Anti-dazzle film
阅读说明:本技术 防眩膜 (Anti-dazzle film ) 是由 林正树 菅原庆峰 于 2018-06-25 设计创作,主要内容包括:本发明涉及一种防眩膜,其具备雾度值为50%以上且99%以下范围的值的防眩层,在将所述防眩膜安装于显示器的表面的状态下,显示器的亮度分布的标准偏差为0以上且6以下范围的值,并且,光梳宽度0.5mm的透射图像清晰度为0%以上且60%以下范围的值。(The present invention relates to an antiglare film comprising an antiglare layer having a haze value in the range of 50% to 99%, wherein the standard deviation of the luminance distribution of a display is in the range of 0% to 6% in a state where the antiglare film is attached to the surface of the display, and the transmission image clarity with a comb width of 0.5mm is in the range of 0% to 60%.)
1. An anti-glare film comprising an anti-glare layer having a haze value in the range of 50% to 99%,
in a state where the antiglare film is attached to a surface of a display, a standard deviation of a luminance distribution of the display is a value in a range of 0 or more and 6 or less, and a transmission image clarity of an optical comb width of 0.5mm is a value in a range of 0% or more and 60% or less.
2. The antiglare film of claim 1,
the antiglare layer contains a plurality of resin components and has a co-continuous phase structure formed due to phase separation of the plurality of resin components.
3. The antiglare film of claim 2, wherein the antiglare layer comprises:
acrylic acid copolymer,
Cellulose acetate propionate, and
at least one of an acrylic ultraviolet-curable compound containing nano silica and a urethane acrylate.
4. The antiglare film of claim 1,
the antiglare layer comprises a matrix resin, a plurality of microparticles dispersed in the matrix resin,
the difference in refractive index between the fine particles and the matrix resin is a value in the range of 0 to 0.07.
5. The antiglare film of claim 4,
the ratio G2/G1 of the weight G1 of the matrix resin of the antiglare layer to the total weight G2 of the plurality of fine particles contained in the antiglare layer is a value in the range of 0.07 or more and 0.20 or less.
Technical Field
The present invention relates to an antiglare film for preventing reflection of external light to a display surface.
Background
The antiglare film is a film having an antiglare layer with irregularities formed on the surface thereof by surface roughening, for example, and is attached to the surface of a display to scatter external light and prevent reflection of the external light to the display surface.
Examples of a method for forming the unevenness on the surface of the antiglare layer include: a method of dispersing fine particles (filler) in an antiglare layer as disclosed in
Disclosure of Invention
Problems to be solved by the invention
When an antiglare film is attached to the surface of a display, although reflection of external light to the display surface can be prevented, on the other hand, light from the display is affected by the antiglare film, and display performance of the display via the antiglare film may be degraded. Therefore, the antiglare film is desired to have a high degree of freedom in designing the transmission image clarity.
Further, if an antiglare film is attached to the surface of a display or the like having high-definition pixels, the light from the display transmitted through the antiglare film is refracted by the surface irregularities of the antiglare layer or the pixels of the display are observed in an enlarged manner due to a lens effect caused by the surface irregularities of the antiglare layer, and this may cause glare on the display or make it difficult to observe an image.
As a method for suppressing glare of the display, for example, it is conceivable to reduce surface irregularities of the antiglare layer, but there is a concern that the antiglare property of the antiglare film may be reduced. Further, there is a problem that it is difficult to quantitatively evaluate the glare of the display, and it may be difficult to develop an antiglare film capable of effectively suppressing the glare of the display according to an objective index.
Accordingly, an object of the present invention is to provide an antiglare film having a good antiglare property, capable of suppressing the glare of a display, and having a high degree of freedom in design of transmission image clarity by quantitatively evaluating the glare of the display and designing.
Means for solving the problems
In order to solve the above problems, one embodiment of the present invention includes an antiglare layer having a haze value in a range of 50% to 99%, a standard deviation of a luminance distribution of a display in a state of being attached to a surface of the display is a value in a range of 0% to 6%, and a transmission image clarity of a comb width of 0.5mm is a value in a range of 0% to 60%.
Here, the value representing the standard deviation of the luminance distribution of the display indicates the degree of irregularity of the bright spots on the display, and serves as an objective index that can quantitatively evaluate the sharpness of the display. Therefore, in the above configuration, the antiglare layer is configured by setting the standard deviation to a value in the range of 0 to 6, and the glare of the display can be quantitatively evaluated to design the antiglare film. Therefore, an antiglare film which can effectively suppress glare of a display can be stably obtained, compared to, for example, a case where a tester subjectively evaluates glare by visual observation.
Further, by setting the haze value of the antiglare layer to a value in the range of 50% or more and 99% or less while setting the standard deviation to a given value, it is possible to obtain good antiglare properties while suppressing glare of the display. Further, by setting the transmission image clarity of the antiglare film with an optical comb width of 0.5mm to a value in the range of 0% or more and 60% or less, it is possible to widely secure the degree of freedom in designing the transmission image clarity of the antiglare film.
The antiglare layer may include a plurality of resin components and have a co-continuous phase structure formed by phase separation of the plurality of resin components. By using such a co-continuous phase structure, it is possible to easily obtain a good antiglare property while suppressing glare of the display.
The antiglare layer may contain at least one of an acrylic ultraviolet-curable compound containing nano silica and urethane acrylate, an acrylic copolymer, and cellulose acetate propionate. Thus, an antiglare film having antiglare properties and capable of suppressing glare of a display can be easily produced.
The antiglare layer may include a matrix resin, and a plurality of fine particles dispersed in the matrix resin, and a difference in refractive index between the fine particles and the matrix resin may be a value in a range of 0 or more and 0.07 or less.
Thus, the antiglare layer can be formed using the matrix resin and the plurality of fine particles, and an antiglare film having antiglare properties and capable of suppressing glare of a display can be easily manufactured.
A ratio G2/G1 of a weight G1 of the matrix resin of the antiglare layer to a total weight G2 of the plurality of fine particles contained in the antiglare layer may be a value in a range of 0.07 or more and 0.20 or less. Thus, the antiglare film having an antiglare layer having a structure in which a plurality of fine particles are dispersed in a matrix resin can be favorably produced.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to design by quantitatively evaluating the glare of a display, thereby providing an antiglare film having good antiglare properties and capable of suppressing the glare of the display while having a high degree of freedom in design of transmission image clarity.
Drawings
Fig. 1 is a sectional view showing the structure of an antiglare film of
Fig. 2 is a view showing a method for producing an antiglare film of
FIG. 3 is a schematic view of a pricking inspection machine.
Description of the symbols
1 anti-glare film
3 anti-glare layer
16a display
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(embodiment 1)
Fig. 1 is a sectional view showing the structure of an
The
The
In the state where the
The haze value shown in the present embodiment is a value measured by a method based on JIS K7136.
The value of the standard deviation may be appropriately set within the above range, and is preferably a value within a range of 0 to 5.5, and more preferably a value within a range of 0 to 5.0. The value of the transmission image clarity (image clarity) of the optical comb width of 0.5mm may be set as appropriate within the above range, and is preferably a value within a range of 0% to 55%, and more preferably a value within a range of 0% to 50%.
The haze value of the
As described above, in the present embodiment, the value of the standard deviation of the luminance distribution of the
Therefore, the
Further, by setting the standard deviation of the
The
The
Examples of the material of the
The
The thickness of the
[ Structure of antiglare layer ]
The
The
The formation of the lenticular (island-like) protrusions on the surface of the
The plurality of elongated projections may be independent of each other or may be connected together. The phase separation structure of the
[ Material of antiglare layer ]
The plurality of resin components included in the
Examples of the polymer contained in the
Further, examples of the polymer include a polymer having a functional group participating in a curing reaction or a functional group reactive with a curable compound. The polymer may have a functional group in the main chain or a side chain.
Examples of the functional group include: a condensable group, a reactive group (e.g., a hydroxyl group, an acid anhydride group, a carboxyl group, an amino group, an imino group, an epoxy group, a glycidyl group, an isocyanate group, etc.), a polymerizable group (e.g., a C group such as a vinyl group, a propenyl group, an isopropenyl group, a butenyl group, an allyl group, etc.)2-6Alkenyl, ethynyl, propynyl, butynyl and the like C2-6Alkynyl, vinylidene, etc. C2-6An alkenylene group, a group having such a polymerizable group ((meth) acryloyl group, etc.), and the like. Among these functional groups, polymerizable groups are preferred.
Further, the
For example, when the 1 st polymer is a styrene-based resin (e.g., polystyrene, styrene-acrylonitrile copolymer), examples of the 2 nd polymer include: cellulose derivatives (e.g., cellulose esters such as cellulose acetate propionate), (meth) acrylic resins (e.g., polymethyl methacrylate), alicyclic olefinic resins (e.g., polymers of norbornene as a monomer), polycarbonate resins, and polyester resins (e.g., poly C)2-4Alkylene aryl ester copolyesters, etc.).
In addition, for example, in the 1 st polymer is a cellulose derivative (for example, cellulose acetate propionate and other cellulose ester cases), as the 2 nd polymer, can be cited: styrene resin(polystyrene, styrene-acrylonitrile copolymer, etc.), (meth) acrylic resin, alicyclic olefin resin (norbornene-based polymer, etc.), polycarbonate-based resin, polyester-based resin (poly C)2-4Alkylene aryl ester copolyesters, etc.).
Among the various types of polymers, at least cellulose esters (e.g., cellulose C such as cellulose diacetate, cellulose triacetate, cellulose acetate propionate, and cellulose acetate butyrate) may be contained2-4Alkyl carboxylic acid esters).
Here, the phase separation structure of the
From the viewpoint of obtaining the scratch resistance of the
Examples of the curable resin precursor include: a curable compound having a functional group that reacts with active energy rays (ultraviolet rays, electron beams, or the like), heat, or the like, and being curable or crosslinkable via the functional group to form a resin (particularly a cured resin or a crosslinked resin).
Examples of such compounds include thermosetting compounds, thermosetting resins (low molecular weight compounds having an epoxy group, a polymerizable group, an isocyanate group, an alkoxysilyl group, a silanol group, or the like (for example, epoxy resins, unsaturated polyester resins, urethane resins, silicone resins, and the like)), and photocurable (ionizing radiation curable) compounds that cure with ultraviolet rays, electron beams, or the like (ultraviolet curable compounds such as photocurable monomers and oligomers).
Preferable examples of the curable resin precursor include photocurable compounds that cure in a short time by ultraviolet rays, electron beams, and the like. Among them, particularly, an ultraviolet-curable compound is practical. In order to improve resistance such as scratch resistance, the photocurable compound preferably has 2 or more (preferably 2 to 15, and more preferably about 4 to 10) polymerizable unsaturated bonds in the molecule. Specifically, the photocurable compound is preferably an epoxy (meth) acrylate, a urethane (meth) acrylate, a polyester (meth) acrylate, a silicone (meth) acrylate, or a polyfunctional monomer having at least 2 polymerizable unsaturated bonds.
The curable resin precursor may contain a curing agent corresponding to the type of the curable resin precursor. For example, the thermosetting resin precursor may contain a curing agent such as an amine or a polycarboxylic acid, and the photocurable resin precursor may contain a photopolymerization initiator. Examples of the photopolymerization initiator include conventional components such as acetophenones, phenylpropanones, benzils, benzoins, benzophenones, thioxanthones, and acylphosphine oxides.
The curable resin precursor may further contain a curing accelerator. For example, the photocurable resin precursor may contain a photocurable accelerator such as a tertiary amine (e.g., dialkyl aminobenzoate) or a phosphine photopolymerization accelerator.
In the process for producing the
Here, the polymer and the cured resin or crosslinked resin formed by curing the curable resin precursor generally have refractive indices different from each other. In addition, in general, the refractive indices of a plurality of kinds of polymers (the 1 st polymer and the 2 nd polymer) are also different from each other. The difference in refractive index between the polymer and the cured resin or the crosslinked resin and the difference in refractive index between the plurality of types of polymers (the 1 st polymer and the 2 nd polymer) are, for example, preferably values in the range of 0 to 0.04, and more preferably values in the range of 0 to 0.02.
The
Examples of the organic fine particles include crosslinked acrylic acid particles and crosslinked styrene particles. Examples of the inorganic fine particles include silica particles and alumina particles. Further, as an example, the difference in refractive index between the fine particles contained in the
The average particle diameter of the fine particles is not particularly limited, and may be, for example, a value in the range of 0.5 μm or more and 5.0 μm or less. The average particle diameter is preferably a value in the range of 0.5 μm or more and 3.0 μm or less, and more preferably a value in the range of 0.5 μm or more and 2.0 μm or less.
The average particle size referred to herein is a 50% volume average particle size in the coulter counter method (the same applies to the average particle size described below). The particles may be solid or hollow. If the average particle diameter of the fine particles is too small, it is difficult to obtain antiglare properties, and if it is too large, there is a concern that the glare of the display may increase, so attention is required.
The thickness of the
The antiglare film in which the
The
The method for producing the
[ preparation Process ]
In the preparation step, a solution containing a solvent, a resin composition for constituting the
Examples of the solvent include: ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.), ethers (di-n-butyl ketone, etc.)
Alkane, tetrahydroFuran, etc.), aliphatic hydrocarbons (hexane, etc.), alicyclic hydrocarbons (cyclohexane, etc.), aromatic hydrocarbons (toluene, xylene, etc.), halogenated carbons (dichloromethane, dichloroethane, etc.), esters (methyl acetate, ethyl acetate, butyl acetate, etc.), water, alcohols (ethanol, isopropanol, butanol, cyclohexanol, etc.), cellosolves (methyl cellosolve, ethyl cellosolve, etc.), cellosolve acetates, sulfoxides (dimethyl sulfoxide, etc.), amides (dimethylformamide, dimethylacetamide, etc.), etc. Further, the solvent may be a mixed solvent.The resin composition preferably contains the thermoplastic resin, the photocurable compound, the photopolymerization initiator, the thermoplastic resin, and the photocurable compound. Alternatively, the resin composition is preferably a composition containing the mutually incompatible plural kinds of polymers, the photocurable compound, and the photopolymerization initiator.
The concentration of the solute (polymer, curable resin precursor, reaction initiator, and other additives) in the solution can be adjusted within a range in which phase separation of a plurality of resin components occurs and within a range in which the flow property, coating property, and the like of the solution are not impaired.
Here, the haze value of the
[ Forming Process ]
In the forming process, the solution prepared in the preparation process is cast or applied to the surface of a support (here, as an example, the base material film 2). Examples of the solution casting method and the solution coating method include conventional methods such as: spray coater, spin coater, roll coater, air knife coater, bar coater, reverse coater, wire bar coater, missing corner wheel coater, dip extrusion coater, die coater, gravure coater, mini gravure coater, screen coater, and the like.
The solvent is evaporated by drying from the solution cast or applied to the surface of the support. As the solution is concentrated during the evaporation, phase separation occurs due to decomposition of a plurality of resin components from the spinodal lines of the liquid phase, and a phase separation structure in which the distance between phases (pitch or mesh diameter) is relatively regular is formed. The co-continuous phase structure of the elongated projections can be formed by setting drying conditions and a compounding ratio that can improve the melt fluidity of the resin component after the solvent evaporation to a certain extent.
The evaporation of the solvent is preferably performed by heat drying, from the viewpoint that the elongated protrusions are easily formed on the surface of the
On the other hand, if the drying temperature is too high or the drying time is too long, the temporarily formed elongated protrusions may flow and the height may be lowered, but the structure of the elongated protrusions is maintained. Therefore, as a means for adjusting the antiglare property and the sliding property of the
When a co-continuous phase structure is formed and coarsened as the phase separation progresses due to the spinodal decomposition of a plurality of resin components from the liquid phase, the continuous phase is discontinuous to form a droplet phase structure (a sea-island structure of an independent phase such as a spherical, disk-like, or ellipsoidal structure). Here, depending on the degree of phase separation, an intermediate structure between the co-continuous phase structure and the droplet phase structure (phase structure in the process of phase transition from the co-continuous phase to the droplet phase) is also formed. After the solvent is removed, a layer having fine irregularities on the surface is formed.
[ curing step ]
In the curing step, the curable resin precursor in the solution is cured, whereby the phase separation structure formed in the forming step is fixed, and the
The irradiation with the active energy ray may be performed in an inert gas atmosphere. When the active energy ray is ultraviolet ray, as the light source, there can be used: a far ultraviolet lamp, a low pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a halogen lamp, a laser light source (a light source such as a helium-cadmium laser, an excimer laser, etc.), and the like.
In the case of forming the
Through the above steps, the
Here, as a method of suppressing glare of the
In
(embodiment 2)
The antiglare layer of the antiglare film of
The difference in refractive index between the matrix resin and the fine particles is set to a value in the range of 0 to 0.20. The difference in refractive index is more preferably a value in the range of 0 to 0.15, and still more preferably a value in the range of 0 to 0.07.
The average particle diameter of the fine particles is set to a value in the range of 0.5 μm or more and 5.0 μm or less. The average particle diameter of the fine particles is more preferably in the range of 0.5 μm or more and 3.0 μm or less, and still more preferably in the range of 0.5 μm or more and 2.0 μm or less.
Further, the variation in the particle diameter of the fine particles is preferably small, and for example, in the particle diameter distribution of the fine particles contained in the antiglare layer, the average particle diameter of 50 wt% or more of the fine particles contained in the antiglare layer is preferably controlled to be within 1.0 μm.
In this way, by using fine particles having a relatively uniform particle diameter and an average particle diameter set in the above range, uniform and appropriate irregularities can be formed on the surface of the antiglare layer. This can prevent the
The ratio of the weight of the matrix resin in the antiglare layer to the total weight of the plurality of microparticles can be set as appropriate. In the present embodiment, the ratio G2/G1 of the weight G1 of the matrix resin of the antiglare layer to the total weight G2 of the plurality of fine particles contained in the antiglare layer is a value in the range of 0.07 to 0.20. The ratio G2/G1 is preferably a value in the range of 0.10 or more and 0.20 or less, and more preferably a value in the range of 0.12 or more and 0.20 or less.
The fine particles dispersed in the matrix resin may be inorganic or organic, and preferably have good transparency. Examples of the organic microparticles include plastic beads. Examples of the plastic beads include: styrene beads (refractive index 1.59), melamine beads (refractive index 1.57), acrylic beads (refractive index 1.49), acrylic-styrene beads (refractive index 1.54), polycarbonate beads, polyethylene beads, and the like. The styrene beads may be crosslinked styrene beads and the acrylic beads may be crosslinked acrylic beads. The plastic beads preferably have hydrophobic groups on the surface. Examples of such plastic beads include styrene beads.
Examples of the matrix resin include at least one of a photocurable resin that is cured by an active energy ray, a solvent-drying resin that is cured by drying a solvent added at the time of coating, and a thermosetting resin.
Examples of the photocurable resin include: examples of the resin having an acrylate functional group include oligomers, prepolymers, and reactive diluents such as (meth) acrylates of polyfunctional compounds such as polyester resins, polyether resins, acrylic resins, epoxy resins, urethane resins, alkyd resins, spiro-acetal resins (spiro-acetal resins), polybutadiene resins, polythiol polyene resins, and polyols having relatively low molecular weights.
Specific examples of these include: monofunctional monomers and polyfunctional monomers such as ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, and N-vinylpyrrolidone, for example, poly (methylolpropane tri (meth) acrylate), hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1, 6-hexanediol di (meth) acrylate, and neopentyl glycol di (meth) acrylate.
When the photocurable resin is an ultraviolet curable resin, a photopolymerization initiator is preferably used. Examples of the photopolymerization initiator include: acetophenones, benzophenones, michlebenzylbenzoate, α -amyl oxime ester, tetramethylthiuram monosulfide, thioxanthones. Further, it is also preferable to use a photosensitizer in combination with the photocurable resin. Examples of the photosensitizer include n-butylamine, triethylamine, and poly-n-butylphosphine.
Examples of the solvent-drying resin include known thermoplastic resins. Examples of the thermoplastic resin include: styrene-based resins, (meth) acrylic resins, vinyl acetate-based resins, vinyl ether-based resins, halogen-containing resins, alicyclic olefin-based resins, polycarbonate-based resins, polyester-based resins, polyamide-based resins, cellulose derivatives, silicone-based resins, rubbers or elastomers, and the like. The solvent-drying resin is preferably a resin soluble in an organic solvent, and particularly preferably a resin soluble in an organic solvent and excellent in moldability, film-forming property, transparency and weather resistance. Examples of such a solvent-drying resin include: styrene resins, (meth) acrylic resins, alicyclic olefin resins, polyester resins, and cellulose derivatives (e.g., cellulose esters).
Here, when the material of the
Further, as the solvent drying type resin, there may be mentioned: vinyl resins, acetal resins, acrylic resins, polystyrene resins, polyamide resins, polycarbonate resins, and the like.
Examples of the thermosetting resin include: phenolic resins, urea resins, diallyl phthalate resins, melamine resins, guanamine resins, unsaturated polyester resins, polyurethane resins, epoxy resins, amino alkyd resins, melamine-urea co-condensation resins, silicone resins, polysiloxane resins, and the like. When a thermosetting resin is used as the matrix resin, at least any one of a curing agent such as a crosslinking agent or a polymerization initiator, a polymerization accelerator, a solvent, a viscosity modifier, and the like may be used in combination.
As an example, the method for manufacturing an antiglare film in
[ preparation Process ]
In the preparation step, a solution containing a solvent, a resin composition for constituting the antiglare layer, and fine particles is prepared. Examples of the solvent include: alcohols (isopropyl alcohol, methanol, ethanol, etc.), ketones (methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), cyclohexanone, etc.), esters (methyl acetate, ethyl acetate, butyl acetate, etc.), halogenated hydrocarbons, and aromatic hydrocarbons (toluene, xylene, etc.). To the solution, a known leveling agent may be further added. For example, the use of a fluorine-based or silicone-based leveling agent can impart good scratch resistance to the antiglare layer.
[ coating/curing Process ]
In the coating step, the solution prepared in the preparation step is cast or coated on the surface of a support (here, as an example, the base material film 2) by the same method as in
In the case where the base resin is a photocurable resin, after the coating step, as an example, a curing step by ultraviolet rays or electron beams is performed. Examples of the ultraviolet source include: various mercury lamps, ultraviolet carbon arc lamps, black light lamps, and metal halide lamps. The wavelength range of ultraviolet light is, for example, a wavelength range of 190nm to 380 nm.
Further, as the electron beam source, a known electron beam accelerator can be cited. Specifically, there may be mentioned: van der Waals type, Korokhv-Waardon type, resonance transformer type, insulated core transformer type, linear type, high frequency high voltage (Dynamitron) type, high frequency type, and the like.
By curing the matrix resin contained in the solution, the position of the fine particles in the matrix resin can be fixed. This makes it possible to form an antiglare layer having a structure in which a plurality of fine particles are dispersed in a matrix resin and irregularities are formed on the surface of the matrix resin.
According to the antiglare film of
Further, since the ratio G2/G1 of the antiglare layer is set to a value in the range of 0.07 or more and 0.20 or less, an antiglare film having an antiglare layer in which a plurality of fine particles are dispersed in a matrix resin can be favorably produced.
(embodiment 3)
The antiglare layer 33 of the antiglare film of
Specifically, the antiglare film of
As shown in fig. 2, in this manufacturing method, the
The ultraviolet curable resin precursor adheres to the peripheral surface of the
The layer of the ultraviolet curable resin precursor (hereinafter referred to as a coating layer) applied to the
The coating layer having the uneven shape transferred to the surface by the
Here, the uneven portions on the surface of the
The
Thus, the method for producing an antiglare film of
The average particle diameter of the sprayed particles used in step (b) may be appropriately set, but may be set to a value in a range of 10 μm or more and 50 μm or less, as an example. The average particle diameter of the ejected particles is more preferably in the range of 20 μm to 45 μm, and still more preferably in the range of 30 μm to 40 μm. This can provide the antiglare layer 33 with the surface having the uneven shape formed thereon.
The mold used in
Examples of the material of the mold include metal, plastic, and wood. A coating film may be provided on the contact surface of the mold with the coating layer in order to improve the durability (abrasion resistance) of the mold. As an example, the material of the sprayed particles may be metal, silica, alumina, or glass. The ejected particles may strike the surface of the mold, for example, by the pressure of a gas or liquid. In addition, if the cured resin precursor is of an electron beam curing type, an electron beam source such as an electron beam accelerator may be used instead of the
In the antiglare film of
The antiglare layer of the antiglare film of each of the above embodiments may further include an upper layer disposed on the surface opposite to the
The thickness of the upper layer can be set as appropriate, and can be set to a value in the range of 0.5 μm to 20 μm, for example. The thickness of the upper layer is preferably a value in the range of 2.0 μm or more and 12 μm or less, and more preferably a value in the range of 3.0 μm or more and 8.0 μm or less. Hereinafter, a pricking checker and a pricking evaluation method for checking and evaluating the antiglare film of each of the above embodiments will be described in order.
(dazzling inspection machine)
Fig. 3 is a schematic diagram of the
The
As one example, the photographing
The holding
The display device 16 is placed on the
In the
The
The
As a method for adjusting the pixel size of an image captured per unit pixel (for example, 1 pixel) of an imaging element when an image displayed on the
(evaluation method of eyes)
Next, a method of evaluating a prick using the
Next, an adjustment step of adjusting the pixel size of the film-mounted
The relative distance between the
After the adjustment step is performed, a setting step of setting a measurement area for evaluating the glare of the
After the adjustment step, an imaging step is performed to image the measurement area of the
After the image capturing step, the
Here, the larger the unevenness in luminance of the film-mounted
Through the above steps, the standard deviation of the luminance distribution of the
(examples and comparative examples)
The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.
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