Patents by Inventor YUANGIANG LIU

YUANGIANG 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).

  • Retrofit lamp and a lighting system using the same
    Patent number: 10986713
    Abstract: A retrofit lamp is to be used with a ballast. A shunt switch is provided in parallel with an output load and is adapted to shunt input terminals of the lamp using pulse width control so as to tune the current through the lighting element. This current control is used to enable compatibility with different ballasts and to provide dimming control. A detection circuit is used to detect an abnormal drive condition of the retrofit lamp and the pulse width control of the shunt switch can then be overridden by holding the shunt switch at a stable state for a certain duration. This prevents overload conditions and avoids DC signals in the event of component failures.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: April 20, 2021
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Dmytro Viktorovych Malyna, Luna X. Zhang, Yuangiang Liu, Gu Yuan Chen, Yun Fei Duan, Tijmen Cornelis Van Bodegraven, Jie Fu, Zhi Quan Chen, Shiguang Sun, Raimundo De Heer Galisteo, Marcus Cornelis Van Meel
  • RETROFIT LAMP AND A LIGHTING SYSTEM USING THE SAME
    Publication number: 20200178371
    Abstract: A retrofit lamp is to be used with a ballast. A shunt switch is provided in parallel with an output load and is adapted to shunt input terminals of the lamp using pulse width control so as to tune the current through the lighting element. This current control is used to enable compatibility with different ballasts and to provide dimming control. A detection circuit is used to detect an abnormal drive condition of the retrofit lamp and the pulse width control of the shunt switch can then be overridden by holding the shunt switch at a stable state for a certain duration. This prevents overload conditions and avoids DC signals in the event of component failures.
    Type: Application
    Filed: July 23, 2018
    Publication date: June 4, 2020
    Inventors: DMYTRO VIKTOROVYCH MALYNA, LUNA X. ZHANG, YUANGIANG LIU, GU YUAN CHEN, YUN FEI DUAN, TIJMEN CORNELIS VAN BODEGRAVEN, JIE FU, GU YUAN CHEN, SHIGUANG SUN, RAIMUNDO DE HEER GALISTEO, MARCUS CORNELIS VAN MEEL