Head mounted display
US9618751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2014 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Aug 25, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A head-mounted or helmet-mounted display apparatus is provided. The apparatus includes an optical element which in use is disposed in front of the eyes of a user. The optical element has a waveguide portion. The apparatus further includes a light source of image-bearing light and two diffraction elements. Each diffraction element is configured for propagation of image-bearing light of the light source through the optical element. Each diffraction element is arranged to release the image bearing light from the optical element. The apparatus further includes a switching element for switching the image-bearing light repeatedly between the first diffraction element and the second diffraction element to provide a first visible image or a second visible image to the respective eye of a user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.