TWI571651B - Anti - glare film and display device - Google Patents

Description

Anti-glare film and display device

The present invention relates to an anti-glare film suitable for use in a surface substrate disposed on a screen of various display devices, and a display device in which the film is disposed on a screen. The present invention relates to a plasma torch insert wafer and a plasma torch using the same.

In the screens of various display devices (liquid crystal display devices, plasma display devices, etc.), it is difficult to identify glare by protecting the surface and preventing external light from being reflected on the screen. Therefore, an anti-glare film is disposed. By applying a surface unevenness treatment to the anti-glare film, a hard coating layer containing particles as a matting agent can be provided as an anti-glare layer on the substrate, and the above-mentioned unevenness can be applied to the surface of the anti-glare film. deal with.

In recent years, the highly refined evolution of various display devices. As a result, a conventional anti-glare film comprising an anti-glare layer containing a hard coat layer of a particle matting agent is formed on the screen of a display device, and is formed mainly by particles in the hard coat layer. The shape of the lens is caused by a phenomenon called a spark on the surface of the hard coat layer. Therefore, there is a problem that a highly refined color picture is flickering.

Therefore, the particles in the anti-glare layer are required to exhibit anti-glare properties, but relatively, the lens is formed as a center by the particles, and a spark is generated on the surface of the anti-glare layer so that it cannot be prevented from being caused by the spark. Produces a flickering of the surface.

As a technique for preventing the surface flickering phenomenon of the anti-glare layer, it is proposed to use two types of particles having different average particle diameters as the particles contained in the anti-glare layer (Patent Document 1).

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-71424

[Summary of the Invention] [The subject to be solved by the invention]

According to the technique of Patent Document 1, it is found that the RGB light-emitting point is enlarged by the regular and smooth lenticular surface irregularities formed by a single particle, which is a cause of spark, and then becomes the average particle diameter of the matting agent. In addition to the large particles, fine particles having a small average particle size are also used. Thereby, the surface of the lens formed by coarsening the large particles is coarsened by small particles, and as a result, an attempt is made to suppress the flicker of the surface of the anti-glare layer.

However, in recent years, for a highly refined color display device, further improvement in flicker suppression is desired.

In another aspect of the invention, an anti-glare film is provided which improves the performance by preventing the occurrence of spark flicker. In another aspect of the present invention, a display device including a screen having anti-glare property and good flicker prevention property is provided.

[Means to solve the problem]

As described above, the particles in the anti-glare layer are formed on the surface of the anti-glare layer by the lenticular irregularities having the particles as the center, which is a cause of sparks. Therefore, in order to prevent the occurrence of sparks, it is necessary to reduce the amount of particles in the anti-glare layer, and this idea is the technical common knowledge up to now. However, if the antiglare layer is formed by containing particles, the lenticular irregularities are formed on the surface of the antiglare layer, so that the occurrence of sparks cannot be avoided. Therefore, the inventors of the present invention thought that it is impossible to prevent the occurrence of sparks in the antiglare layer containing particles, and if it is difficult to be externally recognized even if a spark occurs (that is, it is difficult to impart spark identification), it is impossible to obtain good flicker prevention performance. The experiment was repeated.

Specifically, an attempt is made to increase the amount of particles in the antiglare layer, thereby enhancing the surface of the roughened antiglare film or increasing the haze of the antiglare film. As a result, it is unexpectedly known that the surface roughness (arithmetic mean roughness: Ra) or the turbidity of the anti-glare film is In the occurrence of spark identification difficulties, a certain degree of correlation can be seen. However, an anti-glare film in which Ra or turbidity becomes high does not necessarily sufficiently recognize the spark that occurs.

Under such opinions, experiments and reviews were repeated, and it was found that by controlling the surface characteristics of the antiglare layer or the optical properties of the entire film, the difficulty in identifying sparks was improved, and as a result, good scintillation prevention performance was obtained. The anti-glare film is such that the present invention has been completed.

The anti-glare film of the present invention has surface irregularities, and is characterized in that the conditions relating to the surface unevenness are defined as A1 to A4, and when the condition of the entire film is B, the composition satisfies (1) and (2). Any of them.

A display device of the present invention is characterized in that the anti-glare film of the present invention is placed on a screen.

(1) Conditions A1, A2 and A3. (2) Conditions A1, A4 and B.

Condition A1: Rzjis (ten-point average roughness) is 3.4 μm or less; Condition A2: RΔq (quadratic mean square root inclination) is 4° or more; Condition A3: Ra (arithmetic mean roughness) is 0.3 μm or more Condition A4: Rsm (average pitch) is 0.05 mm or more and 0.10 mm or less; Condition B: haze value is 20% or more and 50% or less.

The present invention encompasses the following aspects.

The anti-glare film of the present invention can satisfy the above (1) while adding the following A5 and A6 as conditions for the surface unevenness, and also satisfies (3).

(3) One or more selected from the conditions A4, A5, A6, and B.

Condition A5: Rz (maximum height) is 4.5 μm or less; Condition A6: Rp (maximum peak) is 1.5 μm or more and 2.3 μm or less.

The anti-glare film of the present invention can also satisfy the above (2) by satisfying the above-mentioned (2) while adding the following A5 and A6 as conditions for the surface unevenness.

(4) One or more selected from the conditions A2, A3, A5, and A6.

Condition A5: Rz (maximum height) is 4.5 μm or less; Condition A6: Rp (maximum peak) is 1.5 μm or more and 2.3 μm or less.

Further, the above numerical values other than the condition B are all measured according to JIS B0601; 2001. The above values in Condition B are values measured in accordance with JIS K7136:2000.

The anti-glare film of the present invention may comprise an anti-glare layer having the above-mentioned specific surface unevenness. In this state, the specific antiglare layer can be obtained by molding by a mold or by coating with a particle coating or the like.

The anti-glare film of the present invention may be configured to have an anti-glare layer which is formed by coating a dry coating on a transparent substrate with a particle-containing coating material, and the surface unevenness is formed in the anti-glare layer.

In this state, particles containing a particle coating are used as resin particles that can be used. Further, it is preferable that the configuration satisfies one or more of the conditions C1 to C4.

The condition C1; the average particle diameter (D) of the particles is 4.0 μm or more and 6.0 μm or less; the condition C2: the coefficient of variation (CV value) of the particles is 20% or less; Condition C3: the particle content in the antiglare layer is relative to the adhesion 100 parts by weight of the resin is at least 4 parts by weight or more and 8 parts by weight or less; Condition C4: The thickness of the antiglare layer is 40% or more and 90% or less of the average particle diameter (D) of the particles.

According to the present invention, it is possible to provide an anti-glare film which improves the scintillation performance against spark generation. Further, it is possible to provide a display device that prevents a screen having anti-glare property and good flicker performance.

First, an example of the anti-glare film of the present invention will be described. As shown in Figure 1. As shown in the figure, the anti-glare film 1 of the present example is an example in which a laminated structure of the anti-glare layer 12 is laminated on the transparent substrate 11.

As a series of transparent substrates 11 , for example, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyethylene, polypropylene, polystyrene A transparent film formed of a material such as triethylenesulfonyl cellulose or propylene. Even among these, due to good mechanical strength or dimensional stability, it is preferable to extend the processing, particularly the polyethylene terephthalate film which is subjected to biaxial stretching processing. Further, it is suitable to use a corona discharge treatment on the surface of the transparent substrate 11 or to improve the adhesion to the antiglare layer 12 by providing an easy-bonding layer. The thickness of the transparent substrate 11 is generally 25 to 500 μm, preferably 50 to 200 μm.

Further, the anti-glare film of the present invention is not limited to the laminated structure of Fig. 1. For example, as shown in Fig. 2, the anti-glare film 1a may be formed in the single-layer antiglare layer 12 in a single treatment state.

The anti-glare film 1, 1a is an anti-glare layer 12 having surface irregularities. In the present example, the conditions of the surface unevenness of the relevant anti-glare layer 12 are referred to as A1 to A4, and when the conditions of the entire film 1 and 1a are taken as B, the configuration satisfies any of (1) and (2). Hereinafter, it describes in detail.

The antiglare film 1 and 1a of the first aspect are configured to satisfy (1).

(1) Conditions A1, A2 and A3

The condition A1 is that the Rzjis (ten-point average roughness) of the surface of the anti-glare layer 12 is not more than a predetermined value, specifically, a condition of 3.4 μm or less. The best is 3.2 μm or less, and the better is 2.0 μm or more.

The condition A2 is that R?q (the square mean square root inclination) of the surface of the antiglare layer 12 is a predetermined value or more, specifically, a condition of 4 or more. Preferably, it is 4.5 or more, preferably 5 or more, and preferably 10 or less, preferably 6 or less.

The condition A3 is that the Ra (arithmetic mean roughness) of the surface of the antiglare layer 12 is a predetermined value or more, specifically, a condition of 0.3 μm or more. The amount is preferably 0.4 μm or more, preferably 0.5 μm or more, more preferably 1.0 μm or less, and more preferably 0.8 μm or less.

The so-called Rzjis (ten-point average thickness) is the average of the peak heights from the highest peak to the fifth peak in the order of the highest peak, and the darkest order from the deepest bottom to the fifth. The sum of the average of the depths of the valley bottom. Therefore, the more the value of Rzjis is higher than the height of the lens of the rough curve, the smaller the value of Rzjis and the lower the height of the lens than the thick curve.

The so-called R Δq (quadratic mean square root inclination) is a parameter showing the degree of inclination of the thick curve. Specifically, the larger the value of RΔq is, the sharper the slope of the thick curve is, and the smaller the value of RΔq is, the smoother the slope of the thick curve is. In other words, it is considered that the larger the value of RΔq is, the more the inclination of each of the concave and convex lines (each lens) of the rough curve is sharpened, and the smaller the value of RΔq is, the smaller the unevenness of each curve is formed (each lens) The tilting system is smoother.

Ra (arithmetic mean roughness) is a parameter showing the average of the thickness of the coarse curve.

In the first aspect, the selection of Ra, RΔq, and Rzjis as control parameters was found by experiments to improve the anti-glare property and prevent the occurrence of spark flicking by controlling these parameters.

Specifically, it is possible to find the anti-glare property by the Ra of 0.3 μm or more under the condition A3, and at the same time, it is not easy to recognize the generated spark. As a result, the prevention performance of surface flicker is improved. In addition, it is possible to use A2 and A1, RΔq and Rzjis as the aforementioned ranges, so that the shape of the thick curved lens is a sharp sharpness with an elevation of no height, in other words, a small lens, and it is not easy to generate a spark. . Next, in the first aspect, it is possible to multiply the technical idea (RΔq and Rzjis) which is less prone to sparking by narrowing the aforementioned lens, and the technical idea (Ra) which is not easy to recognize the spark. And almost no sparks are seen. As a result, the performance of preventing surface flicker is improved.

Further, the condition A1 can be more difficult to recognize the spark by the Rzjis of 2.0 μm or more, and the spark can be more easily generated by being 3.2 μm or less.

In the condition A2, it is possible to generate a spark more easily by RΔq being 4.5 or more.

In the condition A3, it is possible to more easily recognize the spark by Ra being 0.4 μm or more, and it is possible to prevent the display screen from being easily recognized by Ra being 1.0 μm or less.

In the antiglare film 1 and 1a of the first aspect, it is preferable that the composition satisfies the above (1) and (3) together.

(3) Select one or more of conditions A4, A5, A6 and B

The condition A4 is an Rsm (average pitch) of the surface of the antiglare layer 12 of a predetermined value or less, specifically, a condition of 0.10 mm or less. It is preferably 0.09 mm or less. It is preferably 0.05 mm or more, and particularly preferably 0.06 mm or more. The width of the lens can be reduced by Rsm of 0.10 mm or less, and sparks are less likely to occur. It is possible to prevent the number of lenses from increasing by Rsm of 0.05 mm or more, and it is less likely to generate sparks.

The condition A5 is that the Rz (maximum height) of the surface of the antiglare layer 12 is not more than a predetermined value, specifically, a condition of 4.5 μm or less. It is preferably 4.0 μm or less. It is possible to generate sparks more easily by having an Rz of 4.5 μm or less.

The condition A6 is that Rp (maximum peak) on the surface of the antiglare layer 12 is within a predetermined range, and specifically, is 1.5 μm or more and 2.3 μm or less. The preferred one is 1.6 μm or more and 2.2 μm or less. The spark can be more easily recognized by Rp being 1.5 μm or more, and it is possible to prevent the display screen from being easily recognized by being 2.3 μm or less.

The condition B is a condition in which the turbidity value measured according to JIS K7136:2000, which is the entire anti-glare film 1 and 1a of the anti-glare layer 12, is within a predetermined range, and specifically is 20% or more and 50% or less. It is preferably 25% or more and 45% or less, and particularly preferably 25% or more and 40% or less. It is possible to identify sparks more easily by having a turbidity of 25% or more. It is possible to prevent the display screen from being easily recognized by being 50% or more.

Rsm (average pitch) is a parameter indicating the length average of the contour curve elements of the reference length, and is a parameter of the index of the unevenness interval.

Rz (maximum height) is a parameter indicating the uneven state of the surface of the anti-glare layer 12, similar to Ra.

Rp (maximum peak) is a parameter indicating the peak value of the thickness curve of the reference length.

The antiglare film 1 and 1a of the second aspect satisfy the configuration (2).

(2) Conditions A1, A4 and B

The condition A1 is the same as the condition of the condition A1 of the above (1).

Condition A4 is the same condition as Condition A4 of the above (3).

Condition B is the same as Condition B of the above (3).

In the second aspect, the selection of Rzjis, Rsm, and turbidity values as control parameters is found by experiments: by controlling these parameters, the anti-glare property is improved together and the scintillation performance of the spark is prevented. Specifically, by the conditions A1 and A4, Rzjis and Rsm become the aforementioned ranges, so that the shape of the thick curved lens is narrower than the width of the height without increasing the height, in other words, it becomes a small lens, which is not easy. Produce a spark. In particular, in the condition A4, Rsm becomes 0.05 mm or more, and therefore, the number of lenses is prevented from increasing, and sparks are less likely to occur.

Further, in the condition B, the anti-glare property can be found by the turbidity of 20% or more, and at the same time, the spark is not easily recognized, and as a result, the prevention performance of the surface flicker is improved. It is possible to prevent the display screen from being easily recognized by the turbidity being 50% or less. Then, in the second aspect, it is possible to almost completely not use the multiplication effect between the technical idea (Rziis and Rsm) which is less likely to generate sparks and the technical idea (turbidity) which is not easy to recognize the spark by narrowing down the aforementioned lens. See the spark. As a result, the prevention performance of surface flicker is improved.

Further, in the condition A1, the spark can be more easily recognized by the Rzjis being 2.0 μm or more, and the spark can be more easily generated by being 3.2 μm or less.

In the condition A4, the width of the lens can be reduced by Rsm of 0.09 mm or less, and sparks are less likely to occur.

In the anti-glare film 1 and 1a of the second aspect, it is preferable that the composition also satisfies the above (2) and (4).

(4) One or more selected from the conditions A2, A3, A5 and A6

Condition A2 is the same as Condition A2 of the above (1).

Condition A3 is the same condition as Condition A3 of the above (1).

Condition A5 is the same condition as Condition A5 of the above (3).

Condition A6 is the same as Condition A6 of the above (3).

In the condition A2, the surface R?q (the square mean square root inclination) of the antiglare layer 12 is a predetermined value or more, specifically, a condition of 4 or more. Preferably, it is 4.5 or more, preferably 5 or more, and preferably 10 or less, preferably 6 or less. It is possible to reduce the lens by setting RΔq to 4° or more, and it is less likely to generate a spark.

The condition A3 is Ra (arithmetic mean roughness) on the surface of the antiglare layer 12, and is specifically a condition of 0.3 μm or more and 1.0 μm or less. It is preferably 0.4 μm or more and 1.0 μm or less, and particularly preferably 0.5 μm or more and 0.8 μm or less. It is possible to obtain sufficient anti-glare property by Ra of 0.3 μm or more, and it is more difficult to recognize the spark, and it is more difficult to recognize the display screen by Ra of 1.0 μm or less.

The condition A5 is that the Rz (maximum height) of the surface of the antiglare layer 12 is not more than a predetermined value, specifically, a condition of 4.5 μm or less. It is preferably 4.0 μm or less. It is less likely to generate sparks by having an Rz of 4.5 μm or less.

The condition A6 is an Rp (maximum peak) on the surface of the antiglare layer 12, which is a predetermined range, and is specifically 1.5 μm or more and 2.3 μm or less. The preferred one is 1.6 μm or more and 2.2 μm or less. It is more difficult to identify the spark generated by Rp being 1.5 μm or more, It is 2.3 μm or less to prevent inconvenience in recognizing the display screen.

Further, the aforementioned Rzjis (condition A1), RΔq (condition A2), Ra (condition A3), Rsm (condition A4), Rz (condition A5), and Rp (condition A6) are all expressed in accordance with JIS B0601:2001. The value of the measurement can be measured, for example, using a contact surface roughness measuring machine (SURFCOM 1500 SD2-3DF: Tokyo Precision Co., Ltd.).

The thickness of the antiglare layer 12 is, for example, 3 μm or more, preferably 4 μm or more, preferably 5 μm or more, for example, 9 μm or less, preferably 8 μm or less, or preferably 7 μm or less. However, as will be described later, in the state in which the antiglare layer 12 of the present example is obtained by coating with a particle-containing coating, the thickness of the antiglare layer 12 is preferably set at 40% of the average particle diameter of the particles. Above, below 90%.

The antiglare layer 12 of the present example having the surface properties (surface irregularities) described above can be obtained by, for example, molding by a mold or coating with a particle coating. In addition, the etching or imprinting method is also effective.

In a state in which molding is carried out by a mold, a mold having a composition complementary to the surface unevenness is formed, and a material which constitutes the antiglare layer 12 such as a polymer resin is poured into the mold to be cured, and then the mold is taken out and produced. In the state in which the transparent substrate 11 is used, the polymer resin or the like can be poured into the mold, and the transparent substrate 11 can be adhered to the surface thereof, and then the polymer resin or the like can be cured and taken out from the mold of each of the transparent substrates 11 to be produced.

The method of producing a mold having a shape complementary to the surface unevenness is not particularly limited, and for example, a shape formed by any one of Condition A and Condition B on a concave-convex flat plate by a laser micro-machining technique can be press-formed by the male mold. The form (female model) is the method of enumeration.

In the state of coating with a particle-containing coating material, the anti-glare layer coating liquid containing the particles and the binder resin can be applied onto the transparent substrate 11 and dried.

Examples of the particle system include inorganic particles (for example, ceria, alumina, talc, clay, calcium carbonate, magnesium carbonate, barium sulfate, aluminum hydroxide, titanium oxide, zirconium oxide, etc.) or resin particles (for example, propylene resin particles, ruthenium). Ketone resin particles, nylon resin particles, styrene resin particles, polyethylene resin particles, benzoguanamine resin particles, urethane resin particles, and the like. In order to easily obtain the aforementioned surface properties, it is preferably a resin particle.

The average particle diameter (D) of the particles is preferably 4.0 to 6.0 μm. Further, the coefficient of variation of the particle size distribution is preferably 20% or less (that is, a preferred monodisperse particle). Further, the content of the antiglare layer 12 is preferably 4 to 8 parts by weight based on 100 parts by weight of the binder resin. Further, the thickness of the antiglare layer 12 is preferably 40% or more and 90% or less of the average particle diameter (D) of the particles. It is possible to reduce the ratio of the excessively wide spacing of the lenses by simultaneously satisfying the conditions of these conditions, and it is possible to easily reduce the aforementioned surface properties.

Further, the coefficient of variation of the average particle diameter and the particle size distribution of the resin particles of the present invention is a value measured by a Coulter counter method.

The so-called Coulter counter method is a method for electrically measuring the number and size of particles dispersed in a solution. The particles are dispersed in the electrolyte, and the pores of the electrical flow are passed through the particles by gravity. A method of replacing the electrolyte, increasing the electrical resistance, and measuring the voltage pulse proportional to the particle volume. Therefore, by measuring the height and the number of the voltage pulses electrically, the number of particles and the volume of each particle are measured, and the particle size and particle size distribution are determined.

The coefficient of variation (CV value) is a value indicating the dispersion state of the particle size distribution, and the standard deviation of the particle size distribution (the square root of the dispersion without dispersion) is divided by the arithmetic mean value (average particle diameter) of the particle diameter. The percentage. In other words, it indicates how much the diffusion of the particle size distribution (the deviation of the particle diameter) is relative to the average value (arithmetic mean diameter), usually by the CV value (no unit) = (standard) The quasi-deviation/average value is obtained. The smaller the CV value is, the narrower the particle size distribution is (sharp), and the larger the value, the wider the particle size distribution (wider).

The series of binder resin components of the antiglare layer 12 are, for example, a thermoplastic resin, a thermosetting resin, and an ionizing radiation curing type. Even in these cases, from the viewpoint of scratch resistance, the best one is a thermosetting resin or an ionizing radiation hardening type, and from the viewpoint of easily obtaining the surface properties, the ionizing radiation hardening resin is preferred. .

Examples of the thermosetting resin series include melamine-based, phenol-based, and urethane-based resins.

As the ionizing radiation-curable resin, it is possible to use a radiation that can be crosslinked by irradiation with ionizing radiation (ultraviolet rays or electron beams) ^. The photopolymerizable prepolymer which is hardened is particularly preferably used as the photopolymerizable prepolymer, and has two or more acrylonitrile groups in one molecule for crosslinking ^. A propylene-based prepolymer that is hardened to form a three-dimensional mesh structure. As the propylene-based prepolymerization system, urethane acrylate, polyester acrylate, epoxy acrylate, melamine acrylate, polyfluoroalkyl acrylate, fluorenone acrylate, or the like can be used. Further, these propylene-based prepolymerization systems may be used singly. However, in order to improve the cross-linking hardenability and to increase the hardness of the anti-glare layer 12, it is preferred to add a photopolymerizable monomer.

As the photopolymerizable single system, a monofunctional propylene monomer such as 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate or butoxyethyl acrylate is used, and 1,6 - hexanediol diacrylate, pentaerythritol diacrylate, diethylene glycol diacrylate, polyethylene glycol diacrylate, hydroxytrimethyl acetate, pentaerythritol diacrylate, etc. One or two or more kinds of polyfunctional propylene monomers such as a functional propylene monomer, dipentaerythritol hexaacrylate, trimethylpropane triacrylate, and pentaerythritol triacrylate.

The ionizing radiation hardening type resin is in addition to the aforementioned photopolymerizable prepolymer and light polymerization In addition to the conjugated monomer, it is preferable to use an additive such as a photopolymerization initiator or a photopolymerization accelerator in a state of being cured by irradiation with ultraviolet rays. As a photopolymerization initiator series, acetophenone, benzophenone, Michler's ketone, benzoin, benzyl methyl ketal, benzoquinone benzoate, α-mercapto oxime ester, thioxanthone Classes, etc. The photopolymerization accelerator can alleviate the polymerization barrier caused by the air during hardening and accelerate the hardening speed, and examples thereof include p-dimethylamino benzoic acid isoamyl ester and p-dimethylamino benzoic acid B. Base ester and the like.

Further, as the ionizing radiation curable resin, an ionizing radiation curable organic-inorganic hybrid resin can be used. The ionizing radiation-curable organic-inorganic hybrid resin has a function of floating particles in the anti-glare layer 12, so that RΔq can be improved.

In addition, the so-called ionizing radiation-curable organic-inorganic hybrid resin is different from the former composite represented by glass fiber reinforced plastic (FRP). The mixing of organic matter and inorganic matter is relatively tight, and the dispersion state is molecular level or close to molecular level. The inorganic component and the organic component can be reacted by irradiation of ionizing radiation to form a coating film. The inorganic component of the ionizing radiation-curable organic-inorganic hybrid resin is a metal oxide such as cerium oxide or titanium dioxide. However, it is preferable to use cerium oxide.

Further, in the state in which the ionizing radiation-curable resin is used, a resin having a weight average molecular weight of 10,000 or more is preferably mixed. The surface shape of the present invention can be easily obtained by mixing a resin having a weight average molecular weight of 10,000 or more and reducing the shape of the lens.

The type of the resin having a weight average molecular weight of 10,000 or more is not particularly limited, but it is preferably a propylene resin. The resin having a weight average molecular weight of 10,000 or more is preferably contained in an amount of 10 to 40 parts by weight based on 100 parts by weight of the ionizing radiation-curable resin.

A leveling agent, an ultraviolet absorber, and an oxidation prevention may be added to the anti-glare layer 12. Additives such as agents.

The pencil hardness of JIS-K5400:1990 is preferably H or more, preferably 2H or more, and particularly preferably 3H or more, from the viewpoint of preventing scratches.

The anti-glare layer 12 can be coated on the transparent substrate 11 by a composition comprising the above-mentioned binder resin component or particles constituting the anti-glare layer 12 ^. It is formed by drying and hardening (irradiation or heating of ionizing radiation) as needed.

The anti-glare film 1 and 1a of the present example are formed in the entire anti-glare layer 12 or the films 1 and 1a, and satisfy any of the above (1) and (2), and therefore have anti-glare property and spark identification difficulty. . As a result, the prevention performance of surface flicker is improved.

The anti-glare film 1 and 1a of the present example can be used in a screen (display element) of various display devices (for example, a liquid crystal display device, a CRT display device, a plasma display device, an EL display device, etc.).

The anti-glare film 1 and 1a of the present example may be disposed on the screen of the display device 2 (on the protective plate 22 provided on the display element 21) as shown in FIG. 3, or may be disposed on the screen of the display device 2. (on the resistive film type touch panel or the capacitive touch panel 23 placed on the display element 21). In the display device 2 as described above, since the anti-glare films 1 and 1a of the present example are disposed on the screen, the anti-glare property is provided, and the spark is not seen, and as a result, the surface flicker prevention performance is improved.

Embodiments of the present invention will be described in more detail below with reference to more specific embodiments. Further, in the present embodiment, "parts by weight" and "%" are based on weight unless otherwise indicated.

[Example 1]

Coating on one side of a transparent polyester film (Cosmoshine A350: Toyobo Co., Ltd.) with a thickness of 125 μm ^. The antiglare layer coating liquid a was dried in the following places, and irradiated with ultraviolet rays to form an antiglare layer having a thickness of 4 μm to obtain an antiglare film of Example 1.

<anti-glare layer coating liquid a>

● Ionizing radiation hardening resin composition (solid content 80%) 125 parts by weight

(Unidic 17-813: DIC Corporation)

● Photopolymerization initiator 3 parts by weight

(Irgacure 651: Ciba Japan)

● propylene resin particles 5 parts by weight

(MX-500: Comprehensive Research Chemical Industry Co., Ltd.)

(Average particle size: 5 μm, coefficient of variation: 9%)

● Diluting solvent 200 parts by weight

[Embodiment 2]

The second embodiment was obtained in the same manner as in Example 1 except that the antiglare layer coating liquid a was changed to the following antiglare layer coating liquid b, and the coating conditions were changed to form an antiglare layer having a thickness of 3 μm. Anti-glare film.

<anti-glare layer coating liquid b>

● Ionizing radiation hardening resin composition (solid content 80%) 100 parts by weight

(Unidic 17-813: DIC Corporation)

● propylene resin (solid content 45%) 30 parts by weight

(Acrydic A-815-45: DIC, weight average molecular weight 20,000)

● Photopolymerization initiator 3 parts by weight

(Irgacure 651: Ciba Japan)

● propylene resin particles 6 parts by weight

(MX-500: Comprehensive Research Chemical Industry Co., Ltd.)

(Average particle size: 5 μm, coefficient of variation: 9%)

● Dilution solvent 250 parts by weight

[Comparative Example 1]

The same procedure as in Example 1 was carried out except that the antiglare layer coating liquid a was changed to the following antiglare layer coating liquid c, and the coating conditions were changed to form an antiglare layer having a thickness of 5 μm. Anti-glare film.

<anti-glare layer coating liquid c>

● Ionizing radiation hardening resin composition (solid content 80%) 125 parts by weight

(Unidic 17-813: DIC Corporation)

● Photopolymerization initiator 3 parts by weight

(Irgacure 651: Ciba Japan)

● propylene resin particles 11 parts by weight

(Ganz-paru GM0607S: Ganz Chemical Company)

(Average particle diameter: 6.0 μm, coefficient of variation: 32%)

● Diluting solvent 200 parts by weight

[Comparative Example 2]

The antiglare film of Comparative Example 2 was obtained in the same manner as in Example 1 except that the antiglare layer coating liquid a was changed to the following antiglare layer coating liquid d.

<anti-glare layer coating liquid d>

● Ionizing radiation hardening resin composition (solid content 80%) 125 parts by weight

(Unidic 17-813: DIC Corporation)

● Photopolymerization initiator 3 parts by weight

(Irgacure 651: Ciba Japan)

● propylene resin particles 3 parts by weight

(MX-500: Comprehensive Research Chemical Industry Co., Ltd.)

(Average particle diameter: 5 μm, coefficient of variation: 9%)

● Diluting solvent 200 parts by weight

[Comparative Example 3]

The anti-glare film of Comparative Example 3 was obtained in the same manner as in Comparative Example 2 except that the amount of the propylene resin particles added to the anti-glare layer coating liquid d was 9.3 parts by weight.

[Comparative Example 4]

The same procedure as in Example 1 was carried out except that the antiglare layer coating liquid a was changed to the following antiglare layer coating liquid e, and the coating conditions were changed to form an antiglare layer having a thickness of 4.7 μm. 4 anti-glare film.

<anti-glare layer coating liquid e>

● Ionizing radiation hardening resin composition (solid content 80%) 125 parts by weight

(Unidic 17-813: DIC Corporation)

● Photopolymerization initiator 3 parts by weight

(Irgacure 651: Ciba Japan)

● cerium oxide 7.5 parts by weight

(OK-500: Degussa)

(Average particle diameter: 3.0 μm, polydisperse form)

● Diluting solvent 200 parts by weight

[Comparative Example 5]

An anti-glare layer having a thickness of 5.1 μm was formed by preparing an anti-glare layer coating liquid e of the same composition as that of Comparative Example 4 except that the amount of addition of cerium oxide was changed to 5.5 parts by weight. The anti-glare film of Comparative Example 5 was obtained in the same manner as in Comparative Example 4 except for the same.

[Comparative Example 6]

The same procedure as in Example 1 was carried out except that the antiglare layer coating liquid a was changed to the following antiglare layer coating liquid f, and the coating conditions were changed to form an antiglare layer having a thickness of 6 μm. Anti-glare film.

<anti-glare layer coating liquid f>

● Ionizing radiation hardening resin composition 200 parts by weight

(organic and inorganic mixed form)

(DeSolite 7501: JSR, 50% solids)

● Photopolymerization initiator 3 parts by weight

(Irgacure 651: Ciba Japan)

● cerium oxide 8.5 parts by weight

(OK-500: Degussa)

(Average particle diameter: 3.0 μm, polydisperse form)

● Diluting solvent 200 parts by weight

[Surface shape measurement]

For the anti-glare film obtained in each example, the shape of the surface of the anti-glare layer was measured by the following conditions using a contact type surface roughness measuring machine (SURFCOM 1500 SD2-3DF: Tokyo Precision Co., Ltd.). The average value of the measurement at 10 points is shown in Tables 1 to 3.

<Measurement conditions>

Tip radius of the stylus: 2μm, taper angle of the tip of the stylus: 60 degrees, measuring force: 0.75mN, cutoff value λc: 0.8mm, measuring speed: 0.6mm/s

[turbidity]

The turbidity was measured by a turbidimeter (NDH2000: Nippon Denshoku Industries Co., Ltd.) in accordance with JIS K7136:2000. The results are shown in Table 2.

[Evaluation]

The following evaluation was performed on the antiglare film obtained by each example. The results are shown in Tables 1 and 2.

1. Display screen identification

Dimensions: 3 inches, resolution: 480 × 854 dpi wide VGA liquid crystal display screen, each anti-glare film was placed, and the liquid crystal display screen was observed by visual observation. As a result, the person who can recognize the display well is "○", and the picture is displayed. Those who are not sufficiently identifiable are "X".

2. Spark identification difficulty

Dimensions: 3 inches, resolution: 480 × 854 dpi wide VGA liquid crystal display screen, the entire surface of the green display, after the liquid crystal display screen, each anti-glare film is placed, by visual inspection of the liquid crystal Show the observation of the picture. As a result, the unrecognizable spark is "○", and it can be recognized that some sparks are "X", and the sparker can be clearly identified as "X".

3. Anti-glare

Under the lamp of the three-wavelength fluorescent lamp, each anti-glare film was placed on the black substrate so that the anti-glare layer was positioned above, and the reflection of the fluorescent lamp was evaluated by visual observation. As a result, the outline of the lamp that is not reflected in the fluorescent lamp is "○", and only the micro-integrator is "△".

【Table 2】

The following is understood from Table 1. In the first and second embodiments, Rzjis, RΔq, and Ra satisfy the respective conditions of A1, A2, and A3 of the present invention. Therefore, both the anti-glare property and the spark identification difficulty are good, and the screen visibility is also sufficient.

In Comparative Example 1, RΔq and Ra satisfy the conditions A2 and A3 of the present invention. However, since Rzjis becomes large, the lenses become large and are prone to sparks, making them discernible.

Comparative Examples 2 and 4, Rzjis and Ra, satisfy the conditions A1 and A3 of the present invention. However, since R Δq becomes small, each lens becomes large and a spark is easily generated to make it possible to recognize the spark.

In Comparative Example 3, R?q and Ra satisfy the conditions A2 and A3 of the present invention. Rzjis, who is getting bigger, thinks it is easier to produce sparks, but because Ra is so great, sparks cannot be recognized. However, since Ra is too large, the screen visibility is deteriorated, and it is not suitable as an anti-glare film for a display.

Comparative Example 5 and 6 series Rzjis satisfy the condition A1 of the present invention. R Δq becomes small, but in addition, Rzjis is also very small, and therefore, it is considered that the spark itself does not occur as in Comparative Examples 2 and 4. However, Ra becomes smaller, so the spark generated can be identified.

The following is understood from Table 2. In the first and second embodiments, Rzjis, Rsm, and turbidity satisfy the respective conditions of A1, A4, and B of the present invention. Therefore, both the anti-glare property and the spark identification difficulty are good, and the screen visibility is sufficiently achieved.

Comparative Example 1 is such that Rsm and turbidity satisfy the conditions A4 and B of the present invention. However, since Rzjis becomes large, the lenses become large and are prone to sparks, making them discernible.

Comparative Example 2 is Rzjis and the turbidity satisfies the conditions A1 and B of the present invention. However, Rsm becomes large, and therefore, each lens becomes large and is liable to generate a spark so that the spark can be recognized.

Comparative Example 3 is that Rsm and turbidity satisfy the conditions A4 and B of the present invention. Rzjis, which is getting bigger, thinks it is easier to produce sparks, but because of the high turbidity, sparks cannot be recognized. However, its high turbidity makes the screen visibility worse, and is not suitable as an anti-glare film for displays.

Comparative Example 4 is a condition in which Rzjis and turbidity satisfy the conditions A1 and B of the present invention. However, Rsm becomes smaller, so increasing the number of lenses is prone to sparks, making them discernible spark.

In Comparative Example 5, Rzjis and Rsm satisfy the conditions A1 and A4 of the present invention. Therefore, compared with other comparative examples, it is considered that it is less prone to sparks. However, because the turbidity becomes lower, it makes it possible to recognize the spark.

Comparative Example 6 is that Rzjis satisfies Condition A1 of the present invention. However, Rsm becomes smaller, and in addition to this, the turbidity is also lowered, making it possible to recognize the spark.

1, 1a‧‧‧ anti-glare film

2‧‧‧Display device

11‧‧‧Transparent substrate

12‧‧‧Anti-glare layer

21‧‧‧ Display elements

22‧‧‧protection board

23‧‧‧Touch panel

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing an example of an anti-glare film of the present invention.

Fig. 2 is a cross-sectional view showing another example of the antiglare film of the present invention.

Figure 3 is a cross-sectional view showing an example of the display device of the present invention.

1‧‧‧Anti-glare film

11‧‧‧Transparent substrate

12‧‧‧Anti-glare layer

Claims (8)

An anti-glare film is an anti-glare film having surface irregularities, and is characterized in that the following surface irregularities are used as the following A1 to A4, and the following conditions are satisfied by the conditions of the entire film; Any one of (1) and (2); (1) Conditions A1, A2 and A3; (2) Conditions A1, A4 and B; Condition A1: Rzjis (ten-point average roughness) is 3.4 μm or less; A2: R Δq (quadratic mean square root inclination) is 5° or more; Condition A3: Ra (arithmetic mean roughness) is 0.3 μm or more; Condition A4: Rsm (average pitch) is 0.05 mm or more and 0.10 mm or less Condition B: The haze value is 20% or more and 50% or less (however, the above values in the conditions A1 to A4 are all measured according to JIS B0601:2001, and the above values in the condition B are based on JIS K7136:2000. And the value of the determination). The anti-glare film according to the first aspect of the invention, wherein, when the following A1 and A6 are added as the condition of the surface unevenness, the following (3) is satisfied; 3) one or more selected from the conditions A4, A5, A6, and B; the condition A5: Rz (maximum height) is 4.5 μm or less; and the condition A6: Rp (maximum peak) is 1.5 μm or more and 2.3 μm or less; The above numerical values are all measured according to JIS B0601:2001). The anti-glare film according to the first aspect of the invention, wherein the following (4) is satisfied when the following conditions (5) are satisfied while adding the following A5 and A6 as conditions for the surface unevenness; 4) one or more selected from the conditions A2, A3, A5 and A6; the condition A5: Rz (maximum height) is 4.5 μm or less; Condition A6: Rp (maximum peak) is 1.5 μm or more and 2.3 μm or less; (however, the above numerical values are values measured in accordance with JIS B0601:2001). The anti-glare film according to any one of claims 1 to 3, wherein the anti-glare layer is formed by coating a dry coating on a transparent substrate with a particle-containing coating material, and the anti-glare layer is formed in the anti-glare layer. Forming the aforementioned surface irregularities. The anti-glare film according to the fourth aspect of the invention, wherein the composition satisfies one or more of the following conditions C1 to C4; and the condition C1: the average particle diameter (D) of the particles is 4.0 μm or more and 6.0 μm or less; C2: the coefficient of variation (CV value) of the particles is 20% or less; Condition C3: the content of the particles in the antiglare layer is 4 parts by weight or more and 8 parts by weight or less based on 100 parts by weight of the binder resin; Condition C4: Antiglare The thickness of the layer is 40% or more and 90% or less of the average particle diameter (D) of the particles. The anti-glare film according to the fourth aspect of the invention, wherein the resin particles are used as the particles contained in the particle-containing coating material. The anti-glare film according to the fifth aspect of the invention, wherein the resin particles are used as the particles contained in the particle-containing coating material. A display device characterized in that the anti-glare film according to any one of claims 1 to 7 is disposed on a screen.