Method for sparkle control and articles thereof

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.

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.