Patents by Inventor Xifeng Zheng

Xifeng Zheng 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).

  • Patent number: 11837139
    Abstract: Disclosed is a method for collection and correction of a display unit. The method includes: placing a camera in front of a display unit to be corrected; collecting RGB brightness data of the display unit to be corrected to obtain an original brightness matrix; placing a standard brightness plane in front of a lens of the camera; obtaining a final brightness correction matrix of the camera according to the collected RGB brightness data of the standard brightness plane; multiplying the original brightness matrix by the final brightness correction matrix to obtain a restored real brightness matrix; and performing brightness correction on the real brightness matrix to obtain a corrected brightness matrix. A plurality of the display units corrected by the present disclosure are completely the same in terms of absolute brightness value, and positions of the display units can be arbitrarily changed with each other on the screen.
    Type: Grant
    Filed: August 25, 2022
    Date of Patent: December 5, 2023
    Assignee: CHANGCHUN CEDAR ELECTRONICS TECHNOLOGY CO., LTD
    Inventors: Xifeng Zheng, Xinyue Mao, Tiefu Ding, Guixin Guo, Yang Wang
  • Publication number: 20230387086
    Abstract: The present disclosure provides a light-emitting pixel layout structure, a display panel and an electronic device, relating to the technical field of display technology, which solves the problem of display image deformation caused by layout of existing light-emitting diode (LED) pixels. Light-emitting pixels include primary color pixels 101, primary color pixels 102 and primary color pixels 103, the layout structure includes homogeneous primary color rows arranged in an interlaced manner and heterogeneous primary color rows formed by alternate layout of the other two primary color pixels. The present disclosure is applicable to any existing display structure that uses a plurality of point or block light sources as light-emitting pixels. The present disclosure can improve the clarity of a display screen, avoid display deformation, avoid color lines at edges after cutting, obtain a high pixel resolution, and improve the degree of fusion of image edges.
    Type: Application
    Filed: August 10, 2023
    Publication date: November 30, 2023
    Inventors: Xifeng ZHENG, Ruiguang WANG, Yang WANG, Fanyang XING, Yu CHEN, Hui CAO
  • Publication number: 20220415238
    Abstract: Disclosed is a method for collection and correction of a display unit. The method includes: placing a camera in front of a display unit to be corrected; collecting RGB brightness data of the display unit to be corrected to obtain an original brightness matrix; placing a standard brightness plane in front of a lens of the camera; obtaining a final brightness correction matrix of the camera according to the collected RGB brightness data of the standard brightness plane; multiplying the original brightness matrix by the final brightness correction matrix to obtain a restored real brightness matrix; and performing brightness correction on the real brightness matrix to obtain a corrected brightness matrix. A plurality of the display units corrected by the present disclosure are completely the same in terms of absolute brightness value, and positions of the display units can be arbitrarily changed with each other on the screen.
    Type: Application
    Filed: August 25, 2022
    Publication date: December 29, 2022
    Inventors: Xifeng Zheng, Xinyue Mao, Tiefu Ding, Guixin Guo, Yang Wang
  • Patent number: 9019322
    Abstract: A display driver circuitry with permutation and superposition gray-level control comprises a gray-level controller. The controller may comprise a permutation and superposition adder configured to divide N-bit gray-level data G into M most significant bits, serving as a superposition reference GH, and (N?M) least significant bits, serving as a superposition increment GL, and to superpose superposition values Xi onto GH to derive pieces of scan data Gi for S scan operations; an overflow bit setting unit configured to set an overflow bit F; and an output unit configured to output the scan data Gi. A display driven this way has an improved refreshing frequency with the same gray-level reproduction ability as PWM-based schemes. Further, the duration of each scan operation, or scan period, is constant, resulting in convenience in software implementations. Furthermore, the pulse width representative of the gray-level value is determined by superposition of the scan operations.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: April 28, 2015
    Assignee: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences
    Inventors: Tiefu Ding, Ruiguang Wang, Xifeng Zheng, Feng Chang
  • Publication number: 20120287178
    Abstract: A display driver circuitry with permutation and superposition gray-level control comprises a gray-level controller. The controller may comprise a permutation and superposition adder configured to divide N-bit gray-level data G into M most significant bits, serving as a superposition reference GH, and (N-M) least significant bits, serving as a superposition increment GL, and to superpose superposition values Xi onto GH to derive pieces of scan data Gi for S scan operations; an overflow bit setting unit configured to set an overflow bit F; and an output unit configured to output the scan data Gi. A display driven this way has an improved refreshing frequency with the same gray-level reproduction ability as PWM-based schemes. Further, the duration of each scan operation, or scan period, is constant, resulting in convenience in software implementations. Furthermore, the pulse width representative of the gray-level value is determined by superposition of the scan operations.
    Type: Application
    Filed: December 21, 2010
    Publication date: November 15, 2012
    Applicant: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences
    Inventors: Tiefu Ding, Ruiguang Wang, Xifeng Zheng, Feng Chang