Large-screen visualization device
US4365869A · kind A · utility
30Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1980 |
| Grant date | Dec 28, 1982 |
| Priority date | — |
| Expiry date | Feb 11, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133616
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for visualizing an image on a large screen with a small projection distance, in which the image is formed by pieces on an assembly of liquid crystal cells for then projecting it onto a visualization screen by means of an assembly of lenses associated with the liquid crystal cells; to illuminate the cells a transparent plate is used forming a light-guide and which comprises an assembly of networks associated with the cells to extract the light from the plate and project it onto the cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.