EP 2229667 A1 20100922 - AN LED DRIVER METHOD FOR TRAFFIC LANTERNS
Title (en)
AN LED DRIVER METHOD FOR TRAFFIC LANTERNS
Title (de)
LED-TREIBERVERFAHREN FÜR VERKEHRSLATERNEN
Title (fr)
PROCÉDÉ DE COMMANDE DE DEL POUR LANTERNES DE CIRCULATION
Publication
Application
Priority
- AU 2008001778 W 20081203
- AU 2007906653 A 20071203
Abstract (en)
[origin: WO2009070828A1] An LED driver for a traffic lantern has a current mirror (14) adapted to control the current through an LED (18) of the lantern, and a fault detector (20) connected to an output (16) of the current mirror (14) and the LED (1 8). The fault detector (20) is adapted to indicate a fault condition if the voltage measured is outside a predetermined range. The LED driver also has a voltage sensor (26) adapted to provide an output voltage (30) proportional to the average voltage of other LED drivers for the lantern which are not connected to faulty LEDs.
IPC 8 full level
G08G 1/095 (2006.01); H05B 37/03 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/58 (2020.01 - EP US); H05B 47/24 (2020.01 - EP US)
Citation (search report)
See references of WO 2009070828A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2009070828 A1 20090611; WO 2009070828 A9 20101125; AU 2008331420 A1 20090611; AU 2008331420 B2 20131024; CN 101896951 A 20101124; EP 2229667 A1 20100922; NZ 586130 A 20131025; ZA 201004263 B 20110428
DOCDB simple family (application)
AU 2008001778 W 20081203; AU 2008331420 A 20081203; CN 200880118936 A 20081203; EP 08856603 A 20081203; NZ 58613008 A 20081203; ZA 201004263 A 20100615