LED DEVICE, LED DRIVING CIRCUIT AND METHOD
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    发明申请
    LED DEVICE, LED DRIVING CIRCUIT AND METHOD 有权
    LED装置,LED驱动电路及方法

    公开(公告)号:US20130049612A1

    公开(公告)日:2013-02-28

    申请号:US13293860

    申请日:2011-11-10

    IPC分类号: H05B37/02

    摘要: A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.

    摘要翻译: 发光二极管(LED)驱动电路包括LED控制电路和功率级电路。 LED控制电路在频域中将输入脉宽调制(PWM)信号向较高频率方向移位,以产生具有与输入PWM信号的占空比基本相同的占空比的输出PWM信号。 功率级电路根据输出PWM信号输出LED驱动电流。