Transmission type projection screen
US4752116A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1987 |
| Grant date | Jun 21, 1988 |
| Priority date | — |
| Expiry date | Jul 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/625
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A screen formed with a plurality of lenticular lenses on both the surfaces is provided. There are formed on the incident surface a plurality of sets of incident side main lenticular lenses and incident side auxiliary lenticular lenses, each set being arranged on both the sides of the main lenticular lens. Further, there are formed on the emission surface a plurality of emission side main lenticular lenses and a plurality of pairs of emission side auxiliary lenticular lenses, each pair being arranged on both the sides of the main lenticular lens. The greater part of an incident light is incident from the incident side main lenticular lens and is emitted from the emission side main lenticular lens at a predetermined diffusion angle. The remaining incident light is incident from the incident side auxiliary lenticular lenses and is emitted from the emission side auxiliary lenticular lenses at a different angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.