Driving circuit capable of enhancing energy conversion efficiency and driving method thereof
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United States of America Patent
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Aug 27, 2013
Grant Date -
Aug 2, 2012
app pub date -
Apr 28, 2011
filing date -
Jan 28, 2011
priority date (Note) -
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Abstract
A driving circuit includes a switch, a detecting unit, a current supply unit, and an energy storage unit. The current supply unit is used for providing a driving current for at least one series of light emitting diodes. The detecting unit is used for comparing a voltage of a first terminal of the detecting unit with a reference voltage to generate a switch control signal. When the switch is turned on according the switch control signal, a first voltage drives the series of light emitting diodes through the switch and the energy storage unit is charged according a charge current. When the switch is turned off according the switch control signal, the energy storage unit drives the series of light emitting diodes according to a discharge current.
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