Fresnel lens having reduced distortions
US7259912B2 · kind B2 · utility
5Cited by
86References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2004 |
| Grant date | Aug 21, 2007 |
| Priority date | — |
| Expiry date | Jan 21, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display device for displaying images in a rear projection display device is provided. The display device may include, amongst other structure, a screen including a lens portion and a frame portion. A tensioner may be operatively associated with the screen and may be adapted to adjust the frame portion to maintain a predetermined tautness in the lens portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.