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公开(公告)号:US20080158919A1
公开(公告)日:2008-07-03
申请号:US12005814
申请日:2007-12-27
申请人: Han-Tao Liu , Tong Zhou , Hua Xiao , Kun Le , Jian-Hui Lu
发明人: Han-Tao Liu , Tong Zhou , Hua Xiao , Kun Le , Jian-Hui Lu
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。
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公开(公告)号:US20070216370A1
公开(公告)日:2007-09-20
申请号:US11725912
申请日:2007-03-19
IPC分类号: H02J7/04
CPC分类号: H02J7/06 , H02J7/0072
摘要: An exemplary charging circuit (200) includes for charging a load component (210) includes a power supply unit (220), a feedback circuit, and a sampling resistor (230). The power supply unit includes a pulse width modulation circuit (221) and a power output terminal (222) configured to output a direct current supply. The feedback circuit includes an amplifying comparator (241), a constant voltage circuit (242), a transistor (243), and an optoelectrical coupler (244). The constant voltage circuit is configured to generate a reference voltage and apply the reference voltage to a negative input terminal of the amplifier comparator. An output terminal of the amplifier comparator is connected to the pulse width modulation circuit via the transistor and the optoelectrical coupler. The sampling resistor includes a current sampling terminal connected to a positive input terminal of the amplifier comparator.
摘要翻译: 示例性充电电路(200)包括用于对负载组件(210)充电,其包括电源单元(220),反馈电路和采样电阻器(230)。 电源单元包括被配置为输出直流电源的脉宽调制电路(221)和功率输出端子(222)。 反馈电路包括放大比较器(241),恒压电路(242),晶体管(243)和光电耦合器(244)。 恒压电路被配置为产生参考电压并将参考电压施加到放大器比较器的负输入端。 放大器比较器的输出端经由晶体管和光电耦合器连接到脉宽调制电路。 采样电阻器包括连接到放大器比较器的正输入端的电流采样端子。
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公开(公告)号:US20060284576A1
公开(公告)日:2006-12-21
申请号:US11455918
申请日:2006-06-19
IPC分类号: H05B39/00
CPC分类号: H05B41/2855 , H05B37/03
摘要: An exemplary backlight control circuit (200) includes two backlight inspecting circuits (210), a pulse width modulation integrated circuit (PWM IC) (250) having a current sampling pin (251), a first transistor (271), and an input circuit (230). Each backlight inspecting circuit includes a backlight (211) and an output end (212). The input circuit includes a second transistor (233), a resistor (232), and two diodes (231). The source electrodes of the first and second transistors grounded. The drain electrode of the first transistor is connected to the current sampling pin. The gate electrode of the first transistor and the drain electrode of the second transistor are connected to a power supply. The gate electrode of the second transistor and the positive terminals of the diodes are connected to the power supply via the resistor. The negative terminals of the diodes are respectively connected to the output ends of the backlight inspecting circuit.
摘要翻译: 示例性背光控制电路(200)包括两个背光检测电路(210),具有电流采样引脚(251)的脉宽调制集成电路(PWM IC)(250),第一晶体管(271)和输入电路 (230)。 每个背光检测电路包括背光源(211)和输出端(212)。 输入电路包括第二晶体管(233),电阻器(232)和两个二极管(231)。 第一和第二晶体管的源电极接地。 第一晶体管的漏电极连接到电流采样管脚。 第一晶体管的栅电极和第二晶体管的漏电极连接到电源。 第二晶体管的栅电极和二极管的正极通过电阻连接到电源。 二极管的负极端子分别连接到背光检测电路的输出端。
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公开(公告)号:US07898824B2
公开(公告)日:2011-03-01
申请号:US12217357
申请日:2008-07-02
IPC分类号: H02M3/335
CPC分类号: H02M3/33523
摘要: An exemplary power supply circuit (200) includes a pulse width modulation circuit (220) providing a pulse signal, a voltage conversion circuit (210) converting a primary voltage to an output voltage according to the pulse signal, a feedback circuit (260), and a control circuit (290). The feedback circuit includes a sampling branch (261) detecting a current of the voltage conversion circuit and accordingly providing a feedback signal, and a voltage division branch (262) electrically coupled to the sampling branch. The control circuit is electrically coupled to the voltage division branch, and is configured for disabling the voltage division branch after a predetermined period of time when the output voltage is within a predetermined range.
摘要翻译: 示例性电源电路(200)包括提供脉冲信号的脉宽调制电路(220),根据脉冲信号将初级电压转换为输出电压的电压转换电路(210),反馈电路(260) 和控制电路(290)。 反馈电路包括检测电压转换电路的电流并因此提供反馈信号的采样分支(261),以及电耦合到采样分支的分压支路(262)。 控制电路电耦合到分压支路,并且被配置为在输出电压在预定范围内的预定时间段之后禁用分压支路。
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公开(公告)号:US07570317B2
公开(公告)日:2009-08-04
申请号:US11642044
申请日:2006-12-18
IPC分类号: G02F1/1333
CPC分类号: G06F1/1605
摘要: An exemplary flat panel display includes a back cover having a receiving space, and conductive wires accommodated in the receiving space. The back cover includes an inner surface corresponding to the receiving space. Typically, plural fixing elements for fastening the conductive wires are arranged on the inner surface, which can secure the conductive wires on the back cover.
摘要翻译: 示例性的平板显示器包括具有接收空间的后盖和容纳在接收空间中的导线。 后盖包括对应于接收空间的内表面。 通常,用于紧固导线的多个固定元件布置在内表面上,这可以将导线固定在后盖上。
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公开(公告)号:US07372218B2
公开(公告)日:2008-05-13
申请号:US11604620
申请日:2006-11-27
申请人: Tong Zhou , Huai-Zhu Yan , Kun Le
发明人: Tong Zhou , Huai-Zhu Yan , Kun Le
CPC分类号: H05B41/2855 , Y02B20/186
摘要: An open protection circuit (300) for a backlight module includes a PWM (350) with a control port (351) to disable the PWM. A switch (371) has a gate and a source connected to the control port. A plurality of first input circuits (330) includes first diodes (331), each of which has a first positive terminal connected to the gate and a negative terminal connected to ground. A plurality of second input circuits (340) include input resistors (341) connected to the control port. A plurality of detecting circuits (310, 380) are connected to the fluorescent lamps (311) and the first and second input circuits respectively. Each detecting circuit includes a sampling resistor (313) connected to one of the negative terminals of the first diodes, thereby the control port of the PWM is pulled low when either one of the fluorescent lamps are open-circuit.
摘要翻译: 用于背光模块的开路保护电路(300)包括具有用于禁止PWM的控制端口(351)的PWM(350)。 开关(371)具有连接到控制端口的栅极和源极。 多个第一输入电路(330)包括第一二极管(331),每个第二二极管具有连接到栅极的第一正端子和与地连接的负端子。 多个第二输入电路(340)包括连接到控制端口的输入电阻(341)。 多个检测电路(310,380)分别连接到荧光灯(311)和第一和第二输入电路。 每个检测电路包括连接到第一二极管的负极之一的采样电阻器(313),因此当任一个荧光灯都是开路时,PWM的控制端口被拉低。
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27.
公开(公告)号:US20080106920A1
公开(公告)日:2008-05-08
申请号:US11982968
申请日:2007-11-05
申请人: Jin-Liang Xiong , Tong Zhou , Jian-Hui Lu , Kun Le
发明人: Jin-Liang Xiong , Tong Zhou , Jian-Hui Lu , Kun Le
CPC分类号: H02M7/5381 , Y10T307/50
摘要: An exemplary inverter circuit (200) includes a direct current (DC) input terminal (210); a transformer (230) including a first primary winding (231) and a second primary winding (232); a first switch transistor (240); a second switch transistor (250); a pulse generator (260) providing pulse driving signals to the first switch transistor and the second transistor respectively; and a resistor (29). The first primary winding and the second primary winding share a tap (235), the tap is connected to the DC input terminal via the resistor. A drain electrode of the first switch transistor is connected to the tap via the first primary winding, and a drain electrode of the second switch transistor is connected to the tap via the second primary winding.
摘要翻译: 示例性的逆变器电路(200)包括直流(DC)输入端子(210); 包括第一初级绕组(231)和第二初级绕组(232)的变压器(230); 第一开关晶体管(240); 第二开关晶体管(250); 脉冲发生器(260),分别向第一开关晶体管和第二晶体管提供脉冲驱动信号; 和电阻(29)。 第一初级绕组和第二初级绕组共享一个抽头(235),抽头通过电阻连接到直流输入端。 第一开关晶体管的漏电极经由第一初级绕组连接到抽头,并且第二开关晶体管的漏电极经由第二初级绕组连接到抽头。
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公开(公告)号:US20080017881A1
公开(公告)日:2008-01-24
申请号:US11824886
申请日:2007-07-02
申请人: Kun Le
发明人: Kun Le
IPC分类号: H01L29/74
CPC分类号: G09G3/36 , G09G2330/02 , G09G2330/04
摘要: An exemplary power supplying and discharging circuit (200) includes a control signal input terminal (21), an output terminal (26), a direct current (DC) power supply (22), a bias resistor (27), a first transistor (23), a second transistor (24), and a third transistor (25). The first transistor includes a base electrode connected to the control signal input terminal, a collector electrode connected to the DC power supply via the bias transistor, and an emitter electrode grounded. The second transistor includes a base electrode connected to the collector electrode of the first transistor, a collector electrode connected to the output terminal, and an emitter electrode grounded. The third transistor includes a gate electrode connected to the collector electrode of the first transistor, a source electrode connected to the DC power supply, and a drain electrode connected to the output terminal.
摘要翻译: 示例性的供电和放电电路(200)包括控制信号输入端(21),输出端(26),直流(DC)电源(22),偏置电阻(27),第一晶体管 23),第二晶体管(24)和第三晶体管(25)。 第一晶体管包括连接到控制信号输入端子的基极电极,经由偏置晶体管连接到DC电源的集电极电极和接地的发射极。 第二晶体管包括连接到第一晶体管的集电极的基极,连接到输出端的集电极和接地的发射极。 第三晶体管包括连接到第一晶体管的集电极的栅电极,连接到直流电源的源电极和连接到输出端的漏电极。
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公开(公告)号:US20070252637A1
公开(公告)日:2007-11-01
申请号:US11796795
申请日:2007-04-30
申请人: Tong Zhou , Jia-Hui Tu , Kun Le
发明人: Tong Zhou , Jia-Hui Tu , Kun Le
IPC分类号: H03K17/687
CPC分类号: H03K17/6877 , G09G3/3696 , G09G2330/021
摘要: An exemplary power switching circuit (20) includes a control signal input terminal (210) which is configured for receiving a control signal; an output terminal (220) configured to be connected to a load circuit with capacitance; a direct current (DC) power supply (230); a first switching transistor (240) including a control electrode connected to the control signal input terminal, a first current conducting electrode, and a grounded second current conducting electrode; a second switching transistor (250) including a control electrode connected to the first current conducting electrode of the first switching transistor, a first current conducting electrode connected to the DC power supply, and a second current conducting electrode connected to the output terminal; and a third switching transistor (260) including a control electrode connected to the control signal input terminal, a first current conducting electrode connected to the output terminal, and a grounded second current conducting electrode.
摘要翻译: 示例性功率开关电路(20)包括被配置为接收控制信号的控制信号输入端(210) 输出端子(220),被配置为连接到具有电容的负载电路; 直流(DC)电源(230); 第一开关晶体管(240),包括连接到控制信号输入端子的控制电极,第一导电电极和接地的第二导电电极; 第二开关晶体管(250),包括连接到第一开关晶体管的第一导电电极的控制电极,连接到直流电源的第一导电电极和连接到输出端子的第二导电电极; 以及第三开关晶体管(260),其包括连接到所述控制信号输入端子的控制电极,连接到所述输出端子的第一导电电极和接地的第二导电电极。
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公开(公告)号:US20070097283A1
公开(公告)日:2007-05-03
申请号:US11590371
申请日:2006-10-30
IPC分类号: G02F1/136
CPC分类号: G09G3/3406 , G09G2330/08
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 first transistor (271), a first input circuit (230) and a second input circuit (240) including an input resistor. Each load circuit includes an output end (212, 222). The first input circuit includes a second transistor (234). The drain electrode of the first transistor is connected to the current sampling pin. The gate electrode of the first transistor is connected to the drain electrode of the second transistor and is connected to a power supply. The gate electrode of the second transistor is connected to one of the output ends of the load circuits via the diode. 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),第一晶体管(271),第一输入电路 230)和包括输入电阻器的第二输入电路(240)。 每个负载电路包括输出端(212,222)。 第一输入电路包括第二晶体管(234)。 第一晶体管的漏电极连接到电流采样管脚。 第一晶体管的栅电极连接到第二晶体管的漏电极,并连接到电源。 第二晶体管的栅电极通过二极管连接到负载电路的一个输出端。 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。
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