Optical waveguide structure, AR device, and method for obtaining emergent light efficiency of optical waveguide structure
US12222507B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 1, 2021 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | Sep 1, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/01
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided are an optical waveguide structure, an Augmented Reality (AR) device, and a method for obtaining an emergent light efficiency of an optical waveguide structure, which relates to the technical field of display. The optical waveguide structure includes: an optical waveguide body, a coupling-in grating disposed at the optical waveguide body, and a plurality of coupling-out gratings distributed and arranged. The coupling-in grating is configured to couple image light into the optical waveguide body. The optical waveguide body is configured to generate a total internal reflection of the image light to the coupling-out gratings. Diffraction efficiencies of each of the coupling-out gratings are different, and each of the coupling-out gratings is configured to couple the image light out of the optical waveguide body at the same brightness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.