Scanned display with switched feeds and distortion correction
US6795221B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1999 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Aug 5, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/101
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display or image capture apparatus includes a scanning assembly that scans about two or more axes, typically in a raster pattern. A plurality of light sources emit light from spaced apart locations toward the scanning assembly and the scanning assembly simultaneously scans more than one of the beams. The light sources are positioned so each beam illuminates a discrete region of the image field that is substantially non-overlapping with the other regions. Each line of the image is formed from segments where two or more of the segments define a line of an image. Because the lines are made from discrete segments, the problem of raster pinch is reduced. The achievable resolution of the display for a given scan angle and mirror size is increased relative to a mirror sweeping a single beam. Segments of different wavelengths can be overlapped to produce a color display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.