Backlight driving circuit with follower and liquid crystal display using same
    1.
    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。

    Backlight modulation circuit
    2.
    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。

    Backlight control circuit with input circuit including diode and capacitor
    3.
    发明申请
    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:US20080088257A1

    公开(公告)日:2008-04-17

    申请号:US11974803

    申请日:2007-10-16

    IPC分类号: H05B41/36 H02H3/20

    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。

    Backlight control circuit with feedback circuit
    4.
    发明授权
    Backlight control circuit with feedback circuit 有权
    带反馈电路的背光控制电路

    公开(公告)号:US07737644B2

    公开(公告)日:2010-06-15

    申请号:US11824884

    申请日:2007-07-02

    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.

    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。

    Backlight control circuit with feedback circuit

    公开(公告)号:US07638955B2

    公开(公告)日:2009-12-29

    申请号:US11824884

    申请日:2007-07-02

    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.

    Printed circuit board having lightning protection device
    6.
    发明申请
    Printed circuit board having lightning protection device 审中-公开
    具有防雷装置的印刷电路板

    公开(公告)号:US20080106839A1

    公开(公告)日:2008-05-08

    申请号:US11982861

    申请日:2007-11-05

    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。

    Backlight modulation circuit
    7.
    发明申请
    Backlight modulation circuit 有权
    背光调制电路

    公开(公告)号:US20080007186A1

    公开(公告)日:2008-01-10

    申请号:US11825886

    申请日:2007-07-09

    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。

    Backlight control circuit with input circuit including diode and capacitor
    8.
    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
    9.
    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 capacitive discharging current path and liquid crystal display with same
    10.
    发明申请
    Backlight driving circuit with capacitive discharging current path and liquid crystal display with same 审中-公开
    具有电容放电电流通道的背光驱动电路和与此相同的液晶显示器

    公开(公告)号:US20080030147A1

    公开(公告)日:2008-02-07

    申请号:US11890377

    申请日:2007-08-06

    IPC分类号: H05B41/00

    CPC分类号: H05B41/2828

    摘要: An exemplary backlight driving circuit (20) includes a first pulse generator (230), a second pulse generator (240), a transformer (250) having a primary winding (251), a first transistor (210), a second transistor (220), and a first capacitor (290). The first transistor is a P-MOSFET. The first transistor includes a gate electrode (211) connected to the first pulse generator, and a drain electrode (213) connected to a first terminal (252) of the primary winding. The second transistor is an N-MOSFET. The second transistor includes a gate electrode (221) connected to the second pulse generator, a source electrode (222) connected to ground, and a drain electrode (223) connected to the first terminal of the primary winding. The first capacitor includes one terminal connected to a second terminal of the primary winding.

    摘要翻译: 示例性背光驱动电路(20)包括第一脉冲发生器(230),第二脉冲发生器(240),具有初级绕组(251)的变压器(250),第一晶体管(210),第二晶体管 )和第一电容器(290)。 第一个晶体管是P-MOSFET。 第一晶体管包括连接到第一脉冲发生器的栅电极(211)和连接到初级绕组的第一端子(252)的漏电极(213)。 第二个晶体管是一个N-MOSFET。 第二晶体管包括连接到第二脉冲发生器的栅电极(221),连接到地的源极(222)和连接到初级绕组的第一端的漏电极(223)。 第一电容器包括连接到初级绕组的第二端子的一个端子。