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:
Apr. 11, 2000
Filed:
Nov. 03, 1998
Applicant:
Inventors:
Johannes A Damsteegt, Eindhoven, NL;
Dirk Van Houwelingen, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
445-3 ;
Abstract
To test a cathode ray tube or an apparatus comprising a cathode ray tube, a part of the electron gun is heated by means of high-frequency electromagnetic radiation. By virtue thereof, the warm-up period, that is the time which, after turning on the cathode ray tube, must elapse before the testing operation can be carried out, can be reduced, for example, from approximately 30 minutes to approximately 2 minutes.