Patents by Inventor Joshua N. Midgal

Joshua N. Midgal 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).

  • LED with controlled capacitive discharge for photo sensing
    Patent number: 6870148
    Abstract: A method and apparatus determining an intensity of light flux. First, a photodiode or LED is charged by reverse-biasing to a fixed voltage. The fixed voltage is a sum of a threshold voltage and a predetermined offset voltage. Then, a time to discharge the photodiode to the threshold voltage by a photo current is measured to determine an intensity of light producing the photocurrent.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: March 22, 2005
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Paul H. Dietz, William S. Yerazunis, Joshua N. Midgal
  • LED with controlled capacitive discharge for photo sensing
    Publication number: 20040056608
    Abstract: A method and apparatus determining an intensity of light flux. First, a photodiode or LED is charged by reverse-biasing to a fixed voltage. The fixed voltage is a sum of a threshold voltage and a predetermined offset voltage. Then, a time to discharge the photodiode to the threshold voltage by a photo current is measured to determine an intensity of light producing the photocurrent.
    Type: Application
    Filed: June 3, 2003
    Publication date: March 25, 2004
    Inventors: Paul H. Dietz, William S. Yerazunis, Joshua N. Midgal