Viewing device for widescreen comprising means of correcting the doubling of images due to said widescreen
US8264621B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 2009 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Mar 10, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/014
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The general technical field of the invention is that of viewing devices mounted on vehicles and comprising a display whose image is reflected by the windscreen of the vehicle, making it possible to superimpose the displayed image on the outside world. One of the major problems with this type of display is that the windscreen gives, by reflection, two non-superimposed doubled images. The basic principle of the invention is that the initial image is such that the combination of the first reflected image and the second image reflected by the windscreen gives a “clean” or “ideal” perceived image without any offsets. To perform this function, an image is generated on the display that comprises, obviously, the “ideal” image, but also a succession of offset images comprising negatives of the “ideal” image so that the resultant sum of the first reflected image and of the second reflected image includes no more than the “ideal” image. Obviously, the principle of the invention can be applied to simple displays or to displays comprising an image collimated to infinity or to a great distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.