ROAD SIGNS AND MARKINGS WITH LIGHT CONVERSION

A sign or other marking that is illuminated by an LED lamp, e.g., in a vehicle headlamp is described. The sign employs spectral shifting to increase the power or energy reflected by the sign when illuminated by the LED lamp, which has a significant power peak in the blue spectrum. The spectral shift...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: O'HARA, John, MITCHELL, J. R. Scott
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A sign or other marking that is illuminated by an LED lamp, e.g., in a vehicle headlamp is described. The sign employs spectral shifting to increase the power or energy reflected by the sign when illuminated by the LED lamp, which has a significant power peak in the blue spectrum. The spectral shifting can be done in a conversion layer on top of a reflective layer. The reflective layer can include quantum dots to increase its efficiency in reflecting light.