Apparatus, method and system for providing AC line power to lighting devices
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United States of America Patent
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Nov 14, 2017
Grant Date -
Feb 2, 2017
app pub date -
Aug 3, 2016
filing date -
Jun 4, 2009
priority date (Note) -
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Abstract
An apparatus, method and system are disclosed for providing AC line power to lighting devices such as light emitting diodes (“LEDs”). A representative apparatus comprises: a plurality of LEDs coupled in series to form a plurality of segments of LEDs; first and second current regulators; a current sensor; and a controller to monitor a current level through a series LED current path, and to provide for first or second segments of LEDs to be in or out of the series LED current path at different current levels. A voltage regulator is also utilized to provide a voltage during a zero-crossing interval of the AC voltage. In a representative embodiment, first and second segments of LEDs are both in the series LED current path regulated at a lower current level compared to when only the first segment of LEDs is in the series LED current path.
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