EP 2798913 A1 20141105 - OVER-VOLTAGE HANDLING OF LIGHTING DEVICE
Title (en)
OVER-VOLTAGE HANDLING OF LIGHTING DEVICE
Title (de)
ÜBERSPANNUNGSVERWALTUNG FÜR EINE BELEUCHTUNGSVORRICHTUNG
Title (fr)
GESTION DE SURTENSION D'UN DISPOSITIF D'ÉCLAIRAGE
Publication
Application
Priority
- US 201161581781 P 20111230
- US 201213565220 A 20120802
- US 2012058253 W 20121001
Abstract (en)
[origin: WO2013101320A1] The present disclosure relates to a lighting device that employs at least one string of LEDs as a lighting source. The string of LEDs is coupled in series with a first semiconductor switch, wherein the string of LEDs and the first semiconductor switch are coupled between a power supply node and ground. During a period when the lighting device is powering up after being initially provided power by a power supply, the system controller is configured to monitor a drive current through the first string of LEDs and modulate a control signal provided to the first semiconductor switch based on the drive current to prevent the drive current from exceeding a maximum allowable drive current value for the first string of LEDs.
IPC 8 full level
H05B 33/08 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/395 (2020.01 - EP US); H05B 45/56 (2020.01 - EP); Y02B 20/30 (2013.01 - EP)
Citation (search report)
See references of WO 2013101320A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DOCDB simple family (application)
US 2012058253 W 20121001; EP 12784104 A 20121001