Patent · US Expired

Projection system and method comprising a fluorescence projection screen and a radiation source which can emit in the non-visible spectrum

US7057811B2 · kind B2 · utility

7Cited by

5References

19Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Juergen Bruegl · Munich, DE
Michael Heimrath · Fürstenfeldbruck, DE
Sonja Hauser · Friedberg, DE

Key dates

Filing date	Dec 20, 2004
Grant date	Jun 6, 2006
Priority date	—
Expiry date	Dec 20, 2024

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2323/033
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A projection system and method are provided, the system includes a radiation source for generating electromagnetic radiation outside the visible wavelength range, an imaging unit, which can be irradiated by the radiation source, and a projection screen having a radiation-sensitive surface which, when excited by means of the above-mentioned invisible radiation, can emit fluorescent light in the visible wavelength range. The radiation-sensitive surface is formed of a material which, irrespective of the position, emits fluorescent light of different wavelengths as a function of the wavelength of the excitation radiation, and the radiation source can emit excitation radiation of different wavelengths.

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