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. 21, 2019
Filed:
Mar. 15, 2016
Signify Holding B.v., Eindhoven, NL;
Jie Fu, Eindhoven, NL;
Liang Shi, Eindhoven, NL;
Xiao Sun, Eindhoven, NL;
Jimmy Jiang, Eindhoven, NL;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
A first LED driver circuit comprising: a first input interface () for receiving an AC power input and providing a first output, wherein said first output is adapted to be connected to a second LED driver circuit; a first LED driver () powered by the first output; a first shorting element () for shorting the first output; a first control arrangement () for controlling the first shorting element wherein the first control arrangement () is adapted to close the first shorting element () during only one subset of half cycles of the AC power input to short circuit the first LED driver () and to prevent the first LED driver () from being powered by the AC power input, when the second LED driver circuit is powered by the AC power input complementarily with respect to the unpowered first LED driver () and, open the first shorting element () during the other subset of half cycles to allow the AC power input to power the first LED driver (), when the second LED driver circuit is not powered by the AC power input complementarily with respect to the first LED driver (); wherein the half cycle is the positive amplitude duration or the negative amplitude duration of the AC power input This means two of the LED driver circuits may be used in series, each one is supplies by power or not complementarily based on only one subset of half cycles of the AC power input.