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:
May. 11, 2010
Filed:
Aug. 04, 2005
Pavel Pekarski, Eindhoven, DE;
Johan Wijntjens, Waarle, NL;
Holger Moench, Vaals, NL;
Jens Pollmann-retsch, Aachen, DE;
Pavel Pekarski, Eindhoven, DE;
Johan Wijntjens, Waarle, NL;
Holger Moench, Vaals, NL;
Jens Pollmann-Retsch, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A method and a circuit arrangement operate a discharge lamp, such as a high-intensity discharge lamp (HID) or ultra high performance lamps (UHP). The discharge lamp has first and second operating phases with a higher first or a lower second frequency of the lamp's alternating current (AC). The operating phases are activated alternatively at defined intervals and for defined periods of time, in order to achieve a stable arc discharge and only a low burnout or rise in burning voltage of the lamp during its life by configuring certain forms of electrode tips.