Antiglare film and polarizing plate using the same, faceplate, image display panel, and image display device

Abstract

To provide an antiglare film which is excellent in an antiglare property so as to be able to suppress glare.SOLUTION: An antiglare film includes an antiglare layer and has a corrugated surface. A 60-degree specular gloss measured from a corrugated surface side is 30.0 or less and a variation coefficient of luminance is 0.0400 or less. The antiglare film preferably makes a 20-degree specular gloss measured from the corrugated surface side 6.0 or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an antiglare film, and a polarizing plate, a face plate, an image display panel, and an image display device each using the antiglare film. [Background technology]

[0002] Anti-glare films are sometimes installed on the surfaces of image display devices such as TVs, notebook PCs, and desktop PC monitors to provide anti-glare properties. Anti-glare properties are a property that suppresses the reflection of lighting and people in the background.

[0003] Anti-glare films are basically made up of a transparent substrate and an anti-glare layer with an uneven surface. Anti-glare films have the problem of causing glare due to the uneven surface. Glare is a phenomenon in which minute variations in brightness are visible in the light of an image.

[0004] For this reason, anti-glare films that combine anti-glare properties with reduced glare have been proposed (for example, Patent Documents 1 to 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-172641 A [Patent Document 2] JP 2015-172832 A [Patent Document 3] JP 2015-172834 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, conventional anti-glare films such as those described in Patent Documents 1-3 only provide anti-glare properties to the extent that the contours of lighting and people in the background are blurred, making it difficult to adequately suppress reflections of the background. On the other hand, by increasing the degree of roughness of the surface irregularities of the antiglare layer, it is possible to sufficiently suppress the reflection of the background and improve the antiglare properties. However, simply increasing the degree of roughness of the surface irregularities causes a problem of worsening glare.

[0007] An object of the present disclosure is to provide an antiglare film that has excellent antiglare properties and can suppress glare. [Means for solving the problem]

[0008] The present disclosure provides the following antiglare films [1] to [5], as well as polarizing plates, front plates, image display panels, and display devices each using the same. [1] An antiglare film having an antiglare layer, the antiglare film having an uneven surface, a 60 degree specular gloss measured from the uneven surface side of 30.0 or less, and a luminance variation coefficient of 0.0400 or less. (Measurement of the coefficient of variation of brightness) The surface of the anti-glare film opposite to the uneven surface is laminated on an image display device having a display element with a pixel density of 424 ppi. In a darkroom, the image of the image display device is displayed in green, and is photographed from the anti-glare film side with a CCD camera to obtain image data. The CCD camera has a pixel pitch of 5.5 μm×5.5 μm and a pixel count of 16 million pixels. The distance from the surface of the display element to the entrance pupil of the camera lens of the CCD camera is 500 mm. From the obtained image data, a region α of 128×128 pixels is extracted. The region α is subdivided into regions of 8×8 pixels each to obtain 256 small regions. In each small region, the luminance of each pixel of each small region is divided by the average luminance of all pixels of each small region to obtain a corrected luminance. The standard deviation of the corrected luminance of the 256 small regions is divided by the average value of the corrected luminance of the 256 small regions to calculate the luminance variation coefficient. [2] A polarizing plate having a polarizer, a first transparent protective plate arranged on one side of the polarizer, and a second transparent protective plate arranged on the other side of the polarizer, A polarizing plate, wherein at least one of the first transparent protective plate and the second transparent protective plate is the antiglare film described in [1], and the polarizer is arranged opposite the surface of the antiglare film opposite the uneven surface. [3] A face panel for an image display device, comprising a protective film laminated onto a resin plate or a glass plate, the protective film being the antiglare film described in [1], and the face of the antiglare film opposite the uneven surface being arranged opposite the resin plate or the glass plate. [4] An image display panel having a display element and an optical film arranged on the light output side of the display element, the optical film including the antiglare film described in [1], and the surface of the antiglare film on the uneven surface side facing away from the display element. [5] An image display device comprising the image display panel according to [4], and having the antiglare film disposed on the outermost surface. Effect of the Invention

[0009] The antiglare film of the present disclosure, and a polarizing plate, a front plate, an image display panel, and an image display device using the same, have excellent antiglare properties and can suppress glare. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic cross-sectional view showing one embodiment of an antiglare film of the present disclosure. [Diagram 2] FIG. 2 is a schematic diagram for explaining one embodiment of the positional relationship among an image display device, an anti-glare film, and a CCD camera when measuring the luminance variation coefficient. [Diagram 3] 3 is a schematic diagram for explaining the behavior of light incident on an antiglare film from the uneven surface side of the antiglare film. FIG. [Figure 4] 1 is a cross-sectional view illustrating an embodiment of an image display panel of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, embodiments of the present disclosure will be described. [Anti-glare film] The antiglare film of the present disclosure is an antiglare film having an antiglare layer, the antiglare film having an uneven surface, a 60 degree specular gloss measured from the uneven surface side of 30.0 or less, and a brightness variation coefficient of 0.0400 or less. (Measurement of the coefficient of variation of brightness) The surface of the anti-glare film opposite to the uneven surface is laminated on an image display device having a display element with a pixel density of 424 ppi. In a darkroom, the image of the image display device is displayed in green, and is photographed from the anti-glare film side with a CCD camera to obtain image data. The CCD camera has a pixel pitch of 5.5 μm×5.5 μm and a pixel count of 16 million pixels. The distance from the surface of the display element to the entrance pupil of the camera lens of the CCD camera is 500 mm. From the obtained image data, a region α of 128×128 pixels is extracted. The region α is subdivided into regions of 8×8 pixels each to obtain 256 small regions. In each small region, the luminance of each pixel of each small region is divided by the average luminance of all pixels of each small region to obtain a corrected luminance. The standard deviation of the corrected luminance of the 256 small regions is divided by the average value of the corrected luminance of the 256 small regions to calculate the luminance variation coefficient.

[0012] FIG. 1 is a schematic cross-sectional view of the cross-sectional shape of an antiglare film 100 of the present disclosure. The antiglare film 100 in Fig. 1 includes an antiglare layer 20 and has an uneven surface. In Fig. 1, the surface of the antiglare layer 20 is the uneven surface of the antiglare film. The antiglare film 100 in Fig. 1 has the antiglare layer 20 on a transparent substrate 10. The antiglare layer 20 in Fig. 1 has a binder resin 21 and particles 22. Fig. 1 is a schematic cross-sectional view. That is, the scale of each layer constituting the antiglare film 100, the scale of each material, and the scale of the surface irregularities are schematic for ease of illustration, and differ from the actual scale. The same is true for Figs. 2 to 4.

[0013] The antiglare film of the present disclosure is not limited to the laminated structure of FIG. 1. For example, the antiglare film may have a single layer structure of an antiglare layer, or may have a transparent substrate and layers other than the antiglare layer. Examples of layers other than the transparent substrate and the antiglare layer include an antireflection layer and an antifouling layer. When another layer is present on the antiglare layer, it is sufficient that the surface of the other layer is the uneven surface of the antiglare film. A preferred embodiment of the antiglare film has an antiglare layer on a transparent substrate, and the surface of the antiglare layer opposite to the transparent substrate is an uneven surface of the antiglare film.

[0014] <Transparent base material> The antiglare film preferably has a transparent substrate in order to facilitate the production of the antiglare film and to improve the handleability of the antiglare film.

[0015] The transparent substrate is preferably one having optical transparency, smoothness, heat resistance, and excellent mechanical strength. Examples of such transparent substrates include plastic films such as polyester, triacetyl cellulose (TAC), cellulose diacetate, cellulose acetate butyrate, polyamide, polyimide, polyethersulfone, polysulfone, polypropylene, polymethylpentene, polyvinyl chloride, polyvinyl acetal, polyether ketone, polymethyl methacrylate, polycarbonate, polyurethane, and amorphous olefin (Cyclo-Olefin-Polymer: COP). The transparent substrate may be one in which two or more plastic films are laminated together. Among the above, polyesters such as polyethylene terephthalate and polyethylene naphthalate that have been stretched, particularly biaxially stretched, are preferred in order to improve mechanical strength and dimensional stability. TAC and acrylic are preferred because of their good light transmittance and optical isotropy. COP and polyester are preferred because of their excellent weather resistance.

[0016] The thickness of the transparent substrate is preferably from 5 μm to 300 μm, more preferably from 20 μm to 200 μm, and further preferably from 30 μm to 120 μm. When it is desired to make the antiglare film thinner, the upper limit of the thickness of the transparent substrate is preferably 60 μm or less, more preferably 50 μm or less. When the transparent substrate is a low moisture permeable substrate such as polyester, COP, acrylic, etc., the upper limit of the thickness of the transparent substrate for making the film thinner is preferably 40 μm or less, more preferably 20 μm or less. Even in the case of a large screen, if the upper limit of the thickness of the transparent substrate is within the above-mentioned range, it is preferable in that the antiglare film is less likely to be distorted. The thickness of the transparent substrate can be measured using a Digimatic Standard Outside Micrometer (Mitutoyo Corporation, product number "MDC-25SX"), etc. The thickness of the transparent substrate should be the average value of measurements taken at any 10 points, which is the above-mentioned value. Preferred embodiments of the thickness range of the transparent substrate include 5 μm or more and 300 μm or less, 5 μm or more and 200 μm or less, 5 μm or more and 120 μm or less, 5 μm or more and 60 μm or less, 5 μm or more and 50 μm or less, 5 μm or more and 40 μm or less, 5 μm or more and 20 μm or more and 20 μm or more and 300 μm or less, 20 μm or more and 200 μm or less, 20 μm or more and 120 μm or less, 20 μm or more and 60 μm or less, 20 μm or more and 50 μm or less, 20 μm or more and 40 μm or less, 30 μm or more and 300 μm or less, 30 μm or more and 200 μm or less, 30 μm or more and 120 μm or less, 30 μm or more and 60 μm or less, 30 μm or more and 50 μm or less, and 30 μm or more and 40 μm or less.

[0017] In order to improve adhesion, the surface of the transparent substrate may be subjected to a physical treatment such as corona discharge treatment or a chemical treatment, or an easy-adhesion layer may be formed.

[0018] The substrate preferably has a total light transmittance according to JIS K7361-1:1997 of 70% or more, more preferably 80% or more, and even more preferably 85% or more. The substrate preferably has a haze according to JIS K7136:2000 of 10% or less, more preferably 5% or less, and even more preferably 3% or less.

[0019] <Uneven surface> The antiglare film of the present disclosure has an uneven surface. When there is no other layer on the antiglare layer, the surface of the antiglare layer may be an uneven surface. When there is another layer on the antiglare layer, the surface of the other layer may be an uneven surface.

[0020] <60 degree specular gloss, brightness variation coefficient> The antiglare film of the present disclosure is required to have a 60 degree specular gloss of 30.0 or less, measured from the side of the textured surface, and a coefficient of variation of brightness of 0.0400 or less.

[0021] If the 60 degree specular gloss of the antiglare film exceeds 30.0, the reflection of the background cannot be sufficiently suppressed, and the antiglare properties cannot be improved. The 60 degree specular gloss of the antiglare film is preferably 20.0 or less, more preferably 10.0 or less, and even more preferably 7.0 or less.

[0022] If the 60-degree specular gloss of the antiglare film is too low, the image light is likely to be scattered when passing through the antiglare film, and the darkroom contrast is likely to decrease. Therefore, the 60-degree specular gloss of the antiglare film is preferably 0.5 or more, more preferably 1.0 or more, and even more preferably 1.2 or more.

[0023] In this specification, when multiple options for the upper limit and the lower limit of a numerical value are shown, one selected from the upper limit options and one selected from the lower limit options can be combined to form an embodiment of a numerical range. For example, in the case of 60-degree specular gloss, embodiments of numerical ranges such as 0.5 to 30.0, 0.5 to 20.0, 0.5 to 10.0, 0.5 to 7.0, 1.0 to 30.0, 1.0 to 20.0, 1.0 to 10.0, 1.0 to 7.0, 1.2 to 30.0, 1.2 to 20.0, 1.2 to 10.0, and 1.2 to 7.0 can be mentioned.

[0024] In this specification, the 60 degree specular gloss and the 20 degree specular gloss refer to the specular gloss specified in JIS Z8741:1997. In this specification, the 60 degree specular gloss and 20 degree specular gloss are measured by preparing a sample by attaching a black plate to the opposite side of the uneven surface of the anti-glare film via a transparent adhesive layer, and measuring the uneven surface side of the sample. The refractive index difference between the layer in contact with the transparent adhesive layer of the sample and the transparent adhesive layer is preferably within 0.15, more preferably within 0.10, more preferably within 0.05, and more preferably within 0.01. Examples of the layer in contact with the transparent adhesive layer of the sample include a transparent substrate or an antiglare layer. The black plate preferably has a total light transmittance of 1% or less according to JIS K7361-1:1997, and more preferably 0%. The refractive index difference between the resin constituting the black plate and the transparent adhesive layer is preferably within 0.15, more preferably within 0.10, more preferably within 0.05, and more preferably within 0.01.

[0025] When the luminance variation coefficient of the antiglare film exceeds 0.0400, glare cannot be suppressed. The coefficient of variation of brightness of the antiglare film is preferably 0.0350 or less, more preferably 0.0280 or less, and even more preferably 0.0250 or less. If the coefficient of variation of the luminance of the antiglare film is too small, the antiglare property of the antiglare film may be extremely low, or conversely, the antiglare property of the antiglare film may be extremely high, resulting in a decrease in contrast. Therefore, the lower limit of the coefficient of variation of the luminance of the antiglare film is preferably 0.0050 or more, and more preferably 0.0100 or more. Preferred ranges of the luminance variation coefficient of the antiglare film include 0.0050 or more and 0.0400 or less, 0.0050 or more and 0.0350 or less, 0.0050 or more and 0.0280 or less, 0.0050 or more and 0.0250 or less, 0.0100 or more and 0.0400 or less, 0.0100 or more and 0.0350 or less, 0.0100 or more and 0.0280 or less, and 0.0100 or more and 0.0250 or less.

[0026] The coefficient of variation of the luminance of the antiglare film is calculated by the following measurement. (Measurement of the coefficient of variation of brightness) The surface of the anti-glare film opposite to the uneven surface is laminated on an image display device having a display element with a pixel density of 424 ppi. In a darkroom, the image of the image display device is displayed in green, and is photographed from the anti-glare film side with a CCD camera to obtain image data. The CCD camera has a pixel pitch of 5.5 μm×5.5 μm and a pixel count of 16 million pixels. The distance from the surface of the display element to the entrance pupil of the camera lens of the CCD camera is 500 mm. From the obtained image data, a region α of 128×128 pixels is extracted. The region α is subdivided into regions of 8×8 pixels each to obtain 256 small regions. In each small region, the luminance of each pixel of each small region is divided by the average luminance of all pixels of each small region to obtain a corrected luminance. The standard deviation of the corrected luminance of the 256 small regions is divided by the average value of the corrected luminance of the 256 small regions to calculate the luminance variation coefficient.

[0027] FIG. 2 is a schematic diagram for explaining an embodiment of the positional relationship between the image display device 120, the anti-glare film 100, and the CCD camera 300 when measuring the luminance variation coefficient. In FIG. 2, the surface of the anti-glare film opposite to the uneven surface is laminated onto the image display device 120. In FIG. 2, the surface of the anti-glare film facing the transparent substrate 10 corresponds to the surface of the anti-glare film opposite to the uneven surface. As shown in FIG. 2, it is preferable to laminate the image display device 120 and the anti-glare film 100 via a transparent adhesive medium 200. Examples of the layer structure of the transparent adhesive medium include a single layer of a transparent adhesive layer, and a laminated structure of a transparent adhesive layer, a transparent substrate, and a transparent adhesive layer. Examples of the transparent adhesive layer include a transparent pressure-sensitive adhesive layer (in other words, a transparent pressure-sensitive adhesive layer) and a transparent adsorption layer. The refractive index difference between the layer of the antiglare film in contact with the transparent adhesive medium and the interface with the transparent adhesive medium is preferably within 0.15, more preferably within 0.10, more preferably within 0.05, and more preferably within 0.01. Examples of the layer of the antiglare film in contact with the transparent adhesive medium include a transparent substrate or an antiglare layer. The refractive index difference between the interface with the transparent adhesive medium and the surface material of the image display device is preferably within 0.15, more preferably within 0.10, more preferably within 0.05, and more preferably within 0.01. Examples of the surface material of the image display device include a cover glass. When the transparent adhesive medium 200 has a laminated structure of two or more layers, an interface other than the above-mentioned interface is present between the layer of the antiglare film in contact with the transparent adhesive medium and the surface material of the image display device. In this case, the refractive index difference at interfaces other than the interfaces mentioned above is also preferably within 0.15, more preferably within 0.10, even more preferably within 0.05, and even more preferably within 0.01. An example of an image display device having a display element with a pixel density of 424 ppi is the product name "Xperia (registered trademark) Z5 E6653" manufactured by Sony Corporation. The image display device having a display element with a pixel density of 424 ppi is preferably an image display device having an RGB stripe type liquid crystal display element. 2, a CCD camera 300 is used in which a camera lens 32 is attached to a camera body 31. An example of such a CCD camera is a camera body (cooled CCD camera [product name "BU-63M" by Bitran Corporation, pixel pitch: 5.5 μm×5.5 μm, number of pixels: 16 million pixels, number of pixels: 4896×3264]) to which a camera lens (product name "AI AF Micro-Nikkor 60mm f / 2.8D" by Nikon Corporation) is attached. The image is captured in a darkroom environment with the image display device displaying green. When capturing the image, the distance from the surface of the display element to the entrance pupil of the camera lens of the CCD camera is 500 mm. When capturing the image, the focus of the CCD camera is adjusted to match the surface of the display element. The effective F-number of the CCD camera is preferably set to 36.4. In this specification, green display refers to display at the single maximum gradation ((R, G, B)=(0, 255, 0)) of the constituent primary colors of the display element. From the obtained image data, a region α of 128×128 pixels is extracted. The region α is divided into regions of 8×8 pixels each to obtain 256 small regions. In each small region, the luminance of each pixel in the small region is divided by the average luminance of all pixels in the small region to obtain a corrected luminance. The standard deviation of the corrected luminance of the 256 small regions is divided by the average luminance of the corrected luminance of the 256 small regions to calculate the luminance variation coefficient. There are no particular limitations on the position from which the region α is extracted from the 4896×3264 pixels, but it is preferable to extract it from the remaining 80% after removing 10% from each of the top, bottom, left and right of the 4896×3264 pixels. As described above, in the method for measuring the luminance variation coefficient of the present disclosure, the luminance of each pixel in each small region is divided by the average luminance of all pixels in each small region, so that the luminance unevenness specific to the display element can be corrected. Furthermore, in the method for measuring the luminance variation coefficient of the present disclosure, the standard deviation of the corrected luminance is divided by the average value of the corrected luminance, so that the method is not affected by the absolute value of the luminance specific to the display element. Note that the luminance variation coefficient of the present disclosure is a dimensionless value.

[0028] In order to make it easier to set the variation coefficients of the 60 degree specular gloss and brightness within the above ranges, it is preferable to set Δq and λq, which will be described later, within the ranges which will be described later.

[0029] In this specification, the variation coefficients of 60 degree specular gloss and brightness, as well as the 20 degree specular gloss, Δq, λq, haze and total light transmittance described below, refer to the average values ​​of measured values ​​at 16 points. In this specification, the 16 measurement points are preferably centered on 16 intersections of lines drawn on the inner area of ​​the margin, excluding a 1 cm area from the outer edge of the measurement sample, dividing the area inside the margin into 5 equal parts vertically and horizontally. For example, when the measurement sample is a rectangle, it is preferable to measure the 16 intersections of dotted lines excluding a 1 cm area from the outer edge of the rectangle, dividing the inner area inside the margin into 5 equal parts vertically and horizontally, and calculate the parameters using the average value. When the measurement sample is a shape other than a rectangle, such as a circle, an ellipse, a triangle, or a pentagon, it is preferable to draw a rectangle inscribed in these shapes and measure 16 points on the rectangle using the above method. The above-mentioned rectangle is preferably a rectangle. In the case of the luminance variation coefficient, the luminance variation coefficient is calculated for each point, and the average value of the luminance variation coefficients for the 16 points is set as the luminance variation coefficient for the sample.

[0030] In this specification, the coefficient of variation of 60-degree specular gloss and brightness, as well as various parameters such as 20-degree specular gloss, Δq, λq, haze, and total light transmittance described later, are measured at a temperature of 23±5°C and a relative humidity of 40% to 65%, unless otherwise specified. Furthermore, before the start of each measurement, the target sample is exposed to the above atmosphere for 30 minutes to 60 minutes before the measurement.

[0031] <20 degree specular gloss> The antiglare film of the present disclosure preferably has a 20-degree specular gloss measured from the uneven surface side of 6.0 or less, more preferably 3.0 or less, even more preferably 1.0 or less, and even more preferably 0.5 or less. By setting the 60-degree specular gloss in the above range and the 20-degree specular gloss to 6.0 or less, it is possible to easily achieve good antiglare properties in all directions.

[0032] If the 20-degree specular gloss of the antiglare film is too low, the image light is likely to be scattered when passing through the antiglare film, and the darkroom contrast is likely to decrease. Therefore, the 20-degree specular gloss of the antiglare film is preferably 0.01 or more, more preferably 0.02 or more, and even more preferably 0.04 or more. Preferred ranges of the 20 degree specular gloss of the antiglare film include 0.01 or more and 6.0 or less, 0.01 or more and 3.0 or less, 0.01 or more and 1.0 or less, 0.01 or more and 0.5 or less, 0.02 or more and 6.0 or less, 0.02 or more and 3.0 or less, 0.02 or more and 1.0 or less, 0.02 or more and 0.5 or less, 0.04 or more and 6.0 or less, 0.04 or more and 3.0 or less, 0.04 or more and 1.0 or less, and 0.04 or more and 0.5 or less.

[0033] <Δq, λq> In the antiglare film of the present disclosure, when the root mean square slope of the uneven surface is defined as Δq and the root mean square wavelength of the uneven surface is defined as λq, it is preferable that Δq is 0.250 μm / μm or more and λq is 17,000 μm or less. Δq correlates with the inclination angle of the uneven surface. More specifically, the larger Δq is, the larger the inclination angle of the uneven surface is. In addition, Δq is a square parameter, so it is a parameter that strongly reflects the inclination angle that is larger than the average inclination angle. Therefore, Δq is a parameter that is different from the average inclination angle, which is a parameter that simply averages all the inclinations. λq correlates with the spacing between the projections and recesses on the uneven surface. More specifically, the smaller λq is, the narrower the spacing between the projections and recesses on the uneven surface. λq is a parameter calculated from the square parameters Δq and Rq, as shown in formula (A) described below. For this reason, λq is a parameter that strongly reflects the spacing between projections and recesses that have a large height difference and a large inclination angle. Therefore, λq is a parameter that differs from JIS RSm, which is a parameter that averages the spacing between all projections and recesses. Therefore, an uneven surface with Δq of 0.250 μm / μm or more and λq of 17,000 μm or less means that unevenness with a large inclination angle exists at narrow intervals. When unevenness with a large inclination angle exists at narrow intervals like this, it is considered that the variation coefficients of the 60 degree specular gloss, the 20 degree specular gloss, and the brightness can be easily set in the above-mentioned ranges mainly for the reasons (1)-(7) below. In particular, by reducing λq, it is easy to impart a jet black feel to the antiglare film. The reason why it is easy to impart a jet black feel to the antiglare film by reducing λq is considered to be as follows. Specular gloss represents the magnitude of the light intensity in the direction of regular reflection. Therefore, even if the light intensity in the direction of regular reflection is low and the specular gloss is low, if the light intensity in directions other than the direction of regular reflection is not low, a jet-black feeling cannot be imparted. By reducing λq, the effects of (1)-(5) below can be strengthened, making it difficult for the observer to sense the reflected scattered light, which is thought to make it easier to impart a jet-black feeling.

[0034] When unevenness with large inclination angles is present at closely spaced intervals, it is believed that the 60 degree specular gloss and 20 degree specular gloss can be easily brought into the above-mentioned ranges mainly for the reasons (1) to (5) below. (1) Because the distance between adjacent mountains is short, most of the light reflected from the surface of any mountain is incident on the adjacent mountain. Then, the light is totally reflected inside the adjacent mountain and finally travels in the opposite direction from the observer 700 (image of the solid line in Figure 3). (2) The reflected light of light incident on the steep slope of any mountain travels in the opposite direction to the observer 700, regardless of whether it is an adjacent mountain (as shown by the dashed line in Figure 3). (3) Since the distance between adjacent mountains is short, there are few approximately flat areas that generate specularly reflected light. (4) Light reflected from a small proportion of approximately flat areas is likely to collide with adjacent mountains, and as a result, the angular distribution of light reflected from approximately flat areas is not biased toward a specific angle, but is approximately uniform. (5) The reflected light of light incident on the gentle slope of any mountain travels toward the observer 700 (illustration of the dashed line in FIG. 3). However, the gentle slope of a mountain also has a certain angular distribution, and the angular distribution is evenly distributed within the gentle angle range. Therefore, the angular distribution of the reflected light of light incident on a gentle slope is not biased toward a specific angle.

[0035] From the above (1) to (3), it is believed that reflected and scattered light can be suppressed, the 60 degree specular gloss and the 20 degree specular gloss can be set within the above-mentioned ranges, and thus the antiglare properties can be improved. Furthermore, because of the above (4) and (5), even if a small amount of reflected scattered light occurs, the angular distribution of the reflected scattered light can be made uniform. Even if the amount of reflected scattered light is small, if the angular distribution of the reflected scattered light is biased toward a specific angle, it will be recognized as reflected light. Therefore, because of the above (4) and (5), the antiglare properties can be made extremely good. In addition, because of the above (1)-(5), the observer can perceive almost no reflected scattered light, which gives the antiglare film a jet-black appearance and ultimately imparts a sense of luxury to the image display device.

[0036] When concaves and convexes with large inclination angles are present at close intervals, it is believed that the luminance variation coefficient can be easily brought into the above-mentioned range mainly for the reasons (6)-(7) below. (6) The reason why the value of the luminance variation coefficient becomes large is believed to be that the uneven surface acts like a lens, causing the image light to be locally focused. This phenomenon is likely to occur when the interval between the unevennesses on the uneven surface is equal to or greater than the pixel interval of the display element. For this reason, it is believed that the existence of narrowly spaced unevennesses on the uneven surface makes it easier to keep the luminance variation coefficient within the above-mentioned range. (7) When the inclination angle of the uneven surface is small, the uneven surface is approximated to a part of a circle, and image light is easily condensed. On the other hand, when the inclination angle of the uneven surface is large, the uneven surface is approximated to a part of an ellipse, and image light is difficult to condense. For this reason, it is believed that a large inclination angle of the uneven surface makes it easier to keep the brightness variation coefficient within the above-mentioned range. It is believed that the above effects of (6) and (7) act synergistically to make it easier to keep the luminance variation coefficient within the above-mentioned range. For this reason, it is preferable that the shape of the uneven surface has Δq of 0.250 μm / μm or more and λq of 17.000 μm or less.

[0037] Δq is more preferably 0.275 μm / μm or more, more preferably 0.300 μm / μm or more, more preferably 0.325 μm / μm or more, more preferably 0.350 μm / μm or more, more preferably 0.400 μm / μm or more, and more preferably 0.485 μm / μm or more. If Δq is too large, the image light is likely to be scattered when passing through the antiglare film, and the darkroom contrast is likely to decrease. Also, if Δq is too large, the reflectance of the image light is high, and the transmittance of the image light is likely to decrease. Therefore, Δq is preferably 0.800 μm / μm or less, more preferably 0.700 μm / μm or less, and even more preferably 0.600 μm / μm or less. The preferable range of Δq of the uneven surface is 0.250 μm / μm or more and 0.800 μm / μm or less, 0.250 μm / μm or more and 0.700 μm / μm or less, 0.250 μm / μm or more and 0.600 μm / μm or less, 0.275 μm / μm or more and 0.800 μm / μm or less, 0.275 μm / μm or more and 0.700 μm / μm or less. m / μm or less, 0.275μm / μm or more and 0.600μm / μm or less, 0.300μm / μm or more and 0.800μm / μm or less, 0.300μm / μm or more 0.700μm / μm or less, 0.300μm / μm or more and 0.600μm / μm or less, 0.325μm / μm or more and 0.800μm / μm or less, 0.325μm m / μm or more and 0.700μm / μm or less, 0.325μm / μm or more and 0.600μm / μm or less, 0.350μm / μm or more and 0.800μm / μm or less , 0.350μm / μm or more and 0.700μm / μm or less, 0.350μm / μm or more and 0.600μm / μm or less, 0.400μm / μm or more and 0.800μm m / μm or less, 0.400μm / μm or more and 0.700μm / μm or less, 0.400μm / μm or more and 0.600μm / μm or less, 0.485μm / μm or more Examples include 0.800 μm / μm or less, 0.485 μm / μm or more and 0.700 μm / μm or less, and 0.485 μm / μm or more and 0.600 μm / μm or less.

[0038] λq is more preferably 16.520 μm or less, more preferably 16.000 μm or less, more preferably 14.000 μm or less, and more preferably 12.000 μm or less. If λq is too small, the image light is likely to be scattered when passing through the antiglare film, and the darkroom contrast is likely to decrease. Therefore, λq is preferably 3,000 μm or more, more preferably 5,000 μm or more, and even more preferably 7,000 μm or more. Preferred ranges of λq of the uneven surface are 3.000 μm or more and 17.000 μm or less, 3.000 μm or more and 16.520 μm or less, 3.000 μm or more and 16.000 μm or less, 3.000 μm or more and 14.000 μm or less, 3.000 μm or more and 12.000 μm or less, 5.000 μm or more and 17.000 μm or less, 5.000 μm or more and 16.520 μm or less, 5.0 Examples of the thickness include 00 μm or more and 16,000 μm or less, 5.000 μm or more and 14.000 μm or less, 5.000 μm or more and 12.000 μm or less, 7.000 μm or more and 17.000 μm or less, 7.000 μm or more and 16.520 μm or less, 7.000 μm or more and 16.000 μm or less, 7.000 μm or more and 14.000 μm or less, and 7.000 μm or more and 12.000 μm or less.

[0039] <rq> In order to achieve good antiglare properties, the antiglare film of the present disclosure preferably has an Rq of the uneven surface of 0.300 μm or more, more preferably 0.350 μm or more, and even more preferably 0.400 μm or more. If Rq is too large, the unevenness difference of the uneven surface becomes too large, and the uneven surface becomes easily damaged. The parts of the uneven surface that are scratched by friction objects are mainly near the convex parts, and the areas near the high convex parts are particularly prone to damage. In particular, if Rq is large and λq is large, the areas near the high convex parts are more likely to be loaded. For this reason, Rq is preferably 1.000 μm or less, more preferably 0.900 μm or less, more preferably 0.800 μm or less, and even more preferably 0.720 μm or less. Preferred ranges for Rq of the uneven surface include 0.300 μm or more and 1.000 μm or less, 0.300 μm or more and 0.900 μm or less, 0.300 μm or more and 0.800 μm or less, 0.300 μm or more and 0.720 μm or less, 0.350 μm or more and 1.000 μm or less, 0.350 μm or more and 0.900 μm or less, 0.350 μm or more and 0.800 μm or less, 0.350 μm or more and 0.720 μm or less, 0.400 μm or more and 1.000 μm or less, 0.400 μm or more and 0.900 μm or less, 0.400 μm or more and 0.800 μm or less, and 0.400 μm or more and 0.720 μm or less.

[0040] In this specification, Δq means a three-dimensional extension of the "root mean square slope RΔq of the roughness curve" defined in JIS B0601:2001. In this specification, Rq means the three-dimensional extension of the "root mean square height Rq of the roughness curve" defined in JIS B0601:2001. In this specification, λq means one represented by the following formula (A) using Δq and Rq. λq=2 1.5 π(Rq / Δq) (A)

[0041] It is preferable to measure Δq, Rq, and λq using an interference microscope. Examples of interference microscopes include the "New View" series by Zygo. By using the measurement and analysis application software "MetroPro" that comes with the "New View" series, Δq, Rq, and λq can be easily calculated. When measuring Δq, Rq and λq using the aforementioned "New View" series, the measurement conditions are preferably in accordance with the conditions described in the Examples. For example, the Filter Low Wavelen (corresponding to λc in JIS B0601) is preferably 800 μm. That is, it is preferable that Δq, Rq and λq are measured by an interference microscope with the value corresponding to λc in JIS B0601 set to 800 μm. The Camera Res (resolution) is preferably 0.3 μm or more and 0.5 μm or less, and more preferably 0.44 μm.

[0042] <Anti-glare layer> The antiglare layer suppresses reflected and scattered light and is a layer that plays a central role in providing antiglare properties.

[0043] <<Method for forming anti-glare layer>> The antiglare layer can be formed by, for example, (A) shaping with an embossing roll, (B) etching treatment, (C) molding with a mold, (D) formation of a coating film by coating, etc. Among these methods, (C) molding with a mold is preferred in order to easily obtain a stable surface shape, and (D) formation of a coating film by coating is preferred in terms of productivity and compatibility with a wide variety of products. When forming a coating film (antiglare layer) by the method of (D), for example, (d1) a method of applying a coating liquid containing a binder resin and particles to form unevenness by the particles, and (d2) a method of applying a coating liquid containing an arbitrary resin and a resin having poor compatibility with the resin to cause phase separation of the resin to form unevenness. The method of (D) may be either (d1) or (d2), but (d1) is preferred over (d2) in that it is easier to control Δq, λq, and Rq.

[0044] Thickness The thickness T of the antiglare layer is preferably from 2 to 10 μm, more preferably from 4 to 8 μm, in order to achieve a good balance between curl suppression, mechanical strength, hardness and toughness. The thickness of the antiglare layer can be calculated, for example, by averaging 20 arbitrary points selected from a cross-sectional photograph of the antiglare film taken by a scanning transmission electron microscope (STEM). The acceleration voltage of the STEM is preferably 10 kV to 30 kV, and the magnification of the STEM is preferably 1000 times to 7000 times. Preferred embodiments of the thickness of the antiglare layer include from 2 μm to 10 μm, from 2 μm to 8 μm, from 4 μm to 10 μm, and from 4 μm to 8 μm.

[0045] "component" The antiglare layer mainly contains a resin component, and optionally contains additives such as particles such as organic particles and inorganic fine particles, a refractive index adjuster, an antistatic agent, an antifouling agent, an ultraviolet absorber, a light stabilizer, an antioxidant, a viscosity adjuster, and a thermal polymerization initiator.

[0046] The antiglare layer preferably contains a binder resin and particles. The particles include organic particles and inorganic particles, and inorganic particles are preferred. That is, the antiglare layer more preferably contains a binder resin and inorganic particles. Furthermore, the antiglare layer further preferably contains a binder resin, inorganic particles, and organic particles.

[0047] -particle- Examples of organic particles include particles made of polymethyl methacrylate, polyacrylic-styrene copolymer, melamine resin, polycarbonate, polystyrene, polyvinyl chloride, benzoguanamine-melamine-formaldehyde condensate, silicone, fluorine-based resin, and polyester-based resin. Examples of inorganic particles include silica, alumina, zirconia, and titania, and silica is preferred. Among inorganic particles, amorphous inorganic particles are preferred, and amorphous silica is more preferred. By using amorphous inorganic particles such as amorphous silica as the particles, it becomes easier to form steep unevenness, which makes it easier to increase Δq. When using amorphous inorganic particles such as amorphous silica as particles, it is preferable to increase the content of the amorphous inorganic particles in the antiglare layer in order to make it easier to set Δq and λq within the above-mentioned range. By increasing the content of the amorphous inorganic particles in the antiglare layer, the amorphous inorganic particles are spread over the entire surface, making it easier to reduce λq. Furthermore, by adding organic particles in addition to the amorphous inorganic particles, extreme aggregation of the amorphous inorganic particles is suppressed, and a narrow unevenness interval can be maintained, making λq smaller. The mass ratio of the amorphous inorganic particles to the organic particles is preferably 5:1-1:1, more preferably 4:1-2:1. When organic particles are used as the particles, in order to easily set Δq and λq within the above-mentioned ranges, the antiglare layer preferably contains inorganic fine particles, which will be described later.

[0048] The average particle size D of particles such as organic particles and inorganic particles is preferably 1.0 μm or more and 10.0 μm or less, more preferably 1.5 μm or more and 8.0 μm or less, and even more preferably 1.7 μm or more and 6.0 μm or less. By making the average particle diameter D 1.0 μm or more, it is easy to increase Rq. Among particles, amorphous inorganic particles tend to increase Δq and Rq. By making the average particle diameter D 10.0 μm or less, it is easy to reduce λq and to prevent Δq and Rq from becoming too large. Preferred embodiments of the average particle size range of the particles include 1.0 μm or more and 10.0 μm or less, 1.0 μm or more and 8.0 μm or less, 1.0 μm or more and 6.0 μm or less, 1.5 μm or more and 10.0 μm or less, 1.5 μm or more and 8.0 μm or less, 1.5 μm or more and 6.0 μm or less, 1.7 μm or more and 10.0 μm or less, 1.7 μm or more and 8.0 μm or less, and 1.7 μm or more and 6.0 μm or less.

[0049] The average particle size of particles such as organic particles and inorganic particles can be calculated by the following steps (A1) to (A3). (A1) The antiglare film is observed through a transmission optical microscope at a magnification of preferably 500 to 2000 times. (A2) Randomly extract 10 particles from the observed image, and calculate the particle diameter of each particle. The particle diameter is measured as the distance between two parallel lines that is the maximum distance between the two lines when the cross section of the particle is sandwiched between the two lines. (A3) The same procedure is carried out five times on a separate observation image of the same sample, and the value obtained from the number average of the particle diameters of a total of 50 particles is regarded as the average particle diameter of the particles. When the particles are amorphous inorganic particles, the average particle size can be measured as a volume average particle size by laser diffraction method.

[0050] The ratio D / T of the thickness T of the antiglare layer to the average particle diameter D of the particles is preferably 0.20 to 0.96, more preferably 0.25 to 0.90, even more preferably 0.30 to 0.80, and even more preferably 0.35 to 0.70. By setting D / T in the above range, it becomes easier to set the height and spacing of the peaks of the uneven surface in an appropriate range, and it becomes easier to set Δq, λq, and Rq in the above ranges. By setting D / T to 0.96 or less, it becomes easier to prevent Rq from becoming too large. Preferred embodiments of the range of D / T include 0.20 or more and 0.96 or less, 0.20 or more and 0.90 or less, 0.20 or more and 0.80 or less, 0.20 or more and 0.70 or less, 0.25 or more and 0.96 or less, 0.25 or more and 0.90 or less, 0.25 or more and 0.80 or less, 0.25 or more and 0.70 or less, 0.30 or more and 0.96 or less, 0.30 or more and 0.90 or less, 0.30 or more and 0.80 or less, 0.30 or more and 0.70 or less, 0.35 or more and 0.96 or less, 0.35 or more and 0.90 or less, 0.35 or more and 0.80 or less, and 0.35 or more and 0.70 or less.

[0051] The content of particles such as organic particles and inorganic particles is preferably 10 parts by mass or more and 200 parts by mass or less, more preferably 15 parts by mass or more and 170 parts by mass or less, and even more preferably 20 parts by mass or more and 150 parts by mass or less, relative to 100 parts by mass of the binder resin. By setting the particle content to 10 parts by mass or more, Δq and Rq can be easily increased and λq can be easily decreased. By setting the particle content to 200 parts by mass or less, it is possible to easily suppress the particles from falling off from the antiglare layer. When organic particles are used as particles and amorphous inorganic particles are not used, the content of the particles is preferably relatively large within the above range in order to easily realize "particle packing" and "particle stacking". When amorphous inorganic particles are used as particles, the content of the particles is preferably relatively small within the above range in order to prevent Δq and Rq from becoming too large. Preferred embodiments of the particle content per 100 parts by mass of binder resin include 10 parts by mass or more and 200 parts by mass or less, 10 parts by mass or more and 170 parts by mass or less, 10 parts by mass or more and 150 parts by mass or less, 15 parts by mass or more and 200 parts by mass or less, 15 parts by mass or more and 170 parts by mass or less, 15 parts by mass or more and 150 parts by mass or less, 20 parts by mass or more and 200 parts by mass or less, 20 parts by mass or more and 170 parts by mass or less, and 20 parts by mass or more and 150 parts by mass or less.

[0052] -Inorganic fine particles- The antiglare layer preferably further contains inorganic fine particles in addition to the binder resin and the particles. In this specification, the inorganic fine particles can be distinguished from the above-mentioned particles by the average particle diameter. When the antiglare layer contains inorganic fine particles, fine unevenness is formed between the peaks of the uneven surface, which makes it easier to reduce the regular reflection light. Furthermore, when the antiglare layer contains inorganic fine particles, the difference between the refractive index of the particles and the refractive index of the composition other than the particles in the antiglare layer becomes smaller, which makes it easier to reduce the internal haze. Furthermore, when the antiglare layer contains inorganic fine particles, the viscosity of the antiglare layer coating solution can be increased, so that the particles are less likely to sink. Therefore, when the antiglare layer contains inorganic fine particles, it is easier to increase Δq and reduce λq. When the antiglare layer contains inorganic fine particles, the particles are preferably organic particles.

[0053] Examples of inorganic fine particles include fine particles made of silica, alumina, zirconia, titania, etc. Among these, silica is preferable because it is easy to suppress the generation of internal haze.

[0054] The average particle size of the inorganic fine particles is preferably from 1 nm to 200 nm, more preferably from 2 nm to 100 nm, and even more preferably from 5 nm to 50 nm. Preferred embodiments of the average particle diameter of inorganic microparticles include 1 nm or more and 200 nm or less, 1 nm or more and 100 nm or less, 1 nm or more and 50 nm or less, 2 nm or more and 200 nm or less, 2 nm or more and 100 nm or less, 2 nm or more and 50 nm or less, 5 nm or more and 200 nm or less, 5 nm or more and 100 nm or less, and 5 nm or more and 50 nm or less.

[0055] The average particle size of the inorganic fine particles can be calculated by the following steps (B1) to (B3). (B1) The cross section of the antiglare film is imaged by TEM or STEM. The acceleration voltage of the TEM or STEM is preferably 10 kV to 30 kV, and the magnification is preferably 50,000 to 300,000. (B2) Randomly extract 10 inorganic particles from the observed image, and calculate the particle diameter of each inorganic particle. The particle diameter is measured as the distance between two parallel lines that is the maximum distance between the two lines when the cross section of the inorganic particle is sandwiched between the two lines. (B3) The same procedure is repeated five times on a separate observation image of the same sample, and the value obtained from the number average of the particle sizes of a total of 50 particles is regarded as the average particle size of the inorganic fine particles.

[0056] The content of the inorganic fine particles is preferably 10 parts by mass or more and 200 parts by mass or less, more preferably 15 parts by mass or more and 150 parts by mass or less, and even more preferably 20 parts by mass or more and 80 parts by mass or less, relative to 100 parts by mass of the binder resin. By making the content of inorganic fine particles 10 parts by mass or more, it is possible to easily obtain the above-mentioned effects based on the inorganic fine particles. By making the content of inorganic fine particles 200 parts by mass or less, it is possible to easily suppress the decrease in the coating strength of the antiglare layer, and also to suppress the inhibition of the fluidity of the particles, and it is possible to easily make Δq, λq, and Rq within the above-mentioned ranges. Preferred embodiments of the content of inorganic fine particles per 100 parts by mass of binder resin include 10 parts by mass or more and 200 parts by mass or less, 10 parts by mass or more and 150 parts by mass or less, 10 parts by mass or more and 80 parts by mass or less, 15 parts by mass or more and 200 parts by mass or less, 15 parts by mass or more and 150 parts by mass or less, 15 parts by mass or more and 80 parts by mass or less, 20 parts by mass or more and 200 parts by mass or less, 20 parts by mass or more and 150 parts by mass or less, and 20 parts by mass or more and 80 parts by mass or less.

[0057] - Binder resin - In order to improve mechanical strength, the binder resin preferably contains a cured product of a curable resin such as a cured product of a thermosetting resin composition or a cured product of an ionizing radiation curable resin composition, and more preferably contains a cured product of an ionizing radiation curable resin composition.

[0058] The thermosetting resin composition is a composition that contains at least a thermosetting resin, and is a resin composition that is cured by heating. Examples of the thermosetting resin include acrylic resin, urethane resin, phenol resin, urea melamine resin, epoxy resin, unsaturated polyester resin, silicone resin, etc. In the thermosetting resin composition, a curing agent is added to the curable resin as required.

[0059] The ionizing radiation curable resin composition is a composition containing a compound having an ionizing radiation curable functional group (hereinafter, also referred to as "ionizing radiation curable compound"). Examples of the ionizing radiation curable functional group include ethylenically unsaturated bond groups such as (meth)acryloyl group, vinyl group, and allyl group, as well as epoxy group and oxetanyl group. As the ionizing radiation curable compound, a compound having an ethylenically unsaturated bond group is preferred, a compound having two or more ethylenically unsaturated bond groups is more preferred, and among them, a polyfunctional (meth)acrylate-based compound having two or more ethylenically unsaturated bond groups is even more preferred. As the polyfunctional (meth)acrylate-based compound, either a monomer or an oligomer can be used. Ionizing radiation refers to electromagnetic waves or charged particle beams that have an energy quantum capable of polymerizing or crosslinking molecules. Usually, ultraviolet (UV) rays or electron beams (EB) are used, but other types of electromagnetic waves such as X-rays and gamma rays, as well as charged particle beams such as alpha rays and ion beams can also be used.

[0060] Among the polyfunctional (meth)acrylate compounds, examples of bifunctional (meth)acrylate monomers include ethylene glycol di(meth)acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, and 1,6-hexanediol diacrylate. Examples of trifunctional or higher (meth)acrylate monomers include trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol tetra(meth)acrylate, and isocyanuric acid-modified tri(meth)acrylate. The (meth)acrylate monomer may have a part of its molecular skeleton modified, for example, with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol, or the like.

[0061] Examples of the polyfunctional (meth)acrylate oligomer include acrylate polymers such as urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, and polyether (meth)acrylate. The urethane (meth)acrylate can be obtained, for example, by reacting a polyhydric alcohol and an organic diisocyanate with a hydroxy (meth)acrylate. Preferred epoxy (meth)acrylates are (meth)acrylates obtained by reacting a tri- or higher functional aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like, with (meth)acrylic acid, (meth)acrylates obtained by reacting a di- or higher functional aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like, with a polybasic acid and (meth)acrylic acid, and (meth)acrylates obtained by reacting a di- or higher functional aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like, with a phenol and (meth)acrylic acid.

[0062] A monofunctional (meth)acrylate may be used in combination as an ionizing radiation curable compound for the purpose of adjusting the viscosity of the antiglare layer coating solution, etc. Examples of the monofunctional (meth)acrylate include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate, and isobornyl (meth)acrylate. The above ionizing radiation curable compounds may be used alone or in combination of two or more.

[0063] When the ionizing radiation curable compound is an ultraviolet ray curable compound, the ionizing radiation curable composition preferably contains additives such as a photopolymerization initiator and a photopolymerization accelerator. The photopolymerization initiator may be one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzyl dimethyl ketal, benzoyl benzoate, α-acyloxime ester, thioxanthones, and the like. The photopolymerization accelerator can reduce the inhibition of polymerization caused by air during curing and increase the curing speed. Examples of the accelerator include p-dimethylaminobenzoic acid isoamyl ester and p-dimethylaminobenzoic acid ethyl ester.

[0064] When the binder resin contains a cured product of an ionizing radiation curable resin composition, it preferably has the following structure (C1) or (C2).

[0065] The (C1) binder resin contains a thermoplastic resin in addition to a cured product of an ionizing radiation curable resin composition. (C2) The binder resin substantially contains only a cured product of an ionizing radiation curable resin composition, and the ionizing radiation curable compound contained in the ionizing radiation curable resin composition contains 70 mass% or more of a monomer component.

[0066] In the case of the embodiment C1, the viscosity of the antiglare layer coating solution is increased by the thermoplastic resin, so that the particles are less likely to sink, and furthermore, the binder resin is less likely to flow down between the peaks. Therefore, in the case of the embodiment C1, it is easy to increase Δq and reduce λq. In the embodiment C1, it is preferable that the antiglare layer contains inorganic fine particles, because the viscosity of the antiglare layer coating solution can be increased by the inorganic fine particles. In the above embodiment C1, it is preferable that organic particles are used as the particles and inorganic fine particles are also contained.

[0067] Examples of thermoplastic resins include polystyrene-based resins, polyolefin-based resins, ABS resins (including heat-resistant ABS resins), AS resins, AN resins, polyphenylene oxide-based resins, polycarbonate-based resins, polyacetal-based resins, acrylic-based resins, polyethylene terephthalate-based resins, polybutylene terephthalate-based resins, polysulfone-based resins, and polyphenylene sulfide-based resins, with acrylic resins being preferred in order to improve transparency.

[0068] The weight average molecular weight of the thermoplastic resin is preferably from 20,000 to 200,000, more preferably from 30,000 to 150,000, and even more preferably from 50,000 to 100,000. In this specification, the weight average molecular weight is an average molecular weight measured by GPC analysis and converted into standard polystyrene. Preferred embodiments of the weight average molecular weight of the thermoplastic resin include 20,000 or more and 200,000 or less, 20,000 or more and 150,000 or less, 20,000 or more and 100,000 or less, 30,000 or more and 200,000 or less, 30,000 or more and 150,000 or less, 30,000 or more and 100,000 or less, 50,000 or more and 200,000 or less, 50,000 or more and 150,000 or less, and 50,000 or more and 100,000 or less.

[0069] In the above embodiment C1, the mass ratio of the cured product of the ionizing radiation curable resin composition to the thermoplastic resin is preferably 60:40-90:10, and more preferably 70:30-80:20. By making the ratio of the thermoplastic resin to the cured product of the ionizing radiation curable resin composition 90 or more, the effect of increasing the viscosity of the antiglare layer coating liquid described above can be easily achieved. By making the ratio of the thermoplastic resin to the cured product of the ionizing radiation curable resin composition 60 or less, it is possible to easily prevent the mechanical strength of the antiglare layer from decreasing.

[0070] In the case of the embodiment C2, the particles are spread out on the bottom of the antiglare layer, and in some areas the particles are stacked, and these particles tend to be covered with a thin-skin-like binder resin. Therefore, in the case of the embodiment C2, the stacked particles can easily increase Δq, and the spread particles can easily decrease λq. In the embodiment of C2, the particles are preferably inorganic particles, more preferably amorphous inorganic particles, and even more preferably amorphous silica. Also, in the embodiment of C2, it is preferable to include organic particles in addition to the inorganic particles.

[0071] In the above C2, the proportion of the cured product of the ionizing radiation curable resin composition relative to the total amount of the binder resin is preferably 90% by mass or more, more preferably 95% by mass or more, and even more preferably 100% by mass. In the above C2, the ratio of the monomer component to the total amount of the ionizing radiation curable compound is preferably 70% by mass or more, and more preferably 75% by mass or more. The monomer component is preferably a polyfunctional (meth)acrylate compound.

[0072] The coating solution for the antiglare layer preferably contains a solvent to adjust the viscosity and to make each component soluble or dispersible. Since the surface shape of the antiglare layer after coating and drying varies depending on the type of solvent, it is preferable to select the solvent in consideration of the saturated vapor pressure of the solvent, the permeability of the solvent into the transparent substrate, etc. Examples of the solvent include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; ethers such as dioxane and tetrahydrofuran; aliphatic hydrocarbons such as hexane; alicyclic hydrocarbons such as cyclohexane; aromatic hydrocarbons such as toluene and xylene; halogenated carbons such as dichloromethane and dichloroethane; esters such as methyl acetate, ethyl acetate, and butyl acetate; alcohols such as isopropanol, butanol, and cyclohexanol; cellosolves such as methyl cellosolve and ethyl cellosolve; glycol ethers such as propylene glycol monomethyl ether acetate; cellosolve acetates; sulfoxides such as dimethyl sulfoxide; amides such as dimethylformamide and dimethylacetamide; etc. The solvent may be used alone or in a mixture of two or more kinds.

[0073] The solvent in the coating solution for the antiglare layer is preferably a solvent with a fast evaporation rate as a main component. By increasing the evaporation rate of the solvent, the particles are prevented from settling to the bottom of the antiglare layer, and the binder resin is also prevented from flowing down between the peaks. This makes it easier to increase Δq and reduce λq. The term "main component" means that the solvent accounts for 50% by mass or more of the total amount of the solvent, preferably 70% by mass or more, and more preferably 80% by mass or more.

[0074] In this specification, a solvent having a fast evaporation rate means a solvent having an evaporation rate of 100 or more, where the evaporation rate of butyl acetate is taken as 100. The evaporation rate of a solvent having a fast evaporation rate is more preferably 120 or more and 300 or less, and even more preferably 150 or more and 220 or less. Examples of solvents with a fast evaporation rate include methyl isobutyl ketone with an evaporation rate of 160, toluene with an evaporation rate of 200, and methyl ethyl ketone with an evaporation rate of 370.

[0075] The solvent in the antiglare layer coating solution preferably contains a small amount of a solvent with a slow evaporation rate in addition to the solvent with a fast evaporation rate. By containing a small amount of the solvent with a slow evaporation rate, the particles can be aggregated, and Δq and Rq can be easily increased. However, in order to prevent Rq from becoming too large, it is important to keep the content of the solvent with a slow evaporation rate small. The mass ratio of the fast evaporating solvent to the slow evaporating solvent is preferably 99:1-80:20, and more preferably 98:2-85:15.

[0076] In this specification, a solvent having a slow evaporation rate means a solvent having an evaporation rate of less than 100, where the evaporation rate of butyl acetate is taken as 100. The evaporation rate of a solvent having a slow evaporation rate is more preferably 20 or more and 60 or less, and even more preferably 25 or more and 40 or less. Examples of solvents with slow evaporation rates include cyclohexanone with an evaporation rate of 32 and propylene glycol monomethyl ether acetate with an evaporation rate of 44.

[0077] When forming an antiglare layer from the antiglare layer coating liquid, it is preferable to control the drying conditions. The drying conditions can be controlled by the drying temperature and the wind speed in the dryer. The drying temperature is preferably 30° C. or higher and 120° C. or lower, and the drying wind speed is preferably 0.2 m / s or higher and 50 m / s or lower. In order to control the surface shape of the antiglare layer by drying, it is preferable to irradiate the antiglare layer with ionizing radiation after drying the coating solution.

[0078] <Optical properties> The antiglare film preferably has a total light transmittance according to JIS K7361-1:1997 of 70% or more, more preferably 80% or more, and even more preferably 85% or more. The light incident surface when measuring the total light transmittance and the haze described below is the side opposite to the uneven surface.

[0079] The antiglare film preferably has a haze according to JIS K7136:2000 of 20% or more and 98% or less, more preferably 30% or more and 98% or less, even more preferably 40% or more and 98% or less, even more preferably 50% or more and 80% or less, and even more preferably 55% or more and 70% or less. By setting the haze to 20% or more, it is possible to easily improve the antiglare properties. In order to easily improve the antiglare properties, the haze is preferably 40% or more. By setting the haze to 98% or less, it is possible to easily suppress the decrease in image resolution. Preferred ranges for the haze of the anti-glare film include 20% or more and 98% or less, 20% or more and 80% or less, 20% or more and 70% or less, 30% or more and 98% or less, 30% or more and 80% or less, 30% or more and 70% or less, 40% or more and 98% or less, 40% or more and 80% or less, 40% or more and 70% or less, 50% or more and 98% or less, 50% or more and 80% or less, 50% or more and 70% or less, 55% or more and 98% or less, 55% or more and 80% or less, and 55% or more and 70% or less.

[0080] In order to facilitate good image resolution and contrast, the antiglare film preferably has an internal haze of 20% or less, more preferably 15% or less, and even more preferably 10% or less. The internal haze can be measured by a general-purpose method, for example, by laminating a transparent sheet onto the uneven surface via a transparent adhesive layer to eliminate the unevenness of the uneven surface, thereby measuring the internal haze.

[0081] The anti-glare film has a transmitted image clarity of C when the optical comb width is 0.125 mm, measured in accordance with JIS K7374:2007. 0.125 , the transmitted image clarity when the optical comb width is 0.25 mm is C 0.25 , the transmitted image clarity when the optical comb width is 0.5 mm is C 0.5 , the transmitted image clarity when the optical comb width is 1.0 mm is C 1.0 , the transmitted image clarity when the optical comb width is 2.0 mm is C 2.0 When we define 0.125 , C 0.25 , C 0.5 , C 1.0 and C 2.0 It is preferable that the value is in the following range: C 0.125 In order to improve the antiglare property, it is preferably 50% or less, more preferably 40% or less, still more preferably 30% or less, and still more preferably 20% or less. 0.125 is preferably 1.0% or more to improve the resolution. 0.125 Examples of the range include 1.0% or more and 50% or less, 1.0% or more and 40% or less, 1.0% or more and 30% or less, and 1.0% or more and 20% or less. C 0.25 In order to improve the antiglare property, it is preferably 50% or less, more preferably 40% or less, still more preferably 30% or less, and still more preferably 20% or less. 0.25 is preferably 1.0% or more to improve the resolution. 0.25 Examples of the range include 1.0% or more and 50% or less, 1.0% or more and 40% or less, 1.0% or more and 30% or less, and 1.0% or more and 20% or less. C 0.5 In order to improve the antiglare property, it is preferably 50% or less, more preferably 40% or less, still more preferably 30% or less, and still more preferably 20% or less. 0.5 is preferably 1.0% or more to improve the resolution. 0.5 Examples of the range include 1.0% or more and 50% or less, 1.0% or more and 40% or less, 1.0% or more and 30% or less, and 1.0% or more and 20% or less. C 1.0 In order to improve the antiglare property, it is preferably 50% or less, more preferably 40% or less, still more preferably 30% or less, and still more preferably 20% or less. 1.0 is preferably 1.0% or more to improve the resolution. 1.0 Examples of the range include 1.0% or more and 50% or less, 1.0% or more and 40% or less, 1.0% or more and 30% or less, and 1.0% or more and 20% or less. C 2.0 In order to improve the antiglare property, it is preferably 50% or less, more preferably 40% or less, still more preferably 30% or less, and still more preferably 20% or less. 2.0 is preferably 5.0% or more to improve the resolution. 2.0 Examples of the range include 5.0% or more and 50% or less, 5.0% or more and 40% or less, 5.0% or more and 30% or less, and 5.0% or more and 20% or less.

[0082] In order to improve the anti-glare properties of the anti-glare film, 0.125 , C 0.5 , C 1.0 and C 2.0 The total is preferably 200% or less, more preferably 150% or less, more preferably 100% or less, and still more preferably 80% or less. The total is preferably 10.0% or more to improve the resolution. The range of the total may be 10.0% or more and 200% or less, 10.0% or more and 150% or less, 10.0% or more and 100% or less, or 10.0% or more and 80% or less.

[0083] <Other layers> The antiglare film may have layers other than the antiglare layer and the transparent substrate described above. Examples of the other layers include an antireflection layer, an antifouling layer, and an antistatic layer. A preferred embodiment having other layers includes an embodiment having an anti-reflection layer on the uneven surface of the anti-glare layer, and the surface of the anti-reflection layer is the uneven surface of the anti-glare film. It is more preferred that the anti-reflection layer has antifouling properties. That is, it is more preferred that an antifouling anti-reflection layer is on the anti-glare layer, and the surface of the antifouling anti-reflection layer is the uneven surface of the anti-glare film.

[0084] 《Anti-reflection layer》 Examples of the antireflection layer include a single-layer structure of a low refractive index layer, a two-layer structure of a high refractive index layer and a low refractive index layer, and a multi-layer structure of three or more layers. The low refractive index layer and the high refractive index layer can be formed by a general-purpose wet method or dry method. In the case of the wet method, the single-layer structure or two-layer structure is preferable, and in the case of the dry method, the multi-layer structure is preferable.

[0085] --Single-layer or two-layer structure-- The single layer structure or the two layer structure is preferably formed by a wet method. The low refractive index layer is preferably disposed on the outermost surface of the antiglare film. When the antireflection layer is to be provided with antifouling properties, it is preferable that the low refractive index layer contains an antifouling agent such as a silicone-based compound or a fluorine-based compound.

[0086] The lower limit of the refractive index of the low refractive index layer is preferably 1.10 or more, more preferably 1.20 or more, more preferably 1.26 or more, more preferably 1.28 or more, and more preferably 1.30 or more, and the upper limit is preferably 1.48 or less, more preferably 1.45 or less, more preferably 1.40 or less, more preferably 1.38 or less, and more preferably 1.32 or less. Preferred embodiments of the refractive index of the low refractive index layer include 1.10 to 1.48, 1.10 to 1.45, 1.10 to 1.40, 1.10 to 1.38, 1.10 to 1.32, 1.20 to 1.48, 1.20 to 1.45, 1.20 to 1.40, 1.20 to 1.38, 1.20 to 1.32, 1.26 to 1.48, 1.26 to 1.4 5 or less, 1.26 to 1.40, 1.26 to 1.38, 1.26 to 1.32, 1.28 to 1.48, 1.28 to 1.45, 1.28 to 1.40, 1.28 to 1.38, 1.28 to 1.32, 1.30 to 1.48, 1.30 to 1.45, 1.30 to 1.40, 1.30 to 1.38, and 1.30 to 1.32.

[0087] The lower limit of the thickness of the low refractive index layer is preferably 80 nm or more, more preferably 85 nm or more, and more preferably 90 nm or more, and the upper limit is preferably 150 nm or less, more preferably 110 nm or less, and more preferably 105 nm or less. Preferred embodiments of the thickness range of the low refractive index layer include 80 nm or more and 150 nm or less, 80 nm or more and 110 nm or less, 80 nm or more and 105 nm or less, 85 nm or more and 150 nm or less, 85 nm or more and 110 nm or less, 85 nm or more and 105 nm or less, 90 nm or more and 150 nm or less, 90 nm or more and 110 nm or less, and 90 nm or more and 105 nm or less.

[0088] The high refractive index layer is preferably disposed closer to the antiglare layer than the low refractive index layer. The lower limit of the refractive index of the high refractive index layer is preferably 1.53 or more, more preferably 1.54 or more, more preferably 1.55 or more, and more preferably 1.56 or more, and the upper limit is preferably 1.85 or less, more preferably 1.80 or less, more preferably 1.75 or less, and more preferably 1.70 or less. Preferred embodiments of the refractive index of the high refractive index layer include 1.53 or more and 1.85 or less, 1.53 or more and 1.80 or less, 1.53 or more and 1.75 or less, 1.53 or more and 1.70 or less, 1.54 or more and 1.85 or less, 1.54 or more and 1.80 or less, 1.54 or more and 1.75 or less, 1.54 or more and 1.70 or less, 1.55 or more and 1.85 or less, 1.55 or more and 1.80 or less, 1.55 or more and 1.75 or less, 1.55 or more and 1.70 or less, 1.56 or more and 1.85 or less, 1.56 or more and 1.80 or less, 1.56 or more and 1.75 or less, and 1.56 or more and 1.70 or less.

[0089] The upper limit of the thickness of the high refractive index layer is preferably 200 nm or less, more preferably 180 nm or less, and even more preferably 150 nm or less, and the lower limit is preferably 50 nm or more, and more preferably 70 nm or more. Preferred embodiments of the thickness range of the high refractive index layer include 50 nm or more and 200 nm or less, 50 nm or more and 180 nm or less, 50 nm or more and 150 nm or less, 70 nm or more and 200 nm or less, 70 nm or more and 180 nm or less, and 70 nm or more and 150 nm or less.

[0090] --In the case of a multi-layer structure of three or more layers-- The multilayer structure preferably formed by the dry method has a structure in which a total of three or more high refractive index layers and low refractive index layers are alternately laminated. Even in the multilayer structure, the low refractive index layer is preferably disposed on the outermost surface of the antiglare film.

[0091] The high refractive index layer preferably has a thickness of 10 nm to 200 nm, a refractive index of 2.10 to 2.40, and more preferably a thickness of 20 nm to 70 nm. The low refractive index layer preferably has a thickness of 5 nm to 200 nm, a refractive index of 1.33 to 1.53, and more preferably a thickness of 20 nm to 120 nm.

[0092] <Size, shape, etc.> The antiglare film may be in the form of a sheet cut to a predetermined size, or in the form of a roll obtained by winding a long sheet into a roll. The size of the sheet is not particularly limited, but the maximum diameter is about 2 inches to 500 inches. The "maximum diameter" refers to the maximum length when any two points on the antiglare film are connected. For example, when the antiglare film is rectangular, the diagonal line of the rectangle is the maximum diameter. When the antiglare film is circular, the diameter of the circle is the maximum diameter. The width and length of the roll are not particularly limited, but generally, the width is about 500 mm to 3000 mm, and the length is about 500 m to 5000 m. The antiglare film in the form of a roll can be cut into sheets according to the size of an image display device or the like. When cutting, it is preferable to exclude the ends of the roll, which have unstable physical properties. The shape of the sheet is not particularly limited, and examples thereof include polygons such as triangles, rectangles, and pentagons, circles, and random, indefinite shapes. More specifically, when the antiglare film is rectangular, the aspect ratio is not particularly limited as long as it does not cause any problems as a display screen. Examples include width:height = 1:1, 4:3, 16:10, 16:9, and 2:1. In vehicle-mounted applications and digital signage, which are rich in design, there is often no limitation to such aspect ratios.

[0093] The surface shape of the antiglare film opposite to the uneven surface is not particularly limited, but is preferably approximately smooth. Approximately smooth means that the arithmetic mean roughness Ra according to JIS B0601:2001 is less than 0.03 μm, and preferably 0.02 μm or less.

[0094] [Polarizing plate] A polarizing plate according to the present disclosure is a polarizing plate having a polarizer, a first transparent protective plate arranged on one side of the polarizer, and a second transparent protective plate arranged on the other side of the polarizer, At least one of the first transparent protective plate and the second transparent protective plate is the antiglare film of the present disclosure described above, and the polarizer is arranged opposite the surface of the antiglare film opposite the uneven surface.

[0095] <Polarizer> Examples of polarizers include sheet-type polarizers such as polyvinyl alcohol films, polyvinyl formal films, polyvinyl acetal films, and saponified ethylene-vinyl acetate copolymer films dyed with iodine or the like and stretched, wire grid-type polarizers made of a large number of metal wires arranged in parallel, coating-type polarizers coated with lyotropic liquid crystal or a dichroic guest-host material, and multilayer thin film-type polarizers. These polarizers may be reflective polarizers that have the function of reflecting polarized components that are not transmitted.

[0096] <Transparent protection plate> A first transparent protective plate is disposed on one side of the polarizer, and a second transparent protective plate is disposed on the other side of the polarizer. At least one of the first transparent protective plate and the second transparent protective plate is the antiglare film of the present disclosure described above. In the polarizing plate of the present disclosure, one of the first transparent protective plate and the second transparent protective plate may be the antiglare film of the present disclosure described above, or both of the first transparent protective plate and the second transparent protective plate may be the antiglare film of the present disclosure described above.

[0097] Of the first and second transparent protective plates, the transparent protective plate that is not the antiglare film of the present disclosure can be a general-purpose plastic film, glass, or the like.

[0098] The polarizer and the transparent protective plate are preferably attached to each other via an adhesive. A general-purpose adhesive can be used as the adhesive, and a PVA-based adhesive is preferable.

[0099] [Face plate for image display device] The face plate for an image display device of the present disclosure is a face plate for an image display device having a protective film laminated onto a resin plate or a glass plate, the protective film being the anti-glare film of the present disclosure described above, and the face of the anti-glare film opposite the uneven surface is arranged opposite the resin plate or the glass plate.

[0100] As the resin plate or glass plate, a resin plate or glass plate that is generally used as a front plate of an image display device can be used.

[0101] The thickness of the resin plate or glass plate is preferably 10 μm or more in order to improve the strength. The upper limit of the thickness of the resin plate or glass plate is usually 5000 μm or less. In order to reduce the thickness, the upper limit of the thickness of the resin plate or glass plate is preferably 1000 μm or less, more preferably 500 μm or less, and even more preferably 100 μm or less. Examples of the range of the thickness of the resin plate or glass plate include 10 μm or more and 5000 μm or less, 10 μm or more and 1000 μm or less, 10 μm or more and 500 μm or less, and 10 μm or more and 100 μm or less.

[0102] [Image display panel] The image display panel of the present disclosure is an image display panel having a display element and an optical film arranged on the light emission surface side of the display element, the optical film including the antiglare film of the present disclosure described above, and arranged so that the surface of the antiglare film on the uneven surface side faces away from the display element (see Figure 4).

[0103] In an image display panel, the antiglare film of the present disclosure is preferably disposed on the outermost surface on the light exit surface side of a display element.

[0104] Examples of the display element include a liquid crystal display element, an EL display element (an organic EL display element, an inorganic EL display element), a plasma display element, and further, an LED display element such as a micro LED display element. These display elements may have a touch panel function inside the display element. Examples of the liquid crystal display mode of the liquid crystal display element include the IPS mode, VA mode, multi-domain mode, OCB mode, STN mode, and TSTN mode.

[0105] The image display panel of the present disclosure may be an image display panel with a touch panel having a touch panel between a display element and an antiglare film.

[0106] The size of the image display panel is not particularly limited, but the maximum diameter is about 2 inches to 500 inches. The maximum diameter means the maximum length when connecting any two points on the surface of the image display panel.

[0107] [Image display device] The image display device of the present disclosure includes the image display panel of the present disclosure.

[0108] The image display device of the present disclosure is not particularly limited as long as it includes the image display panel of the present disclosure. The image display device of the present disclosure preferably includes the image display panel of the present disclosure, a drive control unit electrically connected to the image display panel, and a housing that houses them. When the display element is a liquid crystal display element, the image display device of the present disclosure requires a backlight, which is disposed on the side opposite to the light exit surface of the liquid crystal display element.

[0109] The size of the image display device is not particularly limited, but the maximum diameter of the effective display area is about 2 inches to 500 inches. The effective display area of ​​an image display device is an area in which an image can be displayed. For example, when the image display device has a housing that surrounds a display element, the area inside the housing is the effective image area. The maximum diameter of the effective image area is the maximum length between any two points within the effective image area. For example, if the effective image area is rectangular, the maximum diameter is the diagonal of the rectangle. If the effective image area is circular, the maximum diameter is the diameter of the circle.

[0110] This disclosure includes the following [1]-

[18] . [1] An antiglare film having an antiglare layer, the antiglare film having an uneven surface, a 60 degree specular gloss measured from the uneven surface side of 30.0 or less, and a luminance variation coefficient of 0.0400 or less. (Measurement of the coefficient of variation of brightness) The surface of the anti-glare film opposite to the uneven surface is laminated on an image display device having a display element with a pixel density of 424 ppi. In a darkroom, the image of the image display device is displayed in green, and is photographed from the anti-glare film side with a CCD camera to obtain image data. The CCD camera has a pixel pitch of 5.5 μm×5.5 μm and a pixel count of 16 million pixels. The distance from the surface of the display element to the entrance pupil of the camera lens of the CCD camera is 500 mm. From the obtained image data, a region α of 128×128 pixels is extracted. The region α is subdivided into regions of 8×8 pixels each to obtain 256 small regions. In each small region, the luminance of each pixel of each small region is divided by the average luminance of all pixels of each small region to obtain a corrected luminance. The standard deviation of the corrected luminance of the 256 small regions is divided by the average value of the corrected luminance of the 256 small regions to calculate the luminance variation coefficient. [2] The antiglare film according to [1], having a 20 degree specular gloss measured from the uneven surface side of 6.0 or less. [3] The antiglare film according to [1] or [2], wherein, when the root mean square slope of the uneven surface is defined as Δq and the root mean square wavelength of the uneven surface is defined as λq, Δq is 0.250 μm / μm or more and λq is 17,000 μm or less. [4] The antiglare film according to any one of [1] to [3], wherein the root mean square roughness of the uneven surface is defined as Rq, and Rq is 0.300 μm or more. [5] The antiglare film according to any one of [1] to [4], having a haze according to JIS K7136:2000 of 40% or more and 98% or less. [6] The antiglare film according to any one of [1] to [5], wherein the antiglare layer contains a binder resin and particles having an average particle diameter of 1.0 μm or more and 10.0 μm or less. [7] The antiglare film according to [6], wherein, when the thickness of the antiglare layer is defined as T and the average particle diameter of the particles is defined as D, D / T is 0.20 or more and 0.96 or less. [8] The antiglare film according to [6] or [7], comprising 10 parts by mass or more and 200 parts by mass or less of the particles per 100 parts by mass of the binder resin. [9] The antiglare film according to any one of [6] to [8], wherein the particles include inorganic particles.

[10] The antiglare film according to [9], further comprising organic particles as the particles.

[11] The antiglare film according to

[10] , wherein the inorganic particles are irregular inorganic particles, and the mass ratio of the irregular inorganic particles to the organic particles is 5:1-1:1.

[12] The antiglare film according to any one of [6] to

[10] , wherein the antiglare layer further contains inorganic fine particles having an average particle diameter of 1 nm or more and 200 nm or less.

[13] The antiglare film according to any one of [6] to

[12] , wherein the binder resin comprises a cured product of an ionizing radiation curable resin composition and a thermoplastic resin.

[14] The antiglare film according to any one of [1] to

[13] , further comprising an antireflection layer on the antiglare layer, the surface of the antireflection layer being the uneven surface of the antiglare film.

[15] A polarizing plate having a polarizer, a first transparent protective plate arranged on one side of the polarizer, and a second transparent protective plate arranged on the other side of the polarizer, A polarizing plate, wherein at least one of the first transparent protective plate and the second transparent protective plate is an antiglare film described in any one of [1] to

[14] , and the polarizer is disposed opposite the surface of the antiglare film opposite the uneven surface.

[16] A face panel for an image display device, comprising a protective film laminated onto a resin plate or a glass plate, the protective film being an antiglare film as described in any one of [1] to

[14] , and the face of the antiglare film opposite the uneven surface being arranged to face the resin plate or the glass plate.

[17] An image display panel having a display element and an optical film arranged on the light output side of the display element, the optical film including an antiglare film according to any one of [1] to

[14] , and arranged so that the surface of the antiglare film having the uneven surface faces away from the display element.

[18] An image display device comprising the image display panel according to

[17] , and having the antiglare film disposed on the outermost surface. EXAMPLES

[0111] Next, the present disclosure will be described in more detail with reference to examples, but the present disclosure is not limited to these examples. In addition, "parts" and "%" are based on mass unless otherwise specified.

[0112] 1. Measurement and Evaluation The antiglare films of the examples and comparative examples were measured and evaluated as follows. The atmosphere during each measurement and evaluation was set to a temperature of 23±5°C and a relative humidity of 40% to 65%. Before each measurement and evaluation, the target sample was exposed to the above atmosphere for 30 minutes to 60 minutes before the measurement and evaluation. The results are shown in Table 1 or 2.

[0113] 1-1.Specular gloss measurement A sample was prepared by bonding a black plate (Kuraray Co., Ltd., product name "COMOGLAS DFA2CG 502K (black) series", total light transmittance 0%, thickness 2 mm, refractive index 1.49) to the transparent substrate side of the antiglare film of each of the examples and comparative examples via a 25 μm thick transparent adhesive layer (Panac Corporation, product name "Panaclean PD-S1", refractive index 1.49) (sample size: length 10 cm × width 10 cm). The 60-degree specular gloss and 20-degree specular gloss of the uneven surface side of the sample were measured using a gloss meter (Murakami Color Research Institute, product name "GM-26PRO"). Note that the power switch of the device was turned on in advance, and the device was turned on for 15 minutes or more to allow the light source to stabilize, and the sample was measured after standardization using the standard plate attached to the device. Standardization was performed by setting the black glass surface of the standard plate on the sample stage so that it was the measurement surface, and adjusting the span adjustment knob to the value specified by the standard plate. In addition, based on the description in the specification, measurements were performed at 16 points for each sample, and the average values ​​of the 16 points were taken as the 60-degree specular gloss and 20-degree specular gloss of each Example and Comparative Example.

[0114] 1-2. Measurement of the coefficient of variation of brightness Sony Corporation's product name "Xperia (registered trademark) Z5 E6653" was prepared as an image display device having a display element with a pixel density of 424 ppi. The surface opposite to the uneven surface of the antiglare film of the examples and comparative examples was laminated onto the image display device via a transparent adhesive medium (Fujicopian Co., Ltd., product name "FIXFILM HGA2"). The transparent adhesive medium has a transparent adsorption layer, a transparent substrate with a thickness of 50 μm, and a transparent adhesive layer in this order. At this time, the adhesive layer side of the transparent adhesive medium was laminated to the image display device side, and the adhesive layer side of the transparent adhesive medium was laminated to the opposite side to the uneven surface of the antiglare film. The CCD camera used was a camera body (a cooled CCD camera [Bittran Corporation, product name "BU-63M", pixel pitch: 5.5 μm × 5.5 μm, number of pixels: 16 megapixels, number of pixels: 4896 × 3264]) equipped with a camera lens (Nikon Corporation, product name "AI AF Micro-Nikkor 60 mm f / 2.8D"). Next, the image display device with the anti-glare film attached and the CCD camera were arranged so that the distance from the surface of the display element to the entrance pupil of the camera lens of the CCD camera was 500 mm. The effective F-number of the camera lens was set to 36.4. The focus of the CCD camera was adjusted to match the surface of the display element, and the image was taken in a darkroom environment with the image display device displaying green, where green is the single maximum gradation ((R,G,B)=(0,255,0)) of the display's constituent primary colors. When photographing, the exposure time was adjusted so that the gradation of the acquired data did not exceed the upper and lower limits of the gradation range, and the data was acquired. From the image data thus obtained, a region α of 128×128 pixels of the image sensor required for calculating the luminance variation coefficient was extracted. The region α was divided into regions of 8×8 pixels each to obtain 256 small regions. In each small region, the luminance of each pixel in the small region was divided by the average luminance of all pixels in the small region to obtain a corrected luminance. The standard deviation of the corrected luminance of the 256 small regions was divided by the average luminance of the corrected luminance of the 256 small regions to calculate the luminance variation coefficient. As described in the specification, in the method for measuring the luminance variation coefficient of the present disclosure, the luminance of each pixel in each small region is divided by the average luminance of all pixels in each small region, so that the luminance unevenness specific to the display element can be corrected. Furthermore, in the method for measuring the luminance variation coefficient of the present disclosure, the standard deviation of the corrected luminance is divided by the average value of the corrected luminance, so that the absolute value of the luminance specific to the display element is not affected. Based on the description in the specification, measurements were made at 16 points for each sample, and the average value of the 16 points was taken as the coefficient of variation of luminance for each of the examples and comparative examples.

[0115] 1-3. Surface shape measurement Using a white light interference microscope (Zygo, product name "New View7300"), the sample prepared in 1-1 was set on the measurement stage so that it was fixed and in close contact, and then the surface shape of the anti-glare film was measured and analyzed under the following conditions. As the measurement software, Zygo's product name "Microscope Stitching Application of MetroPro ver9.0.10 (64-bit)" was used to automatically stitch together multiple images for measurement. For analysis, Microscope Application of MetroPro ver9.0.10 (64-bit) was used.

[0116] (Measurement conditions) Objective lens: 50x ImageZoom: 1x Stitch Controls Type: Column & Row N Cols:3 N Rows:3 Overlap(%):10 Measurement area: 611μm x 611μm Camera Resolution: 0.44μm ·Instrument:NewView7000 Id 0 SN 073395 Acquisition Mode: Scan ·Scan Length:10μm bipolar(2sec) Camera Mode: 496x496 70Hz Subtract Sys Err:Off Sys Err File: SysErr.dat AGC:Off Phase Res:High ·Connection Order:Location Discon Action: Filter Min Mod(%):0.01 Min Area Size:7 Remove Fringes:Off Number of Averages: 0 FDA Noise Threshold: 10 ·Scan Length:10um bipolar (3 sec) ·Extended Scan Length: 1000 μm FDA Res:High 2G

[0117] (Analysis conditions) Removed: None Data Fill:On Data Fill Max:10000 Filter:HighPass FilterType:GaussSpline Filter Window Size:3 Filter Trim:Off ·Filter Low wavelength:800μm Min Area Size:0 Remove spikes: On Spike Height(xRMS):2.5

[0118] "Low wavelength" corresponds to the "cutoff value λc" in the roughness parameters.

[0119] "rms" was displayed on the Surface Map screen, and this value was used as the "Rq" of the measurement area. Also, "rms" was displayed on the Slope Mag Map screen, and this value was used as the "Δq" of the measurement area. Furthermore, the values ​​of Rq and Δq were substituted into the above formula (A) to calculate "λq".

[0120] 1-4. Total light transmittance (Tt) and haze (Hz) The antiglare films of the examples and comparative examples were cut into 10 cm squares. The cut locations were randomly selected after visually checking for any abnormalities such as dust or scratches. The total light transmittance of each sample according to JIS K7361-1:1997 and the haze according to JIS K7136:2000 were measured using a haze meter (HM-150, manufactured by Murakami Color Research Laboratory). In order to allow the light source to stabilize, the device was powered on and then left for 15 minutes or more, and calibration was performed without setting anything at the entrance opening (where the measurement sample was placed), after which the measurement sample was placed at the entrance opening and measurements were performed. The light incident surface during measurement was set to the transparent substrate side.

[0121] 1-5. Anti-glare properties 1 (anti-glare properties in the regular reflection direction) The sample prepared in 1-1 was placed on a horizontal table 70 cm high with the uneven surface facing up, and the reflection of the illumination light on the uneven surface was evaluated in a bright room environment from the angle of the regular reflection direction of the illumination light according to the following evaluation criteria. During the evaluation, the position of the sample relative to the illumination was adjusted so that the angle of incidence of the light emitted from the center of the illumination on sample B was 10 degrees. The illumination was an Hf32 type straight tube three-wavelength daylight fluorescent lamp, and the illumination was positioned 2 m above the horizontal table in the vertical direction. The evaluation was performed in the range where the illuminance on the uneven surface of the sample was 500 lux to 1000 lux. The observer's line of sight was about 160 cm from the floor. The observers were 20 healthy people in their 30s with eyesight of 0.7 or higher. <Evaluation criteria> A: More than 16 people answered that they could not distinguish the outline and position of the light at all. A-: 11 to 15 people answered that they could not distinguish the outline and position of the light at all. B: Fewer than 10 people answered that they could not distinguish the outline and position of the light at all. Furthermore, among those who did not answer as above, less than half answered that they could vaguely distinguish the outline and position of the light. C: Fewer than 10 people answered that they could not distinguish the outline and position of the light at all. Furthermore, among those who did not answer as above, more than half answered that they could vaguely distinguish the outline and position of the light.

[0122] 1-6. Anti-glare properties 2 (Anti-glare properties at various angles) The sample prepared in 1-1 was held with both hands, and the height and angle of the sample were changed while evaluating the reflection of the illumination light on the uneven surface in the same manner as in 1-5. The angle was changed so that the incident angle of the light emitted from the center of the illumination to the sample was in the range of 10 degrees to 70 degrees.

[0123] 1-7. Glare Sony Corporation's product name "Xperia (registered trademark) Z5 E6653" was prepared as an image display device having a display element with a pixel density of 424 ppi. The surface opposite to the uneven surface of the antiglare film of the examples and comparative examples was laminated onto the image display device via a transparent adhesive film (Fujicopian Co., Ltd., product name "FIXFILM HGA2"). The transparent adhesive film has an adsorption layer, a substrate with a thickness of 50 μm, and an adhesive layer in this order. At this time, the adhesive layer side of the transparent adhesive film was laminated to the image display device side, and the adhesive layer side of the transparent adhesive film was laminated to the opposite side to the uneven surface of the antiglare film. The image display device with the anti-glare film attached was placed on a horizontal stand, and the image display device was set to display green. The image display device was visually evaluated from all angles 50 cm above the anti-glare film to see whether glare was noticeable at the area where the anti-glare film was attached. The evaluation environment was a bright room environment (illuminance on the anti-glare film was 500-1000 lux. Lighting: Hf32 type straight tube three-wavelength daylight fluorescent lamp. The lighting was positioned 2 m above the horizontal stand in the vertical direction). Twenty subjects rated the lenses, giving 3 points for no glare, 2 points for neutral, and 0 points for strong glare. The average scores of the 20 subjects were calculated and ranked according to the following criteria. The 20 subjects were five people from each age group, from their 20s to their 50s. <Evaluation criteria> A: Average score of 2.5 or higher B: Average score is between 2.0 and 2.5 C: Average score is 1.5 or more but less than 2.0 D: Average score is less than 1.5

[0124] 1-8. Transmitted image clarity The anti-glare films of the examples and comparative examples were cut into 10 cm squares. The cut locations were selected at random after visually checking for any abnormalities such as dust or scratches. The transmitted image clarity of the samples was measured in accordance with JIS K7374:2007 using an image clarity measuring device (product name: ICM-1T) manufactured by Suga Test Instruments Co., Ltd. The optical comb had five widths: 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm, and 2.0 mm. The light incident surface during measurement was the transparent substrate side. C 0.125 , C 0.25 , C 0.5 , C 1.0 and C 2.0 The value of and C 0.125 , C 0.5 , C 1.0 and C 2.0 The total values ​​are shown in Table 2.

[0125] 1-9. Scratch resistance The anti-glare films of the examples and comparative examples were attached to the base of a Gakushin abrasion tester with the uneven surface facing up. Steel wool #0000 (manufactured by Japan Steel Wool Co., Ltd., product name "Bonstar B-204") was set. The steel wool was brought into contact with the uneven surface, and moved back and forth 10 times while applying a load at a moving speed of 100 mm / sec and a moving distance of 200 mm per round trip. The contact area between the steel wool and the sample was set to 2 cm x 2 cm. Thereafter, each sample was visually observed under fluorescent lighting to confirm the number of scratches. At that time, the illuminance on the antiglare film was 800 lux or more and 1200 lux or less, and the observation distance was 30 cm. For each antiglare film, the maximum load (g) per unit area when no scratches were observed after the test was confirmed. For each antiglare film, the test was performed with n=2, the average of the maximum load was calculated, and the evaluation was performed according to the following criteria. For Comparative Examples 1 and 2, which were rated C for antiglare property, and Comparative Example 3, which was rated D for glare, the evaluation of scratch resistance was not performed. <Evaluation criteria> A: Maximum load is 200g or more B: Maximum load is 150g or more and less than 200g C: Maximum load is less than 150g

[0126] 1-10. Jet black The sample prepared in 1-1 was placed on a horizontal table 70 cm high with the uneven surface facing up. The position of the sample relative to the lighting was adjusted so that the light with the strongest angle of emission from the lighting would not just barely enter the sample. Due to the adjustments described above, the position of the sample relative to the observer was placed farther away from the observer than the position of sample 1-5. The samples were placed in the above positions, and the degree of reflected and scattered light was evaluated according to the following evaluation criteria. The observer's line of sight was approximately 160 cm from the floor. The observers were 20 healthy people with eyesight of 0.7 or higher. Five people were selected from each age group, from their 20s to their 50s. For Comparative Examples 1 and 2, which were rated C for anti-glare performance, and Comparative Example 3, which was rated D for glare performance, evaluation of jet blackness was not performed. <Evaluation criteria> A: More than 14 people felt that the jet black was good. B: 7 to 13 people felt that the jet black was good C: 6 or less people felt that the jet black was good

[0127] 2. Preparation of anti-glare film [Example 1] The antiglare layer coating solution 1 having the following formulation was applied onto a transparent substrate (a triacetyl cellulose resin film (TAC) having a thickness of 80 μm, Fujifilm Corporation, TD80UL), and dried at 70°C for 30 seconds at a wind speed of 5 m / s. After that, the coating solution was dried in a nitrogen atmosphere with an oxygen concentration of 200 ppm or less, with an integrated light intensity of 100 mJ / cm. 2 An antiglare layer was formed by irradiating ultraviolet rays so as to obtain an antiglare film of Example 1. The thickness of the antiglare layer was 5.0 μm. The arithmetic mean roughness Ra of the surface opposite to the uneven surface of the antiglare film was 0.012 μm. The antiglare layers of Examples 1-9 and Comparative Examples 1-3 were prepared by the method (d1) in the specification.

[0128] [Example 2] An antiglare film of Example 2 was obtained in the same manner as in Example 1, except that antiglare layer coating solution 1 was changed to the following antiglare layer coating solution 2 and the thickness of the antiglare layer was changed to 6.5 μm.

[0129] [Examples 3, 6, 7, 8], [Comparative Examples 1-3] The antiglare films of Examples 3, 6, 7, and 8 and Comparative Examples 1-3 were obtained in the same manner as in Example 1, except that the antiglare layer coating solution 1 was changed to the following antiglare layer coating solution 3-9.

[0130] [Example 4] An anti-reflection layer was formed by sputtering on the anti-glare layer of the anti-glare film of Example 1 to obtain an anti-glare film of Example 4. The anti-reflection layer had a multi-layer structure in which a low refractive index layer of 10 nm thickness made of SiO2, a high refractive index layer of 25 nm thickness made of Nb2O5, a low refractive index layer of 35 nm thickness made of SiO2, a high refractive index layer of 40 nm thickness made of Nb2O5, and a low refractive index layer of 104 nm thickness made of SiO2 were laminated in this order. The refractive indices of the high refractive index layer and the low refractive index layer were measured by the Becke method, and the refractive index of the high refractive index layer was 2.32, and the refractive index of the low refractive index layer was 1.45.

[0131] [Example 5] On the antiglare layer of the antiglare film of Example 2, low refractive index layer coating solution 1 having the following formulation was applied, and dried at 70° C. and a wind speed of 5 m / s for 30 seconds, and then exposed to ultraviolet light in a nitrogen atmosphere (oxygen concentration of 200 ppm or less) with an integrated light amount of 100 mJ / cm 2 . 2 Thus, a low refractive index layer was formed, and an antiglare film of Example 5 was obtained. The low refractive index layer had a thickness of 0.10 μm and a refractive index of 1.32.

[0132] [Example 9] An antiglare film of Example 9 was obtained in the same manner as in Example 5, except that the antiglare film of Example 8 was used instead of the antiglare film of Example 2.

[0133] [Example 10] The antiglare layer coating solution 11 having the following formulation was applied onto a transparent substrate (a triacetyl cellulose resin film (TAC) having a thickness of 80 μm, Fujifilm Corporation, TD80UL), and dried at 70° C. for 60 seconds at a wind speed of 5 m / s. After that, the integrated light amount was 60 mJ / cm 2 An antiglare layer was formed by irradiating the antiglare layer with a thickness of 8.0 μm. Next, low refractive index layer coating solution 1 was applied onto the antiglare layer, and dried at 70° C. and a wind speed of 2 m / s for 30 seconds. After that, the antiglare layer was irradiated with ultraviolet light in a nitrogen atmosphere (oxygen concentration of 200 ppm or less) with an integrated light amount of 100 mJ / cm 2 2 Thus, a low refractive index layer was formed, and an antiglare film of Example 11 was obtained. The antiglare layers of Example 10 and Comparative Example 4 were prepared by the phase separation method of (d2) in the specification.

[0134] [Comparative Example 4] The antiglare layer coating solution 10 having the following formulation was applied onto a transparent substrate (100 μm thick polyethylene terephthalate resin film (PET), Mitsubishi Chemical Corporation, Diafoil), and dried at 80° C. for 60 seconds at a wind speed of 5 m / s. After that, the integrated light amount was 100 mJ / cm 2 An antiglare layer was formed by irradiating the antiglare film of Comparative Example 4. The thickness of the antiglare layer was 9.0 μm. The arithmetic mean roughness Ra of the surface opposite to the uneven surface of the antiglare film was 0.014 μm.

[0135] [Comparative Example 5] An antiglare film of Comparative Example 5 was obtained in the same manner as in Comparative Example 4, except that the antiglare layer coating solution was changed to Antiglare Layer Coating Solution 12 having the following formulation and the thickness of the antiglare layer was changed to 7.0 μm.

[0136] [Comparative Example 6] An antiglare film of Comparative Example 6 was obtained in the same manner as in Comparative Example 4, except that the antiglare layer coating solution was changed to Antiglare Layer Coating Solution 13 having the following formulation.

[0137] [Comparative Example 7] An antiglare film of Comparative Example 7 was obtained in the same manner as in Comparative Example 4, except that the antiglare layer coating solution was changed to Antiglare Layer Coating Solution 14 having the following formulation and the thickness of the antiglare layer was changed to 6.0 μm.

[0138] <Anti-glare layer coating solution 1> Pentaerythritol triacrylate 80 parts (Nippon Kayaku Co., Ltd., product name: KAYARAD-PET-30) · Urethane acrylate oligomer 20 parts (DIC, product name: V-4000BA) Silica particles 25 parts (Average particle size: 4.1μm) (Fuji Silysia Chemical, gel-process amorphous silica) ·Organic particles 10 parts (Sekisui Plastics, spherical polyacrylic-styrene copolymer) (average particle size 2.0 μm, refractive index 1.515) (The ratio of particles with a diameter of 1.8-2.2 μm is 90% or more) Photoinitiator 3 parts (IGM Resins BV, product name: Omnirad184) Photoinitiator 2 parts (IGM Resins BV, product name: Omnirad907) Silicone leveling agent 0.2 parts (Momentive Performance Materials, product name: TSF4460) Solvent (toluene) 233.0 parts Solvent (cyclohexanone) 27.1 parts

[0139] <Anti-glare layer coating solution 2> A coating solution having the same composition as anti-glare layer coating solution 1, except that the organic particles in anti-glare layer coating solution 1 were changed to organic particles with "average particle size of 3.5 μm and refractive index of 1.515 (Sekisui Chemical Co., Ltd., spherical polyacrylic-styrene copolymer, with 90% or more particles having a particle size of 3.3-3.7 μm)", the silica particles were changed to silica particles with "average particle size of 6.0 μm (Fuji Silysia Chemical Co., Ltd., gel-process amorphous silica)", and the amount of silica particles added was changed from 25 parts to 20 parts.

[0140] <Anti-glare layer coating solution 3> A coating solution having the same composition as antiglare layer coating solution 1, except that the amount of organic particles added was changed from 10 parts to 0 parts, and the amount of silica particles added was changed from 25 parts to 30 parts.

[0141] <Anti-glare layer coating solution 4> Pentaerythritol triacrylate 51.4 parts (Nippon Kayaku Co., Ltd., product name: KAYARAD-PET-30) Urethane acrylate oligomer 23.7 parts (DIC, product name: V-4000BA) ·Thermoplastic resin 24.9 parts (Acrylic polymer, Mitsubishi Rayon, molecular weight 75,000) ·Organic particles 59.3 parts (Sekisui Plastics, spherical polyacrylic-styrene copolymer) (average particle size 2.5 μm, refractive index 1.515) (The ratio of particles with a diameter of 2.3-2.7 μm is 90% or more) ·215 parts of inorganic fine particle dispersion (Nissan Chemical, silica with reactive functional groups on the surface, solvent: MIBK, solid content: 35.5%) (Average particle size 12nm) (Active ingredient of inorganic fine particles: 76.3 parts) Photopolymerization initiator 1.5 parts (IGM Resins BV, product name: Omnirad184) Photopolymerization initiator 4.8 parts (IGM Resins BV, product name: Omnirad907) Silicone leveling agent 0.2 parts (Momentive Performance Materials, product name: TSF4460) Solvent (toluene) 317.6 parts Solvent (cyclohexanone) 15.0 parts Solvent (methyl isobutyl ketone) 121.1 parts

[0142] <Anti-glare layer coating solution 5> A coating solution having the same composition as antiglare layer coating solution 4, except that the amount of organic particles added was changed from 59.3 parts to 43.3 parts, and the amount of inorganic fine particle dispersion silica particles added was changed from 215 parts to 182 parts.

[0143] <Anti-glare layer coating solution 6> A coating solution having the same composition as Antiglare Layer Coating Solution 1, except that the amount of silica particles added in Antiglare Layer Coating Solution 1 was changed from 25 parts to 20 parts.

[0144] <Anti-glare layer coating solution 7> Pentaerythritol triacrylate 65 parts (Nippon Kayaku Co., Ltd., product name: KAYARAD-PET-30) · Urethane acrylate oligomer 35 parts (DIC, product name: V-4000BA) ·Organic particles 14 parts (Sekisui Plastics, spherical polyacrylic-styrene copolymer) (average particle size 3.5 μm, refractive index 1.550) Silica particles 6 parts (Average particle size: 12nm) (Fumed silica, manufactured by Nippon Aerosil Co., Ltd.) Photopolymerization initiator 5 parts (IGM Resins BV, product name: Omnirad184) Silicone leveling agent 0.025 parts (Momentive Performance Materials, product name: TSF4460) Solvent (toluene) 100 parts Solvent (cyclohexanone) 20 parts Solvent (isopropyl alcohol) 55 parts

[0145] <Anti-glare layer coating solution 8> Pentaerythritol triacrylate 100 parts (Nippon Kayaku Co., Ltd., product name: KAYARAD-PET-30) Silica particles 7 parts (Average particle size: 4.1μm) (Fuji Silysia Chemical, gel-process amorphous silica) Photopolymerization initiator 5 parts (IGM Resins BV, product name: Omnirad184) Silicone leveling agent 0.2 parts (Momentive Performance Materials, product name: TSF4460) Solvent (toluene) 150 parts Solvent (MIBK) 35 parts Solvent (ethyl acetate) 5.2 parts

[0146] <Anti-glare layer coating solution 9> A coating solution having the same composition as Antiglare Layer Coating Solution 8, except that the amount of silica particles added was changed from 7 parts to 14 parts.

[0147] <Antiglare layer coating solution 10> Acrylic polymer 15.0 parts (Daicel Allnex, product name: Cyclomer P) Cellulose acetate propionate 3 parts (Eastman Company, Product name: CAP-482-20) 150 parts of nano-silica-containing acrylic UV-curable compound (Momentive Performance Materials, product name: UVHC7800G) Silicone acrylate 1 part (Daicel Allnex, product name: EB1360) Photopolymerization initiator 1 part (IGM Resins BV, product name: Omnirad184) Photopolymerization initiator 1 part (IGM Resins BV, product name: Omnirad907) Solvent (methyl ethyl ketone) 101 parts Solvent (1-butanol) 24 parts

[0148] <Anti-glare layer coating solution 11> Isobornyl methacrylate-containing oligomer 5.0 parts Pentaerythritol triacrylate 30 parts Nanosilica-containing acrylic UV-curable compound 120 parts (Momentive Performance Materials, product name: UVHC7800G) Photopolymerization initiator 1 part (IGM Resins BV, product name: Omnirad184) Photopolymerization initiator 1 part (IGM Resins BV, product name: Omnirad907) Solvent (isopropanol) 115 parts Solvent (MIBK) 40 parts

[0149] <Anti-glare layer coating solution 12> Acrylic polymer 12.5 parts (Daicel Allnex, product name: Cyclomer P) Cellulose acetate propionate 5.5 parts (Eastman Company, Product name: CAP-482-20) Nanosilica-containing acrylic UV-curable compound 149 parts (Momentive Performance Materials, product name: UVHC7800G) Fluorine-based compounds 0.1 parts (NEOS, product name: Futergent 602A) Photopolymerization initiator 1 part (IGM Resins BV, product name: Omnirad184) Photopolymerization initiator 1 part (IGM Resins BV, product name: Omnirad907) Solvent (methyl ethyl ketone) 129 parts Solvent (1-butanol) 24 parts Solvent (1-methoxy-2-propanol) 13 parts

[0150] <Anti-glare layer coating solution 13> Acrylic polymer 12.5 parts (Daicel Allnex, product name: Cyclomer P) Cellulose acetate propionate 4 parts (Eastman Company, Product name: CAP-482-20) Nanosilica-containing acrylic UV-curable compound 210 parts (JGC Catalysts and Chemicals, HP-1004) Silicone acrylate 1 part (Daicel Allnex, product name: EB1360) Photopolymerization initiator 1 part (IGM Resins BV, product name: Omnirad184) Photopolymerization initiator 1 part (IGM Resins BV, product name: Omnirad907) Solvent (methyl ethyl ketone) 31 parts Solvent (1-butanol) 24 parts Solvent (1-methoxy-2-propanol) 12 parts

[0151] <Anti-glare layer coating solution 14> Acrylic polymer 47.5 parts (Daicel Allnex, product name: Cyclomer P) Cellulose acetate propionate 1.5 parts (Eastman Company, Product name: CAP-482-20) Urethane acrylate 79.5 parts (Shin Nakamura Chemical Co., Ltd., product name: U-15HA) Photopolymerization initiator 1 part (IGM Resins BV, product name: Omnirad184) Photopolymerization initiator 1 part (IGM Resins BV, product name: Omnirad907) Solvent (methyl ethyl ketone) 175 parts Solvent (1-butanol) 28 parts Solvent (1-methoxy-2-propanol) 2 parts

[0152] <Low refractive index layer coating solution 1> Polyfunctional acrylic ester composition 100 parts by weight (Manufactured by Daiichi Kogyo Seiyaku Co., Ltd., product name "New Frontier MF-001") Hollow silica particles 200 parts by weight (Average primary particle diameter: 75 nm, particles surface-treated with a silane coupling agent having a methacryloyl group) Solid silica particles 110 parts by weight (Average primary particle diameter 12.5 nm, particles surface-treated with a silane coupling agent having a methacryloyl group) Silicone leveling agent 13 parts by weight (Shin-Etsu Chemical Co., Ltd., product name "X-22-164E") Photopolymerization initiator 4.3 parts by weight (IGM Resins, product name "Omnirad127") Solvent 14,867 parts by weight (Mixed solvent of methyl isobutyl ketone and 1-methoxy-2-propyl acetate. Mass ratio = 68 / 32)

[0153] [Table 1] [Table 2]

[0154] From the results in Table 1, it can be confirmed that the antiglare films of the examples have excellent antiglare properties and can suppress glare. [Explanation of symbols]

[0155] 10: Transparent base material 20: Anti-glare layer 21: Binder resin 22: Particles 100:Anti-glare film 110: Display element 120: Image display panel 200: Transparent adhesive medium 31: Camera body 32: Lens 300:CCD camera 500: Fixtures 600: Horizontal stand 700: Observer< / rq>

Claims

1. An anti-glare film having an anti-glare layer, wherein the anti-glare film has an uneven surface, the 60-degree specular gloss measured from the uneven surface side is 30.0 or less, the coefficient of variation of luminance is 0.0400 or less, and the transmitted image clarity measured in accordance with JIS K7374:2007 is defined as C 0.125 for an optical comb width of 0.125 mm, C 0.5 for an optical comb width of 0.5 mm, C 1.0 for an optical comb width of 1.0 mm, and C 2.0 for an optical comb width of 2.0 mm, and the sum of C 0.125, C 0.5, C 1.0 and C 2.0 is 150% or less. (Measurement of the coefficient of variation of luminance) The side of the anti-glare film opposite to the uneven surface is bonded to an image display device having a display element with a pixel density of 424 ppi. In a darkroom, the image on the image display device is displayed in green, and the image is captured from the anti-glare film side with a CCD camera to obtain image data. The CCD camera used has a pixel pitch of 5.5 μm × 5.5 μm and 16 million pixels. The distance from the surface of the display element to the entrance pupil of the camera lens of the CCD camera is set to 500 mm. A region α of 128 × 128 pixels is extracted from the obtained image data. Region α is subdivided into 8 × 8 pixel regions to obtain 256 sub-regions. In each sub-region, the brightness of each pixel in the sub-region is divided by the average brightness of all pixels in the sub-region to obtain the corrected brightness. The standard deviation of the corrected brightness of the 256 sub-regions is divided by the average value of the corrected brightness of the 256 sub-regions to calculate the coefficient of variation of brightness.

2. The anti-glare film according to claim 1, wherein the 20-degree specular gloss measured from the uneven surface side is 6.0 or less.

3. The anti-glare film according to Claim 1, wherein when the root mean square slope of the uneven surface is defined as Δq and the root mean square wavelength of the uneven surface is defined as λq, Δq is 0.250 μm / μm or more and λq is 17.000 μm or less.

4. The anti-glare film according to claim 1 or 3, wherein when the mean square roughness of the uneven surface is defined as Rq, Rq is 0.300 μm or more.

5. The anti-glare film according to claim 1 or 2, wherein the haze according to JIS K7136:2000 is 40% or more and 98% or less.

6. The anti-glare film according to claim 1 or 2, wherein the anti-glare layer comprises a binder resin and particles with an average particle diameter of 1.0 μm or more and 10.0 μm or less.

7. The anti-glare film according to claim 6, wherein when the thickness of the anti-glare layer is defined as T and the average particle diameter of the particles is defined as D, D / T is 0.20 or more and 0.96 or less.

8. The anti-glare film according to claim 6, comprising 10 to 200 parts by mass of the particles with respect to 100 parts by mass of the binder resin.

9. The anti-glare film according to claim 6, wherein the particles include inorganic particles.

10. The anti-glare film according to claim 9, further comprising organic particles as the particles.

11. The anti-glare film according to claim 10, wherein the inorganic particles are amorphous inorganic particles, and the mass ratio of the amorphous inorganic particles to the organic particles is 5:1 to 1:

1.

12. The anti-glare film according to claim 6, wherein the anti-glare layer further comprises inorganic fine particles with an average particle diameter of 1 nm or more and 200 nm or less.

13. The anti-glare film according to claim 6, wherein the binder resin comprises a cured product of an ionizing radiation-curable resin composition and a thermoplastic resin.

14. The anti-glare film according to claim 1 or 2, further comprising an anti-reflective layer on the anti-glare layer, wherein the surface of the anti-reflective layer is the uneven surface of the anti-glare film.

15. A polarizing plate having a polarizer, a first transparent protective plate disposed on one side of the polarizer, and a second transparent protective plate disposed on the other side of the polarizer, A polarizing plate wherein at least one of the first transparent protective plate and the second transparent protective plate is the anti-glare film described in claim 1, and the polarizer is positioned opposite to the surface of the anti-glare film that is opposite to the uneven surface.

16. A surface plate for an image display device, wherein a protective film is bonded to a resin plate or a glass plate, the protective film being the anti-glare film described in Claim 1, and the surface of the anti-glare film opposite to the uneven surface is positioned opposite the resin plate or the glass plate.

17. An image display panel having a display element and an optical film disposed on the light-emitting surface side of the display element, wherein the optical film includes the anti-glare film described in Claim 1, and the surface of the anti-glare film with the uneven surface side faces away from the display element.

18. An image display device comprising the image display panel described in Claim 17, wherein the anti-glare film is placed on the outermost surface.

Images