LED driving device and method for improving harmonic current distortion on a LED driving device
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United States of America Patent
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Jun 28, 2016
Grant Date -
Mar 10, 2016
app pub date -
Aug 17, 2015
filing date -
Sep 9, 2014
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Abstract
A LED driving device is provided. The LED driving device includes a multi-segment linear LED driver, first current-compensating device and second current-compensating device. The LED driving device is used to drive a LED device which is composed by a plurality of serial LED modules. The multi-segment linear LED driver selectively provides a first path to a first LED module of the LED modules for flowing a first constant current, or provides a second path to the first LED module and a second LED module of the LED modules for flowing a second constant current. When the first path is provided, first compensating current flows through the first current-compensating device. When the second path is provided, the first current-compensating device stops conducting the first compensating current. When the second path is provided, second compensating current flows through the second current-compensating device.
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