EP 2422583 A1 20120229 - DRIVER FOR AN LED LAMP
Title (en)
DRIVER FOR AN LED LAMP
Title (de)
TREIBER FÜR EINE LED-LAMPE
Title (fr)
DISPOSITIF DE PILOTAGE POUR UNE LAMPE À DIODE ÉLECTROLUMINESCENTE (DEL)
Publication
Application
Priority
- IB 2010051662 W 20100416
- EP 09158610 A 20090423
- EP 10717797 A 20100416
Abstract (en)
[origin: WO2010122463A1] An illumination device (100), comprises: a current source (1) having output lines (5; 6); a main string (101) of LEDs (LED1,i) arranged in series between the current source output lines; at least one secondary string (102) of LEDs (LED2,i) arranged in series between the current source output lines; and a controllable current limiter (120) arranged in series with the LEDs (LED2,i) of the secondary string (102). In a preferred embodiment, the controllable current limiter comprises: - a transistor (T2) having its collector-emitter path in series with the LEDs (LED2,i) of the secondary string (102); a current sense resistor (R2x) arranged in series with said collector-emitter path; an opamp (121) having an output connected to the transistor's base, having its inverting input connected to said current sense resistor (R2x), and having its non-inverting input connected to a reference voltage level.
IPC 8 full level
H05B 44/00 (2022.01)
CPC (source: EP KR US)
H05B 45/12 (2020.01 - EP); H05B 45/14 (2020.01 - EP US); H05B 45/18 (2020.01 - EP); H05B 45/24 (2020.01 - EP); H05B 45/395 (2020.01 - EP US); H05B 45/46 (2020.01 - EP); Y02B 20/30 (2013.01 - EP KR)
Citation (search report)
See references of WO 2010122463A1
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 MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
WO 2010122463 A1 20101028; CA 2759448 A1 20101028; CN 102415213 A 20120411; EP 2422583 A1 20120229; JP 2012524961 A 20121018; KR 20120018773 A 20120305; RU 2011147477 A 20130527
DOCDB simple family (application)
IB 2010051662 W 20100416; CA 2759448 A 20100416; CN 201080018026 A 20100416; EP 10717797 A 20100416; JP 2012506616 A 20100416; KR 20117027915 A 20100416; RU 2011147477 A 20100416