Waveguide optical element and near-eye display apparatus
US10330938B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2018 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Jan 10, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0125
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-weight and ultrathin waveguide optical element having a large field of view includes two or more layers of waveguide plates provided to be overlapped with each other. Within each layer of the waveguide plate are included multiple reflective surfaces with different reflectivity, such that light transmitted through the waveguide plate has a substantially uniform distribution of intensity in a predetermined area when exiting from the waveguide plate. The waveguide optical element is ultrathin such that it can be directly mounted into a spectacle frame. Use of the waveguide optical element with a projection optical assembly can improve user experience as well as display effect with good contrast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.