EP 2862416 A1 20150422 - METHOD AND ARRANGEMENT FOR OPERATING A LIGHTING DIODE
Title (en)
METHOD AND ARRANGEMENT FOR OPERATING A LIGHTING DIODE
Title (de)
VERFAHREN UND ANORDNUNG ZUM BETREIBEN EINER LEUCHTDIODE
Title (fr)
PROCÉDÉ ET ENSEMBLE POUR FAIRE FONCTIONNER UNE DIODE ÉLECTROLUMINESCENTE
Publication
Application
Priority
EP 2012066323 W 20120822
Abstract (en)
[origin: WO2014029427A1] The invention relates to a method for operating at least one lighting diode (D) dependent on the ambient light. In the method, a lighting diode (D) is actuated such that the lighting diode (D) lights up during a first time interval (Z1) and does not light up during a subsequent second time interval (Z2). During the first time interval (Z1), a capacitor (C) is charged. During the second time interval (Z2), the capacitor (C) is discharged via the lighting diode (D), said lighting diode (D) being exposed to the ambient light. During the second time interval (Z2), the capacitor voltage (U2) is measured, and the ratio of the duration of the first time interval (Z1) to the duration of the second time interval (Z2) varies depending on the capacitor voltage (U2).
IPC 8 full level
H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/12 (2020.01 - EP US); H05B 47/11 (2020.01 - EP); Y02B 20/40 (2013.01 - EP)
Citation (search report)
See references of WO 2014029427A1
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 2012066323 W 20120822; EP 12758788 A 20120822