AC LED apparatus
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United States of America Patent
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Aug 27, 2013
Grant Date -
Nov 3, 2011
app pub date -
Jan 6, 2011
filing date -
May 3, 2010
priority date (Note) -
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Abstract
An alternating-current (AC) light-emitting diode (LED) apparatus is disclosed. A rectifier rectifies a power AC voltage to generate a rectified voltage, which is monitored by a controller. A number of LEDs are electrically coupled between the rectified voltage and a ground. A number of switches correspondingly control at least a portion of the LEDs respectively, wherein one terminal of each switch is electrically coupled to one electrode of the corresponding LED or LEDs. The switches are controlled by the controller according to the rectified voltage.
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