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:
Jun. 16, 2026
Filed:
Nov. 22, 2024
Continental Automotive Technologies Gmbh, Hannover, DE;
Emil Kovatchev, Vienna, AT;
CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH, Hannover, DE;
Abstract
A driver circuit for supplying a constant current to an LED arrangement, which is formed by a step-down converter including, in series with a coil, a current measuring resistor measuring current through the coil. A two-point control circuit switches a first switching element on or off depending on the measured current through the coil to keep the average current through the LED arrangement constant. A current amplifier circuit connected to the current measuring resistor detects current flowing through it and, by superimposing an offset voltage applied to one of the inputs thereof by an offset voltage source, can measure both positive and negative current. The output terminal thereof is connected to the input terminals of the two-position control circuit. The offset voltage is superimposed on the threshold voltages thereof. A starting pulse circuit is provided, and connected via a diode to the control input of the first switching element.