EP 2208401 B1 20110316 - ELECTRONIC BALLAST AND METHOD FOR OPERATING AT LEAST ONE FIRST AND SECOND DISCHARGE LAMP
Title (en)
ELECTRONIC BALLAST AND METHOD FOR OPERATING AT LEAST ONE FIRST AND SECOND DISCHARGE LAMP
Title (de)
ELEKTRONISCHES VORSCHALTGERÄT UND VERFAHREN ZUM BETREIBEN MINDESTENS EINER ERSTEN UND EINER ZWEITEN ENTLADUNGSLAMPE
Title (fr)
BALLAST ÉLECTRONIQUE ET PROCÉDÉ POUR FAIRE FONCTIONNER AU MOINS UNE PREMIÈRE ET UNE DEUXIÈME LAMPES À DÉCHARGE
Publication
Application
Priority
EP 2007062117 W 20071109
Abstract (en)
[origin: WO2009059643A1] The invention relates to an electronic ballast for operating at least one first and second discharge lamp, comprising a bridge circuit and inductors connected in series to the respective discharge lamp, a current measuring device (R3), which measures the total current through the first and second inductors, and an actuation circuit for actuating the bridge circuit, a threshold value specification device for specifying a first threshold value for the target value of the total current through the first and second inductors, wherein the electronic ballast furthermore comprises: a starting detection device (20) for detecting whether one of the discharge lamps has started, the threshold value specification device being configured to specify a second threshold value for the target value of the total current through the first and second inductors, the second threshold value being smaller than the first threshold value, and the actuation device being configured to control the bridge circuit while taking the first threshold value into consideration as the target value prior to detecting the starting of a discharge lamp, and while taking the second threshold value into consideration as the target value after detecting the starting of a discharge lamp.
IPC 8 full level
H05B 41/285 (2006.01); H05B 41/38 (2006.01)
CPC (source: EP US)
H05B 41/2856 (2013.01 - EP US); H05B 41/382 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2009059643 A1 20090514; AT E502511 T1 20110415; CN 101855944 A 20101006; CN 101855944 B 20130522; DE 502007006751 D1 20110428; EP 2208401 A1 20100721; EP 2208401 B1 20110316; JP 2011503791 A 20110127; JP 4988931 B2 20120801; KR 101339031 B1 20131209; KR 20100098625 A 20100908; US 2010237791 A1 20100923; US 8441200 B2 20130514
DOCDB simple family (application)
EP 2007062117 W 20071109; AT 07822414 T 20071109; CN 200780101472 A 20071109; DE 502007006751 T 20071109; EP 07822414 A 20071109; JP 2010532445 A 20071109; KR 20107012705 A 20071109; US 74183310 A 20100507