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:
Sep. 23, 2003
Filed:
May. 25, 2001
Kuo-Chu Wang, Taipei, TW;
Chun-Min Hu, Keelung, TW;
Chunghwa Picture Tubes, Ltd., Taoyuan, TW;
Abstract
For use in a color cathode ray tube (CRT) having a display screen with a flat outer surface and a curved inner surface, a 2-layer antistatic and antireflective coating for the display screen's flat outer surface compensates for the variation in screen thickness to provide uniform light transmission through the screen and coating combination, a high degree of video image contrast, effective electrostatic shielding and discharge, and reduced light reflectivity. The coating includes a first inner electrically conductive layer disposed on the CRT display screen's flat outer surface containing carbon black particles for a high level of video image contrast and improved electrical conductivity for electrostatic shielding and discharge. The extent of light transmission through the inner conductive layer may be adjusted in accordance with the display screen's thickness by varying the amount of carbon black particles in the coating solution.