EP 1915036 B1 20100224 - Pre-switching device for operating at least one low pressure discharge lamp
Title (en)
Pre-switching device for operating at least one low pressure discharge lamp
Title (de)
Vorschaltgerät zum Betrieb mindestens einer Niederdruckentladungslampe
Title (fr)
Appareil de montage destiné au fonctionnement d'au moins une lampe à décharge basse tension
Publication
Application
Priority
- EP 02011284 A 20020522
- DE 10134966 A 20010723
Abstract (en)
[origin: US2003015974A1] The invention relates to a ballast for operating at least one low-pressure discharge lamp, preferably a three- or four-lamp ballast. In order for all parallel- or series-connected low-pressure discharge lamps (L40-L43) to shine equally bright even in the case of strong dimming, the ballast according to the invention has a transformer (Tr40) for balancing the currents in the lamp branch circuits and a transformer (Tr41) for compensating the losses owing to parasitic capacitances.
IPC 8 full level
H05B 41/282 (2006.01)
CPC (source: EP US)
H05B 41/2827 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
US 2003015974 A1 20030123; US 6717371 B2 20040406; AT E413086 T1 20081115; AT E459232 T1 20100315; CA 2394409 A1 20030123; DE 10134966 A1 20030206; DE 50212951 D1 20081211; DE 50214247 D1 20100408; EP 1286572 A2 20030226; EP 1286572 A3 20050119; EP 1286572 B1 20081029; EP 1915036 A1 20080423; EP 1915036 B1 20100224
DOCDB simple family (application)
US 19536202 A 20020716; AT 02011284 T 20020522; AT 08150534 T 20020522; CA 2394409 A 20020722; DE 10134966 A 20010723; DE 50212951 T 20020522; DE 50214247 T 20020522; EP 02011284 A 20020522; EP 08150534 A 20020522