US Patent No. 10,299,328

LED DRIVER CIRCUIT, LIGHTING ARRANGEMENT AND DRIVING METHOD


Patent No. 10,299,328
Issue Date May 21, 2019
Title Led Driver Circuit, Lighting Arrangement And Driving Method
Inventorship Jie Fu, Eindhoven (NL)
Liang Shi, Eindhoven (NL)
Xiao Sun, Eindhoven (NL)
Jimmy Jiang, Eindhoven (NL)
Assignee SIGNIFY HOLDING B.V., Eindhoven (NL)

Claim of US Patent No. 10,299,328

1. 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 serially 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 configured to:
close the first shorting element at a zero-crossing of a first subset of half cycles of the AC power input to short circuit the first LED driver and prevent the first LED driver from being powered, wherein the AC power input passes to the second LED driver during the first subset of half cycles, and
open the first shorting element at a zero-crossing of a second subset of half cycles of the AC power input to power the first LED driver, wherein said second subset of half cycles does not overlap with the first subset of half cycles;
wherein the half cycle is the positive amplitude duration or the negative amplitude duration of the AC power input.