The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2012
Filed:
Dec. 18, 2006
Martin Honsberg-riedl, Teisendorf, DE;
Andreas Huber, Maisach, DE;
Simon Lankes, Falkensee, DE;
Burkhard Ulrich, Rosenfeld, DE;
Martin Honsberg-Riedl, Teisendorf, DE;
Andreas Huber, Maisach, DE;
Simon Lankes, Falkensee, DE;
Burkhard Ulrich, Rosenfeld, DE;
Osram AG, München, DE;
Abstract
A circuit arrangement for operating a high-pressure discharge lamp () with an electronic ballast, which is designed to provide an AC feed signal for the high-pressure discharge lamp (). The AC feed signal comprises, in the time range as modulation period (T), a serial sequence of at least one first signal section (Sa), one second signal section (Sa) and one third signal section (Sa), which are associated with a first, a second and a third color. The AC feed signal is an amplitude-modulated RF signal (I) with a frequency (f) of at least 500 kHz. The following applies for the envelope (E) of the signal components with a positive and/or negative amplitude: the absolute value of the envelope (E) has a mean amplitude (M); and the first signal section (Sa) and/or the second signal section (Sa) and/or the third signal section (Sa) has/have at least one temporal range in which the absolute value of the envelope (E) is between 5% and 100% greater than the mean amplitude and/or in which the absolute value of the envelope (E) is between 5% and 90% less than the mean amplitude (M).