Patents by Inventor Ching-Shuan KUO

Ching-Shuan KUO 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).

  • Circuits for driving light sources
    Patent number: 9497812
    Abstract: A light source driving circuit for powering a first light source and a second light source by a DC voltage includes a first current regulator, a second current regulator and a controller. The first current regulator controls a first switch coupled to the first light source based on a first current reference and a first sensing signal. The second current regulator controls a second switch coupled to the second light source based on a second current reference and a second sensing signal. The controller regulates the current through the first light source and the current through the second light source by controlling the first current regulator and the second current regulator. If the DC voltage is within a first range, then the controller turns on the first light source. If the DC voltage is within a second range, then the controller turns on the first light source and the second light source.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: November 15, 2016
    Assignee: O2Micro, Inc.
    Inventors: Sheng-Tai Lee, Ching-Shuan Kuo
  • CIRCUITS FOR DRIVING LIGHT SOURCES
    Publication number: 20160143095
    Abstract: A light source driving circuit for powering a first light source and a second light source by a DC voltage includes a first current regulator, a second current regulator and a controller. The first current regulator controls a first switch coupled to the first light source based on a first current reference and a first sensing signal. The second current regulator controls a second switch coupled to the second light source based on a second current reference and a second sensing signal. The controller regulates the current through the first light source and the current through the second light source by controlling the first current regulator and the second current regulator. If the DC voltage is within a first range, then the controller turns on the first light source. If the DC voltage is within a second range, then the controller turns on the first light source and the second light source.
    Type: Application
    Filed: June 17, 2015
    Publication date: May 19, 2016
    Inventors: Sheng-Tai LEE, Ching-Shuan KUO