Projection screen for large screen pictorial display
US5625489A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1996 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Jan 24, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/604
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A front projection screen for pictorially displaying upon a front face of the screen an image projected onto the front face from a projector comprises a backing member having a front reflective surface and a polarization rotation plate overlaying the reflective surface for rotating the plane of polarization of light reflected from the surface. A sheet of lenticular lenses overlays the polarization rotation plate and a polarizing film overlays the lenticular lens sheet. The polarizing film has non-polarizing segments at a focal point of each of the lenticular lenses so that light from the projector is not attenuated by the film while light from other sources is attenuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.