JP6365942B2 - Display device with touch panel - Google Patents

Description

  The present invention relates to a display device with a touch panel.

  Conventionally, a display device with a touch panel in which a touch panel is arranged on a display panel such as a liquid crystal display is known. In such a display device with a touch panel, information can be directly input by touching the image display surface with a finger or the like.

  When the touch panel is fixed on the display panel, the display panel and the touch panel are often arranged apart from each other, that is, the display panel and the touch panel are often arranged via an air layer (air gap) (for example, , See Patent Document 1).

JP 2010-15154 A

  The image display surface of a display device with a touch panel may be strongly pressed not only by touching with a finger but also by a finger. When the image display surface is pressed strongly, the touch panel is deformed, so that the distance between the touch panel and the display panel is narrowed (the thickness of the air layer is reduced), and the light reflected from the surface of the touch panel on the display panel side There is a possibility that interference fringes (Newton rings) may occur due to interference with light reflected by the surface of the display panel on the touch panel side.

  On the other hand, in recent years, display devices with a touch panel are becoming thinner and larger in area. As the display device with a touch panel becomes thinner, the distance between the touch panel and the display panel becomes narrower, and as the display device with a touch panel becomes larger, the touch panel is easily deformed. For this reason, there exists a possibility that the problem of an above-mentioned interference fringe may become remarkable.

  The present invention has been made to solve the above problems. That is, an object of the present invention is to provide a touch panel that can make interference fringes generated when an image display surface is strongly pressed invisible.

  According to one aspect of the present invention, there is provided a display device with a touch panel comprising a display panel for displaying an image, and a touch panel disposed closer to an observer than the display panel, wherein the display panel displays A first antireflection film disposed on the viewer side of the device and the display device, the first transparent substrate, the first hard coat layer, and the first layer facing the viewer side And a first antireflection film in which the surface of the first antireflection film forms a surface on the viewer side of the display panel, and the touch panel includes a sensor unit. And the second antireflection film disposed closer to the display panel than the sensor unit and spaced from the first antireflection film, wherein the second transparent substrate is directed toward the display panel. Material and second hard A second antireflection film, wherein the second antireflection layer is laminated in this order, and the surface of the second antireflection film forms the surface of the touch panel on the display panel side, Provided is a display device with a touch panel, wherein the reflection Y value measured from the surface side in the first antireflection film and the reflection Y value measured from the surface side in the second antireflection film are each less than 0.3%. The

  According to the touch panel of one aspect of the present invention, the reflection Y value measured from the surface side in the first antireflection film and the reflection Y value measured from the surface side in the second antireflection film are each less than 0.3%. Therefore, interference fringes generated when the image display surface is strongly pressed can be made invisible.

It is a schematic block diagram of the display apparatus with a touch panel which concerns on embodiment. It is a schematic block diagram of the display panel which concerns on embodiment. It is a schematic block diagram of the touchscreen which concerns on embodiment. It is a figure which shows the 1st antireflection film and 2nd antireflection film periphery which concern on embodiment.

  Hereinafter, a display device with a touch panel according to an embodiment of the present invention will be described with reference to the drawings. In this specification, “film” includes members called “sheets”, “plates” and the like. In the present specification, the “weight average molecular weight” is a value obtained by dissolving in a solvent such as tetrahydrofuran (THF) and converting to polystyrene by a conventionally known gel permeation chromatography (GPC) method. FIG. 1 is a schematic configuration diagram of a display device with a touch panel according to the present embodiment, and FIG. 2 is a schematic configuration diagram of a display panel according to the present embodiment. FIG. 3 is a schematic configuration diagram of the touch panel according to the present embodiment, and FIG. 4 is a view showing the periphery of the first antireflection film and the second antireflection film according to the present embodiment.

[Display device with touch panel]
As shown in FIG. 1, the display device 10 with a touch panel mainly includes a display panel 20 for displaying an image, a touch panel 40 disposed closer to the viewer than the display panel 20, and the back surface of the display panel 20. And a backlight unit 80 disposed on the side. In the present embodiment, since the display panel 20 is a liquid crystal display panel, the display device with a touch panel 10 includes the backlight unit 80. However, depending on the type of the display panel (display element), the display unit 20 includes the backlight unit 80. Not necessary. The display panel 20 and the touch panel 40 are arranged via an air layer (air gap) 11. In the present embodiment, the display panel 20 and the touch panel 40 are arranged via the air layer 11, but a surface 29A of a first antireflection film 29 and a surface 60A of a second antireflection film 60 described later are provided. As long as it is spaced apart, it may be affixed by the transparent adhesive layer.

[Display panel]
As shown in FIG. 2, the display panel 20 has a protective film 21, such as a triacetyl cellulose film (TAC film), a polarizing element 22, a retardation film 23, a transparent film, from the backlight unit 80 side toward the viewer side. The adhesive layer 24, the display element 25, the transparent adhesive layer 26, the retardation film 27, the polarizing element 28, and the first antireflection film 29 are laminated in this order. The display panel 20 only needs to include the display element 25 and the first antireflection film 29 disposed closer to the viewer than the display element 25, and does not need to include the protective film 21 or the like.

  Examples of the retardation films 23 and 27 include a triacetyl cellulose film and a cycloolefin polymer film. The retardation film 27 may be the same as the protective film 21. As a transparent adhesive which comprises the transparent adhesive layers 24 and 26, a pressure sensitive adhesive (PSA) is mentioned.

  The display element 25 is a liquid crystal display element. However, the display element is not limited to the liquid crystal display element, and may be, for example, an organic EL display element. In the liquid crystal display element, a liquid crystal layer, an alignment film, an electrode layer, a color filter, and the like are disposed between two glass substrates.

≪First antireflection film≫
The first antireflection film 29 has a structure in which the first transparent base material 30, the first hard coat layer 31, and the first antireflection layer 32 are laminated in this order toward the viewer. Have. The surface 29A of the first antireflection film 29 forms the surface 20A on the viewer side of the display panel 20.

  In the first antireflection film 29, the reflection Y value measured from the surface 29A side (first antireflection layer 32 side) is less than 0.3%. The reflection Y value is preferably 0.15% or less, and more preferably 0.1% or less, from the viewpoint of making the interference fringes more invisible.

  The reflection Y value is based on JIS Z8722. The reflection Y value is obtained by irradiating light having an incident angle of 5 degrees from the first antireflection layer side of the first antireflection film using a spectrophotometer such as MPC3100 manufactured by Shimadzu Corporation. Software that receives the reflected light in the specular direction reflected by the anti-reflection film, measures the reflectance in the wavelength range of 380 nm to 780 nm, and then converts it to the brightness perceived by the human eye (for example, built in MPC3100 Software). In this specification, “light having an incident angle of 5 degrees” means light inclined by 5 degrees with respect to the normal direction when the normal direction of the film surface of the first antireflection film is set to 0 degrees. To do. The “film surface” refers to a surface that coincides with the plane direction when the first antireflection film as a target is viewed as a whole and globally. In addition, when measuring a reflection Y value, in order to prevent the back surface reflection of a 1st antireflection film, the surface on the opposite side to the surface in which the 1st hard-coat layer in the 1st transparent base material is formed previously. It is preferable to stick a black tape on.

  The first antireflection film 29 having a reflection Y value of less than 0.3% mainly includes the refractive index and film thickness of the first low refractive index layer 34 and / or the refraction of the first high refractive index layer 33. It can be obtained by adjusting the rate and the film thickness.

  The ten-point average roughness (Rzjis) of the surface 29A of the first antireflection film 29 may be 10 nm or more and 100 nm or less (for example, 40 nm or more and 60 nm or less) or more than 100 nm and 500 nm or less. Therefore, the surface 29A of the first antireflection film 29 does not necessarily have to be flat, and may be an uneven surface to the extent that a slight antiglare property can be obtained. The definition of Rzjis shall conform to JIS B0601-2001.

  When the ten-point average roughness of the surface of the first antireflection film or the second antireflection film described later is large, the cloudiness may occur. On the other hand, the second antireflection film is the first antireflection film. Since it is located closer to the viewer, it is easier for the viewer to visually recognize the cloudiness of the second antireflection film than when the cloudiness of the first antireflection film is generated. Therefore, the ten-point average roughness of the surface 29A of the first antireflection film 29 may be more than 100 nm and 500 nm or less. However, in order to prevent the observer from recognizing that the cloudiness is generated, The ten-point average roughness of the surface 60A of the antireflection film 60 is preferably 10 nm or more and 100 nm or less. On the other hand, when the 10-point average roughness of the surface 29A of the first antireflection film 29 and the 10-point average roughness of the surface 60A of the second antireflection film 60 are both 10 nm or more and 100 nm or less. Since the observer does not recognize that the first antireflection film 29 and the second antireflection film 60 have a cloudiness, the ten-point average roughness of the surface 60A of the second antireflection film 60 is: The ten-point average roughness of the surface 29A of the first antireflection film 29 may be larger or smaller. In the present specification, the “surface of the first antireflection film” means a surface of the first antireflection film opposite to the surface on the display element side. “The surface of the second antireflection film” means the surface of the second antireflection film opposite to the surface on the viewer side. In FIG. 2, the surface 29A of the first antireflection film 29 is the surface of the first antireflection layer 32 (the surface of the first low refractive index layer 34), and in FIG. The surface 60A of the antireflection film 60 is the surface of the second antireflection layer 63 (the surface of the second low refractive index layer 65).

After pasting the first antireflection film 29 and the second antireflection film 60 on a glass plate having a thickness of 0.8 mm, respectively, the surface 29A of the first antireflection film 29 and the second antireflection film 60 are attached. The second glass plate with the second antireflection film is stacked on the first glass plate with the antireflection film so that the surface 60A of the second electrode is in contact with the second antireflection film in the glass plate with the second antireflection film. Whether a load of 2000 g / cm ² is applied from the surface opposite to the surface on the 60 side, then the load is removed, and the first antireflection film 29 and the second antireflection film 60 are adhered in that state. When evaluating whether or not, it is preferable that the first antireflection film 29 and the second antireflection film 60 are not attached. The above “the first antireflection film and the second antireflection film are not attached” means that the glass plate with the second antireflection film was slid with respect to the glass plate with the first antireflection film. Sometimes, it means that the glass plate with the second antireflection film moves smoothly, or moves with a slight catch. Since the first antireflection film 29 and the second antireflection film 60 are not attached, even if the touch panel is strongly pressed with a finger or the like and the touch panel 40 and the display panel 20 are in contact with each other, the first antireflection film 29 and the second antireflection film 60 are peeled off immediately. The touch panel 40 can be restored in a short time.

<First transparent substrate>
The first transparent substrate 30 is not particularly limited as long as it has optical transparency. For example, a cellulose acylate substrate, a cycloolefin polymer substrate, a polycarbonate substrate, an acrylic substrate, a polyester substrate, or glass A base material is mentioned.

  Examples of the cellulose acylate base material include a triacetyl cellulose base material and a diacetyl cellulose base material. A triacetylcellulose base material is a base material which can make an average light transmittance 50% or more in a visible light region of 380 to 780 nm. The average light transmittance of the triacetyl cellulose base material is preferably 70% or more, and more preferably 85% or more.

  In addition, as a triacetyl cellulose base material, in addition to pure triacetyl cellulose, cellulose acetate propionate, cellulose acetate butyrate and the like may be used in combination with components other than acetic acid as a fatty acid forming an ester with cellulose. Good. Further, these triacetylcelluloses may be added with other additives such as other cellulose lower fatty acid esters such as diacetylcellulose, or plasticizers, ultraviolet absorbers, and lubricants as necessary.

As a cycloolefin polymer base material, the base material which consists of polymers, such as a norbornene-type monomer and a monocyclic cycloolefin monomer, is mentioned, for example.

  Examples of the polycarbonate substrate include aromatic polycarbonate substrates based on bisphenols (bisphenol A and the like), aliphatic polycarbonate substrates such as diethylene glycol bisallyl carbonate, and the like.

  Examples of the acrylic base material include a poly (meth) methyl acrylate base material, a poly (meth) ethyl acrylate base material, and a (meth) methyl acrylate- (meth) butyl acrylate copolymer base material. .

  Examples of the polyester base material include base materials containing at least one of polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate as constituent components.

  Examples of the glass substrate include glass substrates such as soda lime silica glass, borosilicate glass, and alkali-free glass.

  Among these, an acrylic base material is preferable from the following viewpoints. Although a polarizing element is provided on the surface of the first transparent substrate on the display element side, there is a possibility that iodine in the polarizing element elutes due to moisture. Therefore, in order to suppress elution of iodine in the polarizing element, an acrylic base material that is a base material having low moisture permeability is preferable.

  The thickness of the first transparent substrate 30 is not particularly limited, but can be 5 μm or more and 100 μm or less, and the lower limit of the thickness of the first transparent substrate 30 is preferably 15 μm or more from the viewpoint of handling properties. 25 μm or more is more preferable. The upper limit of the thickness of the first transparent substrate 30 is preferably 80 μm or less from the viewpoint of thinning.

<First hard coat layer>
The first hard coat layer 31 is a layer having a hardness of “H” or higher in a pencil hardness test (4.9 N load) defined by JIS K5600-5-4 (1999). By setting the pencil hardness to “H” or higher, the hardness of the first hard coat layer 31 can be sufficiently reflected on the surface of the first antireflection layer 32, and the durability can be improved. From the viewpoint of adhesion to the first antireflection layer 32 formed on the first hard coat layer 31, toughness and prevention of curling, the upper limit of the pencil hardness on the surface of the first hard coat layer 31 is 4H. It is preferable to set the degree.

  The film thickness of the first hard coat layer 31 is preferably 1 μm or more and 10 μm or less. If the film thickness of the first hard coat layer 31 is within this range, desired hardness can be obtained and the first hard coat layer can be made thinner. The film thickness of the hard coat layer can be determined by observing the cross section of the hard coat layer with a scanning electron microscope (SEM). Specifically, using a scanning electron microscope image, the film thickness of three hard coat layers is measured in one image, and this is performed for five images, and the average value of the measured film thickness is calculated.

  The lower limit of the film thickness of the first hard coat layer 31 is more preferably 8 μm or less from the viewpoint of suppressing cracking of the first hard coat layer. Further, from the viewpoint of suppressing curling while reducing the thickness of the first hard coat layer, the thickness of the first hard coat layer 31 is more preferably 0.5 μm or more and 5.0 μm or less. .

  The refractive index of the first hard coat layer 31 may be 1.50 or more and 1.60 or less. The lower limit of the refractive index of the first hard coat layer 31 may be 1.52 or more, and the upper limit of the refractive index of the first hard coat layer 31 may be 1.56 or less. The refractive index difference between the first transparent base material 30 and the first hard coat layer 31 is preferably within 0.10, and preferably within 0.06, from the viewpoint of making the interference fringes more invisible. More preferred.

  The refractive index of the first hard coat layer 31 can be measured with an Abbe refractometer (NAR-4T manufactured by Atago Co., Ltd.) or an ellipsometer after forming a single layer. Moreover, as a method of measuring the refractive index after becoming the first antireflection film 29, the first hard coat layer 31 is scraped off with a cutter or the like to prepare a powder sample, and JIS K7142 (2008) B method. Becke method (for powder or granular transparent material) (using a Cargill reagent with a known refractive index, place the powdered sample on a glass slide, drop the reagent onto the sample, and sample with the reagent. A method of making the refractive index of the sample the refractive index of the reagent in which the Becke line cannot be visually observed by observing the state by microscopic observation, and the difference in refractive index between the sample and the reagent. ) Can be used.

  The first hard coat layer 31 can be composed of at least a resin. In addition to the resin, fine particles may be included.

<resin>
The resin contains a polymerized product (crosslinked product) of a photopolymerizable compound. The resin may contain a solvent-drying resin or a thermosetting resin in addition to a polymer (cross-linked product) of a photopolymerizable compound. The photopolymerizable compound has at least one photopolymerizable functional group. In the present specification, the “photopolymerizable functional group” is a functional group capable of undergoing a polymerization reaction by light irradiation. Examples of the photopolymerizable functional group include ethylenic double bonds such as a (meth) acryloyl group, a vinyl group, and an allyl group. In the present specification, “(meth) acryloyl group” means both “acryloyl group” and “methacryloyl group”. The light irradiated when polymerizing the photopolymerizable compound includes visible light and ionizing radiation such as ultraviolet rays, X-rays, electron beams, α rays, β rays, and γ rays.

  Examples of the photopolymerizable compound include a photopolymerizable monomer, a photopolymerizable oligomer, and a photopolymerizable polymer, and these can be appropriately adjusted and used. As the photopolymerizable compound, a combination of a photopolymerizable monomer and a photopolymerizable oligomer or photopolymerizable polymer is preferable.

(Photopolymerizable monomer)
The photopolymerizable monomer has a weight average molecular weight of less than 1000. The photopolymerizable monomer is preferably a polyfunctional monomer having two or more photopolymerizable functional groups (that is, bifunctional).

  Examples of the bifunctional or higher monomer include trimethylolpropane tri (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, and pentaerythritol tri (meth). Acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditri Methylolpropane tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, tripentaerythritol octa (meth) acrylate, Lapentaerythritol deca (meth) acrylate, isocyanuric acid tri (meth) acrylate, isocyanuric acid di (meth) acrylate, polyester tri (meth) acrylate, polyester di (meth) acrylate, bisphenol di (meth) acrylate, diglycerin tetra ( (Meth) acrylate, adamantyl di (meth) acrylate, isoboronyl di (meth) acrylate, dicyclopentane di (meth) acrylate, tricyclodecane di (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, and these are PO, EO And the like modified.

  Among these, from the viewpoint of obtaining a first transparent layer having high hardness, pentaerythritol triacrylate (PETA), dipentaerythritol hexaacrylate (DPHA), pentaerythritol tetraacrylate (PETTA), dipentaerythritol pentaacrylate (DPPA), etc. Is preferred.

(Photopolymerizable oligomer)
The photopolymerizable oligomer has a weight average molecular weight of 1000 or more and less than 10,000. The photopolymerizable oligomer is preferably a bifunctional or higher polyfunctional oligomer. Polyfunctional oligomers include polyester (meth) acrylate, urethane (meth) acrylate, polyester-urethane (meth) acrylate, polyether (meth) acrylate, polyol (meth) acrylate, melamine (meth) acrylate, and isocyanurate (meth). Examples include acrylate and epoxy (meth) acrylate.

(Photopolymerizable polymer)
The photopolymerizable polymer has a weight average molecular weight of 10,000 or more, and the weight average molecular weight is preferably from 10,000 to 80,000, more preferably from 10,000 to 40,000. When the weight average molecular weight exceeds 80,000, the viscosity is high, so that the coating suitability is lowered, and the appearance of the obtained optical laminate may be deteriorated. Examples of the polyfunctional polymer include urethane (meth) acrylate, isocyanurate (meth) acrylate, polyester-urethane (meth) acrylate, and epoxy (meth) acrylate.

  The solvent-drying resin is a resin that forms a film only by drying a solvent added to adjust the solid content during coating, such as a thermoplastic resin. When the solvent-drying type resin is added, film defects on the coating surface of the coating liquid can be effectively prevented when the first transparent layer 14 is formed. It does not specifically limit as solvent dry type resin, Generally, a thermoplastic resin can be used.

  Examples of thermoplastic resins include styrene resins, (meth) acrylic resins, vinyl acetate resins, vinyl ether resins, halogen-containing resins, alicyclic olefin resins, polycarbonate resins, polyester resins, polyamide resins. , Cellulose derivatives, silicone resins and rubbers or elastomers.

  The thermoplastic resin is preferably amorphous and soluble in an organic solvent (particularly a common solvent capable of dissolving a plurality of polymers and curable compounds). In particular, from the viewpoint of transparency and weather resistance, styrene resins, (meth) acrylic resins, alicyclic olefin resins, polyester resins, cellulose derivatives (cellulose esters, etc.) and the like are preferable.

  The thermosetting resin is not particularly limited. For example, phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine-urea cocondensation Examples thereof include resins, silicon resins, polysiloxane resins, and the like.

<Fine particles>
The fine particles may be inorganic fine particles, organic fine particles, or a mixture thereof. Examples of the inorganic fine particles include inorganic oxide fine particles such as silica (SiO ₂ ) fine particles, alumina fine particles, titania fine particles, tin oxide fine particles, antimony-doped tin oxide (abbreviated as ATO) fine particles, and zinc oxide fine particles.

  Examples of the organic fine particles include plastic fine particles. Specific examples of the plastic fine particles include polystyrene fine particles, melamine resin fine particles, acrylic fine particles, acrylic-styrene copolymer fine particles, silicone fine particles, benzoguanamine fine particles, benzoguanamine / formaldehyde condensation fine particles, polycarbonate fine particles, polyethylene fine particles, and the like.

  In order to form the first hard coat layer 31, first, a first hard coat layer composition containing at least a photopolymerizable compound is applied to the surface of the first transparent substrate 30. Next, the film-like first hard coat layer composition is conveyed to a heated zone for drying, and the first hard coat layer composition is dried by various known methods to evaporate the solvent. . Then, the first hard coat layer composition is cured by irradiating the coating-like first hard coat layer composition with light such as ultraviolet rays to polymerize (crosslink) the photopolymerizable compound. Then, the first hard coat layer 31 is formed.

  Examples of the method for applying the first hard coat layer composition include known coating methods such as spin coating, dipping, spraying, slide coating, bar coating, roll coating, gravure coating, and die coating. Can be mentioned.

  When ultraviolet rays are used as the light for curing the first hard coat layer composition, ultraviolet rays emitted from ultra-high pressure mercury lamps, high pressure mercury lamps, low pressure mercury lamps, carbon arcs, xenon arcs, metal halide lamps, etc. are used. it can. Moreover, as a wavelength of an ultraviolet-ray, the wavelength range of 190-380 nm can be used. Specific examples of the electron beam source include various electron beam accelerators such as a cockcroft-wald type, a bandegraft type, a resonant transformer type, an insulated core transformer type, a linear type, a dynamitron type, and a high frequency type.

  You may add the said microparticles | fine-particles, the said thermoplastic resin, the said thermosetting resin, a solvent, and a polymerization initiator to the 1st composition for hard-coat layers as needed. Further, the first transparent layer composition may include conventionally known dispersants and surfactants depending on purposes such as increasing the hardness of the first transparent layer, suppressing curing shrinkage, and controlling the refractive index. , Antistatic agent, silane coupling agent, thickener, anti-coloring agent, coloring agent (pigment, dye), antifoaming agent, leveling agent, flame retardant, UV absorber, adhesion promoter, polymerization inhibitor, antioxidant An agent, a surface modifier, a lubricant, etc. may be added.

<solvent>
Examples of the solvent include alcohols (eg, methanol, ethanol, propanol, isopropanol, n-butanol, s-butanol, t-butanol, benzyl alcohol, PGME, ethylene glycol), ketones (acetone, methyl ethyl ketone (MEK), cyclohexanone. , Methyl isobutyl ketone, diacetone alcohol, cycloheptanone, diethyl ketone, etc.), ethers (1,4-dioxane, dioxolane, diisopropyl ether dioxane, tetrahydrofuran, etc.), aliphatic hydrocarbons (hexane, etc.), alicyclic Hydrocarbons (cyclohexane, etc.), aromatic hydrocarbons (toluene, xylene, etc.), halogenated carbons (dichloromethane, dichloroethane, etc.), esters (methyl formate, methyl acetate, ethyl acetate, vinegar) Propyl, butyl acetate, ethyl lactate, etc.), cellosolves (methyl cellosolve, ethyl cellosolve, butyl cellosolve, etc.), cellosolve acetates, sulfoxides (dimethylsulfoxide etc.), amides (dimethylformamide, dimethylacetamide etc.), etc. A mixture thereof may be used.

<Leveling agent>
Although it does not specifically limit as a leveling agent, The non-polymerizable fluorine-containing compound which does not have a photopolymerizable functional group from a viewpoint which improves antifouling property so that it may mention later is preferable. Among the non-polymerizable fluorine-containing compounds, compounds having a weight average molecular weight of 30,000 to 40,000 are preferable. Examples of such commercially available non-polymerizable fluorine-containing compounds include F568 and F477 manufactured by DIC.

  The leveling agent content in the first hard coat layer composition is preferably 0.01 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the photopolymerizable compound. By setting the content of the leveling agent within this range, the flatness of the surface of the hard coat layer can be sufficiently ensured.

<Polymerization initiator>
The polymerization initiator is a component that is decomposed by light irradiation to generate radicals to initiate or advance polymerization (crosslinking) of the photopolymerizable compound.

  The polymerization initiator is not particularly limited as long as it can release a substance that initiates radical polymerization by light irradiation. The polymerization initiator is not particularly limited, and known ones can be used. Specific examples include, for example, acetophenones, benzophenones, Michler benzoylbenzoate, α-amyloxime ester, thioxanthones, propiophenone. , Benzyls, benzoins, acylphosphine oxides. In addition, it is preferable to use a mixture of photosensitizers, and specific examples thereof include n-butylamine, triethylamine, poly-n-butylphosphine, and the like.

  As the polymerization initiator, when the binder resin is a resin system having a radically polymerizable unsaturated group, it is preferable to use acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether or the like alone or in combination. .

  The content of the polymerization initiator in the first hard coat layer composition is preferably 0.5 parts by mass or more and 10.0 parts by mass or less with respect to 100 parts by mass of the photopolymerizable compound. By setting the content of the polymerization initiator within this range, the hard coat performance can be sufficiently maintained, and curing inhibition can be suppressed.

  Although it does not specifically limit as a content rate (solid content) of the raw material in the composition for 1st transparent layers, Usually, 5 to 70 mass% is preferable, and it is set to 25 to 60 mass%. More preferred.

<First antireflection layer>
The configuration of the first antireflection layer 32 is not particularly limited as long as the reflection Y value is less than 0.3%. For example, the first antireflection layer 32 may include a first high refractive index layer 33 and a first low refractive index layer 34 provided on the first high refractive index layer 33. However, the present invention is not limited to this, and the first low refractive index layer 34 may be used alone. However, from the viewpoint of obtaining excellent scratch resistance and antifouling properties, the first antireflection layer 32 may be composed of a first high refractive index layer 33 and a first low refractive index layer 34. preferable.

(First high refractive index layer)
The first high refractive index layer 33 is a layer having a refractive index higher than that of the first hard coat layer 31. Specifically, the refractive index of the first high refractive index layer 33 may be 1.50 or more and 2.00 or less. The lower limit of the refractive index of the first high refractive index layer 33 may be 1.60 or more, and the upper limit of the refractive index of the first high refractive index layer 33 may be 1.75 or less. The refractive index of the first high refractive index layer 33 can be measured by the same method as the refractive index of the first hard coat layer 31. The difference in refractive index between the first hard coat layer 31 and the first high refractive index layer 34 may be 0.05 or more and 0.25 or less.

  The film thickness of the first high refractive index layer 33 is preferably 200 nm or less. The lower limit of the film thickness of the first high refractive index layer 33 is preferably 10 nm or more, and more preferably 30 nm or more. The upper limit of the film thickness of the first high refractive index layer 33 is preferably 170 nm or less, and more preferably 160 nm or less. The film thickness of the high refractive index layer can be determined by observing the cross section of the high refractive index layer with a transmission electron microscope (TEM, STEM) (magnification is preferably 10,000 times or more). Specifically, using the image of the transmission electron microscope, the film thickness of the three high refractive index layers in one image is measured, this is performed for five images, and the average value of the measured film thickness is calculated. .

  The first high refractive index layer 33 is not particularly limited as long as it has a refractive index higher than that of the first hard coat layer 31, but the first high refractive index layer 33 is, for example, a high refractive index layer 33. It can be composed of refractive index fine particles and a binder resin.

Examples of the high refractive index fine particles constituting the first high refractive index layer 33 include metal oxide fine particles. Specific examples of the metal oxide fine particles include titanium oxide (TiO ₂ , refractive index: 2.3 to 2.7), niobium oxide (Nb ₂ O ₅ , refractive index: 2.33), and zirconium oxide. (ZrO ₂ , refractive index: 2.10), antimony oxide (Sb ₂ O ₅ , refractive index: 2.04), tin oxide (SnO ₂ , refractive index: 2.00), tin-doped indium oxide (ITO, refractive index) : 1.95 to 2.00), cerium oxide (CeO _2, refractive index: 1.95), aluminum-doped zinc oxide (AZO, refractive index: 1.90 to 2.00), gallium-doped zinc oxide (GZO, Refractive index: 1.90 to 2.00), zinc antimonate (ZnSb ₂ O ₆ , refractive index: 1.90 to 2.00), zinc oxide (ZnO, refractive index: 1.90), yttrium oxide (Y ₂ O _3, the refractive index: 1 87), antimony-doped tin oxide (ATO, refractive index: 1.75 to 1.85), phosphorus-doped tin oxide (PTO, refractive index: 1.75 to 1.85), and the like. Among these, zirconium oxide is preferable from the viewpoint of refractive index.

  The binder resin constituting the first high refractive index layer 33 is not particularly limited, and a thermoplastic resin can also be used. From the viewpoint of increasing the surface hardness, a thermosetting resin or a photopolymerizable compound is used. Of these, a polymer (cross-linked product) is preferable, and a photopolymerizable compound is more preferable.

  Examples of the thermosetting resin include resins such as acrylic resin, urethane resin, phenol resin, urea melamine resin, epoxy resin, unsaturated polyester resin, and silicone resin. When curing the thermosetting resin, a curing agent may be used.

  Although it does not specifically limit as a photopolymerizable compound, A photopolymerizable monomer, an oligomer, and a polymer can be used. Examples of the monofunctional photopolymerizable monomer include ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, and N-vinylpyrrolidone. Examples of the bifunctional or higher photopolymerizable monomer include polymethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, and pentaerythritol tris. (Meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) Examples include acrylates, compounds obtained by modifying these compounds with ethylene oxide, polyethylene oxide, and the like.

  In addition, these compounds may have a refractive index adjusted to be high by introducing an aromatic ring, a halogen atom other than fluorine, sulfur, nitrogen, phosphorus atoms, or the like. In addition to the above compounds, relatively low molecular weight polyester resins having unsaturated double bonds, polyether resins, acrylic resins, epoxy resins, urethane resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, etc. Can also be used. When polymerizing (crosslinking) the photopolymerizable compound, the polymerization initiator described in the column of the first hard coat layer may be used.

  The first high refractive index layer 33 can be formed, for example, by a method similar to the method for forming the first hard coat layer 31. Specifically, first, a first composition for a high refractive index layer containing at least high refractive index fine particles, a photopolymerizable compound, and a solvent is applied to the surface of the first hard coat layer 31. The first high refractive index layer composition preferably contains a leveling agent.

<solvent>
As the solvent used for the first composition for a high refractive index layer, the same solvents as those described for the first hard coat layer can be used.

<Leveling agent>
As the leveling agent, the same leveling agent as described in the first hard coat layer can be used.

  Next, the film-like first high refractive index layer composition is conveyed to a heated zone for drying, and the first high refractive index layer composition is dried by various known methods. Evaporate the solvent. Thereafter, the first composition for a high refractive index layer is irradiated with light such as ultraviolet rays to polymerize (crosslink) the photopolymerizable compound, thereby curing the first composition for a high refractive index layer. Thus, the first high refractive index layer 15 can be formed.

(First low refractive index layer)
The first low refractive index layer 34 is a layer having a refractive index lower than that of the first hard coat layer 31. Specifically, the refractive index of the first low refractive index layer 34 may be 1.20 or more and 1.50 or less. The upper limit of the refractive index of the first low refractive index layer 34 may be 1.49 or less and may be 1.32 or less. The refractive index of the first low refractive index layer 34 can be measured by the same method as the refractive index of the first hard coat layer 31. The refractive index difference between the first high refractive index layer 33 and the first low refractive index layer 34 may be 0.10 or more and 0.25 or less.

  The film thickness of the first low refractive index layer 34 is preferably 200 nm or less. The lower limit of the film thickness of the first low refractive index layer 34 is preferably 10 nm or more, and more preferably 15 nm or more. The upper limit of the film thickness of the first low refractive index layer 34 is preferably 100 nm or less, and more preferably 50 nm or less. The film thickness of the low refractive index layer can be determined by observing the cross section of the first low refractive index layer with a transmission electron microscope (TEM, STEM) (magnification is preferably 10,000 times or more). . Specifically, using the image of the transmission electron microscope, the film thickness of the low refractive index layer at three locations in one image is measured, and this is performed for five images, and the average value of the measured film thickness is calculated. .

  The first low refractive index layer 34 is not particularly limited as long as it has a refractive index lower than the refractive index of the first hard coat layer 31, but the first low refractive index layer 34 is, for example, It can be composed of a low refractive index fine particle and a binder resin, or a low refractive index resin.

  Examples of the low refractive index fine particles include solid or hollow fine particles made of silica or magnesium fluoride. Among these, hollow silica fine particles are preferable, and such hollow silica fine particles can be produced by, for example, a production method described in Examples of JP-A-2005-099778.

  Among the hollow fine particles, hollow silica fine particles having an average primary particle size of 65 nm or more and 85 nm or less are preferable. Since ordinary hollow silica fine particles have an average primary particle size of 60 nm or less, hollow silica fine particles having an average primary particle size of 65 nm or more and 85 nm or less have a larger average primary particle size than ordinary hollow silica fine particles. It can be said that. By using hollow silica fine particles having an average primary particle size of 65 nm or more and 85 nm or less, the reflection Y value of the first antireflection film 29 is reduced to 0.1% or less by addition of a small amount, compared to the case of using normal hollow silica fine particles. Can be made. Further, since the hollow silica fine particles having an average primary particle size of 65 nm or more and 85 nm or less in the low refractive index layer can be made small, the antifouling property is improved and the scratch resistance can be improved. The lower limit of the average primary particle size of the hollow silica fine particles may be 68 nm or more, or 70 nm or more. The upper limit of the average primary particle size of the hollow silica fine particles may be 82 nm or less, or 80 nm or less. The average primary particle size of the hollow silica fine particles can be obtained from an image of a cross-sectional electron microscope (preferably a transmission electron microscope such as TEM or STEM having a magnification of 50,000 times or more) using image processing software. it can. Further, by using an image of a cross-sectional electron microscope (preferably a transmission electron microscope such as TEM, STEM and the like having a magnification of 50,000 times or more) and taking the scale into consideration, the hollow silica fine particles are manually calculated by calculating the average value. The average primary particle size may be determined. In this case, ten hollow silica fine particles are selected from the larger hollow silica fine particles in one image, and this is performed for five images, and an average value is calculated from a total of 50 hollow silica fine particles. In addition, when the hollow silica fine particles exist alone, that is, before the hollow silica fine particles are incorporated into the low refractive index layer or the composition for the low refractive index layer, the average primary particle size of the hollow silica fine particles is determined by laser scattering. It can be measured by the method. The measurement result by the laser scattering method and the calculation result from the cross-sectional electron microscope image are almost equal.

  As the low refractive index fine particles, silica fine particles having a photopolymerizable functional group on the surface (reactive silica fine particles) are preferably used, and having a photopolymerizable functional group on the surface and an average primary particle size of 65 nm or more and 85 nm. The following hollow silica fine particles are particularly preferred. Such silica fine particles having a photopolymerizable functional group on the surface can be prepared by surface-treating the silica fine particles with a silane coupling agent or the like. As a method of treating the surface of the silica fine particles with a silane coupling agent, a dry method in which the silane coupling agent is sprayed on the silica fine particles, or a wet method in which the silica fine particles are dispersed in a solvent and then reacted by adding the silane coupling agent. Etc.

  Examples of the binder resin that constitutes the first low refractive index layer 34 include the same binder resin that constitutes the first high refractive index layer 33. However, a resin having a low refractive index such as a resin in which a fluorine atom is introduced or an organopolysiloxane may be mixed in the binder resin.

  Examples of the low refractive index resin include a resin into which a fluorine atom is introduced and a resin having a low refractive index such as organopolysiloxane.

  The first low refractive index layer 34 preferably contains an antifouling agent. This is for the following reason. In a display device with a touch panel, the first low refractive index layer is present inside the display device with a touch panel, so that an observer's finger or the like does not touch the first low refractive index layer. This is because the manufacturer's finger or the like is touched during the process, and there is a risk that dirt such as a fingerprint may adhere. In addition, a protective adhesive layer for protecting the first antireflection film may be attached to the surface of the first low refractive index layer, and this protective adhesive layer is peeled off during the manufacturing process of the display panel. This is because if the antifouling property of the first low refractive index layer is low, the residue of the protective adhesive layer may remain on the surface of the first low refractive index layer.

<Anti-fouling agent>
As the antifouling agent, a polymerizable fluorine-containing compound having a photopolymerizable functional group and a fluorine atom is preferable. In the state of the first low refractive index layer, this fluorine-containing compound exists in a state of being polymerized with the binder resin by the photopolymerizable functional group.

  Among the polymerizable fluorine-containing compounds, polymerizable fluorine-containing compounds having a weight average molecular weight of 2,000 to 10,000 are preferable. By using a polymerizable fluorine-containing compound having a weight average molecular weight of 2,000 to 10,000, the lift-up effect described later can be reliably obtained.

  Commercially available products of polymerizable fluorine-containing compounds include, for example, OPTOOL DAC manufactured by Daikin, LINC-3A-MI20 (triacryloylheptadecafluorononenyl pentaerythritol) and LINC-102A (1,2- LINC series such as diacryloxymethylperfluorocyclohexane), Fluorolink series manufactured by Solvay Solexis, RS71 manufactured by DIC, and the like.

  When hollow fine particles are used as the low refractive index fine particles, the blending ratio (by weight) of the total amount of the hollow fine particles and the photopolymerizable compound constituting the binder resin and the polymerizable fluorine-containing compound as an antifouling agent is 95. : It is preferable that it is 5-85: 15. This range is preferred because if the proportion of the polymerizable fluorine-containing compound is less than the above range, sufficient antifouling property may not be obtained, and the proportion of the polymerizable fluorine-containing compound is within the above range. It is because there exists a possibility of causing a reduction | decrease in abrasion resistance and a coating nonuniformity when more than this ratio.

  The first low refractive index layer 34 preferably contains a slip agent in order to improve the scratch resistance of the first low refractive index layer 34.

<Slip agent>
As the slip agent, a polymerizable silicon-containing compound having a photopolymerizable functional group and a silicon atom is preferable. In the state of the first low refractive index layer, the silicon-containing compound exists in a state of being polymerized with the binder resin by the photopolymerizable functional group. Examples of commercially available slip agents include X22-164E manufactured by Shin-Etsu Chemical Co., Ltd.

  When hollow fine particles are used as the low refractive index fine particles, the blending ratio (by weight) of the total amount of the hollow fine particles and the photopolymerizable compound constituting the binder resin and the polymerizable silicon-containing compound as the slip agent is 95: It is preferably 5 to 85:15. This range is preferred because if the proportion of the polymerizable silicon-containing compound is less than the proportion of the above range, sufficient slipperiness may not be obtained, and the scratch resistance may be lowered. It is because there exists a possibility of causing a coating nonuniformity when there are more ratios of a compound than the ratio of the said range.

  The first low refractive index layer 34 can be formed by, for example, a method similar to the method for forming the first hard coat layer 31. Specifically, first, the first low refractive index layer composition containing at least the low refractive index fine particles, the photopolymerizable compound, and the solvent is applied to the surface of the first high refractive index layer 33.

<solvent>
As the solvent used for the first composition for a low refractive index layer, the same solvents as those described for the first hard coat layer can be used.

  Next, the film-like first low refractive index layer composition is transported to a heated zone for drying, and the first low refractive index layer composition is dried by various known methods. Evaporate. Thereafter, the first high refractive index layer composition is irradiated with light such as ultraviolet rays to polymerize (crosslink) the photopolymerizable compound, thereby curing the first low refractive index layer composition. Thus, the first low refractive index layer 34 can be formed.

  The first hard coat layer 31 and / or the first high refractive index layer 33 contains a non-polymerizable fluorine-containing compound, and the first low refractive index layer composition contains the polymerizable fluorine as an antifouling agent. When the compound is contained, the antifouling property can be remarkably improved. The reason for this is not clear, but is presumed as follows. In a state where the non-polymerizable fluorine-containing compound is present in the first hard coat layer 31 and / or the first high refractive index layer 33, the coating film of the first low refractive index layer composition is applied to the first high coat layer 31. When formed on the refractive index layer 33, the non-polymerizable fluorine-containing compound in the first hard coat layer 31 and / or the first high refractive index layer 34 is formed by the solvent of the first low refractive index layer composition. It elutes and enters the coating film of the first composition for low refractive index layer. And by the non-polymerizable fluorine-containing compound in the coating film of the first composition for low refractive index layer, the polymerizable fluorine-containing compound in this coating film reaches the vicinity of the surface of the coating film of the composition for low refractive index layer. Pushed up (lift-up effect). Thereby, since a polymerizable fluorine-containing compound comes to exist in the surface vicinity of this coating film, antifouling property can be improved significantly. Although adding a large amount of polymerizable fluorine-containing compound to the first low refractive index layer composition is considered, adding a large amount of polymerizable fluorine-containing compound to the first low refractive index layer composition, Since there is a possibility that a cloudiness may occur in the first low refractive index layer, such a method cannot be adopted. Further, when a non-polymerizable fluorine-containing compound is added to the first low refractive index layer composition in addition to the polymerizable fluorine-containing compound, the non-polymerizable fluorine-containing compound is deposited on the surface of the first low refractive index layer. As a result, the antifouling property is lowered, so that such a method cannot be adopted.

[Touch panel]
The touch panel 40 includes a sensor unit 50, a second antireflection film 60 disposed closer to the display panel 20 than the sensor unit 50, a cover glass 70 disposed on the viewer side from the sensor unit 50, and the sensor unit 50. And a transparent adhesive layer 41 for fixing the second antireflection film 60, and a transparent adhesive layer 42 for fixing the sensor unit 50 and the cover glass 70. The touch panel 40 only needs to include the sensor unit 50 and the second antireflection film 60, and may not include the cover glass 70 and the transparent adhesive layers 41 and 42.

≪Sensor part≫
The sensor unit 50 is a part that functions as a sensor of the touch panel 40. Although it does not specifically limit as the sensor part 50, For example, the sensor used for a projection capacitive system is mentioned. 3 includes a base film 51 provided with a patterned conductive layer 52 and a base film 51 provided with a patterned conductive layer 53 via a transparent adhesive layer 54. It has a laminated structure.

<Base film>
A base film 51 shown in FIG. 3 includes a transparent base 55, a hard coat layer 56 provided on one surface of the transparent base 55, and a high refractive index layer 57 provided on the hard coat layer 56. And a low refractive index layer 58 provided on the high refractive index layer 57 and a hard coat layer 59 laminated on the other surface of the transparent substrate 55.

  Instead of the substrate film 51, on the transparent substrate, the hard coat layer provided on one surface of the transparent substrate, the high refractive index layer provided on the hard coat layer, and the high refractive index layer The low refractive index layer provided, the hard coat layer provided on the other surface of the transparent substrate, the high refractive index layer provided on the hard coat layer, and the high refractive index layer were laminated. You may use the base film provided with the low-refractive-index layer. In this case, patterned conductive layers are provided on the low refractive index layers present on both sides of the base film.

  As the transparent base material 55, the hard coat layer 56, the high refractive index layer 57, and the low refractive index layer 58, a transparent base material, a hard coat layer, a high refractive index layer, and a low refractive index that are used in a normal touch panel sensor. Since a rate layer can be used, the description is omitted here.

<Conductive layer>
The shape of the conductive layers 52 and 53 is not particularly limited, and examples thereof include a square shape and a stripe shape. The conductive layers 52 and 53 are connected to a terminal portion (not shown) through an extraction pattern (not shown). Although the conductive layers 52 and 53 have shown the example comprised from the transparent conductive material, a conductive layer can be comprised from a mesh-shaped conducting wire. Transparent conductive materials include tin-doped indium oxide (ITO), antimony-doped tin oxide (ATO), zinc oxide, indium oxide (In ₂ O ₃ ), aluminum-doped zinc oxide (AZO), gallium-doped zinc oxide (GZO), oxidation Examples thereof include metal oxides such as tin, zinc oxide-tin oxide, indium oxide-tin oxide, and zinc oxide-indium oxide-magnesium oxide. Examples of the conductive wire material include light-shielding metal materials such as silver, copper, aluminum, and alloys thereof.

  The film thicknesses of the conductive layers 52 and 53 are appropriately set according to the electrical resistance specifications, but are preferably 10 nm or more and 50 nm or less, for example.

  The formation method of the conductive layers 52 and 53 is not particularly limited, and a sputtering method, a vacuum evaporation method, an ion plating method, a CVD method, a coating method, a printing method, or the like can be used. Examples of the method for patterning the conductive layer include a photolithography method.

  When the conductive layer is composed of a mesh-like conductor, the width of the conductor is preferably 1 μm or more and 20 μm or less, and more preferably 2 μm or more and 15 μm or less. As a result, the influence of the conducting wire on the image visually recognized by the observer can be reduced to a negligible level.

  When the conductive layer is composed of a mesh-like conductor, the conductive layer has, for example, a rectangular opening formed by the conductor. The aperture ratio of the conductive layer is appropriately set according to the characteristics of the image light emitted from the display device, and is in the range of 80% to 90%, for example. Further, the arrangement pitch of the openings is appropriately set within a range of 100 μm or more and 1000 μm or less in accordance with the required aperture ratio and the value of the conductor width.

≪Second antireflection film≫
The second antireflection film 60 is separated from the first antireflection film 29. The distance d between the surface 29A of the first antireflection film 29 and the surface 60A of the second antireflection film 60 shown in FIG. 4 is 50 μm or more and 1000 μm or less from the viewpoint of thinning the display device with a touch panel. It is preferable. The distance d is a distance in a state where the observer's finger or the like is not touching the image display surface 10A.

  The second antireflection film 60 has a structure in which a second transparent substrate 61, a second hard coat layer 62, and a second antireflection layer 63 are laminated in this order toward the display panel 20 side. have. A surface 60A of the second antireflection film 60 forms a surface 40A of the touch panel 40 on the display panel 20 side.

  The reflection Y value measured from the second antireflection layer 63 side in the second antireflection film 60 is less than 0.3%. The reflection Y value is preferably 0.15% or less, and more preferably 0.1% or less, from the viewpoint of making the interference fringes more invisible. The reflection Y value in the second antireflection film 60 can be measured by the same method as in the first antireflection film 29.

  The second antireflection film 60 having a reflection Y value of less than 0.3% mainly includes the refractive index and film thickness of the second low refractive index layer 64 and / or the refraction of the second high refractive index layer 63. It can be obtained by adjusting the rate and the film thickness. The ten-point average roughness (Rzjis) of the surface 60A of the second antireflection film 60 is preferably 10 nm or more and 100 nm or less because of the above-mentioned problem of cloudiness.

<Second transparent substrate>
Since the second transparent substrate 61 is the same as the first transparent substrate 30, the description thereof will be omitted here. However, the second transparent substrate 61 is not necessarily the same material as that of the first transparent substrate 30. For example, the first transparent base material 30 is preferably an acrylic base material in order to suppress elution of iodine in the polarizing element 28, but the polarizing element is not provided on the touch panel 40. It is desirable that the light transmittance is higher than the low water permeability. For this reason, as the 2nd transparent base material 61, the cellulose acylate base material which was excellent in the light transmittance rather than the acrylic base material, especially a triacetyl cellulose base material are preferable.

<Second hard coat layer>
Since the second hard coat layer 62 is the same as the first hard coat layer 31, the description thereof is omitted here. However, the composition of the second hard coat layer 62 may be different from the composition of the first hard coat layer 31.

<Second antireflection layer>
The configuration and composition of the second antireflection layer 63 are not particularly limited as long as the reflection Y value of the second antireflection film 60 is less than 0.3%. For example, the second antireflection layer 63 may be composed of a second high refractive index layer 64 and a second low refractive index layer 65 provided on the second high refractive index layer 64. However, the present invention is not limited to this, and the second low refractive index layer 65 may be used alone.

(Second high refractive index layer)
Since the second high refractive index layer 64 is the same as the first high refractive index layer 33, the description thereof is omitted here. However, the composition of the second high refractive index layer 64 may be different from the composition of the first high refractive index layer 33.

(Second low refractive index layer)
Since the second low refractive index layer 65 is the same as the first low refractive index layer 34, the description thereof is omitted here. However, the composition of the second low refractive index layer 65 may be different from the composition of the first low refractive index layer 34.

  According to this embodiment, since the reflection Y value measured from the surface 60A side (second antireflection layer 63) side of the second antireflection film 60 is less than 0.3%, from the observer side. Light incident on the second antireflection film 60 and reflected by the surface 60A of the second antireflection film 60 can be reduced. Further, since the reflection Y value measured from the surface 29A side (first antireflection layer 32 side) of the first antireflection film 29 is less than 0.3%, the second antireflection film 60 is transmitted. Thus, the light reflected by the surface 29A of the first antireflection film 29 can be reduced. Thereby, even if an interference fringe occurs due to the image display surface 10A being strongly pressed by a finger or the like and the distance between the display panel 20 and the touch panel 40 being narrowed, the interference fringe becomes inconspicuous. Is made invisible.

  In order to describe the present invention in detail, examples will be described below, but the present invention is not limited to these descriptions. In addition, the following “100% solid content conversion value” is a value when the solid content in the solvent diluted product is 100%. The following “average primary particle size” is a value obtained when the fine particles themselves are measured by a laser scattering method.

<Preparation of composition for hard coat layer>
First, each component was mix | blended so that it might become a composition shown below, and the composition for transparent layers was obtained.
(Composition 1 for hard coat layer)
Dipentaerythritol hexaacrylate (product name “KAYARAD DPHA”, manufactured by Nippon Kayaku Co., Ltd.): 100 parts by mass • Polymerization initiator (product name “Irgacure 184”, manufactured by BASF Japan): 4 parts by mass • Leveling agent (product) Name “F568” (manufactured by DIC): 0.1 part by mass (100% solid content conversion value)
・ Methyl isobutyl ketone (MIBK): 120 parts by mass

(Composition 2 for hard coat layer)
Pentaerythritol tetraacrylate (product name “Beamset 710”, manufactured by Arakawa Chemical Industries): 100 parts by mass • Styrene-acrylic copolymer fine particles (average primary particle size 2 μm): 3 parts by mass • Silica fine particles (average primary particles) Diameter 12 nm): 1 part by mass / polymerization initiator (product name “Irgacure 184”, manufactured by BASF Japan): 4 parts by mass / leveling agent (product name “F568”, manufactured by DIC): 0.1 part by mass (solid) (100% conversion value)
・ Methyl isobutyl ketone (MIBK): 120 parts by mass

(Composition 3 for hard coat layer)
Pentaerythritol triacrylate (product name “KAYARAD PET-30”, manufactured by Nippon Kayaku Co., Ltd.): 100 parts by mass Silica fine particles (average primary particle size 3.5 μm): 7 parts by mass Polymerization initiator (product name “Irgacure 184 ", manufactured by BASF Japan): 4 parts by mass-leveling agent (product name" F568 ", manufactured by DIC): 0.1 parts by mass (converted to a solid content of 100%)
・ Methyl isobutyl ketone (MIBK): 120 parts by mass

<Preparation of composition for high refractive index layer>
Each component was mix | blended so that it might become a composition shown below, and the composition for high refractive index layers was obtained.
(Composition 1 for high refractive index layer)
Antimony pentoxide fine particles (average primary particle size 20 nm): 400 parts by mass (converted to a solid content of 100%)
Dipentaerythritol hexaacrylate (product name “KAYARAD DPHA”, manufactured by Nippon Kayaku Co., Ltd.): 100 parts by mass • Polymerization initiator (product name “Irgacure 184”, manufactured by BASF Japan): 4 parts by mass • Leveling agent (product) Name “F568” (manufactured by DIC): 15 parts by mass (100% solid content conversion value)
・ Methyl isobutyl ketone (MIBK): 16000 parts by mass

(Composition 2 for high refractive index layer)
Antimony pentoxide fine particles (average primary particle size 20 nm): 400 parts by mass (converted to a solid content of 100%)
Dipentaerythritol hexaacrylate (product name “KAYARAD DPHA”, manufactured by Nippon Kayaku Co., Ltd.): 100 parts by mass • Polymerization initiator (product name “Irgacure 184”, manufactured by BASF Japan): 4 parts by mass • Leveling agent (product) Name “F568” (manufactured by DIC): 2.5 parts by mass (100% solid content conversion value)
・ Methyl isobutyl ketone (MIBK): 16000 parts by mass

<Preparation of composition for low refractive index layer>
Each component was mix | blended so that it might become the composition shown below, and the composition for low refractive index layers was obtained.
(Composition 1 for low refractive index layer)
・ Hollow silica fine particles (average primary particle size 75 nm): 150 parts by mass (100% solid content conversion value)
Pentaerythritol triacrylate (product name “KAYARAD PET-30”, manufactured by Nippon Kayaku Co., Ltd.): 20 parts by mass Fluorine-containing polymer (product name “OPSTAR JN35”, manufactured by JSR): 80 parts by mass (100% solid content) Conversion value)
・ Polymerization initiator (product name “Irgacure 127”, manufactured by BASF Japan): 4 parts by mass • Polymerizable fluorine-containing antifouling agent (product name “OPTOOL DAC”, manufactured by Daikin): 25 parts by mass (100% solid content) Conversion value)
Polymerizable silicon-containing slip agent (Product name “X22-164E”, manufactured by Shin-Etsu Chemical Co., Ltd.): 10 parts by mass Methyl isobutyl ketone (MIBK): 8000 parts by mass

(Composition 2 for low refractive index layer)
Hollow silica fine particles (average primary particle size 75 nm): 100 parts by mass (100% solid content conversion value)
Pentaerythritol triacrylate (product name “KAYARAD PET-30”, manufactured by Nippon Kayaku Co., Ltd.): 20 parts by mass Fluorine-containing polymer (product name “OPSTAR JN35”, manufactured by JSR): 80 parts by mass (100% solid content) Conversion value)
・ Polymerization initiator (product name “Irgacure 127”, manufactured by BASF Japan): 4 parts by mass • Polymerizable fluorine-containing antifouling agent (product name “OPTOOL DAC”, manufactured by Daikin): 20 parts by mass (100% solid content) Conversion value)
Polymerizable silicon-containing slip agent (product name “X22-164E”, manufactured by Shin-Etsu Chemical Co., Ltd.): 8 parts by mass Methyl isobutyl ketone (MIBK): 8000 parts by mass

(Composition 3 for low refractive index layer)
Hollow silica fine particles (average primary particle size 60 nm): 200 parts by mass (converted to 100% solid content)
Pentaerythritol triacrylate (product name “KAYARAD PET-30”, manufactured by Nippon Kayaku Co., Ltd.): 20 parts by mass Fluorine-containing polymer (product name “OPSTAR JN35”, manufactured by JSR): 80 parts by mass (100% solid content) Conversion value)
-Polymerization initiator (product name "Irgacure 127", manufactured by BASF Japan): 4 parts by mass-Polymerizable fluorine-containing antifouling agent (product name "OPTOOL DAC", manufactured by Daikin): 30 parts by mass (100% solid content) Conversion value)
Polymerizable silicon-containing slip agent (product name “X22-164E”, manufactured by Shin-Etsu Chemical Co., Ltd.): 12 parts by mass • Methyl isobutyl ketone (MIBK): 8000 parts by mass

(Composition 4 for low refractive index layer)
Hollow silica fine particles (average primary particle size 75 nm): 200 parts by mass (converted to 100% solid content)
Pentaerythritol triacrylate (product name “KAYARAD PET-30”, manufactured by Nippon Kayaku Co., Ltd.): 20 parts by mass Fluorine-containing polymer (product name “OPSTAR JN35”, manufactured by JSR): 80 parts by mass (100% solid content) Conversion value)
-Polymerization initiator (product name "Irgacure 127", manufactured by BASF Japan): 4 parts by mass-Polymerizable fluorine-containing antifouling agent (product name "OPTOOL DAC", manufactured by Daikin): 30 parts by mass (100% solid content) Conversion value)
Polymerizable silicon-containing slip agent (product name “X22-164E”, manufactured by Shin-Etsu Chemical Co., Ltd.): 12 parts by mass • Methyl isobutyl ketone (MIBK): 8000 parts by mass

(Composition 5 for low refractive index layer)
Hollow silica fine particles (average primary particle size 60 nm): 170 parts by mass (100% solid content conversion value)
Pentaerythritol triacrylate (product name “KAYARAD PET-30”, manufactured by Nippon Kayaku Co., Ltd.): 20 parts by mass Fluorine-containing polymer (product name “OPSTAR JN35”, manufactured by JSR): 80 parts by mass (100% solid content) Conversion value)
・ Polymerization initiator (product name “Irgacure 127”, manufactured by BASF Japan): 4 parts by mass • Polymerizable fluorine-containing antifouling agent (product name “OPTOOL DAC”, manufactured by Daikin): 27 parts by mass (100% solid content) Conversion value)
Polymerizable silicon-containing slip agent (product name “X22-164E”, manufactured by Shin-Etsu Chemical Co., Ltd.): 10.8 parts by mass • Methyl isobutyl ketone (MIBK): 8000 parts by mass

(Composition 6 for low refractive index layer)
Hollow silica fine particles (average primary particle size 60 nm): 81.8 parts by mass (converted to 100% solid content)
Pentaerythritol triacrylate (product name “KAYARAD PET-30”, manufactured by Nippon Kayaku Co., Ltd.): 100 parts by mass • Polymerization initiator (product name “Irgacure 127”, manufactured by BASF Japan): 4 parts by mass • polymerizable fluorine Containing antifouling agent (product name “OPTOOL DAC”, manufactured by Daikin): 18.2 parts by mass (100% solid content conversion value)
Polymerizable silicon-containing slip agent (product name “X22-164E”, manufactured by Shin-Etsu Chemical Co., Ltd.): 7.3 parts by mass Methyl isobutyl ketone (MIBK): 8000 parts by mass

(Composition 7 for low refractive index layer)
Hollow silica fine particles (average primary particle size 60 nm): 55 parts by mass (converted to 100% solid content)
Pentaerythritol triacrylate (product name “KAYARAD PET-30”, manufactured by Nippon Kayaku Co., Ltd.): 100 parts by mass • Polymerization initiator (product name “Irgacure 127”, manufactured by BASF Japan): 4 parts by mass • polymerizable fluorine Contained antifouling agent (product name “OPTOOL DAC”, manufactured by Daikin): 15.5 parts by mass (converted to a solid content of 100%)
Polymerizable silicon-containing slip agent (product name “X22-164E”, manufactured by Shin-Etsu Chemical Co., Ltd.): 6.2 parts by mass Methyl isobutyl ketone (MIBK): 8000 parts by mass

<Sample 1>
A triacetyl cellulose base material (product name “KC4UAW”, manufactured by Konica Minolta Co., Ltd.) having a thickness of 40 μm as a transparent base material was prepared, and the hard coat composition 1 was applied to one side of the triacetyl cellulose base material, A coating film was formed. Next, 70 ° C. dry air was passed through the formed coating film at a flow rate of 0.2 m / s for 15 seconds, and then 70 ° C. dry air was passed through for 30 seconds at a flow rate of 10 m / s. By evaporating the solvent in the coating film and irradiating the ultraviolet light with an integrated light amount of 100 mJ / cm ² under a nitrogen atmosphere (oxygen concentration of 200 ppm or less) to cure the coating film, the refractive index is increased. A hard coat layer having a thickness of 1.52 and a thickness of 8 μm was formed. Next, the composition 1 for a high refractive index layer was applied on the hard coat layer to form a coating film. And after drying the formed coating film for 1 minute at 40 degreeC, under a nitrogen atmosphere (oxygen concentration 200 ppm or less), it hardens | cures by irradiating with an ultraviolet-ray with the integrated light quantity of 100 mJ / cm < ² >, and refractive index is 1. .63 and a high refractive index layer having a thickness of 150 nm were formed. Subsequently, the composition 1 for low refractive index layers was apply | coated on the high refractive index layer, and the coating film was formed. And after drying the formed coating film for 1 minute at 40 degreeC, under a nitrogen atmosphere (oxygen concentration 200 ppm or less), it hardens | cures by irradiating with an ultraviolet-ray with the integrated light quantity of 100 mJ / cm < ² >, and refractive index is 1. A low refractive index layer having a thickness of .29 and a thickness of 100 nm was formed. This produced the antireflection film concerning sample 1.

<Sample 2>
In Sample 2, antireflection was performed in the same manner as Sample 1, except that the low refractive index layer composition 2 was used instead of the low refractive index layer composition 1 to form the low refractive index layer of the antireflection film. A film was prepared. The refractive index of the low refractive index layer of the antireflection film according to Sample 2 was 1.32.

<Sample 3>
In Sample 3, antireflection was performed in the same manner as Sample 1 except that the low refractive index layer composition 3 was used instead of the low refractive index layer composition 1 to form the low refractive index layer of the antireflection film. A film was prepared. The refractive index of the low refractive index layer of the antireflection film according to Sample 3 was 1.29.

<Sample 4>
In Sample 4, antireflection was performed in the same manner as Sample 1 except that the low refractive index layer composition 4 was used instead of the low refractive index layer composition 1 to form the low refractive index layer of the antireflection film. A film was prepared. The refractive index of the low refractive index layer of the antireflection film according to Sample 4 was 1.26.

<Sample 5>
In Sample 5, antireflection was conducted in the same manner as Sample 1 except that the low refractive index layer composition 5 was used instead of the low refractive index layer composition 1 to form the low refractive index layer of the antireflection film. A film was prepared. The refractive index of the low refractive index layer of the antireflection film according to Sample 5 was 1.32.

<Sample 6>
In Sample 6, the hard coat layer composition 2 was used in place of the hard coat layer composition 1 to form a hard coat layer of the antireflection film, and the thickness of the hard coat layer was 4 μm. An antireflection film was produced in the same manner as Sample 1. The refractive index of the hard coat layer of the antireflection film according to Sample 6 was 1.52.

<Sample 7>
In Sample 7, antireflection was performed in the same manner as Sample 1 except that the high refractive index layer composition 2 was used instead of the high refractive index layer composition 1 to form the high refractive index layer of the antireflective film. A film was prepared. The refractive index of the high refractive index layer of the antireflection film according to Sample 7 was 1.63.

<Sample 8>
In sample 8, antireflection was performed in the same manner as in sample 1, except that the low refractive index layer composition 6 was used instead of the low refractive index layer composition 1 to form the low refractive index layer of the antireflection film. A film was prepared. The refractive index of the low refractive index layer of the antireflection film according to Sample 8 was 1.37.

<Sample 9>
In sample 9, the hard coat layer composition 2 was used instead of the hard coat layer composition 1 to form a hard coat layer of an antireflection film, and the low refractive index layer composition 1 was replaced with a low refractive index. An antireflection film was produced in the same manner as in Sample 1, except that the low refractive index layer of the antireflection film was formed using the layer composition 7 and the high refractive index layer was not formed. The refractive index of the hard coat layer of the antireflection film according to Sample 9 was 1.52, and the refractive index of the low refractive index layer was 1.42.

<Sample 10>
In Sample 10, a hard coat layer composition 3 was used in place of hard coat layer composition 1, and a hard coat layer having a thickness of 4 μm was formed in the same manner as in sample 1, and an antiglare film was formed. Produced. In addition, the anti-glare film of Sample 10 was one in which the low refractive index layer and the low refractive index layer were not formed on the hard coat layer. The refractive index of the hard coat layer of the antiglare film according to Sample 10 was 1.51.

<Sample 11>
In sample 11, a hard coat layer was formed using composition 1 for hard coat layer in the same manner as in sample 1 to produce a hard coat film. In addition, the hard coat film of Sample 11 was one in which the low refractive index layer and the low refractive index layer were not formed on the hard coat layer.

<Measurement of reflection Y value>
About the antireflection film of samples 1-9, the anti-glare film of sample 10, and the hard coat film of sample 11, the reflection Y value was measured using the spectrophotometer (MPC3100, Shimadzu Corporation make). Specifically, the surface side of each film (the surface side of the low refractive index layer in the antireflection films of Samples 1 to 9, the surface of the hard coat layer in the antiglare film of Sample 10 and the hard coat film of Sample 11) Irradiate light with an incident angle of 5 degrees from the side), receive the reflected light in the specular direction reflected by each film, measure the reflectance in the wavelength range of 380 nm to 780 nm, and then the human eye The reflection Y value was calculated by software (for example, software built in the MPC 3100) that converts the brightness to feel. The reflection Y value was measured in a state where a black tape (manufactured by Teraoka Seisakusho) was attached to the surface (back surface) opposite to the surface on which the hard coat layer was formed in the triacetyl cellulose base material.

<Measurement of ten-point average roughness (Rzjis)>
The surface of the antireflection film of Samples 1 to 9 (surface of the low refractive index layer), the surface of the antiglare film of Sample 10 (surface of the hard coat layer), and the surface of the hard coat film of Sample 11 (surface of the hard coat layer) ), Ten-point average roughness (Rzjis) was measured. Specifically, Rzjis was measured under the following measurement conditions using a surface roughness measuring instrument (model number: SE-3400 / manufactured by Kosaka Laboratory Ltd.).
1) Stylus of surface roughness detector (trade name SE2555N (2 μ standard) manufactured by Kosaka Laboratory Ltd.)
・ Tip radius of curvature 2μm, apex angle 90 degrees, material diamond 2) Measurement conditions of surface roughness measuring instrument ・ Reference length (cutoff value λc of roughness curve): 2.5 mm
Evaluation length (reference length (cutoff value λc) × 5): 12.5 mm
・ Feeding speed of stylus: 0.5mm / s
・ Preliminary length: (cutoff value λc) × 2
・ Vertical magnification: 2000 times ・ Horizontal magnification: 10 times

<Anti-fouling evaluation>
Antifouling property evaluation for fingerprints The surface of the antireflection film of Samples 1 to 9 (surface of the low refractive index layer), the surface of the antiglare film of Sample 10 (surface of the hard coat layer), and the surface of the hard coat film of Sample 11 After each fingerprint was attached to (the surface of the hard coat layer), it was wiped with Bencot M-3 manufactured by Asahi Kasei Co., Ltd., and the ease of wiping was visually confirmed. The evaluation criteria were as follows.
○: The fingerprint was easily or relatively easily wiped off.
Δ: The fingerprint could be wiped off, but it was not easy.
X: The fingerprint could not be wiped off.

<Abrasion resistance evaluation>
The surface of the antireflection film of Samples 1 to 9 (surface of the low refractive index layer), the surface of the antiglare film of Sample 10 (surface of the hard coat layer), and the surface of the hard coat film of Sample 11 (surface of the hard coat layer) ) Using steel wool # 0000 (product name “Bonstar”, manufactured by Nippon Steel Wool Co., Ltd.), while applying a load of 150 g / cm ² and rubbing 10 times at a speed of 100 mm / second, each triacetyl cellulose group A black tape was applied to the surface of the material opposite to the surface on which the hard coat layer was formed, and the presence or absence of scratches was evaluated by visual observation under a three-wavelength fluorescent lamp. The evaluation criteria were as follows.
○: There was no scratch.
Δ: There were several scratches.
X: There were many scratches.

The results are shown in Table 1.

<Examples 1 to 10 and Comparative Examples 1 to 7>
Two films were taken out from the films according to Samples 1 to 11, and one was a first film and the other was a second film. The film combinations in each example and comparative example are shown in Table 2. The two films to be taken out may be the same sample. Then, using the first film and the second film, the following interference fringe evaluation, white turbidity evaluation, and sticking prevention evaluation were performed.

<Interference fringe evaluation>
First, the 1st film and the 2nd film were affixed on the glass plate of thickness 0.8mm respectively through the transparent adhesive (product name "PD-S1", the Panac company make). Then, the surface of the first film (the surface of the low refractive index layer in samples 1 to 9, the surface of the hard coat layer in samples 10 and 11) and the surface of the second film (low refraction in samples 1 to 9). The glass plate with the second film was placed on the glass plate with the first film so that the surface of the rate layer, the surface of the hard coat layer in the samples 10 and 11, was in contact. Whether or not interference fringes are confirmed by irradiating light from a sodium lamp placed on the glass with the second film with a load of 2000 g / cm ² applied from the glass side with the second film. Examined. The evaluation criteria were as follows.
○: No interference fringes were confirmed, or some interference fringes were observed, but there was no problem.
X: Interference fringes were clearly confirmed.

<Evaluation of cloudiness>
First, the 1st film and the 2nd film were affixed on the glass plate of thickness 0.8mm respectively through the transparent adhesive (product name "PD-S1", the Panac company make). And the glass plate with a 2nd film was arrange | positioned on the glass plate with a 1st film so that the surface of a 1st film and the surface of a 2nd film might contact. In this state, in a dark room, light was applied to the glass with the second film from a table lamp (three-wavelength fluorescent lamp tube), and it was examined whether or not a cloudiness was confirmed. The evaluation criteria were as follows.
○: No cloudiness was observed.
Δ: Slight cloudiness was observed, but at a level with no practical problem.
X: The cloudiness was clearly observed.

<Anti-sticking property>
First, the 1st film and the 2nd film were affixed on the glass plate of thickness 0.8mm respectively via the transparent adhesive (product name "PD-S1", the Panac company make). And the glass plate with a 2nd film was piled up on the glass plate with a 1st film so that the surface of a 1st film and the surface of a 2nd film might contact | connect. In that state, a load of 2000 g / cm ² is applied from the surface opposite to the surface on the second film side in the glass plate with the second film, and then the load is removed. The board was slid with respect to the glass plate with a 1st film, and the sticking property of the 1st film and the 2nd film was investigated. The evaluation criteria were as follows.
◯: The second film-attached glass plate moved smoothly with respect to the first film-attached glass plate, or moved slightly but caught.
X: The glass plate with a 2nd film did not move with respect to the glass plate with a 1st film.

The results are shown in Table 2 below.

  As shown in Table 1 and Table 2, in Comparative Examples 1 to 7, a film having a reflection Y value of 0.3% or more was used for at least one of the first film and the second film. Interference fringes were clearly confirmed. On the other hand, in Examples 1 to 10, since the antireflection film having a reflection Y value of less than 0.3% was used as the first film and the second film, no interference fringes were confirmed. Although some interference fringes were confirmed, the level was satisfactory.

DESCRIPTION OF SYMBOLS 10 ... Display apparatus 10A with a touch panel ... Image display surface 20 ... Display panel 20A ... Surface 25 ... Display element 29 ... 1st antireflection film 29A ... Surface 30 ... 1st transparent base material 31 ... 1st hard-coat layer 32 ... 1st antireflection layer 33 ... 1st high refractive index layer 34 ... 1st low refractive index layer 40 ... Touch panel 40A ... Surface 50 ... Sensor part 60 ... 2nd antireflection film 60A ... Surface 61 ... 2nd Transparent substrate 62 ... second hard coat layer 63 ... second antireflection layer 64 ... second high refractive index layer 65 ... second low refractive index layer

Claims (6)

A display device with a touch panel, comprising: a display panel for displaying an image; and a touch panel arranged closer to an observer than the display panel,
The display panel is a display element, and a first antireflection film disposed closer to the viewer than the display device, the first transparent substrate and the first hardware facing the viewer The coating layer and the first antireflection layer are laminated in this order, and the first antireflection film includes a first antireflection film in which the surface of the first antireflection film forms the surface on the viewer side of the display panel,
The touch panel is a sensor unit and the second antireflection film that is disposed closer to the display panel than the sensor unit and is spaced from the first antireflection film, toward the display panel side The second transparent base material, the second hard coat layer, and the second antireflection layer are laminated in this order, and the surface of the second antireflection film is the surface on the display panel side of the touch panel. A second antireflective film comprising
The display device with a touch panel, wherein the reflection Y value measured from the surface side of the first antireflection film and the reflection Y value measured from the surface side of the second antireflection film are each less than 0.3%.   The display device with a touch panel according to claim 1, wherein a ten-point average roughness (Rzjis) on each of the surface of the first antireflection film and the surface of the second antireflection film is 10 nm or more and 100 nm or less.   The ten-point average roughness (Rzjis) on the surface of the first antireflection film is more than 100 nm and not more than 500 nm, and the ten-point average roughness on the surface of the second antireflection film is 10 nm or more and 100 nm. The display device with a touch panel according to claim 1, which is the following.   The display with a touch panel according to any one of claims 1 to 3, wherein a distance between the surface of the first antireflection film and the surface of the second antireflection film is 50 µm or more and 1000 µm or less. apparatus.   The first antireflection layer includes a first low refractive index layer having a refractive index lower than that of the first hard coat layer, and the first low refractive index layer has an average primary particle size of 65 nm to 85 nm. The display device with a touch panel according to any one of claims 1 to 4, comprising the hollow silica fine particles and a binder resin.   The second antireflection layer includes a second low refractive index layer having a refractive index lower than that of the second hard coat layer, and the second low refractive index layer has an average primary particle size of 65 nm to 85 nm. The display device with a touch panel according to claim 1, comprising the hollow silica fine particles and a binder resin.

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