Patent · US Expired

Light source having a luminescent layer

US6307604A · kind A · utility

19Cited by

9References

6Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Rifat A. M. Hikmet · Eindhoven, NL
Ralf Raue · Aachen, DE
Thomas Welker · Monschau, DE

Key dates

Filing date	Feb 2, 1995
Grant date	Oct 23, 2001
Priority date	—
Expiry date	Feb 2, 2015

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/13362
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Light source having a luminescent layer (3,8) whose light is guided through an optical filter (5,9) comprising at least one cholesteric crystal layer (cholesteric filter).

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