The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2003
Filed:
Sep. 27, 2001
Kuo-Chu Wang, Taipei, TW;
Chun-Min Hu, Keelung, TW;
Chunghwa Picture Tubes, Ltd., Taoyuan, TW;
Abstract
A two-layer coating for the outer surface of a glass display screen of a video display device such as a cathode ray tube (CRT) includes an inner antistatic layer and an outer antireflective layer. The outer antireflective layer contains silica and has a refractive index in the range of 1.4-1.5. The inner layer contains carbon black powder particles which provide high electrical conductivity to dissipate electrostatic charge on the glass display screen. The inner layer further includes a surface activation agent, such as glycol, for dispersing the carbon black particles in the antistatic solution. To increase the refractive index of the inner layer to a value greater than its typical value, which is in the range of 1.5-2.0, for the purpose of reducing light reflection from the glass display screen while maintaining high conductivity, ZrO , ZnO, ZnS or TiO , or a combination thereof, is added to the inner antistatic layer to provide a stable solution with optically and electrically desirable characteristics.