CONTROLLING CIRCUIT FOR AN LED DRIVER AND CONTROLLING METHOD THEREOF
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United States of America Patent
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Issued Date -
Jan 3, 2013
app pub date -
Jan 6, 2012
filing date -
Jan 10, 2011
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a high efficiency light-emitting diode (LED) driver that can include a controller, an LED apparatus, an LED current sensing circuit, and a power switch. The LED current sensing circuit may be used to generate a feedback signal indicative of LED current. The controller may be coupled to the LED current sensing circuit to receive the feedback signal and generate a driving signal. The power switch may be used to operate in periodic on and off conditions to drive the LED apparatus and maintain a driving current of the LED apparatus that is substantially constant.
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