Patent · US Active

Illuminating system having sequential color filtering and a high-pressure discharge lamp

US8339061B2 · kind B2 · utility

0Cited by

7References

12Claims

0Family size

Assignee

OSRAM GmbH · DE

Inventors

Florian Heike · Taipei, TW
Andreas Huber · Holzgerlingen, DE
Simon Lankes · Falkensee, DE
Andreas Osten · Berlin, DE

Key dates

Filing date	Apr 26, 2004
Grant date	Dec 25, 2012
Priority date	—
Expiry date	Jun 26, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH04N9/315
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The invention relates to a novel operating method and corresponding ballast for illuminating systems having temporally sequential color filtering and a high-pressure discharge lamp operated by alternating current. In this case, at least three commutations of the lamp current are used within a color filtering sequence, in order to be able to operate the lamp advantageously without an excessive increase in the operating frequency of the color filter system.

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