公开(公告)号：US20090284993A1

公开(公告)日：2009-11-19

申请号：US12454452

申请日：2009-05-18

申请人： Jie-Jian Zheng ,  Tong Zhou

发明人： Jie-Jian Zheng ,  Tong Zhou

IPC分类号： H02M3/335

CPC分类号： H02M3/3385

摘要： A switching power supply circuit includes a direct current (DC) power supply input; a voltage divider connected between the DC power supply input and ground; a transformer including a primary winding, a secondary winding, and an assistant winding; a pulse generating circuit including a first transistor, a second transistor, an oscillation capacitor, and an oscillation resistor; an output; and a feedback circuit adjusting a duty ratio of a pulse signal in the assistant winding. The DC power supply input is grounded via the primary winding, two conducting electrodes of the second transistor. A control electrode of the second transistor is connected to an output of the voltage divider. An output of the voltage divider is connected to a control electrode of the second transistor and is grounded via two conducting electrodes. A control electrode of the first transistor is grounded via the assistant winding and grounded via the oscillation capacitor and the oscillation resistor connected in series.

摘要翻译： 开关电源电路包括直流（DC）电源输入; 连接在直流电源输入和地之间的分压器; 包括初级绕组，次级绕组和辅助绕组的变压器; 脉冲发生电路，包括第一晶体管，第二晶体管，振荡电容器和振荡电阻器; 输出 以及调整辅助绕组中的脉冲信号的占空比的反馈电路。 直流电源输入通过初级绕组接地，第二晶体管的两个导电电极。 第二晶体管的控制电极连接到分压器的输出端。 分压器的输出端连接到第二晶体管的控制电极，并通过两个导电电极接地。 第一晶体管的控制电极通过辅助绕组接地，并通过振荡电容器和串联的振荡电阻器接地。

公开(公告)号：US07969407B2

公开(公告)日：2011-06-28

申请号：US11890373

申请日：2007-08-06

申请人： Jian-Hui Lu ,  He-Kang Zhou ,  Tong Zhou

发明人： Jian-Hui Lu ,  He-Kang Zhou ,  Tong Zhou

IPC分类号： G09G3/36

CPC分类号： G09G3/3406 ,  G09G2300/0456 ,  G09G2320/041 ,  G09G2330/023

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。

公开(公告)号：US07633241B2

公开(公告)日：2009-12-15

申请号：US11825886

申请日：2007-07-09

申请人： Jian-Hui Lu ,  Tong Zhou ,  He-Kang Zhou

发明人： Jian-Hui Lu ,  Tong Zhou ,  He-Kang Zhou

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。

公开(公告)号：US20080088257A1

公开(公告)日：2008-04-17

申请号：US11974803

申请日：2007-10-16

申请人： He-Kang Zhou ,  Jian-Hui Lu ,  Tong Zhou

发明人： He-Kang Zhou ,  Jian-Hui Lu ,  Tong Zhou

IPC分类号： H05B41/36 ,  H02H3/20

CPC分类号： H05B41/2853 ,  H02H3/202 ,  H05B41/3927 ,  Y02B20/186

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。

公开(公告)号：US20080036400A1

公开(公告)日：2008-02-14

申请号：US11891794

申请日：2007-08-13

申请人： Jian-Hui Lu ,  Tong Zhou

发明人： Jian-Hui Lu ,  Tong Zhou

IPC分类号： H05B41/14

CPC分类号： H05B41/2828 ,  Y02B20/186

摘要： An exemplary backlight control circuit (20) includes: at least two load circuits (210), a pulse width modulation integrated circuit (PWM IC) (250) having a current sampling pin (251), a switching circuit (270), and an input circuit (230). Each load circuit includes a backlight and a backlight inspecting circuit having an output end. The switching circuit includes a first transistor which includes a source electrode connected to ground, a drain electrode connected to the current sampling pin, a gate electrode connected to a power supply. The input circuit includes at least two first diodes, at least two input resistor, a second transistor, and a pink-to-pink detector circuit. The pink-to-pink detector circuit includes a second diode, a second bias resistor, and a second filter capacitor. Each output end of the load circuits is connected to the gate electrode of the second transistor via the input resistor, the first and second diode.

摘要翻译： 示例性背光控制电路（20）包括：至少两个负载电路（210），具有电流采样引脚（251）的脉宽调制集成电路（PWM IC）（250），开关电路（270）和 输入电路（230）。 每个负载电路包括具有输出端的背光和背光检测电路。 开关电路包括：第一晶体管，其包括连接到地的源电极，连接到电流采样引脚的漏电极，连接到电源的栅电极。 输入电路包括至少两个第一二极管，至少两个输入电阻器，第二晶体管和粉红色至粉红色检测器电路。 粉红色至粉红色检测器电路包括第二二极管，第二偏置电阻器和第二滤波电容器。 负载电路的每个输出端经由输入电阻器第一和第二二极管连接到第二晶体管的栅电极。

公开(公告)号：US07787273B2

公开(公告)日：2010-08-31

申请号：US12004850

申请日：2007-12-21

申请人： Jian-Hui Lu ,  Tong Zhou

发明人： Jian-Hui Lu ,  Tong Zhou

IPC分类号： H02M7/538

CPC分类号： H02M7/5381 ,  H02M2001/009

摘要： An exemplary inverter circuit (2) includes a first switch circuit (22) including a first transistor (221) and a second transistor (222); a second switch circuit (23) including a third transistor (231) and a fourth transistor (232); and a pulse width modulation circuit (21) including a first output terminal (211) and a second output terminal (212). A gate electrode of the first transistor is connected to the first output port. A gate electrode of the second transistor is connected to the second output port. A gate electrode of the third transistor is connected to the first output port. A gate electrode of the fourth transistor is connected to the second output port. A drain electrode of the third transistor is connected to a drain electrode of the first transistor, and a drain electrode of the fourth transistor is connected to a drain electrode of the second transistor.

摘要翻译： 示例性的逆变器电路（2）包括包括第一晶体管（221）和第二晶体管（222）的第一开关电路（22）。 包括第三晶体管（231）和第四晶体管（232）的第二开关电路（23）; 以及包括第一输出端子（211​​）和第二输出端子（212）的脉宽调制电路（21）。 第一晶体管的栅电极连接到第一输出端口。 第二晶体管的栅电极连接到第二输出端口。 第三晶体管的栅电极连接到第一输出端口。 第四晶体管的栅电极连接到第二输出端口。 第三晶体管的漏极连接到第一晶体管的漏电极，第四晶体管的漏电极连接到第二晶体管的漏电极。

公开(公告)号：US07737644B2

公开(公告)日：2010-06-15

申请号：US11824884

申请日：2007-07-02

申请人： Jian-Hui Lu ,  Tong Zhou ,  He-Kang Zhou

发明人： Jian-Hui Lu ,  Tong Zhou ,  He-Kang Zhou

IPC分类号： G05F1/00

CPC分类号： H05B41/282 ,  H05B41/2855 ,  Y02B20/183 ,  Y02B20/186

摘要： An exemplary backlight control circuit (20) includes at least two sampling circuits (21), at least two feedback circuits (22), and a PWM IC (23). Each of the sampling circuits includes a sampling output (210) and a backlight lamp (211). The PWM IC includes a current sense pin (230). The at least two feedback circuits correspond to the at least two sampling circuits, respectively. Each of the feedback circuits includes a resistor (222) and a diode (223) electrically coupled in parallel. The sampling output is configured to output a first voltage when the backlight lamp is in a normal working state, and output a second voltage when the backlight lamp has an open circuit. One terminal of the diode is electrically coupled to the sampling output of a corresponding one of the sampling circuits, and an opposite terminal of the diode is electrically coupled to the current sense pin.

摘要翻译： 示例性背光控制电路（20）包括至少两个采样电路（21），至少两个反馈电路（22）和PWM IC（23）。 每个采样电路包括采样输出（210）和背光灯（211）。 PWM IC包括电流检测引脚（230）。 至少两个反馈电路分别对应于至少两个采样电路。 每个反馈电路包括并联电耦合的电阻器（222）和二极管（223）。 采样输出被配置为当背光灯处于正常工作状态时输出第一电压，并且当背光灯具有开路时输出第二电压。 二极管的一个端子电耦合到对应的一个采样电路的采样输出，并且二极管的相对端子电耦合到电流检测引脚。

公开(公告)号：US07638955B2

公开(公告)日：2009-12-29

申请号：US11824884

申请日：2007-07-02

申请人： Jian-Hui Lu ,  Tong Zhou ,  He-Kang Zhou

发明人： Jian-Hui Lu ,  Tong Zhou ,  He-Kang Zhou

IPC分类号： G05F1/00

摘要： An exemplary backlight control circuit (20) includes at least two sampling circuits (21), at least two feedback circuits (22), and a PWM IC (23). Each of the sampling circuits includes a sampling output (210) and a backlight lamp (211). The PWM IC includes a current sense pin (230). The at least two feedback circuits correspond to the at least two sampling circuits, respectively. Each of the feedback circuits includes a resistor (222) and a diode (223) electrically coupled in parallel. The sampling output is configured to output a first voltage when the backlight lamp is in a normal working state, and output a second voltage when the backlight lamp has an open circuit. One terminal of the diode is electrically coupled to the sampling output of a corresponding one of the sampling circuits, and an opposite terminal of the diode is electrically coupled to the current sense pin.

公开(公告)号：US20080106839A1

公开(公告)日：2008-05-08

申请号：US11982861

申请日：2007-11-05

申请人： He-Kang Zhou ,  Jian-Hui Lu ,  Tong Zhou

发明人： He-Kang Zhou ,  Jian-Hui Lu ,  Tong Zhou

IPC分类号： H02H1/04 ,  H05K1/00

CPC分类号： H01T4/08 ,  H05K1/026

摘要： An exemplary printed circuit board (2) includes a substrate (21) and a printed circuit (20) formed on the substrate. The printed circuit includes a first input wire (210) and a ground wire (230). The first input wire includes at least one tip and the ground wire includes at least one tip facing the at least one tip of the first input wire. Each of the tips of the first input wire and the ground wire defines a pointed end.

摘要翻译： 示例性印刷电路板（2）包括基板（21）和形成在基板上的印刷电路（20）。 印刷电路包括第一输入线（210）和接地线（230）。 第一输入线包括至少一个尖端，并且接地线包括面向第一输入线的至少一个尖端的至少一个尖端。 第一输入线和接地线的每个尖端限定尖端。

公开(公告)号：US20080007186A1

公开(公告)日：2008-01-10

申请号：US11825886

申请日：2007-07-09

申请人： Jian-Hui Lu ,  Tong Zhou ,  He-Kang Zhou

发明人： Jian-Hui Lu ,  Tong Zhou ,  He-Kang Zhou

IPC分类号： H05B41/24

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。