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. 11, 2018
Filed:
Aug. 11, 2015
Zkw Group Gmbh, Wieselburg, AT;
ZKW Group GmbH, Wieselburg, AT;
Abstract
A method and a circuit arrangement for feeding n LED units (LEDto LED) of a lighting unit of a motor vehicle by way of a controlled power source () from a voltage source () having a fluctuating operating voltage (U), in which the LED units (LEDto LED) are interconnected, and in particular k LED units (LEDto LED) of a series connection are short-circuited, when the operating voltage (U) drops, taking a stored weighting with respect to the priority assigned to individual LED units into consideration, wherein current continues to flow simultaneously through (n−k) LED units. A memory unit () for storing information about weightings on the priority of certain LED units is assigned to the control unit () for activating the power source, a switching matrix (', Sto S), and in particular a circuit arrangement composed of n controlled switches (Sto S) that each bypass the LED units (LEDto LED, LED) is provided, and the control unit () is configured to compared the operating voltage and/or the current (I) of the power source to predefinable threshold values and to interconnect the LED units as a function of this comparison and the weighting.