Patents by Inventor Stephen E. Crump

Stephen E. Crump 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).

  • Automatic Compensation For Degradation Of Optocoupler Light Emitting Diode
    Publication number: 20100109545
    Abstract: A system and method for compensating for degradation of a light emitting diode includes accumulating time that the light emitting has been lit. An additional amount of drive current to be provided to the light emitting diode is determined based on the accumulated time that the light emitting diode has been lit. The system includes a controller that accumulates the time that the light emitting diode has been lit and determines the amount of addition drive current to be provided to the light emitting diode.
    Type: Application
    Filed: October 7, 2009
    Publication date: May 6, 2010
    Applicant: Liebert Corporation
    Inventors: Chad D. Eiring, Daniel M. Chrystal, Mark K. Valesky, Stephen E. Crump