Patents by Inventor Zulong Liu

Zulong Liu 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).

  • Lighting apparatus
    Patent number: 11963278
    Abstract: A lighting apparatus includes a surge voltage protector, a first rectifier, a first DC-DC converter, a first DC filter, a first constant current source, a second rectifier, a second DC-DC converter, a second DC filter, a second constant current source, a first PWM generator, a second PWM generator, a dimmer controller, a first light source and a second light source. The surge voltage protector is coupled to an external power for relaying an AC power. When there is a surge voltage is detected, the surge voltage protector disable routing the AC power. There are two or more paths of power circuits each generating a limited power. These power circuits are placed in the same container to simplify the overall design.
    Type: Grant
    Filed: November 27, 2022
    Date of Patent: April 16, 2024
    Assignee: LEEDARSON LIGHTNG CO., LTD.
    Inventors: Shuisheng Wen, Haiyan Chen, Zulong Liu, Bin Liu
  • LIGHTING APPARATUS
    Publication number: 20230397313
    Abstract: A lighting apparatus includes a surge voltage protector, a first rectifier, a first DC-DC converter, a first DC filter, a first constant current source, a second rectifier, a second DC-DC converter, a second DC filter, a second constant current source, a first PWM generator, a second PWM generator, a dimmer controller, a first light source and a second light source. The surge voltage protector is coupled to an external power for relaying an AC power. When there is a surge voltage is detected, the surge voltage protector disable routing the AC power. There are two or more paths of power circuits each generating a limited power. These power circuits are placed in the same container to simplify the overall design.
    Type: Application
    Filed: November 27, 2022
    Publication date: December 7, 2023
    Inventors: Shuisheng Wen, Haiyan Chen, Zulong Liu, Bin Liu