EP 0791281 B1 20011017 - SYSTEM FOR OPERATING A LAMP
Title (en)
SYSTEM FOR OPERATING A LAMP
Title (de)
ANORDNUNG ZUM BETREIBEN EINER LAMPE
Title (fr)
SYSTEME DE MISE EN OEUVRE D'UNE LAMPE
Publication
Application
Priority
- IB 9600762 W 19960731
- US 51285695 A 19950809
Abstract (en)
[origin: WO9706654A1] The invention relates to a system for operating a lamp comprising encoding means for perturbing part of a predetermined number of half periods of the sinusoidal supply voltage, the number of half periods forming a control period, and a ballast circuit with input terminals (1', 2') coupled to the encoding means for receiving the perturbed voltage. The ballast circuit comprises means (A, B, C, E) for generating a lamp current out of the perturbed voltage, means (G) coupled to the means for generating a lamp current, for controlling an operating characteristic of the lamp in dependency of a control signal, and decoding means (I) for generating the control signal depending on the shape of the control period. The perturbations applied by the encoding means change the amplitude of the sinusoidal supply voltage of only a part of each perturbed half period of the supply voltage, thus preventing light flickering.
IPC 1-7
IPC 8 full level
H05B 41/38 (2006.01); H05B 37/02 (2006.01); H05B 41/36 (2006.01); H05B 41/392 (2006.01)
CPC (source: EP)
H05B 41/36 (2013.01); H05B 41/3921 (2013.01); H05B 47/185 (2020.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9706654 A1 19970220; CA 2202070 A1 19970220; CN 1161126 A 19971001; CN 1179607 C 20041208; DE 69616018 D1 20011122; DE 69616018 T2 20020606; EP 0791281 A1 19970827; EP 0791281 B1 20011017; JP H10507578 A 19980721; MX 9702563 A 19970628; TW 354176 U 19990301
DOCDB simple family (application)
IB 9600762 W 19960731; CA 2202070 A 19960731; CN 96190892 A 19960731; DE 69616018 T 19960731; EP 96923024 A 19960731; JP 50826397 A 19960731; MX 9702563 A 19960731; TW 85220476 U 19961221