EP 3017660 A1 20160511 - A method of operating a LED based light source and a lighting device comprising such a LED based light source
Title (en)
A method of operating a LED based light source and a lighting device comprising such a LED based light source
Title (de)
VERFAHREN ZUM BETRIEB EINER LICHTQUELLE AUF LED-BASIS UND BELEUCHTUNGSVORRICHTUNG MIT SOLCH EINER LICHTQUELLE AUF LED-BASIS
Title (fr)
PROCÉDÉ DE FONCTIONNEMENT D'UNE SOURCE DE LUMIÈRE À DEL ET DISPOSITIF D'ÉCLAIRAGE COMPRENANT LADITE SOURCE DE LUMIÈRE À DEL
Publication
Application
Priority
- EP 13003318 A 20130630
- EP 2014063839 W 20140630
- EP 14745091 A 20140630
Abstract (en)
[origin: WO2015000837A1] The invention relates to a method of operating a light source comprising one or more LEDs by supplying power to the light source whenever illumination is required. A condition of the LEDs is monitored and an amount of power supplied to the light source is controlled on the basis of the monitored condition. The monitored condition may be a light emitting efficiency of the LEDs, and the amount of power supplied to the light source may be controlled such as to maintain a total amount of light output by the light source at a constant level for a predetermined period of time. The light emitting efficiency may decreases with increasing age of the LEDs and the amount of power supplied to the light source may be increased over time to compensate for the decreasing efficiency. The invention further relates to a lighting device with which the above method may be carried out. Such a lighting device may comprise a light source including one or more LEDs, a power supply and a controller. The controller may be adapted to monitor a condition of the LEDs and to control the power supply on the basis of the monitored condition.
IPC 8 full level
H05B 33/08 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/10 (2020.01 - EP US); H05B 45/58 (2020.01 - EP US); H05B 45/18 (2020.01 - EP US)
Citation (search report)
See references of WO 2015000837A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2014063839 W 20140630; EP 14745091 A 20140630