Display screen for use in front projectors
US7974005B2 · kind B2 · utility
8Cited by
6References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2007 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Nov 3, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A screen for use in image presentations comprises an array of transmissive elongated prisms. The screen is capable of delivering incident light, having an incident angle within a specific incident angle range, to the viewing area, while preventing ambient light, having an incident angle within another angle range, from being directed to the viewing area. According to one embodiment, in operation, the screen, an image source, and the viewing area are positioned such that the light from the image source is directed to the viewing area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.