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:
Nov. 20, 2018
Filed:
Mar. 15, 2013
Philips Lighting Holding B.v., Eindhoven, NL;
Paul Theodorus Jacobus Boonen, Tegelen, NL;
Dmytro Viktorovych Malyna, Eindhoven, NL;
Ralph Kurt, Eindhoven, NL;
Harald Josef Günther Radermacher, Aachen, DE;
Bertrand Johan Edward Hontele, Breda, NL;
PHILIPS LIGHTING HOLDING B.V., Eindhoven, NL;
Abstract
A circuit arrangement (), a detection circuit () and an LED driver circuit () is disclosed for operating at least one lighting unit, such as an LED unit, with a phase-cut operating voltage. The circuit arrangement () comprising at least an input () for receiving a phase-cut operating voltage from said power supply and/or an output () for connection to said at least one lighting unit and a pulse injection circuit, configured to determine a phase-cut operation of said power supply and to draw a current pulse from said power supply within a delay time between 200-700 μs after said phase-cut operation to provide a stable operation of said LED unit with the phase-cut power supply. The detection circuit () comprises at least an input () for receiving a phase-cut operating voltage from said power supply and a lamp compatibility detector (), configured to determine the presence of a parallel lamp (), connected in parallel with the detection circuit () to said phase-cut power supply during operation and to provide a compatibility signal to a LED driver circuit () corresponding to the determination of said parallel lamp (), so that said driver circuit () is set between a normal operating mode and a compatibility mode in dependence of the presence of said parallel lamp ().