Multi-viewer three dimensional (3-D) virtual display system and operating method therefor
US5781229A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1997 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Feb 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/398
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A three-dimensional (3-D) virtual display system for displaying a flicker-free 3-D virtual image to each of N viewers randomly dispersed about a horizontally disposed viewing screen, where N is an integer greater than 1, includes a laser projector for generating N.times.M image pairs responsive to a video signal comprising the N.times.M image pairs, N transmitters associated with respective ones of the N viewers, each of the N transmitters generating a unique coded pulse, a detector for determining the position of each of the N viewers relative to the viewing screen responsive to the respective unique coded pulse and for generating respective position data, a graphics processor for generating the video signal responsive to the position data, and N selectors associated with the N viewers for selecting the M image pairs out of the N.times.M image pairs allocated to each of the N viewers, respectively. The projector includes an electron-beam-pumped semiconductor laser (EBSL) screen, e.g., a vertical cavity surface emitting laser screen. In an exemplary case, the video signal carries in excess of 1000 image pairs per second, which is far beyond the capability of conventional cathode ra…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.