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:
Sep. 28, 2010
Filed:
Aug. 27, 2003
Christian Schanz, Neuburg, DE;
Matthias Rupprecht, Straubenhardt, DE;
Christian Schanz, Neuburg, DE;
Matthias Rupprecht, Straubenhardt, DE;
Harman Becker Automotive Systems GmbH, Karlsbad, DE;
Abstract
The invention relates to a control system for at least two light tubes connected to a common transformer circuit. The control system comprises a control circuit which is provided with at least two detection inlets (a, a) used for detecting lamp currents (I, I) passing through the first and second light tubes, respectively. The detected lamp currents (I, I) can be regulated to a day mode with a high current intensity, and in a night mode with a low current intensity by the control circuit. The lamp currents (I, I) can be detected individually in day mode and in a common manner in night mode. The control system reduces instability of the tubes, in particular flicker.