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:
Dec. 11, 2001
Filed:
Jul. 13, 2000
Applicant:
Inventors:
Wolfgang Daub, Anroechte, DE;
Volker Radtke, Guetersloh, DE;
Assignee:
Hella KG Hueck & Co., , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01K 7/00 ;
U.S. Cl.
CPC ...
H01K 7/00 ;
Abstract
A diagnostic system for a ballast of a high-pressure gas discharge lamp in a motor vehicle includes the ballast and a separate light control module that controls the ballast via a supply line and in case of a fault, the ballast gives a modulated diagnostic signal via the supply line to the light control module. For this, in case of a fault, the ballast modulates a current that is received, using a switchable current sink, such that the light control module receives coded diagnostic information via the supply line.