Method for sparkle control and articles thereof

Patent metadata

Field	Value
Publication number	US-2016355689-A1
Application number	US-201615243144-A
Country	US
Kind code	A1
Filing date	Aug 22, 2016
Priority date	Nov 2, 2011
Publication date	Dec 8, 2016
Grant date	—

Abstract

A glass article including: at least one anti-glare surface having haze, distinctness-of-image, surface roughness, uniformity properties and sparkle properties, as defined herein. A method of making the glass article includes, for example, slot coating a suspension of particles on at least one surface of the article to provide a particulated mask covering from about 40 to 92% of the coated surface area; contacting the at least one surface of the article having the particulated mask and an etchant to form the anti-glare surface, and optionally continuously polishing the suspension of particles just prior to slot coating. A display system that incorporates the glass article, as defined herein, is also disclosed.

First claim

1 .- 13 . (canceled)

14 . A glass article prepared by the method comprising:
slot coating a suspension of particles on at least one surface of the article to provide a particulated mask covering from about 40 to 92% of the coated surface area; and contacting the at least one surface of the article having the particulated mask and an etchant to form the anti-glare surface comprising: at least one anti-glare surface having:
a haze of from about 0.1 to about 30;
a distinctness-of-image (DOI 20°) of from about 25 to about 85;
a surface roughness (Ra) of from about 50 to about 500 nm;
low sparkle of from about 1 to about less than or equal to 7 as measured by PPD at 0° and 90°; and
an average roughness peak-to-valley difference profile of from about 0.1 to about 10 micrometers.

15 . The glass article of claim 14 wherein the anti-glare surface comprises a distribution of topographic features having an average diameter of about 1 to about 100 micrometers.

16 . The glass article of claim 14 wherein the article is a protective cover glass for a display device.

17 . The glass article of claim 14 wherein the haze is from about 0.1 to about 30.

18 . The glass article of claim 14 wherein the haze is from about 0.1 to about 5.

19 . A slot coater comprising:
a slot die; a source of a particle suspension; and a polisher situated between the source of the particle suspension and the slot die, wherein the polisher continuously polishes the particle suspension during slot coating.

Assignees

• Corning Inc

Inventors

• Lander Charles Warren
• Nguyen Kelvin
• Stephens Ii Alan Thomas

Classifications

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• G02B5/0226

  having particles on the surface · CPC title

• C03C2218/34

  Masking · CPC title

• G02B5/0268

  characterized by the fabrication or manufacturing method · CPC title

• C09D133/12

  Homopolymers or copolymers of methyl methacrylate · CPC title