Stereoscopic three dimensional large screen liquid crystal display
US4647966A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Nov 22, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/243
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A three dimensional large screen liquid crystal projection display utilizes wo liquid crystal light valves in tandem to produce polarization-type stereoscopic images in a large screen display format. Each light valve, driven separately by video input derived either from live scenes or computer generated data, presents one view of a stereoscopic image pair. Using one projection lamp, one projection lens, and a polarizing beamsplitter cube, the two images are optically combined and projected simultaneously onto a non-depolarizing screen. The particular optical geometry used results in orthogonal linear polarizations for the two images, so they can be viewed stereoscopically using polaroid glasses with appropriately oriented polarizing axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.