Head-up display with holographic optical element
US10578867B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2017 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | Mar 4, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0181
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A head-up display device for displaying a virtual image superimposed over a field of view to a viewer is provided. The head-up display device includes a picture generating unit having an illumination source, such as a laser, to generate a real image following a first light beam. A windshield of a vehicle engages the first light beam, either at an inclined angle or perpendicular, to reflect the first light beam away from the viewer as reflected images. A combiner disposed on the windshield including a holographic optical element steers the first light beam toward the viewer as a third light beam to present the virtual image within the field of view of the viewer. Mirrors may direct and magnify first light beam onto the combiner. A method for displaying a virtual image superimposed over a field of view to a viewer using a head-up display device is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.