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:
Mar. 30, 1993
Filed:
Sep. 30, 1991
Johannes M Van Meurs, Eindhoven, NL;
Jozef H Reinaerts, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A circuit arrangement for operating a discharge lamp having a load branch provided with lamp connection terminals and coupled to a branch of a DC-AC converter. The branch of the converter includes at least one switching element for generating and supplying a current of alternating polarity to the load branch by being alternately conductive and non-conductive at a frequency f. A drive circuit makes the switching element alternately conductive and non-conductive at the frequency f. A control circuit is coupled to the drive circuit and to the discharge lamp for generating a control signal which is dependent on the lamp current and serves to influence the frequency. The control signal is also dependent on a signal S which is a measure of comparatively rapid changes in the power consumed by the discharge lamp. The lamp power thus can be adjusted over a wide range irrespective of the type of discharge lamp used.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile