EP 2519079 B1 20171122 - Solid light-emitting element lighting device and illumination fixture using the same
Title (en)
Solid light-emitting element lighting device and illumination fixture using the same
Title (de)
Feste LED-Beleuchtungsvorrichtung und Beleuchtungsbefestigung damit
Title (fr)
Dispositif d'éclairage à éléments électroluminescents solides et accessoire d'éclairage l'utilisant
Publication
Application
Priority
JP 2011060866 A 20110318
Abstract (en)
[origin: EP2519079A1] [Object] To provide a solid light-emitting element lighting device and an illumination fixture using the same that are able to smoothly change an optical output in sweeping of a PWM signal for dimming. [Means for Settlement] A LED lighting device includes: a series circuit of an inductor L1 and a switching element Q1 that are connected between output terminals of a direct-current power source 1 via a LED module 4; a diode D 1 for regenerating energy accumulated in the inductor L1 to the LED module 4; and a control circuit part 3 for controlling on and off of the switching element Q1. The control circuit part 3 includes a drive signal generation part 34 for generating a drive pulse whose pulse width varies in accordance with amplitude of a load current, and controls on and off of the switching element Q1 due to the drive pulse in an on-period of the PWM signal whose on-duty varies in accordance with a dimming level, the PWM signal being a lower frequency than the drive pulse. An output voltage of the direct-current power source 1 is set to be larger than the load voltage applied to the LED module 4 and to be 2.5 times as large as the load voltage or less.
IPC 8 full level
H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/37 (2020.01 - EP 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
DOCDB simple family (publication)
EP 2519079 A1 20121031; EP 2519079 B1 20171122; CN 102685977 A 20120919; CN 102685977 B 20150401; JP 2012199002 A 20121018; JP 5821023 B2 20151124
DOCDB simple family (application)
EP 12159970 A 20120316; CN 201210059376 A 20120308; JP 2011060866 A 20110318