Eyepieces for augmented reality display system
US11237393B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2019 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Nov 20, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0127
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An eyepiece waveguide for an augmented reality display system. The eyepiece waveguide can include an input coupling grating (ICG) region. The ICG region can couple an input beam into the substrate of the eyepiece waveguide as a guided beam. A first combined pupil expander-extractor (CPE) grating region can be formed on or in a surface of the substrate. The first CPE grating region can receive the guided beam, create a first plurality of diffracted beams at a plurality of distributed locations, and out-couple a first plurality of output beams. The eyepiece waveguide can also include a second CPE grating region formed on or in the opposite surface of the substrate. The second CPE grating region can receive the guided beam, create a second plurality of diffracted beams at a plurality of distributed locations, and out-couple a second plurality of output beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.