Patents by Inventor Can Ping Zheng

Can Ping 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).

  • Projection apparatus and keystone correction method
    Patent number: 11838695
    Abstract: A projection apparatus and a keystone correction method thereof are provided. The projection apparatus includes a display processing circuit including an image processing circuit, a first keystone correction circuit, a rotation circuit, a second keystone correction circuit, and a video output circuit. The first keystone correction circuit performs first keystone correction processing on a processed image frame based on horizontal scaling processing to obtain a first corrected image frame. The rotation circuit performs rotation processing on the first corrected image frame to write a rotated image frame into a memory. The second keystone correction circuit reads the rotated image frame from the memory and performs second keystone correction processing on the rotated image frame based on the horizontal scaling processing to obtain a second corrected image frame. The video output circuit transmits the second corrected image frame to a projection module through a data transmission interface.
    Type: Grant
    Filed: January 24, 2022
    Date of Patent: December 5, 2023
    Assignee: ALi Corporation
    Inventors: Feng Gao, Can Ping Zheng, Shan Jian Liu, Lun Liang
  • PROJECTION APPARATUS AND KEYSTONE CORRECTION METHOD
    Publication number: 20220247983
    Abstract: A projection apparatus and a keystone correction method thereof are provided. The projection apparatus includes a display processing circuit including an image processing circuit, a first keystone correction circuit, a rotation circuit, a second keystone correction circuit, and a video output circuit. The first keystone correction circuit performs first keystone correction processing on a processed image frame based on horizontal scaling processing to obtain a first corrected image frame. The rotation circuit performs rotation processing on the first corrected image frame to write a rotated image frame into a memory. The second keystone correction circuit reads the rotated image frame from the memory and performs second keystone correction processing on the rotated image frame based on the horizontal scaling processing to obtain a second corrected image frame. The video output circuit transmits the second corrected image frame to a projection module through a data transmission interface.
    Type: Application
    Filed: January 24, 2022
    Publication date: August 4, 2022
    Applicant: ALi Corporation
    Inventors: Feng Gao, Can Ping Zheng, Shan Jian Liu, Lun Liang