Near-eye display apparatus
US10330937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2018 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Jan 3, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2213/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A wearable augmented reality (AR) or virtual reality (VR) display apparatus includes an optical waveguide; an optical free-form surface; and a microdisplay; wherein optical free-form surface is optically coupled to the waveguide through an inclined optical path. A near-eye display apparatus includes two or more layers of waveguide plates arranged to overlap with each other, wherein within each layer of the waveguide plate includes multiple reflective surfaces different in reflectivity, so as to ensure that light transmitted through the waveguide plate has a substantially uniform distribution of intensity in a predetermined area when exiting outward from the waveguide plate. The waveguide optical element is ultrathin so as to be directly mounted into a spectacle frame. User experience and contrast level are also improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.