JP2009157047A - Surface member and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface member which can prevent glare and image blurring even when being disposed at a long distance from a display part of a display device and can prevent reflection even in a dark environment, and to provide a display device. <P>SOLUTION: The surface member has an antiglare layer containing a binder resin and two kinds of pigments, wherein the two kinds of pigments are an inorganic pigment and resin beads; a thickness of the antiglare layer is 30 to 95% of an average particle size of the resin beads; an average particle size of the inorganic pigment is greater than the thickness of the antiglare layer and is <120% of the average particle size of the resin beads; and the surface member has a haze value of 5.0 to 15.0% in JIS:K7136:2000. Furthermore, in the antiglare layer, 1 to 10 pts.wt. of two kinds of pigments are added per 100 pts.wt. of the binder resin and a weight ratio of the inorganic pigment to the resin beads is 1:1 to 3:1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a surface member and a display device arranged on the surface of a display unit such as a liquid crystal display device, and in particular, a surface that prevents glare of a display image while preventing reflection even when attached to a transparent plate. The present invention relates to a member and a display device.

  Conventionally, on the display screen of a liquid crystal display device, a plasma display device, an electroluminescence display device, etc., in addition to protecting the surface, in order to prevent difficulty in seeing due to reflection or reflection of external light on the display screen, A reflection-preventing film obtained by subjecting the transparent polymer film to surface unevenness is disposed on the outermost surface of the display device.

  And as a method of giving a surface unevenness | corrugation process to a film, performing a blast process to the transparent polymer film surface, or providing an uneven | corrugated resin layer in a transparent polymer film is performed. Further, such an uneven resin layer often contains a resin that becomes a matting agent for forming unevenness.

  However, with the high definition of each display device, the matting agent of the concavo-convex resin layer becomes a lens, causing glare of the image and image blurring, resulting in reduced visibility.

  Therefore, a reflection preventing film having both functions of preventing reflection and preventing glare has been proposed (Patent Document 1).

JP 2003-248101 A (background art, claims)

  However, when the anti-reflection film as described above is attached at a distance away from the display unit surface of the display device, for example, a glass or the like is placed on the display device surface and the anti-reflection film is attached to the glass surface. In such a case, there was a problem that glare and image blur could not be prevented. In particular, it was found that the thicker the glass, the more difficult it is to prevent glare and image blur.

  In addition, the reflection of external light can be prevented in a bright environment, but when a room light or the like is lit in a dark room, the reflection becomes intense and further reflection prevention performance is required.

  Accordingly, an object of the present invention is to provide a surface member and a display device that can prevent glare and image blur even when attached at a distance away from the display device, and can prevent reflection even in a dark environment. To do.

  The surface member of the present invention that solves the above problems is a surface member having an antiglare layer containing a binder resin and two kinds of pigments, wherein the two kinds of pigments are inorganic pigments and resin beads. The thickness of the layer is 30 to 95% of the average particle diameter of the resin beads, and the average particle diameter of the inorganic pigment is larger than the thickness of the antiglare layer and smaller than 120% of the average particle diameter of the resin beads. In addition, the haze value of the surface member in JIS K7136: 2000 is 5.0 to 15.0%.

  Further, in the surface member of the present invention, the addition amount of the two types of pigments is 1 to 10 parts by weight with respect to 100 parts by weight of the binder resin, and the weight ratio of the inorganic pigment to the resin beads is 1: 1 to 1 part. It is characterized by being 3: 1.

  And the display apparatus of this invention is provided in the display part surface of the display apparatus so that the glare-proof layer of the surface member of Claim 1 or 2 may become the outermost surface.

  The display device of the present invention is characterized by having a transparent plate between the surface member and the display portion surface. Furthermore, the transparent plate is a glass plate.

  The average particle size and the variation coefficient of the particle size distribution referred to in the present invention are calculated from values measured by a Coulter counter method.

  According to the surface member of the present invention, glare and image blur can be prevented even when the surface member is arranged at a distance away from the display unit surface of the display device, and reflection can be prevented even in a dark environment. A surface member and a display device that can be obtained can be obtained.

  The surface member of the present invention will be described. The surface member of the present invention is a surface member having an antiglare layer containing a binder resin and two types of pigments, wherein the two types of pigments are inorganic pigments and resin beads, and the thickness of the antiglare layer is 30-95% of the average particle diameter of the resin beads, the average particle diameter of the inorganic pigment is larger than the thickness of the antiglare layer, and smaller than 120% of the average particle diameter of the resin beads, The haze value of the surface member in JIS K7136: 2000 is 5.0 to 15.0%. Hereinafter, embodiments of the surface member of the present invention will be described.

  The antiglare layer contains a binder resin and two types of pigments. As the binder resin, a resin excellent in optical transparency can be used. For example, polyester resin, acrylic resin, acrylic urethane resin, polyester acrylate resin, polyurethane acrylate resin, epoxy acrylate resin, urethane Thermoplastics such as epoxy resins, epoxy resins, polycarbonate resins, cellulose resins, acetal resins, polyethylene resins, polystyrene resins, polyamide resins, polyimide resins, melamine resins, phenol resins, silicone resins Resins, thermosetting resins, ionizing radiation curable resins and the like can be used, and curable resins having excellent surface hardness are particularly preferable. Of these, acrylic resins having excellent optical properties are preferably used.

  The total weight ratio of the binder resin and the two types of pigments is preferably 1 part by weight or more and 10 parts by weight or less as the upper limit, and more preferably 5 parts by weight or less, relative to 100 parts by weight of the binder resin. The amount of 1 part by weight or more is to form an uneven shape for preventing reflection in the antiglare layer, and the amount of 10 parts by weight or less prevents reflection even if more pigment is contained. This is because it does not contribute to the improvement of the image quality, the transparency is lowered and the image blur occurs, and the image recognition property is lowered.

  The two types of pigments are inorganic pigments and resin beads. As inorganic pigments, inorganic fine particles such as silica, clay, talc, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, titanium oxide, synthetic zeolite, alumina, smectite can be used, and as resin beads, styrene resin, Organic fine particles made of urethane resin, benzoguanamine resin, silicone resin, acrylic resin, or the like can be used.

  The weight ratio of the inorganic pigment to the resin beads is preferably 1: 1 to 3: 1. When the inorganic pigment and the resin beads have a weight ratio of more than 3: 1, the transparency is lowered and the image recognizability is lowered. On the other hand, when the weight ratio of the inorganic pigment to the resin beads is more than 1: 1, the image blur occurs and the image recognition performance is deteriorated. Also, on the premise of maintaining the transparency necessary to ensure sufficient image recognition, reflection is not sufficiently prevented when only inorganic pigments are used, and glare only with resin beads. Generation cannot be suppressed.

  In order to obtain image recognizability while maintaining transparency, the haze value in JIS K7136: 2000 is 5.0 to 15.0%, preferably 5.0 to 10%. The haze can be adjusted by adjusting the amount of the two types of pigments added, or by adjusting the relationship between the average particle diameter of each of the two types of pigments and the film thickness of the antiglare layer.

  The resin beads cannot be generally specified depending on the thickness of the antiglare layer, but the average particle diameter is preferably 3.0 to 8.0 μm. The reason why the average particle size is 3.0 μm or more is to form an uneven shape without being buried in the antiglare layer and to prevent reflection, and that the particle size is 8.0 μm or less increases the resin beads. Therefore, the resin beads become convex lenses to increase the ratio of enlargement of the display element, thereby preventing glare and image blurring from becoming prominent. In addition, if tempered glass or the like is installed to protect the surface of the display unit of the display device, the distance between the display unit and the antiglare layer is increased, so that glare and image blur are emphasized. If the diameter is within this range, it is possible to prevent the image recognizability from being lowered even if the distance is long.

  Further, the coefficient of variation of the particle size distribution of the resin beads is preferably 8 to 25%. Even if the average particle diameter is the same, if the coefficient of variation is large, a portion that is buried in the antiglare layer or a portion that protrudes greatly from the antiglare layer is formed. Gloss occurs due to occurrence of a part buried in the anti-glare layer, makes it difficult to prevent reflection, and a part that protrudes greatly from the anti-glare layer tends to cause glare. End up.

  In addition, the average particle diameter of the inorganic pigment is larger than the thickness of the antiglare layer and smaller than 120% of the average particle diameter of the resin beads. By making it larger than the thickness of the antiglare layer, the inorganic pigment buried in the antiglare layer can be reduced, and glare can be efficiently prevented while preventing reflection. Also, the reason why the average particle size of the resin beads is smaller than 120% is that when the average particle size of the inorganic pigment is increased, the portion protruding from the antiglare layer is increased, haze is high, and the image recognizability is deteriorated. Because. In the present application, the average particle diameter of the inorganic pigment smaller than 120% of the average particle diameter of the resin beads includes 120% and 120% or less.

  The thickness of the antiglare layer is preferably 30 to 95%, more preferably 50 to 85% of the average particle diameter of the resin beads contained. By setting the thickness of the antiglare layer to 30% or more of the average particle diameter of the resin beads, it is possible to prevent the image recognizability from being lowered due to a decrease in transparency due to an increase in the number of portions protruding from the antiglare layer of the resin beads. By setting the ratio to 95% or less, reflection can be prevented by unevenness caused by a portion protruding from the antiglare layer of the resin beads. In addition, the thickness of the anti-glare layer as used in this application is a film thickness of only the binder resin which comprises an anti-glare layer.

  Further, the thickness of the antiglare layer depends on the size of the resin beads to be contained, but cannot be generally stated. However, if the average particle size of the resin beads is 3.0 to 8.0 μm, the thickness is 0.9 to 7. 6 μm is preferred. By setting the thickness of the antiglare layer to 0.9 μm or more, the coating strength of the antiglare layer can be sufficiently maintained. And by setting it as 7.6 micrometers or less, an uneven | corrugated shape can be formed, without using a pigment with a big average particle diameter, and the fall of the image recognition property by generation | occurrence | production of glare and image blur can be suppressed. .

  Such an antiglare layer is disposed on the outermost surface of the surface member of the present invention, and is provided on the surface of the display unit of the display device. An anti-glare layer can be directly provided on a conventionally known surface member constituting the display device by coating or the like, or can be attached to the display unit surface of the display device via an adhesive layer. Furthermore, the display of the display device of the present invention is obtained by providing a surface member by providing an antiglare layer directly on a film, sheet, plate or the like for protecting the display device, or by sticking it through an adhesive layer. You may install in the part surface.

  Such an antiglare layer may be a single layer, but may be provided on a substrate in order to facilitate processing and handling.

  As the base material, any material having a high transmittance may be used. For example, polyester resin, acrylic resin, acrylic urethane resin, polyester acrylate resin, polyurethane acrylate resin, epoxy acrylate resin, urethane resin, epoxy Resin, polycarbonate resin, cellulose resin, acetal resin, vinyl resin, polyethylene resin, polystyrene resin, polypropylene resin, polyamide resin, polyimide resin, melamine resin, phenol resin, silicone resin , Fluoropolymers, cyclic olefins and the like, or a polymer film or glass plate excellent in transparency in which two or more kinds are mixed can be used. Moreover, what provided the easily bonding layer etc. suitably in these polymer films is also used suitably.

  The thickness of the substrate is not particularly limited as long as it is a thickness that does not hinder handling, but the surface member constituting the display device or a transparent plate for protecting the display device via an adhesive layer When sticking, about 10-250 micrometers and 12-125 micrometers are preferable. On the other hand, when the base material also serves as a transparent plate for protecting the display device, 1 to 20 mm is preferable. The thickness is set to 20 mm or less as the thickness increases, the antiglare layer becomes farther from the surface of the display unit of the display device, and the ratio of the resin beads becoming a convex lens to enlarge the display element increases, causing glare and image blurring. This is because is emphasized.

  The transparent plate is a film, sheet, or plate for protecting the display device, and the same material as the substrate can be used. As thickness, 1-20 mm is preferable. The reason why the thickness of the transparent plate is 1 mm or more is to obtain strength for protecting the surface of the display unit with the transparent plate, and that the thickness is 20 mm or less when the thickness of the transparent plate is increased. This is because the antiglare layer becomes far from the surface, the ratio of the resin beads becoming a convex lens and the enlargement of the display element increases, and glare and image blur are emphasized.

  In particular, when a glass plate is used as a transparent plate in order to give a reflection prevention function to the glass plate, it is easier and cheaper to prevent reflection than a conventional method of adding a reflection prevention function to the glass plate. Functions can be added. Furthermore, impact resistance is also improved by sticking a surface member having an adhesive layer on the surface opposite to the antiglare layer provided on the polymer film to the glass plate via the adhesive layer.

  Adhesives used in the adhesive layer include pressure sensitive adhesives made of natural rubber, recycled rubber, chloroprene rubber, nitrile rubber, styrene / butadiene, epoxy, urethane, acrylic, acrylate compounds, etc. Hot melt adhesives, ionizing radiation curable adhesives, and the like can be used.

  As a method for forming the antiglare layer and the adhesive layer, a coating solution is prepared by dissolving or dispersing the constituent components of each layer in an appropriate solvent, and the coating solution is roll coating, bar coating, spray coating, air knife. The method of apply | coating and drying by well-known methods, such as a coating method, is mention | raise | lifted.

  Next, the display device of the present invention will be described.

  The display device of the present invention is characterized in that the above-described surface member of the present invention is provided on the display unit surface of the display device so that the antiglare layer is the outermost surface. As the display device, a liquid crystal display device, a plasma display device, an EL display device, or the like can be used. Hereinafter, the case where it applies to a liquid crystal display device is demonstrated.

  The liquid crystal display device includes at least a liquid crystal cell and a polarizing plate installed on both surfaces of the liquid crystal cell. The surface member is installed on the surface of the display unit of the liquid crystal display device so that the antiglare layer is the outermost surface.

  FIG. 1 is a cross-sectional view showing an embodiment of a liquid crystal display device 7. The liquid crystal display device 7 includes a liquid crystal cell 1 composed of a glass substrate 11 and a liquid crystal 12, a polarizing plate 2, a backlight 3, and a housing 4, and the surface member 6 of the present invention is installed on the display unit surface. Consists of.

  As the members other than the surface member 6 constituting the liquid crystal display device, conventionally known members can be used.

  The display device 7 of the present invention is characterized in that the transparent plate 5 is provided between the surface member 6 and the surface of the display unit, and the transparent plate is a glass plate. Is.

  The transparent plate is a film, a sheet, or a plate-like material for protecting the display device, and the same substrate as the display member can be used. As thickness, 1-20 mm is preferable. The reason why the thickness of the transparent plate is 1 mm or more is to obtain strength for protecting the surface of the display unit with the transparent plate, and that the thickness is 20 mm or less when the thickness of the transparent plate is increased. This is because the antiglare layer becomes far from the surface, the ratio of the resin beads becoming a convex lens and the enlargement of the display element increases, and glare and image blur are emphasized.

  For example, when a surface member attached to a transparent plate through an adhesive layer is used, the distance from the antiglare layer to the display unit surface is increased by attaching the surface member to the transparent plate. In general, as the distance from the display unit surface to the antiglare layer increases, the antiglare layer becomes farther from the display unit surface of the display device, and the rate at which the resin beads become convex lenses and the display element is enlarged increases. The blur and image blur are emphasized, and it is difficult to achieve both the reflection prevention function, the glare prevention function, and the image blur prevention function. However, in the display device of the present invention, the antiglare layer of the surface member is made specific, so that the balance between the anti-reflection function, the anti-glare function, and the anti-blurring function can be improved.

  In addition, when a glass plate is used as the transparent plate, it is possible to manufacture a display device easily and inexpensively than a display device using a surface member provided with a reflection preventing function on a conventional glass plate, By attaching a surface member having an adhesive layer on the opposite side of the antiglare layer provided on the polymer film to the glass plate through the adhesive layer, a display device with improved impact resistance can be obtained. it can.

  According to the display device of the present invention as described above, even when the distance from the display unit surface of the display device to the antiglare layer is large, reflection, glare and image blur can be prevented in a well-balanced manner. Reflection of images can be prevented in a bright environment. Furthermore, when the room light or the like is lit in a dark room, the reflection becomes intense and further reflection prevention performance is required, but the reflection can be prevented even in a dark environment.

  The following examples further illustrate the present invention. “Parts” and “%” are based on weight unless otherwise specified.

[Example 1]
On a 125 μm thick transparent polyester film (Lumirror U34: Toray Industries, Inc.), an antiglare layer coating solution having the following composition is applied by a bar coating method so that the thickness after drying is 3.5 μm, dried and irradiated with ultraviolet rays Thus, an antiglare layer was formed. Next, on the surface of the transparent polyester film where the antiglare layer is not formed, an adhesive layer coating solution having the following composition is applied by a bar coating method so that the thickness after drying is 20 μm, and after drying, the thickness is The surface member of Example 1 was produced by bonding with 15 mm of tempered glass and an adhesive layer.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.24 parts (Silicia 440: Fuji Silysia Chemical Co., Ltd. <average particle size: 3.5 μm>)
・ Resin beads 0.12 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 2]
A surface member of Example 2 was produced in the same manner as in Example 1 except that the thickness of the antiglare layer of Example 1 was 1.5 μm.

[Example 3]
The surface member of Example 3 was prepared in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition, and the thickness of the antiglare layer was 4.5 μm. Produced.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.24 parts (Silicia 446: Fuji Silysia Chemical Co., Ltd. <average particle size: 4.5 μm>)
・ Resin beads 0.12 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 4]
A surface member of Example 4 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
Inorganic pigment 0.08 part (Silycia 440: Fuji Silysia Chemical Co., Ltd. <average particle size: 3.5 μm>)
・ Resin beads 0.04 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 5]
A surface member of Example 5 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
Inorganic pigment 0.44 parts (Silysia 440: Fuji Silysia Chemical Co. <average particle size: 3.5 μm>)
・ 0.22 parts of resin beads (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 6]
A surface member of Example 6 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
Inorganic pigment 0.80 parts (Silycia 440: Fuji Silysia Chemical Co. <average particle size: 3.5 μm>)
Resin beads 0.40 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 7]
A surface member of Example 7 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.18 parts (Silycia 440: Fuji Silysia Chemical Co., Ltd. <average particle size: 3.5 μm>)
・ Resin beads 0.18 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 8]
A surface member of Example 8 was prepared in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.27 parts (Silicia 440: Fuji Silysia Chemical Co., Ltd. <average particle size: 3.5 μm>)
・ Resin beads 0.09 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 9]
A surface member of Example 9 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.12 parts (Silycia 440: Fuji Silysia Chemical Co., Ltd. <average particle size: 3.5 μm>)
・ 0.24 parts of resin beads (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 10]
A surface member of Example 10 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
Inorganic pigment 0.09 part (Silycia 440: Fuji Silysia Chemical Co., Ltd. <average particle size: 3.5 μm>)
Resin beads 0.27 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 11]
The surface member of Example 11 was prepared in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition, and the thickness of the antiglare layer was 1.5 μm. Produced.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.24 parts (Silysia 320: Fuji Silysia Chemical Co., Ltd. <average particle size: 1.6 μm>)
・ Resin beads 0.12 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 12]
A surface member of Example 12 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.24 parts (Silicia 446: Fuji Silysia Chemical Co., Ltd. <average particle size: 4.5 μm>)
・ Resin beads 0.12 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Example 13]
A surface member of Example 13 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.24 parts (Silicia 770: Fuji Silysia Chemical Co., Ltd. <average particle size: 6.0 μm>)
・ Resin beads 0.12 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Comparative Example 1]
A surface member of Comparative Example 1 was produced in the same manner as in Example 1 except that the thickness of the antiglare layer in Example 1 was 1.2 μm.

[Comparative Example 2]
A surface member of Comparative Example 2 was produced in the same manner as Example 1 except that the thickness of the antiglare layer of Example 1 was 4.9 μm.

[Comparative Example 3]
A surface member of Comparative Example 3 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
Inorganic pigment 1.30 parts (Silycia 440: Fuji Silysia Chemical Co., Ltd. <average particle size: 3.5 μm>)
・ 0.65 parts of resin beads (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Comparative Example 4]
A surface member of Comparative Example 4 was prepared in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
Inorganic pigment 0.36 parts (Silysia 440: Fuji Silysia Chemical Co. <average particle size: 3.5 μm>)
・ Propylene glycol monomethyl ether 40 parts

[Comparative Example 5]
A surface member of Comparative Example 5 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
Resin beads 0.36 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Comparative Example 6]
A surface member of Comparative Example 6 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.24 parts (Silysia 320: Fuji Silysia Chemical Co., Ltd. <average particle size: 1.6 μm>)
・ Resin beads 0.12 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Comparative Example 7]
A surface member of Comparative Example 7 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
・ Ionizing radiation curable resin 20.00 parts (Unidic 17-813: Dainippon Ink and Chemicals <solid content: 80%>)
・ 0.40 parts of photopolymerization initiator (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.24 parts (Silysia 370: Fuji Silysia Chemical Co., Ltd. <average particle size: 3.0 μm>)
・ Resin beads 0.12 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 22 parts

[Comparative Example 8]
A surface member of Comparative Example 8 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
・ Inorganic pigment 0.24 parts (SS # 30: Nitto Flour Chemical Co., Ltd. <average particle size: 7.4 μm>)
・ Resin beads 0.12 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

[Comparative Example 9]
A surface member of Comparative Example 9 was produced in the same manner as in Example 1 except that the antiglare layer coating solution of Example 1 was replaced with an antiglare layer coating solution having the following composition.

<Anti-glare layer coating solution>
-Ionizing radiation curable resin 16.25 parts (Unidic 17-813: Dainippon Ink & Chemicals, Inc. <solid content: 80%>)
-Photopolymerization initiator 0.33 parts (Irgacure 651: Ciba Japan)
Inorganic pigment 0.24 parts (Silysia 470: Fuji Silysia Chemical Co., Ltd. <average particle size: 12.0 μm>)
・ Resin beads 0.12 parts (MX500: Soken Chemical Industry Co., Ltd. <average particle size: 5 μm / variation coefficient: 10%>)
・ Propylene glycol monomethyl ether 40 parts

  The surface members of Examples 1 to 13 and Comparative Examples 1 to 9 are arranged so that the antiglare layer is the outermost surface on the display unit surface of the liquid crystal display device, and the liquid crystals of Examples 1 to 13 and Comparative Examples 1 to 9 are used. A display device was produced.

  The following items were evaluated for the surface members and liquid crystal display devices of Examples 1 to 13 and Comparative Examples 1 to 9. The results are shown in Table 1.

(1) Transparency About the surface members of Examples 1 to 13 and Comparative Examples 1 to 9, using a haze meter (NDH2000: Nippon Denshoku Industries Co., Ltd.), the total light transmittance in JIS K7361-1: 1997 and JIS K7136. : The haze value at 2000 was measured.

(2) Reflection prevention property As shown in FIG. 2, the distance A from the fluorescent lamp 8 to the floor is 2 m, the distance B from the display device 7 to the floor is 1 m, and the distance C from the display device 7 to the observer is 1 m. The condition of the fluorescent light reflected on the surface of the display device was evaluated in both the bright room and the dark room. “◎” indicates that the shape of the reflected fluorescent light cannot be confirmed at all, “○” indicates that the shape of the reflected fluorescent light is hardly confirmed, and “△” indicates that the shape of the reflected fluorescent light can be confirmed in a dull manner. “×” indicates that the reflected fluorescent lamp is intense and the shape of the reflected fluorescent lamp can be clearly confirmed.

(3) Anti-glare effect “◎” indicates that there is no glare when the entire screen is displayed in white, and red or green dots are emphasized when the entire screen is displayed in white. Of the display device and the observer when the distance between the viewer and the observer is 30 cm. The case where there was a feeling of glare due to scattering was designated as “x”.

(4) Image blur prevention When a small black character is displayed on a white background, the outline of the character does not appear blurred or red blurring does not appear, “◎”, and the distance between the display device and the observer is 30 cm. Occasionally, red blurring is not visible, but “○” indicates that the outline of the text is blurred, and red blurring is not visible when the distance between the display device and the observer is 1 m, but the outline of the text is blurred “△” and those with red blurring were assigned “X”.

  As is clear from the above results, in the surface member of Example 1, the thickness of the antiglare layer is 70% of the average particle diameter of the resin beads, and the average particle diameter of the inorganic pigment is 70 of the average particle diameter of the resin beads. %. The ratio of the two types of pigment to 100 parts by weight of the binder resin is in the range of 1 to 5 parts, and the ratio of the inorganic pigment to the resin beads is 2: 1. Therefore, transparency, antireflection, and glare prevention are prevented. And anti-blurring property were very excellent.

  The surface member of Example 2 was very excellent in reflection prevention and glare prevention, and was excellent in transparency and image blur prevention. In addition, since the thickness of the antiglare layer is 30% of the average particle diameter of the resin beads, there are many portions protruding from the antiglare layer of the resin beads, and compared with the surface member of Example 1, transparency and prevention of image blurring are increased. Sex was not obtained.

  The surface member of Example 3 was very excellent in transparency and image blur prevention properties, and was excellent in reflection prevention properties and glare prevention properties. In addition, since the thickness of the antiglare layer is 90% of the average particle diameter of the resin beads, there are few portions protruding from the antiglare layer of the resin beads, and the antireflection effect is obtained as compared with the surface member of Example 1. It was not.

  The surface member of Example 4 was very excellent in transparency and image blur prevention properties, excellent in reflection prevention properties, and good in glare prevention properties. In addition, since the ratio of the two types of pigment to 100 parts by weight of the binder resin is less than 1 part by weight, the reflection preventing property and the glare prevention property cannot be obtained as compared with the surface member of Example 1.

  The surface member of Example 5 was very excellent in reflection prevention and glare prevention, and was excellent in transparency and image blur prevention. In addition, since the ratio of the two types of pigments to 100 parts by weight of the binder resin is larger than that of the surface member of Example 1, the transparency is lower than that of the display device of Example 1, and image blur prevention property cannot be obtained. Met.

  The surface member of Example 6 was very excellent in anti-reflection and anti-glare properties, and had good transparency and anti-blurring properties. In addition, since the ratio of the two kinds of pigments relative to 100 parts by weight of the binder resin is higher than that of the surface member of Example 5, the transparency is low and the image blurring prevention property is lower than that of the surface member of Example 5. Could not be obtained.

  The surface member of Example 7 was very excellent in transparency, anti-reflection, and anti-blurring properties, and had excellent anti-glare properties. Since the ratio of the inorganic pigment to the resin beads is 1: 1, the amount of the relative inorganic pigment is small, and the glare prevention property cannot be obtained as compared with the surface member of Example 1. It was.

  The surface member of Example 8 was very excellent in the anti-reflection effect in the bright room and the anti-glare property, and had excellent transparency, anti-reflection effect in the dark room, and anti-blurring property. In addition, since the ratio of the inorganic pigment and the resin beads is 3: 1, the inorganic pigment is relatively more in comparison with the surface member of Example 1, and compared with the surface member of Example 1, transparency, dark room In this case, the anti-reflection and image blur prevention properties cannot be obtained.

  The surface member of Example 9 was very excellent in transparency and anti-reflection, excellent in anti-glare property, and excellent in anti-blurring property. Since the ratio between the inorganic pigment and the resin beads is 1: 2, the amount of inorganic pigment is less than that of the surface member of Example 1, and the amount of resin beads is higher. Could not be obtained.

  The surface member of Example 10 was very excellent in transparency and reflection prevention, and had good glare prevention and image blur prevention properties. Since the ratio between the inorganic pigment and the resin beads is 1: 3, the amount of inorganic pigment is smaller and the number of resin beads is larger than that of the surface member of Example 9, and glare is prevented compared to the display device of Example 9. And image blur prevention properties were not obtained.

  The surface member of Example 11 was very excellent in reflection preventing properties, and was excellent in transparency, glare prevention properties, and image blur prevention properties. In addition, since the thickness of the antiglare layer is 30% of the average particle diameter of the resin beads, there are many portions protruding from the antiglare layer of the resin beads, and compared with the surface member of Example 1, transparency and prevention of image blurring are increased. Sex was not obtained. Furthermore, since the average particle diameter of the inorganic pigment was smaller than that of the surface member of Example 2, the glare-preventing property was not obtained as compared with the surface member of Example 2.

  The surface member of Example 12 had excellent anti-reflection and anti-glare properties, and excellent transparency and anti-blurring properties. In addition, since the average particle diameter of the inorganic pigment was larger than that of the surface member of Example 1, transparency and image blur prevention were not obtained as compared with the surface member of Example 1.

  The surface member of Example 13 was very excellent in the anti-reflection effect, excellent in the anti-glare property, and excellent in transparency and anti-blurring property. In addition, since the average particle diameter of the inorganic pigment is larger than that of the surface member of Example 12, transparency, anti-glare property, and anti-blurring property cannot be obtained as compared with the surface member of Example 12. It was a thing.

  In the surface member of Comparative Example 1, the thickness of the antiglare layer is less than 30% of the average particle diameter of the resin beads. Since there are many portions protruding from the antiglare layer of the resin beads, the transparency is low, the image recognizability is poor, and the image blur prevention property is also poor.

  In the surface member of Comparative Example 2, the thickness of the antiglare layer is larger than 95% of the average particle diameter of the resin beads, and since there are few protrusions from the antiglare layer of the resin beads, the antireflection effect in the dark room is prevented. Could not be obtained.

  The surface member of Comparative Example 3 was very excellent in anti-reflection and anti-glare properties. In addition, since the ratio of the two types of pigments relative to 100 parts by weight of the binder resin is higher than that of the surface member of Example 6, the transparency was poor and the image blur prevention property was poor.

  The surface member of Comparative Example 4 uses only an inorganic pigment for the antiglare layer. Although it is very excellent in anti-reflection, it was inferior in transparency, anti-glare and anti-blurring.

  The surface member of Comparative Example 5 uses only resin beads for the antiglare layer. Although the anti-reflection property is very excellent, the anti-blurring property is inferior due to the increased lens effect.

  In the surface member of Comparative Example 6, the average particle diameter of the inorganic pigment is smaller than the thickness of the antiglare layer. Since the inorganic pigment was buried in the antiglare layer, it was inferior in reflection prevention and glare prevention.

  In the surface member of Comparative Example 7, the average particle diameter of the inorganic pigment is smaller than the thickness of the antiglare layer. Since an inorganic pigment having an average particle size larger than that of the inorganic pigment used in Comparative Example 6 was used, the image blur prevention property was better than that of the surface member of Comparative Example 6. However, since many inorganic pigments were buried in the antiglare layer, the antiglare and antiglare properties were poor.

  In the surface member of Comparative Example 8, the average particle diameter of the inorganic pigment is as large as 148% of the average particle diameter of the resin beads. Therefore, there are many portions protruding from the antiglare layer, the transparency is inferior, and image blurring is prevented. It was inferior in nature.

  In the surface member of Comparative Example 9, the average particle diameter of the inorganic pigment is as large as 240% of the average particle diameter of the resin beads. Therefore, there are many portions protruding from the antiglare layer, the transparency is inferior, and image blurring is prevented. It was inferior in nature.

  In addition, even if it is a surface member of Comparative Examples 1-9, when it arrange | positions on the display part surface of a liquid crystal display device, without bonding to tempered glass of thickness 15mm, glare prevention property and image blur prevention property are There was no problem.

Sectional drawing which shows one Example of the display apparatus of this invention Explanatory drawing of evaluation of reflection prevention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal cell 2 ... Polarizing plate 3 ... Backlight 4 ... Case 5 ... Transparent plate 6 ... Surface member 7 ... Liquid crystal display device

Claims (5)

  A surface member having an antiglare layer containing a binder resin and two kinds of pigments, wherein the two kinds of pigments are inorganic pigments and resin beads, and the thickness of the antiglare layer is an average particle diameter of the resin beads. The average particle diameter of the inorganic pigment is larger than the thickness of the antiglare layer and smaller than 120% of the average particle diameter of the resin beads, and JIS K7136: 2000 of the surface member is used. A surface member having a haze value of 5.0 to 15.0%.   In the antiglare layer, the addition amount of the two kinds of pigments is 1 to 10 parts by weight with respect to 100 parts by weight of the binder resin, and the weight ratio of the inorganic pigment and the resin beads is 1: 1 to 3: 1. The surface member according to claim 1, wherein:   A display device comprising the surface member according to claim 1 or 2 on the surface of a display unit of the display device so that the antiglare layer is an outermost surface.   The display device according to claim 3, wherein the display device includes a transparent plate between the surface member and the display portion surface.   The display device according to claim 4, wherein the transparent plate is a glass plate.

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