Rear projection screen and rear projection system provided with such a screen
US4762393A · kind A · utility
29Cited by
10References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1987 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Apr 9, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/625
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The vertical viewing angle of a rear projection screen having a large horizontal viewing angle and good color correction due to the special shape of the light dispersing elements provided on the front side of the plate is increased by elements provided on the rear side and extending in a direction perpendicular to the front side elements. The latter are preferably total internal reflection elements, while the former are not. A bulk diffusor may be largely or completely dispensed with.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.