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:
Nov. 30, 2004
Filed:
Sep. 13, 2002
Applicant:
Inventors:
Reinhard Böckle, Maeder, AT;
Peter Hein, Fraxern, AT;
Assignee:
TridonicAtco GmbH & Co. KG, Dornbirn, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 ;
U.S. Cl.
CPC ...
H02M 3/335 ;
Abstract
A circuit and a method for controlling light emitting diodes (D , D ) for illumination involve an inverter whose output frequency can be varied. The inverter includes two electronic switches (S , S ) which convert an applied direct current voltage (U ) into an alternating voltage. A load circuit is connected to the output of the inverter and includes a resonance element and at least one light emitting diode (D , D ) whose brightness is controlled by altering the output frequency of the inverter.