Screen for rear projection display
US6970289B1 · kind B1 · utility
6Cited by
14References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2000 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Aug 23, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/625
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A rear projection screen for use with a projection lens which has an exit pupil (23) is provided. The screen has a light entering side and a light exiting side and comprises in order from said light entering side to said light exiting side: (a) a Fresnel structure (11); (b) a lenslet array (13); and (c) an opaque layer (15) comprising a plurality of pinholes, said pinholes being at locations which correspond to the images of the exit pupil formed by the combination of the Fresnel structure and the lenslet array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.