LED DRIVING DEVICE AND METHOD THEREOF
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United States of America Patent
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Issued Date -
Jun 6, 2013
app pub date -
Dec 30, 2011
filing date -
Dec 2, 2011
priority date (Note) -
Abandoned
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Abstract
An LED driving device and its method are suitable for driving and regulating an illumination brightness of at least one LED. After switching the phase angle of an alternating voltage through a regulation circuit, an integration circuit and a filter circuit are utilized to generate a stable constant voltage. Next, the magnitude of the constant voltage is regulated in stage through a driving circuit based upon a control signal of a control circuit, and the voltage is converted into a constant current for driving the LED. Accordingly, the invention utilizes the constant current with stage variation to achieve the effect of linear dimming to prevent flickering.
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