The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2025
Filed:
Dec. 29, 2022
Southeast University, Nanjing, CN;
Yishi Weng, Nanjing, CN;
Yuning Zhang, Nanjing, CN;
Yuchen Gu, Nanjing, CN;
Lixuan Zhagn, Nanjing, CN;
Chuang Wang, Nanjing, CN;
Ran Wei, Nanjing, CN;
SOUTHEAST UNIVERSITY, Nanjing, CN;
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.