CONTROL METHOD AND APPARATUS FOR EXTENDING RUNTIME ON A PORTABLE LIGHTING DEVICE

CONTROL METHOD AND APPARATUS FOR EXTENDING RUNTIME ON A PORTABLE LIGHTING DEVICE

A lighting apparatus is provided including a lighting unit arranged to emit light; a switching device disposed between a power source and the lighting unit; and a controller configured to set a drive signal based on a target luminance level of the lighting unit and control a switching operation of t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SCHAUB, Michael J, SCHWARZ, Daniel L, YOUNG, Crystal G
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Beschreibung
Zusammenfassung:A lighting apparatus is provided including a lighting unit arranged to emit light; a switching device disposed between a power source and the lighting unit; and a controller configured to set a drive signal based on a target luminance level of the lighting unit and control a switching operation of the switching device via a drive signal to regulate a supply of electric power from the power source to the lighting unit. The controller monitors a voltage of the power source and periodically adjusts the drive signal based on the voltage of the power source.