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. 05, 2008
Filed:
Jun. 16, 2003
Holger Mönch, Vaals, NL;
Xaver Riederer, Aachen, DE;
Carsten Deppe, Aachen, DE;
Peter Lürkens, Aachen, DE;
Holger Mönch, Vaals, NL;
Xaver Riederer, Aachen, DE;
Carsten Deppe, Aachen, DE;
Peter Lürkens, Aachen, DE;
Koninklijke Philips Electronics, N.V., Eindhoven, NL;
Abstract
The invention relates to a method for operating a discharge lampincluding two electrodesThe method comprises applying to the electrodes an alternating current I. In order to improve the performance of the lamp and to increase the life time of the lamp, it is proposed that the alternating current has a direct current component DC for compensating a temperature difference between the two electrodes. The direct current component is selected more specifically such that a first electrode, which is expected to have a lower temperature than the second electrode, functions as anode for the direct current component, while the second electrode functions as cathode for the direct current component. The invention relates equally to an electronic circuit and to a software program for operating a discharge lamp correspondingly, as well as to a lighting system comprising a discharge lamp and means for operating this discharge lamp correspondingly.