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Anti-glare film

An anti-glare film and anti-glare layer technology, applied in optics, instruments, optical components, etc., can solve problems such as the reduction of anti-glare properties, and achieve the effect of suppressing whitening and dazzling

Inactive Publication Date: 2016-02-10
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the anti-glare film disclosed in Patent Document 1 is to further reduce the haze (to make the haze low), there will be a problem when viewing the display surface of the image display device on which the anti-glare film is arranged obliquely. The case where the anti-glare property decreases
Therefore, the antiglare film disclosed in Patent Document 1 still has room for improvement in terms of antiglare properties at large viewing angles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0220] (Preparation of molds for anti-glare film production)

[0221] The material which gave the ballard copper plating to the surface of the aluminum roll (A6063 based on JIS) of diameter 300mm was prepared. Ballard copper plating consists of copper plating / thin silver plating / surface copper plating, with a total thickness of approximately 200μm. The copper-plated surface is mirror-polished, and a photosensitive resin is applied to the polished copper-plated surface and dried to form a photosensitive resin film. Then, repeat the array Figure 9 The pattern obtained by the pattern shown in was exposed and developed with laser light on the photosensitive resin film. Exposure and development by laser light were performed using Laser Stream FX [manufactured by Think Laboratory]. A positive type resin is used as the photosensitive resin. Figure 9 The pattern shown in is a pattern made by passing a plurality of Gaussian function-type band-pass filters from a pattern wit...

Embodiment 2

[0231] In addition to repeating the Figure 10 A mold was produced in the same manner as the production of the mold in Example 1, except that the pattern obtained by the pattern shown in was exposed on the photosensitive resin film with a laser. An anti-glare film was produced by the same method as the production of the anti-glare film of Example 1 except using this mold. Let the obtained antiglare film be antiglare film B. Figure 10 The pattern shown in is a pattern made by passing a plurality of Gaussian function-type band-pass filters from a pattern with a random brightness distribution. The aperture ratio is 50%. Calculated from the one-dimensional power spectrum of the pattern average frequency of and standard deviation σ f 0.091μm respectively -1 and 0.106μm -1 .

Embodiment 3

[0233] In addition to repeating the Figure 11 A mold was produced in the same manner as the production of the mold in Example 1, except that the pattern obtained by the pattern shown in was exposed on the photosensitive resin film with a laser. An anti-glare film was produced by the same method as the production of the anti-glare film of Example 1 except using this mold. Let the obtained antiglare film be antiglare film C. Figure 11 The pattern shown in is a pattern with a random brightness distribution, which is made into a pattern of 0 by passing it through a plurality of Gaussian function-type bandpass filters. The aperture ratio is 40%. According to the one-dimensional power spectrum of the pattern Calculated average frequency and standard deviation σ f 0.092μm respectively -1 and 0.109μm -1 .

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Abstract

The invention provides an anti-glare film which is low in haze but has an excellent anti-glare property in a wide viewing angle, and when disposed in an image display apparatus, the anti-glare film is capable of sufficiently suppressing the occurrence of whitening and glare. The anti-glare film is provided with a transparent support; and an anti-glare layer formed on the support and provided with superfine surface irregularities, wherein the total haze is higher than 0.1% and lower than 3%, the surface haze is higher than 0.1% or lower than 2%, the peak Rk[mu] of roughness curves of the surface irregularities is lower than 4.9, the average value of the areas of polygons formed in a Voronoi division process with top points of convex portions of the surface irregularities serving as generators is higher 50 [mu]m2 and lower than 150 [mu]m2, variation coefficients of the areas of the polygons are higher than 40% or lower than 80%.

Description

technical field [0001] The present invention relates to an antiglare film excellent in antiglare properties. Background technique [0002] Image display devices such as liquid crystal displays, plasma display panels, Braun tube (cathode ray tube: CRT) displays, organic electroluminescent (EL) displays, in order to prevent deterioration of visibility caused by external light shining on the display surface , an anti-glare film is disposed on the display surface. [0003] As an anti-glare film, a transparent film having an uneven surface has been mainly studied. This anti-glare film exhibits anti-glare properties by scattering and reflecting external light (external light scattering light) by its surface unevenness to reduce reflection. However, in the case of strong external light scattering, so-called "whitening" may occur in which the entire display surface of the image display device turns white or the display becomes an unclear color. In addition, so-called "glare" in w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02B1/10G02B27/00
Inventor 福井仁之山口智之古谷勉
Owner SUMITOMO CHEM CO LTD
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