Patent · US Expired

Pigment coated lamp and luminaire emitting colored light

US6520664B1 · kind B1 · utility

1Cited by

3References

16Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Thomas Amrein · Aachen, DE
Joachim Opitz · Aachen, DE
Stefan Willi Julius Gruhlke · Baesweiler, DE

Key dates

Filing date	Aug 14, 2000
Grant date	Feb 18, 2003
Priority date	—
Expiry date	Aug 14, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH01K1/32
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A colored luminaire, in particular a colored signaling light for automobiles, fitted with a lamp and a luminaire cover in which the lamp has a bulb with a coating of a first layer comprising a pigment, which pigment is chosen from the group of perylene pigments, perinone pigments, isoindoline pigments, and thioindigo pigments, is remarkable for a long useful life. It is not attacked by UV radiation, moisture, and spraying salt and is resistant to temperatures of between 250 and 350° C. Colored luminaires with bulb coatings comprising these pigments alone or in combination with further pigments for color correction comply with the color standards for automobile luminaires.

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