Display apparatus for superimposing a virtual image into the field of vision of a user
US10895743B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2017 |
| Grant date | Jan 19, 2021 |
| Priority date | — |
| Expiry date | Jan 25, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0174
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a display apparatus for superimposing a virtual image into the field of vision of a user of the display apparatus, having spectacles for the user and at least one projection device for producing light rays which are transferred by means of an optical unit of the spectacles into a beam path which produces a virtual image for the user. The optical unit may comprise a ground-glass screen or lens array and a holographic optical imaging unit. The ground-glass screen or lens array and holographic optical imaging unit are arranged in such a way that the light rays produced by the projection device are incident on the holographic optical imaging unit through the ground-glass screen or the lens array and are transferred by the holographic optical imaging unit into the beam path which produces the virtual image for the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.