Transparent substrate

A technology of transparent substrate and transmitted light, applied in optics, instruments, optical components, etc., can solve problems such as difficult to observe images, unpleasantness, etc., and achieve the effect of suppressing glare

Inactive Publication Date: 2020-02-04
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If such a reflection occurs on the display screen, it will be difficult for the viewer of the display screen to observe the displayed image, or feel an unpleasant impression.

Method used

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Examples

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Effect test

example 1

[0122] A transparent substrate with antiglare function was prepared by the following method.

[0123] First, a glass substrate with a thickness of 0.56 mm is prepared. The glass substrate is made of aluminosilicate glass and is not chemically strengthened.

[0124] Next, wet etching is performed on the glass substrate. Wet etching is performed by bringing an etchant into contact with only one surface (first surface) of the glass substrate. The etching solution is a mixed solution of hydrofluoric acid, sulfuric acid and ammonium fluoride. The etching depth was 5 μm (target value).

[0125] Thus, a transparent substrate having an antiglare function (hereinafter referred to as "sample 1") was obtained.

example 2

[0127] Using the following method, a transparent substrate with anti-glare function was prepared.

[0128] First, a glass substrate with a thickness of 0.71 mm is prepared. The glass substrate is made of aluminosilicate glass and is not chemically strengthened.

[0129] Next, sandblasting is given to one surface (1st surface) of this glass substrate. White alumina particles (#2000) were used as abrasive grains, and the pressure was 0.5 MPa.

[0130] Next, selective wet etching is performed on the first surface of the glass substrate. The etchant is a hydrofluoric acid solution. The etching depth was 32 μm (target value).

[0131] Thus, a transparent substrate having an antiglare function (hereinafter referred to as "sample 2") was obtained.

example 3

[0133] Using the same method as Example 2, a transparent substrate with anti-glare function was made. However, in Example 3, white alumina particles (#3000) were used as abrasive grains, and blasting was performed. In addition, the etching depth was 24 μm (target value). Other conditions are the same as in Example 2.

[0134] Thus, a transparent substrate having an antiglare function (hereinafter referred to as "sample 3") was obtained.

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Abstract

A transparent substrate having anti-glare function, wherein the transparent substrate has first and second surfaces, and the transparent substrate satisfies the conditions T >= 0.25, R >= 0.8, and 0.75 <= S <= 0.95, where T is a resolution index value measured by the method described below, R is a reflection image diffusion index value, and S is a glare index value.

Description

technical field [0001] The invention relates to a transparent substrate, in particular to a transparent substrate with antiglare function. Background technique [0002] When viewing a display screen on a display device such as a smartphone or a personal computer, reflections of surrounding images often occur. If such a reflection occurs on the display screen, the viewer of the display screen will find it difficult to observe the displayed image, or give an unpleasant impression. [0003] Therefore, in order to reduce such reflections, a transparent substrate having an anti-glare function is often provided on the display screen. Contents of the invention [0004] However, when a displayed image is observed through a transparent substrate having an anti-glare function, the image may not be clear or the display screen may be dazzled (flickering is felt). [0005] In particular, recently, the resolution of images displayed on a screen has been increased in display devices, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02C03C15/00C03C19/00
CPCC03C15/00G02B5/0294C03C19/00G02B1/11G02B5/02
Inventor 山本文小林裕介西条佳孝
Owner ASAHI GLASS CO LTD
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