Augmented reality display having improved FOV, and waveguide device and diffractive optical structures thereof
US12044848B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2020 |
| Grant date | Jul 23, 2024 |
| Priority date | — |
| Expiry date | Jul 10, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Various embodiments may provide an augmented reality display having an improved FOV, and a waveguide device and diffractive optical structures thereof. The augmented reality display may comprise: a light source configured to generate light related to an image; and the waveguide device for outputting at least a part of the light. The waveguide device may comprise: a waveguide for guiding light therein; and the diffractive optical structures arranged on a first surface and a second surface of the waveguide. The diffractive optical structures may comprise: a first polarization structure arranged on the first surface of the waveguide to transmit, to the outside of the waveguide, first polarized light selected from external light and reflect, to the inside of the waveguide, second polarized light selected from light guided inside the waveguide device; and a second polarization structure arranged on the second surface of the waveguide to output at least a part of the second polarized light to the outside of the waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.