Patents by Inventor Pascal Bracken

Pascal Bracken has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • SYSTEM AND METHOD FOR ESTIMATING THE JUNCTION TEMPERATURE OF A LIGHT EMITTING DIODE
    Publication number: 20110031903
    Abstract: A method of estimating the junction temperature of a light emitting diode comprises driving a forward bias current through the diode, the current comprising a square wave which toggles between high and low current values (Ihigh, llow), the high current value (lhigh) comprising an LED operation current, and the low current value (IIOW) comprising a non-zero measurement current. The forward bias voltage drop (Vf) is sampled and the forward bias voltage drop (Vflow) is determined at the measurement current (IIOW)—The temperature is derived from the determined forward bias voltage drop.
    Type: Application
    Filed: January 27, 2009
    Publication date: February 10, 2011
    Applicant: NXP B.V.
    Inventors: Viet Nguyen Hoang, Radu Surdeanu, Pascal Bracken, Benoit Bataillou, David Van Steenwinckel