Patent · US Expired

Arrangement for determining the state of a high-pressure gas discharge lamp on switching-on

US6356040B1 · kind B1 · utility

20Cited by

5References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Karl-Heinrich Preis · Bühlertal, DE
Stefan Koch · Mainz, DE
Klaus Eckert · Herbrechtingen, DE
Ernst Damerau · Pfullingen, DE

Key dates

Filing date	Nov 19, 1999
Grant date	Mar 12, 2002
Priority date	—
Expiry date	Nov 19, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/00
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An arrangement for detecting the condition of a high pressure gas discharge lamp when switched on is described, where a control unit either injects a defined current into the lamp and measures the resulting voltage drop, or it applies a defined voltage to the lamp and measures the lamp current flowing in so doing and, depending on the result, it starts the lamp according to the condition of the lamp thus determined.

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