公开(公告)号：US07667683B2

公开(公告)日：2010-02-23

申请号：US12188202

申请日：2008-08-07

申请人： Chien-Yang Chen ,  Chi-Hsiu Lin ,  Shin-Chang Lin ,  Po-Kun Hsieh

发明人： Chien-Yang Chen ,  Chi-Hsiu Lin ,  Shin-Chang Lin ,  Po-Kun Hsieh

IPC分类号： G09G3/36

CPC分类号： H05B33/0812 ,  Y02B20/345

摘要： A light source driving circuit includes a voltage signal source and a temperature-improving current source for adjusting luminance of a series of LEDs. A first end of the series of LEDs is electrically connected to a ground end. The temperature-improving current source includes an adjustable power supply for outputting an adjustable voltage, a voltage-controlled current source for outputting currents according to the voltage signal source, and a feedback circuit electrically connected between a second end of the series of the LEDs and the adjustable power supply for controlling the output voltage of the adjustable power supply according to the voltage on the second end of the series of LEDs.

摘要翻译： 光源驱动电路包括电压信号源和用于调节一系列LED的亮度的温度改善电流源。 一系列LED的第一端电连接到地端。 温度改善电流源包括用于输出可调电压的可调节电源，用于根据电压信号源输出电流的压控电流源，以及电连接在一系列LED的第二端和 所述可调电源用于根据所述一系列LED的第二端上的电压来控制所述可调电源的输出电压。

公开(公告)号：US20090212716A1

公开(公告)日：2009-08-27

申请号：US12188202

申请日：2008-08-07

申请人： Chien-Yang Chen ,  Chi-Hsiu Lin ,  Shin-Chang Lin ,  Po-Kun Hsieh

发明人： Chien-Yang Chen ,  Chi-Hsiu Lin ,  Shin-Chang Lin ,  Po-Kun Hsieh

IPC分类号： H05B41/36

CPC分类号： H05B33/0812 ,  Y02B20/345

摘要： A light source driving circuit includes a voltage signal source and a temperature-improving current source for adjusting luminance of a series of LEDs. A first end of the series of LEDs is electrically connected to a ground end. The temperature-improving current source includes an adjustable power supply for outputting an adjustable voltage, a voltage-controlled current source for outputting currents according to the voltage signal source, and a feedback circuit electrically connected between a second end of the series of the LEDs and the adjustable power supply for controlling the output voltage of the adjustable power supply according to the voltage on the second end of the series of LEDs.

摘要翻译： 光源驱动电路包括电压信号源和用于调节一系列LED的亮度的温度改善电流源。 一系列LED的第一端电连接到地端。 温度改善电流源包括用于输出可调电压的可调节电源，用于根据电压信号源输出电流的压控电流源，以及电连接在一系列LED的第二端和 所述可调电源用于根据所述一系列LED的第二端上的电压来控制所述可调电源的输出电压。

公开(公告)号：US08115409B2

公开(公告)日：2012-02-14

申请号：US12424535

申请日：2009-04-15

申请人： Chi-Hsiu Lin ,  Shin-Chang Lin ,  Chien-Yang Chen

发明人： Chi-Hsiu Lin ,  Shin-Chang Lin ,  Chien-Yang Chen

IPC分类号： H05B37/02

CPC分类号： H05B41/2828 ,  H05B41/295

摘要： A driving circuit includes a signal generator, a resonant circuit, a control circuit and an adjusting circuit. The signal generator is utilized for generating an alternating current (AC) signal having a fixed frequency. The resonant circuit is coupled to the signal generator, and is utilized for generating an oscillation signal to drive a backlight source according to the alternating current signal. The control circuit is utilized for providing a control signal. The adjusting circuit is coupled to the control circuit, the resonant circuit and the backlight source, and is utilized for providing an impedance according to the control signal to thereby adjust a current value of the backlight source.

摘要翻译： 驱动电路包括信号发生器，谐振电路，控制电路和调整电路。 信号发生器用于产生具有固定频率的交流（AC）信号。 谐振电路耦合到信号发生器，并用于根据交流信号产生振荡信号以驱动背光源。 控制电路用于提供控制信号。 调节电路耦合到控制电路，谐振电路和背光源，并用于根据控制信号提供阻抗，从而调节背光源的电流值。

公开(公告)号：US07663599B1

公开(公告)日：2010-02-16

申请号：US12390511

申请日：2009-02-23

申请人： Chi-Hsiu Lin ,  Chien-Yang Chen ,  Shin-Chang Lin

发明人： Chi-Hsiu Lin ,  Chien-Yang Chen ,  Shin-Chang Lin

IPC分类号： G09G3/36

CPC分类号： G09G3/342 ,  G09G2320/041 ,  G09G2320/064 ,  H05B33/0818

摘要： A driving circuit for an LED backlight system is disclosed. The driving circuit includes an input voltage, an input resistor, an operational amplifier, a first transistor and a current calculation unit. The operational amplifier has a positive input terminal electrically connected to the input voltage through the input resistor, and an output terminal electrically connected to its negative input terminal thorough a feedback network. The first transistor is utilized for draining a reference current to control an output voltage of the operational amplifier according to the input voltage and the input resistor. The current calculation unit is utilized for generating a plurality of working currents proportional to the reference current to drive a plurality of LED strings according to the output voltage of the operational amplifier.

摘要翻译： 公开了一种用于LED背光系统的驱动电路。 驱动电路包括输入电压，输入电阻，运算放大器，第一晶体管和电流计算单元。 运算放大器具有通过输入电阻器电连接到输入电压的正输入端子，以及通过反馈网络电连接到其负输入端子的输出端子。 第一晶体管用于排放参考电流，以根据输入电压和输入电阻来控制运算放大器的输出电压。 当前计算单元用于产生与参考电流成比例的多个工作电流，以根据运算放大器的输出电压来驱动多个LED串。

公开(公告)号：US20090322243A1

公开(公告)日：2009-12-31

申请号：US12424535

申请日：2009-04-15

申请人： Chi-Hsiu Lin ,  Shin-Chang Lin ,  Chien-Yang Chen

发明人： Chi-Hsiu Lin ,  Shin-Chang Lin ,  Chien-Yang Chen

IPC分类号： H05B41/16

CPC分类号： H05B41/2828 ,  H05B41/295

摘要： A driving circuit includes a signal generator, a resonant circuit, a control circuit and an adjusting circuit. The signal generator is utilized for generating an alternating current (AC) signal having a fixed frequency. The resonant circuit is coupled to the signal generator, and is utilized for generating an oscillation signal to drive a backlight source according to the alternating current signal. The control circuit is utilized for providing a control signal. The adjusting circuit is coupled to the control circuit, the resonant circuit and the backlight source, and is utilized for providing an impedance according to the control signal to thereby adjust a current value of the backlight source.

摘要翻译： 驱动电路包括信号发生器，谐振电路，控制电路和调整电路。 信号发生器用于产生具有固定频率的交流（AC）信号。 谐振电路耦合到信号发生器，并用于根据交流信号产生振荡信号以驱动背光源。 控制电路用于提供控制信号。 调节电路耦合到控制电路，谐振电路和背光源，并用于根据控制信号提供阻抗，从而调节背光源的电流值。

公开(公告)号：US20120019154A1

公开(公告)日：2012-01-26

申请号：US12880161

申请日：2010-09-13

申请人： Chien-Yang Chen ,  Po-Kun Hsieh ,  Tung-Hsin Lan ,  Ming-Chang Lin

发明人： Chien-Yang Chen ,  Po-Kun Hsieh ,  Tung-Hsin Lan ,  Ming-Chang Lin

IPC分类号： H05B37/02 ,  H05B41/16

CPC分类号： H05B33/0818 ,  H05B33/0848

摘要： A power supply unit provides a voltage, and a driving current to a series of light emitting diodes. A dimming unit adjusts a duty cycle of an original dimming signal to generate a dimming signal according to the driving current and an ideal current. A current sink coupled to the series of light emitting diodes adjusts a duty cycle of the driving current according to the dimming signal.

摘要翻译： 电源单元向一系列发光二极管提供电压和驱动电流。 调光单元调节原始调光信号的占空比，根据驱动电流和理想电流产生调光信号。 耦合到一系列发光二极管的电流吸收器根据调光信号来调节驱动电流的占空比。

公开(公告)号：US20120019155A1

公开(公告)日：2012-01-26

申请号：US12880172

申请日：2010-09-13

申请人： Chien-Yang Chen ,  Po-Kun Hsieh ,  Tung-Hsin Lan ,  Ming-Chang Lin

发明人： Chien-Yang Chen ,  Po-Kun Hsieh ,  Tung-Hsin Lan ,  Ming-Chang Lin

IPC分类号： H05B37/02

CPC分类号： H05B33/0818 ,  H05B33/0848

摘要： A power supply unit provides a voltage, and a driving current to a series of light emitting diodes. A dimming unit adjusts a duty cycle of an original dimming signal to generate a dimming signal according to the driving current and an ideal current. A current sink coupled to the series of light emitting diodes adjusts a duty cycle of the driving current according to the dimming signal.

摘要翻译： 电源单元向一系列发光二极管提供电压和驱动电流。 调光单元调整原始调光信号的占空比，根据驱动电流和理想电流产生调光信号。 耦合到一系列发光二极管的电流吸收器根据调光信号来调节驱动电流的占空比。

公开(公告)号：US08217584B2

公开(公告)日：2012-07-10

申请号：US12880161

申请日：2010-09-13

申请人： Chien-Yang Chen ,  Po-Kun Hsieh ,  Tung-Hsin Lan ,  Ming-Chang Lin

发明人： Chien-Yang Chen ,  Po-Kun Hsieh ,  Tung-Hsin Lan ,  Ming-Chang Lin

IPC分类号： H05B41/16

CPC分类号： H05B33/0818 ,  H05B33/0848

摘要： A power supply unit provides a voltage, and a driving current to a series of light emitting diodes. A dimming unit adjusts a duty cycle of an original dimming signal to generate a dimming signal according to the driving current and an ideal current. A current sink coupled to the series of light emitting diodes adjusts a duty cycle of the driving current according to the dimming signal.

摘要翻译： 电源单元向一系列发光二极管提供电压和驱动电流。 调光单元调整原始调光信号的占空比，根据驱动电流和理想电流产生调光信号。 耦合到一系列发光二极管的电流吸收器根据调光信号来调节驱动电流的占空比。

公开(公告)号：US08203279B2

公开(公告)日：2012-06-19

申请号：US12880172

申请日：2010-09-13

申请人： Chien-Yang Chen ,  Po-Kun Hsieh ,  Tung-Hsin Lan ,  Ming-Chang Lin

发明人： Chien-Yang Chen ,  Po-Kun Hsieh ,  Tung-Hsin Lan ,  Ming-Chang Lin

IPC分类号： H05B41/16

CPC分类号： H05B33/0818 ,  H05B33/0848

摘要： A power supply unit provides a voltage, and a driving current to a series of light emitting diodes. A dimming unit adjusts a duty cycle of an original dimming signal to generate a dimming signal according to the driving current and an ideal current. A current sink coupled to the series of light emitting diodes adjusts a duty cycle of the driving current according to the dimming signal.

摘要翻译： 电源单元向一系列发光二极管提供电压和驱动电流。 调光单元调整原始调光信号的占空比，根据驱动电流和理想电流产生调光信号。 耦合到一系列发光二极管的电流吸收器根据调光信号来调节驱动电流的占空比。

公开(公告)号：US20100283411A1

公开(公告)日：2010-11-11

申请号：US12534858

申请日：2009-08-04

申请人： Chien-Yang Chen ,  Chi-Hsiu Lin

发明人： Chien-Yang Chen ,  Chi-Hsiu Lin

IPC分类号： H05B41/36

CPC分类号： H05B33/0812 ,  Y02B20/343

摘要： A light emitting diode (LED) driving device and an LED driving method thereof are provided. The LED driving device includes a voltage generator, a circuit and a compensation circuit. The voltage generator is used to provide a positive voltage and a negative voltage, and the circuit is coupled to the positive voltage and the negative voltage. Herein, the circuit includes a load and an LED which are coupled to each other in series. The compensation circuit is used to sense voltages of two ends of the load, so as to generate a compensation signal and adjust the positive voltage and the negative voltage through the compensation signal. Therefore, voltage stress of the LED driving device is reduced by using the provided positive voltage and the provided negative voltage.

摘要翻译： 提供了一种发光二极管（LED）驱动装置及其LED驱动方法。 LED驱动装置包括电压发生器，电路和补偿电路。 电压发生器用于提供正电压和负电压，并且电路耦合到正电压和负电压。 这里，电路包括串联耦合的负载和LED。 补偿电路用于检测负载两端的电压，以产生补偿信号，并通过补偿信号调节正电压和负电压。 因此，通过使用所提供的正电压和所提供的负电压来降低LED驱动装置的电压应力。