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:
Sep. 13, 2016
Filed:
Dec. 20, 2012
Tridonic Gmbh & CO KG, Dornbirn, AT;
Andre Mitterbacher, Dornbirn, AT;
TRIDONIC GMBH & CO KG, Dornbirn, AT;
Abstract
An operating circuit for light-emitting means (), in particular an LED string, contains an actively clocked power factor correction circuit (), which produces a regulated output voltage (U), by means of which the light-emitting means () are supplied directly or indirectly via at least one further converter stage (). The regulation is performed by means of a control unit (), which, as manipulated variable (t), actuates clocking of a switch of the power factor correction circuit (). The operating circuit is designed, in the event of the presence of a predefined event, for example a rapid or sudden change in the energy demand of the light-emitting means (), selectively: —to change suddenly the value of the manipulated variable (t) using feedforward control, and/or —to vary the time constant of the control loop of the output voltage (U).