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:
Nov. 06, 1984
Filed:
Sep. 21, 1981
Jan Gerritsen, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A picture display device including a picture display tube and a circuit for supplying the heater thereof with an increased heater voltage during a predetermined warming up period. The heater is connected to the secondary winding of an (auto) transformer, the primary winding of which is connected to a terminal of an a.c. voltage source, for example a winding provided on a line output transformer, the other ends of the primary and the secondary windings being interconnected and connected to a positive temperature coefficient thermistor and the other ends of the heater and the thermistor being connected to the other terminal of the source. The secondary winding has more turns than the primary winding.