US Patent Issued to SOUTHEAST UNIVERSITY on Feb. 18 for "Two-dimensional exit pupil expansion method for waveguide display based on polarization volume gratings" (Chinese Inventors)

ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,228,730, issued on Feb. 18, was assigned to SOUTHEAST UNIVERSITY (Nanjing, China).

"Two-dimensional exit pupil expansion method for waveguide display based on polarization volume gratings" was invented by Yishi Weng (Nanjing, China), Yuning Zhang (Nanjing, China), Yuchen Gu (Nanjing, China), Lixuan Zhagn (Nanjing, China), Chuang Wang (Nanjing, China) and Ran Wei (Nanjing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "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...