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. 03, 2009
Filed:
Oct. 22, 2002
Wilhelmus Hinderikus Maria Langeslag, Nijmegen, NL;
Antoon Joseph Bock, Landgraaf, NL;
Peter Luerkens, Aachen, DE;
Wilhelmus Hinderikus Maria Langeslag, Nijmegen, NL;
Antoon Joseph Bock, Landgraaf, NL;
Peter Luerkens, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A ballast arrangement is provided for igniting and operating a discharge lamp. The lamp is connected in a commutating bridge in series with an inductor and parallel to a capacitor. The inductor and the capacitor together form a resonance circuit. During ignition, the bridge is commutated at a comparatively high frequency that changes with respect to time. The series resonance circuit has a resonance frequency that is close to an odd harmonic of the comparatively high frequency.