EP 0801881 A1 19971022 - METHOD OF OPERATING AT LEAST ONE FLUORESCENT LAMP WITH ELECTRONIC BALLAST, AND BALLAST THEREFOR
Title (en)
METHOD OF OPERATING AT LEAST ONE FLUORESCENT LAMP WITH ELECTRONIC BALLAST, AND BALLAST THEREFOR
Title (de)
VERFAHREN ZUM BETREIBEN MINDESTENS EINER LEUCHTSTOFFLAMPE MIT EINEM ELEKTRONISCHEN VORSCHALTGERÄT SOWIE VORSCHALTGERÄT DAFÜR
Title (fr)
PROCEDE PERMETTANT DE FAIRE FONCTIONNER AU MOINS UNE LAMPE A FLUORESCENCE AU MOYEN D'UN BALLAST ELECTRONIQUE ET BALLAST ELECTRONIQUE UTILISE A CET EFFET
Publication
Application
Priority
- EP 95925814 A 19950703
- EP 9502572 W 19950703
- EP 94111248 A 19940719
Abstract (en)
[origin: WO9603017A1] The invention concerns a method of operating at least one fluorescent lamp (FL) by means of electronic ballast and the ballast itself. A rectifier bridge (GL) at a.c. supply voltage (L, N), a connected high-value regulator (L1, D1, V1), a half-bridge circuit (V2, V3) and a control and regulating circuit (IC) are provided for continuously monitoring the lamp current with a regulated control circuit (CCO, SEL, HSD, LSD) for the power transistors (V2, V3) which maintains the bulb current constant during normal operation. As a master control system, a time-value emitting device (PST, IT, CT), which is activated in a specific manner whenever the lamp is activated or a fault is detected, generates a time base for a monitoring circuit (MON) which evaluates the lamp current at any particular moment at predetermined reference levels (Mp, Mi and Mo) which differ in individual time sections ( DELTA pt, DELTA it, DELTA st, DELTA ot) and which, via the regulated control circuit (CCO, IST, SEL, HSD, LSD), controls the lamp current as a function of time if the lamp starts normally and triggers automatic switching-off of the electronic ballast in the event of a fault.
IPC 1-7
IPC 8 full level
H05B 41/282 (2006.01); H05B 41/298 (2006.01)
CPC (source: EP KR US)
H05B 41/282 (2013.01 - KR); H05B 41/2981 (2013.01 - EP US); Y10S 315/07 (2013.01 - EP US)
Citation (search report)
See references of WO 9603017A1
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9603017 A1 19960201; AT E166525 T1 19980615; AU 2980595 A 19960216; AU 691318 B2 19980514; CA 2195440 A1 19960201; CA 2195440 C 20031223; CN 1076945 C 20011226; CN 1152992 A 19970625; DE 59502290 D1 19980625; EP 0801881 A1 19971022; EP 0801881 B1 19980520; HK 1001034 A1 19980515; JP 3939342 B2 20070704; JP H10503047 A 19980317; KR 100393662 B1 20031030; KR 970703094 A 19970610; TW 266383 B 19951221; US 5705894 A 19980106
DOCDB simple family (application)
EP 9502572 W 19950703; AT 95925814 T 19950703; AU 2980595 A 19950703; CA 2195440 A 19950703; CN 95194206 A 19950703; DE 59502290 T 19950703; EP 95925814 A 19950703; HK 97102276 A 19971128; JP 50463796 A 19950703; KR 19960706267 A 19961106; TW 84106299 A 19950620; US 71836896 A 19960925