Patents by Inventor Ming-Chiao Shieh

Ming-Chiao Shieh 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).

  • Optical power stabilizing device
    Patent number: 8837539
    Abstract: An optical power stabilizing device is adapted to stabilize optical power of a light emitting device having a forward voltage, and includes a current generating circuit that generates a pulse-wave driving current to drive light emission of the light emitting device, an optical-type feedback circuit that outputs a first feedback voltage according to detected optical power of the light emitting device, an electrical-type feedback circuit that outputs a second feedback voltage according to the forward voltage, and a pulse wave generating circuit that generates a pulse-wave signal to control the current generating circuit according to one of the first feedback voltage and the second feedback voltage.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: September 16, 2014
    Assignee: National Chi Nan University
    Inventors: Tai-Ping Sun, Hsiu-Li Shieh, Kun-Shuan Huang, Ming-Chiao Shieh