DRIVING A MULTI-COLOR LUMINAIRE

DRIVING A MULTI-COLOR LUMINAIRE

Embodiments are disclosed for driving a multi-color solid state light source luminaire so as to maintain a color point as temperature varies within a given range. An array of solid state light sources includes two or more strings and is driven by a single constant current source. The array is topolo...

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1. Verfasser: DENVIR KERRY J
Format: Patent
Sprache:eng
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ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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creator DENVIR KERRY J
description Embodiments are disclosed for driving a multi-color solid state light source luminaire so as to maintain a color point as temperature varies within a given range. An array of solid state light sources includes two or more strings and is driven by a single constant current source. The array is topologically arranged to allow for control of the division of current between the strings of solid state light sources. In one such current-sharing scenario, the duty cycle of a switching control signal corresponds directly to the proportion of current that flows in one of two distinct strings of solid state light sources. Thermal feedback is used to control the duty cycle. In this way, the amount of current that flows in both strings may be adjusted as temperature changes.
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subjects ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
title DRIVING A MULTI-COLOR LUMINAIRE
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