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    • 2. 发明申请
    • CIRCUIT AND METHOD FOR CONTROLLING LIGHT EMITTING DIODE
    • 用于控制发光二极管的电路和方法
    • US20140001968A1
    • 2014-01-02
    • US13596332
    • 2012-08-28
    • Jianbo SUN
    • Jianbo SUN
    • H05B37/02
    • H05B33/0845
    • A method for controlling a current flowing through one or more light emitting diodes (LEDs) comprising receiving a Pulse Width Modulation (PWM) control signal, which includes rising and falling edges; receiving a first voltage signal; generating a second voltage signal based on the PWM control signal and the first voltage signal, wherein the second voltage increases gradually in response to one of the rising and falling edges of the PWM signal and decreases gradually in response to the other of the rising and falling edges of the PWM signal; and providing a current to the one or more LEDs, wherein the current varies gradually according to the second voltage.
    • 一种用于控制流过一个或多个发光二极管(LED)的电流的方法,包括接收包括上升沿和下降沿的脉宽调制(PWM)控制信号; 接收第一电压信号; 基于PWM控制信号和第一电压信号产生第二电压信号,其中第二电压响应于PWM信号的上升沿和下降沿之一逐渐增加,并且响应于另一个上升和下降而逐渐减小 PWM信号的边沿; 以及向所述一个或多个LED提供电流,其中所述电流根据所述第二电压逐渐变化。