Driving circuit for LCD backlight lamps
    1.
    发明申请
    Driving circuit for LCD backlight lamps 失效
    LCD背光灯驱动电路

    公开(公告)号:US20060145634A1

    公开(公告)日:2006-07-06

    申请号:US11321474

    申请日:2005-12-29

    IPC分类号: H05B37/02 H05B41/36

    CPC分类号: H05B41/2855 Y02B20/186

    摘要: An LCD backlight driving circuit is provided for providing protection to LCD backlight lamps. In a preferred embodiment, the driving circuit for LCD backlight lamps comprises: a PWM controller sending control signals; two transistors receiving the control signals and sending two low-voltage pulse signals; an inverter converting the two low-voltage pulse signals to a high-voltage AC (Alternating Current) power; two lamps; two overvoltage protection circuits connected to the two lamps respectively; a voltage feedback module connected to the two lamps, a current feedback module connected to one of the two lamps; and a double-bridge circuit connected between the two lamps, and connected to the current feedback module for controlling the PWM controller to turn-on or turn-off. The driving circuit is capable of providing defective connection protection and open-circuit protection to LCD backlight lamps, and proportionately adjusting current flowing through the lamps.

    摘要翻译: 提供LCD背光驱动电路,为LCD背光灯提供保护。 在优选实施例中,LCD背光灯的驱动电路包括:发送控制信号的PWM控制器; 两个晶体管接收控制信号并发送两个低电压脉冲信号; 将两个低压脉冲信号转换成高压AC(交流)功率的逆变器; 两盏灯 两个过电压保护电路分别连接到两个灯; 连接到两个灯的电压反馈模块,连接到两个灯之一的电流反馈模块; 和连接在两个灯之间的双桥电路,并连接到电流反馈模块,用于控制PWM控制器的导通或关断。 驱动电路能够为LCD背光灯提供有缺陷的连接保护和开路保护,并且成比例地调整流过灯的电流。

    Driving circuit for LCD backlight lamps
    2.
    发明授权
    Driving circuit for LCD backlight lamps 失效
    LCD背光灯驱动电路

    公开(公告)号:US07285924B2

    公开(公告)日:2007-10-23

    申请号:US11321474

    申请日:2005-12-29

    IPC分类号: G05F1/00

    CPC分类号: H05B41/2855 Y02B20/186

    摘要: An LCD backlight driving circuit is provided for providing protection to LCD backlight lamps. In a preferred embodiment, the driving circuit for LCD backlight lamps comprises: a PWM controller sending control signals; two transistors receiving the control signals and sending two low-voltage pulse signals; an inverter converting the two low-voltage pulse signals to a high-voltage AC (Alternating Current) power; two lamps; two overvoltage protection circuits connected to the two lamps respectively; a voltage feedback module connected to the two lamps, a current feedback module connected to one of the two lamps; and a double-bridge circuit connected between the two lamps, and connected to the current feedback module for controlling the PWM controller to turn-on or turn-off. The driving circuit is capable of providing defective connection protection and open-circuit protection to LCD backlight lamps, and proportionately adjusting current flowing through the lamps.

    摘要翻译: 提供LCD背光驱动电路,为LCD背光灯提供保护。 在优选实施例中,LCD背光灯的驱动电路包括:发送控制信号的PWM控制器; 两个晶体管接收控制信号并发送两个低电压脉冲信号; 将两个低压脉冲信号转换成高压AC(交流)功率的逆变器; 两盏灯 两个过电压保护电路分别连接到两个灯; 连接到两个灯的电压反馈模块,连接到两个灯之一的电流反馈模块; 和连接在两个灯之间的双桥电路,并连接到电流反馈模块,用于控制PWM控制器的导通或关断。 驱动电路能够为LCD背光灯提供有缺陷的连接保护和开路保护,并且成比例地调整流过灯的电流。

    Power supply control circuit having controllable switch and liquid crystal display using the same
    3.
    发明申请
    Power supply control circuit having controllable switch and liquid crystal display using the same 有权
    电源控制电路具有可控开关和使用其的液晶显示器

    公开(公告)号:US20080180977A1

    公开(公告)日:2008-07-31

    申请号:US12011977

    申请日:2008-01-29

    IPC分类号: H02M7/02 G05F1/00 G09G5/00

    CPC分类号: H02J9/005

    摘要: An exemplary power supply control circuit (200) includes a first port (201), a second port (202), a third port (203), a controllable switch (280), and a control circuit (270). The first and second ports are configured to receive a power supply voltage signal. The second and third ports are configured to output the power supply voltage signal to a load circuit. The controllable switch includes a control member (281) and a switch member (282 ). The control circuit is configured to control a working state of the control member. When the load circuit stops working, the control circuit controls the control member to control the switch member to be disconnected, so as to cut off the power supply voltage signal from outputting to the load circuit. A liquid crystal display (400) using the power supply control circuit is also provided.

    摘要翻译: 示例性电源控制电路(200)包括第一端口(201),第二端口(202),第三端口(203),可控开关(280)和控制电路(270)。 第一和第二端口被配置为接收电源电压信号。 第二和第三端口被配置为将电源电压信号输出到负载电路。 可控开关包括控制构件(281)和开关构件(282)。 控制电路被配置为控制控制构件的工作状态。 当负载电路停止工作时,控制电路控制控制构件以控制开关构件的断开,从而将电源电压信号切断输出到负载电路。 还提供了使用电源控制电路的液晶显示器(400)。

    Power supply circuit with soft start circuit
    4.
    发明申请
    Power supply circuit with soft start circuit 有权
    电源电路采用软起动电路

    公开(公告)号:US20080158919A1

    公开(公告)日:2008-07-03

    申请号:US12005814

    申请日:2007-12-27

    IPC分类号: H02H7/122

    CPC分类号: H02M1/36

    摘要: An exemplary power supply circuit (20) includes a scaler (21), a field-effect transistor (23), a pulse width modulation circuit (25), and a capacitor (29). The scaler includes an output port (213). The pulse width modulation circuit includes an input port (251). The input port of the pulse width modulation circuit is grounded via the capacitor. The field-effect transistor includes a gate electrode (231), a source electrode (232), and a drain electrode (233). The gate electrode is connected to the output port of the scaler. The source electrode is grounded. The drain electrode is connected to the input port of the pulse width modulation circuit.

    摘要翻译: 示例性电源电路(20)包括缩放器(21),场效应晶体管(23),脉宽调制电路(25)和电容器(29)。 缩放器包括输出端口(213)。 脉宽调制电路包括输入端口(251)。 脉宽调制电路的输入端口通过电容器接地。 场效应晶体管包括栅电极(231),源电极(232)和漏电极(233)。 栅电极连接到定标器的输出端口。 源电极接地。 漏电极连接到脉宽调制电路的输入端口。

    Power supply circuit with soft start circuit
    5.
    发明授权
    Power supply circuit with soft start circuit 有权
    电源电路采用软启动电路

    公开(公告)号:US07755298B2

    公开(公告)日:2010-07-13

    申请号:US12005814

    申请日:2007-12-27

    IPC分类号: H05B39/02

    CPC分类号: H02M1/36

    摘要: An exemplary power supply circuit (20) includes a scaler (21), a field-effect transistor (23), a pulse width modulation circuit (25), and a capacitor (29). The scaler includes an output port (213). The pulse width modulation circuit includes an input port (251). The input port of the pulse width modulation circuit is grounded via the capacitor. The field-effect transistor includes a gate electrode (231), a source electrode (232), and a drain electrode (233). The gate electrode is connected to the output port of the scaler. The source electrode is grounded. The drain electrode is connected to the input port of the pulse width modulation circuit.

    摘要翻译: 示例性电源电路(20)包括缩放器(21),场效应晶体管(23),脉宽调制电路(25)和电容器(29)。 缩放器包括输出端口(213)。 脉宽调制电路包括输入端口(251)。 脉宽调制电路的输入端口通过电容器接地。 场效应晶体管包括栅电极(231),源电极(232)和漏电极(233)。 栅电极连接到定标器的输出端口。 源电极接地。 漏电极连接到脉宽调制电路的输入端口。

    Power supply control circuit having controllable switch and liquid crystal display using the same
    6.
    发明授权
    Power supply control circuit having controllable switch and liquid crystal display using the same 有权
    电源控制电路具有可控开关和使用其的液晶显示器

    公开(公告)号:US07839661B2

    公开(公告)日:2010-11-23

    申请号:US12011977

    申请日:2008-01-29

    IPC分类号: H02M3/335

    CPC分类号: H02J9/005

    摘要: An exemplary power supply control circuit (200) includes a first port (201), a second port (202), a third port (203), a controllable switch (280), and a control circuit (270). The first and second ports are configured to receive a power supply voltage signal. The second and third ports are configured to output the power supply voltage signal to a load circuit. The controllable switch includes a control member (281) and a switch member (282). The control circuit is configured to control a working state of the control member. When the load circuit stops working, the control circuit controls the control member to control the switch member to be disconnected, so as to cut off the power supply voltage signal from outputting to the load circuit. A liquid crystal display (400) using the power supply control circuit is also provided.

    摘要翻译: 示例性电源控制电路(200)包括第一端口(201),第二端口(202),第三端口(203),可控开关(280)和控制电路(270)。 第一和第二端口被配置为接收电源电压信号。 第二和第三端口被配置为将电源电压信号输出到负载电路。 可控开关包括控制构件(281)和开关构件(282)。 控制电路被配置为控制控制构件的工作状态。 当负载电路停止工作时,控制电路控制控制构件以控制开关构件的断开,从而将电源电压信号切断输出到负载电路。 还提供了使用电源控制电路的液晶显示器(400)。

    Power supply circuit with positive feedback circuit
    8.
    发明申请
    Power supply circuit with positive feedback circuit 审中-公开
    电源电路采用正反馈电路

    公开(公告)号:US20070291517A1

    公开(公告)日:2007-12-20

    申请号:US11820083

    申请日:2007-06-18

    申请人: Hua Xiao Tong Zhou

    发明人: Hua Xiao Tong Zhou

    IPC分类号: H02J3/00

    CPC分类号: H02M3/33523 H02M2001/0022

    摘要: An power supply circuit (2) includes a bridge rectifier circuit (22); a control circuit (23) having a switch circuit (231) and a pulse width modulation circuit (232); a high frequency transformer (24); at least one commutating and filter circuit (25); and a positive feedback circuit (29). An alternating current voltage input from an external source is converted into a high frequency direct current voltage via the bridge rectifier circuit, and the high frequency DC voltage is outputted from the power supply circuit via the switch circuit, the high frequency transformer, and the at least one commutating and filter circuit. The positive feedback circuit receives the high frequency DC voltage outputted by the bridge rectifier circuit and transmits the high frequency DC voltage to the pulse width modulation circuit, and the pulse width modulation circuit controls a conduction time of the switch circuit according to the received high frequency DC voltage.

    摘要翻译: 电源电路(2)包括桥式整流电路(22); 具有开关电路(231)和脉宽调制电路(232)的控制电路(23); 高频变压器(24); 至少一个换向和滤波电路(25); 和正反馈电路(29)。 从外部电源输入的交流电压通过桥式整流电路转换成高频直流电压,高频直流电压通过开关电路,高频变压器和电源电压从电源电路输出 最少一个换向和滤波电路。 正反馈电路接收桥式整流电路输出的高频直流电压,并将高频直流电压发送到脉宽调制电路,脉宽调制电路根据接收到的高频控制开关电路的导通时间 直流电压。

    Power supply circuit for liquid crystal display device and liquid crystal display device using the same
    9.
    发明授权
    Power supply circuit for liquid crystal display device and liquid crystal display device using the same 有权
    液晶显示装置用电源电路及使用其的液晶显示装置

    公开(公告)号:US07990373B2

    公开(公告)日:2011-08-02

    申请号:US11998043

    申请日:2007-11-27

    申请人: Hua Xiao Tong Zhou

    发明人: Hua Xiao Tong Zhou

    IPC分类号: G06F3/038

    CPC分类号: G09G3/3696

    摘要: An exemplary power supply circuit (200) for a liquid crystal display device (2) includes a switch control circuit (28) for receiving a control signal from an external control circuit, the control signal controlling the turning on or turning off of the switch control circuit; a first DC/DC converter (27) for adjusting the direct current voltage from an external circuit, outputting an output voltage. The switch control circuit controls switches the power supply of the output voltage to a liquid crystal display panel (20) of the liquid crystal display device.

    摘要翻译: 用于液晶显示装置(2)的示例性电源电路(200)包括用于从外部控制电路接收控制信号的开关控制电路(28),所述控制信号控制开关控制器的接通或断开 电路 用于调节来自外部电路的直流电压的第一DC / DC转换器(27),输出一个输出电压。 开关控制电路控制将输出电压的电源切换到液晶显示装置的液晶显示面板(20)。

    Backlight control circuit with two transistors
    10.
    发明授权
    Backlight control circuit with two transistors 有权
    背光控制电路有两个晶体管

    公开(公告)号:US07330003B2

    公开(公告)日:2008-02-12

    申请号:US11592940

    申请日:2006-11-03

    IPC分类号: H05B37/00

    摘要: An exemplary backlight control circuit (200) includes two load circuits (210), a pulse width modulation integrated circuit (PWM IC) (250) having a current sampling pin (251), a switching circuit (270), a first input circuit (230) and a second input circuit (240) including an input resistor. Each load circuit includes a backlight (211, 221) and an output end (212, 222). The first input circuit includes a diode (231), a resistor (232), a capacitor (233) and a voltage division resistor (234). A negative terminal of the diode is connected to ground via the resistor and the capacitor respectively, and is connected to the switching circuit. A positive terminal of the diode is connected to one of the output end of the load circuits. The other one of the output ends of the load circuits is connected to the current sampling pin via the input resistor.

    摘要翻译: 示例性背光控制电路(200)包括两个负载电路(210),具有电流采样引脚(251)的脉冲宽度调制集成电路(PWM IC)(250),开关电路(270),第一输入电路 230)以及包括输入电阻器的第二输入电路(240)。 每个负载电路包括背光源(211,221)和输出端(212,222)。 第一输入电路包括二极管(231),电阻器(232),电容器(233)和分压电阻器(234)。 二极管的负端子分别经由电阻器和电容器接地,并连接到开关电路。 二极管的正极端子连接到负载电路的输出端之一。 负载电路的另一个输出端通过输入电阻连接到电流采样引脚。