Patent · US Expired

Projection device

US6580469B1 · kind B1 · utility

12Cited by

18References

23Claims

0Family size

Assignee

Carl Zeiss Jena GmbH · DE

Inventors

Gerd Rieche · Jena, DE
Dietrich Schmidt · Camp Hill, US
Juergen Pudenz · Shipka, BG
Hans-Juergen Meissner · Jena, DE
Hans-Joachim Stoehr · Jena, DE
Eberhard Piehler · Jena, DE
Rainer Schnell · Jena, DE

Key dates

Filing date	Dec 28, 1999
Grant date	Jun 17, 2003
Priority date	—
Expiry date	Dec 28, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH04N5/7416
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

In a projection device with a matrix (50) located in an image plane for generating a video image, with optics (9) for projection of this video image on a screen and with a light source (3, 30) for illuminating the matrix (50), there is an arrangement by which the video image can be uniformly illuminated.

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