Transmission-type screen, projection-type display device, and image displaying method
US8274736B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2008 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | May 20, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/62
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A transmission-type screen includes an entering-side Fresnel lens that inflects image light from a light emitter toward a display side using a prism formed on a rear-surface side, which is a light-entering-surface side of the image light; a first light diffusing unit that is provided on the display side with respect to the entering-side Fresnel lens and diffuses the image light from the entering-side Fresnel lens; a second light diffusing unit provided on the display side with respect to the first light diffusing unit, diffuses the image light from the first light diffusing unit, causes the diffused image light to exit toward the display side, and configured to change a relative position thereof to the first light diffusing unit; and a second substrate that holds the second light diffusing unit while being provided on the display side with respect to the second light diffusing unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.