Fresnel lens for use with rear projection display
US6804055B2 · kind B2 · utility
34Cited by
52References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2003 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Aug 12, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The ultra-thin rear projection display device described herein includes a wide angle lens system and one or more planar mirrors that are parallel to a screen on which an image is to be displayed. In one embodiment, the screen that has multiple groove angles to provide better illumination than screens with a single groove angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.