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:
Oct. 06, 2015
Filed:
Dec. 20, 2012
Tridonic Gmbh & CO KG, Dornbirn, AT;
Andre Mitterbacher, Dornbirn, AT;
Markus Mayrhofer, Dornbirn, AT;
TRIDONIC GMBH & CO KG, Dornbirn, AT;
Abstract
The invention relates to an operating circuit for illuminants, in particular one or more LED sections (), comprising an actively clocked PFC circuit (), which can be supplied by an AC voltage (U) and optionally also a DC voltage (U) and the output voltage of which is directly or indirectly supplied through the illuminant () to a unit () for generating a PWM-modulated current. The operating circuit also has a control unit () that detects a residual ripple in the voltage (U) in the supply chain before (), in () or after () the PFC circuit () and causes the frequency of the PWM modulation of the current through the illuminant () to be selected as a function of the frequency of the residual ripple.