Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent
1993-11-12
1995-04-04
Yusko, Donald J.
Electric lamp and discharge devices
Cathode ray tube
Envelope
313478, 348834, H01J 2988
Patent
active
054040736
ABSTRACT:
An antiglare/antistatic coating for a cathode ray tube (CRT) is applied to the outer surface of the CRT's faceplate and includes a first inner hygroscopic layer of silane, water, sulfuric acid and an alcohol mixture which may be applied by dipping, spinning or spraying. The coating further includes a second outer layer of silanes, water, acid, epoxy, and a coupling agent balanced with an alcohol mixture which is sprayed onto the first inner layer. The grounded first inner layer possesses high conductivity for antistatic protection, while the second outer layer, which possesses glass-like characteristics, provides antiglare protection by reducing the faceplate's reflectivity. The second outer layer dries as a hard porous coating which resists scratching and allows water vapor to penetrate into the first inner hygroscopic layer to maintain its high conductivity.
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Hu Chun-Min
Tong Hua-Sou
Chunghwa Picture Tubes Ltd.
Patel N. D.
Yusko Donald J.
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