Patent · US Expired

Circuit arrangement for starting and operating a high-pressure gas discharge lamp

US4539513A · kind A · utility

8Cited by

4References

9Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Hans G. Ganser · Stolberg, DE
Ralf Schafer · Marbach, DE
Hans Peter Stormberg · Stolberg, DE

Key dates

Filing date	Nov 25, 1983
Grant date	Sep 3, 1985
Priority date	—
Expiry date	Nov 25, 2003

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S315/07
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A circuit arrangement for starting and operating a high-pressure gas discharge lamp having an outer starting electrode connected to an igniter. A full-wave rectifier (1) is connected to an alternating voltage supply (A, B) and has an output shunted by a series arrangement of a diode (4) and a capacitor (5). The capacitor is discharged in part through the lamp (3) after each half period of the alternating voltage. A resistor (6), which is high-ohmic with respect to a current limiter (2), is connected in the current circuit between the end of the capacitor (5) facing the diode (4) and the lamp (3). Thus, starting of the lamp is facilitated.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.