Head-up display
US6836369B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2003 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Apr 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0101
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a head-up display having a prism sheet interposed between a display device and the position of an observer's eye. Control is extended so that points from which light rays having different wavelengths emerge are made different by a predetermined distance from each other so as not to form images at different points by light rays from a point source, relative to the difference between the wavelengths. Otherwise, a distance to an image in a vertical direction is made shorter by a predetermined distance than a distance thereto in a horizontal direction. The vertical angle of each of prisms included in the prism sheet is asymmetrical to a normal to the surface of the prism sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.