Scanning mirror display devices
US10866426B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2019 |
| Grant date | Dec 15, 2020 |
| Priority date | — |
| Expiry date | Feb 15, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/015
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electronic device may have a light source such as a laser light source. The light source may emit light into a waveguide. A phase grating may diffract the light that is emitted into the waveguide to produce diffracted light. The diffracted light may be oriented parallel to a surface normal of an angled edge of the waveguide and parallel to a surface normal of a microelectromechanical systems mirror element in a two-dimensional scanning microelectromechanical systems mirror that is coupled to the edge of the waveguide. A wave plate may be interposed between the mirror and the edge of the waveguide to change the polarization state of light reflected from the mirror element relative to incoming diffracted light from the phase grating. The phase grating may be configured so that the reflected light is not diffracted by the phase grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.