Anti-dazzle film
阅读说明:本技术 防眩膜 (Anti-dazzle film ) 是由 菅原庆峰 林正树 于 2018-06-25 设计创作,主要内容包括:本发明提供一种防眩膜,其安装于显示器的表面,且具有防眩层,所述防眩层的刺目值为10以下范围的值,所述刺目值是基于在安装于显示器表面的状态下显示器的亮度分布的标准偏差的值而规定的值,所述防眩层的以60度镜面光泽测定的镜面光泽度为40%以下范围的值,并且,所述防眩层在光梳宽度0.5mm的透射图像清晰度被设定为40%以下范围的值。由此,可适当地抑制显示器的刺目,同时具有良好的防眩性。(The present invention provides an antiglare film which is attached to a surface of a display and has an antiglare layer, a glare value of the antiglare layer is a value in a range of 10 or less, the glare value is a value specified based on a value of a standard deviation of a luminance distribution of the display in a state of being attached to the surface of the display, a specular gloss of the antiglare layer measured with a specular gloss of 60 degrees is a value in a range of 40% or less, and a transmission image clarity of the antiglare layer at a comb width of 0.5mm is a value in a range of 40% or less. This can suitably suppress glare of the display and has excellent antiglare properties.)
1. An antiglare film which is attached to a surface of a display,
wherein the anti-glare film is provided with an anti-glare layer,
the glare value of the antiglare layer is a value in a range of 10 or less, the glare value being a value defined based on a value of a standard deviation of a luminance distribution of the display in a state of being attached to the surface of the display,
the antiglare layer has a specular gloss measured at 60 degrees specular gloss of 40% or less, and,
the transmission image clarity of the antiglare layer at an optical comb width of 0.5mm is set to a value in the range of 40% 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 1,
the antiglare layer comprises a matrix resin and a plurality of fine particles 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.
4. The antiglare film of claim 3,
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 0.03 to 0.20.
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, for example, a roughened surface and irregularities formed thereon, and is attached to a surface of a display to scatter external light and prevent reflection of the external light to the display.
Examples of the method for forming the unevenness on the surface of the antiglare film include: a method of dispersing fine particles (filler) in a matrix resin as disclosed in patent document 1 (hereinafter referred to as a fine particle dispersion method); a method using a phase separation structure formed by spinodal decomposition of a liquid phase of a plurality of polymers as disclosed in patent document 2 (hereinafter referred to as a phase separation method); a method of transfer molding of an uneven shape using a mold (hereinafter referred to as transfer molding method) as disclosed in patent document 3, and the like.
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 can be prevented, display performance of the display via the antiglare film may be deteriorated.
In particular, if an antiglare film is attached to the surface of a display or the like having high-definition pixels, the pixels of the display may be observed in an enlarged manner due to refraction of light from the display transmitted through the antiglare film by the surface irregularities of the antiglare film or due to a lens effect caused by the surface irregularities of the antiglare film, which may cause glare and make it difficult to observe an image.
As a method for suppressing glare of the display, for example, it is conceivable to reduce the surface unevenness of the antiglare film, but if the surface unevenness of the antiglare film is reduced, there is a concern that the antiglare property is lowered.
Accordingly, an object of the present invention is to provide an antiglare film which can suitably suppress glare of a display and has excellent antiglare properties.
Means for solving the problems
An antiglare film according to an embodiment of the present invention is an antiglare film attached to a surface of a display, the antiglare film having an antiglare layer, a glare value of the antiglare layer, which is specified based on a value of a standard deviation of a luminance distribution of the display in a state of being attached to the surface of the display, being in a range of 10 or less, a specular gloss of the antiglare layer measured with a specular gloss of 60 degrees being in a range of 40% or less, and a transmission image clarity of the antiglare layer at a comb width of 0.5mm being in a range of 40% or less.
Here, the glare value is a value that serves as an objective index that can quantitatively evaluate the glare of the display. Specifically, the glare value is a value defined based on the value of the standard deviation of the luminance distribution of the display, and indicates the degree of irregularity of the bright points on the display.
The transmission clarity is a value related to whether the antiglare property is good or not, and there is a relationship that the smaller the transmission clarity is, the higher the antiglare property is.
The glare value, specular gloss, and transmission image clarity can be achieved, for example, by adjusting the type of phase separation material to be combined, the heating temperature of the composition in the drying process, the amount of dry air blown to the composition, or the line speed in the case of forming the antiglare layer by a phase separation method in the production process thereof. For example, in the case of forming an antiglare layer by a fine particle dispersion method, the antiglare layer can be formed by adjusting the difference between the refractive index of the matrix resin and the refractive index of the plurality of fine particles dispersed in the matrix resin to a predetermined range in the production process thereof. In order to set the difference in refractive index between the matrix resin and the fine particles within a predetermined range, a material that provides a predetermined difference in refractive index is selected as the material used for both, or the shape and number of the fine particles, the density of the fine particles contained in the matrix resin, and the like are adjusted. Further, the value of G2/G1, which is the ratio of the weight G1 of the matrix resin to the total weight G2 of the plurality of microparticles, was adjusted.
According to the above configuration, the glare value of the antiglare layer is in the range of 10 or less, and therefore, the glare can be effectively suppressed by setting so as to be based on quantitative evaluation.
In addition, the antiglare layer is set to a value in a range such that the transmission image clarity is 40% or less. Thus, the antiglare layer can obtain high antiglare properties regardless of the magnitude of the haze value as another index relating to the presence or absence of the antiglare properties.
Further, since the specular gloss measured with a 60-degree specular gloss is set to a value in the range of 40% or less, reflection of external light can be suppressed.
As a result, the antiglare film according to one embodiment of the present invention exhibits an effect of appropriately suppressing glare of a display and having excellent antiglare properties.
In addition, the antiglare film according to one embodiment of the present invention may have the following configuration: in the above configuration, the antiglare layer contains a plurality of resin components, and has a co-continuous phase structure formed by phase separation of the plurality of resin components.
In addition, the antiglare film according to one embodiment of the present invention may have the following configuration: in the above configuration, the antiglare layer includes 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 is a value in a range of 0 to 0.07.
In this way, by setting the difference in refractive index between the matrix resin and the fine particles to a predetermined range and dispersing a plurality of fine particles in the matrix resin, glare of the display can be appropriately suppressed and a good antiglare property can be obtained.
In addition, the antiglare film according to one embodiment of the present invention may have the following configuration: in the above configuration, 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 is a value in a range of 0.03 to 0.20.
Thus, an 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
The present invention is configured as described above, and the antiglare film exhibits an effect of appropriately suppressing glare of a display and having a good antiglare property.
Drawings
Fig. 1 is a sectional view showing the structure of an antiglare film according to an embodiment of the present invention.
Fig. 2 is a view showing the method for producing an antiglare film according to embodiment 3.
Fig. 3 is a diagram showing an example of a schematic configuration of the pricking evaluation apparatus according to the embodiment of the present invention.
Description of the symbols
1 anti-glare film
3 anti-glare layer
16a display
Detailed Description
Embodiments of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a sectional view showing the structure of an
The
The antiglare layer 3 is formed on at least one surface of the
The antiglare layer 3 is set so that the glare value is in the range of 10 or less. The glare value is defined based on the value of the standard deviation of the luminance distribution of the display 16a in a state where the
The antiglare layer 3 is set so that the transmission image clarity (image clarity) with an optical comb width of 0.5mm is a value in the range of 40% or less. The transmission image clarity is a standard for quantifying the blur and distortion of light transmitted through the antiglare layer 3, and is a value measured by a measurement method according to JIS K7105.
The specular gloss (60-degree gloss) of the antiglare layer 3 measured with 60-degree specular gloss is set to a value in the range of 20% or less. The specular gloss is generally called gloss, and is a value representing the degree of specular reflection light on the surface of an object, and is a value measured according to JIS K7136. The range of the haze value of the antiglare layer 3 is not particularly limited.
As described above, the
In addition, the transmission clarity can be suppressed to a value in the range of 40% or less. Thereby, the antiglare layer 3 can obtain high antiglare properties regardless of the magnitude of the haze value as another index relating to the presence or absence of the antiglare properties.
Further, since the specular gloss (60-degree gloss) of the antiglare layer 3 measured with a 60-degree specular gloss is set to a value in the range of 40% or less, reflection of light onto the surface of the display 16a can be suppressed.
The adhesive layer 4 is disposed between the surface of the display 16a and the
Specific examples of the
[ base film ]
Examples of the material of the
The
The thickness of the
(embodiment 1)
[ Structure of anti-glare layer in embodiment 1]
The antiglare layer 3 of
The antiglare layer 3 of
By forming the antiglare layer 3 of
The plurality of elongated projections may be independent of each other or may be connected together. The phase separation structure of the antiglare layer 3 of
[ Material of antiglare layer according to embodiment 1]
The plurality of resin components contained in the antiglare layer 3 of
Examples of the polymer contained in the antiglare layer 3 of
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.), and a polymerizable group (e.g., C 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.
The antiglare layer 3 of
For example, when the 1 st polymer is a styrene resin (e.g., polystyrene, styrene-acrylonitrile copolymer), the 2 nd polymer may be a cellulose derivative (e.g., cellulose ester such as cellulose acetate propionate), a (meth) acrylic resin (e.g., polymethyl methacrylate), an alicyclic olefin resin (e.g., a polymer containing norbornene as a monomer), a polycarbonate resin, or a polyester resin (e.g., poly-C)2-4Alkylene aryl ester copolyesters, etc.).
In the case where the 1 st polymer is a cellulose derivative (e.g., cellulose esters such as cellulose acetate propionate), the 2 nd polymer may be a styrene resin (e.g., polystyrene or a styrene-acrylonitrile copolymer), a (meth) acrylic resin, an alicyclic olefin resin (e.g., a polymer containing norbornene as a monomer), a polycarbonate resin, or a polyester resin (e.g., a 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 antiglare layer 3 of
From the viewpoint of obtaining scratch resistance, at least one polymer contained in the plurality of types of polymers is preferably a polymer having a functional group reactive with the curable resin precursor in a side chain. As the polymer forming the phase separation structure, a thermoplastic resin or other polymer may be contained in addition to the two polymers incompatible with each other. The mass ratio M1/M2 of the mass M1 of the 1 st polymer to the mass M2 of the 2 nd polymer and the glass transition temperature of the polymer can be set as appropriate.
Examples of the curable resin precursor include: a curable compound having a functional group that reacts with active energy rays (ultraviolet rays, electron beams, etc.) or heat, and being curable or crosslinkable via the functional group to form a resin (particularly a cured resin or a crosslinked resin).
Examples of such a compound include a thermosetting compound, a thermosetting resin (a low molecular weight compound having an epoxy group, a polymerizable group, an isocyanate group, an alkoxysilyl group, a silanol group, or the like (for example, an epoxy resin, an unsaturated polyester resin, a urethane resin, a silicone resin, or the like)), a photocurable (ionizing radiation curable) compound that cures with ultraviolet light or an electron beam (an ultraviolet curable compound such as a photocurable monomer and an oligomer), and the like.
Preferred examples of the curable resin precursor include photocurable compounds that cure in a short time by ultraviolet light, electron beams, or 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)), a phosphine photopolymerization accelerator, and the like.
In the process for producing the antiglare layer 3 of
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 types 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 in the range of 0 to 0.2, and more preferably in the range of 0 to 0.07.
The antiglare layer 3 may contain a plurality of fine particles (filler) dispersed in the matrix resin. The fine particles may be any of organic fine particles and inorganic fine particles, and the plurality of fine particles may include a plurality of types of fine particles.
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 antiglare layer 3 and the matrix resin may be set to a value in the range of 0 or more and 0.2 or less. The difference in refractive index is preferably a value in the range of 0 to 0.15, and more preferably a value in the range of 0 to 0.07.
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 4.0 μm or less, and more preferably a value in the range of 1.0 μm or more and 3.0 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 increases, and thus attention is required.
The thickness of the antiglare layer 3 of
In this case, the thickness of the antiglare layer 3 may be, for example, a value in the range of 1 μm or more and 100 μm or less, and more preferably a value in the range of 3 μm or more and 50 μm or less.
The antiglare layer 3 of
The method for producing the
[ preparation Process ]
In the preparation step, a solution containing a solvent and the resin composition for constituting the antiglare layer 3 of
Examples of the solvent include: ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.), ethers (di-n-butyl ketone, etc.)
Alkanes, 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.), and the like. Further, the solvent may be a mixed solvent.As the resin composition, a thermoplastic resin, a photocurable compound, a photopolymerization initiator, and a composition containing a thermoplastic resin and a photocurable compound are preferable. Alternatively, as the resin composition, a composition containing mutually incompatible plural kinds of polymers, a photocurable compound, and a photopolymerization initiator is preferable.
The concentration of the solute (polymer, curable resin precursor, reaction initiator, and other additives) in the mixed solution can be adjusted within a range in which phase separation of the plurality of resin components occurs and within a range in which the flow properties, coating properties, and the like are not impaired.
[ Forming Process ]
In the forming process, the solution prepared in the preparation process is cast or applied to the surface of a support (here, the
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 produced by setting drying conditions and a compounding ratio which 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 heating and drying, from the viewpoint of easily forming the elongated projections on the surface of the antiglare layer 3 of
On the other hand, if the drying temperature is too high or the drying time is too long, the temporarily formed elongated projections may flow and the height may be lowered, but the structure is maintained. Therefore, since the glare value, the specular gloss, the transmission image clarity, and the haze value of the antiglare layer 3 can be set to values in the ranges satisfying the above-described conditions, the adjustment of the combination of the phase separation materials, the adjustment of the drying temperature and the drying time, the adjustment of the height of the elongated protrusions, and the like can be realized. In the forming step, a co-continuous phase structure in which phase-separated structures are connected to each other can be produced by increasing the evaporation temperature of the solvent or by using a component having low viscosity as the resin component.
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, regular spherical, disk-shaped, 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 contained in the solution is cured, whereby the phase separation structure formed in the forming step is fixed, and the antiglare layer 3 of
The irradiation with the active energy ray may be performed in an inert gas atmosphere as needed. 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 adhesive layer 4, after preparing a solution containing an adhesive component, the solution can be formed by coating and drying the other surface of the
Through the above steps, the
Here, as a method of suppressing glare of the display 16a, for example, reduction of surface unevenness of the antiglare layer may be considered, but there is a possibility that the antiglare property of the antiglare film is lowered. However, by increasing the number of the unevenness while increasing the inclination of the unevenness of the antiglare layer to steepen the unevenness in addition to reducing the unevenness of the antiglare layer, the antiglare property can be improved while suppressing glare of the display.
In
The antiglare layer 3 of another embodiment (
(embodiment 2)
The antiglare layer 3 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 0.2. 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 4.0 μm or less, and still more preferably in the range of 1.0 μm or more and 3.0 μm or less.
Further, it is preferable that the variation in the particle diameter of the fine particles is small, and for example, in the particle diameter distribution of the fine particles contained in the antiglare layer 3, the average particle diameter of 50 wt% or more of the fine particles contained in the antiglare layer 3 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 unevenness can be formed on the surface of the antiglare layer 3. This can prevent the display 16a from being dazzled while ensuring antiglare properties.
The ratio of the weight of the matrix resin to the total weight of the plurality of fine particles in the antiglare layer 3 can be set as appropriate. In
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 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 thereof 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, and examples of the photopolymerization initiator include acetophenones, benzophenones, michlebenzylbenzoate (michlebenzylbenzoylbenzoate), α -pentyloxime ester, tetramethylthiuram monosulfide, and thioxanthones.
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 the
[ preparation Process ]
In the preparation step, a solution containing a solvent, and the resin composition and fine particles for constituting the antiglare layer of
[ 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, 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, and high frequency type.
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
(embodiment 3)
The antiglare layer 3 of the
As an example, the
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
As the
Thus, the method for producing the
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. Thus, the antiglare layer 3 of embodiment 3 having the uneven surface shaped can be obtained.
The mold used in embodiment 3 may be a roll-shaped mold, or may be a plate-shaped mold (embossed plate), for example. Further, the antiglare layer 3 of embodiment 3 may be formed by forming a coating layer (resin layer) on one surface of the
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
The antiglare layer 3 of the
The thickness of the upper layer can be set as appropriate, and can be set to a value in the range of, for example, 10nm or more and 2.0 μm or less. The thickness of the upper layer is more preferably 50nm or more and 1.0 μm or less, and still more preferably 70nm or more and 0.5 μm or less.
Next, an evaluation apparatus and an evaluation method for quantitatively evaluating the glare of the
(dazzling inspection machine)
Fig. 3 is a diagram showing an example of a schematic configuration of the pricking inspection machine 10 according to the embodiment of the present invention. The glare checker 10 is a device for checking the glare size of the display 16a of the display device 16 to which the
The housing 11 is a part for forming a dark room as an inspection space for evaluation of glare, and is formed in a hollow rectangular parallelepiped shape. The housing 11 houses therein: an imaging device 12, a holding unit 13, an imaging device holder 14, a display device holder 15, and a display device 16 to be evaluated for glare. The housing 11 is configured to prevent light from entering the housing 11 from the outside when the image pickup device 12 picks up an image.
As one example, the photographing device 12 is an Area camera (Area camera) having a lens 18 and a photographing element, which photographs an image displayed on the display 16 a. The imaging device 12 is held by the holding portion 13 so that the lens 18 faces the display 16 a. The imaging device 12 is connected to the image processing device 17, and image data captured by the imaging device 12 is transmitted to the image processing device 17.
The holding portion 13 is a member having a bar shape extending in the vertical direction (the vertical direction in fig. 3), and the base end side of the holding portion 13 is fixed by the imaging device holder 14, and the imaging device 12 is held on the tip end side. The imaging device 12 is movable in the vertical direction by the holding unit 13, and the relative distance between the display 16a and the lens 18 can be changed.
The display device 16 is placed on the upper surface of the display device holder 15 in a state where the display 16a with the
In the pricking checker 10, the size of an image displayed on the display 16a photographed by the photographing element of the photographing device 12 is adjusted by adjusting the relative distance between the photographing device 12 and the display 16 a. In other words, the pixel size of the image displayed on the display 16a captured per unit pixel (for example, 1 pixel) of the imaging element of the imaging device 12 can be adjusted.
The image processing device 17 performs data processing of the image data captured by the imaging device 12. Specifically, the image processing device 17 obtains a value of a standard deviation of the luminance of the image displayed on the display 16a from the image data captured by the imaging device 12.
The image processing apparatus 17 of the present embodiment includes: an input unit for inputting image data captured by the imaging device 12, an image processing unit for performing image processing on the input image data, and an output unit for outputting the result of the processing by the image processing unit to a display, a printing device, or the like, not shown.
Note that, as a method of adjusting the pixel size of an image displayed on the display 16a captured by each unit pixel (for example, 1 pixel) of the image pickup device, in addition to a method of changing the relative distance between the image pickup device 12 and the display 16a, when the lens 18 provided in the image pickup device 12 is a zoom lens, a method of changing the focal distance of the image pickup device 12 may be used.
(evaluation method of eyes)
Next, a method of evaluating a prick using the prick inspection machine 10 will be described. In this glare evaluation method, for the purpose of evaluation, the display 16a in a state in which the
First, the pixel size of the display 16a mounted with the
In the adjustment step, the relative distance between the imaging device 12 and the display 16a with the
The relative distance between the imaging device 12 and the display device 16 is preferably set in consideration of the actual use mode of the display device 16 (for example, the relative distance between the eyes of the user and the display 16 a).
After the adjustment step is performed, a measurement region for evaluating the glare of the display 16a to which the
After the adjustment step, the measurement area of the display 16a with the
After the image pickup step, the image processing device 17 obtains the luminance unevenness in the image of the measurement area of the display 16a to which the
Through the above steps, the standard deviation of the luminance distribution of the display 16a in the state where 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.