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. 04, 2018
Filed:
Sep. 16, 2015
Kevin Cornelius, Lees Summit, MO (US);
Scott Troutman, Jamestown, NY (US);
Kevin Cornelius, Lees Summit, MO (US);
Scott Troutman, Jamestown, NY (US);
Truck-lite Co. LLC, Falconer, NY (US);
Abstract
A light failure detection system for use in a vehicle having a plurality of light emitting diode lighting devices includes a plurality of voltage level monitoring circuits and plurality of current monitoring circuits for measuring the voltage and current draw of a plurality of lighting circuits. A voltage drop circuit enabling the plurality of voltage level monitoring circuits and the plurality of current monitoring circuits to measure current and voltage at an adjusted input voltage is also provided. The system a learn mode for monitoring the lighting circuits with the plurality of voltage level monitoring circuits and the plurality of current monitoring circuits to determine threshold voltage and current levels for the lighting circuits. An adjusted threshold current, based on a voltage sensitivity and a sensed temperature, is calculated and a fault is indicated when a measured current is above or below the adjusted threshold current by a predetermined value.