EP 3258743 A1 20171220 - DIRECT DRIVE LED LIGHTING
Title (en)
DIRECT DRIVE LED LIGHTING
Title (de)
DIREKTANGETRIEBENE LED-BELEUCHTUNG
Title (fr)
ÉCLAIRAGE PAR DEL À ENTRAÎNEMENT DIRECT
Publication
Application
Priority
EP 16174276 A 20160613
Abstract (en)
A direct drive LED lighting circuit includes a LED current control circuit with a power switching device; a current sensing device, an averaging circuit, and an error amplifier. A LED chain circuit is formed by connecting several LEDs in series with a capacitor connecting in parallel with the series of LEDs, with a current flowing in side as a positive terminal, and a current leaving terminal as a negative terminal. The LED chain circuit and the LED current control circuit are connecting in series and the whole circuit is connected between the positive and negative terminals of a rectified AC power source.
IPC 8 full level
H05B 33/08 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP)
H05B 45/44 (2020.01)
Citation (search report)
- [Y] US 2013187550 A1 20130725 - LO YUAN-HUNG [TW], et al
- [Y] EP 2958402 A1 20151223 - NXP BV [NL]
- [A] EP 2563094 A2 20130227 - O2MICRO INC [US]
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 16174276 A 20160613; JP 2016207151 A 20161021