Patent · US Active

Projection display having kohler illumination of projection lenses

US8777424B2 · kind B2 · utility

8Cited by

10References

16Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Peter Schreiber · Jena, DE
Marcel Sieler · Munich, DE
Erik Foerster · Jena, DE

Key dates

Filing date	Jun 11, 2010
Grant date	Jul 15, 2014
Priority date	—
Expiry date	Jun 3, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04N9/3147
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A projection display having at least one light source and also regularly-disposed optical channels. The optical channels comprise at least one field lens, to which respectively one object structure to be imaged and also at least one projection lens are assigned. The distance of the projection lenses from the assigned object structures corresponds to the focal distance of the projection lenses while the distance of the object structures to be imaged from the assigned field lens is chosen such that a Köhler illumination of the assigned projection lens is made possible. Then the individual projections are superimposed to form the total image.

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