Title (en)

METHOD FOR DETECTING A LAMP CHANGE AND ELECTRONIC LAMP BALLAST FOR OPERATING GAS-DISCHARGE LAMPS USING SUCH A METHOD FOR DETECTING A LAMP CHANGE

Title (de)

LAMPENWECHSELERKENNUNGSVERFAHREN UND ELEKTRONISCHES VORSCHALTGERÄT ZUM BETREIBEN VON GASENTLADUNGSLAMPEN MIT HILFE EINES DERARTIGEN LAMPENWECHSELERKENNUNGSVERFAHRENS

Title (fr)

PROCEDE DE DETECTION DE CHANGEMENT DE LAMPE ET BALLAST ELECTRONIQUE DESTINE AU FONCTIONNEMENT DE LAMPES A DECHARGE A L'AIDE D'UN TEL PROCEDE DE DETECTION DE CHANGEMENT DE LAMPE

Publication

EP 1040732 A1 20001004 (DE)

Application

EP 98962359 A 19981119

Priority

• DE 19757668 A 19971223
• EP 9807427 W 19981119

Abstract (en)

[origin: WO9934649A1] The invention relates to a method for detecting a change of gas-discharge lamp and to an electronic lamp ballast with such a method is used. To detect a lamp change a supply voltage of a certain frequency is applied to a load circuit (E) to which at least one gas-discharge lamp (G1, G2) is connected. The transient response of the load circuit (E) is monitored which is set in line with the supply voltage of a certain frequency being applied. On the basis of the transient response it is determined whether one of the gas-discharge lamps connected to the load circuit (E) has been cut off or whether all gas-discharge lamps (G1, G2) are correctly connected to said load circuit (E).

IPC 1-7

H05B 41/29

IPC 8 full level

H05B 41/00 (2006.01); H05B 41/298 (2006.01)

CPC (source: EP)

H05B 41/2981 (2013.01)

Designated contracting state (EPC)

AT CH DE ES FI FR GB IT LI NL SE

DOCDB simple family (publication)

WO 9934649 A1 19990708; AT E205359 T1 20010915; AU 1755599 A 19990719; DE 59801412 D1 20011011; EP 1040732 A1 20001004; EP 1040732 B1 20010905; ES 2163903 T3 20020201; ZA 9811776 B 19990708

DOCDB simple family (application)

EP 9807427 W 19981119; AT 98962359 T 19981119; AU 1755599 A 19981119; DE 59801412 T 19981119; EP 98962359 A 19981119; ES 98962359 T 19981119; ZA 9811776 A 19981222