Projection screen for rear projection television set
US5844715A · kind A · utility
23Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1996 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Jul 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/72
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection screen for a rear projection television set includes a Fresnel lens for focusing incident image light so as to center on an optical axis of the projection screen, and an optical diffusion member including a lenticular lens portion for diffusing the image light received from the Fresnel lens, wherein the external surface of the optical diffusion member is made of glass. The projection screen provides a wider angle of view compared with the Fresnel lens made of acryl and is resistant to scratching or breakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.