EP 1066739 B1 20020227 - METHOD AND DEVICE FOR DETECTING THE RECTIFICATION EFFECT OCCURRING IN A GAS-DISCHARGE LAMP
Title (en)
METHOD AND DEVICE FOR DETECTING THE RECTIFICATION EFFECT OCCURRING IN A GAS-DISCHARGE LAMP
Title (de)
VERFAHREN UND VORRICHTUNG ZUM ERFASSEN DES IN EINER GASENTLADUNGSLAMPE AUFTRETENDEN GLEICHRICHTEFFEKTS
Title (fr)
PROCEDE ET DISPOSITIF PERMETTANT DE DETECTER L'EFFET REDRESSEUR APPARAISSANT DANS UNE LAMPE A DECHARGE
Publication
Application
Priority
- DE 19757635 A 19971223
- DE 19829434 A 19980701
- EP 9807428 W 19981119
Abstract (en)
[origin: WO9934647A1] The invention relates to a method for detecting the rectification effect occurring in a gas-discharge lamp (G1, G2) and to an electronic lamp ballast for operating a gas-discharge lamp (G1, G2) with which such a method is used. The electronic lamp ballast comprises a monitoring or control circuit (IC2) which monitors an operating variable of a load circuit (E) of the electronic lamp ballast, whereby said operating variable corresponds to or is dependent on the lamp voltage. The monitoring circuit (IC2) integrates this monitored operating variable for a full period and infers the presence of a rectification effect if the integration result deviates from a predetermined integration set value. In addition, in order to detect the rectification effect the duration of the positive and negative half waves of the variables being monitored can be compared.
IPC 1-7
IPC 8 full level
H05B 41/28 (2006.01); H05B 41/298 (2006.01)
CPC (source: EP US)
H05B 41/2985 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE ES FI FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9934647 A1 19990708; AT E213901 T1 20020315; AU 1339599 A 19990719; AU 738151 B2 20010913; DE 19882031 D2 20001012; DE 59803245 D1 20020404; EP 1066739 A1 20010110; EP 1066739 B1 20020227; NO 20003259 D0 20000622; NO 20003259 L 20000821; NO 325778 B1 20080714; NZ 505209 A 20021220; US 6400095 B1 20020604
DOCDB simple family (application)
EP 9807428 W 19981119; AT 98956934 T 19981119; AU 1339599 A 19981119; DE 19882031 T 19981119; DE 59803245 T 19981119; EP 98956934 A 19981119; NO 20003259 A 20000622; NZ 50520998 A 19981119; US 58210500 A 20000713