Search International and National Patent Collections

1. (WO2001039556) CIRCUIT DEVICE FOR OPERATING A DISCHARGE LAMP BY MEANS OF A HIGH-FREQUENCY CURRENT

Pub. No.:    WO/2001/039556    International Application No.:    PCT/EP2000/010612
Publication Date: Fri Jun 01 01:59:59 CEST 2001 International Filing Date: Fri Oct 27 01:59:59 CEST 2000
IPC: H02M 1/00
H05B 41/28
Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V.
Inventors: AENDEKERK, Everaard, M., J.
WESSELS, Johannes, H.
Title: CIRCUIT DEVICE FOR OPERATING A DISCHARGE LAMP BY MEANS OF A HIGH-FREQUENCY CURRENT
Abstract:
In a ballast circuit for operating a discharge lamp, two different lamp power levels are adjustable. The ballast circuit is equipped with a switch to optimize the amount of power feedback for the lamp power level.