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:
Mar. 31, 2015
Filed:
Apr. 26, 2012
Andre Mitterbacher, Dornbirn, AT;
Andre Mitterbacher, Dornbirn, AT;
Tridonic GmbH & Co KG, Dornbirn, AT;
Abstract
For the purpose of power factor correction of an operating device for a lamp, an inductor () is supplied with an input voltage (Vin), a controllable switch element () coupled with the inductor () being opened or closed to optionally charge or discharge the inductor (). A control unit () for controlling the switch element () is designed such that it determines, depending on an output voltage (Vout) of the power factor correction circuit, a switch-on time (Ton) for switching the switch element () on and controls the switch element () optionally according to at least a first operating mode and a second operating mode, the operation in the first operating mode and the operation in the second operating mode being dependent on the duration of the determined switch-on time (Ton).