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Anti-dazzle film

An anti-glare film and anti-glare layer technology, applied in optics, instruments, optical components, etc., can solve the problem of reducing the anti-glare performance of the display surface, and achieve the effect of suppressing whitening and dazzling, and fully anti-glare.

Inactive Publication Date: 2015-08-12
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the anti-glare film disclosed in Patent Document 1, if the haze is to be further reduced (if low haze is to be achieved), the image display device equipped with the anti-glare film may be viewed obliquely. Reduced anti-glare performance
Therefore, the antiglare film disclosed in Patent Document 1 still has room for improvement in terms of antiglare properties at wide viewing angles.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0307] (Preparation of molds for anti-glare film production)

[0308] A material obtained by performing repeated copper plating (copper バラードめっき) on the surface of an aluminum roll (A6063 based on JIS) having a diameter of 300 mm was prepared. The repetitive copper plating consists of copper plating / thin silver plating / surface copper plating, and the thickness of the entire plating is set to about 200 μm. The copper-plated surface was mirror-polished, and a photosensitive resin was applied and dried on the polished copper-plated surface to form a photosensitive resin film. Next, using the laser will be Figure 13 The pattern in which the pattern A shown above was repeatedly arranged was exposed on the photosensitive resin film, and it developed. Exposure and development by laser were performed using Laser Stream FX (manufactured by Think Laboratory Co., Ltd.). As the photosensitive resin film, a resin film containing a positive photosensitive resin was used. Here, pattern A...

Embodiment 2

[0322] In addition to the use of lasers will be Figure 14 Except for exposing the pattern formed by repeating the pattern B shown on the photosensitive resin film, the mold B was produced in the same manner as the production of the mold A in Example 1, and the mold A was replaced with the mold B. An antiglare film was produced in the same manner as in Example 1. This antiglare film was referred to as antiglare film B. Here, pattern B is made by passing a pattern with random brightness distribution through a plurality of Gaussian function type band-pass filters, the aperture ratio is 40%, and the one-dimensional power spectrum is at a spatial frequency of 0.002 μm. -1 The intensity under Γ(0.002) and the spatial frequency 0.01μm -1 The ratio Γ(0.01) / Γ(0.002) of the intensity Γ(0.01) is 3.7, and the spatial frequency is 0.002μm -1 The intensity under Γ(0.002) and the spatial frequency 0.02μm -1 The intensity Γ(0.02) under the ratio Γ(0.02) / Γ(0.002) is 0.3, and the spatial f...

Embodiment 3

[0324] In addition to the use of lasers will be Figure 15 Except for exposing a pattern formed by repeating the pattern C shown on the photosensitive resin film, the mold C was produced in the same manner as the production of the mold A in Example 1, and the mold A was replaced with the mold C. An antiglare film was produced in the same manner as in Example 1. Let this antiglare film be antiglare film C. Here, pattern C is made by passing a pattern with random brightness distribution through a plurality of Gaussian function-type bandpass filters with an aperture ratio of 45%, and a one-dimensional power spectrum at a spatial frequency of 0.002 μm. -1 The intensity under Γ(0.002) and the spatial frequency 0.01μm -1 The ratio Γ(0.01) / Γ(0.002) of the intensity Γ(0.01) is 3.5, and the spatial frequency is 0.002μm -1 The intensity under Γ(0.002) and the spatial frequency 0.02μm -1 The ratio Γ(0.02) / Γ(0.002) of the intensity Γ(0.02) is 0.42, and the spatial frequency is 0.002μm...

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Abstract

The purpose of the invention is to provide an anti-dazzle film. The anti-dazzle film has excellent anti-dazzle performance within wide observation angle even at low haze degree and the anti-dazzle film can fully inhibit the occurrence of efflorescence and halation when the anti-dazzle film is configurated in a image display device. The anti-dazzle film provided by the invention comprises a transparent bearing body and an anti-dazzle layer that is formed on the bearing body and that is provided with a fine surface concave-convex shape, wherein the total haze degree of the anti-dazzle film is between 0.1% to 3%; the surface haze degree is between 0.1% to 2%; the kurtosis Pku of a roughness curve of the surface concave-convex shape is lower than 4.9; the strength ratios of the power spectra of the complex amplitudes calculated from the elevation of the surface concave-convex shape and the refractive index of the anti-dazzle layer under two specific spatial frequency are respectively located within the given ranges.

Description

technical field [0001] The present invention relates to an antiglare film excellent in antiglare properties. Background technique [0002] For image display devices such as liquid crystal displays, plasma display panels, Braun tube (cathode ray tube: CRT) displays, and organic electroluminescent (EL) displays, in order to avoid Deterioration of visibility (visibility), an anti-glare film is disposed on the display surface. [0003] As an anti-glare film, a transparent film having a surface unevenness has been mainly considered. Such an anti-glare film exhibits anti-glare properties by reducing the reflection of external light by scattering and reflecting external light (external light scattered light) by using the uneven shape of the surface. However, when the scattered light from external light is strong, the entire display surface of the image display device may be whitish and the displayed color may not be clear, so-called "whitening (白ちゃけ)" may occur. In addition, the...

Claims

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Application Information

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IPC IPC(8): G02B5/02
CPCG02B5/0221
Inventor 古谷勉
Owner SUMITOMO CHEM CO LTD
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