Patent · US Active

Lamp for a headlight of a motor vehicle

US8602616B2 · kind B2 · utility

0Cited by

3References

14Claims

0Family size

Assignee

KONINIKLIJKE PHILIPS N.V. · NL

Inventors

Bernd Schoenfelder · Eindhoven, NL
Manfred Westemeyer · Aldenhoven, DE
Klaus Schoeller · Aachen, DE
Kirsten G. Baeumges · Viersen, DE
Manfred Ruske · Ludwigshafen, DE
Konrad Sell · Aachen, DE

Key dates

Filing date	Nov 9, 2009
Grant date	Dec 10, 2013
Priority date	—
Expiry date	Jun 30, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

It is provided a lamp, particularly halogen lamp, for a headlight of a motor vehicle, comprising a light source (12) for emitting mainly white light, a mainly transparent envelope (14) encapsulating the light source (12) and a filter element (22) provided at the envelope (14), wherein the filter element (22) is adapted for deflecting visible light of a predefined wavelength interval such, that mainly blue light can be provided above a bright/dark-cutoff (28). Since the deflected bluish light is above the bright/dark-cutoff (28) an oncoming driver recognizes earlier the light. At the same time the oncoming driver is not blinded by the blue light above the bright/dark-cutoff (28), since not the whole emitted light (40) but only a smaller wavelength interval is directed above the bright/dark-cutoff (28).

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