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Antiglare film

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

Inactive Publication Date: 2016-07-13
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
Comparison scheme
Effect test

Embodiment 1

[0248] (Preparation of molds for anti-glare film production)

[0249] A material obtained by performing ballard copper plating on the surface of an aluminum roll (A6063 based on JIS) with a diameter of 300 mm was prepared. Ballard copper plating consists of copper plating / thin silver plating / surface copper plating, and the overall thickness of the 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 12 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 were performed by laser using Laser Stream FX (manufactured by Think Laboratory). As the photosensitive resin film, a resin film containing a positive photosensitive resin was used. Here, pattern A is made by passing a pattern with r...

Embodiment 2

[0259] In addition to the use of lasers will be Figure 13 Mold B was produced in the same manner as in Example 1, except that the pattern in which the pattern B shown was repeatedly arranged was exposed on the photosensitive resin film, and the same as in Example 1 except that the mold A was replaced with the mold B. An anti-glare film was produced. This antiglare film was referred to as antiglare film B. Here, pattern B is made by passing a pattern with random luminance distribution through a plurality of Gaussian function type band-pass filters with an aperture ratio of 50%, and a one-dimensional power spectrum at a spatial frequency of 0.01 μm. －1 The intensity at Γ(0.01) is the same as that at the spatial frequency 0.02μm －1 The intensity Γ(0.02) at the ratio Γ(0.02) / Γ(0.01) is 0.12, at the spatial frequency 0.01μm －1 The intensity at Γ(0.01) is the same as that at the spatial frequency 0.1μm －1 The ratio of intensity Γ(0.1) at Γ(0.1) / Γ(0.01) is 11.85.

Embodiment 3

[0261] In addition to the use of lasers will be Figure 14 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 40%, and a one-dimensional power spectrum at a spatial frequency of 0.01 μm. －1The intensity at Γ(0.01) is the same as that at the spatial frequency 0.02μm －1 The intensity Γ(0.02) at the ratio Γ(0.02) / Γ(0.01) is 0.11, at the spatial frequency 0.01μm －1 The intensity at Γ(0.01) is the same as that at the spatial frequency 0.1μm －1 The ratio of intensity Γ(0.1) at Γ(0.1) / Γ(0.01) is 11.43.

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Abstract

Provided is an antiglare film that has excellent antiglare properties at a wide observation angle even with a low haze, and that can sufficiently suppress the occurrence of white turbidity and glare when arranged on an image display device. The antiglare film comprises a transparent support body, and an antiglare layer formed thereon and having fine surface irregularities, wherein the total haze is from 0.1% to 3% inclusive; the surface haze is from 0.1% to 2% inclusive; the kurtosis Rku of the roughness curve of the surface irregularities is 4.9 or less; and intensities I (0.01), I (0.02), and I (0.1) at a spatial frequency of 0.01 [mu]m<-1>, a spatial frequency of 0.02 [mu]m<-1>, and a spatial frequency of 0.1 [mu]m<-1>, respectively, in a power spectrum of the height of the surface irregularities are within respective predetermined 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 In order to prevent degradation 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....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02B32B7/02G02F1/1335
CPCG02B5/0294G02F1/133502
Inventor 古谷勉
Owner SUMITOMO CHEM CO LTD
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