JP2011186066A - Antiglare film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antiglare film which is capable of suppressing glare and the reduction of contrast at the same time while having high antiglare properties. <P>SOLUTION: The antiglare film has an irregular projection and recess structure provided on a transparent film and has a haze value (H) of ≤1.2% and has an average wavelength (Sλa) of the projection and recess structure of 5 to 300 μm and satisfies formula (1) 0.0006(Sλa)<(SRa)<0.0006(Sλa)+0.12 wherein Sλa is a center surface average roughness of the projection and recess structure. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an antiglare film.

In various image display devices such as a liquid crystal display device (LCD) and a plasma display panel (PDP), light incident from the outside is reflected on the screen, and a phenomenon that makes it difficult to view a display image due to the reflection of an image occurs. appear.
In particular, with the increase in size of image display devices, it has become increasingly important to solve the above problems.

On the other hand, techniques for forming anti-glare properties by forming fine irregularities by sandblasting, embossing, coating of a coating film containing fine particles, and the like are conventionally known.
As a technique for imparting such anti-glare properties, there is a method of sticking an anti-glare film on the surface of a display, in addition to a method of forming irregularities on the surface of the display device itself, on the surface of a transparent film. is there.

  The factor that exerts the anti-glare effect is basically derived from the surface irregularity shape. However, since the irregularity is formed on the surface in this way, the resolution and contrast of the screen may be lowered. Various studies have been made in the past in consideration of inconvenience.

For example, Patent Document 1 proposes an antiglare film that defines the total light transmittance, haze, and glossiness in addition to the surface centerline average roughness and the surface irregularity pitch.
Further, Patent Document 2 proposes an antiglare film that defines a relational expression of an aperture ratio of a black matrix, a haze, and a pitch between surface irregularities.

JP 2004-341553 A JP 2009-265500 A

  In the conventional anti-glare film, as disclosed in Patent Documents 1 and 2 described above, if the haze value is low, glare is likely to occur, and thus a haze value of a certain level or more is required.

  However, on the other hand, a high haze value means that the transparency of the film itself is low, so the resolution and contrast of the screen inevitably decrease, and the screen itself appears whitish, that is, white blur occurs. It becomes easy.

  Accordingly, an object of the present invention is to provide an antiglare film that has high antiglare properties and at the same time, is also capable of suppressing glare and reduction in contrast.

  As a result of intensive studies to solve the above problems, the present inventors have provided a non-uniform uneven structure on a transparent film, and have a haze value, an average wavelength of the uneven structure, and the average wavelength. By defining the relationship with the center surface average roughness, it has been found that while having high antiglare properties, at the same time, suppression of glare and reduction in contrast can be achieved, and the present invention has been completed. That is, the present invention is as follows.

[1]
It has a non-uniform uneven structure provided on a transparent film,
The haze value (H) is 1.2% or less,
An average wavelength (Sλa) of the concavo-convex structure is 5 to 300 μm;
The antiglare film in which the average wavelength (Sλa) and the center surface average roughness (SRa) of the uneven structure satisfy the following formula (1).
0.0006 (Sλa) <(SRa) <0.0006 (Sλa) +0.12 (1)

[2]
The antiglare film according to [1], wherein the uneven uneven structure is formed by interference exposure.

[3]
The antiglare film according to [1] or [2], wherein the material of the transparent film is triacetylcellulose.

  ADVANTAGE OF THE INVENTION According to this invention, it has high anti-glare property, glare suppression, and suppression of contrast fall, and the anti-glare film which can improve image quality is obtained by applying to a display.

It is the chart of the surface shape which measured the anti-glare film of Example 1 with the surface roughness measuring machine. The magnification in each direction is (Y-axis direction magnification) / (X-axis direction magnification) = 1, (Z-axis direction magnification) / (X-axis direction magnification) = 200. It is the chart of the surface shape which measured the anti-glare film of Example 2 with the surface roughness measuring machine. The magnification in each direction is (Y-axis direction magnification) / (X-axis direction magnification) = 1, (Z-axis direction magnification) / (X-axis direction magnification) = 200. It is the chart of the surface shape which measured the anti-glare film of Example 3 with the surface roughness measuring machine. The magnification in each direction is (Y-axis direction magnification) / (X-axis direction magnification) = 1, (Z-axis direction magnification) / (X-axis direction magnification) = 80. It is a chart of the surface shape which measured the anti-glare film of comparative example 1 with the surface roughness measuring machine. The magnification in each direction is (Y-axis direction magnification) / (X-axis direction magnification) = 1, (Z-axis direction magnification) / (X-axis direction magnification) = 100. It is a chart of the surface shape which measured the anti-glare film of comparative example 2 with the surface roughness measuring machine. The magnification in each direction is (Y-axis direction magnification) / (X-axis direction magnification) = 1, (Z-axis direction magnification) / (X-axis direction magnification) = 40. It is a chart of the surface shape which measured the anti-glare film of comparative example 3 with the surface roughness measuring machine. The magnification in each direction is (Y-axis direction magnification) / (X-axis direction magnification) = 1, (Z-axis direction magnification) / (X-axis direction magnification) = 50.

  Hereinafter, a mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail. In addition, this invention is not restrict | limited to the following embodiment, A various deformation | transformation can be implemented within the range of the summary.

[Anti-glare film]
The antiglare film of this embodiment has a non-uniform uneven structure provided on a transparent film,
The haze value (H) is 1.2% or less,
An average wavelength (Sλa) of the concavo-convex structure is 5 to 300 μm;
The average wavelength (Sλa) and the center plane average roughness (SRa) of the concavo-convex structure are antiglare films satisfying the following formula (1).
0.0006 (Sλa) <(SRa) <0.0006 (Sλa) +0.12 (1)

The antiglare film of this embodiment has a non-uniform uneven structure on a transparent film.
Examples of the transparent film used for the antiglare film include cellulose acetate films such as polyethylene film, polypropylene film, triacetylcellulose, and cellulose acetate propionate; polyester films such as stretched polyethylene terephthalate and polyethylene naphthalate Examples of the film include polycarbonate film, norbornene film, polysulfone film, polyethersulfone film, and polyarylate film.
From the viewpoint of using transmitted light, the transparent film preferably has a haze of 1.0% or less in a state before imparting an uneven structure to the surface.
Among the transparent films, a cellulose triacetate film is preferably used in terms of optical properties such as haze, reflectance, light transmittance, and image clarity.
The thickness of the transparent film is not particularly limited, but is preferably in the range of 10 to 500 μm, more preferably in the range of 20 to 300 μm, for example, from the viewpoints of workability such as strength and handleability and thin layer properties. Preferably it is the range of 30-200 micrometers.
Although the refractive index of the said transparent film base material is not restrict | limited in particular, For example, the range of 1.30-1.80 is preferable, More preferably, it is the range of 1.40-1.70.

A non-uniform uneven structure is formed on the transparent film.
The uneven concavo-convex structure means that irregularly shaped protrusions are irregularly arranged. Such a shape can be formed by sandblasting the surface of the transparent film, applying a resin containing fine particles, pressing a heated mold against the film, and copying the concavo-convex structure by the pressure, etc. is there.
Moreover, it can form also by laminating | stacking the resin layer which has uneven | corrugated shape on a transparent film.

About the uneven uneven structure, from the viewpoint that the shape and the optical characteristics accompanying it can be precisely controlled, an irregular uneven structure derived from a speckle pattern by interference exposure is used as a mold, and this is used for the transparent film. A method of shaping on the surface is preferably used.
A method for manufacturing the uneven shape by the interference exposure method will be described later.

The antiglare film of this embodiment has a haze value (H) of 1.2% or less.
By reducing the haze value, the transparency becomes good, and the sharpness and contrast of the screen can be maintained high.
The preferred haze value is 1.0% or less, more preferably 0.9% or less, and more preferably 0.5% or less.
Moreover, if a haze value is 0.2% or more, since manufacture becomes easy, it is preferable.

In the antiglare film of this embodiment, the average wavelength (Sλa) of the concavo-convex structure is 5 to 300 μm.
If the average wavelength (Sλa) of the concavo-convex structure exceeds 300 μm, the concavo-convex structure on the antiglare film surface can be visually observed, so that the quality of the image when attached to the display tends to be low. Moreover, it is preferable from a manufacturing surface that the average wavelength (Sλa) of the concavo-convex structure is 5 μm or more.
The preferable range of the average wavelength (Sλa) of the concavo-convex structure is 8 to 250 μm, more preferably 10 to 200 μm, and still more preferably 90 to 160 μm.

In the antiglare film of the present embodiment, the average wavelength (Sλa) and the center plane average roughness (SRa) satisfy the following formula (1).
0.0006 (Sλa) <(SRa) <0.0006 (Sλa) +0.12 (1)
When the value of (SRa) is lower than the left side, the antiglare property tends to decrease.
When the value of (SRa) exceeds the right side, the transmitted image definition tends to decrease due to the increase in haze.

A preferable range of the value of the center plane average roughness (SRa) is a value that satisfies the following formula (2).
0.0006Sλa + 0.02 <(SRa) <0.0006 (Sλa) +0.10 (2)
More preferably, it is the range of following formula (3).
0.0006Sλa + 0.04 <(SRa) <0.0006Sλa + 0.09 (3)

  In addition, when the value of the center plane average roughness (SRa) is 0.001 μm or more, it is preferable because the antiglare film of the present embodiment can be easily manufactured.

  When the optical comb having a light-shielding portion and a light-transmitting portion is used, the anti-glare film of this embodiment has image clarity when the difference between the transmitted image definition and the reflected image definition at 2 mm comb is 40% or more. Is preferable. More preferably, it is 50% or more.

The method for measuring the image definition conforms to JIS K-7105.
Specifically, the Suga test can be measured using the machine ICM-1T.
The transmitted image definition is evaluated by attaching an antiglare film to a predetermined glass plate and transmitting light perpendicular to the antiglare film surface.
The reflected image sharpness is evaluated by the sharpness of an image reflected by applying a black vinyl tape to the back surface of a predetermined glass plate and irradiating a light beam in a 45 ° direction with respect to the antiglare film surface.

The transmitted image definition can be used as an antiglare film even if it is 30% or more, but is preferably 50% or more, more preferably 80%, and further preferably 90% or more.
Further, although the reflected image definition can be used even at 50% or less, it is preferably 45%, more preferably 40% or less.

  Since the display is expected to have higher definition in the future, when the antiglare film of this embodiment is applied to such a display, the transmitted image clarity at 1 mm comb is 40%. If it is above, it is possible to maintain a good image quality in a high-definition display.

  The total light transmittance of the antiglare film of this embodiment is preferably 88% or more, and more preferably 90% or more. If it is less than 88%, the transmitted image tends to be blurred or the luminance of the transmitted image tends to decrease.

[Method for producing antiglare film]
The manufacturing method of the anti-glare film of this embodiment is demonstrated.
A method of forming a concavo-convex structure by laminating a layer having a concavo-convex shape with a resin on a transparent film is preferable from the viewpoint of simplicity and quality.
Examples of the resin used in this case include a thermosetting resin and an ionizing radiation curable resin that is cured by ultraviolet rays or light. Among these, the method by the curing treatment by ultraviolet irradiation is simple and preferable.

  Examples of the ultraviolet curable resin include acrylate resin, methacrylate resin, urethane acrylate resin, and urethane methacrylate resin. Furthermore, polyether resins having polyester functional groups, polyester resins, epoxy resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, melamine resins, urethane resins, alkyd resins, silicone resins, etc. It can be used as appropriate. These resins may be used alone or in a combination of two or more.

It is preferable to mix an ultraviolet polymerization initiator (photopolymerization initiator) with the ultraviolet curable resin.
Examples of the photopolymerization initiator include benzophenone, benzophenone-based, benzyl ketal-based, α-hydroxyacetophenone-based, aminoacetophenone-based, and acylphosphine oxide-based compounds.

  In the resin for forming the concavo-convex structure, a pigment, a filler, a dispersant, an antistatic agent, a plasticizer, an ultraviolet absorber, an infrared absorber, a leveling agent, a surfactant, and an antifouling agent are added as necessary. , Antioxidants, release agents and the like may be included.

Next, the method of laminating the concavo-convex resin to form the concavo-convex structure is as follows. After the resin is coated on the mold having the concavo-convex shape, the resin is cured or semi-cured, then the film is laminated, and then peeled from the mold And a method of transferring the resin layer to the transparent film, a method of coating the resin on the transparent film, and then curing or semi-curing it together with the mold and then peeling it from the mold.
As the curing method, depending on the resin used, curing by heat, curing means by electron beam or ultraviolet rays can be performed.
In addition, when making it peel from a type | mold in a semi-hardened state, a hardening process can be performed after peeling. As the curing means at this time, a method different from the semi-curing means can be used.

  When removing the resin whose uneven shape has been copied from the mold, a release agent may be added to the resin in order to remove the resin from the mold without any defects, and a fluorine-based compound is applied to the surface of the mold. For example, a method of facilitating release by forming a thin film may be applied.

Examples of the resin coating method for the mold having the uneven shape include dipping, spin coater, knife coater, bar coater, blade coater, squeeze coater, reverse roll coater, gravure roll coater, slide coater, curtain coater, and spray coater. A known method such as a die coater or a cap coater can be used.
Of these, knife coaters, bar coaters, blade coaters, squeeze coaters, reverse roll coaters, gravure roll coaters, slide coaters, curtain coaters, spray coaters, die coaters and cap coaters that can be continuously applied are preferably used.

  As the mold having an uneven shape, any of a roll shape, a plate shape, and a film shape can be used, but a roll shape and a film shape die that can be continuously manufactured are preferable.

  The uneven shape of the mold for forming the uneven structure can be formed by machining, laser processing, electron beam processing (EB drawing), etc., but the uneven shape is derived from the speckle pattern by interference exposure The non-uniform shape is preferable.

About the formation method of the uneven | corrugated uneven | corrugated shape by a speckle pattern, it conforms to the method of Japanese translations of PCT publication No. 2003-525472 (international publication 01/065469).
Specifically, a light source, a mask having a variable size and shape opening provided in an optical path of light projected from the light source, and a plate for recording a speckle pattern generated by the light projected from the light source; A diffusing plate for diffusing light from the light source between the mask and the plate, and changing the size and shape of the opening of the mask, the diffusibility of the diffusing plate, and the distance between the constituent members to obtain a desired speckle A pattern can be formed.

The speckle pattern obtained in this way is recorded on a photosensitive resin or photoresist applied on the plate, so that it can be developed to obtain a submaster on which irregularities derived from the speckle pattern are formed. .
By attaching a metal to the submaster mold by a method such as electroforming, a mold having a non-uniform uneven shape derived from the speckle pattern can be manufactured.
Using this mold, an antiglare film in which a non-uniform uneven structure derived from a speckle pattern is formed on a transparent film is obtained. By using this antiglare film for a display, there is no occurrence of moire. High quality screen can be provided.

[Additional structure of anti-glare film]
In the antiglare film of the present embodiment, a predetermined low refractive index layer may be provided on the surface of the uneven uneven structure provided on the transparent film.
By forming the low refractive index layer, the contrast of the transmitted image can be improved, and the effect of reducing the reflectance of the reflected image due to external light can be obtained, so that the visibility can be further improved.

The low refractive index layer is a layer having a refractive index lower than that of the material forming the uneven uneven structure, and preferably has a refractive index of 1.25 to 1.45 at a wavelength of 550 nm.
The refractive index of the low refractive index layer is preferably controlled by controlling the type and amount of fine particles and the type and amount of binder so that the minimum reflectance at an incident angle of 5 degrees is 2% or less.
The thickness of the low refractive index layer is preferably in the range of 50 nm to 250 nm. From the viewpoint of antireflection performance in the visible light region, the thickness is usually adjusted to have a minimum reflectance wavelength of 500 to 750 nm at an incident angle of 5 degrees. The ones made are preferred. The thickness of the low refractive index layer may be controlled by adjusting the content of the fine particles and the binder and the coating thickness so as to obtain a necessary thickness. The coating method is in accordance with the method used in the application of the resin having the above-described uneven shape.

The low refractive index layer preferably includes silica fine particles and a binder.
Silica fine particles may or may not have cavities inside. From the viewpoints of dispersibility, surface properties of the resulting low refractive index layer, and mechanical strength, the average particle size of the silica fine particles is preferably 200 nm or less.
When the average particle diameter of the silica fine particles exceeds 200 nm, the haze of the antiglare film tends to increase and white blurring of the surface tends to occur.
The use of hollow silica fine particles having cavities inside the particles as the silica fine particles is preferable because the refractive index of the low refractive index layer can be lowered.
Since the cavity of the silica fine particles is surrounded by the outer shell, the binder does not enter the cavity. The presence of the cavity can reduce the refractive index, and the blocking of the binder from entering the cavity can prevent an increase in the refractive index. A low refractive index can be realized in the refractive index layer.

When hollow silica fine particles are used as the silica fine particles, the average particle diameter of the hollow silica fine particles is preferably 40 to 200 nm.
When the hollow silica fine particle diameter is larger than 200 nm, the refractive index decreases when the thickness of the outer shell surrounding the cavity is almost constant, but the strength of the hollow silica fine particle tends to be weak, and the surface When the unevenness becomes too large, the transmitted image is blurred and white blurring of the antiglare film surface tends to occur.
If the hollow silica fine particles are smaller than 40 nm, the strength is increased, but it is difficult to lower the refractive index.
Since the refractive index correlates with the cube of the particle diameter, the particle diameter is a very large factor for controlling the refractive index.
From these viewpoints, those having an average particle diameter of 60 to 200 nm are particularly preferably used.

The refractive index of the hollow silica fine particles is preferably 1.40 or less from the viewpoint of lowering the refractive index of the low refractive index layer.
If the refractive index of the hollow silica fine particles is greater than 1.40, the effect of lowering the refractive index of the low refractive index layer is low. As the hollow silica fine particles, those having a refractive index of 1.10 to 1.35 are preferably used.

As silica fine particles, two or more types of silica fine particles or hollow silica fine particles may be used in combination.
Next, the binder for forming the low refractive index layer will be described. As the binder, a transparent resin that does not deteriorate the performance of the film is used. For example, hydrolyzable silane compounds, reactive silane compounds having functional groups that form covalent bonds with silica particles, silanol group-containing silicon compounds, active silica, polyethers, acrylate resins, methacrylate resins, polyesters, polyacrylamide derivatives, poly Methacrylamide derivatives, polyurethane, polycarbonate and the like can be used.

In addition to the above, the antiglare film of the present embodiment may be laminated with a predetermined coating layer having a function other than the antiglare function within a range in which the performance is not deteriorated.
For example, an adhesive layer may be provided on the back surface so that it can be attached to a display. The thickness of a general pressure-sensitive adhesive layer is about 5 to 50 μm. As the pressure-sensitive adhesive, those using a base polymer such as a base polymer and a polar monomer such as an acrylic ester, methacrylic ester, butyl rubber, or silicone can be used. The pressure-sensitive adhesive usually has a polar monomer copolymerized in these base polymers. Examples of the polar monomer include (meth) acrylic acid, 2-hydroxyethyl (meth) acrylate, and (meth) acrylic acid 2. Examples thereof include monomers having a carboxyl group, a hydroxyl group, an amino group, an epoxy group, and the like, such as -hydroxypropyl, (meth) acrylamide, N, N-dimethylaminoethyl (meth) acrylate, and glycidyl (meth) acrylate. Examples of the crosslinking agent include divalent or polyvalent metal salts that form carboxylic acid metal salts with carboxyl groups, polyisocyanate compounds that form amide bonds with carboxyl groups, and the like. One or two or more crosslinking agents are used as a mixture with the base polymer.
In addition, since the surface of the antiglare film is easily contaminated by dust, finger contact, etc., an antifouling layer is applied to the surface to the extent that the antiglare property is not impaired in order to prevent adhesion or remove contaminants. It may be provided.
As a material for the contamination prevention layer, for example, a fluororesin, a moisture curable silicone resin, and a thermosetting silicone resin are preferable. The film thickness of the contamination prevention layer is usually 50 nm or less, preferably 10 nm or less.
The coating method of the predetermined coating layer having a function other than the antiglare function is in accordance with the method used in the coating of the resin having the concavo-convex shape.

  Hereinafter, although a specific Example and a comparative example with this are given and demonstrated, this invention is not limited to a following example.

[Transparent image clarity]
Using an image clarity measuring device “ICM-1T” manufactured by Suga Test Instruments Co., Ltd., a glass plate (MICRO SLIDE GLASS S9111, manufactured by Matsunami Glass Industrial Co., Ltd.) and an acrylic optical adhesive (TD06A, manufactured by Yodogawa Paper Co., Ltd.) The optical films produced in the examples and comparative examples described later are pasted with the transparent film side facing the glass plate, and set so that light passes through the optical film vertically. ”Of the optical combs of“ 2 ”and 1 mm of optical combs were measured.

[Reflective image clarity]
Using an image clarity measuring device “ICM-1T” manufactured by Suga Test Instruments Co., Ltd., a glass plate (MICRO SLIDE GLASS S9111, manufactured by Matsunami Glass Industrial Co., Ltd.) and an acrylic optical adhesive (TD06A, manufactured by Yodogawa Paper Co., Ltd.) The optical film produced in the Example and comparative example which are mentioned later was stuck in the state which orient | assigned the transparent film side to the glass plate.
In order to cut the reflected light on the back side of the glass plate, a black vinyl tape was attached to the back side.
Setting was made so that light was incident on the optical film at an angle of 45 °, and the sharpness of the reflected image was measured in the optical comb of 2 mm and the optical comb of 1 mm among the optical combs of the ICM-1T.

[Center surface average roughness (SRa) and average wavelength (Sλa)]
The optical film produced in the Example and comparative example which are mentioned later is stuck on the glass plate (MICRO SLIDE GLASS S9111, made by Matsunami Glass Industry Co., Ltd.) having a thickness of 5 mm or more, and the surface shape measuring instrument “Surf coder of Kosaka Laboratory Co., Ltd. An area of 500 μm × 200 μm to 1 mm × 1 mm was measured using “ET4000”.
Selection of the measurement area was performed by measuring 1 mm × 1 mm when the average wavelength (Sλa) exceeds 40 μm, and evaluating in the other area of 500 μm × 200 μm.
When the measurement area is 1 mm × 1 mm, the X-axis feed rate is 0.2 mm / s and the Y pitch is 10 μm. When the measurement area is 500 μm × 200 μm, the X-axis feed rate is 0.1 mm / s and the Y pitch is 2 μm. It was.
The raw data was leveled by the least square method, and the surface shape parameters were calculated without using a cut-off.
SRa and Sλa were calculated using the standard software “3D surface roughness analysis program TDA-22” of “ET4000”.

[Measurement of haze]
It measured by the method prescribed | regulated to JISK7361-1 using Nippon Denshoku Industries Co., Ltd. turbidimeter (cloudiness meter) "NDH2000".

〔contrast〕
When a film is placed on the screen of the plasma display and the screen is visually evaluated, ◎ indicates that the degree of white blur is very low, ○ indicates that the degree of white blur is low, and x indicates that white blur is seen. did.

[Image clarity]
As an image clarity index, the difference (ab) between the value of transmitted image definition a measured with an optical comb of 2 mm and the value b of reflected image definition was obtained. The greater the difference, the better the image clarity.

[Examples 1 to 3], [Comparative Examples 1 to 3]
Six types of optical films (antiglare films) having different irregularities were evaluated.
Concerning the concavo-convex shape of the surface, according to the description in JP-T-2004-508585, the concavo-convex structure by interference exposure by changing each kind and distance such as laser light source, objective lens, photosensitive material, developer, and development time. These were electroformed as submasters to obtain a square plate-like nickel metal mold having a side of about 10 cm.
Thereafter, on the transparent film of the material shown in Table 1 below, various optical films were obtained by shaping the urethane acrylate ultraviolet curable resin with ultraviolet rays using the master mold.
The transparent film used is as follows.
PET film: A4300 manufactured by Toyobo Co., Ltd. (thickness 100 μm, 188 μm, 250 μm)
TAC film: FTTD80ULN manufactured by Fuji Photo Film Co., Ltd.
The surface shape chart which measured the optical film of Examples 1-3 and Comparative Examples 1-3 with the surface roughness measuring machine is shown in FIGS. 1-6, respectively.
Table 1 below shows the evaluation results of the obtained optical film measured by various measuring methods.

  As shown in Table 1, according to Examples 1 to 3, an anti-glare film having both high anti-glare properties, glare suppression, and contrast reduction suppression effects and high image quality can be obtained.

  The anti-glare film of the present invention is an organic / inorganic EL display, plasma display, TV CRT, notebook computer, electronic notebook, touch panel, liquid crystal television, liquid crystal display, in-vehicle television, liquid crystal video, projection television, plasma address liquid crystal display, As an anti-glare film for field emission displays, light-emitting diode displays, lighting globes, fluorescent lamps, mirrors, watches, showcases, foreheads, semiconductor lithography, copy machines, liquid crystal game machines, pachinko machine glasses, game machines, etc. Have the availability of.

Claims (3)

It has a non-uniform uneven structure provided on a transparent film,
The haze value (H) is 1.2% or less,
An average wavelength (Sλa) of the concavo-convex structure is 5 to 300 μm;
The antiglare film in which the average wavelength (Sλa) and the center surface average roughness (SRa) of the uneven structure satisfy the following formula (1).
0.0006 (Sλa) <(SRa) <0.0006 (Sλa) +0.12 (1)   The anti-glare film according to claim 1, wherein the non-uniform uneven structure is formed by interference exposure.   The antiglare film according to claim 1 or 2, wherein a material of the transparent film is triacetyl cellulose.