Patents by Inventor Junru LIU

Junru 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).

  • Method and apparatus for calculating duty cycle of lighting, terminal, and storage medium
    Patent number: 12604380
    Abstract: The present application provides a method and an apparatus for calculating a duty cycle of a lighting, a terminal, and a storage medium. The method includes: determining a first expression formula of a chromaticity coordinate, a luminous flux and an input duty cycle of each path of three paths of a RGB color light source; calibrating, based on the first expression formula and tristimulus values of the three paths of the RGB color light source under a full current operation, a nonlinear transformation of the luminous flux, to obtain a first duty cycle value; and calibrating, based on the first duty cycle value and the first expression formula, a nonlinear transformation of the chromaticity coordinate, to obtain a second duty cycle value; and controlling displaying colors of the RGB color light source based on the second duty cycle value.
    Type: Grant
    Filed: July 17, 2024
    Date of Patent: April 14, 2026
    Assignee: Leedarson Lighting Co., Ltd.
    Inventors: Cheng Luo, Hao Chen, Junru Liu, Qiqiang Lin, Xiaobo Chen, Zongyuan Liu
  • Method and Apparatus for Calculating Duty Cycle of Lighting, Terminal, and Storage Medium
    Publication number: 20250168948
    Abstract: The present application provides a method and an apparatus for calculating a duty cycle of a lighting, a terminal, and a storage medium. The method includes: determining a first expression formula of a chromaticity coordinate, a luminous flux and an input duty cycle of each path of three paths of a RGB color light source; calibrating, based on the first expression formula and tristimulus values of the three paths of the RGB color light source under a full current operation, a nonlinear transformation of the luminous flux, to obtain a first duty cycle value; and calibrating, based on the first duty cycle value and the first expression formula, a nonlinear transformation of the chromaticity coordinate, to obtain a second duty cycle value; and controlling displaying colors of the RGB color light source based on the second duty cycle value.
    Type: Application
    Filed: July 17, 2024
    Publication date: May 22, 2025
    Inventors: Cheng LUO, Hao CHEN, Junru LIU, Qiqiang LIN, Xiaobo CHEN, Zongyuan LIU