Imaging light guide with reflective turning array
US10007117B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2015 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Dec 27, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0134
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging light guide has a waveguide and an in-coupling diffractive optic formed on the waveguide and disposed to direct image-bearing light beams into the waveguide. An array of two or more at least partially reflective surfaces are oriented in parallel and disposed to expand the image-bearing light beams from the in-coupling diffractive optic in a first dimension and to direct the expanded image-bearing light beams toward an out-coupling diffractive optic. The out-coupling diffractive optic is formed on the waveguide and disposed to expand the image-bearing light beams in a second dimension orthogonal to the first dimension and to direct the image-bearing light beams toward a viewer eyebox.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.