Patents by Inventor Yi-Yuan Wang

Yi-Yuan Wang 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).

  • LIGHT SOURCE DRIVING APPARATUS AND CURRENT ADJUSTING METHOD THEREOF
    Publication number: 20210014943
    Abstract: A light source driving apparatus including a primary side and a secondary side is provided. The light source driving apparatus includes an isolated current sensing circuit, a dimming circuit, an independent voltage source, and a feedback circuit. The isolated current sensing circuit is coupled to the secondary side, and samples an output current of the light source driving apparatus by electromagnetic coupling to generate a current sensing signal. The dimming circuit receives a dimming input signal, and provides a reference controlled-current signal according to the dimming input signal and based on an operating voltage. The independent voltage source is configured to generate the operating voltage. Based on the operating voltage, the feedback circuit provides a feedback signal according to the current sensing signal and the reference controlled-current signal for adjusting the output current of the light source driving apparatus.
    Type: Application
    Filed: September 11, 2019
    Publication date: January 14, 2021
    Applicants: LITE-ON ELECTRONICS (GUANGZHOU) LIMITED, Lite-On Technology Corporation
    Inventors: Yi-Yuan Wang, Feng-Hsu Lin
  • Light source driving apparatus and current adjusting method thereof
    Patent number: 10880961
    Abstract: A light source driving apparatus including a primary side and a secondary side is provided. The light source driving apparatus includes an isolated current sensing circuit, a dimming circuit, an independent voltage source, and a feedback circuit. The isolated current sensing circuit is coupled to the secondary side, and samples an output current of the light source driving apparatus by electromagnetic coupling to generate a current sensing signal. The dimming circuit receives a dimming input signal, and provides a reference controlled-current signal according to the dimming input signal and based on an operating voltage. The independent voltage source is configured to generate the operating voltage. Based on the operating voltage, the feedback circuit provides a feedback signal according to the current sensing signal and the reference controlled-current signal for adjusting the output current of the light source driving apparatus.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: December 29, 2020
    Assignees: LITE-ON ELECTRONICS (GUANGZHOU) LIMITED, Lite-On Technology Corporation
    Inventors: Yi-Yuan Wang, Feng-Hsu Lin