Front projection screens including reflecting and refractive layers of differing spatial frequencies
US7324276B2 · kind B2 · utility
12Cited by
29References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 2005 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Jun 7, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/0083
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Projection screens include a substrate, a reflective layer on the substrate and a refractive layer on the substrate. The reflective layer includes reflective microstructures of about 5 μm to about 500 μm in size, and arranged in a first pattern to reflect light at a first spatial frequency. The refractive layer includes refractive microstructures of about 5 μm to about 500 μm in size, and arranged in a second pattern that is different from the first pattern, to refract light at a second spatial frequency that is different than the first spatial frequency. Related fabrication methods also are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.