Patents by Inventor Wenhong Ling

Wenhong Ling 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 driver circuit with stepwise adjustable power and LED lighting tube
    Patent number: 9462645
    Abstract: An LED driver circuit with stepwise adjustable power and an LED lighting tube. The LED driver circuit comprises a constant current IC chip U1, a power supply unit connecting to the constant current IC chip U1, a switch control unit and a driving unit. The driving unit connects to the switch control unit. The LED driver circuit also comprises a power regulation unit. The power regulation unit connects to the constant current IC chip U1, the switch control unit and the driving unit. The present invention uses 12 W, 15 W, 18 W (or) more stepwise adjustable power. It is applicable to LED lighting tubes, ceiling lights, panel lights and all types of LED stepwise adjustable power.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: October 4, 2016
    Inventors: Haibin Cai, Wenhong Ling