Display waveguide assembly with color cross-coupling
US11454809B2 · kind B2 · utility
3Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2018 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | May 8, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0123
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A waveguide display includes a display projector for emitting polychromatic image light, and a waveguide assembly for transmitting image light to an exit pupil. The waveguide assembly includes two or more waveguides disposed in a stack, each having an in-coupler aligned with the other in-couplers and an offset out-coupler aligned with the other out-couplers. The assembly is configured so that at least one color channel of the image light propagates to the exit pupil along at least two waveguides. A method for selecting the waveguides of the stack to suppress color channel splitting at the exit pupil is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.