Image projection systems and methods
US10534179B1 · kind B1 · utility
18Cited by
0References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2017 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Apr 28, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0194
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods of image projection are presented herein. Image projection may be facilitated by a layered waveguide and/or other components. The layered waveguide may have an input portion and a presentation portion. Light may be received from a display at the input portion and output at the presentation portion. Th input portion may include coupling optical features. The presentation portion ma include presentation optical features forming Bragg diffraction gratings. Relative proportions of light emitted by the display and coupled onto the layers may be controlled adjust a cumulative focal length of the layered waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.