Projection screen and projection system using the same
US9280040B2 · kind B2 · utility
0Cited by
13References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 11, 2014 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | Sep 11, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B35/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection screen includes a reflector and a plurality of compound lenses. The compound lenses are arranged at the same side of the reflector in an array manner. Each of the compound lenses has a first lens portion and a second lens portion. The first lens portion is disposed between the second lens portion and the reflector. A surface of the first lens portion opposite to the reflector has a first radius of curvature, and a surface of the second lens portion opposite to the reflector has a second radius of curvature. The first radius of curvature has a length greater than the second radius of curvature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.