LED illuminated waveguide projector display
US12135447B2 · kind B2 · utility
0Cited by
1References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 2023 |
| Grant date | Nov 5, 2024 |
| Priority date | — |
| Expiry date | Jun 29, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0172
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is provided a projection display, and a method for illuminating a projection display. The projection display comprising a waveguide comprising an input grating having a plurality of linear diffractive features, the input grating configured to couple in light into the waveguide, and an array of LEDs configured to form an illumination pupil which is optically relayed as an input pupil onto the input grating, such that at the input grating the input pupil has a shape that is larger in a direction parallel to the linear diffractive features than in a direction perpendicular to the linear diffractive features.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.