EP 2945466 A3 20160720 - LIGHT-EMITTING DIODE LIGHTING DEVICE HAVING MULTIPLE DRIVING STAGES
Title (en)
LIGHT-EMITTING DIODE LIGHTING DEVICE HAVING MULTIPLE DRIVING STAGES
Title (de)
LEUCHTDIODENBELEUCHTUNGSVORRICHTUNG MIT MEHREREN ANSTEUERUNGSSTUFEN
Title (fr)
DISPOSITIF D'ÉCLAIRAGE À DIODE ÉLECTROLUMINESCENTE AYANT DE MULTIPLES ÉTAGES D'ENTRAÎNEMENT
Publication
Application
Priority
US 201414277029 A 20140513
Abstract (en)
[origin: EP2945466A2] An LED lighting device includes a slave driving stage and a master driving stage. The slave driving stage includes a first luminescent device and a first current controller for providing a constant current setting in an ON phase. The master driving stage includes a second luminescent device and a current control unit having a second current controller and a current envelope controller. The second current controller provides a current envelope in the ON phase. The current envelope controller sets a level of the current envelope according to a rectified AC voltage. The driving current is regulated by the first current controller according to the constant current setting when the constant current setting is smaller than the level of the current envelope, or by the second current controller according to the current envelope when the level of the current envelope is smaller than the constant current setting.
IPC 8 full level
H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/10 (2020.01 - EP US); H05B 45/48 (2020.01 - EP US)
Citation (search report)
- [XYI] US 2013127354 A1 20130523 - CHIANG YUNG-HSIN [TW], et al
- [Y] US 2011194311 A1 20110811 - GAKNOKI YURY [US], et al
- [Y] WO 2013100736 A1 20130704 - SEOUL SEMICONDUCTOR CO LTD [KR]
- [A] US 2013257298 A1 20131003 - CHEON JEONG IN [KR], et al
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 15167698 A 20150513