Patents by Inventor Lixuan ZHAGN

Lixuan ZHAGN 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).

  • Two-dimensional exit pupil expansion method for waveguide display based on polarization volume gratings
    Patent number: 12228730
    Abstract: A two-dimensional exit pupil expansion method for waveguide display based on polarization volume gratings (PVGs) is provided. Based on the polarized diffraction properties of the PVGs as waveguide coupling elements, a light beam from a microimage source system is introduced into and then propagates in a waveguide medium. By a composite PVG structure, a light field of a transmitted image is subjected to two-dimensional exit pupil expansion and emission, and finally incident into human eyes to achieve waveguide augmented reality imaging.
    Type: Grant
    Filed: December 29, 2022
    Date of Patent: February 18, 2025
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Yishi Weng, Yuning Zhang, Yuchen Gu, Lixuan Zhagn, Chuang Wang, Ran Wei
  • TWO-DIMENSIONAL EXIT PUPIL EXPANSION METHOD FOR WAVEGUIDE DISPLAY BASED ON POLARIZATION VOLUME GRATINGS
    Publication number: 20240418986
    Abstract: A two-dimensional exit pupil expansion method for waveguide display based on polarization volume gratings (PVGs) is provided. Based on the polarized diffraction properties of the PVGs as waveguide coupling elements, a light beam from a microimage source system is introduced into and then propagates in a waveguide medium. By a composite PVG structure, a light field of a transmitted image is subjected to two-dimensional exit pupil expansion and emission, and finally incident into human eyes to achieve waveguide augmented reality imaging.
    Type: Application
    Filed: December 29, 2022
    Publication date: December 19, 2024
    Applicant: SOUTHEAST UNIVERSITY
    Inventors: Yishi WENG, Yuning ZHANG, Yuchen GU, Lixuan ZHAGN, Chuang WANG, Ran WEI