JP4698723B2 - Anti-glare film, polarizing plate and transmissive display device - Google Patents

Description

The present invention relates to an antiglare film provided on the surface of a high-definition image display such as a CRT or liquid crystal panel used for image display of a computer, a word processor, a television, etc., a polarizing plate using the antiglare film, and a transmissive display device. .

In the display as described above, an anti-glare film for diffusing the light emitted from the inside to some extent is mainly dazzling when viewing the display surface when the light emitted from the inside goes straight without diffusing on the display surface. It is provided on the display surface.

This antiglare film is formed by coating a resin containing a filler such as silicon dioxide (silica) on the surface of a transparent base film as disclosed in, for example, Patent Document 1, Patent Document 2, and the like. is there.

These antiglare films are a type in which an irregular shape is formed on the surface of the antiglare layer by agglomeration of particles such as cohesive silica, and an organic filler having a particle size larger than the film thickness of the coating film is added to the resin. There is a type in which a concavo-convex shape is formed on the surface, or a type in which a concavo-convex shape is transferred by laminating a film having ruggedness on the surface of the layer.
JP-A-6-18706 Japanese Patent Laid-Open No. 10-20103

The conventional anti-glare film as described above is designed to obtain light diffusing and anti-glare action by the action of the surface shape of the anti-glare layer in any type. However, when the unevenness becomes large, there is a problem that the haze value of the coating film increases, and the transmission sharpness decreases accordingly.

Furthermore, the conventional type of antiglare film has a problem in that the surface of the film has a sparkling sparkle called so-called scintillation, and the visibility of the display screen is lowered.

In order to solve the above-mentioned problems, the inventors have developed an anti-glare film that can improve transmission clarity and reduce scintillation without reducing diffusion and anti-glare properties, The application is filed as Japanese Patent Application No. 10-125494. However, it did not have anti-reflection properties as well as diffusion / anti-glare properties.

As a method of imparting antireflection properties, a method of applying an antireflection coating to the surface of glass or plastic, a very thin film such as MgF ₂ having a thickness of about 0.1 μm, or a metal vapor deposition film is provided on the surface of a transparent substrate such as glass. A method of coating an ionizing radiation curable resin on a plastic surface such as a plastic lens and forming a SiO ₂ or MgF ₂ film thereon by vapor deposition; a low refractive index on a cured film of the ionizing radiation curable resin; A method for forming a coating film is known.

However, in the antiglare film, the surface unevenness of the surface is used to obtain light diffusion / antiglare action. Therefore, the surface cannot be coated as described above. However, there is a problem that the antireflection property cannot be provided at the same time.

The present invention has been made in view of the above-described conventional problems, and can improve transmission clearness, reduce scintillation, and reduce reflection without reducing diffusion and antiglare properties. An object is to provide an antiglare film having a preventive property, a polarizing plate using the antiglare film, and a transmissive display device.

The present invention, as in claim 1, includes at least a transparent substrate film, and an antiglare layer containing at least a first light transmitting fine particle and a second light transmitting fine particle having different refractive indexes in the light transmitting resin. , And the first translucent fine particles are larger than the refractive index of the second translucent fine particles and 0.04 to 0. 0 than the refractive index of the translucent resin. 20 rather large, the first light-transmitting particulate material and a second light-transmitting fine particle, the antiglare film, characterized in that both monodisperse organic fine particles, is to achieve the above object.

The first translucent fine particles may be styrene beads, and the second translucent fine particles may be acrylic beads or acrylic-styrene beads.
The particle size of the second light-transmitting fine particles may be larger than the film thickness of the antiglare layer.
The second light-transmitting fine particles may protrude from the surface of the antiglare layer by 0.1 to 0.3 μm, and the refractive index difference from the light-transmitting resin may be 0.3 or less .
Furthermore, the particle diameter of the first translucent fine particles may be 0.5 to 2.0 μm.

The invention relating to the polarizing plate is as described in claim 5, wherein the polarizing element and the above-described anti-glare layer laminated on the surface of the polarizing element with the surface opposite to the anti-glare layer in the transparent base film are directed. The above-mentioned object is achieved by comprising a dazzling film.

Furthermore, the invention of the transmissive display device as in claim 6 is a flat translucent display, a light source device that irradiates the translucent display from the back, and the surface of the translucent display. A transmissive display device having the above-described anti-glare film laminated on is formed to achieve the above object.

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, an antiglare film 10 according to an example of an embodiment of the present invention includes a transparent base film 12, a first translucent fine particle 16 and a second translucent resin 14. The antiglare layer 18 including the translucent fine particles 46 is laminated, and the first translucent fine particles 16 have a particle diameter of 0.5 to 2.0 μm and the translucent resin. The second translucent fine particles 46 have a refractive index difference of 0.3 or less with respect to the translucent resin. The second light-transmitting fine particles protrude from the surface of the antiglare layer.

FIG. 2 is an enlarged view of a part of FIG. 1, and the second light transmitting fine particles protrude from the surface of the antiglare layer by d, and the value of d is 0.1 to 0.1 as described above. 0.3 μm. Moreover, the 1st translucent fine particle 16 is contained in the glare-proof layer 18 whole, and one part of 1st translucent fine particle 16 protrudes from the surface of the glare-proof layer.

In the configuration of the antiglare film 10, the first light transmitting fine particles 16 mainly contribute to diffusion / scintillation prevention, and the second light transmitting fine particles 46 mainly contribute to antiglare property and antireflection property. Yes.

The transparent base film 12 is a resin film such as a triacetyl cellulose film, and the translucent resin 14 can be cured after being applied to the transparent base film 12, for example, an ultraviolet curable resin (with a refractive index of 1. 51), the first translucent fine particles 16 are made of translucent resin, for example, styrene beads (refractive index 1.60), and the second translucent fine particles 46 are translucent resins. For example, it is composed of acrylic beads (refractive index 1.49).

The difference in refractive index between the first translucent fine particles 16 and the translucent resin 14 is set to 0.04 or more when the refractive index difference is less than 0.04 from the viewpoint of antiglare properties. The difference in refractive index between the two is too small to obtain a light diffusion effect, and when the difference in refractive index is larger than 0.20, the light diffusibility is too high and the entire film is whitened. Because. The refractive index difference is most preferably 0.04 or more and 0.1 or less. The refractive index difference is also preferable from the viewpoint of antireflection properties, as will be described later.

The reason why the particle diameter of the first light-transmitting fine particles 16 is 0.5 μm or more is that the amount of the first light-transmitting fine particles 16 to be added to the light-transmitting resin 14 is less than 0.5 μm. This is because the light diffusing effect cannot be obtained unless it is very large. Moreover, the particle diameter of the first light-transmitting fine particles 16 is set to 2.0 μm or less. When the particle diameter exceeds 2.0 μm, the surface shape of the antiglare layer 18 becomes rough and the haze value becomes high. Because it will end up. Ideally, the diameter of the first translucent fine particles 16 is not less than 1 μm and not more than 2 μm.

If it does as mentioned above, the state which maintained high permeation | transmission clarity, without the whole film whitening by the slight refractive index difference of the 1st translucent fine particle 16 which is a filler, and translucent resin 14 Thus, the light transmitted through the antiglare film 10 can be averaged by the diffusion effect.

For this reason, even when the haze value of the film is high, glare on the surface can be prevented without lowering the transmission sharpness, and even when the haze value is low (haze value of 20 or less), higher transmission is possible. Surface glare (scintillation) can be prevented while maintaining sharpness.

The second translucent fine particles 46 have a refractive index difference of 0.3 or less with respect to the translucent resin, and are formed to protrude by 0.1 to 0.3 μm from the surface of the antiglare layer. The reason is that the thickness is such that optical interference occurs in the protruding portion, although the reason is not clear.

For example, the condition for preventing the reflection of light by 100% and transmitting the light by 100% is that the condition that the incident light is perpendicularly incident on the thin film is a specific wavelength λ0, and the antireflection layer for this wavelength. It is known that the relationship of the following formulas (1) and (2) must be satisfied, where n is the refractive index of n, the thickness of the antireflection film is h, and the refractive index of the substrate is ng. (Science Library Physics = 9 “Optics”, pp. 70-72, 1980, published by Science Co., Ltd.).

n0 = √ng (1)
n0 h = λ0 / 4 (2)

That is, when the refractive index is greater than 1, ng> n0 is always satisfied. Therefore, assuming that the antireflection layer is formed on the surface of the antiglare layer, the refractive index n0 of the antireflection layer must be smaller than the refractive index ng of the antiglare layer.

For example, when a material having a refractive index n0 = 1.49 is used for the antireflection layer, when the wavelength of incident light is λ0 = 550 nm, the thickness h of the antireflection film is about 0. 1 μm is calculated to be optimal.

In the present invention, the second translucent fine particles 46 having a refractive index difference of 0.3 or less from the translucent resin are projected from the surface of the antiglare layer by 0.1 to 0.3 μm. A state in which a film having a refractive index lower than that of the antiglare layer is formed on the surface of the antiglare layer with an appropriate film thickness is formed in a pseudo manner, and as a result, optical interference occurs in the protruding portion, which is simple. Antireflection effect can be exhibited.

The second light transmitting fine particles 46 have a difference in refractive index from the light transmitting resin of greater than 0.3, a protrusion from the surface of the antiglare layer of less than 0.1 μm, or a protrusion. If it is larger than 0.3 μm, the optical interference effect is lowered and sufficient antireflection properties cannot be obtained.

Further, since the second translucent fine particles 46 are formed so as to protrude from the surface of the antiglare layer by 0.1 to 0.3 μm, fine irregularities are formed on the surface. It produces the anti-glare effect.

Examples of the material of the transparent base film 12 include a transparent resin film, a transparent resin plate, a transparent resin sheet, and transparent glass.

Transparent resin films include triacetyl cellulose (TAC) film, polyethylene terephthalate (PET) film, diacetylene cellulose film, acetate butyrate cellulose film, polyethersulfone film, polyacrylic resin film, polyurethane resin film, polyester A film, a polycarbonate film, a polysulfone film, a polyether film, a polymethylpentene film, a polyether ketone film, a (meth) acrylonitrile film, or the like can be used. The thickness is usually about 25 μm to 1000 μm.

As the transparent substrate film 12, a TAC film having no birefringence can be used to produce a polarizing plate by laminating an antiglare film with a polarizing element (described later), and display quality using the polarizing plate. Is particularly preferable because an excellent liquid crystal display device can be obtained.

In addition, PET is particularly desirable as the transparent base film 12 from the viewpoint of processability such as heat resistance, solvent resistance and mechanical strength when the antiglare layer 18 is applied by various coating methods.

The translucent resin 14 that forms the antiglare layer 18 is a resin that is mainly cured by ultraviolet rays and electron beams, that is, an ionizing radiation curable resin, a mixture of an ionizing radiation curable resin and a thermoplastic resin and a solvent, Three types of thermosetting resins are used. The thickness is usually about 0.5 μm to 50 μm, preferably 1 μm to 20 μm, more preferably 2 μm to 10 μm.

The film forming component of the ionizing radiation curable resin composition is preferably one having an acrylate functional group, such as a relatively low molecular weight polyester resin, polyether resin, acrylic resin, epoxy resin, urethane resin, alkyd resin, Oligomers such as (meth) acrylates of polyfunctional compounds such as spiroacetal resins, polybutadiene resins, polythiol polyene resins, and polyhydric alcohols (hereinafter referred to as (meth) acrylates in the present specification). It is composed of an ionizing radiation curable resin containing a relatively large amount of a prepolymer and a reactive diluent. Examples of the diluent include monofunctional monomers such as ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, vinyltoluene, N-vinylpyrrolidone, and polyfunctional monomers such as trimethylolpropane 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, neo Examples include pentyl glycol di (meth) acrylate.

Further, when the ionizing radiation curable resin is used as an ultraviolet curable resin, acetophenones, benzophenones, Michler benzoylbenzoate, α-amyloxime esters, thioxanthones, etc. In addition, n-butylamine, triethylamine, tri-n-butylphosphine and the like can be mixed and used as a photosensitizer. In particular, in the present invention, it is preferable to mix urethane acrylate as an oligomer and dipentaerythritol hexa (meth) acrylate as a monomer.

Furthermore, as the translucent resin 14 for forming the antiglare layer 18, a solvent-drying resin may be included in the ionizing radiation curable resin as described above. The solvent-drying resins mainly include thermoplastic resins such as senol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, and melamine-urea. A condensation resin, a silicon resin, a polysiloxane resin, or the like is used.

As the type of solvent-drying thermoplastic resin to be added to the ionizing radiation curable resin, those usually used are used, but when using the cellulose-based resin such as TAC as described above as the transparent substrate film 12, ionizing radiation is used. Cellulose resins such as nitrocellulose, acetyl cellulose, cellulose acetate propionate, and ethyl hydroxyethyl cellulose are advantageous as solvent-drying resins to be included in the curable resin in terms of adhesion and transparency of the coating film.

The reason is that when toluene is used as a solvent for the above cellulose-based resin, the transparent base film 12 is made of toluene, which is a non-soluble solvent for polyacetyl cellulose, which is the transparent base film 12. Even when a coating containing this solvent-drying resin is applied, the adhesion between the transparent substrate film 12 and the coating film resin can be improved, and this toluene is a polyacetylcellulose which is a transparent substrate film. This is because the surface of the transparent base film 12 is not whitened and the transparency is maintained.

Furthermore, there is an advantage of including a solvent dry resin in the ionizing radiation curable resin composition as follows.

When the ionizing radiation curable resin composition is applied to the transparent base film 12 with a roll coater having a metalling roll, the liquid residual resin film on the surface of the metalling roll flows and becomes streaks, unevenness, etc. over time. Although defects such as streaks and unevenness occur on the coated surface, such coating film defects on the coated surface can be prevented by including a solvent-drying resin in the ionizing radiation curable resin composition as described above.

As a curing method of the ionizing radiation curable resin composition as described above, the ionizing radiation curable resin composition can be cured by a normal curing method, that is, irradiation with an electron beam or ultraviolet rays.

For example, in the case of electron beam curing, 50 to 1000 KeV emitted from various electron beam accelerators such as a Cockrowalton type, a bandegraph type, a resonant transformation type, an insulating core transformer type, a linear type, a dynamitron type, and a high frequency type. Preferably, an electron beam having an energy of 100 to 300 KeV is used, and in the case of ultraviolet curing, ultraviolet rays emitted from light such as an ultra-high pressure mercury lamp, a high-pressure mercury lamp, a low-pressure mercury lamp, a carbon arc, a xenon arc, and a metal halide lamp are used. it can.

As the first translucent fine particles 16 to be contained in the antiglare layer 18, plastic beads are suitable, and the transparency is particularly high, and the difference in refractive index from the matrix resin (translucent resin 14) is as described above. A numerical value is preferable.

The plastic beads used for the first light-transmitting fine particles 16 include melamine beads (refractive index 1.57), polycarbonate beads (refractive index 1.57), polyethylene beads (refractive index 1.50), polystyrene beads (1 .60), polyvinyl chloride beads (refractive index 1.60), and the like. As described above, the particle diameter of these plastic beads may be appropriately selected from 0.5 to 5 μm and contained in an amount of 5 to 30% by weight.

When the first light-transmitting fine particles 16 as the organic filler as described above are added, the organic filler easily settles in the resin composition (translucent resin 14). An inorganic filler may be added. As the amount of the inorganic filler added increases, the organic filler is more effective in preventing sedimentation of the organic filler, but adversely affects the transparency of the coating film. Therefore, it is preferable that an inorganic filler having a particle size of 0.5 μm or less is contained in an amount of less than 0.1% by weight so as not to impair the transparency of the coating film with respect to the translucent resin 14.

The second light transmissive fine particles 46 to be contained in the antiglare layer 18 are preferably plastic beads, particularly high in transparency, and having a refractive index difference from that of the matrix resin (light transmissive resin 14) as described above. A numerical value is preferable.

As the plastic beads used for the second translucent fine particles 46, acrylic beads (refractive index 1.49), acrylic-styrene beads (refractive index 1.54), and the like are used. The particle size of these plastic beads varies depending on the film thickness of the antiglare layer, and preferably a particle having a particle diameter of 0.1 to 0.3 μm larger than the film thickness of the antiglare layer is appropriately selected and used. It is good to contain ~ 20% by weight.

Here, in general, the ionizing radiation curable resin has a refractive index of around 1.5, which is about the same as that of glass. However, when the refractive index of the translucent fine particles is low, the translucent resin 14 is used. In addition, TiO ₂ (refractive index 2.3 to 2.7), Y ₂ O ₃ (refractive index 1.87), La ₂ O ₃ (refractive index 1.95), ZrO ₂ , which are fine particles having a high refractive index. (Refractive index 2.05), Al ₂ O ₃ (refractive index 1.63), etc. can be added to such an extent that the diffusibility of the coating film can be maintained, and the refractive index can be apparently adjusted.

The plastic beads used as the first and second light-transmitting fine particles should have a more uniform particle size in order to maintain the balance of the antiglare layer diffusion, antiglare and antireflection functions. Monodispersed organic fine particles are preferably used.

Next, the process of forming the antiglare layer 18 on the surface of the transparent substrate film 12 will be described.

A translucent resin 14 in which the first translucent fine particles 16 and the second translucent fine particles 46 are mixed is applied to the transparent base film 12, and the first translucent fine particles and the second translucent fine particles 46 are applied. Leave until the shape of the surface of the translucent resin with the light-sensitive fine particles is sufficiently formed, and then, when the translucent resin 14 is an electron beam or an ultraviolet curable resin, irradiate these electron beams or ultraviolet rays, In the case of a solvent-drying resin, it is cured by heating.

If it does in this way, the glare-proof layer 18 will be in a smooth state as a whole, the unevenness | corrugation by the 1st translucent fine particle is formed in the translucent resin surface, and 2nd translucency is formed from the translucent resin surface. An antiglare layer in which fine particles protrude from 0.1 to 0.3 μm is formed.

Next, the example of embodiment of the polarizing plate concerning this invention shown by FIG. 3 is demonstrated.

As shown in FIG. 3, the polarizing plate 20 of the example of this embodiment is provided with the same antiglare film 11 on one surface (upper surface side in FIG. 3) of the polarizing layer (polarizing element) 22. It is a configuration.

The polarizing layer 22 is laminated between TAC films 12A and 24, which are two transparent substrate films, and has a three-layer structure. The first layer and the third layer are made of polyvinyl alcohol (PVA) with iodine. In addition, the intermediate second layer is made of a PVA film.

The antiglare film 11 has a structure in which an antiglare layer 18 is laminated on a TAC film 12A.

The TAC provided on both outer sides of the polarizing layer 22 and serving as a transparent substrate has no birefringence and the polarization is not disturbed. Therefore, even when laminated with the PVA and PVA + iodine films serving as the polarizing elements, the polarization is not disturbed. Therefore, a liquid crystal display device with excellent display quality can be obtained using such a polarizing plate 20.

As a polarizing element constituting the polarizing layer 22 in the polarizing plate 20 as described above, a polyvinyl formal film, a polyvinyl acetal film, an ethylene-vinyl acetate copolymer system, a PVA film dyed with iodine or a dye and stretched. Film.

In addition, when laminating each film which comprises the polarizing layer 22, it is good to perform a saponification process to the said TAC film for the increase in adhesiveness and electrostatic prevention.

Next, an example of an embodiment in which the transmission type display device according to the present invention shown in FIG. 4 is a liquid crystal display device will be described.

A liquid crystal display device 30 shown in FIG. 4 includes a polarizing plate 32 similar to the polarizing plate 20, a liquid crystal panel 34, and a polarizing plate 36 in this order, and a backlight on the back side of the polarizing plate 36. This is a transparent liquid crystal display device in which 38 is disposed.

As the liquid crystal mode used in the liquid crystal panel 34 in the liquid crystal display device 30, any of twist nematic type (TN), super twist nematic type (STN), phase transition type (PC), polymer dispersion type (PDLC), etc. It may be.

The liquid crystal drive mode may be either a simple matrix type or an active matrix type. In the case of the active matrix type, a driving method such as TFT, MIM, etc. is adopted.

Further, the liquid crystal panel 34 may be either a color type or a monochrome type.

Since the present invention is configured as described above, even when the haze value is increased in the antiglare film, the transmission sharpness can be maintained relatively high, occurrence of glare can be prevented, and antireflection properties can also be obtained. Combined with excellent effects.

Examples of the present invention will be described below in comparison with comparative examples.

[Example 1] The translucent resin constituting the antiglare layer is 100 parts of an ultraviolet curable resin (Nippon Kayaku PETA, refractive index 1.51), triacetyl cellulose (Bayer, Ceridol CP, refraction). The ratio 2.22) is 1.7 parts by weight, the curing initiator (Ciba Geigy, Irgacure 184) is 5 parts by weight, and the first translucent fine particles are styrene beads (manufactured by Soken Chemical Co., Ltd., particle size 1. 3 μm, refractive index 1.60) is 5 parts by weight, and the second light transmitting fine particles are acrylic beads (manufactured by Soken Chemical Co., Ltd., particle size 3.5 μm, refractive index 1.49), 15 parts by weight. After coating with toluene to a solid content of 40% on a triacetyl cellulose film (manufactured by Fuji Film Co., Ltd., TD-80U) to a dry film thickness of 3.3 μm, solvent drying, Prevention by UV irradiation 140mJ The film was produced.

When the haze (cloudiness value) of the antiglare film was measured using HR-100 manufactured by Murakami Color Research Laboratory according to JIS-K-7105, it was 13%, which was an appropriate haze.

Moreover, when the transmission clarity of the anti-glare film was measured using Suga Test Instruments image clarity measuring device ICM-1DP according to JIS-K-7105, it was 61, and the favorable transmission clarity was shown.

Furthermore, when the spectral reflectance at 550 nm of the antiglare film was measured, it was 1.1%, indicating good antireflection properties.

When the polarizing plate formed using this antiglare film was observed on a 12.1 inch XGA liquid crystal panel, no scintillation was observed.

[Example 2] The translucent resin constituting the antiglare layer is 50 parts of UV curable resin (Nippon Kayaku PET30, refractive index 1.51), triacetyl cellulose (Bayer Co., Ceridol CP, refraction). Rate 2.22) is 1.7 parts by weight, UV curable resin (X-12-2400-3 manufactured by Shin-Etsu Chemical Co., Ltd.) is 25 parts by weight, and a curing initiator (Ciba Geigy, Irgacure 184) is 5 parts by weight. The first light-transmitting fine particles are 5 parts by weight of styrene beads (manufactured by Soken Chemical Co., Ltd., particle size 1.3 μm, refractive index 1.60), and the second light-transmitting fine particles are acrylic-styrene beads (Soken Chemical). Made of ZrO ₂ high refractive index ultrafine particle dispersion (No. 1140A manufactured by Sumitomo Osaka Cement Co., Ltd.) Adjust to 40% This was coated on a triacetyl cellulose film (manufactured by Fuji Film Co., Ltd., TD-80U) so as to have a dry film thickness of 4.8 μm, dried with a solvent, and then irradiated with ultraviolet rays of 140 mJ to produce an antiglare film. .

When various measurements of the antiglare film were carried out in the same manner as in Example 1, the haze (cloudiness value) was 10%, an appropriate haze was obtained, and the transmission clearness was 80, indicating good transmission sharpness. When the spectral reflectance at 550 nm of the film was measured, it was 1.0%, indicating good antireflection properties.

When the polarizing plate formed using this antiglare film was observed on a 12.1 inch XGA liquid crystal panel, no scintillation was observed.

[Comparative Example 1] Except that 3 parts by weight of aggregating silica (manufactured by Nippon Silica Co., Ltd., secondary particle size: 1.0 μm) is used as the first light-transmitting fine particles, and the second light-transmitting fine particles are not used Then, an antiglare film was produced in the same manner as in Example 1.

When various measurements were performed in the same manner as in Example 1, the haze (cloudiness value) of this antiglare film was 13%, the transmission clarity was 61, the light reflectance was 2.2%, and the haze and transmission clarity were Although it was good, the light reflectance was not good.

Further, scintillation was observed when scintillation was observed in the same manner as in Example 1.

[Comparative Example 2] As the first light-transmitting fine particles, 5 parts by weight of styrene beads (manufactured by Soken Chemical Co., Ltd., particle size 1.3 μm, refractive index 1.60) are used, and the second light-transmitting fine particles are not used. Except for the above, an antiglare film having a dry film thickness of 1.1 μm was produced in the same manner as in Example 1.

When various measurements were performed in the same manner as in Example 1, the haze (cloudiness value) of this antiglare film was 25%, the transmission clarity was 80, the light reflectance was 2.4%, and the transmission clarity was good. However, the values of haze and light reflectance were large and inappropriate.

Further, scintillation was observed when scintillation was observed in the same manner as in Example 1.

[Comparative Example 3] As the second light-transmitting fine particles, 20 parts by weight of acrylic beads (manufactured by Soken Chemical Co., Ltd., particle size 3.5 μm, refractive index 1.49) should be used, and the first light-transmitting fine particles should not be used. Except for the above, an antiglare film having a dry film thickness of 3.3 μm was produced in the same manner as in Example 1.

When various measurements were performed in the same manner as in Example 1, the anti-glare film had a haze (cloudiness value) of 6%, a transmission clarity of 130, and a light reflectance of 3.0%, and the haze and transmission clarity were Although it was good, the value of light reflectance was large and inappropriate.

Further, scintillation was observed when scintillation was observed in the same manner as in Example 1.

Since the present invention is configured as described above, even when the haze value is increased in the antiglare film, the transmission sharpness can be maintained relatively high, occurrence of glare can be prevented, and antireflection properties can also be obtained. Combined with excellent effects.

Sectional drawing which shows the anti-glare film which concerns on embodiment of this invention Enlarged view of the antiglare film Sectional drawing which shows the example of embodiment of the polarizing plate using the anti-glare film of this invention Sectional drawing which shows the example of embodiment of the transmission type display apparatus using the glare-proof film of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 11 ... Anti-glare film 12 ... Transparent base film 14 ... Translucent resin 16 ... 1st translucent fine particle 46 ... 2nd translucent fine particle 18 ... Anti-glare layer 20, 32, 36 ... Polarizing plate 22 ... Polarizing layer 30 ... Liquid crystal display device 34 ... Liquid crystal panel

Claims (7)

At least a transparent substrate film and an antiglare layer containing at least a first light-transmitting fine particle and a second light-transmitting fine particle having different refractive indexes in a light-transmitting resin are laminated,
It said first light-transmitting particulate is larger than the refractive index of the second translucent particles, and 0.04 to 0.20 much larger than the refractive index of the translucent resin,
The antiglare film, wherein the first light-transmitting fine particles and the second light-transmitting fine particles are both monodispersed organic fine particles . The antiglare film according to claim 1, wherein the first light-transmitting fine particles are styrene beads, and the second light-transmitting fine particles are acrylic beads or acrylic-styrene beads. The antiglare film according to claim 1 or 2, wherein the particle size of the second translucent fine particles is larger than the film thickness of the antiglare layer. The second light-transmitting fine particles protrude from the surface of the antiglare layer by 0.1 to 0.3 μm, and the refractive index difference from the light-transmitting resin is 0.3 or less. 2. The antiglare film as described in 2 or 3. The antiglare film according to claim 1, 2, 3, or 4, wherein the first light-transmitting fine particles have a particle size of 0.5 to 2.0 µm. A polarizing element and the antiglare film according to claim 1, wherein the polarizing element is laminated on the surface of the polarizing element with a surface opposite to the antiglare layer in the transparent base film. A polarizing plate characterized by comprising: The planar light-transmitting display body, a light source device that irradiates the light-transmitting display body from the back, and the light-transmitting display body are stacked on the surface of the light-transmitting display body. A transmissive display device comprising an antiglare film.

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