Invention Grant
US09572217B2 Light emitting diode driver and method of controlling thereof having a dimmed input sense circuit 有权
发光二极管驱动器及其控制方法具有调光输入检测电路

Light emitting diode driver and method of controlling thereof having a dimmed input sense circuit
Abstract:
Devices, systems, software, and methods for control of light emitting diodes (LEDs) via an LED driver circuit that receives a dimmed AC input signal from a dimmer and generates an output signal to power and dim an LED element. The LED driver circuit comprises a dimmed input sense circuit, a microcontroller, and a power supply circuit. The power supply circuit generates a power supply from the dimmed AC input signal for powering the LED driver circuit. The dimmed input sense circuit detects an incoming duty cycle (Din) of the dimmed AC input signal. The microcontroller stores one or more dimming level parameters, receives the detected incoming duty cycle (Din) from the dimmed input sense circuit, and generates an output duty cycle (Dout) based on the detected incoming duty cycle (Din) and the one or more dimming level parameters. The LED driver circuit generates the output signal using the generated output duty cycle (Dout) for powering the LED element at a generated dimming level.
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