Patent · US Expired

Stable rear projection screen and method for the production thereof

US7602550B2 · kind B2 · utility

0Cited by

6References

27Claims

0Family size

Assignee

ROEHM GMBH & CO. KG · DE

Inventors

Markus Parusel · Messel, DE
Jann Schmidt · Darmstadt, DE
Herbert Groothues · Frankfurt, DE

Key dates

Filing date	Mar 12, 2004
Grant date	Oct 13, 2009
Priority date	—
Expiry date	Jul 11, 2025

Classification

Technology area (CPC G)Physics
CPC primaryG02B5/0278
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The present invention relates to rear-projection screens which have at least one scattering layer encompassing scattering particles and has at least one backing layer, characterized in that the halved-intensity angle of the scattering layer is greater than or equal to 15° and the halved-intensity angle of the backing layer is smaller than or equal to 6.5°, where the gloss R60° of the backing layer is smaller than or equal to 70.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.