Beaded rear projection screen with tunable gain
US6567215B2 · kind B2 · utility
12Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2001 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Sep 4, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/625
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a beaded rear projection screen that has performance properties such as gain and viewing angle that can be tuned by using a mixture of two or more types of microbeads having different refractive indices and varying the mixture. The present invention further provides methods of selecting microbeads and the construction of the screen so that transmission through the screen can remain sufficiently high throughout the range of tunability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.