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. 12, 2017
Filed:
Apr. 15, 2016
Infineon Technologies Austria Ag, Villach, AT;
Marco Pamato, Schio, IT;
Maurizio Galvano, Padua, IT;
Infineon Technologies Austria AG, Villach, AT;
Abstract
Techniques are disclosed for regulating the temperature of a plurality of light-emitting diodes (LEDs) by monitoring the voltage drop across the LEDs. In one example, a driver circuit supplies a constant driver current to the LEDs. A temperature regulation circuit monitors the voltage drop across the LEDs to determine whether the junction temperature of the LEDs exceeds a maximum operating temperature. If the junction temperature of the LEDs exceeds the maximum operating temperature, the temperature regulation circuit uses digital pulse-width modulation (DPWM) to decrease a digital duty cycle of the driver current supplied to the LEDs.