EP 2648486 A1 20131009 - Led illumination method and apparatus
Title (en)
Led illumination method and apparatus
Title (de)
LED-Beleuchtungsverfahren und Vorrichtung
Title (fr)
Procédé et appareil d'éclairage à DEL
Publication
Application
Priority
GB 201206172 A 20120405
Abstract (en)
A method for driving an LED array with a plurality of section is disclosed, in which each section of the LED array comprises at least one LED device, wherein each section is supplied with power using pulse width modulation with a common frequency, wherein the power supplied to each section is phased relative to the other sections to reduce the maximum total power supplied to all sections, relative to supplying all sections with a common phase. An illuminator is disclosed comprising an LED array and a drive circuit, wherein the LED array comprises a plurality of sections, each section comprising at least one LED device, and the drive circuit is arranged to supplied each section with power using pulse width modulation with a common frequency, with the power supplied to each section being phased relative to the other sections to thereby reduce the maximum total power supplied to all sections, relative to supplying all sections with a common phase.
IPC 8 full level
H05B 33/08 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP GB US)
H05B 45/325 (2020.01 - EP GB US); H05B 47/155 (2020.01 - GB); H05B 45/10 (2020.01 - EP GB US)
Citation (search report)
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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)
EP 2648486 A1 20131009; GB 201206172 D0 20120523; GB 2500929 A 20131009
DOCDB simple family (application)
EP 13161351 A 20130327; GB 201206172 A 20120405