EP 2110005 A2 20091021 - METHOD AND DEVICE FOR DRIVING A GAS DISCHARGE LAMP
Title (en)
METHOD AND DEVICE FOR DRIVING A GAS DISCHARGE LAMP
Title (de)
VERFAHREN UND VORRICHTUNG ZUR ANSTEUERUNG EINER GASENTLADUNGSLAMPE
Title (fr)
PROCÉDÉ ET DISPOSITIF DE COMMANDE D'UNE LAMPE À DÉCHARGE DE GAZ
Publication
Application
Priority
- IB 2007054930 W 20071205
- EP 06125865 A 20061212
- EP 07849341 A 20071205
Abstract (en)
[origin: WO2008072136A2] A lamp driver (1) for driving a gas discharge lamp (2) comprises: - a lamp current-generating section (10) for generating a constant lamp current commutating at a commutation frequency, the lamp current-generating section (10) having output terminals (13, 14); - a high-frequency section (20) comprising a waveform generator (21) for generat ing an alternating current component; - a coupling device (40) for adding the alternating current component generated by the high-frequency section (20) to the commutating lamp current generated by the lamp current-generating section. In an ignition mode, the high-frequency sect ion is used to generate ignit io n pulses at an ignition frequency which is higher than the commutation frequency. In an arc-straightening mode, the high-frequency section is used to generate a current ripple at a ripple frequency which is higher than the commutation frequency and differs from the ignition frequency, the ripple having an amplitude which is lower than the amplitude of the ignition pulses.
IPC 8 full level
H05B 41/292 (2006.01); H05B 41/288 (2006.01)
CPC (source: EP)
H05B 41/2881 (2013.01); H05B 41/2928 (2013.01); Y02B 20/00 (2013.01)
Citation (search report)
See references of WO 2008072136A2
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 2008072136 A2 20080619; WO 2008072136 A3 20090312; CN 101558692 A 20091014; EP 2110005 A2 20091021; JP 2010512634 A 20100422
DOCDB simple family (application)
IB 2007054930 W 20071205; CN 200780046169 A 20071205; EP 07849341 A 20071205; JP 2009540907 A 20071205