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:
May. 01, 2018
Filed:
Jul. 27, 2015
Philips Lighting Holding B.v., Eindhoven, NL;
Reinhold Elferich, Eindhoven, NL;
David Llewellyn John, Eindhoven, NL;
PHILIPS LIGHTING HOLDING B.V., Eindhoven, NL;
Abstract
A driver device () for driving a load (), in particular for driving an LED unit comprising one or more LEDs is presented. The driver device comprises input terminals () for connecting the driver device to an electrical power supply () for receiving a variable input voltage (V) from the electrical power supply, a converter unit () for converting the input voltage (V) to an output voltage (V) including a resonant converter () and a switch unit (), wherein the switch unit is adapted to provide a chopped voltage of the input voltage as a drive voltage (V) to the resonant converter, and a control unit () connected to the switch unit for controlling a pulse frequency (f) of the chopped voltage, wherein the control unit is adapted to control an input current (I) drawn from the electrical power supply by controlling the pulse frequency of the chopped voltage on the basis of a measured value of the variable input voltage.