Multi-focal plane head-up display
US11169377B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 2020 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Sep 16, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0196
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-focal plane head-up display includes a main body, a projector, a first reflective element, a second reflective element, a polarizing element and a third reflective element. The polarization direction of a first image light in the first region of the projection image projected by the projector and the polarization direction of a second image light in the second region of the projection image are orthogonal to each other. The first image light passes through the first reflective element and the polarizing element to form a first virtual image. The second image light passes through the second reflective element, the polarizing element and the third reflective element to form a second virtual image. This can not only provide two virtual images with different focal planes, but also reduce the volume occupied by the head-up display and reduce manufacturing costs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.