Patent · US Expired

Circuit arrangement for starting and operating gas discharge lamps

US4994716A · kind A · utility

5Cited by

8References

22Claims

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	Aug 25, 1986
Grant date	Feb 19, 1991
Priority date	—
Expiry date	Aug 25, 2006

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 gas discharge lamps with current of higher frequency comprises an electronic ballast unit connected to a direct voltage input source (2). An electronic switching element (3), which is controlled by a control device (8), is connected in series with an inductive element (4), and the discharge lamp (5). The lamp current flows through the inductive element from which a voltage is derived which is supplied to the control device as a supply direct voltage supply via a rectifier (14) and a smoothing capacitor (16). A first connection terminal of the smoothing capacitor is connected through a first ohmic resistor (18) to a first terminal of the direct voltage input source and a second connection of the capacitor is connected through the lamp (5) to a second terminal of the direct voltage input source.

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