Patent · US Active

Method and electronic operating device for operating a gas discharge lamp and projector

US8602566B2 · kind B2 · utility

4Cited by

5References

20Claims

0Family size

Assignee

OSRAM GmbH · DE

Inventors

Markus Baier · Munich, DE
Martin Brueckel · Nanhu, CN
Bärbel Dierks · Biesenthal, DE
Peter Flesch · Berlin, DE
Josef Kroell · Potsdam, DE
Oskar Schallmoser · Ottobrunn, DE
Kai Wolter · Berlin, DE

Key dates

Filing date	Jan 13, 2010
Grant date	Dec 10, 2013
Priority date	—
Expiry date	Oct 6, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH05B41/2928
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for operating a gas discharge lamp featuring a gas discharge lamp burner and a first and a second electrode, wherein the electrodes have a nominal electrode separation in the gas discharge lamp burner before their first activation and said nominal separation is correlated to the lamp voltage. The method may include checking whether the off-time, corresponding to the time duration between two DC voltage phases, has expired; and if the off-time has expired, omitting commutations or applying pseudo-commutations for a predefined time duration which depends on the lamp voltage in such a way that a time duration of the omission of at least one of commutations and application of pseudo-commutations is predefined for each lamp voltage.

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