Projection screen unit with projection surfaces optimized for different ambient light levels
US7042640B2 · kind B2 · utility
5Cited by
9References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2004 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Jun 8, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection screen unit includes a first projection surface optimized for a predetermined range of ambient conditions and a second projection surface optimized for a second, different range of ambient conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.