EP 1118251 B1 20060621 - CONTROL CIRCUIT FOR LED AND CORRESPONDING OPERATING METHOD
Title (en)
CONTROL CIRCUIT FOR LED AND CORRESPONDING OPERATING METHOD
Title (de)
ANSTEUERSCHALTUNG FÜR LED UND ZUGEHÖRIGES BETRIEBSVERFAHREN
Title (fr)
CIRCUIT DE COMMANDE DE DEL ET PROCEDE D'UTILISATION DUDIT CIRCUIT
Publication
Application
Priority
- DE 0000989 W 20000401
- DE 19930174 A 19990630
Abstract (en)
[origin: US6400101B1] The drive circuit is suitable for an LED array, comprising a number of clusters of LEDs, with one cluster comprising a number of LEDs which are arranged in series and are connected to a supply voltage (UBatt). A semiconductor switch (transistor T) is arranged in series between the LED and the supply voltage and allows the LED current to be supplied in a pulsed manner. A measurement resistor (Rshunt) for measuring the LED current is arranged in series between the LED and ground, with a control loop controlling the semiconductor switch such that a constant mean value of the LED current is achieved.
IPC 8 full level
H05B 37/02 (2006.01); G09G 3/14 (2006.01); H01L 33/00 (2010.01); H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/14 (2020.01 - EP US); H05B 45/18 (2020.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 6400101 B1 20020604; AT E331422 T1 20060715; CA 2341657 A1 20010111; DE 19930174 A1 20010104; DE 50013044 D1 20060803; EP 1118251 A1 20010725; EP 1118251 B1 20060621; JP 2003504797 A 20030204; WO 0103474 A1 20010111
DOCDB simple family (application)
US 76268501 A 20010212; AT 00926699 T 20000401; CA 2341657 A 20000401; DE 0000989 W 20000401; DE 19930174 A 19990630; DE 50013044 T 20000401; EP 00926699 A 20000401; JP 2001508200 A 20000401