Title:
ＬＥＤドライバ回路、照明装置、及び駆動方法
Document Type and Number:
Japanese Patent JP6746604
Kind Code:
B2
Abstract:
A first LED driver circuit comprising: a first input interface (30) 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 (32) powered by the first output; a first shorting element (36) for shorting the first output; a first control arrangement (38) for controlling the first shorting element wherein the first control arrangement (38) is adapted to close the first shorting element (36) during only one subset of half cycles of the AC power input to short circuit the first LED driver (32) and to prevent the first LED driver (32) 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 (32) and, open the first shorting element (36) during the other subset of half cycles to allow the AC power input to power the first LED driver (32), when the second LED driver circuit is not powered by the AC power input complementarily with respect to the first LED driver (32); 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.
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Inventors:
Fujie
Shillyan
Sun Xiao
Jean Jimmy
Shillyan
Sun Xiao
Jean Jimmy
Application Number:
JP2017550236A
Publication Date:
August 26, 2020
Filing Date:
March 15, 2016
Export Citation:
Assignee:
SIGNIFY HOLDING B.V.
International Classes:
H05B44/00; H02M7/06; H02M7/12
Domestic Patent References:
| JP2014073019A | ||||
| JP2013239457A |
Foreign References:
| US20140167728 | ||||
| WO2014009836A2 | ||||
| US20110057568 |
Attorney, Agent or Firm:
Sakiko Shibata