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    • 6. 发明授权
    • PWM controlling circuit and LED driver circuit having the same
    • PWM控制电路和LED驱动电路具有相同的功能
    • US08643289B2
    • 2014-02-04
    • US13397936
    • 2012-02-16
    • Beom-seon RyuChang-sik LimJin-wook Kim
    • Beom-seon RyuChang-sik LimJin-wook Kim
    • H05B37/02
    • H05B33/0827H05B33/0815H05B33/0851Y02B20/346
    • A Pulse Width Modulation (PWM) controlling circuit and a Light Emitting Diode (LED) driver circuit having the same are provided. An LED driver circuit includes a voltage detector connected to a plurality of LED arrays, the voltage detector being configured to determine a connection status of each of the LED arrays according to a corresponding level of the feedback voltage, and detect a minimum feedback voltage from feedback voltages of the LED arrays that are determined to be connected, a controller configured to output a control signal to one of abort and control boosting of the LED arrays according to the detected minimum feedback voltage, and a Pulse Width Modulation (PWM) signal generator configured to output a PWM signal corresponding to the outputted control signal according to an on/off state of a dimming signal that drives the LED arrays that are determined to be connected.
    • 提供了具有该脉宽调制(PWM)控制电路和发光二极管(LED)驱动电路的脉宽调制(PWM)控制电路。 LED驱动器电路包括连接到多个LED阵列的电压检测器,电压检测器被配置为根据反馈电压的相应电平来确定每个LED阵列的连接状态,并且从反馈检测最小反馈电压 确定要连接的LED阵列的电压,被配置为根据检测到的最小反馈电压将控制信号输出到LED阵列的中止和控制升压之一的控制器以及被配置为的脉冲宽度调制(PWM)信号发生器 根据驱动被确定为连接的LED阵列的调光信号的开/关状态来输出与输出的控制信号对应的PWM信号。
    • 8. 发明申请
    • PWM CONTROLLING CIRCUIT AND LED DRIVER CIRCUIT HAVING THE SAME
    • PWM控制电路和具有该控制电路的LED驱动电路
    • US20120212142A1
    • 2012-08-23
    • US13397936
    • 2012-02-16
    • Beom-seon RyuChang-sik LimJin-wook Kim
    • Beom-seon RyuChang-sik LimJin-wook Kim
    • H05B37/02
    • H05B33/0827H05B33/0815H05B33/0851Y02B20/346
    • A Pulse Width Modulation (PWM) controlling circuit and a Light Emitting Diode (LED) driver circuit having the same are provided. An LED driver circuit includes a voltage detector connected to a plurality of LED arrays, the voltage detector being configured to determine a connection status of each of the LED arrays according to a corresponding level of the feedback voltage, and detect a minimum feedback voltage from feedback voltages of the LED arrays that are determined to be connected, a controller configured to output a control signal to one of abort and control boosting of the LED arrays according to the detected minimum feedback voltage, and a Pulse Width Modulation (PWM) signal generator configured to output a PWM signal corresponding to the outputted control signal according to an on/off state of a dimming signal that drives the LED arrays that are determined to be connected.
    • 提供了具有该脉宽调制(PWM)控制电路和发光二极管(LED)驱动电路的脉宽调制(PWM)控制电路。 LED驱动器电路包括连接到多个LED阵列的电压检测器,电压检测器被配置为根据反馈电压的相应电平来确定每个LED阵列的连接状态,并且从反馈检测最小反馈电压 确定要连接的LED阵列的电压,被配置为根据检测到的最小反馈电压将控制信号输出到LED阵列的中止和控制升压之一的控制器以及被配置为的脉冲宽度调制(PWM)信号发生器 根据驱动被确定为连接的LED阵列的调光信号的开/关状态输出与输出的控制信号对应的PWM信号。