Patents by Inventor Wen-Gong Chen

Wen-Gong Chen 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 driving circuit
    Patent number: 7138770
    Abstract: An LED driving circuit that is directly activated by an AC power supply is disclosed. A driving circuit has a first and second pair of opposite branches. The first pair of opposite branches operates in a positive half cycle of the AC power supply and the second pair of branches operates in a negative half cycle of the AC power supply, so the lighting time for each LED is less than a half cycle time, in other words, the time for heat dissipation is prolonged.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: November 21, 2006
    Assignee: Top Union Globaltek Inc.
    Inventors: Chii-Maw Uang, Wen-Gong Chen
  • LED driving circuit
    Publication number: 20060138971
    Abstract: An LED driving circuit that is directly activated by an AC power supply is disclosed. A driving circuit has a first and second pair of opposite branches. The first pair of opposite branches operates in a positive half cycle of the AC power supply and the second pair of branches operates in a negative half cycle of the AC power supply, so the lighting time for each LED is less than a half cycle time, in other words, the time for heat dissipation is prolonged.
    Type: Application
    Filed: December 27, 2004
    Publication date: June 29, 2006
    Applicant: TOP UNION GLOBALTEK INC
    Inventors: Chii-Maw Uang, Wen-Gong Chen