Rear projection image display device
US5675435A · kind A · utility
20Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1996 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Mar 14, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/625
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A rear-projection image display device comprising a light source, a display element for visual images, a projection lens and a screen for viewing visual images projected on the screen from the rear, wherein the ratio d/a between the diameter d of the exit pupil of the projection lens and the projection distance a is 0.06 or less, said screen whereon visual images are displayed includes at least two diffusion elements, and light-diffusing fine particles are dispersed in one of the two diffusion elements which is closest to the viewer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.