxygen atom, a sulfur atom, or a nitrogen atom. １ and X ２ At least one of Y is an optionally substituted 1,4-phenylene group or an optionally substituted cyclohexane-1,4-diyl group. １１ is a single bond or a divalent linking group. n is 1 to 3, and when n is 2 or more, a plurality of X １may be the same or different. １２ is multiple X １ In addition, when n is 2 or more, a plurality of Y １１ may be the same or different. From the viewpoint of liquid crystal properties, n is preferably 2 or more. １１ represents a hydrogen atom or a polymerizable group. １２ represents a polymerizable group. １１ and W １２ are each independently a single bond or a divalent linking group. １１ and V １２ each independently represents an alkanediyl group having 1 to 20 carbon atoms which may have a substituent, and —CH ２ - may be replaced by -O-, -CO-, -S- or -NH-.]

[0069] In the liquid crystal compound (A), X １１ and X １２ are each independently preferably an optionally substituted 1,4-phenylene group or an optionally substituted cyclohexane-1,4-diyl group, and X １１ and X １２ At least one of the groups is an optionally substituted 1,4-phenylene group or an optionally substituted cyclohexane-1,4-diyl group, and is preferably a trans-cyclohexane-1,4-diyl group. The optionally substituted 1,4-phenylene group or the optionally substituted cyclohexane-1,4-diyl group may optionally have an alkyl group having 1 to 4 carbon atoms, such as a methyl group, an ethyl group, or a butyl group; a cyano group; and a halogen atom, such as a chlorine atom or a fluorine atom. An unsubstituted group is preferred.

[0070] The liquid crystal compound (A) is a compound represented by the formula (A1): -(X １１ -Y １１ ) ｎ -X １２ - (A1) [wherein, X １１ , Y１１ , X １２ and n have the same meanings as above.] [hereinafter also referred to as partial structure (A1)] has an asymmetric structure, the liquid crystal compound (A) is likely to exhibit smectic liquid crystallinity, particularly high-order smectic liquid crystallinity. Examples of the liquid crystal compound (A) having an asymmetric structure of partial structure (A1) include a compound in which n is 1 and one X １１ and X １２ and Y are different from each other. １１ are the same structure, and two X １１ have the same structure, and one X １２ is these two X １１ a liquid crystal compound (A) having a structure different from that of two X １１ Our W １１ X binds to １１ But the other X １１ and X １２ The other X １１ and X １２ Furthermore, the liquid crystal compound (A) may be a compound in which n is 3 and three Y １１ are the same structure, and three X １１ and one X １２ The liquid crystal compound (A) may be any one of the following compounds, each of which has a structure different from all of the other three compounds:

[0071] Y １１ is -CH ２ CH ２ -, -CH ２ O-, -CH ２ CH ２ O-, -COO-, -OCOO-, single bond, -N=N-, -CR ａ =CR ｂ -, -C≡C-, -CR ａ ═N— or —CO—NR ａ - is preferred. ａ and R ｂ are each independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. １１ is -CH ２ CH ２ -, -CH２ O-, -COO-, -OCOO-, single bond, -N=N-, -CR ａ =CR ｂ -, -C≡C- or -CR ａ ═N— is more preferred, and —CH ２ CH ２ -, -COO-, -CH ２ More preferably, it is O— or a single bond, and a plurality of Y １１ If there exists X １２ Y bonded to １１ Ga-CH ２ CH ２ - or -CH ２ O- and X １２ Y that does not bond with １１ Ga-CH ２ CH ２ More preferably, X is —, —COO—, or a single bond. １１ and X １２ When all of Y are the same structure, two or more Y １１ It is preferable that there are plural Y １１ When the compound has an asymmetric structure, smectic liquid crystallinity, particularly high-order smectic liquid crystallinity, tends to be easily exhibited.

[0072] U １２ is a polymerizable group. １１ is a hydrogen atom or a polymerizable group, preferably a polymerizable group. １１ and U １２ Preferably, both are polymerizable groups, more preferably both are photopolymerizable groups, and even more preferably both are photoradical polymerizable groups. Examples of the polymerizable group include the same groups as those exemplified above as the polymerizable group possessed by the liquid crystal compound. １１ and a polymerizable group represented by U １２ may be different from each other, but are preferably the same type of group, and １１ and U １２Preferably, at least one of the groups is a (meth)acryloyloxy group, more preferably both are (meth)acryloyloxy groups, and even more preferably both are acryloyloxy groups. The polymerizable group may be in a polymerized state or an unpolymerized state, but is preferably in an unpolymerized state.

[0073] V １１ and V １２ Examples of the alkanediyl group represented by the formula (V) include a methylene group, an ethylene group, a propane-1,3-diyl group, a butane-1,3-diyl group, a butane-1,4-diyl group, a pentane-1,5-diyl group, a hexane-1,6-diyl group, a heptane-1,7-diyl group, an octane-1,8-diyl group, a decane-1,10-diyl group, a tetradecane-1,14-diyl group, and an icosane-1,20-diyl group. １１ and V １２ is preferably an alkanediyl group having 2 to 12 carbon atoms, and more preferably an alkanediyl group having 6 to 12 carbon atoms.

[0074] Examples of the substituent that the alkanediyl group may optionally have include a cyano group and a halogen atom such as a chlorine atom or a fluorine atom. However, the alkanediyl group is preferably unsubstituted, and more preferably an unsubstituted linear alkanediyl group.

[0075] W １１ and W １２ are each independently preferably a single bond, —O—, —S—, —COO— or —OCOO—, more preferably a single bond or —O—.

[0076] Specific examples of the liquid crystal compound (A) include compounds represented by the following formulae (A-1) to (A-25): When the liquid crystal compound (A) has a cyclohexane-1,4-diyl group, the cyclohexane-1,4-diyl group is preferably a trans isomer.

[0077]

[0078]

[0079]

[0080] Among these, at least one selected from the group consisting of compounds represented by formula (A-2), formula (A-3), formula (A-4), formula (A-6), formula (A-7), formula (A-8), formula (A-13), formula (A-14) and formula (A-15) is preferred.

[0081] The liquid crystal compound (A) can be produced by a known method, for example, as described in Lub et al., Recl. Trav. Chim. Pays-Bas, 115, 321-328 (1996) or Japanese Patent No. 4719156.

[0082] Further, examples of the liquid crystal compound that can constitute the functional layer include a compound represented by the following formula (B) (hereinafter also referred to as "liquid crystal compound (B)"): １ -E １ - (B １ -G １ ) ｋ -L １ -Ar-L ２ - (G ２ -B ２ )-E ２ -P ２ (B)

[0083] In formula (B), Ar represents a divalent group having an aromatic group which may have a substituent. Examples of the aromatic group include the groups exemplified by (Ar-1) to (Ar-23) described below. Ar may also have two or more aromatic groups. The aromatic group may contain at least one of a nitrogen atom, an oxygen atom, and a sulfur atom. When Ar contains two or more aromatic groups, the two or more aromatic groups may be bonded to each other via a divalent bonding group such as a single bond, -CO-O-, or -O-.

[0084] In formula (B), G １ and G ２each independently represents a divalent aromatic group or a divalent alicyclic hydrocarbon group, wherein a hydrogen atom contained in the divalent aromatic group or divalent alicyclic hydrocarbon group may be substituted with a halogen atom, an alkyl group having 1 to 4 carbon atoms, a fluoroalkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cyano group, or a nitro group, and a carbon atom constituting the divalent aromatic group or divalent alicyclic hydrocarbon group may be substituted with an oxygen atom, a sulfur atom, or a nitrogen atom.

[0085] In formula (B), L １ , L ２ , B １ and B ２ are each independently a single bond or a divalent linking group.

[0086] In formula (B), k and l each independently represent an integer of 0 to 3, and satisfy the relationship 1≦k+l. Here, when 2≦k+l, B １ and B ２ , G １ and G ２ may be the same as or different from each other.

[0087] In formula (B), E １ and E ２ each independently represents an alkanediyl group having 1 to 17 carbon atoms, and more preferably an alkanediyl group having 4 to 12 carbon atoms. In addition, a hydrogen atom contained in the alkanediyl group may be substituted with a halogen atom, and —CH ２ - may be substituted by -O-, -S-, or -C(=O)-.

[0088] In formula (B), P １ and P ２ each independently represents a polymerizable group or a hydrogen atom, and at least one of them is a polymerizable group.

[0089] G １ and G ２are each independently preferably a 1,4-phenylenediyl group which may be substituted with at least one substituent selected from the group consisting of a halogen atom and an alkyl group having 1 to 4 carbon atoms, or a 1,4-cyclohexanediyl group which may be substituted with at least one substituent selected from the group consisting of a halogen atom and an alkyl group having 1 to 4 carbon atoms, more preferably a 1,4-phenylenediyl group substituted with a methyl group, an unsubstituted 1,4-phenylenediyl group, or an unsubstituted 1,4-trans-cyclohexanediyl group, and particularly preferably an unsubstituted 1,4-phenylenediyl group or an unsubstituted 1,4-trans-cyclohexanediyl group. １ and G ２ At least one of L is preferably a divalent alicyclic hydrocarbon group. １ or L ２ G binds to １ and G ２ It is more preferable that at least one of the groups is a divalent alicyclic hydrocarbon group.

[0090] L １ and L ２ are each independently preferably a single bond, an alkylene group having 1 to 4 carbon atoms, —O—, —S—, or —R ａ１ OR ａ２ -, -R ａ３ COOR ａ４ -, -R ａ５ OCOR ａ６ -, -R ａ７ OC=OOR ａ８ -, -N=N-, -CR ｃ =CR ｄ - or -C≡C-, where R ａ１ ~R ａ８ each independently represents a single bond or an alkylene group having 1 to 4 carbon atoms; R ｃ and R ｄ represents an alkyl group having 1 to 4 carbon atoms or a hydrogen atom. １ and L ２ are each independently preferably a single bond, -OR ａ２－１ -, -CH ２ -, -CH ２ CH ２-, -COOR ａ４－１ - or -OCOR ａ６－１ -, where R ａ２－１ , R ａ４－１ , R ａ６－１ are each independently a single bond, —CH ２ -, -CH ２ CH ２ - represents either １ and L ２ are each independently more preferably a single bond, —O—, or —CH ２ CH ２ -, -COO-, -COOCH ２ CH ２ - or -OCO-.

[0091] B １ and B ２ are each independently preferably a single bond, an alkylene group having 1 to 4 carbon atoms, —O—, —S—, or —R ａ９ OR ａ１０ -, -R ａ１１ COOR ａ１２ -, -R ａ１３ OCOR ａ１４ - or -R ａ１５ OC=OOR ａ１６ -, where R ａ９ ~R ａ１６ each independently represents a single bond or an alkylene group having 1 to 4 carbon atoms. １ and B ２ are each independently preferably a single bond, -OR ａ１０－１ -, -CH ２ -, -CH ２ CH ２ -, -COOR ａ１２－１ - or -OCOR ａ１４－１ -, where R ａ１０－１ , R ａ１２－１ , R ａ１４－１ are each independently a single bond, —CH ２ -, -CH ２ CH ２ - represents either. １ and B ２ are each independently more preferably a single bond, —O—, or —CH ２ CH ２-, -COO-, -COOCH ２ CH ２ -, -OCO-, or -OCOCH ２ CH ２ - is.

[0092] From the viewpoint of exhibiting reverse wavelength dispersion, k and l are preferably in the range of 2≦k+l≦6, preferably k+l=4, and more preferably k=2 and l=2. When k=2 and l=2, a symmetrical structure is obtained, which is preferable.

[0093] P １ or P ２ Examples of the polymerizable group represented by the formula (I) include an epoxy group, a vinyl group, a vinyloxy group, a 1-chlorovinyl group, an isopropenyl group, a 4-vinylphenyl group, a (meth)acryloyl group, a (meth)acryloyloxy group, an oxiranyl group, and an oxetanyl group. Among these, a (meth)acryloyloxy group, a (meth)acryloyl group, a vinyl group, and a vinyloxy group are preferred, and a (meth)acryloyloxy group is more preferred.

[0094] Ar preferably has at least one selected from an aromatic hydrocarbon ring which may have a substituent, an aromatic heterocyclic ring which may have a substituent, and an electron-withdrawing group. Examples of the aromatic hydrocarbon ring include a benzene ring, a naphthalene ring, and an anthracene ring, with a benzene ring and a naphthalene ring being preferred. Examples of the aromatic heterocyclic ring include a furan ring, a benzofuran ring, a pyrrole ring, an indole ring, a thiophene ring, a benzothiophene ring, a pyridine ring, a pyrazine ring, a pyrimidine ring, a triazole ring, a triazine ring, a pyrroline ring, an imidazole ring, a pyrazole ring, a thiazole ring, a benzothiazole ring, a thienothiazole ring, an oxazole ring, a benzoxazole ring, and a phenanthroline ring. Among these, a thiazole ring, a benzothiazole ring, or a benzofuran ring is preferred, and a benzothiazole ring is even more preferred. Furthermore, when Ar contains a nitrogen atom, it is preferred that the nitrogen atom has π electrons.

[0095] In formula (X), the total number of π electrons possessed by the group represented by Ar is N πis usually 6 or more, preferably 8 or more, more preferably 10 or more, even more preferably 14 or more, and particularly preferably 16 or more. It is also preferably 36 or less, more preferably 32 or less, even more preferably 26 or less, and particularly preferably 24 or less.

[0096] Examples of the aromatic group contained in Ar include the following groups.

[0097]

[0098] In formula (Ar-1) to formula (Ar-23), * represents a linking moiety, Z ０ , Z １ and Z ２ each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 12 carbon atoms, a cyano group, a nitro group, an alkylsulfinyl group having 1 to 12 carbon atoms, an alkylsulfonyl group having 1 to 12 carbon atoms, a carboxyl group, a fluoroalkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an alkylthio group having 1 to 12 carbon atoms, an N-alkylamino group having 1 to 12 carbon atoms, an N,N-dialkylamino group having 2 to 12 carbon atoms, an N-alkylsulfamoyl group having 1 to 12 carbon atoms, or an N,N-dialkylsulfamoyl group having 2 to 12 carbon atoms. ０ , Z １ and Z ２ may contain a polymerizable group.

[0099] In formulas (Ar-1) to (Ar-23), Q １ and Q ２ are each independently -CR ２’ R ３’ -, -S-, -NH-, -NR ２’ represents -, -CO- or -O-; R ２’ and R ３’ each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.

[0100] In formulas (Ar-1) to (Ar-23), J １ and J. ２ each independently represents a carbon atom or a nitrogen atom.

[0101] In formulas (Ar-1) to (Ar-23), Y １ , Y ２ each independently represents an optionally substituted aromatic hydrocarbon group or an optionally substituted aromatic heterocyclic group.

[0102] In formulas (Ar-1) to (Ar-23), W １ and W ２ each independently represents a hydrogen atom, a cyano group, a methyl group or a halogen atom; and m represents an integer of 0 to 6.

[0103] Y １ , Y ２ Examples of the aromatic hydrocarbon group in the formula (I) include aromatic hydrocarbon groups having 6 to 20 carbon atoms, such as a phenyl group, a naphthyl group, an anthryl group, a phenanthryl group, and a biphenyl group, with a phenyl group and a naphthyl group being preferred, and a phenyl group being more preferred. Examples of the aromatic heterocyclic group include aromatic heterocyclic groups having 4 to 20 carbon atoms and containing at least one heteroatom, such as a nitrogen atom, an oxygen atom, or a sulfur atom, such as a furyl group, a pyrrolyl group, a thienyl group, a pyridinyl group, a thiazolyl group, and a benzothiazolyl group being preferred.

[0104] Y １ , Y ２ may each independently be an optionally substituted polycyclic aromatic hydrocarbon group or polycyclic aromatic heterocyclic group. The polycyclic aromatic hydrocarbon group refers to a fused polycyclic aromatic hydrocarbon group or a group derived from an aromatic ring assembly. The polycyclic aromatic heterocyclic group refers to a fused polycyclic aromatic heterocyclic group or a group derived from an aromatic ring assembly.

[0105] Z ０ , Z １ and Z ２ are each independently preferably a hydrogen atom, a halogen atom, an alkyl group having 1 to 12 carbon atoms, a cyano group, a nitro group, or an alkoxy group having 1 to 12 carbon atoms; Z ０ is more preferably a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, or a cyano group; Z １ and Z ２ is more preferably a hydrogen atom, a fluorine atom, a chlorine atom, a methyl group, or a cyano group. ０ , Z１ and Z ２ may contain a polymerizable group.

[0106] Q １ and Q ２ is -NH-, -S-, -NR ２’ -, -O- are preferred, and R ２’ is preferably a hydrogen atom, and among these, —S—, —O—, and —NH— are particularly preferred.

[0107] Among the formulae (Ar-1) to (Ar-23), the formulae (Ar-6) and (Ar-7) are preferred from the viewpoint of molecular stability.

[0108] In formulae (Ar-16) to (Ar-23), Y １ is the nitrogen atom to which it is bonded and Z ０ and may form an aromatic heterocyclic group together. Examples of the aromatic heterocyclic group include those mentioned above as the aromatic heterocyclic ring that Ar may have, and examples thereof include a pyrrole ring, an imidazole ring, a pyrroline ring, a pyridine ring, a pyrazine ring, a pyrimidine ring, an indole ring, a quinoline ring, an isoquinoline ring, a purine ring, and a pyrrolidine ring. This aromatic heterocyclic group may have a substituent. １ is the nitrogen atom to which it is bonded and Z ０ and may be the above-mentioned optionally substituted polycyclic aromatic hydrocarbon group or polycyclic aromatic heterocyclic group, such as a benzofuran ring, a benzothiazole ring, or a benzoxazole ring.

[0109] Specific examples of the liquid crystal compound (B) include compounds described in JP-A-2010-31223 and JP-A-2019-003177, and can be produced according to the methods described in these documents.

[0110] In the present invention, the liquid crystalline compound forming the functional layer can be either a liquid crystalline compound exhibiting a smectic liquid crystal phase or a liquid crystalline compound exhibiting a nematic liquid crystal phase. However, in one embodiment of the present invention, the liquid crystalline compound forming the functional layer is preferably a liquid crystalline compound exhibiting a nematic liquid crystal phase (a compound exhibiting a nematic liquid crystal phase but not a smectic liquid crystal phase). The liquid crystalline compound exhibiting a smectic liquid crystal phase and the liquid crystal compound exhibiting a nematic liquid crystal phase may each be used alone or in combination of two or more. Conventionally, polarizers formed from compositions containing a dichroic dye and a liquid crystalline compound, and light absorption anisotropic films exhibiting polarization performance used to improve the oblique hue during white display in organic EL display devices, have required high orientation order. It is known that liquid crystalline compounds exhibiting a smectic liquid crystal phase, particularly a high-order smectic liquid crystal phase, are suitable for forming these. On the other hand, the present inventors have discovered that when a functional layer is constructed using a liquid crystalline compound exhibiting a nematic liquid crystal phase, it can more effectively absorb light reflected by an OLED electrode and light scattered by a light diffusing agent in a QD filter, thereby further improving the reflective appearance. This is thought to be because a nematic phase, which has moderate fluidity and lower orientational order than a smectic liquid crystal phase and has a layered structure, is better able to absorb not only reflected and scattered light from oblique directions relative to the functional layer plane but also from the front direction during black display, compared to a smectic liquid crystal phase, which has a high orientational order and a layered structure. Furthermore, because the long axes of the molecules of the liquid crystalline compound constituting the nematic liquid crystal phase are oriented in one direction, a functional layer formed by curing the liquid crystalline compound in a vertically oriented state is thought to be able to effectively absorb reflected and scattered light generated inside the display device during black display, improving the reflective appearance, without reducing the luminance during white display.

[0111] In the present invention, it is preferable to use liquid crystal compound (A) or liquid crystal compound (B) as the liquid crystal compound forming the functional layer. The liquid crystal compound (A) and the liquid crystal compound (B) may each be used alone or in combination of two or more. In particular, the liquid crystal compound (A) is preferable as a liquid crystal compound exhibiting a smectic liquid crystal phase, and the liquid crystal compound (B) is preferable as a liquid crystal compound exhibiting a nematic liquid crystal phase.

[0112] In the present invention, the functional layer is preferably formed containing a liquid crystalline compound (A) or a liquid crystalline compound (B), and the functional layer-forming composition preferably contains the liquid crystalline compound (A) or (B). In one embodiment of the present invention, the functional layer-forming composition contains the liquid crystalline compound (A) or the liquid crystalline compound (B) in an amount of preferably 70% by mass or more, more preferably 80% by mass or more, even more preferably 85% by mass or more, and particularly preferably 90% by mass or more, relative to the total mass of the liquid crystalline compounds contained in the functional layer-forming composition, with the upper limit being 100% by mass. When the proportion of the liquid crystalline compound (A) or the liquid crystalline compound (B) is within the above range, a functional layer having excellent absorption ability for reflected light from an OLED electrode and scattered light generated by a QD filter can be obtained. In particular, when the proportion of the liquid crystalline compound exhibiting a nematic liquid crystal phase, for example, the proportion of the liquid crystalline compound (B), is above the above lower limit, a functional layer having even more excellent reflective appearance can be obtained. That is, in one embodiment of the present invention, the composition for forming a functional layer contains a liquid crystalline compound exhibiting a nematic liquid crystal phase in a proportion of preferably 70% by mass or more, more preferably 80% by mass or more, even more preferably 85% by mass or more, and particularly preferably 90% by mass or more, relative to the total mass of the liquid crystalline compounds contained in the composition for forming a functional layer, the upper limit of which may be 100% by mass. Note that when the composition for forming a functional layer contains two or more types of liquid crystalline compound (A) or liquid crystalline compound (B), it is preferable that the total amount of liquid crystalline compound (A) or liquid crystalline compound (B) contained in the composition is within the above range.

[0113] The functional layer may further contain a liquid crystal compound other than the liquid crystal compound (A) or the liquid crystal compound (B). Examples of such a liquid crystal compound include a compound having a structure represented by the following formula (C) (hereinafter, also referred to as "liquid crystal compound (C)").

[0114] P １１ -B １１ -E １１ -B １２ -A １１ -B １３ - (C) [In formula (C), P １１ represents a polymerizable group. １１ represents a divalent alicyclic hydrocarbon group or a divalent aromatic hydrocarbon group. １１ is -O-, -S-, -CO-O-, -O-CO-, -O-CO-O-, -CO-NR １６ -, -NR １６ represents —CO—, —CO—, —CS— or a single bond. １６ represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. １２ and B １３ are each independently —C≡C—, —CH═CH—, —CH ２ -CH ２ -, -O-, -S-, -C(=O)-, -C(=O)-O-, -OC(=O)-, -OC(=O)-O-, -CH=N-, -N=CH-, -N=N-, -C(=O)-NR １６ -, -NR １６ -C(=O)-, -OCH ２ -, -OCF ２ -, -CH ２ O-, -CF ２ represents O—, —CH═CH—C(═O)—O—, —O—C(═O)—CH═CH—, —H, —C≡N—, or a single bond. １１ represents an alkanediyl group having 1 to 12 carbon atoms, and a hydrogen atom contained in the alkanediyl group may be substituted with an alkoxy group having 1 to 5 carbon atoms, and a hydrogen atom contained in the alkoxy group may be substituted with a halogen atom. ２ - may be replaced by -O- or -CO-.]

[0115] Specific examples of the liquid crystal compound (C) include compounds having a polymerizable group among the compounds described in "3.8.6 Network (completely crosslinked)" and "6.5.1 Liquid crystal material b. Polymerizable nematic liquid crystal material" in Liquid Crystal Handbook (edited by Liquid Crystal Handbook Editorial Committee, published by Maruzen Co., Ltd. on October 30, 2000), and liquid crystal compounds described in JP-A Nos. 2010-31223, 2010-270108, 2011-6360, and 2011-207765.

[0116] In one embodiment of the present invention, the content of the liquid crystal compound other than the liquid crystal compound (A) and the liquid crystal compound (B) in the functional layer-forming composition is preferably 30% by mass or less, more preferably 20% by mass or less, even more preferably 15% by mass or less, and particularly preferably 10% by mass or less, relative to the total mass of the liquid crystal compounds contained in the functional layer-forming composition, and the lower limit may be 0% by mass. When the proportion of the liquid crystal compound other than the liquid crystal compound (A) and the liquid crystal compound (B) is within the above range, a functional layer having excellent absorption ability for reflected light at an OLED electrode and scattered light generated by a QD filter can be obtained.

[0117] The content of the liquid crystal compound in the composition for forming a functional layer is preferably 40 to 99.9% by mass, more preferably 60 to 99% by mass, and even more preferably 70 to 99% by mass, based on the solid content of the composition for forming a functional layer. When the content of the liquid crystal compound is within the above range, the alignment of the liquid crystal compound tends to be high.

[0118] In the present invention, the functional layer contains a dichroic dye in addition to a liquid crystal compound. A dichroic dye refers to a dye having different absorbance in the long axis direction of the molecule and absorbance in the short axis direction. In one embodiment of the present invention, the dichroic dye constituting the functional layer preferably contains a combination of at least one cyan dye, at least one magenta dye, and at least one yellow dye. Light taken into the display device and reflected by the OLED electrode during black display is scattered within or transmitted through the quantum dot filter constituting the QD-OLED panel. If the dichroic dye in the functional layer can absorb light corresponding to the emission wavelength of the quantum dot filter, scattered light within the display device can be more effectively absorbed, leading to improved reflective appearance. Since the quantum dot filter of a QD-OLED panel is typically an RGB color filter, by including the dichroic dye in the functional layer containing at least three different dichroic dyes, a high suppression effect against light reflection within the QD-OLED panel during black display can be achieved. Furthermore, in order to fully utilize the high color reproducibility inherently achieved by using quantum dots, it is preferable to make the color of the functional layer less noticeable when displaying white. When the dichroic dye in the functional layer contains at least three types of dichroic dyes, the functional layer is more likely to have light absorption throughout the entire visible light range, making the color of the functional layer less visible when displaying white, and it is expected that the QD-OLED panel will provide high image quality due to the high color reproducibility it is capable of exhibiting. Hereinafter, in this specification, making the color of the functional layer less noticeable when displaying white is also referred to as "neutral graying," which means that when the laminate is stacked on an OLED panel display device and viewed from an oblique angle when displaying white, it appears gray with no hue and only brightness.

[0119] In this specification, a cyan dye refers to a dichroic dye having a maximum absorption at a wavelength of 600 nm or more and 750 nm or less. A magenta dye refers to a dichroic dye having a maximum absorption at a wavelength of 500 nm or more and less than 600 nm. A yellow dye refers to a dichroic dye having a maximum absorption at a wavelength of 380 nm or more and less than 500 nm. The coloring of the display screen during white display can occur when the color of the functional layer is visible due to light absorption by the dichroic dye in the functional layer. If the dichroic dye contained in the functional layer can absorb light corresponding to the emission wavelength of the OLED panel, it can effectively absorb light scattered by the quantum dot filter during black display and easily absorbs light across the entire visible light range, resulting in a neutral gray display during white display. Generally, the emission wavelength of QD-OLED panels is often 440-460 nm, 530-550 nm, or 640-660 nm. Therefore, by incorporating a combination of dichroic dyes having maximum absorption wavelengths (λmax) in these wavelength ranges, it is possible to obtain a laminate that is excellent in neutral graying of the display screen when white is displayed. The absorbance of the dichroic dye can be measured with a spectrophotometer in a solution state in which the dichroic dye is dissolved in a solvent that dissolves the dichroic dye, such as chloroform, or in a solid state in which the solution is applied to a glass substrate or a base material and dried.

[0120] The content of the dichroic dye constituting the functional layer can be appropriately determined depending on the type of dichroic dye used, the thickness of the functional layer, the type of QD-OLED panel to be combined, and the like. For example, the content of each dichroic dye is preferably 1 part by mass or more, more preferably 2 parts by mass or more, and preferably 15 parts by mass or less, more preferably 10 parts by mass or less, relative to 100 parts by mass of the liquid crystal compound. Note that when two or more dichroic dyes of the same type classified as cyan dyes, magenta dyes, or yellow dyes are included (i.e., when multiple dichroic dyes classified as cyan dyes are included), it is preferable that the total content of the same type of dichroic dyes falls within the above-mentioned range as the "content of each dichroic dye" (hereinafter the same applies to the content of the dichroic dyes). In one embodiment of the present invention, when the dichroic dyes include three types of dyes, i.e., a cyan dye, a magenta dye, and a yellow dye, the total content of these dyes is preferably 1 part by mass or more, more preferably 3 parts by mass or more, even more preferably 5 parts by mass or more, and is preferably 30 parts by mass or less, more preferably 25 parts by mass or less, even more preferably 20 parts by mass or less, relative to 100 parts by mass of the liquid crystal compound. When the content of the dichroic dyes is within the above range, a laminate can be obtained that is even more excellent in improving the reflective appearance during black display and in making the display screen neutral gray during white display.

[0121] The mixing ratio of the three dyes, cyan dye, magenta dye, and yellow dye, can be appropriately determined depending on the type of QD-OLED panel to be combined.

[0122] The functional layer may contain dichroic dyes other than the three dichroic dyes, cyan, magenta, and yellow, as long as the effects obtained by containing the three dichroic dyes are achieved. When incorporated into a QD-OLED panel display device, from the viewpoint of improving the reflective appearance during black display and facilitating neutral graying of the display screen during white display without reducing the luminance of the emitted light, the content of dichroic dyes other than cyan, magenta, and yellow dyes is preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 5% by mass or less, and particularly preferably 3% by mass or less, relative to the total content of dichroic dyes contained in the functional layer. From the viewpoint of further enhancing the effects obtained by containing the three dichroic dyes in the functional layer, in one embodiment of the present invention, the functional layer is substantially free of dichroic dyes other than the cyan, magenta, and yellow dyes. Here, "substantially free" means that the content of other dichroic dyes is 0.5% by mass or less, preferably 0.1% by mass or less, relative to the total content of the three types of dichroic dyes contained in the functional layer, and the content of other dichroic dyes may be 0% by mass.

[0123] The dichroic dye constituting the functional layer is typically a dye. When the dichroic dye is a dye, light scattering due to the dichroic dye does not occur within the functional layer, leading to improved reflective appearance when incorporated into a QD-OLED panel display device. Conversely, when the functional layer contains a pigment, for example, the pigment particles may promote scattering of light reflected by the OLED electrode, resulting in scattered light in the functional layer and resulting in a deterioration of reflective appearance. Therefore, the content of the pigment in the functional layer is preferably 1% by mass or less, more preferably 0.5% by mass or less, and even more preferably 0.1% by mass, relative to the solid content of the functional layer-forming composition. For example, it may be 0% by mass. Examples of pigments include black pigments such as carbon black, which are used to achieve the neutral gray color.

[0124] The content (total content) of the dichroic dye is preferably 0.8% by mass or more, more preferably 2.5% by mass or more, and even more preferably 4% by mass or more, relative to the solid content of the functional layer-forming composition, and is preferably 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass or less. When the content of the dichroic dye is within the above range, depending on the type of dichroic dye contained, when incorporated into a QD-OLED panel display device, the laminate can have an improved reflective appearance during black display without reducing luminance, and can have an excellent ability to neutralize the display screen to a neutral gray during white display.

[0125] In the present invention, the dichroic dye can be appropriately selected and combined from dichroic dyes known in the field of optical films. Examples of such dichroic dyes include acridine dyes, oxazine dyes, cyanine dyes, naphthalene dyes, azo dyes, and anthraquinone dyes. Among these, azo dyes are preferred. Examples of azo dyes include monoazo dyes, bisazo dyes, trisazo dyes, tetrakisazo dyes, and stilbene azo dyes, with bisazo dyes and trisazo dyes being preferred.

[0126] Examples of azo dyes include a compound represented by formula (I) (hereinafter also referred to as "compound (I)"). １ (-N=N-K ２ ) ｐ -N=N-K ３ (I) [In formula (I), K １ and K. ３ represent, independently of each other, a phenyl group which may have a substituent, a naphthyl group which may have a substituent, a phenyl benzoate group which may have a substituent, or a monovalent heterocyclic group which may have a substituent. ２ represents an optionally substituted p-phenylene group, an optionally substituted naphthalene-1,4-diyl group, an optionally substituted 4,4'-stilbenylene group, or an optionally substituted divalent heterocyclic group. p represents an integer of 0 to 4. When p is an integer of 2 or more, a plurality of K ２may be the same or different. The —N═N— bond may be replaced with a —C═C—, —COO—, —NHCO—, or —N═CH— bond as long as absorption in the visible region is exhibited.]

[0127] Examples of monovalent heterocyclic groups include groups in which one hydrogen atom has been removed from a heterocyclic compound such as quinoline, thiazole, benzothiazole, thienothiazole, imidazole, benzimidazole, oxazole, benzoxazole, etc. Examples of divalent heterocyclic groups include groups in which two hydrogen atoms have been removed from the above heterocyclic compounds.

[0128] K １ and K. ３ a phenyl group, a naphthyl group, a benzoic acid phenyl ester group, and a monovalent heterocyclic group in the above formula (I), and K ２ Examples of the substituents that the p-phenylene group, naphthalene-1,4-diyl group, 4,4'-stilbenylene group, and divalent heterocyclic group may optionally have include alkyl groups having 1 to 20 carbon atoms, alkyl groups having 1 to 20 carbon atoms and having a polymerizable group, alkenyl groups having 1 to 4 carbon atoms; alkoxy groups having 1 to 20 carbon atoms such as methoxy, ethoxy, and butoxy; alkoxy groups having 1 to 20 carbon atoms and having a polymerizable group; fluorinated alkyl groups having 1 to 4 carbon atoms such as trifluoromethyl; cyano groups; nitro groups; halogen atoms; and substituted or unsubstituted amino groups such as amino groups, diethylamino groups, and pyrrolidino groups (the substituted amino group refers to an amino group having one or two alkyl groups having 1 to 6 carbon atoms, an amino group having one or two alkyl groups having 1 to 6 carbon atoms and having a polymerizable group, or an amino group in which two substituted alkyl groups are bonded to each other to form an alkanediyl group having 2 to 8 carbon atoms, and an unsubstituted amino group refers to -NH ２ Examples of the polymerizable group include a (meth)acryloyl group and a (meth)acryloyloxy group.

[0129] Among the compounds (I), compounds represented by any one of the following formulas (I-1) to (I-8) are preferred. [In formulas (I-1) to (I-8), B １ ~B ３０are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cyano group, a nitro group, a substituted or unsubstituted amino group (the definitions of a substituted amino group and an unsubstituted amino group are as described above), a chlorine atom, or a trifluoromethyl group. n1 to n4 are each independently an integer of 0 to 3. When n1 is 2 or more, multiple B ２ may be the same or different, and when n2 is 2 or more, a plurality of B ６ may be the same or different, and when n3 is 2 or more, a plurality of B ９ may be the same or different, and when n4 is 2 or more, a plurality of B １４ may be the same or different.

[0130] The anthraquinone dye is preferably a compound represented by formula (I-9). [In formula (I-9), R １ ~R ８ are each independently a hydrogen atom, -R ｘ , -NH ２ , -NHR ｘ , -NR ｘ ２ , -SR ｘ or a halogen atom. ｘ represents an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms.

[0131] The oxazone dye is preferably a compound represented by formula (I-10). [In formula (I-10), R ９ ~R １５ are each independently a hydrogen atom, -R ｘ , -NH ２ , -NHR ｘ , -NR ｘ ２ , -SR ｘ or a halogen atom. ｘ represents an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms.

[0132] The acridine dye is preferably a compound represented by formula (I-11). [In formula (I-11), R １６ ~R ２３ are each independently a hydrogen atom, -R ｘ , -NH ２ , -NHR ｘ , -NR ｘ ２ , -SR ｘ or a halogen atom. ｘ represents an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms.] In formulae (I-9), (I-10) and (I-11), R ｘ Examples of the alkyl group having 1 to 6 carbon atoms include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group, and examples of the aryl group having 6 to 12 carbon atoms include a phenyl group, a toluyl group, a xylyl group, and a naphthyl group.

[0133] As the cyanine dye, compounds represented by formula (I-12) and compounds represented by formula (I-13) are preferred. [In formula (I-12), D １ and D ２ each independently represents a group represented by any one of formulas (I-12a) to (I-12d). n5 represents an integer of 1 to 3. [In formula (I-13), D ３ and D ４ each independently represents a group represented by any one of formulas (I-13a) to (I-13h). n6 represents an integer of 1 to 3.

[0134] Specific examples of the dichroic dyes described above include compounds described in, for example, JP-A Nos. 2013-101328 and 2013-210624. From these dichroic dyes, a dichroic dye having a desired wavelength range can be appropriately selected and used depending on the emission wavelength of the QD-OLED panel to be used.

[0135] The composition for forming a functional layer may contain a polymerization initiator. The polymerization initiator is a compound capable of initiating a polymerization reaction of a liquid crystal compound or the like. As the polymerization initiator, a photopolymerization initiator that generates active radicals or acids under the action of light is preferred, as it can initiate a polymerization reaction under lower temperature conditions, and a photopolymerization initiator that generates radicals under the action of light is more preferred. The polymerization initiator may be used alone or in combination of two or more types.

[0136] As the photopolymerization initiator, known photopolymerization initiators can be used. For example, photopolymerization initiators that generate active radicals include self-cleavage photopolymerization initiators and hydrogen abstraction photopolymerization initiators. Examples of self-cleavage photopolymerization initiators that can be used include self-cleavage benzoin compounds, acetophenone compounds, hydroxyacetophenone compounds, α-aminoacetophenone compounds, oxime ester compounds, acylphosphine oxide compounds, and azo compounds. Examples of hydrogen abstraction photopolymerization initiators that can be used include hydrogen abstraction benzophenone compounds, benzoin ether compounds, benzyl ketal compounds, dibenzosuberone compounds, anthraquinone compounds, xanthone compounds, thioxanthone compounds, halogenoacetophenone compounds, dialkoxyacetophenone compounds, halogenobisimidazole compounds, halogenotriazine compounds, and triazine compounds.

[0137] As the photopolymerization initiator that generates an acid, an iodonium salt, a sulfonium salt, or the like can be used.

[0138] Among these, a reaction at low temperature is preferred from the viewpoint of preventing dissolution of the dichroic dye, and a self-cleaving photopolymerization initiator is preferred from the viewpoint of reaction efficiency at low temperature, and an acetophenone-based compound, a hydroxyacetophenone-based compound, an α-aminoacetophenone-based compound, or an oxime ester-based compound is particularly preferred.

[0139] Specific examples of the photopolymerization initiator include the following: benzoin-based compounds such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether; hydroxyacetophenone-based compounds such as 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1,2-diphenyl-2,2-dimethoxyethan-1-one, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]propan-1-one, 1-hydroxycyclohexyl phenyl ketone, and oligomers of 2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]propan-1-one; α-aminoacetophenone-based compounds such as 2-methyl-2-morpholino-1-(4-methylthiophenyl)propan-1-one and 2-dimethylamino-2-benzyl-1-(4-morpholinophenyl)butan-1-one; Oxime ester compounds such as 1,2-octanedione, 1-[4-(phenylthio)-, 2-(O-benzoyloxime)], ethanone, 1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-, 1-(O-acetyloxime); acylphosphine oxide compounds such as 2,4,6-trimethylbenzoyldiphenylphosphine oxide and bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide; benzophenone compounds such as benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3',4,4'-tetra(tert-butylperoxycarbonyl)benzophenone and 2,4,6-trimethylbenzophenone; dialkoxyacetophenone compounds such as diethoxyacetophenone;2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxynaphthyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxystyryl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(5-methylfuran-2-yl)ethenyl]-1,3,5-triazine Triazine-based compounds such as 2,4-bis(trichloromethyl)-6-[2-(furan-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino-2-methylphenyl)ethenyl]-1,3,5-triazine, and 2,4-bis(trichloromethyl)-6-[2-(3,4-dimethoxyphenyl)ethenyl]-1,3,5-triazine. The photopolymerization initiator may be appropriately selected, for example, in relation to the liquid crystal compound that forms the functional layer from the above-mentioned photopolymerization initiator.

[0140] Commercially available photopolymerization initiators may also be used. Examples of commercially available polymerization initiators include Irgacure (registered trademark) 907, 184, 651, 819, 250, and 369, 379, 127, and 754 (manufactured by Ciba Specialty Chemicals), Irgacure (registered trademark) OXE01, OXE02, and OXE03 (manufactured by BASF), Omnirad BCIM, Esacure 1001M, and Esacure KIP160 (manufactured by IDM Resins). B.V.); Seikuol (registered trademark) BZ, Z, and BEE (manufactured by Seiko Chemical Co., Ltd.); Kayacure (registered trademark) BP100, and UVI-6992 (manufactured by The Dow Chemical Company); Adeka Optomer SP-152, N-1717, N-1919, SP-170, Adeka Arcles NCI-831, Adeka Arcles NCI-930 (manufactured by ADEKA Corporation); TAZ-A, and TAZ-PP (manufactured by Nippon SiberHegner Co., Ltd.); and TAZ-104 (manufactured by Sanwa Chemical Co., Ltd.).

[0141] The content of the polymerization initiator is preferably 0.1 to 20 parts by mass, more preferably 0.1 to 15 parts by mass, still more preferably 0.5 to 10 parts by mass, and particularly preferably 0.5 to 8 parts by mass, relative to 100 parts by mass of the liquid crystal compound. When the content of the polymerization initiator is within the above range, the polymerization reaction can be carried out without significantly disturbing the alignment of the liquid crystal compound.

[0142] The functional layer may contain a leveling agent. The leveling agent adjusts the fluidity of the functional layer-forming composition and functions to make the coating film obtained by applying the composition flatter. Specific examples of the leveling agent include surfactants, and at least one selected from the group consisting of leveling agents primarily composed of polyacrylate compounds and leveling agents primarily composed of fluorine-containing compounds is preferred. The leveling agents can be used alone or in combination of two or more.

[0143] Examples of leveling agents containing a polyacrylate compound as a main component include BYK-350, BYK-352, BYK-353, BYK-354, BYK-355, BYK-358N, BYK-361N, BYK-380, BYK-381, and BYK-392 (BYK Chemie).

[0144] Examples of leveling agents containing a fluorine atom-containing compound as a main component include Megafac (registered trademark) R-08, R-30, R-90, F-410, F-411, F-443, F-445, F-470, F-471, F-477, F-479, F-482, F-483, and F-556 (DIC Corporation); Surflon (registered trademark) S-381, S-382 , S-383, S-393, SC-101, SC-105, KH-40, and SA-100 (AGC Seimi Chemical Co., Ltd.); E1830, E5844 (Daikin Fine Chemical Research Institute Co., Ltd.); F-top EF301, F-top EF303, F-top EF351, and F-top EF352 (Mitsubishi Materials Electronic Chemicals Co., Ltd.).

[0145] When the functional layer contains a leveling agent, the content thereof is preferably 0.01 to 5 parts by mass, and more preferably 0.05 to 3 parts by mass, relative to 100 parts by mass of the liquid crystal compound. When the content of the leveling agent is within the above range, the liquid crystal compound is easily aligned, unevenness is less likely to occur, and a smoother functional layer tends to be obtained.

[0146] The functional layer may contain a crosslinking agent. By containing a crosslinking agent, the crosslinking density of the polymerization reactive sites in the functional layer can be increased, and the film strength of the functional layer can be improved. Examples of the crosslinking agent include monofunctional (meth)acrylates and polyfunctional (meth)acrylates. Polyfunctional (meth)acrylates are preferred because they facilitate the continuous polymerization reaction with the liquid crystal compound.

[0147] When the functional layer contains a crosslinking agent, the content thereof is preferably 0.1 to 10 parts by mass, more preferably 0.5 to 8 parts by mass, per 100 parts by mass of the liquid crystal compound. When the content of the crosslinking agent is within the above range, the orientation of the liquid crystal compound and the dichroic dye is less likely to be disturbed, and when incorporated into a QD-OLED panel display device, the film strength can be increased while maintaining high absorption capacity for reflected light and scattered light.

[0148] The functional layer may contain additives other than the leveling agent and the crosslinking agent. Examples of the additives include a photosensitizer, an antioxidant, a release agent, a stabilizer, a flame retardant, and a lubricant. When the functional layer contains the additives, the content of the additives is preferably more than 0% by mass and not more than 20% by mass, more preferably more than 0% by mass and not more than 10% by mass, based on the solid content of the functional layer-forming composition.

[0149] The composition for forming a functional layer can be produced by a conventionally known method for preparing a liquid crystal composition, and can usually be prepared by mixing and stirring a liquid crystalline compound and a dichroic dye, and, if necessary, a polymerization initiator and the above-mentioned additives, etc. Furthermore, from the viewpoint of improving the coatability of the composition and facilitating the formation of the functional layer, the viscosity may be adjusted by adding a solvent to the composition for forming a functional layer.

[0150] The solvent may be appropriately selected depending on the solubility of the liquid crystal compound and dichroic dye to be used, and is preferably a solvent that can completely dissolve the components and is inactive to the polymerization reaction. Specific examples of the solvent include the solvents exemplified as those that can be used in the composition for forming a low-reflection layer, and these solvents may be used alone or in combination of two or more.

[0151] The content of the solvent is preferably 50 to 98 parts by weight, more preferably 70 to 95 parts by weight, per 100 parts by weight of the composition for forming a functional layer. Therefore, the solid content per 100 parts by weight of the composition for forming a functional layer is preferably 2 to 50 parts by weight. If the solid content is 50 parts by weight or less, the viscosity of the composition for forming a functional layer is low, which tends to result in a film with a substantially uniform thickness and less unevenness. The solid content can be determined appropriately taking into account the thickness of the functional layer to be produced.

[0152] The functional layer of the present invention is a layer in which the liquid crystalline compound and the dichroic dye are cured in a state in which they are oriented in a direction perpendicular (vertical) to the plane of the layer, and it is generally preferable that the following formulas (1) and (2) are satisfied when any direction in the plane of the functional layer is defined as the x-axis, the direction in the layer plane perpendicular to the x-axis is defined as the y-axis, and the film thickness direction perpendicular to the x-axis and y-axis is defined as the z-axis. Ax(z=50) / Ax>1 (1) Ay(z=50) / Ay>1 (2) (Ax, Ay, Ax(z=50) and Ay(z=50) are all absorbances at the absorption maximum wavelength of the dichroic dye in the optically anisotropic film, Ax represents the absorbance of linearly polarized light vibrating in the x-axis direction, Ay represents the absorbance of linearly polarized light vibrating in the y-axis direction, Ax(z=50) represents the absorbance of linearly polarized light vibrating in the x-axis direction when the functional layer is rotated 50° around the y-axis as the rotation axis, and Ay(z=50) represents the absorbance of linearly polarized light vibrating in the y-axis direction when the functional layer is rotated 50° around the x-axis as the rotation axis.)

[0153] Ax can be measured by injecting linearly polarized light oscillating in the x-axis direction from the z-axis direction toward the layer surface. Ay can be measured by injecting linearly polarized light oscillating in the y-axis direction from the z-axis direction toward the layer surface. Ax (z = 50) can be measured by rotating the functional layer 50° around the y-axis as the axis of rotation and then injecting the same linearly polarized light as that used to measure Ax. Here, the functional layer is rotated 50° around the y-axis as the axis of rotation, with the functional layer in the state where Ax was measured, and then injecting the same linearly polarized light as that used to measure Ay. Here, the functional layer is rotated 50° around the x-axis as the axis of rotation and then injecting the same linearly polarized light as that used to measure Ay. Here, the functional layer is rotated 50° around the x-axis as the axis of rotation, with the functional layer in the state where Ay was measured, and then injecting the same linearly polarized light. The upper limit values ​​of the above formulas (1) and (2) are preferably 12 or less, for example 10 or less, and in some cases may be 5 or less.

[0154] In one embodiment of the present invention, the functional layer preferably does not exhibit a Bragg peak in X-ray diffraction measurement. A Bragg peak refers to a peak derived from the planar periodic structure of molecular orientation. A liquid crystal cured film with a high degree of orientational order exhibits a Bragg peak derived from a higher-order structure such as a hexatic phase or a crystalline phase in X-ray diffraction measurement. In the present invention, rather than being formed with a high degree of orientational order that would result in a Bragg peak, the functional layer is formed with a moderate degree of orientational order that does not exhibit a Bragg peak. When incorporated into a QD-OLED panel display device, this allows for more effective absorption of light of specific wavelengths from oblique directions, such as light reflected by the OLED electrode or light scattered by a light diffusing agent in the QD filter, without reducing the transmittance of light from the front direction. This allows for even greater improvement in reflective appearance while maintaining high luminance during white display.

[0155] For example, by using a compound that forms a nematic liquid crystal phase (a compound that exhibits a nematic liquid crystal phase but does not exhibit a smectic liquid crystal phase) as the liquid crystal compound, a liquid crystal cured film in which the liquid crystal compound and the dichroic dye are oriented with a moderate orientation order in the direction perpendicular to the functional layer plane can be easily obtained, and a functional layer that does not exhibit the above-mentioned Bragg peak but has a moderate orientation order can be obtained. Note that the state in which the liquid crystal compound is oriented with a moderate orientation order to the extent that it does not exhibit a Bragg peak refers to, for example, a case in which the optical properties represented by the above formulas (1) and (2) are satisfied.

[0156] The thickness of the functional layer may be, for example, 0.05 μm to 5 μm, preferably 0.1 μm or more, more preferably 0.3 μm or more, and preferably 4 μm or less, more preferably 3 μm or less. When the thickness of the functional layer is equal to or greater than the lower limit, light absorption from oblique directions is improved, and the reflective appearance is likely to be improved. When the thickness is equal to or less than the upper limit, the alignment of the liquid crystal compound and the dichroic dye is less likely to be disturbed, and high transmittance in the front direction can be ensured, resulting in high luminance during white display and the potential for a thinner display device when incorporated into the device. The thickness of the functional layer can be measured using a laser microscope, a film thickness meter, or the like.

[0157] In the present invention, the functional layer is obtained by orienting the absorption axis of the dichroic dye in a direction perpendicular to the layer plane. The direction of the absorption axis of the dichroic dye in such a host-guest optically anisotropic film (functional layer) is usually controlled by the orientation direction of the liquid crystalline compound. By orienting the molecular long axis of the liquid crystalline compound in a direction perpendicular to the layer plane, the absorption axis of the dichroic dye can usually be aligned in a direction perpendicular to the film surface. The orientation direction of the liquid crystalline compound can be controlled by the properties of the functional layer-forming composition containing the liquid crystalline compound and the dichroic dye, the properties of the surface to which the composition is applied, and the like.

[0158] In the present invention, the functional layer can be produced, for example, by a method including the steps of: forming a coating film of a functional layer-forming composition containing a liquid crystalline compound and a dichroic dye on a surface on which the functional layer is to be formed; drying the obtained coating film to obtain a dried coating film; and curing the coating film in a state in which the liquid crystalline compound and the dichroic dye in the coating film are oriented in a direction perpendicular to the plane of the coating film.

[0159] The surface on which the functional layer is formed is, for example, a substrate. When a diffusion prevention layer (described later) is present on one or both sides of the functional layer, the functional layer may be formed on the diffusion prevention layer formed on the substrate. As the substrate, a resin film substrate conventionally known in the field of optical films can be used. When the substrate is not peeled off when the functional layer is incorporated into the laminate of the present invention, a transparent resin film substrate is preferred. A transparent resin film substrate refers to a film substrate that has translucency that allows light, particularly visible light, to pass through. Translucency refers to the property of having a luminosity-corrected transmittance of 80% or more for light rays with wavelengths of 380 nm to 780 nm. Examples of the substrate include the same substrates as those exemplified as substrates that can constitute a low-reflection film.

[0160] In order to control the orientation of the functional layer, the functional layer may be formed on an alignment film. The alignment film preferably has solvent resistance such that the functional layer-forming composition does not dissolve when applied, and also has heat resistance during heat treatment for removing the solvent or orienting the liquid crystal compound. Examples of such alignment films include alignment films containing an alignment polymer and photoalignment films. Specifically, for example, alignment films and photoalignment films containing an alignment polymer such as those described in JP 2016-27387 A can be used. In one embodiment of the present invention, the functional layer is laminated adjacent to a diffusion prevention layer described below. That is, in this embodiment, no alignment film exists between the functional layer and the diffusion prevention layer.

[0161] The method for forming a coating film of the composition by applying the composition for forming a functional layer onto a substrate or the like can be the same as the method for obtaining a coating film of the composition for forming a low-reflection layer. Next, the solvent is removed by drying or the like under conditions that do not polymerize the liquid crystal compound contained in the obtained coating film, thereby forming a dried coating film. Examples of drying methods include natural drying, forced air drying, heat drying, and reduced pressure drying.

[0162] The liquid crystalline compound in the coating film is usually heated to a temperature at which it transitions to a liquid crystal state or a solution state or higher, and then cooled to a temperature at which the liquid crystals align, thereby aligning together with the dichroic dye and forming a liquid crystal phase.

[0163] The temperature at which the liquid crystal compound in the coating film is oriented can be determined in advance by, for example, observing the texture of a composition containing the liquid crystal compound. Alternatively, the removal of the solvent and the alignment of the liquid crystals may be carried out simultaneously. The temperature at this time varies depending on the type of solvent to be removed and the type of liquid crystal compound used, but is preferably in the range of 50 to 200°C, more preferably 80 to 130°C.

[0164] The liquid crystalline compound is polymerized and cured while maintaining the liquid crystal state, thereby forming a functional layer as a cured film of the liquid crystal composition. Photopolymerization is a preferred polymerization method. In photopolymerization, the light irradiated onto the dried coating film is appropriately selected depending on the type of liquid crystalline compound contained in the dried coating film (particularly the type of polymerizable group possessed by the liquid crystalline compound), the type and amount of polymerization initiator, etc.

[0165] Examples of the light source of the active energy rays include those exemplified as those usable for curing the composition for forming a low reflection layer. The irradiation intensity of the active energy rays is usually 10 to 3,000 mW / cm. ２ The irradiation intensity is preferably an intensity in a wavelength region effective for activating the photopolymerization initiator. Irradiation is carried out once or multiple times at such an active energy ray irradiation intensity, and the cumulative light amount is preferably 10 to 5,000 mJ / cm. ２ , preferably 50 to 3,000 mJ / cm ２ , more preferably 100 to 2,000 mJ / cm ２ is.

[0166] In the laminate of the present invention, the functional layer may include a diffusion prevention layer on one or both sides thereof. By laminating a diffusion prevention layer on the functional layer, it is possible to effectively suppress the diffusion of the dichroic dye contained in the functional layer into other layers, and when the laminate of the present invention is incorporated into a display device or the like, it is possible to suppress the deterioration of optical properties over time due to the diffusion of the dichroic dye. From the viewpoint of fully achieving this effect, it is preferable that the diffusion prevention layer is provided adjacent to the functional layer on at least one side of the functional layer, and more preferably, it is provided adjacent to the functional layer on both sides of the functional layer, respectively, or via only the alignment film that forms the functional layer. When diffusion prevention layers are provided on both sides of the functional layer, they may be the same or different.

[0167] The diffusion prevention layer is not particularly limited as long as it is a layer having a function of preventing the diffusion of a dichroic dye, and examples thereof include a layer formed from a resin composition containing a water-soluble polymer, and a layer formed from a curable composition containing an active energy ray-curable resin.

[0168] The water-soluble polymer has a polarity significantly different from that of the dichroic dye, and therefore can prevent the diffusion of the dichroic dye. Examples of water-soluble polymers that can form the diffusion prevention layer include polyacrylamide-based polymers; polyvinyl alcohol, and vinyl alcohol-based polymers such as ethylene-vinyl alcohol copolymers and (meth)acrylic acid or its anhydride-vinyl alcohol copolymers; carboxyvinyl-based polymers; polyvinylpyrrolidone; starches; sodium alginate; and polyethylene oxide-based polymers. These polymers may be used alone or in combination of two or more.

[0169] When the diffusion prevention layer is a layer formed from a resin composition containing a water-soluble polymer (hereinafter also referred to as a "water-soluble polymer-containing resin composition"), the content of the water-soluble polymer in the layer is preferably 75% by mass or more, more preferably 80% by mass or more, and even more preferably 85% by mass or more.

[0170] When the diffusion-preventing layer is a layer formed from a water-soluble polymer-containing resin composition, a crosslinking structure may be introduced by using a crosslinking agent to increase the density of the layer and improve the dichroic dye diffusion-preventing function. Examples of such crosslinking agents include water-soluble additives and crosslinking agents such as ionic crosslinking agents such as glyoxylate salts and epoxy crosslinking agents, as well as hydrophobic crosslinking agents such as isocyanate crosslinking agents, polyaldehyde crosslinking agents such as glyoxal and glyoxal derivatives, and metal compound crosslinking agents such as zirconium chloride and titanium lactate crosslinking agents for the purpose of imparting water resistance.

[0171] When a crosslinking agent is used to introduce a crosslinked structure into the diffusion prevention layer, the amount of the crosslinking agent added may be appropriately determined depending on the type of crosslinking agent used, etc. For example, the amount may be 0.1 to 100 parts by mass, preferably 1 to 50 parts by mass, and more preferably 10 to 30 parts by mass, per 100 parts by mass of the water-soluble polymer. When the content of the crosslinking agent is within the above range, the diffusion prevention layer becomes dense, and the shielding effect against the dichroic dye in the functional layer is likely to be improved.

[0172] The water-soluble polymer-containing resin composition capable of forming the diffusion barrier layer is usually prepared as a solution in which the water-soluble polymer is dissolved in a solvent. The solvent may be selected depending on the water-soluble polymer to be used, but typical examples include water, alcohol, and a mixture of water and alcohol, with water being preferred.

[0173] The solids concentration of the water-soluble polymer-containing resin composition obtained by adding a solvent to the components constituting the diffusion prevention layer, such as the water-soluble polymer and crosslinking agent, is preferably 1 to 50 mass %, more preferably 2 to 30 mass %. When the solids concentration of the water-soluble polymer-containing resin composition is within the above range, the viscosity of the composition is low, resulting in good coatability and handleability.

[0174] The water-soluble polymer-containing resin composition may contain other components such as additives in addition to the water-soluble polymer, crosslinker, and solvent such as water. Examples of such other components include preservatives and leveling agents. When the water-soluble polymer-containing resin composition contains other components such as additives, the amount of such components is preferably 10% by mass or less, more preferably 5% by mass or less, based on the solid content of the resin composition.

[0175] For example, the diffusion prevention layer can be obtained by applying a water-soluble polymer-containing resin composition to the surface on which the diffusion prevention layer is to be formed, and then drying and curing the coating.

[0176] The method for applying the water-soluble polymer-containing resin composition is not particularly limited, and examples thereof include known methods similar to the method for applying the composition for forming a low reflection layer.

[0177] The drying temperature and time for forming a diffusion-preventing layer from a coating film of the water-soluble polymer-containing resin composition are not particularly limited and may be appropriately determined depending on the composition of the water-soluble polymer-containing resin composition used. The drying treatment can be carried out, for example, by blowing hot air, and the temperature is usually within the range of 40 to 100°C, preferably 60 to 100°C. The drying time is usually 10 to 600 seconds.

[0178] Active energy ray-curable resins tend to have excellent dichroic dye diffusion prevention properties due to their high polymerizability. Examples of curable compositions containing active energy ray-curable resins capable of forming a diffusion prevention layer (hereinafter also referred to as "diffusion prevention layer-forming curable compositions") include cationically polymerizable curable compositions containing cationically polymerizable compounds as curable compounds, radically polymerizable curable compositions containing radically polymerizable compounds as curable compounds, and hybrid curable compositions containing both cationically polymerizable and radically polymerizable compounds. Specific examples of cationically polymerizable compounds include epoxy compounds having one or more epoxy groups in the molecule, oxetane compounds having one or more oxetane rings in the molecule, and vinyl compounds. Specific examples of radically polymerizable compounds include (meth)acrylic compounds having one or more (meth)acryloyl groups in the molecule, vinyl compounds, and the like. The diffusion prevention layer-forming curable composition may contain one or more cationically polymerizable compounds and / or one or more radically polymerizable compounds.

[0179] The cationically polymerizable compound, which is the main component of the cationically polymerizable curable composition, refers to a compound that undergoes a cationic polymerization reaction and is cured by irradiation with active energy rays such as ultraviolet light, visible light, electron beams, and X-rays, or by heating, and examples thereof include epoxy compounds, oxetane compounds, vinyl compounds, etc. Among these, the preferred cationically polymerizable compound is an epoxy compound.

[0180] An epoxy compound is a compound having one or more, preferably two or more, epoxy groups in the molecule. One type of epoxy compound may be used alone, or two or more types may be used in combination. Examples of epoxy compounds include alicyclic epoxy compounds, aromatic epoxy compounds, hydrogenated epoxy compounds, and aliphatic epoxy compounds. From the viewpoints of weather resistance, curing speed, and adhesiveness, it is preferable that the epoxy compound contains an alicyclic epoxy compound or an aliphatic epoxy compound.

[0181] In one embodiment of the present invention, when the curable composition for forming a diffusion prevention layer contains an epoxy compound as a cationically polymerizable compound, the content of the epoxy compound is preferably 10 parts by mass or more, more preferably 15 parts by mass or more, and even more preferably 20 parts by mass or more, relative to 100 parts by mass of the solid content of the curable composition, and is preferably 70 parts by mass or less, more preferably 60 parts by mass or less, and even more preferably 50 parts by mass or less.

[0182] When the total amount of curable compounds contained in the curable composition for forming a diffusion barrier layer (including the hybrid type) containing a cationically polymerizable compound is taken as 100 mass %, the content of the cationically polymerizable compound (when two or more types of cationically polymerizable compounds are contained, the total content of these compounds) is preferably 50 mass % or more, more preferably 60 mass % or more, and even more preferably 70 mass % or more. In addition, the cationically polymerizable curable composition may further contain a polymer component (such as a thermoplastic resin).

[0183] When the curable composition for forming a diffusion barrier layer contains a cationic polymerizable compound, it preferably contains a cationic photopolymerization initiator. The cationic photopolymerization initiator generates cationic species or Lewis acids upon irradiation with active energy rays such as visible light, ultraviolet light, X-rays, or electron beams, thereby initiating the polymerization reaction of the cationic curable compound. Because the cationic photopolymerization initiator acts catalytically when exposed to light, it exhibits excellent storage stability and workability even when mixed with the cationic photocurable compound. Examples of compounds that generate cationic species or Lewis acids upon irradiation with active energy rays include onium salts such as aromatic iodonium salts and aromatic sulfonium salts, aromatic diazonium salts, and iron-arene complexes.

[0184] The cationic photopolymerization initiator may be used alone or in combination of two or more. Among them, aromatic sulfonium salts are preferably used because they have ultraviolet absorption properties even in the wavelength region around 300 nm, and therefore are excellent in curability and can give a cured product having good mechanical strength and adhesive strength.

[0185] The content of the cationic photopolymerization initiator in the curable composition for forming a diffusion prevention layer is preferably 1 to 10 parts by mass, more preferably 2 to 8 parts by mass, per 100 parts by mass of the solid content of the curable compound. When the content of the cationic photopolymerization initiator is within the above range, the cationic polymerizable compound can be sufficiently cured, and the resulting diffusion prevention layer can be imparted with high mechanical strength and adhesive strength.

[0186] A hybrid curable composition can also be obtained by incorporating a radically polymerizable compound in addition to a cationic polymerizable compound into a cationic polymerization curable composition. The combined use of a radically polymerizable compound is expected to have the effect of increasing the hardness and mechanical strength of the diffusion prevention layer, and further makes it easier to adjust the viscosity, curing speed, etc. of the curable composition.

[0187] The radically polymerizable compound, which is the main component of the radically polymerizable curable composition, refers to a compound that undergoes a radical polymerization reaction and hardens when exposed to active energy rays such as ultraviolet light, visible light, electron beams, or X-rays, or when heated, and specific examples include compounds having an ethylenically unsaturated bond. Examples of compounds having an ethylenically unsaturated bond include (meth)acrylic compounds having one or more (meth)acryloyl groups in the molecule, as well as vinyl compounds such as styrene, styrene sulfonic acid, vinyl acetate, vinyl propionate, and N-vinyl-2-pyrrolidone. Among these, the preferred radically polymerizable compounds are (meth)acrylic compounds.

[0188] The (meth)acrylic compound may be the same as the (meth)acrylic compound exemplified as the active energy ray-curable compound that can be used in the composition for forming a low-reflection layer. The (meth)acrylic compound may be used alone or in combination of two or more. When a polyfunctional (meth)acrylate compound is used, the crosslinking density of the diffusion-preventing layer can be adjusted by controlling the molecular weight between crosslinking points and the number of crosslinking points of the compound. More specifically, the smaller the molecular weight between crosslinking points, the higher the crosslinking density, and the larger the number of crosslinking points, the denser the crosslinking density, thereby improving the shielding ability against the dichroic dye in the functional layer.

[0189] The urethane (meth)acrylate compound generally refers to a reaction product of an isocyanate compound, a polyol compound, and a (meth)acrylate compound, and is preferably a polyfunctional urethane (meth)acrylate compound having two or more (meth)acryloyloxy groups in the molecule. Because polyfunctional urethane (meth)acrylate compounds can form a crosslinked structure, they are advantageous in terms of improving the dichroic dye diffusion prevention function of the diffusion prevention layer and can also impart appropriate toughness. The number of functional groups in the polyfunctional urethane (meth)acrylate compound is preferably 2 to 5.

[0190] Examples of epoxy (meth)acrylate compounds include polyfunctional epoxy (meth)acrylates that can be obtained by an addition reaction between polyglycidyl ether and (meth)acrylic acid and have at least two (meth)acryloyloxy groups in the molecule. Examples of polyester (meth)acrylate compounds include compounds that have an ester bond and at least two (meth)acryloyl groups (typically (meth)acryloyloxy groups) in the molecule.

[0191] In one embodiment of the present invention, when the curable composition for forming a diffusion prevention layer contains a radically polymerizable compound, it is preferable that the radically polymerizable compound contains a polyfunctional (meth)acrylate compound. In this case, the content of the polyfunctional (meth)acrylate compound is preferably 50 parts by mass or more, more preferably 60 parts by mass or more, and even more preferably 70 parts by mass or more, and is preferably 100 parts by mass or less, more preferably 95 parts by mass or less, and even more preferably 90 parts by mass or less, relative to 100 parts by mass of the solid content of the curable composition.

[0192] In one embodiment of the present invention, when the curable composition for forming a diffusion barrier layer contains a radically polymerizable compound, the radically polymerizable compound preferably contains a polyfunctional (meth)acrylate compound and a polyfunctional urethane (meth)acrylate compound. In this case, the polyfunctional (meth)acrylate compound and the urethane (meth)acrylate compound are preferably contained in a ratio (mass ratio of polyfunctional (meth)acrylate compound:urethane (meth)acrylate compound) of 95:5 to 50:50, more preferably 90:10 to 70:30.

[0193] When the curable composition for forming the diffusion prevention layer contains a radical polymerizable compound, it preferably contains a photoradical polymerization initiator. The photoradical polymerization initiator initiates the polymerization reaction of the radical curable compound by irradiation with active energy rays such as visible light, ultraviolet light, X-rays, or electron beams. The photoradical polymerization initiator may be used alone or in combination of two or more.

[0194] Specific examples of the photoradical polymerization initiator include acetophenone-based initiators such as acetophenone, 3-methylacetophenone, benzyl dimethyl ketal, 1-(4-isopropylphenyl)-2-hydroxy-2-methylpropan-1-one, 2-[4-(methylthio)benzoyl]-2-(4-morpholinyl)propane, and 2-hydroxy-2-methyl-1-phenylpropan-1-one; benzophenone-based initiators such as benzophenone, 4-chlorobenzophenone, and 4,4'-diaminobenzophenone; and 2,2-dimethoxybenzophenone. alkylphenone-based initiators such as 1,2-diphenylethan-1-one and 1-hydroxycyclohexylphenyl ketone; benzoin ether-based initiators such as benzoin propyl ether and benzoin ethyl ether; thioxanthone-based initiators such as 4-isopropylthioxanthone; acylphosphine oxide-based initiators such as bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide; and others such as xanthone, fluorenone, camphorquinone, benzaldehyde, and anthraquinone.

[0195] The content of the photoradical polymerization initiator in the curable composition for forming a diffusion prevention layer is preferably 1 to 10 parts by mass, more preferably 2 to 8 parts by mass, per 100 parts by mass of the solid content of the curable compound. When the content of the photoradical polymerization initiator is within the above range, the polymerization initiation ability is sufficiently exhibited, and the curability is improved, while the photoradical polymerization initiator is less likely to remain, making it easier to suppress a decrease in visible light transmittance, etc.

[0196] In the present invention, the curable composition for forming a diffusion-preventing layer may contain an organic solvent, for example, to adjust the viscosity to a level suitable for the coating method to be adopted, or may be substantially solvent-free (solvent-free). Note that "substantially solvent-free" does not exclude cases where a solvent is inevitably mixed in.

[0197] The solvent may be any solvent capable of dissolving the components constituting the diffusion prevention layer, and examples thereof include the same solvents as those usable in the composition for forming the low reflection layer. These solvents may be used alone or in combination of two or more.

[0198] The type and content of the solvent are appropriately selected depending on the types and contents of the components constituting the diffusion prevention layer, the shape, the application method, the thickness of the diffusion prevention layer, etc. When a solvent is contained, the amount thereof is, for example, preferably 3 to 1,000 parts by mass, more preferably 5 to 100 parts by mass, and even more preferably 7 to 50 parts by mass, per 100 parts by mass of the solid content of the curable composition.

[0199] The curable composition for forming a diffusion prevention layer may contain additives such as a cationic polymerization accelerator, a photosensitizer, an ion trapping agent, an antioxidant, a chain transfer agent, a tackifier, a thermoplastic resin, a filler, a flow adjuster, a plasticizer, an antifoaming agent, an antistatic agent, and a leveling agent, as needed.

[0200] For example, a diffusion-preventing layer can be obtained by applying a curable composition for forming a diffusion-preventing layer to the surface on which the diffusion-preventing layer is to be formed, and then irradiating the coating with active energy rays to cure the composition. The method of applying the curable composition for forming a diffusion-preventing layer, the type of active energy rays used for curing, the light source, the irradiation conditions, and the like can be similar to the methods and conditions for applying and curing the composition for forming a low-reflection layer or the composition for forming a functional layer.

[0201] The thickness of the diffusion prevention layer is preferably 0.1 μm or more and 5 μm or less, more preferably 0.3 μm or more and 4 μm or less, and even more preferably 0.5 μm or more and 3 μm or less. Within the above range, diffusion of the dichroic dye in the functional layer into other layers can be effectively suppressed. When a diffusion prevention layer is included on both sides of the functional layer, the thicknesses of the diffusion prevention layers may be the same or different.

[0202] The configuration of the diffusion prevention layer laminated on the functional layer can be appropriately determined depending on the composition of the functional layer, the composition of the layer adjacent to the diffusion prevention layer, the layer structure of the laminate, etc. In one embodiment of the present invention, it is preferable that at least one surface of the functional layer is provided with a diffusion prevention layer formed from a water-soluble polymer or a diffusion prevention layer formed from an active energy ray-curable resin. It is more preferable that one surface of the functional layer is provided with a diffusion prevention layer formed from a water-soluble polymer and the other surface is provided with a diffusion prevention layer formed from an active energy ray-curable resin. A diffusion prevention layer formed from an active energy ray-curable resin has excellent scratch resistance, making it less susceptible to damage during roll transport and maintaining good orientation of the functional layer. It also has excellent solvent resistance, which is advantageous in that it broadens the range of solvents that can be used. On the other hand, a diffusion prevention layer formed from a water-soluble polymer can be coated and formed on the functional layer without dissolving the functional layer. Furthermore, because the solvent is water, the drying temperature can be set low, which is advantageous in that the functional layer is less susceptible to thermal degradation. By appropriately arranging these diffusion prevention layers depending on the layer structure of the laminate, etc., the above advantages can be fully utilized, leading to improved effects of the present invention.

[0203] For example, in one embodiment of the present invention, it is preferable that a diffusion prevention layer formed from a resin composition containing a water-soluble polymer is laminated on the surface of the functional layer on which the low-reflection film is laminated. Also, in another embodiment of the present invention, it is preferable that a diffusion prevention layer formed from a curable composition containing an active energy ray-curable resin is laminated on the surface of the functional layer opposite to the side on which the low-reflection film is laminated. Furthermore, in a preferred embodiment of the present invention, it is preferable that a diffusion prevention layer formed from a resin composition containing a water-soluble polymer is laminated on the surface of the functional layer on which the low-reflection film is laminated, and a diffusion prevention layer formed from a curable composition containing an active energy ray-curable resin is laminated on the surface of the functional layer opposite to the side on which the low-reflection film is laminated.

[0204] The laminate of the present invention comprises a low-reflection film and a functional layer. In one embodiment of the present invention, the laminate of the present invention is preferably laminated so that, when incorporated into a QD-OLED panel display device, the low-reflection film is located on the viewing side and the functional layer is located on the QD-OLED panel side. That is, the low-reflection layer constituting the low-reflection film is laminated so that it is located on the viewing side of the functional layer. By laminating the low-reflection film (low-reflection layer) so that it is located on the viewing side and the functional layer is located on the QD-OLED panel side when incorporated into a QD-OLED panel display device, the low-reflection film (low-reflection layer) can effectively suppress or prevent external light from being reflected onto the display screen during black display. In addition, the functional layer located on the panel side efficiently absorbs light that is taken into the display device and reflected by the OLED electrode, as well as light that is scattered by a light diffusing agent or the like contained in the QD filter, thereby achieving a significant improvement in the reflective appearance caused by light reflection inside and outside the panel during black display. For example, when a low-reflection film includes a substrate and a low-reflection layer, the substrate, low-reflection layer, and functional layer can be laminated in this order as long as the low-reflection film is laminated so that it is positioned on the visible side of the functional layer when incorporated into a QD-OLED panel display device. However, since the effect is more easily achieved when the low-reflection layer is positioned on the outermost layer of the laminate (due to the refractive index relationship), it is more preferable to include the low-reflection layer, substrate, and functional layer in this order. In one embodiment of the present invention, the low-reflection film preferably includes an anti-fouling layer on the outermost surface opposite to the side on which the functional layer of the low-reflection film is laminated. In this case, the laminate of the present invention preferably includes an anti-fouling layer, a low-reflection layer, and a functional layer in this order, and it is preferable that the outermost layer of the laminate that is on the visible side when incorporated into a QD-OLED panel display device is the anti-fouling layer.

[0205] The specific layer structure of the laminate of the present invention will be described with reference to FIG. 1 . For example, as shown in FIG. 1 , the laminate 1 of the present invention includes a low-reflection film 21 and a functional layer 13. The low-reflection film 21 may have either a single-layer or multilayer structure, as long as it includes the low-reflection layer 11. Layers that may constitute the low-reflection film other than the low-reflection layer include, for example, a substrate, a hard coat layer, and an antifouling layer. In the laminate 1, the low-reflection film 21 has a multilayer structure and includes, in addition to the low-reflection layer 11, a substrate 12, a hard coat layer 16, and an antifouling layer 17. The low-reflection film 21 and the functional layer 13 are laminated with a pressure-sensitive adhesive layer 14. The functional layer preferably has a diffusion prevention layer on one or both sides; in FIG. 1 , the functional layer 13 has a diffusion prevention layer 15 on each of its two sides. When the laminate 1 shown in FIG. 1 is incorporated into a QD-OLED panel display device, the low-reflection film 21 side faces the viewing side, and the diffusion prevention layer 15 side laminated on the outside of the functional layer 13 faces the QD-OLED panel side. The diffusion prevention layer 15 and the QD-OLED panel are bonded together, for example, via a pressure-sensitive adhesive layer (not shown).

[0206] Specific layer configurations of the laminate of the present invention include, for example, the following configurations. The following configurations are listed starting from the layer that will be visible when incorporated into a QD-OLED panel display device: low-reflection layer / substrate / adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer, anti-fouling layer / low-reflection layer / substrate / adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer, low-reflection layer / hard coat layer / substrate / adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer, anti-fouling layer / low ... / adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer, anti-diffusion layer / functional layer / anti-diffusion layer layer / adhesive layer / substrate / hard coat layer / low-reflection layer, substrate / hard coat layer / low-reflection layer / adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer, low-reflection layer / functional layer, low-reflection layer / adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer, anti-fouling layer / low-reflection layer / adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer, low-reflection layer / hard coat layer / adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer, anti-fouling layer / low ... Adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer / adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer, anti-diffusion layer / functional layer / anti-diffusion layer / adhesive layer / hard coat layer / low-reflection layer, hard coat layer / low-reflection layer / adhesive layer / anti-diffusion layer / functional layer / anti-diffusion layer, low-reflection layer / substrate / adhesive layer / functional layer, anti-fouling layer / low-reflection layer / substrate / adhesive layer / functional layer, low-reflection layer / hard coat layer / substrate / adhesive layer / functional layer, anti-fouling layer / low-reflection layer / hard coat layer / substrate / adhesive layer / functional layer, low-reflection layer / substrate / anti-fouling layer / Functional layer / anti-diffusion layer, anti-fouling layer / low-reflection layer / substrate / anti-diffusion layer / functional layer / anti-diffusion layer, low-reflection layer / hard coat layer / substrate / anti-diffusion layer / functional layer / anti-diffusion layer, anti-fouling layer / low ...diffusion layer / functional layer / anti-diffusion layer / substrate / hard coat layer / low-reflection layer, substrate / hard coat layer / low-reflection layer / anti-diffusion layer / functional layer / anti-diffusion layer.

[0207] The low-reflection film and the functional layer, or, if included, each layer such as a diffusion prevention layer laminated on one or both sides of the functional layer, may be bonded together via, for example, a pressure-sensitive adhesive layer. Also, the functional layer formed with or without, for example, a diffusion prevention layer or an alignment film may be laminated on the low-reflection film.

[0208] In the present invention, the adhesive layer disposed between the low-reflection film and each layer, such as a functional layer, is a layer formed from an adhesive. The adhesive layer can be formed from a known adhesive as long as it can function as a layer for bonding the layers to be bonded. The adhesive or adhesive is not particularly limited, and conventionally known adhesives and adhesives can be used without particular limitation. Examples of adhesives include adhesives having a base polymer such as acrylic, rubber, urethane, silicone, or polyvinyl ether. Energy ray-curable adhesives and heat-curable adhesives may also be used. Examples of adhesives include active energy ray-curable adhesives, water-based adhesives, organic solvent-based adhesives, and solventless adhesives. In one embodiment of the present invention, the adhesive layer is formed from an adhesive.

[0209] The thickness of the adhesive layer is usually about 1 to 50 μm, preferably 3 to 30 μm.

[0210] The average luminous reflectance of the laminate of the present invention is preferably 0.1% or more and 1% or less. When the average luminous reflectance of the entire laminate is within this range, the laminate has sufficient external light anti-reflection function. From the viewpoint of a higher external light anti-reflection function, the average luminous reflectance of the laminate is preferably 0.05% or more, more preferably 0.1% or more, and preferably 0.6% or less, more preferably 0.5% or less, even more preferably 0.45% or less, and particularly preferably 0.42% or less. The average luminous reflectance can be calculated from the reflectance spectrum obtained by irradiating the laminate with light from an oblique direction using a spectrophotometer, according to the method described in JIS Z 8722. In more detail, it can be measured by the method described in the Examples below. Note that the laminate to be measured for average luminous reflectance here refers to a laminate structure incorporated into a QD-OLED panel display device. That is, for example, in the laminate shown in FIG. 1, this refers to the structure from the low-reflection film located on the viewing side when incorporated into a display device to the anti-diffusion layer located on the panel side, and does not include adhesive layers or the like used to attach the laminate to the panel. The same applies to the total light transmittance of the laminate described below.

[0211] The average luminous reflectance of the laminate can be controlled within the above range by the configuration of the low-reflection film, for example, the composition of the low-reflection layer, its thickness, the layer configuration of the laminate (for example, the stacking order of each layer constituting the laminate), etc.

[0212] The total light transmittance of the laminate is 80% or more. When the total light transmittance of the laminate is 80% or more, the laminate has high transparency and can take in a sufficient amount of light into a display device when incorporated into the display device, resulting in a laminate with excellent optical properties. The total light transmittance of the laminate is preferably 82% or more. The upper limit of the total light transmittance is not particularly limited, and is 100% or less. The total light transmittance can be measured, for example, according to the method described in JIS K 7361. Specifically, it can be measured by the method described in the examples below.

[0213] The total light transmittance of the laminate can be controlled within the above range by the configuration of the low-reflection film, for example, the composition and thickness of the low-reflection layer, and the layer configuration of the laminate, for example, the stacking order of the layers constituting the laminate.

[0214] The laminate of the present invention can suppress the reflective appearance caused by light reflection inside and outside the panel during black display and improve the brightness during white display in a display device using a QD-OLED panel, and is therefore suitable as a low-reflection layer or an anti-reflection layer in a QD-OLED panel display device. Accordingly, the present invention also covers a display device including the laminate of the present invention and a quantum dot organic EL light-emitting panel (QD-OLED panel).

[0215] QD-OLED panels generally include a blue organic EL light-emitting layer provided on a TFT substrate, and a quantum dot filter (also referred to as a QD filter or quantum dot light-emitting layer) containing red and green quantum dots. The device structure employs a top-emission light-emitting method. QD filters contain semiconductor nanoparticles called quantum dots, which are made from semiconductor materials containing zinc, cadmium, sulfur, etc. The use of multiple quantum dots of different sizes enables displays that emit (or emit) light of multiple wavelengths. QD filters generally use a light diffusing agent, such as titanium oxide, to prevent aggregation of the nanoparticles (quantum dots) in the QD filter and improve wavelength conversion and light extraction efficiency. However, when light reflected from an electrode strikes a light diffusing agent, the reflected light can be scattered within the QD filter, resulting in a deterioration in the reflective appearance. By laminating the laminate of the present invention on the viewing side of such a QD-OLED panel, the scattered light generated by the QD filter can be effectively absorbed, thereby improving the reflective appearance caused by light reflection inside and outside the panel during black display. Furthermore, the laminate of the present invention is less likely to cause a decrease in luminance during white display compared to circular polarizers used in conventional OLED panels, and therefore can achieve both suppression of the reflective appearance caused by light reflection inside and outside the panel during black display and improvement of luminance during white display without using a circular polarizer.

[0216] In the display device of the present invention, the QD-OLED panel is not particularly limited, and any panel commonly used in the art can be used. The laminate of the present invention and the QD-OLED panel can be bonded together, for example, via a pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer is not particularly limited, and any of the conventional pressure-sensitive adhesives and adhesives listed as examples that can be used in the laminate of the present invention can be used without any particular limitation.

[0217] In one embodiment of the present invention, the low-reflection film in the laminate of the present invention is arranged so as to be located on the viewing side of the functional layer in the display device of the present invention. In particular, by positioning the low-reflection film, preferably the low-reflection layer, on the outermost surface or in a position close to the outermost surface on the viewing side, the low-reflection film (low-reflection layer) can effectively suppress or prevent reflection of external light on the display screen during black display, and the functional layer located on the panel side efficiently absorbs light taken into the display device and reflected by the OLED electrode, as well as light scattered by the light diffusing agent in the QD filter, thereby achieving a significant improvement in the reflective appearance caused by light reflection inside and outside the panel during black display.

[0218] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to these examples. Unless otherwise specified, "%" and "parts" in the examples and comparative examples are "% by mass" and "parts by mass".

[0219] 1. Methods for measuring average luminous reflectance, total light transmittance, and absorbance In the examples and comparative examples, the average luminous reflectance and total light transmittance of the low-reflection film and each laminate, and the absorbance of the functional layer were measured according to the following methods.

[0220] (1) Luminous Average Reflectance The low-reflection film and laminate to be measured were each attached to a black acrylic plate (Sumipex, manufactured by Sumitomo Chemical) via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to prepare an evaluation sample. The substrate side of the low-reflection film and the side of each laminate to be laminated with the QD-OLED panel were attached to the black acrylic plate. Using a spectrophotometer ("CM-3700A" manufactured by Konica Minolta, Inc.), light from a D65 light source was incident on the measurement sample from an 8° angle relative to the normal direction, and the measurement was performed in the specular reflection elimination mode (SCE mode). The luminous-corrected reflectance Y value obtained from the reflection spectrum of the sample measured in SCE mode according to the method described in JIS Z 8722 was used as the luminous average reflectance.

[0221] (2) Total Light Transmittance The total light transmittance of the low reflection film and each laminate to be measured was measured using a haze meter (HZ-2; manufactured by Suga Test Instruments Co., Ltd.).

[0222] (3) Ax(z=50) / Ax The coated surface of the functional layer was attached to a 4 × 4 cm × 0.7 mm thick glass sheet via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation), and the absorbance was measured in an ultraviolet-visible spectrophotometer (Shimadzu Corporation, “UV-2700i”), and Ax and Ax(z=50) at the maximum absorption wavelength (λmax) in the wavelength range of 400 to 750 nm were calculated. The x-axis represents an arbitrary direction within the plane of the functional layer, the y-axis represents a direction perpendicular to the x-axis within the film plane, and the z-axis represents the thickness direction of the functional layer. Ax and Ax (z = 50) are both absorbances of the functional layer at the absorption maximum wavelength of 400 to 750 nm. Ax represents the absorbance of linearly polarized light oscillating in the x-axis direction, and Ax (z = 50) represents the absorbance of linearly polarized light oscillating in the x-axis direction when the film is rotated 50° around the y-axis as the axis of rotation. When measuring absorbance, the sample was placed in a UV-visible spectrophotometer (Shimadzu Corporation's "UV-2700i") and corrected to zero absorbance at 800 nm, after which Ax was measured. For Ax (z = 50), the sample was similarly set and tilted, and then corrected to zero absorbance at 800 nm, after which Ax (z = 50) was measured.

[0223] 2. Preparation of Laminate (1) Preparation of Functional Layer-Forming Composition The liquid crystal compound, dichroic dye, and carbon black used in the preparation of the functional layer are as follows.

[0224] Liquid Crystal Compounds A1 and A2 Liquid crystal compounds A1 and A2 were synthesized according to the method described in Lub et al., Recl. Trav. Chim. Pays-Bas, 115, 321-328 (1996). Both liquid crystal compounds A1 and A2 were liquid crystal compounds exhibiting a smectic liquid crystal phase. The liquid crystal phase was evaluated by observing the texture using a polarizing microscope. The same applies to liquid crystal compounds B1 to B3. Liquid crystal compound A1: Liquid crystal compound A2:

[0225] Liquid crystal compounds B1, B2, B3 Liquid crystal compound B1 was synthesized according to the method described in JP 2021-143329 A, liquid crystal compound B2 was synthesized according to the method described in JP 2010-31223 A, and liquid crystal compound B3 was synthesized according to the method described in JP 2010-24438 A. All of liquid crystal compounds B1, B2, and B3 were liquid crystal compounds exhibiting a nematic liquid crystal phase. Liquid crystal compound B1: Liquid crystal compound B2: Liquid crystal compound B3:

[0226] The following dichroic dyes were used, each of which is described in JP-A-2022-174723: Dichroic dye 1 (cyan dye 1): has a maximum absorption peak in the range of 600 to 650 nm (measured in a liquid crystal compound and in chloroform). Dichroic dye 2 (cyan dye 2): has a maximum absorption peak in the range of 600 to 650 nm (measured in a liquid crystal compound and in chloroform) Dichroic dye 3 (magenta dye): has a maximum absorption peak in the range of 500 to 550 nm (measured in a liquid crystal compound and in chloroform) Dichroic dye 4 (yellow dye 1): has a maximum absorption peak in the range of 440 to 490 nm (measured in a liquid crystal compound and in chloroform) Dichroic dye 5 (yellow dye 2): has a maximum absorption peak in the range of 380 to 430 nm (measured in a liquid crystal compound and in chloroform)

[0227] Carbon black: Aqua-Black (registered trademark) 001 manufactured by Tokai Carbon Co., Ltd., which has absorption in the visible region of 400 to 700 nm, was used.

[0228] Functional layer-forming compositions 1 to 4 were prepared according to the following formulations: (i) Functional layer-forming composition 1 Functional layer-forming composition 1 was obtained by stirring the following components at 80° C. for 2 hours. Liquid crystal compound A1 75 parts Liquid crystal compound A2 25 parts Dichroic dye 1 1.5 parts Dichroic dye 2 0.8 parts Dichroic dye 3 2.2 parts Dichroic dye 4 2.5 parts Dichroic dye 5 1.7 parts Polymerization initiator: 2-dimethylamino-2-benzyl-1-(4-morpholinophenyl)butan-1-one (Irgacure 369; manufactured by Chiba Specialty Chemicals Co., Ltd.) 6 parts Leveling agent: F-556 (Megafac F-556, manufactured by DIC Corporation) 1 part Crosslinking agent: dipentaerythritol hexaacrylate (A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.) 2 parts Solvent: o-xylene 650 parts

[0229] (ii) Functional Layer-Forming Composition 2 The following components were stirred at 80°C for 2 hours to obtain Functional Layer-Forming Composition 2. Liquid Crystal Compound A1 75 parts Liquid Crystal Compound A2 25 parts Dichroic Dye 1 3.0 parts Dichroic Dye 2 1.6 parts Dichroic Dye 3 4.4 parts Dichroic Dye 4 5.0 parts Dichroic Dye 5 3.4 parts Polymerization initiator: 2-dimethylamino-2-benzyl-1-(4-morpholinophenyl)butan-1-one (Irgacure 369; manufactured by Chiba Specialty Chemicals) 1 part Leveling agent: F-556 (Megafac F-556, manufactured by DIC Corporation) 1 part Crosslinking agent: dipentaerythritol hexaacrylate (A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.) 2 parts Solvent: o-xylene 650 parts

[0230] (iii) Functional Layer-Forming Composition 3 The following components were stirred at 60° C. for 2 hours to obtain Functional Layer-Forming Composition 3. Liquid crystal compound B1 80 parts Liquid crystal compound B2 13 parts Liquid crystal compound B3 7 parts Dichroic dye 1 1.5 parts Dichroic dye 2 0.8 parts Dichroic dye 3 2.2 parts Dichroic dye 4 2.5 parts Dichroic dye 5 1.7 parts Polymerization initiator: 2-dimethylamino-2-benzyl-1-(4-morpholinophenyl)butan-1-one (Irgacure 369, manufactured by Chiba Specialty Chemicals) 1 part Polymerization initiator: OXE03 (Irgacure OXE03, manufactured by BASF Japan Co., Ltd.) 4 parts Leveling agent: F-556 (Megafac F-556, manufactured by DIC Corporation) 1 part Crosslinking agent: dipentaerythritol hexaacrylate (A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.) 6 parts Antioxidant: dibutylhydroxytoluene (BHT) 0.3 parts Solvent: N-methyl-2-pyrrolidone 260 parts Solvent: cyclopentanone 390 parts

[0231] (iv) Functional Layer-Forming Composition 4 The following components were stirred at 25°C for 1 hour to obtain Functional Layer-Forming Composition 4: Carbon black (Aqua-Black (registered trademark) 001, manufactured by Tokai Carbon Co., Ltd.) 0.7 parts Polyvinyl alcohol (Z-200, manufactured by Mitsubishi Chemical Corporation) 3.8 parts Water 100 parts

[0232] Each of the curable compositions for forming a diffusion prevention layer was prepared according to the following formulation. (i) Curable composition (X) for forming a first diffusion prevention layer The curable composition (X) for forming a first diffusion prevention layer was obtained by stirring the following components at room temperature. Acrylate composition: 50 parts of dipentaerythritol hexaacrylate Urethane acrylate compound: 50 parts of urethane acrylate (manufactured by Daicel Allnex Corporation, "Ebecryl 4858") Radical polymerization initiator: 3 parts of 2-[4-(methylthio)benzoyl]-2-(4-morpholinyl)propane (manufactured by BASF, "Irgacure 907") Solvent: 10 parts of methyl ethyl ketone

[0233] (ii) Curable composition (Y) for forming second diffusion prevention layer A curable composition (Y) for forming a second diffusion prevention layer was obtained by stirring the following components at room temperature: Polyvinyl alcohol (Z-200, manufactured by Mitsubishi Chemical Corporation) 3.8 parts Water 100 parts

[0234] (2) Production of low-reflection film (i) Preparation of composition for forming low-reflection layer The following components were mixed to obtain a composition for forming a low-reflection layer. Low refractive index silica fine particles (average particle size 30 nm) 2.4 parts Ionizing radiation curable material: dipentaerythritol hexaacrylate (DPHA) 1.6 parts Silicone material: TSF44 (manufactured by Toshiba GE Silicones) 0.2 parts Photopolymerization initiator: Irgacure 184 (manufactured by Ciba Japan) 0.2 parts Solvent: isopropyl alcohol (boiling point 82.4°C) 72.2 parts, methyl isobutyl ketone 13.8 parts

[0235] (ii) Preparation of hard coat layer-forming composition The following components were mixed to obtain a hard coat layer-forming composition: Shiko UV-7605B (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) 100 parts Irgacure 184 (manufactured by Ciba-Geigy) 4 parts Methyl acetate 50 parts 2-butanone 50 parts

[0236] (iv) Preparation of Low Reflection Film 1 A 40 μm thick triacetyl cellulose film (KC4UY-TAC, manufactured by Konica Minolta, Inc.) was prepared as a substrate. The composition for forming a hard coat layer prepared above was applied onto the substrate. After drying, the composition was irradiated with ultraviolet light to form a hard coat layer with a film thickness of 10 μm. Next, the composition for forming a low reflection layer prepared above was applied onto the hard coat layer to form a coating film, which was then dried in an oven at 80° C. After drying, the film was irradiated with ultraviolet light at an integrated light dose of 384 mJ / cm 2 using an ultraviolet irradiator. ２ This resulted in the production of a low-reflection film 1 having a hard coat layer and a low-reflection layer on one surface of the triacetyl cellulose film (substrate).

[0237] (v) Average luminous reflectance and total luminous transmittance of low reflection film The average luminous reflectance and total luminous transmittance of low reflection film 1 were measured according to the above-mentioned measurement methods. The average luminous reflectance of low reflection film 1 was 0.45%, and the total luminous transmittance was 96.3%.

[0238] (3) Preparation of Functional Layers 1 to 3 with Diffusion Prevention Layer and Functional Layer 4 (i) Functional Layer 1 with Diffusion Prevention Layer After a release-treated surface of a polyethylene terephthalate film (SP-PLR382050 manufactured by Lintec Corporation) (release film) was subjected to a corona treatment, the curable composition (X) for forming the first diffusion prevention layer was applied by a bar coating method. Next, a UV irradiation device (SPOT CURE SP-7; manufactured by Ushio Inc.) was used to apply an exposure dose of 500 mJ / cm. ２

[0043] A release film with a diffusion preventing layer was obtained by irradiating a coating film of the curable composition (X) for forming a first diffusion preventing layer with ultraviolet light of wavelengths of 365 nm (reference wavelength), in which a first diffusion preventing layer was formed on the surface of the release film. The thickness of the obtained first diffusion preventing layer was measured using a laser microscope (OLS3000, manufactured by Olympus Corporation) and was found to be 2.0 μm.

[0239] The functional layer-forming composition 1 was applied to the surface of the first diffusion prevention layer of the release film with a diffusion prevention layer using a bar coater, and then dried for 1 minute in a drying oven set at 90° C. Next, ultraviolet light was irradiated using a high-pressure mercury lamp (Uniqure VB-15201BY-A, manufactured by Ushio Inc.) (under a nitrogen atmosphere, wavelength: 365 nm, cumulative light intensity at wavelength 365 nm: 500 mJ / cm). ２) to form functional layer 1, and a laminate consisting of release film / first diffusion barrier layer / functional layer 1 was obtained. The thickness of the obtained functional layer 1 was measured using a laser microscope (OLS3000, manufactured by Olympus Corporation) and was found to be 1.2 μm. In addition, X-ray diffraction measurement was performed on the surface of the obtained functional layer 1 opposite the first diffusion barrier layer using an X'Pert PRO MPD X-ray diffractometer (manufactured by Spectris Inc.). As a result, a sharp diffraction peak (Bragg peak) with a peak full width at half maximum (FWHM) of approximately 0.17° was obtained near 2θ = 20.2°. The order period (d) calculated from the peak position was approximately 4.4 Å, confirming the formation of a structure reflecting a high-order smectic phase. In addition, the three-dimensional absorbance of the functional layer was measured according to the measurement method described above.

[0240] Furthermore, the surface of the obtained functional layer 1 opposite to the first diffusion barrier layer was subjected to corona treatment, and then the curable composition for forming a second diffusion barrier layer (Y) was applied by bar coating and heated at 70°C for 3 minutes to form a second diffusion barrier layer. The thickness of the obtained second diffusion barrier layer was measured using a laser microscope (OLS3000, manufactured by Olympus Corporation) and found to be 1.1 μm. In this way, a functional layer 1 with a diffusion barrier layer was obtained, consisting of a release film / first diffusion barrier layer / functional layer 1 / second diffusion barrier layer.

[0241] (ii) Functional Layer 2 with Diffusion Prevention Layer: Functional Layer 2 with diffusion prevention layer was prepared in the same manner as Functional Layer 1 with diffusion prevention layer, except that Functional Layer 2 was formed using Functional Layer-forming Composition 2 instead of Functional Layer 1. The thickness of the obtained Functional Layer 2 was measured using a laser microscope (OLS3000, manufactured by Olympus Corporation) and found to be 1.2 μm. Furthermore, X-ray diffraction measurement was performed on the surface of the obtained Functional Layer 2 opposite the first diffusion prevention layer in the same manner as Functional Layer 1. Bragg peaks were obtained, and the order period (d) calculated from the peak position confirmed the formation of a structure reflecting a high-order smectic phase. Furthermore, the three-dimensional absorbance of the functional layer was measured according to the measurement method described above.

[0242] (iii) Functional Layer 3 with Diffusion Prevention Layer Functional Layer 3 with diffusion prevention layer was prepared in the same manner as Functional Layer 1 with diffusion prevention layer 1, except that Functional Layer 3 was formed using Functional Layer-forming Composition 3 instead of Functional Layer 1 and the drying temperature after bar coater application was set to 120°C. The thickness of the obtained Functional Layer 3 was measured using a laser microscope (OLS3000, manufactured by Olympus Corporation) and found to be 1.4 μm. Furthermore, when X-ray diffraction measurement was performed on the obtained Functional Layer 3 in the same manner as Functional Layer 1, Functional Layer 3 did not exhibit a Bragg peak in the X-ray diffraction measurement. Furthermore, the three-dimensional absorbance of the functional layer was measured according to the measurement method described above.

[0243] (iv) Functional Layer 4 After corona treatment was performed on a COP film (ZF-14-50) manufactured by Zeon Corporation, functional layer-forming composition 4 was applied to the corona-treated surface using a bar coater. Next, functional layer 4 was formed by heating for 3 minutes in an oven set at 70°C, and a laminate consisting of COP / functional layer 4 was obtained. The thickness of the obtained functional layer 4 was measured using a laser microscope (OLS3000 manufactured by Olympus Corporation) and was found to be 1.0 μm.

[0244] Example 1 (1) Preparation of Laminate 1 The substrate (TAC) side of low-reflection film 1 was bonded to the second diffusion prevention layer of functional layer 1 with a diffusion prevention layer, which consisted of release film / first diffusion prevention layer / functional layer 1 / second diffusion prevention layer, via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation), and the release film was then removed to obtain laminate 1, which consisted of low-reflection layer / hard coat layer / substrate (TAC) / adhesive layer / second diffusion prevention layer / functional layer 1 / first diffusion prevention layer. The resulting laminate 1 had a total light transmittance of 91.8% and an average luminous reflectance of 0.40%.

[0245] (2) Characteristic Evaluation of Laminate 1 (i) Reflective Appearance A panel (hereinafter abbreviated as "QD-OLED panel") obtained by removing the LR-TAC and adhesive layers from the outermost surface of a 4K organic EL television (A95K, manufactured by Sony Corporation) was attached to the first diffusion prevention layer side of laminate 1 measuring 10 cm x 10 cm via a 25 μm thick pressure-sensitive adhesive layer (manufactured by Lintec Corporation). This resulted in an evaluation sample consisting of, from the viewing side, a low-reflection layer / hard coat layer / substrate (TAC) / adhesive layer / second diffusion prevention layer / functional layer 1 / first diffusion prevention layer / pressure-sensitive adhesive layer / QD-OLED panel. Under fluorescent lighting, a light was shone on the evaluation sample so that the distance between the outermost layer on the viewing side and a penlight was 5 cm. The reflective appearance with the television off was visually confirmed and evaluated according to the following evaluation criteria. The results are shown in Table 1. (Evaluation criteria for reflective appearance) AA: Best, no blurring A: Good, no blurring B: Fair, mostly no blurring C: Poor, some blurring

[0246] (ii) Luminous brightness The luminous brightness of the evaluation samples was visually observed under fluorescent light with the television on, and evaluated according to the following evaluation criteria. The results are shown in Table 1. (Evaluation criteria for luminous brightness) A: Good, bright B: Slightly poor, slightly dark C: Poor, dark

[0247] (iii) Oblique hue The hue of the evaluation sample was confirmed visually from an oblique direction under fluorescent light with the television on, and evaluated according to the following evaluation criteria. The results are shown in Table 1. (Evaluation criteria for oblique hue) A: No hue, only a lightness gray color was observed B: Coloring other than gray was observed

[0248] Example 2 (1) Preparation of Laminate 2 The substrate (TAC) side of low-reflection film 1 and the second diffusion preventing layer of functional layer 1 with a diffusion preventing layer, consisting of release film / first diffusion preventing layer / functional layer 1 / second diffusion preventing layer, were bonded via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation), and the release film was then removed to obtain laminate 1 consisting of low-reflection layer / hard coat layer / substrate (TAC) / adhesive layer / second diffusion preventing layer / functional layer 1 / first diffusion preventing layer. Subsequently, the first diffusion preventing layer side of laminate 1 was bonded via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to the second diffusion preventing layer side of functional layer 1 with a diffusion preventing layer, consisting of release film / first diffusion preventing layer / functional layer 1 / second diffusion preventing layer, and the release film was removed to obtain laminate 2 in which functional layer 1 was laminated twice. That is, the laminate 2 consisted of a low-reflection layer / hard coat layer / substrate (TAC) / adhesive / second anti-diffusion layer / functional layer 1 / first anti-diffusion layer / adhesive / second anti-diffusion layer / functional layer 1 / first anti-diffusion layer. The total light transmittance of the obtained laminate 2 was 87.2%, and the average luminous reflectance was 0.35%. The three-dimensional absorbance of the functional layer in the laminate 2 was measured in a configuration of functional layer 1 / adhesive / functional layer 1 / adhesive / glass. The adhesive used here was a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation). The measurement was performed in the same manner as the measurement method for the three-dimensional absorbance of each functional layer.

[0249] (2) Evaluation of Properties of Laminate 2 The first diffusion prevention layer side of Laminate 2 was bonded to a QD-OLED panel via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to prepare an evaluation sample. The reflective appearance, luminance, and oblique hue of the evaluation sample were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0250] Example 3 (1) Preparation of Laminate 3 A laminate 3 consisting of a low-reflection layer / hard coat layer / substrate (TAC) / pressure-sensitive adhesive layer / second diffusion prevention layer / functional layer 2 / first diffusion prevention layer was obtained in the same manner as above, except that the diffusion prevention layer-attached functional layer 2 was used instead of the diffusion prevention layer-attached functional layer 1. The total light transmittance of the obtained laminate 3 was 88.2%, and the average luminous reflectance was 0.35%.

[0251] (2) Evaluation of Properties of Laminate 3 The first diffusion prevention layer side of Laminate 3 was bonded to a QD-OLED panel via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to prepare an evaluation sample. The reflective appearance, luminance, and oblique hue of the evaluation sample were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0252] Example 4 (1) Preparation of Laminate 4 Laminate 4 consisting of low-reflection layer / hard coat layer / substrate (TAC) / pressure-sensitive adhesive layer / second diffusion prevention layer / functional layer 3 / first diffusion prevention layer was obtained in the same manner as above, except that functional layer 3 with diffusion prevention layer was used instead of functional layer 1 with diffusion prevention layer 1. The total light transmittance of the obtained laminate 4 was 84.3%, and the average luminous reflectance was 0.32%.

[0253] (2) Evaluation of Properties of Laminate 4 The first diffusion prevention layer side of Laminate 4 was bonded to a QD-OLED panel via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to prepare an evaluation sample. The reflective appearance, luminance, and oblique hue of the evaluation sample were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0254] Example 5 (1) Preparation of Laminate 5 The substrate (TAC) side of low-reflection film 1 and the second diffusion preventing layer of functional layer 1 with diffusion preventing layer, consisting of release film / first diffusion preventing layer / functional layer 1 / second diffusion preventing layer, were bonded via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation), and the release film was then removed to obtain laminate 5 consisting of first diffusion preventing layer / functional layer 1 / second diffusion preventing layer / adhesive layer / substrate (TAC) / hard coat layer / low-reflection layer. The resulting laminate 5 had a total light transmittance of 91.6% and an average luminous reflectance of 0.60%.

[0255] (2) Evaluation of Properties of Laminate 5 The low-reflection layer side of Laminate 5 was bonded to a QD-OLED panel via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to prepare an evaluation sample. The reflective appearance, luminance, and oblique hue of the evaluation sample were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0256] Example 6 (1) Preparation of Laminate 6 The low-reflection layer side of the low-reflection film 1 was bonded to the second diffusion prevention layer of the diffusion prevention layer-attached functional layer 1, which consisted of a release film / first diffusion prevention layer / functional layer 1 / second diffusion prevention layer, via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation), and the release film was then removed to obtain a laminate 6, which consisted of a substrate (TAC) / hard coat layer / low-reflection layer / adhesive layer / second diffusion prevention layer / functional layer 1 / first diffusion prevention layer. The resulting laminate 6 had a total light transmittance of 91.6% and an average luminous reflectance of 0.46%.

[0257] (2) Evaluation of Properties of Laminate 6 The first diffusion prevention layer side of laminate 6 was bonded to a QD-OLED panel via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to prepare an evaluation sample. The reflective appearance, luminance, and oblique hue of the evaluation sample were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0258] Comparative Example 1 An evaluation sample consisting of a low-reflection layer / hard coat layer / substrate / pressure-sensitive adhesive layer / QD-OLED panel was obtained in the same manner as in Example 1, except that low-reflection film 1 was used instead of laminate 1. The reflective appearance, luminance, and oblique hue of the evaluation sample were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0259] Comparative Example 2 (1) Preparation of Laminate 7 With reference to JP 2020-095255 A, a laminate 7 (circularly polarizing plate) was obtained, which had a polarizer in which iodine was adsorbed and aligned on a polyvinyl alcohol resin film. The layer structure of laminate 7 consisted of COP (substrate) / acrylic pressure-sensitive adhesive layer / hard coat layer / TAC / UV adhesive layer / PVA polarizer / UV adhesive layer / λ / 4 plate (stretched film) / vertically aligned liquid crystal cured film. The total light transmittance of the obtained laminate 7 was 46.5%, and the average luminous reflectance was 0.09%. Furthermore, the three-dimensional absorbance of the PVA polarizer was measured according to the measurement method described above.

[0260] (2) Evaluation of Properties of Laminate 7 The vertically aligned liquid crystal cured film side of Laminate 7 was bonded to a QD-OLED panel via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to prepare an evaluation sample. The reflective appearance, luminance, and oblique hue of the evaluation sample were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0261] <Comparative Example 3> (1) Preparation of Laminate 8 The substrate (TAC) side of the low-reflection film 1 and the functional layer 4 side of the COP / functional layer 4 were bonded together via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to obtain a laminate 8 consisting of low-reflection layer / substrate (TAC) / adhesive layer / functional layer 4 / COP. The total light transmittance of the obtained laminate 8 was 86.4%, and the average luminous reflectance was 0.68%.

[0262] (2) Evaluation of Properties of Laminate 8 The COP side of laminate 8 was bonded to a QD-OLED panel via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to prepare an evaluation sample. The reflective appearance, luminance, and oblique hue of the evaluation sample were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0263] Comparative Example 4 (1) Preparation of Laminate 9 The functional layer 1 with a diffusion prevention layer was used as the laminate 9. The total light transmittance of the laminate 9 was 95.5%, and the average luminous reflectance was 0.50%.

[0264] (2) Evaluation of Properties of Laminate 9 The second diffusion prevention layer side of laminate 9 was bonded to a QD-OLED panel via a 25 μm pressure-sensitive adhesive (manufactured by Lintec Corporation) to prepare an evaluation sample consisting of first diffusion prevention layer / functional layer 1 / second diffusion prevention layer / pressure-sensitive adhesive layer / QD-OLED panel. The reflective appearance, luminance, and oblique hue of this evaluation sample were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0265]

[0266] DESCRIPTION OF SYMBOLS 1: Laminate 11: Low-reflection layer 12: Substrate 13: Functional layer 14: Pressure-sensitive adhesive layer 15: Diffusion-preventing layer 16: Hard coat layer 17: Antifouling layer 21: Anti-reflection film

Claims

1. A laminate comprising a low-reflection film and a functional layer, wherein the low-reflection film has an average luminous reflectance of 0.05% or more and 5% or less and a total light transmittance of 93% or more, and the functional layer is a cured film in which a liquid crystalline compound and a dichroic dye are cured in a state where they are oriented perpendicular to the layer plane.

2. The laminate according to claim 1, wherein the dichroic dye comprises a combination of at least one cyan dye, at least one magenta dye, and at least one yellow dye.

3. The laminate according to claim 1, wherein the low-reflection film comprises a low-reflection layer and a substrate.

4. The laminate according to claim 3, comprising a low-reflection layer, a substrate, and a functional layer in this order.

5. The laminate according to claim 1, wherein the functional layer does not exhibit a Bragg peak in X-ray diffraction measurement.

6. The laminate according to claim 1, wherein the low-reflection film includes an antifouling layer on the outermost surface opposite to the side on which the functional layer of the low-reflection film is laminated.

7. The laminate according to claim 1, wherein the average luminous reflectance of the entire laminate is 0.01% or more and 1% or less, and the total light transmittance is 75% or more.

8. The laminate according to claim 1 for use in a quantum dot organic EL display device.

9. A display device comprising the laminate according to claim 1 and a quantum dot organic EL light-emitting panel.

10. The display device according to claim 9, wherein the low-reflection film is located on the viewing side of the functional layer.

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