LICHTQUELLE MIT KONSTANTER LEISTUNG MIT ELEKTRONISCH GEFILTERTER OPTISCHER RÜCKKOPPLUNG

LICHTQUELLE MIT KONSTANTER LEISTUNG MIT ELEKTRONISCH GEFILTERTER OPTISCHER RÜCKKOPPLUNG

A solid state traffic light apparatus provided with an optical feedback sensor ensuring a constant light intensity by detecting back-scattered light from a diffuser centered above an LED array. Control logic individually drives the LEDs, the drive characteristics being changed over time by the optic...

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Bibliographische Detailangaben
Hauptverfasser: OVENS, KEVIN, SHINHAM, TOM, HUTCHISON, MICHAEL, C
Format: Patent
Sprache:ger
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Beschreibung
Zusammenfassung:A solid state traffic light apparatus provided with an optical feedback sensor ensuring a constant light intensity by detecting back-scattered light from a diffuser centered above an LED array. Control logic individually drives the LEDs, the drive characteristics being changed over time by the optical feedback to ensure a uniform beam intensity is generated at a intensity meeting DOT standards, across the life of the device, and as a function of ambient light conditions.