Head-up display device and display method thereof
US11320676B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2019 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Feb 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0185
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A head-up display device and a display method thereof are provided. the head-up display device includes: an image source configured to generate and emit light having image information; a first polarization control device configured to receive the light and convert the light into a first polarized light or a second polarized light having a polarization direction different from a polarization direction of the first polarized light; and a focal length switching device configured to transmit the first polarized light and the second polarized light and have different deflection effects on the first polarized light and the second polarized light, such that the first polarized light and the second polarized light passing through the focal length switching device are projected onto a projection screen to respectively present virtual images which are at different distances from the projection screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.