Search International and National Patent Collections

1. (WO1999008491) METHOD AND DEVICE FOR PRODUCING SERIES OF IMPULSE VOLTAGES TO OPERATE DISCHARGE LAMPS AND CIRCUIT PERTAINING THERETO

Pub. No.:    WO/1999/008491    International Application No.:    PCT/DE1998/001992
Publication Date: Fri Feb 19 00:59:59 CET 1999 International Filing Date: Fri Jul 17 01:59:59 CEST 1998
IPC: H05B 41/28
Applicants: PATENT-TREUHAND-GESELLSCHAFT FÜR ELEKTRISCHE GLÜHLAMPEN MBH
VOLLKOMMER, Frank
HITZSCHKE, Lothar
Inventors: VOLLKOMMER, Frank
HITZSCHKE, Lothar
Title: METHOD AND DEVICE FOR PRODUCING SERIES OF IMPULSE VOLTAGES TO OPERATE DISCHARGE LAMPS AND CIRCUIT PERTAINING THERETO
Abstract:
The invention relates to a method for producing series of impulse voltages to operate discharge lamps (8) by means of pulsed, dielectrically impeded discharge. According to said method, the series of impulse voltages consists of two series of partial voltages so that the total peak values of each series of partial voltages is lower than the total peak values of the resulting series of impulse voltage e.g. half as big. One advantage is that correspondingly lower EMI arises when the series of partial voltages are produced. Also both series of partial voltages have opposite inclined rising edges in relation to a reference potential. Preferably, both series of partial voltages are inverted. This provides ideal and full compensation, at least locally, of electromagnetic interference (EMI) produced by both series of partial voltages. A circuit thus includes two series connected impulse circuits (1; 2) which are synchronised using a timing circuit (3).