发明申请
US20120153833A1 Controlling Current Flowing Through LEDs in a LED Lighting Fixture 有权
控制在LED照明灯具中流过LED的电流

Controlling Current Flowing Through LEDs in a LED Lighting Fixture
摘要:
An alternating current (“AC”)-powered light emitting diode (“LED”) driver is described herein for driving one or more arrays of series-connected LEDs. The LED driver includes a first transistor that includes a collector-emitter path connected in series with at least one LED of an array of series-connected LEDs. The LED driver also includes a second transistor configured to selectively activate the first transistor based on a level of current through the array of series-connected LEDs. The array of series-connected LEDs has a turn-on voltage.
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