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. 21, 2015
Filed:
Jun. 08, 2009
Georg Sauerlaender, Aachen, DE;
Georg Sauerlaender, Aachen, DE;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
The present invention relates to a harmonic compensation circuit for compensating at least the third harmonic in the input current (I) drawn by an LED light source () from a mains voltage supply (), comprising: a signal input () for receiving a first input signal proportional to the input voltage (V) of said LED light source () and a second input signal (V) proportional to the LED current (I) of said LED light source (), a signal output () for outputting a compensation current (Icomp), a processing unit () for comparing said second input signal (V) to a reference signal (V, V) and for generating said compensation current (I) based on said comparison, the sum of said compensation current (I) and said LED current (I) being proportional to the input voltage (V) of said LED light source () and said compensation current (I) being provided for minimizing at least the third harmonic in the input current (I) drawn by said LED light source () from said mains voltage supply ().