KR101949554B1

KR101949554B1 - Display with outer surfacing member, and anti-newton ring sheet

Info

Publication number: KR101949554B1
Application number: KR1020147016951A
Authority: KR
Inventors: 징춘 진; 료헤이 하야카와; 가즈히로 노자와; 요시오 오카모토; 마스오 고야마
Original assignee: 키모토 컴파니 리미티드
Priority date: 2011-12-06
Filing date: 2012-11-21
Publication date: 2019-02-18
Also published as: KR20140099502A; JPWO2013084718A1; CN103959361A; TWI601638B; JP6087292B2; WO2013084718A1; TW201323209A

Abstract

It is an object of the present invention to provide a technique capable of satisfying both Newton ring prevention property and spark prevention property simultaneously.
In order to solve the above problem, the display (4) with the surface member of the present invention is formed by disposing a surface member on the display (1) at intervals, (21) containing particles and a binder resin. The particles have anisotropy with an aspect ratio of not less than 1.2 and not more than 2.0. The particles have an anisotropic property in which the major axis direction is along the direction crossing the thickness direction of the uneven layer (21) Layer (21).

Description

[0001] The present invention relates to a display and an anti-newton ring sheet,

The present invention relates to a display to which a surface member having a surface member disposed on a display is attached, and a Newton ring prevention sheet to be used therefor.

(Surface member) obtained by sticking an interference fringe relieving (anti-Newtoning) sheet having a concavo-convex layer formed of a cured coating on a transparent film to an acrylic plate or the like is applied to an image display apparatus (plasma display apparatus or liquid crystal display apparatus) (Air gap type) in which the concavo-convex layer is disposed in a state of being opposed to the front surface with an interval therebetween (Patent Document 1).

Japanese Patent Laid-Open No. 10-282312

The technique of Patent Document 1 forms a plurality of convex portions formed by centering particles in the uneven layer. As a result, even when a part of the surface member is warped, the spacing between the concavo-convex layer and the image display device is maintained at a certain level or more by the plurality of convex portions, thereby preventing newtoning.

However, in the uneven layer of the technique of Patent Document 1, so-called sparkle occurs in which the luminous points of R, G, and B are enlarged and emphasized by the lens action of the convex portion, and visibility is not sufficient.

In one aspect of the present invention, there is provided a technique capable of satisfying both Newton ring prevention property and spark prevention property simultaneously.

The display with the surface member of the present invention is formed by disposing a surface member on the display with a space therebetween, and the surface member has a surface layer having a concavo-convex layer containing particles and a binder resin on the surface facing the display. The Newton ring-inhibiting sheet of the present invention has an uneven layer containing particles and a binder resin.

The particles in both inventions have anisotropy with an aspect ratio of 1.2 to 2.0, and the particles are present in the uneven layer along a direction in which the major axis direction crosses the thickness direction of the uneven layer.

The present invention includes the following aspects.

The display and the Newton ring prevention sheet to which the surface member of the present invention is attached may use particles having a curved surface portion on the surface and an elliptical shape of the curved surface portion.

The display and the Newton ring-preventing sheet with the surface member of the present invention can contain the particles in the unevenness layer in an amount of not less than 0.5 parts by weight and not more than 5.0 parts by weight based on 100 parts by weight of the binder resin.

The display and the Newton ring-preventing sheet having the surface member of the present invention can use particles having an average particle diameter of 0.5 mu m or more and 8.0 mu m or less.

The display and the anti-Newton ring sheet to which the surface member of the present invention is adhered can have an irregular layer having a thickness of from 0.1 to 3.0 μm and an average particle diameter of 0.2 to 0.8 times the average particle diameter of the contained particles.

The " average particle diameter " is calculated by converting the particle volume measured by the Coulter counter method into spheres.

In the display and the Newton ring-preventing sheet having the surface member of the present invention, a concavo-convex layer having a refractive index difference of 0.2 or less between the binder resin portion and the particle portion may be used.

A touch panel or a shield plate can be used as the surface member of the display with the surface member of the present invention.

The Newton ring-preventing sheet of the present invention can be used in a direction in which a concavo-convex layer is disposed on a surface of a surface member disposed at an interval on the display and facing the display.

The display with the surface member according to the present invention constituted by arranging the surface member at intervals on the display has an uneven layer containing the special shape particles and the binder resin on the surface of the surface member facing the display. Therefore, even if a part of the surface member is warped, the interval between the concavo-convex layer and the display is maintained at a certain level or more, thereby preventing the newtoning. In addition, since the concavo-convex layer is formed by incorporating the particles of the special shape, the angular distribution of the refracted light when passing through the convex portion around the particle can be narrowed. As a result, it contributes to prevention of disturbance of the pixel, that is, spark occurrence, which is caused by broadening the angular distribution of the refracted light.

That is, the display with the surface member of the present invention can simultaneously satisfy the anti-Newton and anti-spark properties.

The anti-Newton ring sheet of the present invention has an uneven layer containing special particles and a binder resin. Therefore, when the Newton ring-preventing sheet of the present invention is used in a direction in which the concavo-convex layer is disposed on the surface facing the display of the surface member disposed at intervals on the display, even if a part of the surface member is warped, . That is, the Newton ring-preventive sheet of the present invention can satisfy the Newton ring preventive property and the Sparkle preventive property at the same time as the display with the surface member attached thereto.

1 is a sectional view showing an example of a display with a surface member of the present invention.
2 is a cross-sectional view showing another example of a display to which the surface member of the present invention is attached.
3 (a) and 3 (b) are diagrams for explaining the difference in the degree of sparkle generation depending on the difference in particle.
Explanation of symbols
4, 4a ... Display with surface member, 1 ... Display, 2 ... Member body (surface member), 21 ... Uneven layer (surface member), 3 ... Newton anti-ring seat, 31 ... Uneven layer, 32 ... Transparent substrate, 33 ... Adhesive layer.

As shown in Figs. 1 and 2, the displays 4 and 4a to which the surface member of the present example is attached are constituted by disposing surface members on the display 1 at intervals. Examples of the display 1 include a liquid crystal display device, a CRT display device, a plasma display device, and an EL display device.

The surface member of this example is not particularly limited in its structure. For example, as shown in Fig. 1, a laminated structure having an uneven layer 21 formed directly on the surface of the member main body 2 may be used. 2, the side of the transparent base material 32 of the anti-Newton ring-containing sheet 3 having the uneven layer 31 on the transparent base material 32 is bonded to the side of the transparent substrate 32 through the adhesive layer 33 2) may be an adhesive (sticking) structure. That is, in this example, a laminate of the member main body 2 and the concavo-convex layer 21 (Fig. 1) as the surface member, the laminate of the member main body 2, the adhesive layer 33 and the anti- 2). Hereinafter, the term " surface member " means any one of the laminate and the laminate.

Examples of the transparent substrate 32 include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyethylene, polypropylene, polystyrene, triacetylcellulose, acrylic and the like. Among these, stretching processing, particularly biaxial stretching, is preferable because the polyethylene terephthalate film is excellent in mechanical strength and dimensional stability. The surface of the transparent substrate 32 may be subjected to a corona discharge treatment or an adhesive layer may be provided to improve adhesion with the uneven layer 31. The thickness of the transparent substrate 32 is generally 25 to 500 占 퐉, preferably 50 to 200 占 퐉.

In order to arrange the surface member of the present example at an interval on the display 1, for example, it is preferable to face the display 1 in a state where a double-faced tape or an adhesive is interposed around the uneven layer 21, 31 side of the surface member It can be fixed. The distance between the surface member and the display 1 differs depending on the size of the display 1 and the type of the member body 2 constituting the surface member, but is usually about 50 탆 to 5 탆.

As the member main body 2 of this example, a protective plate, a touch panel, or the like can be given. Among the member main bodies 2, those having flexibility include those which partially narrow the gap between the member main body 2 and the display 1, such as when the user touches them with a finger, so that interference patterns of light (Newton ring) . Therefore, the present invention exhibits a remarkable effect especially on the member body 2 of the flexible type.

The protective plate as an example can be composed of, for example, a transparent resin plate typified by an acrylic resin plate. The thickness of the protective plate is usually about 0.1 to 2.0 mm.

The method of the touch panel as an example is not particularly limited and can be constituted by, for example, a resistive film type touch panel or a capacitance type touch panel. These touch panels have been shifted from a glass substrate to a plastic substrate at the request of weight reduction. For this reason, recently, the touch panel belongs to a flexible type member. Therefore, it is easy to bend during operation, and when used in the member main body 2, it is easy to generate a Newton ring with the display 1. As described above, the uneven layer 21 shown in Fig. 1 is laminated on the display surface side of the display 1, which is a lower portion thereof, using the touch panel as the member main body 2, or the adhesive layer 33 is formed as shown in Fig. (The direction in which the concavo-convex layer 31 faces the display surface side of the display 1) via the intermediation of the touch panel 3 is very effective in preventing Newton rings that may occur during the operation of the touch panel Valid.

A resistive film type touch panel as an example has an upper electrode having a transparent conductive layer on one side of a transparent substrate and a lower electrode having a transparent conductive layer on one side of the transparent substrate, The conductive layers are opposed to each other and a spacer is interposed therebetween. In this embodiment, the uneven layer 21 may be directly formed on the transparent substrate of the lower electrode with respect to such a resistive film type touch panel. Or by bonding the transparent substrate 32 side of the anti-Newtringing sheet 3 to the transparent substrate of the lower electrode.

The capacitive touch panel as an example includes a plurality of sensor traces of a transparent resistor formed in a first dimension, a plurality of sensor traces of a transparent resistor formed in a second dimension, and a transparent insulating material formed therebetween, As shown in FIG. Further, it is preferable that an insulating layer is provided on at least one of the transparent resistors. In this embodiment, the uneven layer 21 may be formed directly on the transparent resistor of one dimension for the capacitive touch panel. Or the uneven layer 21 may be formed directly on the insulator layer on the one-dimensional transparent resistor. Alternatively, it is also possible to form the side of the transparent base material 32 of the anti-Newton prevention sheet 3 on the transparent resistance body of one dimension or on the insulator layer.

The concavo-convex layers 21 and 31 of this example contain special-shaped particles and a binder resin.

The particles to be contained in the uneven layers 21 and 31 are not particularly limited as long as they have anisotropy with an aspect ratio of 1.2 or more and 2.0 or less, preferably 1.8 or less. For example, a rugby ball shape, a mushroom shape, a flat shape, an elliptical shape, and a spheroidal shape. The particles used in this example include not only primary particles but also agglomerates of some particles (secondary particles). Thus, the range of the aspect ratio is based on primary particles or secondary particles.

As a commercially available product corresponding to a special shape particle, for example, a trade name " TECH POLYMER " (manufactured by Sekisui Chemical Co., Ltd.) exists.

The term " anisotropy " means not physically isotropic but means that the particles are physically directional, that is, the particles used in this example have an aspect ratio in the predetermined range. The " aspect ratio " means the ratio of the length to the width of a circumscribed rectangle (the minimum rectangle when the particle figure is enclosed by a rectangle), and this value can be measured by, for example, a particle size distribution image analyzer.

In this example, the surface members of the present example including the uneven layers 21 and 31 are arranged on the display 1 with an interval by constructing the uneven layers 21 and 31 by containing special shaped particles, As a result, even if the space between the display panel 1 and the member body 2 constituting the surface member is narrowed, it is possible to simultaneously prevent occurrence of Newton ring and prevention of sparkle.

The reason why the occurrence of both Newton ring and sparkle phenomenon can be prevented when the particles of the special shape are contained in the concave-convex layers 21 and 31 as described above is considered as follows.

Light generated from the display 1 is refracted when it passes through a convex portion which is usually centered on the particle. Here, when spherical particles (corresponding to the comparative example of the present invention) having an aspect ratio of less than 1.2 are used, the angular distribution of light refracted at the convex portions is widened as shown in Fig. 3 (a). On the other hand, when particles having an aspect ratio of 1.2 or more (corresponding to the embodiment of the present invention) are used, the angular distribution of light refracted by the convex portions becomes narrow as shown in Fig. 3 (b). The difference in the slope of the convex portion due to the aspect ratio affects this difference. The " sparkle " is a phenomenon in which a pixel generated by refraction of light at the convex portion is disturbed. When the aspect ratio is 1.2 or more, the angular distribution of the refracted light can be narrowed so that the disturbance of the pixel can be reduced .

On the other hand, the anti-Newtonian property is an effect obtained by forming convex portions by the particles and maintaining the gap with the facing surfaces. Therefore, particles having an aspect ratio of 1.2 or more have such an effect. However, if the aspect ratio exceeds 2.0, the interval between the facing surface and the facing surface can not be maintained sufficiently depending on the direction of the particles, and the anti-Newtoning property becomes insufficient. Therefore, in this example, the upper limit of the aspect ratio is 2.0. And the upper limit of the aspect ratio is preferably set to 1.8 from the viewpoint of obtaining a relatively satisfactory Newton ring resistance.

The particles used in this example may be composed of any of inorganic (inorganic particles) and organic (resin particles). Particularly, the resin particles are suitable in that the difference in refractive index between the binder resin and the binder resin is easily reduced, thereby making it easy to prevent whitening and sparkling of the coating film (the concavo-convex layers 21 and 31). Examples of the inorganic particles include silica, alumina, talc, clay, calcium carbonate, magnesium carbonate, barium sulfate, aluminum hydroxide, titanium dioxide and zirconium oxide. Examples of the resin particles include acrylic resin particles, silicone resin particles, nylon resin particles, styrene resin particles, polyethylene resin particles, benzoguanamine resin particles, and urethane resin particles.

The particles used in this example preferably have an average particle size of at least 0.5 mu m, more preferably at least 0.8 mu m, even more preferably at least 1.5 mu m, particularly preferably at least 2.0 mu m, most preferably at least 2.5 mu m. By using particles having a special shape (a range of the above aspect ratio) and an average particle diameter of 0.5 탆 or more, it is easy to exhibit the Newton ring preventing action on the uneven layers 21 and 31. The average particle diameter is preferably not more than 8.0 占 퐉, more preferably not more than 5.0 占 퐉, still more preferably not more than 4.0 占 퐉, particularly preferably not more than 3.0 占 퐉, and most preferably not more than 2.7 占 퐉. By using particles having a special shape and an average particle diameter of 8.0 mu m or less, it is easy to exhibit sparkle prevention action on the uneven layers 21 and 31. The " average particle diameter " is calculated by converting the particle volume measured by the Coulter counter method into spheres. For this reason, the particles of the special shape used in this example have larger values on the longer side than on average and smaller ones on the shorter side.

It is preferable that the particle used in this example has a curved surface portion on its surface and that its curved surface portion is elliptic. It is easy to prevent damage to the member main body 2 opposed to the uneven layers 21 and 31 by including the curved surface portion on the surface of the particles. In addition, when the curved portion has an elliptical shape, the angular distribution of the light refracted by the convex portion is narrower than in the case where the curved portion has a circular shape, making it difficult to generate sparkle.

The phrase " including a curved surface portion on the particle surface " means that at least part of the particle surface is a curved surface. Even if you have a flat part on the surface of the particle, you can have another part of the surface.

The content of the particles used in this example is preferably at least 0.5 part by weight, more preferably at least 1.0 part by weight, preferably at most 5.0 parts by weight, more preferably at most 4.0 parts by weight, based on 100 parts by weight of the binder resin More preferably 3.0 parts by weight or less, particularly preferably 2.5 parts by weight or less. By setting the content in the uneven layers 21 and 31 to 5.0 parts by weight or less, it becomes easy to make the spark preventing property and the transparency to be good easily. By making the content 0.5 parts by weight or more, occurrence of Newton ring can be easily prevented.

Examples of the binder resin include a polyester resin, an acrylic resin, an acrylic urethane resin, a polyester acrylate resin, a polyurethane acrylate resin, an epoxy acrylate resin, a urethane resin, an epoxy resin, a polycarbonate resin, , A thermoplastic resin such as an acetal resin, a vinyl resin, a polyethylene resin, a polystyrene resin, a polypropylene resin, a polyamide resin, a polyimide resin, a melamine resin, a phenol resin, a silicone resin, Thermosetting resin, ionizing radiation curable resin, and the like. Of these, an ionizing radiation curable resin having excellent surface hardness is preferable.

The uneven layers 21 and 31 of the present embodiment may further contain additives such as a leveling agent, an ultraviolet absorber, and an antioxidant.

In order to form the concavo-convex layers 21 and 31 of this embodiment, for example, a coating solution in which a binder resin is dissolved and an appropriate component is blended is applied to the surface of the member main body 2 and the transparent base member 32, To remove the solvent and to coat the resin. At that time, the above-mentioned special shape particles may be coated and dispersed in the coating liquid of the resin. Alternatively, a coating solution of a resin different from the coating solution of the binder resin may be prepared, and the coating solution may be applied to the surfaces of the member main body 2 and the transparent base member 32. As the solvent used for the coating solution, any solvent may be used as long as it can be used as a coating solution for coating.

As a coating method for the concave-convex layers 21 and 31, any method may be used for coating the surfaces of the member body 2 and the transparent substrate 32 with a coating solution. For example, a bar coater, a die coater, A method using a coater, a spin coater, a roll coater, a gravure coater, a flow coater, a spray, and a screen printing.

In this example, at least one coating liquid containing binder resin and particles adopted so that the difference in refractive index between the binder resin portion and the particle portion in the uneven layers 21 and 31 is within 0.2, It is preferable to form a film.

The uneven layer 21 or 31 formed after coating such a coating liquid on the member main body 2 or the transparent base member 32 and dried or the uneven layer 21 formed after the application liquid is dried and irradiated with ionizing radiation , 31), when the difference in refractive index between the binder resin portion and the particle portion is within 0.2, the problem of the whiteness of the coating film and the problem of the sparkle can be easily prevented.

Any method may be used as a method for curing the resin when an ionizing radiation curable resin is used for the binder resin. Among them, it is preferable to irradiate ultraviolet rays and cure them to form a film. In this case, a light source such as a high-pressure mercury lamp, a low-pressure mercury lamp, an ultra-high-pressure mercury lamp, a metal halide lamp, a carbon arc or a xenon arc can be used.

In the inside of the uneven layers 21 and 31 formed by the above method, the particles used in this example are arranged along a direction in which the major axis direction crosses (preferably orthogonal to) the thickness direction of the uneven layers 21 and 31 . When the coating liquid is applied from the specificity of the particle shape used in this example and after a while, it tends to become a mechanically more stable state by itself, so that its major axis direction is along the direction crossing the thickness direction of the uneven layers 21, (2) or the surface of the transparent substrate (32). By arranging the particles in the concave-convex layers 21 and 31 as described above, the occurrence of Newton rings can be prevented, and at the same time, the angular distribution of the light refracted by the convex portions becomes narrow as shown in Fig. 3 (b) And it is possible to contribute to prevention of sparkle. That is, both the Newton ring and the sparkle can be prevented from occurring.

The thickness of the concavo-convex layers 21 and 31 (the thickness of the portion made of only the binder resin except the particles) is preferably 0.1 占 퐉 or more, more preferably 0.5 占 퐉 or more, still more preferably 0.8 占 퐉 or more, Mu m or more, preferably 3.0 mu m or less, more preferably 2.5 mu m or less, further preferably 2.2 mu m or less, particularly preferably 1.8 mu m or less. In particular, from the viewpoint of preventing the occurrence of Newton ring, the average particle diameter of the particles is preferably 0.8 times or less, more preferably 0.6 times or less, and still more preferably 0.5 times or less. Also, when the thickness of the uneven layers 21 and 31 is designed to be more than 0.2 times, more preferably not less than 0.3 times, and more preferably more than 0.4 times (0.4 times) the average particle diameter of the above-mentioned particles , And it is easy to prevent the particles from falling out of the uneven layers (21, 31).

As described above, according to this example, the surface member (member main body 2 + uneven layer 21 or member main body 2 + adhesive layer 33 + Newton ring-preventing sheet 3 The display 4, 4a having the surface member constituted by disposing the surface members 21, 31 has the uneven layers 21, 31 of this example on the surface of the surface member facing the display 1. Therefore, even if a part of the surface member is warped, the gap between the concavo-convex layers 21 and 31 and the display 1 is maintained at a certain level or more, thereby preventing the Newton ring. In addition, since the irregularities 21 and 31 are formed by incorporating particles of a special shape, the angular distribution of the refracted light when passing through the convex portion around the particle can be narrowed. As a result, it contributes to prevention of occurrence of sparkle of a pixel caused by broadening of the angle distribution of refracted light. That is, the display 4 or 4a with the surface member of the present example can simultaneously satisfy the anti-Newton ring property and anti-sparkle property.

Example

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in more detail with reference to embodiments. In the present embodiment, " part " and "% " are by weight unless otherwise indicated.

[Example 1]

On one side of a transparent polyester film (Cosmo Shine A4350: Toyo Boseki Co., Ltd.) having a thickness of 125 占 퐉, a coating liquid a of the following formulation was applied, dried and irradiated with ultraviolet rays to form a concavo-convex layer having a thickness of 1.2 占 퐉, A sheet was obtained. The refractive index difference between the ionizing radiation curable resin and the particles incorporated in the coating liquid of this example was within 0.2.

&Lt; Coating liquid a &

· Ionizing radiation curable resin (solid content 80%) 42 parts

(Unidick 17-813: DIC)

Photopolymerization initiator 1.34 parts

(Irgacure 651: Chiba, Japan company)

· Acrylic resin particles 0.67 part

(Tech polymer 67BT: Sekisui Chemical Co., Ltd., rugby ball shape)

(Average particle diameter: 2.64 mu m, refractive index: 1.49, aspect ratio: 1.2 to 1.8)

(An elliptical curved surface portion)

Dilution solvent 245 parts

[Example 2]

An anti-Newton ring sheet of this example was obtained in the same manner as in Example 1, except that the acrylic resin particles of the coating liquid a were changed to the following. The refractive index difference between the ionizing radiation curable resin and the particles incorporated in the coating liquid of this example was within 0.2.

· Acrylic resin particles

(Tech polymer 69BT: Sekisui Chemical Co., Ltd., machine room shape)

(Average particle diameter: 2.53 mu m, refractive index: 1.49, aspect ratio: about 1.2 to 1.6)

(The head portion of the machine room is an elliptical curved surface portion)

[Example 3]

· Acrylic resin particles

(Tech polymer 68BT: Sekisui Chemical Co., Ltd., hemispherical shape)

(Average particle diameter: 2.67 mu m, refractive index: 1.49, aspect ratio: 2.0)

(Rounded curved surface portion)

[Example 4]

An anti-Newton ring sheet of this example was obtained in the same manner as in Example 1, except that the acrylic resin particles of the coating liquid a were changed to the following. The refractive index difference between the ionizing radiation curable resin and the particles incorporated in the coating liquid of this example exceeded 0.2.

· Inorganic particles (silica)

(Rugby ball shape)

(Average particle diameter: 2.65 mu m, refractive index: 1.46, aspect ratio: about 1.4 to 1.8)

(Designed so as to have an elliptical curved surface).

[Comparative Example 1]

An anti-Newton ring sheet of this example was obtained in the same manner as in Example 1, except that the acrylic resin particles of the coating liquid a were changed to the following.

· Acrylic resin particles

(MX-300: manufactured by Soken Chemical & Engineering Co., Ltd., Jingu)

(Average particle diameter: 3.0 mu m, refractive index: 1.49, aspect ratio: 1.0)

[Comparative Example 2]

· Acrylic-silicone hybrid resin particles

(Silcurusta MK03: Nikkorica, star candy shape)

(Average particle diameter: 3.0 mu m, aspect ratio: 1.0)

[Comparative Example 3]

· Acrylic resin particles

(Rugby ball shape)

(Average particle diameter: 2.14 mu m, refractive index: 1.49, aspect ratio: 3.0)

(Designed so as to have an elliptical curved surface).

[Production of display with surface member attached]

The Newton ring prevention sheet obtained by each example was bonded to the back surface of the capacitive touch panel via a commercially available adhesive (OCA: Optical Clear Adhesive). Next, a capacitive touch panel was provided so that the concavo-convex layer was opposed to the liquid crystal display with a gap of 0.3 mm therebetween to obtain a display with the surface members of each example.

[evaluation]

The following evaluation was made on the display or the anti-Newton ring sheet with the surface member obtained by each example. The results are shown in Table 1.

1. Newton Ring

The state of occurrence of Newton rings when the surface of the touch panel of the display with the surface member was lightly contacted with a finger was visually observed. As a result, "Newton ring" was shown as "○" and Newton ring was shown as "×".

2. Sparkle

The liquid crystal display screen of the display with the surface member attached was displayed as a front green display, and the state of occurrence of sparkle was visually observed. As a result, it was determined that the sparkle was not seen as "? &Quot;, the sparkle was slightly seen but not disturbed and the sparkle was seriously seen as " x ".

The samples of Examples 1 to 4 contained new particles in the unevenness layer with the aspect ratio of the present invention, and thus they were able to sufficiently inhibit sparkle while having Newton ring-preventing properties. Particularly, in Examples 1 and 2, the particles contained in the concavo-convex layer contained a curved portion on the surface, and the portion was an elliptical shape, which was particularly excellent in suppressing sparkle. In Example 4, particles having an aspect ratio within the scope of the present invention and including a curved surface portion on the surface thereof and having the portion in an elliptical shape were used. However, since the particle material is inorganic (silica), the difference in refractive index from the resin is 0.2 It was determined that there was no problem in practical use although the occurrence of sparkle was confirmed to be slight.

The existence of particles in the uneven layer was observed using an electron microscope (SEM), and it was found that the particles of Examples 1 to 4 exhibited a long axis direction in the direction perpendicular to the thickness direction of the uneven layer (that is, ), It was confirmed that the particles were present in the uneven layer.

On the other hand, in Comparative Examples 1 and 2, since the aspect ratio of the particles in the unevenness layer was 1.0 (lower than the lower limit of the range of the present invention), it was possible to inhibit sparkle while having anti-Newton ring property. In Comparative Example 3, since the aspect ratio of the particles in the concavo-convex layer was 3.0 (exceeding the upper limit value in the range of the present invention), sparkle could be suppressed, but Newton ring-preventing property could not be exhibited.

[Example 5]

A Newton prevention sheet of the present example was obtained in the same manner as in Example 1, except that the content of the acrylic resin particles in the coating liquid a (content in terms of weight with respect to 100 parts by weight of the solid content of the ionizing radiation curable resin) was changed to 5.5 parts by weight. Also, a display having a surface member was manufactured in the same manner as described above. Next, the above evaluation was carried out. As a result, in this example, particles having an aspect ratio falling within the scope of the present invention and having a curved surface portion on the surface thereof and having an elliptical shape were used, but since the content of the particles tended to be excessively large, ) And a slight sparkle was confirmed, but it was judged that there was no problem in practical use.

[Example 6]

An anti-Newton ring sheet of this example was obtained in the same manner as in Example 1, except that the content of the acrylic resin particles in the coating liquid a was changed to 0.4 part by weight based on 100 parts by weight of the solid content of the ionizing radiation curable resin. Also, a display having a surface member was manufactured in the same manner as described above. Next, the above evaluation was carried out. As a result, in the present example, particles having an aspect ratio falling within the range of the present invention and including a curved surface portion on the surface thereof and having the shape of an elliptical shape were used, but since the content of the particles tended to be small, sparkling could be suppressed The occurrence of some Newton rings was confirmed. However, it was judged that there was no problem in the occurrence of this degree.

[Example 7]

As the acrylic resin particles to be mixed with the coating liquid a, an average particle diameter of 0.3 mu m and a refractive index of 1.49 (with an aspect ratio in the range of 1.2 to 2.0) were prepared and in the same manner as in Example 1 except that this was used, A ring-preventive sheet was obtained. Also, a display having a surface member was manufactured in the same manner as described above. Next, the above evaluation was carried out. As a result, although the aspect ratio of this example was within the scope of the present invention, the particle diameter tended to be small, and sparkle could be suppressed, however, slight occurrence of Newton ring was confirmed. However, it was judged that there was no problem in the occurrence of this degree.

[Example 8]

As the acrylic resin particles to be mixed with the coating liquid a, an acrylic resin particle having an average particle diameter of 8.5 탆 and a refractive index of 1.49 (with an aspect ratio within a range of 1.2 to 2.0) was prepared and used in the same manner as in Example 1, A ring-preventive sheet was obtained. Also, a display having a surface member was manufactured in the same manner as described above. Next, the above evaluation was carried out. As a result, although the aspect ratio of the present example was within the scope of the present invention, since the particle diameter tended to be large, the occurrence of Newton ring could be suppressed, but slight occurrence of sparkle was confirmed. However, it was judged that there was no problem in the occurrence of this degree.

Claims

A display with a surface member on which a surface member is disposed with an interval therebetween, characterized in that the surface member has an uneven layer containing particles and a binder resin on a surface facing the display,
The particles have anisotropy with an aspect ratio of 1.2 to 2.0,
Wherein the particles are present in the uneven layer along a direction in which the major axis direction intersects the thickness direction of the uneven layer.

The method according to claim 1,
Wherein the particle has a curved surface portion on its surface and the curved surface portion has an elliptic shape.

3. The method according to claim 1 or 2,
Wherein the content of the particles in the uneven layer is 0.5 to 5.0 parts by weight based on 100 parts by weight of the binder resin.

3. The method according to claim 1 or 2,
Wherein the particles have an average particle diameter of 0.5 mu m or more and 8.0 mu m or less.

5. The method of claim 4,
Wherein the concavo-convex layer has a thickness of not less than 0.1 占 퐉 and not more than 3.0 占 퐉 and not less than 0.2 times and not more than 0.8 times the average particle diameter of the contained particles.

3. The method according to claim 1 or 2,
Wherein the difference between the refractive index of the binder resin portion and the refractive index of the particle portion in the uneven layer is within 0.2.

3. The method according to claim 1 or 2,
Wherein the surface member is a touch panel or a protective plate.

An anti-Newton ring sheet having an uneven layer containing particles and a binder resin,
The particles have anisotropy with an aspect ratio of not less than 1.2 and not more than 2.0,
Wherein the particles are present in the uneven layer along a direction in which the major axis direction crosses the thickness direction of the uneven layer.

9. The method of claim 8,
Wherein the particle has a curved surface portion on its surface and the curved surface portion has an elliptic shape.

10. The method according to claim 8 or 9,
Wherein the content of the particles in the uneven layer is 0.5 to 5.0 parts by weight based on 100 parts by weight of the binder resin.

10. The method according to claim 8 or 9,
Wherein the particles have an average particle diameter of 0.5 占 퐉 or more and 8.0 占 퐉 or less.

12. The method of claim 11,
Wherein the uneven layer has a thickness of not less than 0.1 占 퐉 and not more than 3.0 占 퐉 and not less than 0.2 times and not more than 0.8 times the average particle diameter of the contained particles.

10. The method according to claim 8 or 9,
Wherein the difference in refractive index between the binder resin portion and the particle portion in the uneven layer is within 0.2.

10. The method according to claim 8 or 9,
A Newton ring-preventing sheet used in a direction in which a concavo-convex layer is disposed on a surface of a surface member disposed at an interval on a display and facing the display.