Head-up display apparatus
US10942352B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2016 |
| Grant date | Mar 9, 2021 |
| Priority date | — |
| Expiry date | Jun 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0116
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A laser projection portion projects multiple laser light fluxes having different wavelengths and superimposed one on another. A scan portion scans the laser light fluxes from the laser projection portion. The image is drawn on a screen member upon incidence of the laser light fluxes scanned by the scan portion. A refraction element portion having positive refractive power is located on a light path between the scan portion and the screen member and adjusts an incident angle of the laser light fluxes to the screen member by refraction. The refraction element portion includes a positive lens part and a negative lens part. The positive lens part has positive refractive power. The negative lens part is made of a medium with a higher dispersing quality than a medium forming the positive lens part and has negative refractive power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.