Power supply circuit with pulse generating circuit and current-limiting circuit
    1.
    发明申请
    Power supply circuit with pulse generating circuit and current-limiting circuit 审中-公开
    具有脉冲发生电路和限流电路的电源电路

    公开(公告)号:US20080239767A1

    公开(公告)日:2008-10-02

    申请号:US12079976

    申请日:2008-03-31

    IPC分类号: H02M3/335

    CPC分类号: H02M3/33507

    摘要: An exemplary power supply circuit (200) includes a transformer (240), a first transistor (260), a start-up resistor (261), and a pulse generating circuit (250). The transformer includes a primary winding (241), a secondary winding (243), and an auxiliary winding (242). The first bipolar junction transistor includes a collector connected to a first terminal of the primary winding and an emitter grounded. The start-up resistor is connected between a second terminal of the primary winding and a base of the bipolar junction transistor. The pulse generating circuit is configured for generating a control signal according to an induction voltage of the auxiliary winding. The control signal is provided to the base of the first bipolar junction transistor for switching the first bipolar junction transistor.

    摘要翻译: 示例性电源电路(200)包括变压器(240),第一晶体管(260),启动电阻器(261)和脉冲发生电路(250)。 变压器包括初级绕组(241),次级绕组(243)和辅助绕组(242)。 第一双极结型晶体管包括连接到初级绕组的第一端子和发射极接地的集电极。 启动电阻连接在初级绕组的第二端子和双极结型晶体管的基极之间。 脉冲发生电路被配置为根据辅助绕组的感应电压产生控制信号。 控制信号被提供到用于切换第一双极结型晶体管的第一双极结型晶体管的基极。

    Direct current to direct current converter
    2.
    发明授权
    Direct current to direct current converter 有权
    直流电直流电转换器

    公开(公告)号:US07848119B2

    公开(公告)日:2010-12-07

    申请号:US12069921

    申请日:2008-02-12

    IPC分类号: H02M3/335

    CPC分类号: H02M3/3381

    摘要: An exemplary DC to DC converter (2) includes a transistor (29), a first rectifying and filtering circuit (21), a pulse generating circuit (27) and a transformer (25). The first rectifying and filtering circuit transforms an external AC voltage to a first DC voltage. The transformer includes a primary winding (251), an assistant winding (252) connected with the primary winding in a flyback mode, and a secondary winding (253). The first DC voltage is connected to ground via the primary winding, the transistor in series. The pulse generating circuit includes a controlling terminal, a diode, a resistor, and a capacitor. One terminal of the assistant winding is connected to ground, and the other terminal of the assistant winding is connected to an anode of the diode. A cathode of the diode is connected to ground via the resistor and the capacitor in series. The controlling terminal is connected to gate electrode of the transistor.

    摘要翻译: 示例性DC-DC转换器(2)包括晶体管(29),第一整流和滤波电路(21),脉冲发生电路(27)和变压器(25)。 第一整流滤波电路将外部交流电压变换为第一直流电压。 变压器包括初级绕组(251),以回扫模式与初级绕组连接的辅助绕组(252)和次级绕组(253)。 第一个直流电压通过初级绕组连接到地,晶体管串联。 脉冲发生电路包括控制端子,二极管,电阻器和电容器。 辅助绕组的一个端子连接到地,辅助绕组的另一个端子连接到二极管的阳极。 二极管的阴极通过电阻器和电容器串联连接到地。 控制端子连接到晶体管的栅电极。

    Power supply control circuit having controllable switch and liquid crystal display using the same
    3.
    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)。

    Direct current to direct current converter
    4.
    发明申请
    Direct current to direct current converter 有权
    直流电直流电转换器

    公开(公告)号:US20080192512A1

    公开(公告)日:2008-08-14

    申请号:US12069921

    申请日:2008-02-12

    IPC分类号: H02M3/338

    CPC分类号: H02M3/3381

    摘要: An exemplary DC to DC converter (2) includes a transistor (29), a first rectifying and filtering circuit (21), a pulse generating circuit (27) and a transformer (25). The first rectifying and filtering circuit transforms an external AC voltage to a first DC voltage. The transformer includes a primary winding (251), an assistant winding (252) connected with the primary winding in a flyback mode, and a secondary winding (253). The first DC voltage is connected to ground via the primary winding, the transistor in series. The pulse generating circuit includes a controlling terminal, a diode, a resistor, and a capacitor. One terminal of the assistant winding is connected to ground, and the other terminal of the assistant winding is connected to an anode of the diode. A cathode of the diode is connected to ground via the resistor and the capacitor in series. The controlling terminal is connected to gate electrode of the transistor.

    摘要翻译: 示例性DC-DC转换器(2)包括晶体管(29),第一整流和滤波电路(21),脉冲发生电路(27)和变压器(25)。 第一整流滤波电路将外部交流电压变换为第一直流电压。 变压器包括初级绕组(251),以回扫模式与初级绕组连接的辅助绕组(252)和次级绕组(253)。 第一个直流电压通过初级绕组连接到地,晶体管串联。 脉冲发生电路包括控制端子,二极管,电阻器和电容器。 辅助绕组的一个端子连接到地,辅助绕组的另一个端子连接到二极管的阳极。 二极管的阴极通过电阻器和电容器串联连接到地。 控制端子连接到晶体管的栅电极。

    Power supply control circuit having controllable switch and liquid crystal display using the same
    5.
    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)。

    Backlight control circuit with input circuit including diode and capacitor
    6.
    发明授权
    Backlight control circuit with input circuit including diode and capacitor 有权
    背光控制电路,输入电路包括二极管和电容

    公开(公告)号:US07973760B2

    公开(公告)日:2011-07-05

    申请号:US11974803

    申请日:2007-10-16

    IPC分类号: G09G3/36

    摘要: An exemplary backlight control circuit (200) includes a DC power supply (VDD), a load circuit (210), an input circuit (230), and a PWM IC (250). The load circuit includes two light sources (2113, 2114) and a rectifier and filter circuit (213). The input circuit includes a diode (231) and a capacitor (237). The PWM IC includes a current sampling pin (251) and an overvoltage protection pin (253). A low voltage terminal of a first one of the two light sources is connected to the current sampling pin via the rectifier and filter circuit, and a low voltage terminal of a second one of the two light sources is connected to a cathode of the diode. An anode of the diode is connected to the DC power supply and grounded via the capacitor. The overvoltage protection pin is connected to the DC power supply.

    摘要翻译: 示例性背光控制电路(200)包括直流电源(VDD),负载电路(210),输入电路(230)和PWM IC(250)。 负载电路包括两个光源(2113,2114)和整流器和滤波电路(213)。 输入电路包括二极管(231)和电容器(237)。 PWM IC包括电流采样引脚(251)和过压保护引脚(253)。 两个光源中的第一个的低电压端子经由整流器和滤波电路连接到电流采样引脚,并且两个光源中的第二个的低电压端子连接到二极管的阴极。 二极管的阳极连接到直流电源,并通过电容器接地。 过压保护引脚连接到直流电源。

    Transflective mode liquid crystal display
    7.
    发明申请
    Transflective mode liquid crystal display 有权
    透反式液晶显示

    公开(公告)号:US20080030454A1

    公开(公告)日:2008-02-07

    申请号:US11890373

    申请日:2007-08-06

    IPC分类号: G09G3/36

    摘要: An exemplary backlight driving circuit (20) a first power supply (260); a second power supply (270); a signal output terminal (280); an AND gate (210); a follower (220); a capacitor (290); a reverser (230); a first transistor (240), which is a N-Channel mode metal-oxide-semiconductor field-effect transistor (N-MOSFET), having a gate electrode connected to an output end of the AND gate through the follower, a source electrode connected to the signal output terminal, a drain electrode connected to the first power supply; and a second transistor (250), which is a N-Channel mode metal-oxide-semiconductor field-effect transistor (N-MOSFET), having a gate electrode connected to the output end of the AND gate through the reverser, a source electrode connected to the ground, a drain electrode connected to the signal output terminal.

    摘要翻译: 示例性背光驱动电路(20),第一电源(260); 第二电源(270); 信号输出端子(280); 与门(210); 追随者(220); 电容器(290); 反向器(230); 第一晶体管(240),其是N沟道模式金属氧化物半导体场效应晶体管(N-MOSFET),其栅极通过跟随器连接到与门的输出端,源电极连接 到所述信号输出端子,连接到所述第一电源的漏电极; 以及作为N沟道模式金属氧化物半导体场效应晶体管(N-MOSFET)的第二晶体管(250),其栅极通过反向器连接到与门的输出端,源电极 连接到地,漏极连接到信号输出端。

    Backlight driving circuit with follower and liquid crystal display using same
    8.
    发明授权
    Backlight driving circuit with follower and liquid crystal display using same 有权
    带跟随器的背光驱动电路和使用相同的液晶显示器

    公开(公告)号:US07969407B2

    公开(公告)日:2011-06-28

    申请号:US11890373

    申请日:2007-08-06

    IPC分类号: G09G3/36

    摘要: An exemplary backlight driving circuit (20) a first power supply (260); a second power supply (270); a signal output terminal (280); an AND gate (210); a follower (220); a capacitor (290); a reverser (230); a first transistor (240), which is a N-Channel mode metal-oxide-semiconductor field-effect transistor (N-MOSFET), having a gate electrode connected to an output end of the AND gate through the follower, a source electrode connected to the signal output terminal, a drain electrode connected to the first power supply; and a second transistor (250), which is a N-Channel mode metal-oxide-semiconductor field-effect transistor (N-MOSFET), having a gate electrode connected to the output end of the AND gate through the reverser, a source electrode connected to the ground, a drain electrode connected to the signal output terminal.

    摘要翻译: 示例性背光驱动电路(20),第一电源(260); 第二电源(270); 信号输出端子(280); 与门(210); 追随者(220); 电容器(290); 反向器(230); 第一晶体管(240),其是N沟道模式金属氧化物半导体场效应晶体管(N-MOSFET),其栅极通过跟随器连接到与门的输出端,源电极连接 到所述信号输出端子,连接到所述第一电源的漏电极; 以及作为N沟道模式金属氧化物半导体场效应晶体管(N-MOSFET)的第二晶体管(250),其栅极通过反向器连接到与门的输出端,源电极 连接到地,漏极连接到信号输出端。

    Power supply circuit with soft start circuit
    9.
    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。

    Backlight modulation circuit
    10.
    发明授权
    Backlight modulation circuit 有权
    背光调制电路

    公开(公告)号:US07633241B2

    公开(公告)日:2009-12-15

    申请号:US11825886

    申请日:2007-07-09

    IPC分类号: H05B37/02

    CPC分类号: H05B41/3927

    摘要: An exemplary backlight modulation circuit (200) includes a pulse generator circuit (210) configured for generating a first square pulse; a voltage division circuit (230) configured for receiving the first square pulse and generating a second square pulse according to the first square pulse; an oscillator circuit (240) configured for generating a reference voltage; and an amplifier (200) comprising a negative input configured for receiving the second square pulse from the voltage division circuit, and a positive input configured for receiving the reference voltage from the oscillator circuit as a reference pulse signal, the amplifier being configured for generating a backlight adjusting signal according to the reference pulse signal and the second square pulse.

    摘要翻译: 示例性背光调制电路(200)包括被配置为产生第一平方脉冲的脉冲发生器电路(210) 分压电路(230),被配置为接收所述第一平方脉冲并根据所述第一平方脉冲产生第二平方脉冲; 配置用于产生参考电压的振荡器电路(240); 以及放大器(200),包括被配置为从所述分压电路接收所述第二平方脉冲的负输入和被配置为从所述振荡器电路接收所述参考电压作为参考脉冲信号的正输入,所述放大器被配置为产生 根据参考脉冲信号和第二平方脉冲的背光调整信号。