Temporally incoherent and spatially coherent source for waveguide displays
US10705341B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2017 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | Oct 2, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A waveguide display includes a source assembly, an output waveguide, and a controller. The source assembly includes a light source and an optics system. The light source includes source elements arranged in a 1D or 2D array that emit image light that is temporally incoherent and spatially coherent. In some embodiments, the light source includes an array of superluminous LEDs, an array of laser diodes, an array of resonant cavity LEDs, or some combination thereof. The optics system includes a scanning assembly that scans the image light to particular locations based on scanning instructions. The output waveguide receives the scanned image light from the scanning assembly and outputs an expanded image light. The controller generates the scanning instructions and provides the scanning instructions to the light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.