Title:
ＬＥＤ照明システム
Document Type and Number:
Japanese Patent JP5770393
Kind Code:
B2
Abstract:
The invention relates to a LED lighting system comprising a power supply circuit for supplying a LED current, equipped with input terminals (K1, K2) for connection to a supply voltage source and output terminals (K3, K4), modulation circuitry (MS, DC2), coupled between the output terminals, for alternately maintaining the voltage between the output terminals at a high level during a first time interval and a low level during a second time interval, a current sensor (R1, R2, S1) for sensing the current through the output terminals during the second time interval, and a driver circuit (DC1, DC2), coupled between the input terminals and the output terminals and coupled to the current sensor, for generating the LED current, out of a supply voltage supplied by the supply voltage source, wherein the LED current equals the current sensed by the current sensor multiplied by a predetermined constant multiplication factor and for supplying the LED current to the output terminals during each first time interval. The LED lighting system further comprises a LED module comprising LED module input terminals (K5, K6) for connection to the output terminals of the power supply circuit, a LED load (LS) coupled between the LED module input terminals with a forward voltage that is higher than the voltage that is present between the output terminals of the power supply circuit during each second time interval, and a current source (CS) coupled between the input terminals for, in case the LED module input terminals are connected to the output terminals of a power supply source, during each second time interval generating a sensor current through the current sensor that is equal to a desired LED current divided by the predetermined constant multiplication factor.
Inventors:
Van der veen hierth willem
Cornelissen Wilhelms Josephs
Juan Bodeflafen Taymen Cornelis
De Brueckel Patrick Araiusius Martina
Cornelissen Wilhelms Josephs
Juan Bodeflafen Taymen Cornelis
De Brueckel Patrick Araiusius Martina
Application Number:
JP2014557164A
Publication Date:
August 26, 2015
Filing Date:
March 07, 2013
Export Citation:
Assignee:
KONINKLIJKE PHILIPS N.V.
International Classes:
H05B37/02; H05B44/00
Domestic Patent References:
| JP2005093196A | ||||
| JP2007042533A | ||||
| JP2006351484A |
Foreign References:
| US20040056774 |
Attorney, Agent or Firm:
Susumu Tsugaru
Fueda Shusen
Keiichi Asamura
Fueda Shusen
Keiichi Asamura