Two-dimensional exit pupil expansion method for waveguide display based on polarization volume gratings
US12228730B2 · kind B2 · utility
0Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2022 |
| Grant date | Feb 18, 2025 |
| Priority date | — |
| Expiry date | Dec 29, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0172
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.