JP2002221610A - Glare-proof film, polarizing plate and transmission display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent surface dazzling and to reduce reflection while maintaining high clear transmission in a glare-proof film. SOLUTION: The glare-proof film 10 is obtained by stacking a transparent substrate film 12 and a glare-proof layer 18 and this glare-proof layer 18 is formed by blending a light transmissive resin 14 with first light transmissive fine particles having 0.5-2.0 μm particle diameter and a refractive index different from that of the light transmissive resin by 0.04-0.20 and second light transmissive fine particles having a refractive index different from that of the light transmissive resin by <=0.3 and projecting from the surface of the glare-proof layer by 0.1-0.3 μm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In such a display, if light emitted mainly from the inside goes straight without diffusing on the display surface, the light emitted from the inside is diffused to some extent because it is dazzling when the display surface is visually observed. Is provided on the display surface.

This anti-glare film is disclosed in, for example,
As disclosed in JP-A-8706 and JP-A-10-20103, a transparent substrate film is formed by applying a resin containing a filler such as silicon dioxide (silica) to the surface thereof.

[0004] These antiglare films are of a type in which irregularities are 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 thickness of the coating film is added to the resin. There is a type in which an uneven shape is formed on the surface of the layer, and a type in which a film having unevenness is laminated on the surface of the layer to transfer the uneven shape.

[0005]

In any of the above conventional anti-glare films, light diffusion and anti-glare effects are obtained by the action of the surface shape of the anti-glare layer. In order to enhance the properties, it is necessary to increase the irregularities. However, when the irregularities increase, the haze value (haze value) of the coating film increases, and accordingly, there is a problem that the transmission clearness decreases.

Further, the above-mentioned conventional type of antiglare film has a problem that a so-called scintillation glittering is generated on the surface of the film, and the visibility of the display screen is reduced.

[0007] In order to solve the above problems, the present inventors have
Japanese Patent Application No. 10-1 has developed an anti-glare film capable of improving transmission clarity and reducing scintillation without lowering diffusion and anti-glare properties.
No. 25494. However, it does not have anti-reflection properties as well as diffusion and anti-glare properties.

As a method for imparting antireflection properties, a method of applying an antireflection paint to glass or plastic surface,
On a surface of a transparent substrate such as glass,
A method of providing an ultra-thin film such as F ₂ or a metal vapor-deposited film, a method of coating an ionizing radiation-curable resin on a plastic surface such as a plastic lens, and forming a film of SiO ₂ or MgF ₂ thereon by vapor deposition, ionizing radiation There is known a method of forming a coating film having a low refractive index on a cured film of a curable resin.

However, in an antiglare film,
Due to the effect of the surface irregularities, light diffusion and anti-glare effects are obtained, so that the surface cannot be coated as described above, and has anti-reflection properties as well as diffusion and anti-glare properties. There was a problem that it could not be done.

The present invention has been made in view of the above-mentioned conventional problems, and has been made to improve transmission clearness and reduce scintillation without lowering diffusion and antiglare properties. Another object of the present invention is to provide an anti-glare film having anti-reflection properties, a polarizing plate using the anti-glare film, and a transmission type display device.

[0011]

Means for Solving the Problems According to the present invention, at least a transparent base film and a first transparent fine particle and a second transparent fine particle in a transparent resin are provided. The first light-transmitting fine particles have a particle diameter of 0.5 to 2.0, and have a difference in refractive index between the light-transmitting resin and the first light-transmitting fine particles of 0 to 2.0. 0.04 to 0.20, and the second light-transmitting fine particles have a difference in refractive index from the light-transmitting resin of 0.3.
Or less, and 0.1 to 0.1 from the surface of the antiglare layer.
The above object is achieved by an anti-glare film characterized in that it protrudes by 3 μm.

[0012] The first light-transmitting fine particles and the second light-transmitting fine particles may be monodisperse organic fine particles.

The light-transmitting resin may be an ionizing radiation-curable resin.

Furthermore, the transparent substrate may be a triacetyl cellulose film.

[0015] The invention relating to the polarizing plate is as follows.
By providing a polarizing element and the above-described anti-glare film laminated on the surface of the polarizing element with the surface on the side opposite to the anti-glare layer of the transparent substrate facing the above, the above object is achieved. Is to achieve.

Further, the invention of a transmission type display device is described in claim 6.
Like, a flat light-transmitting display, a light source device for irradiating the light-transmitting display from the back, and the above-described anti-glare film laminated on the surface of the light-transmitting display, The above-mentioned object is achieved by configuring a transmission type display device having the following.

[0017]

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

An anti-glare film 10 according to an embodiment of the present invention, as shown in FIG.
2 and an anti-glare layer 18 including the first light-transmitting fine particles 16 and the second light-transmitting fine particles 46 in the light-transmitting resin 14, and the first light-transmitting fine particles 16 Has a particle size of 0.5 to
2.0 μm, and the difference in refractive index from the translucent resin is 0.04 to 0.20, and the second translucent fine particles 4
No. 6 has a refractive index difference of 0.3 or less from the translucent resin.
Further, the second light-transmitting fine particles protrude from the surface of the anti-glare layer.

FIG. 2 is an enlarged view of a part of FIG.
The second light-transmitting fine particles protrude by d from the surface of the antiglare layer, and the value of d is 0.1 to 0.3 as described above.
μm. Further, the first light-transmitting fine particles 16 are contained in the entire anti-glare layer 18, and some of the first light-transmitting fine particles 16 protrude from the surface of the anti-glare layer.

In the structure of the anti-glare film 10, the first light-transmitting fine particles 16 mainly contribute to diffusion and scintillation prevention, and the second light-transmitting fine particles 46 mainly have anti-glare properties and anti-reflection properties. Has contributed.

The transparent substrate 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 substrate film 12. Rate 1.5
1), the first light-transmitting fine particles 16 are made of a light-transmitting resin, for example, styrene beads (refractive index: 1.60), and the second light-transmitting fine particles 46 are made of a light-transmitting resin. ,
For example, it is made of acrylic beads (refractive index: 1.49).

The reason why the difference in the refractive index between the first light-transmitting fine particles 16 and the light-transmitting resin 14 is 0.04 or more is that the difference in the refractive index is 0.04 from the viewpoint of the antiglare property. If the refractive index difference is less than 0.2, the difference in refractive index between the two is too small to obtain the light diffusing effect, and if the difference in refractive index is larger than 0.2, the light diffusing property is too high, and the entire film becomes white. It is because it becomes. The difference between the refractive indices 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 described later.

The particle size of the first light-transmitting fine particles 16 is set to 0.1.
The reason for setting the thickness to 5 μm or more is that if the thickness is less than 0.5 μm, the light diffusion effect cannot be obtained unless the amount of the first light-transmitting fine particles 16 to be added to the light-transmitting resin 14 is extremely large. . Further, the particle size of the first light-transmitting fine particles 16 is set to 2.0 μm.
This is because when the particle size exceeds 2.0 μm, the surface shape of the antiglare layer 18 becomes coarse and the haze value increases. Note that, ideally, the diameter of the first light-transmitting fine particles 16 is 1 μm or more and 2 μm or less.

As described above, the first filler as the filler
Due to the slight difference in the refractive index between the light-transmitting fine particles 16 and the light-transmitting resin 14, the entire film does not whiten, and while maintaining high transmission clarity, the inside of the anti-glare film 10 is diffused by the diffusion effect. The transmitted light can be averaged.

For this reason, even when the haze value of the film is high, it is possible to prevent glare on the surface without lowering the transmission sharpness. Further, it is possible to prevent surface scintillation (scintillation) while maintaining high transmission definition.

The second light-transmitting fine particles 46 have a difference in refractive index from the light-transmitting resin of 0.3 or less and protrude from the surface of the antiglare layer by 0.1 to 0.3 μm. The reason for the formation is that the thickness is not clear, but the thickness is such that optical interference occurs at the protruding portion.

For example, the anti-reflection film reduces the reflection of light by 100%.
The conditions for preventing light and transmitting 100% of the light are as follows: when the incident light is perpendicularly incident on the thin film, the specific wavelength is λ ₀ , the refractive index of the anti-reflection layer for this wavelength is n ₀ , It is known that if the thickness is h and the refractive index of the substrate is ng, it is necessary to satisfy the following equations (1) and (2) (Science library physics = 9).
"Optics", pp. 70-72, published by Science Corporation in 1980.

[0028] _{n 0 = √ng ... (1)} n 0 h = λ 0/4 ... (2)

That is, when the refractive index is larger than 1, ng> n ₀ always holds. Therefore, assuming that an antireflection layer is formed on the surface of the antiglare layer, the refractive index n ₀ of the antireflection layer is
It must be smaller than the refractive index ng of the antiglare layer.

For example, when a material having a refractive index n ₀ = 1.49 is used for the antireflection layer, the wavelength λ ₀ = 550 n of the incident light
m, the thickness h of the antireflection film is obtained from the above equation (2).
It is calculated that about 0.1 μm is optimal.

In the present invention, the second light-transmitting fine particles 4 having a difference in refractive index from the light-transmitting resin of 0.3 or less.
6 is formed so as to protrude from the surface of the anti-glare layer by 0.1 to 0.3 μm, and a film having a lower refractive index than the anti-glare layer is formed on the surface of the anti-glare layer with an appropriate thickness. Is artificially configured, and as a result, optical interference occurs in the protruding portion, and a simple antireflection effect can be exhibited.

The second light-transmitting fine particles 46 may have a difference in refractive index from the light-transmitting resin of more than 0.3, or may project less than 0.1 μm from the surface of the anti-glare layer. ,
If the protrusion is larger than 0.3 μm, the optical interference effect decreases, and sufficient antireflection properties cannot be obtained.

Further, since the second light-transmitting fine particles 46 are formed so as to protrude from the surface of the anti-glare layer by 0.1 to 0.3 μm, fine irregularities are formed on the surface, A conventionally known anti-glare effect is produced.

The material of the transparent substrate film 12 includes a transparent resin film, a transparent resin plate, a transparent resin sheet and a transparent glass.

As the transparent resin film, triacetyl cellulose (TAC) film, polyethylene terephthalate (PET) film, diacetylene cellulose film, acetate butyrate cellulose film, polyether sulfone film, polyacrylic resin film, polyurethane resin Films, polyester films, polycarbonate films, polysulfone films, polyether films, polymethylpentene films, polyetherketone films, (meth) acrylonitrile films and the like can be used. The thickness is usually 25μ.
m to about 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).
Further, a liquid crystal display device having excellent display quality can be obtained by using the polarizing plate, which is particularly preferable.

When the anti-glare layer 18 is applied by various coating methods, from the viewpoint of heat resistance, solvent resistance and workability such as mechanical strength, the transparent substrate film 12 is made of P
ET is particularly desirable.

The translucent resin 14 forming the antiglare layer 18
As the resin, three types of resins mainly cured by ultraviolet rays and electron beams, that is, ionizing radiation-curable resins, mixtures of ionizing radiation-curable resins with thermoplastic resins and solvents, and thermosetting resins are used. The thickness is usually 0.5 μm to 5 μm.
The thickness is about 0 μm, preferably 1 μm to 20 μm, and more preferably 2 μm to 10 μm.

The film-forming component of the ionizing radiation-curable resin composition is preferably one having an acrylate-based functional group, for example, a polyester resin, polyether resin, acrylic resin, epoxy resin, urethane resin having a relatively low molecular weight, (Meth) acrylates of polyfunctional compounds such as alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, and polyhydric alcohols (herein, acrylate and methacrylate are referred to as (meth) acrylate). Of an ionizing radiation-curable resin containing a relatively large amount of an oligomer or a prepolymer and a reactive diluent. Examples of the diluent include ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, vinyl toluene, N
Monofunctional monomers such as vinylpyrrolidone, as well as 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
Examples include hexanediol di (meth) acrylate and neopentyl glycol di (meth) acrylate.

Further, when the above-mentioned ionizing radiation-curable resin is used as an ultraviolet-curable resin, acetophenones, benzophenones, Michler benzoyl benzoate, α-amyloxime ester, and the like may be used as a photopolymerization initiator. Thioxanthones and n- as photosensitizers
Butylamine, triethylamine, tri-n-butylphosphine and the like can be mixed and used. In particular, in the present invention, it is preferable to mix urethane acrylate as an oligomer and dipentaerythritol hexa (meth) acrylate as a monomer.

Further, as the light-transmitting resin 14 for forming the antiglare layer 18, a solvent-drying resin may be added to the ionizing radiation-curable resin as described above. The solvent-drying type resin mainly includes a thermoplastic resin such as a senol resin, a urea resin, a diallyl phthalate resin, a melamine resin, a guanamine resin, an unsaturated polyester resin, a polyurethane resin, an epoxy resin, an aminoalkyd resin, and a melamine-urea resin. Condensed resins, silicon resins, polysiloxane resins and the like are used.

As the type of the solvent-dried thermoplastic resin to be added to the ionizing radiation-curable resin, those commonly used are used.
When a cellulosic resin such as AC is used, the solvent-drying resin to be included in the ionizing radiation-curable resin may be a cellulose resin such as nitrocellulose, acetylcellulose, cellulose acetate propionate, or ethylhydroxyethylcellulose. This is advantageous in terms of transparency and transparency.

The reason is that when toluene is used as a solvent for the above-mentioned cellulose resin, the transparent substrate film 1
Despite the use of toluene, which is a solvent insoluble in polyacetylcellulose 2, the transparent substrate film 1
Even if the coating containing the solvent-drying type resin is applied to 2,
The adhesion between the transparent substrate film 12 and the coating resin can be improved, and the toluene does not dissolve the transparent substrate film, polyacetylcellulose. This is because there is an advantage that the transparency is maintained without performing.

Further, as described below, there is an advantage that the ionizing radiation-curable resin composition contains a solvent-drying resin.

When the ionizing radiation-curable resin composition is applied to the transparent substrate film 12 by a roll coater having a metalling roll, the liquid residual resin film on the surface of the metalling roll flows and becomes streaked or uneven over time. These cause defects such as streaks and unevenness on the coated surface, but when the ionizing radiation-curable resin composition contains a solvent-dried resin as described above, it is possible to prevent such coating film defects on the coated surface. it can.

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

For example, in the case of electron beam curing, the electron beam is emitted from various electron beam accelerators such as Cockrow-Walton type, Bande graph type, Resonant transformer type, Insulating core transformer type, Linear type, Dynamitron type, High frequency type and the like. 50 to 1000 KeV,
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 beams 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 can be used. .

The first light-transmitting fine particles 16 contained in the antiglare layer 18 are preferably plastic beads, and particularly have high transparency, and have a difference in refractive index from the matrix resin (light-transmitting resin 14). It is preferable that a numerical value such as

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 are used. The particle size of these plastic beads may be appropriately selected from 0.5 to 5 μm as described above, and may be contained at 5 to 30% by weight.

When the first light-transmitting fine particles 16 as an organic filler as described above are added, the organic filler is liable to settle in the resin composition (light-transmitting resin 14). May be added with an inorganic filler such as silica. In addition, as the amount of the inorganic filler increases, the inorganic 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 the inorganic filler having a particle size of 0.5 μm or less be contained in the translucent resin 14 in an amount of less than 0.1% by weight so as not to impair the transparency of the coating film.

As the second translucent fine particles 46 to be contained in the antiglare layer 18, plastic beads are suitable, and particularly the transparency is high, and the difference in refractive index from the matrix resin (translucent resin 14) is as described above. It is preferable that a numerical value such as

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)
Are used. The particle size of these plastic beads differs depending on the thickness of the anti-glare layer. Preferably, a particle having a particle size of 0.1 to 0.3 μm larger than the thickness of the anti-glare layer is appropriately selected and used. It is preferable to contain -20% by weight.

Here, the refractive index of the ionizing radiation-curable resin is generally about 1.5, which is about the same as that of glass.
When the refractive index of the light-transmitting fine particles is low, TiO ₂ (refractive index: 2.3 to 2.7), Y ₂ O ₃ (refractive index), which are fine particles having a high refractive index, are added to the light-transmitting resin 14. Rate 1.87), La
₂ O ₃ (refractive index 1.95), ZrO ₂ (refractive index 2.0
5) Addition of Al ₂ O ₃ (refractive index: 1.63) or the like to such an extent that the diffusivity of the coating film can be maintained, and the apparent refractive index can be adjusted.

The plastic beads used as the first and second light-transmitting fine particles have a uniform particle size so that the functions of diffusion, anti-glare and anti-reflection of the anti-glare layer can be maintained in a balanced manner. And monodispersed organic fine particles are preferably used.

Next, on the surface of the transparent substrate film 12,
The process of forming the anti-glare layer 18 will be described.

The transparent base film 12 is coated with the light-transmitting resin 14 in which the first light-transmitting fine particles 16 and the second light-transmitting fine particles 46 are mixed. 2 until the shape of the light-transmitting resin surface formed by the light-transmitting fine particles is sufficiently formed. Then, when the light-transmitting resin 14 is an electron beam or an ultraviolet-curable resin, these electron beams or ultraviolet rays are applied. Irradiation and, in the case of a solvent drying type resin, curing by heating.

By doing so, the anti-glare layer 18 is brought into a smooth state as a whole, irregularities due to the first light-transmitting fine particles are formed on the light-transmitting resin surface, and the second light-transmitting resin surface has The anti-glare layer in which the light-transmitting fine particles protrude by 0.1 to 0.3 μm is formed.

Next, an embodiment of the polarizing plate according to the present invention shown in FIG. 3 will be described.

As shown in FIG. 3, a polarizing plate 20 according to this embodiment includes a polarizing layer (polarizing element) 22 on one surface (upper side in FIG. 3) of the same anti-glare film 1 as described above.
1 is provided.

The polarizing layer 22 is laminated between two layers of TAC films 12A and 24, which are transparent base films, and has a three-layer structure. The first and third layers are formed of polyvinyl alcohol (PVA). ) With iodine,
The intermediate second layer consists of a PVA film.

The anti-glare film 11 is a TAC film 1
This is a configuration in which an antiglare layer 18 is laminated on 2A.

The TAC, which is provided on both outer sides of the polarizing layer 22 and serves as a transparent substrate, has no birefringence and does not disturb the polarized light. . Therefore, a liquid crystal display device having excellent display quality can be obtained by using such a polarizing plate 20.

The polarizing layer 2 in the polarizing plate 20 as described above
Examples of the polarizing element constituting 2 include a PVA film dyed and stretched with iodine or a dye, a polyvinyl formal film, a polyvinyl acetal film, a saponified ethylene-vinyl acetate copolymer film, and the like.

In laminating the films constituting the polarizing layer 22, it is preferable to perform a saponification treatment on the TAC film in order to increase adhesion and prevent static electricity.

Next, an example of an embodiment in which the liquid crystal display is used as the transmissive display according to the present invention shown in FIG. 4 will be described.

The liquid crystal display device 30 shown in FIG. 4 includes a polarizing plate 32 similar to the above-described polarizing plate 20, a liquid crystal panel 34,
The polarizing plate 36 and the polarizing plate 36 are stacked in this order, and the polarizing plate 36
This is a transparent liquid crystal display device in which a backlight 38 is arranged on the back surface on the side.

The liquid crystal modes used in the liquid crystal panel 34 of the liquid crystal display device 30 include a twisted nematic type (TN), a super twisted nematic type (STN), a phase transition type (PC), and a polymer dispersed type (PDLC). And so on.

The driving mode of the liquid crystal 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 or MIM is employed.

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

[0070]

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

Example 1 The translucent resin constituting the antiglare layer was 100 parts of an ultraviolet curable resin (Nippon Kayaku PETA, refractive index 1.51), and triacetyl cellulose (Ceridol, manufactured by Bayer AG). CP, 2.22) 1.7
5 parts by weight of a curing initiator (Irgacure 184, manufactured by Ciba-Geigy), and the first light-transmitting fine particles were styrene beads (manufactured by Soken Chemical, particle size: 1.3 μm, refractive index: 1.60). 5 parts by weight, the second light-transmitting fine particles were made of acrylic beads (manufactured by Soken Chemical Co., Ltd., particle size 3.5 μm, refractive index 1.4).
9), 15 parts by weight thereof, and a mixture prepared by mixing them to obtain a solid content of 40% with toluene, was mixed with a triacetyl cellulose film (TD-80, manufactured by Fuji Film Co., Ltd.).
U) On top of this, coating was performed so as to have a dry film thickness of 3.3 μm, and after drying with a solvent, ultraviolet rays were irradiated at 140 mJ to produce an antiglare film.

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.

When the transmission clarity of the antiglare film was measured using an image clarity measuring device ICM-1DP manufactured by Suga Test Instruments in accordance with JIS-K-7105, it was 61, indicating good transmission clarity.

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

When a polarizing plate formed using this antiglare film was adhered to a 12.1-inch size XGA liquid crystal panel and observed, no scintillation (facets) occurred.

Example 2 The translucent resin constituting the anti-glare layer was 50 parts of an ultraviolet curable resin (Nippon Kayaku PET30, refractive index 1.51), triacetyl cellulose (manufactured by Bayer Corp., Celidol). 1.7 parts by weight of a CP, a refractive index of 2.22, and an ultraviolet curable resin (X-12-2 manufactured by Shin-Etsu Chemical Co., Ltd.)
400-3), 5 parts by weight of a curing initiator (Irgacure 184, manufactured by Ciba-Geigy), and the first light-transmitting fine particles were styrene beads (manufactured by Soken Chemical Co., Ltd., particle size: 1.3).
μm, refractive index 1.60) of 5 parts by weight, and the second light-transmitting fine particles were acrylic-styrene beads (manufactured by Soken Chemical Co., Ltd., particle size 5).
5.0 μm, refractive index 1.54) is 12 parts by weight, and these are mixed well with a ZrO ₂ high refractive index ultrafine particle dispersion (No. 1140A manufactured by Sumitomo Osaka Cement Co.), and the solid content becomes 40% with toluene. What was adjusted as described above, a triacetyl cellulose film (manufactured by Fuji Film Company, TD-8)
0U), a coating was applied to a dry film thickness of 4.8 μm, and after drying with a solvent, ultraviolet rays were irradiated at 140 mJ to produce an antiglare film.

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

When a polarizing plate formed using this antiglare film was adhered to a 12.1 inch-size XGA liquid crystal panel and observed, no scintillation (face-to-face) occurred.

[Comparative Example 1] As the first light-transmitting fine particles,
Cohesive silica (Nippon Silica Co., secondary particle size 1.0 μm)
Was used in the same manner as in Example 1 except that 3 parts by weight was used and the second translucent fine particles were not used.

Various measurements were carried out in the same manner as in Example 1. As a result, the haze (haze value) of this antiglare film was 13%, the transmission clearness was 61, and the light reflectance was 2.2%.
The transmission clarity was good, but the light reflectance was not good.

When the scintillation was observed in the same manner as in Example 1, scintillation occurred.

Comparative Example 2 As the first light-transmitting fine particles,
Except for using 5 parts by weight of styrene beads (manufactured by Soken Chemical Co., Ltd., particle size 1.3 μm, refractive index 1.60) and using no second light-transmitting fine particles, the dry film thickness was 1. 1μ
m was prepared.

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

When the scintillation was observed in the same manner as in Example 1, scintillation occurred.

Comparative Example 3 The second light-transmitting fine particles were acrylic beads (manufactured by Soken Chemical Co., Ltd., particle size 3.5 μm, refractive index 1.
49) was used in the same manner as in Example 1 except that 20 parts by weight of the compound was used and the first light-transmitting fine particles were not used.
Was produced.

Various measurements were carried out in the same manner as in Example 1. As a result, the antiglare film had a haze (cloudiness value) of 6%, a transmission clearness of 130, and a light reflectance of 3.0%.
Although the transmission clearness was good, the value of the light reflectance was large and inappropriate.

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

[0088]

The present invention is configured as described above.
Even when the haze value is increased in the anti-glare film, the transmission sharpness can be maintained relatively high, the occurrence of surface glazing can be prevented, and an excellent effect having anti-reflection properties can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an antiglare film according to an embodiment of the present invention.

FIG. 2 is an enlarged view of the anti-glare film.

FIG. 3 is a cross-sectional view showing an example of an embodiment of a polarizing plate using the antiglare film of the present invention.

FIG. 4 is a sectional view showing an example of an embodiment of a transmission type display device using the antiglare film of the present invention.

[Explanation of symbols]

 10, 11: Anti-glare film 12: Transparent base film 14: Translucent resin 16: First translucent fine particles 46: Second translucent fine particles 18: Anti-glare layer 20, 32, 36 ... Polarizing plate Reference numeral 22: polarizing layer 30: liquid crystal display device 34: liquid crystal panel

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G02F 1/1335 G02F 1/1335 5G435 510 510 G09F 9/00 313 G09F 9/00 313 // C08L 1:12 C08L 1:12 F term (reference) 2H042 BA02 BA12 BA20 2H049 BA02 BA25 BA27 BB49 BB63 BC03 BC22 2H091 FA08X FA08Z FA31X FA31Z FA37X FB02 FB12 FB13 FD06 LA16 LA19 4F006 AA02 AA12 AA34 AB16 AB18 AB16 AB AB74 AB76 BA14 CA00 CA05 DA04 DA05 4F100 AJ06A AK01B AK25 AT00A BA02 CA13B CA13H CA30 DD07B DE01B DE04B EH46 EJ54 GB41 JB14B JN01A JN01B JN18B JN30 YY00B 5G435 AA02 FF05 FF06 HH04

Claims (7)

[Claims] 1. A laminate comprising at least a transparent substrate film and an antiglare layer containing at least one kind of light-transmitting fine particles in a light-transmitting resin, wherein the light-transmitting fine particles are An anti-glare film, wherein the difference in refractive index from the resin is 0.3 or less, and the anti-glare film protrudes from the surface of the anti-glare layer by 0.1 to 0.3 μm. 2. An anti-glare layer comprising at least a transparent base film and an anti-glare layer containing first light-transmitting fine particles and second light-transmitting fine particles in a light-transmitting resin, The light-transmitting fine particles have a particle size of 0.5 to 2.0 μm, and a difference in refractive index from the light-transmitting resin is 0.04 to 0.20,
The second light-transmitting fine particles have a difference in refractive index from the light-transmitting resin of 0.3 or less, and project from the surface of the anti-glare layer by 0.1 to 0.3 μm. Characteristic anti-glare film. 3. The antiglare film according to claim 1, wherein the light-transmitting fine particles are monodispersed organic fine particles. 4. The antiglare film according to claim 1, wherein the light-transmitting resin is an ionizing radiation-curable resin. 5. The anti-glare film according to claim 1, wherein the transparent substrate is a triacetyl cellulose film. 6. A polarizing element, and the anti-glare film according to claim 1, which is laminated on a surface of the polarizing element with a surface of the transparent substrate opposite to the anti-glare layer. Polarizing plate provided. 7. A flat light-transmitting display, a light source device for irradiating the light-transmitting display from the back, and a light-emitting device laminated on the surface of the light-transmitting display. A transmissive display device comprising: