JP2007101912A - Antiglare film, polarizing film, optical film and image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antiglare film, etc. which makes both the anti-reflection property (securing antiglare property) and haze prevention compatible, and also permits compatibility of glittering (scintillation) prevention, as well as securing of clearness, and even if an antireflection layer (AR layer) is disposed, will not impair the anti-reflection function. <P>SOLUTION: The anti-glare film 100 is provided with a first resin layer 101 made of a transmissive resin 21 containing fine particles 1; and a second resin layer 102 which is laminated on the first resin layer 101, has a rugged surface on the side thereof opposite to the first resin layer 101 and is made of a transmissive resin 22. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an antiglare film, a polarizing film, an optical film, and an image display device using these films, which are used for suppressing a decrease in image visibility in an image display device such as a liquid crystal display device. In particular, the present invention achieves both prevention of glare (ensurement of antiglare properties) and prevention of white blurring, as well as compatibility of ensuring clarity and prevention of glare (scintillation), and furthermore, an antireflection layer (AR layer). The present invention relates to an antiglare film, a polarizing film, an optical film and an image display device using these films that do not impair the antireflection function.

  An image display device such as a liquid crystal display device impairs the visibility of the image by reflecting light from room lighting such as a fluorescent lamp, sunlight incident from a window, and external light such as an operator's shadow on the surface. . For this reason, conventionally, on the surface of the image display device, the reflected light on the surface is diffused to suppress the regular reflection of the external light, thereby preventing the reflection of the external light (having antiglare properties). An anti-glare film is arranged for the purpose.

  FIG. 1 is a longitudinal sectional view schematically showing a schematic configuration of various conventionally proposed antiglare films. An antiglare film 100A shown in FIG. 1A corresponds to, for example, the configuration proposed in Patent Document 1, and is based on an antiglare layer 10A made of a translucent resin 2 containing fine particles 1. It is formed on the material 3. And the surface of 10 A of glare-proof layers is set as the structure which has uneven | corrugated shape by making a part of microparticles | fine-particles 1 protrude from the surface of 10-A of glare-proof layers.

  According to the antiglare film 100A shown in FIG. 1A, it is possible to diffuse reflected light and suppress reflection of external light by appropriately designing the uneven shape on the surface of the antiglare layer 10A. However, depending on the degree of unevenness, the light diffusibility becomes too high, resulting in a phenomenon called so-called white blurring that causes the display screen to become whitish when performing black display on the image display device, and the contrast of the image decreases. Problem arises. In order to prevent this white blur and at the same time prevent the reflection of external light, that is, to ensure both the anti-glare property and the white blur prevention, it is necessary to design the concavo-convex shape with high accuracy. However, since the anti-glare film 100A shown in FIG. 1A has a configuration in which the concavo-convex shape is determined by the position and number of the fine particles 1 contained in the anti-glare layer 10A, the concavo-convex shape is designed with high accuracy. In reality, there is a problem that it is difficult to achieve both anti-glare properties and prevention of blurring.

  An antiglare film 100B shown in FIG. 1B corresponds to, for example, the configuration proposed in Patent Document 2, and an antiglare layer 10B made of a translucent resin 2 is formed on the substrate 3. Has been. And it is set as the structure which the surface of the glare-proof layer 10B has uneven | corrugated shape.

  According to the antiglare film 100B shown in FIG. 1 (b), it is possible to diffuse reflected light and suppress reflection of external light by appropriately designing the uneven shape on the surface of the antiglare layer 10B. Unlike the anti-glare film 100A shown in FIG. 1A, the uneven shape is not determined by the position and number of fine particles, but the uneven shape is designed with high accuracy by shaping with an embossing roller, for example. Therefore, it is relatively easy to ensure both antiglare property and prevention of blurring. However, since the antiglare film 100B shown in FIG. 1B does not contain fine particles, the lens effect due to surface irregularities cannot be mitigated by internal scattering due to the fine particles, and the display screen of the image display device glare. There is a problem that (scintillation) occurs. More specifically, this glare is considered to be caused by enlargement of the pixel when the focal point of the lens formed by the curvature of the surface unevenness coincides with the pixel position of the image display device. . If fine particles are present between the lens and the pixel, the light emitted from the pixel is scattered by the fine particle and the straightness of the light is reduced, so that it is possible to suppress glare. However, since the anti-glare film 100B shown in FIG. 1B does not contain fine particles, internal scattering due to the fine particles does not occur, and as a result of enlargement of pixels due to surface irregularities, glare occurs. There's a problem.

  An anti-glare film 100 </ b> C shown in FIG. 1C corresponds to the configuration proposed in Patent Documents 3 and 4, for example, and an anti-glare layer 10 </ b> C is formed on the substrate 3. The antiglare layer 10C is formed by laminating a resin layer 10a made of a translucent resin 2a containing fine particles 1a and a resin layer 10b made of a translucent resin 2b containing fine particles 1b. And the surface of 10 C of glare-proof layers is set as the structure which has uneven | corrugated shape by making a part of microparticles | fine-particles 1b protrude from the surface of the resin layer 10b.

  According to the anti-glare film 100C shown in FIG. 1C, it is possible to diffuse reflected light and suppress reflection of external light by appropriately designing the uneven shape on the surface of the anti-glare layer 10C. Further, the antiglare layer 10C is divided into a resin layer 10a and a resin layer 10b, and is designed to generate appropriate internal scattering mainly by the fine particles 1a contained in the resin layer 10a, while being contained in the resin layer 10b. Since it can be designed such that the irregular shape is imparted by the fine particles 1b, the design restrictions are eased as compared with the anti-glare film 100A shown in FIG. However, like the anti-glare film 100A shown in FIG. 1A, the uneven shape is determined by the position and number of the fine particles 1b contained in the resin layer 10b. In reality, there is a problem that it is difficult to achieve both anti-glare properties and prevention of white blurring. In addition, since the resin layer 10a and the resin layer 10b both contain fine particles, the haze value (diffuse transmittance / total light transmittance) is increased and the sharpness (transmission sharpness) is significantly reduced. There is.

  An anti-glare film 100D shown in FIG. 1 (d) corresponds to, for example, the configuration proposed in Patent Document 5, and is based on an anti-glare layer 10D made of a translucent resin 2 containing fine particles 1. It is formed on the material 3. And it is set as the structure by which uneven | corrugated shape was shaped on the surface of the glare-proof layer 10D.

  According to the antiglare film 100D shown in FIG. 1D, it is possible to diffuse reflected light and suppress reflection of external light by appropriately designing the uneven shape of the surface of the antiglare layer 10D. And since the uneven | corrugated shape can be designed with a sufficient precision by shaping | molding, it is also comparatively easy to make anti-glare property and whitening prevention compatible. In addition, by designing the microparticles 1 contained in the antiglare layer 10D to generate appropriate internal scattering, it is possible to prevent glare without significantly reducing the sharpness. However, the anti-glare film 100D shown in FIG. 1 (d) has the fine particles 1 at the portion where the irregular shape is formed, and the translucent light existing between the air layer and the fine particles 1 as shown in FIG. The thickness t of the conductive resin 2 may be extremely small locally. In this case, there is a problem that color unevenness or the like occurs in the reflected light due to the interference (thin film interference) action of the portion of thickness t. Further, when the thickness t is in the vicinity of λ / 2 (λ is the wavelength of external light), the reflected light at the outermost surface of the antiglare film 100D and the reflection at the interface between the fine particles 1 and the translucent resin 2 are used. There is also a problem that the light may interfere and strengthen, and the reflectivity may increase, leading to a decrease in visibility.

Further, for example, as proposed in Patent Document 6, even when the antireflection layer (AR layer) 4 is provided on the uneven surface of the antiglare layer 10D (see FIG. 3), the interference effect of the portion having the thickness t. Therefore, there is a problem that the optical design of the AR layer 4 is broken and the antireflection effect may be locally impaired.
JP 2000-121809 A JP 2004-29672 A JP 2003-302506 A JP 2002-90508 A JP 2004-348156 A JP 2003-4904 A

  The present invention has been made to solve such problems of the prior art, and achieves both prevention of glare (ensuring anti-glare properties) and prevention of white blurring, as well as ensuring clarity and glare (scintillation). Anti-glare film, polarizing film, optical film and images using these films that do not impair the anti-reflection function even when an anti-reflection layer (AR layer) is provided. It is an object to provide a display device.

  In order to solve the above-mentioned problems, the present invention provides a first resin layer formed of a light-transmitting resin containing fine particles, a layer laminated on the first resin layer, and a surface opposite to the first resin layer. The present invention provides an antiglare film comprising a second resin layer formed of a translucent resin having an uneven shape.

  According to such an invention, the first resin layer and the second resin layer can be controlled independently, and the degree of freedom in design is improved. Specifically, the uneven shape of the second resin layer that does not contain fine particles can be designed with high accuracy, for example, by molding with an embossing roller, etc., so that both anti-glare property and white blur prevention can be achieved. Is possible. And by ensuring that the fine particles contained in the first resin layer cause the minimum internal scattering to suppress glare, it is possible to achieve both ensuring clarity and preventing glare. is there. Furthermore, since there are no fine particles in the concave and convex shape of the second resin layer, there is no interference effect due to the thickness of the translucent resin existing between the air layer and the fine particles, and antireflection on the concave and convex surface. Even when a layer (AR layer) is provided, its antireflection function is not impaired. As described above, the antiglare film according to the present invention achieves both prevention of reflection (ensuring antiglare properties) and prevention of white blurring, and also enables both ensuring of clarity and prevention of glare (scintillation). Furthermore, even when an antireflection layer (AR layer) is provided, the antireflection function is not impaired.

  In addition, it is possible to obtain the polarizing film which has anti-glare property by laminating | stacking the anti-glare film which concerns on this invention on the conventional general polarizing film. That is, a protective film (TAC film or the like) constituting a general polarizing film in which a protective film such as a triacetyl cellulose (TAC) film is bonded to both surfaces of a polyvinyl alcohol (PVA) film is used as a base material. In addition, it is possible to obtain a polarizing film having antiglare properties by laminating the first resin layer and the second resin layer (antiglare film).

  However, as a polarizing film having an antiglare property using the antiglare film according to the present invention, a polyvinyl alcohol film, the antiglare film laminated on one surface of the polyvinyl alcohol film, and the polyvinyl alcohol A polarizing film comprising a protective film laminated on the other surface of the film is preferable.

  According to such an invention, since the anti-glare film itself functions as a protective film for a polyvinyl alcohol (PVA) film (polarizer), it is provided on both sides of the PVA film like a conventional general polarizing film. There is no need to attach a protective film such as a TAC film. Therefore, it is possible to simplify the manufacturing process and reduce the thickness, and to obtain a polarizing film that has both the protective function of the polarizer and the antiglare property. The polarizing film in the present invention is not limited to a configuration in which an antiglare film and a PVA film are separately produced and bonded together using an adhesive or the like. The first resin layer and the second resin layer are sequentially formed by coating or the like. Moreover, as a protective film laminated | stacked on the other surface of the polyvinyl alcohol film in this invention, from a translucent resin which forms a 1st resin layer and a 2nd resin layer other than a general TAC film can be used. It is also possible to use a film.

  Preferably, the translucent resin forming the first resin layer and / or the second resin layer is a solventless resin.

  According to such a preferable configuration, when the antiglare film is laminated on the water-absorbing polyvinyl alcohol film (particularly, the first resin layer and the second resin layer are laminated by coating or the like using the PVA film as a base material). At the same time, since the heating and drying step of the first resin layer and / or the second resin layer is not required, there is an advantage that the manufacturing process can be simplified.

  The present invention is also provided as an optical film in which the antiglare film or the polarizing film is laminated. The object on which the antiglare film and the polarizing film are laminated is not particularly limited as long as the optical properties of these films are not impaired, but examples thereof include a retardation film and a brightness enhancement film. Can do.

  Furthermore, this invention is provided also as an image display apparatus provided with the said anti-glare film, the said polarizing film, or the said optical film. Although the kind of image display apparatus is not specifically limited, A liquid crystal display device, an organic electroluminescent (EL) display, a plasma display etc. can be illustrated.

  According to the present invention, it is possible to achieve both prevention of reflection (ensuring anti-glare properties) and prevention of white blur, and also ensuring both clarity and prevention of glare (scintillation). Further, an anti-reflection layer (AR layer) ), The antireflection function is not impaired.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 4 is a longitudinal sectional view schematically showing a schematic configuration of an antiglare film according to an embodiment of the present invention. As shown in FIG. 4, the antiglare film 100 according to the present embodiment is laminated on the first resin layer 101 formed from the translucent resin 21 containing the fine particles 1 and the first resin layer 101, The surface opposite to the first resin layer 101 is provided with a second resin layer 102 formed of a translucent resin 22 (not containing fine particles) having an uneven shape. The first resin layer 101 and the second resin layer 102 form the antiglare layer 10. In the present embodiment, the anti-glare layer 10 is the anti-glare film 100 formed on the substrate 3, but the present invention is not limited to this, and the second anti-glare film is formed on the first resin layer 101. Of course, an anti-glare film consisting only of the anti-glare layer 10 on which the resin layer 102 is laminated is also possible.

  The type of the fine particles 1 is not particularly limited, and general particles used for so-called antiglare treatment can be used. Examples thereof include fine particles made of polymethyl methacrylate, silica, polystyrene, metal oxide, etc. as described in JP-A-2003-66207.

  The size of the fine particles 1 is preferably about 0.1 to 100 μm. If it is smaller than 0.1 μm, the effect of preventing glare due to internal scattering is lost, and if it is larger than 100 μm, the haze value is remarkably increased and the sharpness is lowered.

  The type of the light-transmitting resin 21 and the light-transmitting resin 22 is not particularly limited, but is preferably an energy ray curable resin that is cured by energy rays such as ultraviolet rays and electron beams (for example, JP UV curable resin as described in JP 2002-90508 A is used. Examples of the ultraviolet curable resin include polyester-based, acrylic-based, and urethane-based resins. It is also possible to use a thermosetting resin, a thermoplastic resin, a moisture curable resin, or the like.

  As the translucent resin 21 and the translucent resin 22, it is preferable to use materials having the same or similar refractive indexes from the viewpoint of preventing a decrease in visibility due to reflection at the interface between them. Moreover, it is preferable to use materials having the same or similar chemical composition from the viewpoint of facilitating securing of interface adhesion by improving chemical affinity.

  Although the manufacturing method of the anti-glare film 100 which has the above structure is not specifically limited, For example, it can produce by the following processes. That is, first, a translucent resin 21 containing fine particles 1 is applied on the base material 3 (in this embodiment, a resin liquid containing the translucent resin 21), heated and dried, and then subjected to energy rays. Irradiation is cured to form the first resin layer 101. Next, a translucent resin 22 (in this embodiment, a resin liquid containing the translucent resin 22) is applied on the first resin layer 101, and after heating and drying, it is cured by irradiation with energy rays, A second resin layer 102 is formed. Finally, a concavo-convex shape is formed on the surface of the second resin layer 102 opposite to the first resin layer 101, whereby the antiglare film 100 is produced. In addition, although it does not specifically limit as a shaping method of uneven | corrugated shape, From the viewpoint of productivity, Preferably, the embossing by an embossing roller is used.

  In addition, as another manufacturing method of the anti-glare film 100, as described later, by using a solvent-free resin as the light-transmitting resin 21 and / or the light-transmitting resin 22, the light-transmitting resin in the manufacturing method described above. It is also possible to employ a method in which the heating and drying step of 21 and / or translucent resin 22 is omitted.

  Further, when the resin liquid including the translucent resin 22 forming the second resin layer 102 has a relatively low viscosity, after the resin liquid is applied on the first resin layer 101, the resin liquid An embossing roller or the like is brought into contact with the surface opposite to the first resin layer 101, and at the same time, an uneven surface is formed on the surface of the second resin layer 102 by irradiating and curing energy rays from the substrate 3 side. You may adopt the method of doing.

  On the other hand, when the resin liquid containing the translucent resin 22 forming the second resin layer 102 has a relatively high viscosity, after the resin liquid is applied onto the first resin layer 101, the resin liquid An embossing roller or the like is brought into contact with the surface opposite to the first resin layer 101, and then the second resin layer 102 is cured by irradiating with energy rays from at least one surface side of the obtained film. It is possible to employ a method of fixing the uneven shape formed on the surface of the material.

  In addition, a resin liquid containing a translucent resin 22 that forms the second resin layer 102 is applied onto the first resin layer 101, and energy rays are weakly irradiated (half-cure) to form a soft state. It is also possible to adopt a method in which the uneven shape is formed on the two resin layers 102 and then irradiated with energy rays to be fully cured to fix the uneven shape.

  Also, the following manufacturing method can be employed. That is, first, a resin liquid containing the translucent resin 22 for forming the second resin layer 102 is directly applied on the embossing roller, and the resin liquid is cured by irradiating energy rays from the surface opposite to the embossing roller. By doing so, the second resin layer 102 formed with an uneven shape is formed. Immediately after that, the transparent resin 21 for forming the first resin layer 101 is applied onto the second resin layer 102, and the first resin layer 101 is formed by irradiating and curing the energy rays in the same manner as described above. To do. Then, the first resin layer 101 and the second resin layer 102 are peeled from the embossing roller to form a film. This is a manufacturing method in which the film thus obtained is bonded to the substrate 3 using an adhesive or the like.

  Furthermore, as will be described later, when the first resin layer 101 and the second resin layer 102 function as a protective film for a PVA film (polarizer), the following manufacturing method may be employed. Is possible. That is, by using an appropriate method such as extrusion or casting, a thermoplastic resin containing the fine particles 1 in advance is formed into a film (the first resin layer 101 is formed), and the substrate 3 (preferably PVA as a polarizer). Film)) using an adhesive or the like. Then, the manufacturing method is to form the second resin layer 102 on the first resin layer 101. Alternatively, the first resin layer 101 and the second resin layer 102 are formed in advance, and this laminate is bonded to the substrate 3 (preferably a PVA film as a polarizer) using an adhesive or the like. It is also possible to adopt.

  According to the anti-glare film 100 according to the present embodiment, it is possible to accurately design the uneven shape of the second resin layer 102 by shaping so as to achieve both the anti-glare property and the prevention of white blur. . Further, the minimum internal scattering for suppressing glare by appropriately adjusting the size and number of the fine particles 1 contained in the first resin layer 101, the difference in refractive index between the fine particles 1 and the translucent resin 21, and the like. It is possible to achieve both ensuring of clarity and prevention of glare by designing so as to generate the above.

  In addition, it does not specifically limit as the base material 3 in this embodiment, For example, common films, such as a triacetyl cellulose (TAC) film and a polyacrylate, can be used. Then, by using one TAC film of a polarizing film made of a laminate of a TAC film, a PVA film, and a TAC film as a base material 3, and laminating the first resin layer 101 and the second resin layer 102 on the TAC film, It is also possible to obtain a polarizing film having dazzling properties.

  However, a PVA film is used as the base material 3, and a polarizing film in which a protective film such as a TAC film is laminated on the other surface of the PVA film (the surface opposite to the surface on which the first resin layer 101 is formed). It is preferable. In this polarizing film, since the first resin layer 101 and the second resin layer 102 function as a protective film for the PVA film (polarizer), both sides of the PVA film are conventional like conventional polarizing films. There is no need to attach a TAC film. Therefore, it is possible to simplify and thin the manufacturing process of the polarizing film having antiglare properties. In the polarizing film having antiglare properties, since the first resin layer 101 is in direct contact with the PVA film, it is formed of a flexible resin material, while the second resin layer 102 is an outer surface. It is preferably formed from a resin material having hard coat properties.

  Further, in the polarizing film having antiglare property, the translucent resin 21 that forms the first resin layer 101 and / or the translucent resin 22 that forms the second resin layer 102 is a solventless resin. Is preferred. Thereby, when laminating the first resin layer 101 and the second resin layer 102 on the base material 3 made of a PVA film having water absorption by coating or the like, the first resin layer 101 and / or the second resin layer 102. This eliminates the need for the heating and drying step, so that the manufacturing process can be simplified.

  Examples of the solventless resin include polyester-based, acrylic-based, urethane-based, epoxy-based, and ene / thiol-based resins. Among these, acrylic monomers and prepolymers are preferably used because the range of selection of the curing speed and the physical properties of the cured product is wide. Examples of acrylic prepolymers include polyester acrylates, polyether acrylates, polyurethane acrylates, epoxy acrylates, etc., and various types can be selected according to required properties (workability before curing, optical physical properties and mechanical properties of cured products, etc.). That's fine.

  Note that the present invention is characterized in that the antiglare film 100 (including a configuration including only the first resin layer 101 and the second resin layer 102 without the base material 3) or the polarizing film is laminated. Also provided as an optical film. The object on which the antiglare film 100 and the polarizing film are laminated is not particularly limited as long as the optical properties of these films are not impaired, but examples thereof include a retardation film and a brightness enhancement film. Can do.

  Hereinafter, the features of the present invention will be further clarified by showing examples and comparative examples.

  Example (corresponding to the configuration shown in FIG. 4), Comparative Example 1 (corresponding to the configuration shown in FIG. 1 (a)), Comparative Example 2 (corresponding to the configuration shown in FIG. 1 (b)), Comparative Example 3 (FIG. 1) (Corresponding to the configuration shown in (c)) and anti-glare films of Comparative Example 4 (corresponding to the configuration shown in FIG. 1 (d)) are laminated with glare, sharpness, haze, and antireflection layer (AR layer). The color unevenness, reflection (antiglare property) and white blur were evaluated. Each of these items was evaluated according to the following criteria.

(1) Glare The antiglare film was adhered to a non-surface-treated polarizing plate (thickness: 185 μm), and this was further bonded to a 1.1 mm thick glass plate to obtain a sample. This sample was placed on a lattice pattern placed on a backlight. The lattice pattern used had an opening of 90 μm × 20 μm, a vertical line width of 20 μm, and a horizontal line width of 40 μm. The distance from the lattice pattern to the resin layer was fixed at 1.3 mm, and the distance from the backlight to the lattice pattern was fixed at 1.5 mm. And from the anti-glare film side, the glare state was visually evaluated according to the following criteria.
○: A state in which there is almost no glare △: A level in which glare is present but is not bothersome and practically problematic ×: Level in which glare is severe and practically problematic

(2) Sharpness (transparent clarity)
According to JIS K7105, measurement was performed with an optical comb having a width of 0.5 mm using a Suga Test Instruments image clarity measuring device. Higher values mean higher clarity.

(3) Haze value The haze value was measured according to JIS K7105 using a haze meter manufactured by Suga Test Instruments.

(4) Color unevenness when an antireflection layer (AR layer) is laminated On the outermost resin layer constituting the antiglare film, reflection with a refractive index of 1.43 described in JP-A-2003-344608 The prevention layer was laminated with a thickness of about 100 nm. And the black acrylic board (thickness 2.0mm) made from Mitsubishi Rayon was bonded together with the adhesive on the back surface (surface opposite to the surface on which the resin layer was formed) of the base material, and reflection of light on the back surface was eliminated. . The light of the fluorescent lamp was directly reflected from the antireflection layer side of the sample produced as described above, and the minute change in the reflected color was visually evaluated according to the following criteria.
○: Almost no color unevenness Δ: Some color unevenness is observed, but there is no practical problem ×: Color unevenness is strong, practically problematic level

(5) Reflection (antiglare)
A black acrylic plate (thickness 2.0 mm) made by Mitsubishi Rayon is bonded to the back surface of the base of the antiglare film (the surface opposite to the surface on which the resin layer is formed) with an adhesive, and the light is reflected on the back surface. Was lost. The light of the fluorescent lamp was directly reflected from the resin layer side of the sample produced as described above, and the image of the fluorescent lamp image reflected on the sample surface was visually evaluated according to the following criteria.
○: Image of fluorescent lamp image is not known at all △: Image of fluorescent lamp image is blurred, but the outline can be slightly confirmed ×: Image of fluorescent lamp image can be clearly seen

(6) White blur The back surface of the base of the antiglare film (the surface opposite to the surface on which the resin layer is formed) is bonded with a black acrylic plate (thickness 2.0 mm) made by Mitsubishi Rayon with an adhesive. The reflection of the light in is lost. From the resin layer side of the sample produced as described above, as shown in FIG. 5, the light of the fluorescent lamp is incident from a direction that forms an angle of 30 ° with the normal A of the sample (incident light beam B). The diffuse reflected light C is visually observed from the direction with an azimuth angle of 180 ° with respect to the light B (that is, the diffuse reflected light C passing through the plane including the normal A and the incident light B is visually observed), and the degree of white blur Was evaluated according to the following criteria.
○: State of almost no white blur △: Level of white blur but not bothered and practically problematic ×: Level of white blur and practically problematic

Table 1 shows the evaluation results. In addition, the column of “AR lamination” in Table 1 means an evaluation result of color unevenness when an antireflection layer (AR layer) is laminated.

  As shown in Table 1, the antiglare films of Comparative Examples 1 and 3 were able to prevent white blur but could not prevent reflection. Although not shown in Table 1, when the uneven shape was designed so as to prevent the reflection, white blur could not be prevented. That is, in the anti-glare films of Comparative Examples 1 and 3, it was impossible to achieve both prevention of reflection (ensuring anti-glare property) and prevention of white blur.

  Further, the antiglare film of Comparative Example 2 could not prevent glare, and the antiglare film of Comparative Example 4 had some color unevenness when the AR layer was laminated.

  On the other hand, the anti-glare films of the examples were able to obtain good results for all items.

FIG. 1 is a longitudinal sectional view schematically showing a schematic configuration of various conventionally proposed antiglare films. FIG. 2 is an enlarged longitudinal sectional view schematically showing a schematic configuration of a part of a conventionally proposed antiglare film. FIG. 3 is an enlarged longitudinal sectional view schematically showing a schematic configuration of a part of another conventionally proposed antiglare film. FIG. 4 is a longitudinal sectional view schematically showing a schematic configuration of the antiglare film according to the present invention. FIG. 5 is an explanatory diagram for explaining a method for evaluating blurring of an antiglare film.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Fine particle 3 ... Base material 21 ... Translucent resin 22 ... Translucent resin 100 ... Anti-glare film 101 ... 1st resin layer 102 ... 2nd resin layer

Claims (5)

A first resin layer formed from a translucent resin containing fine particles;
An anti-glare film comprising: a second resin layer laminated on the first resin layer, the second resin layer being formed on a surface opposite to the first resin layer and having a concavo-convex shape. A polyvinyl alcohol film;
The antiglare film according to claim 1 laminated on one surface of the polyvinyl alcohol film,
A polarizing film comprising: a protective film laminated on the other surface of the polyvinyl alcohol film.   3. The polarizing film according to claim 2, wherein the translucent resin forming the first resin layer and / or the second resin layer is a solventless resin.   An optical film, wherein the antiglare film according to claim 1 or the polarizing film according to claim 2 or 3 is laminated.   An image display device comprising the antiglare film according to claim 1, the polarizing film according to claim 2 or 3, or the optical film according to claim 4.

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