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:
Jul. 08, 2008
Filed:
Mar. 24, 2005
Lukas Leyten, Pila, PL;
Christofher Daniel Charles Hooijer, Eindhoven, NL;
Roy Hendrik Anna Maria Van Zundert, Eindhoven, NL;
Gerlach Corne Pieter Maria Emmen, Eindhoven, NL;
Lukas Leyten, Pila, PL;
Christofher Daniel Charles Hooijer, Eindhoven, NL;
Roy Hendrik Anna Maria Van Zundert, Eindhoven, NL;
Gerlach Corne Pieter Maria Emmen, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A driver for HID lamps includes four switches and generates a constant DC-current that is commutated at a low frequency. The driver includes a filter capacitor. The occurrence of peak currents due to the charging or discharging of the filter capacitor is prevented by driving one of the switches at a high frequency immediately after commutation.