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. 05, 2011
Filed:
Aug. 29, 2007
Christoph Loef, Aachen, DE;
Matthias Wendt, Wuerselen, DE;
Christoph Loef, Aachen, DE;
Matthias Wendt, Wuerselen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The present invention relates to a power supply device for supplying power to a load, preferably a LED, comprising a first circuitry () with an inverter unit () adapted to provide an AC voltage, preferably a rectangular voltage, and a resonant circuit () with a capacitance () and an inductance (), a second circuitry () with a rectifier unit (), a switch () and said load (), said switch being adapted to switch said load on and off, a controller unit () adapted to control said switch () as to adjust the power provided to said load () without any measurement signal from said primary circuitry (), and a transformer () with a primary side () and a secondary side (), said primary side being connected to said first circuitry () and said secondary side () being connected to said second circuitry (), preferably said rectifier, so that said first and second circuitries are galvanically isolated.