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Anti-glare glass sheet

A glass plate, etching technology, applied in the coating and other directions, can solve the problem of difficult to apply the coating evenly

Inactive Publication Date: 2021-03-09
AGC GLASS EUROPE SA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the inventors discovered, on acid-etched rough substrates, these coatings are often difficult to apply uniformly, especially in the case of sol-gel based coatings that also reduce surface roughness
These coatings can also produce unexpected and undesired results related to the color of reflected light

Method used

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Examples

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Embodiment Construction

[0015] The invention relates to a glass sheet comprising at least one anti-reflection etched surface having, when measured over an evaluation length of 12 mm and with a Gaussian filter with a cut-off wavelength of 0.8 mm The surface roughness of is defined by:

[0016] 0.02≤Ra≤0.6μm,

[0017] 0.1≤Rz≤3μm, and

[0018] 5≤RSm≤180μm,

[0019] wherein the antireflection etched surface comprises implanted ions O, N, He, Ne, Ar or Kr, wherein the implantation depth is comprised between 0.1 μm and 1 μm, the glass plate when measured from the antireflection etched surface Has the following optical properties:

[0020] Haze values ​​from 1% to 40%,

[0021] Transparency values ​​from 30% to 100%,

[0022] 60° gloss values ​​from 20SGU to 130SGU, and

[0023] Visible light reflectivity from 7% to 4,5%.

[0024] These properties are achieved without any coating or surface treatment on the surface opposite the anti-reflective etched surface. The etched glass sheet according to the ...

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Abstract

The invention relates to a glass sheet comprising at least one antireflective, etched surface having a surface roughness defined, when measured on an evaluation length of 12 mm and with a Gaussian filter of which the cut-off wavelength is 0.8 mm, by: 0.02 <= Ra <= 0.6 um, 0.1 <= Rz <= 3 um and 5 <= RSm <= 180 um, said glass sheet having the following optical properties, when measured from said antireflective, etched surface: a haze value of from 1 to 40%; a clarity value of from 30 to 100%; a gloss value at 60 degrees of from 20 to 130 SGU; a luminous reflectance Rc from 4 to 7%. and wherein the antireflective, etched surface comprises implanted ions. Such a glass sheet which is particularly suitable for display applications as cover glass. In particular, the glass sheet of the invention has excellent sparkle reduction properties together with an anti-glare effect. Moreover, the glass sheet of the invention also combines anti-glare and sparkle reduction properties with a "soft touch".

Description

technical field [0001] The present invention relates to a glass sheet with low reflectivity which is suitable for cover glass, and in particular for display applications as cover glass. In particular, the present invention relates to such a glass sheet having excellent low glare properties together with anti-glare effect. In addition, the glass sheet of the present invention also combines low reflectivity, anti-glare and low glare properties with a "soft touch". Background technique [0002] Glare reduction on smooth surfaces (like glass sheets, for example) is particularly useful, or even mandatory, in display applications where bright light sources are present, like outdoor applications where glare is often noticeable due to sunlight. Textured glass surfaces are widely used in the display industry to reduce glare. This texturing can be produced by several known methods like (i) removal of material from the smooth glass surface by chemical etching or sandblasting or (ii) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C23/00C03C15/00C03C17/245
CPCC03C15/00C03C17/2456C03C23/0055C03C2217/734C03C2204/08
Inventor B·纳维特A·加奎斯
Owner AGC GLASS EUROPE SA
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