EP 0871348 B1 20000607 - Ballast for independent parallel of low pressure gas discharge lamps
Title (en)
Ballast for independent parallel of low pressure gas discharge lamps
Title (de)
Vorschaltgerät für unabhängigen Parallelbetrieb von Niederdruck-Gasentladungslampen
Title (fr)
Ballast pour l'opération parallèle indépendante de lampes luminescentes à gaz de basse pression
Publication
Application
Priority
DE 19715342 A 19970412
Abstract (en)
[origin: EP0871348A1] The electronic bias device (1) is used for parallel operation of at least two gas discharge lamps (2a,2b), supplied from a DC source via a half bridge voltage converter (6), with a control stage (11) for operation of the voltage converter when the supply voltage is above a threshold value. A controlled switch (32) is controlled by a monitoring stage (27) for detecting failure of one of the gas discharge lamps for reducing the supply voltage (Vcc) to below the threshold value required by the control stage, a second controlled switch (34) operated when replacement of the lamp is detected.
IPC 1-7
IPC 8 full level
H05B 41/00 (2006.01); H05B 41/285 (2006.01)
CPC (source: EP US)
H05B 41/2855 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE
DOCDB simple family (publication)
EP 0871348 A1 19981014; EP 0871348 B1 20000607; AT E193798 T1 20000615; DE 19715342 C1 19981217; DE 59800169 D1 20000713; DK 0871348 T3 20000828; ES 2147037 T3 20000816; GR 3033853 T3 20001031; PT 871348 E 20001130; US 6011358 A 20000104
DOCDB simple family (application)
EP 98106203 A 19980404; AT 98106203 T 19980404; DE 19715342 A 19970412; DE 59800169 T 19980404; DK 98106203 T 19980404; ES 98106203 T 19980404; GR 20000401555 T 20000630; PT 98106203 T 19980404; US 5599598 A 19980407