公开(公告)号：US08664895B2

公开(公告)日：2014-03-04

申请号：US13556690

申请日：2012-07-24

申请人： Tiesheng Yan ,  Youling Li ,  Feng Lin ,  Xinhe Su ,  Ching-Chuan Kuo

发明人： Tiesheng Yan ,  Youling Li ,  Feng Lin ,  Xinhe Su ,  Ching-Chuan Kuo

IPC分类号： H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  G05F1/00 ,  H05B39/02 ,  H05B41/16 ,  H05B41/24 ,  H05B37/00 ,  H05B39/00 ,  H05B41/00

CPC分类号： H05B37/02 ,  H05B33/0815

摘要： A controller for controlling power to a light source includes a first sensing pin, a second sensing pin, a third sensing pin, and a driving pin. The first sensing pin receives a first signal indicating an instant current flowing through an energy storage element. The second sensing pin receives a second signal indicating an average current flowing through the energy storage element. The third sensing pin receives a third signal indicating whether the instant current decreases to a predetermined current level. The driving pin provides a driving signal to a switch to control an average current flowing through the light source to a target current level. The driving signal is generated based on one or more signals selected from the first signal, the second signal and the third signal.

摘要翻译： 用于控制光源的功率的控制器包括第一感测针，第二感测针，第三感测针和驱动针。 第一感测引脚接收指示流过能量存储元件的瞬时电流的第一信号。 第二感测针接收指示流过能量存储元件的平均电流的第二信号。 第三感测针接收指示瞬时电流是否降低到预定电流电平的第三信号。 驱动引脚向开关提供驱动信号，以将流过光源的平均电流控制到目标电流水平。 基于从第一信号，第二信号和第三信号中选择的一个或多个信号产生驱动信号。

公开(公告)号：US20120299502A1

公开(公告)日：2012-11-29

申请号：US13556690

申请日：2012-07-24

申请人： Tiesheng YAN ,  Youling LI ,  Feng LIN ,  Xinhe SU ,  Ching-Chuan KUO

发明人： Tiesheng YAN ,  Youling LI ,  Feng LIN ,  Xinhe SU ,  Ching-Chuan KUO

IPC分类号： H05B37/02

CPC分类号： H05B37/02 ,  H05B33/0815

摘要： A controller for controlling power to a light source includes a first sensing pin, a second sensing pin, a third sensing pin, and a driving pin. The first sensing pin receives a first signal indicating an instant current flowing through an energy storage element. The second sensing pin receives a second signal indicating an average current flowing through the energy storage element. The third sensing pin receives a third signal indicating whether the instant current decreases to a predetermined current level. The driving pin provides a driving signal to a switch to control an average current flowing through the light source to a target current level. The driving signal is generated based on one or more signals selected from the first signal, the second signal and the third signal.

摘要翻译： 用于控制光源的功率的控制器包括第一感测针，第二感测针，第三感测针和驱动针。 第一感测引脚接收指示流过能量存储元件的瞬时电流的第一信号。 第二感测针接收指示流过能量存储元件的平均电流的第二信号。 第三感测针接收指示瞬时电流是否降低到预定电流电平的第三信号。 驱动引脚向开关提供驱动信号，以将流过光源的平均电流控制到目标电流水平。 基于从第一信号，第二信号和第三信号中选择的一个或多个信号产生驱动信号。

公开(公告)号：US20130038227A1

公开(公告)日：2013-02-14

申请号：US13369620

申请日：2012-02-09

申请人： Tiesheng YAN ,  Feng LIN ,  Youling LI ,  Ching-Chuan KUO

发明人： Tiesheng YAN ,  Feng LIN ,  Youling LI ,  Ching-Chuan KUO

IPC分类号： H05B37/02

CPC分类号： H05B33/0851 ,  H05B33/0818 ,  H05B33/0848

摘要： A driving circuit for controlling power of a light-emitting diode (LED) light source includes a transformer, a switch controller, and a dimming controller. The transformer has a primary winding that receives input power from an AC/DC converter and a secondary winding that provides output power to the LED light source. The switch controller coupled between an optical coupler and the primary winding receives a feedback signal indicative of a target level of a current flowing through the LED light source from the optical coupler, and controls input power to the primary winding according to the feedback signal. The dimming controller coupled to the secondary winding receives a switch monitoring signal indicative of an operation of a power switch coupled between an AC power source and the AC/DC converter, and regulates the output power by adjusting the feedback signal according to the switch monitoring signal.

摘要翻译： 用于控制发光二极管（LED）光源的功率的驱动电路包括变压器，开关控制器和调光控制器。 变压器具有从AC / DC转换器接收输入功率的初级绕组和向LED光源提供输出功率的次级绕组。 耦合在光耦合器和初级绕组之间的开关控制器接收表示从光耦合器流过LED光源的电流的目标电平的反馈信号，并且根据反馈信号控制到初级绕组的输入功率。 耦合到次级绕组的调光控制器接收指示耦合在AC电源和AC / DC转换器之间的功率开关的操作的开关监视信号，并且通过根据开关监视信号调整反馈信号来调节输出功率 。

公开(公告)号：US08575864B2

公开(公告)日：2013-11-05

申请号：US13556690

申请日：2012-07-24

申请人： Tiesheng Yan ,  Youling Li ,  Feng Lin ,  Xinhe Su ,  Ching-Chuan Kuo

发明人： Tiesheng Yan ,  Youling Li ,  Feng Lin ,  Xinhe Su ,  Ching-Chuan Kuo

IPC分类号： H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  G05F1/00 ,  H05B39/02 ,  H05B41/16 ,  H05B41/24 ,  H05B37/00 ,  H05B39/00 ,  H05B41/00

摘要： A controller for controlling power to a light source includes a first sensing pin, a second sensing pin, a third sensing pin, and a driving pin. The first sensing pin receives a first signal indicating an instant current flowing through an energy storage element. The second sensing pin receives a second signal indicating an average current flowing through the energy storage element. The third sensing pin receives a third signal indicating whether the instant current decreases to a predetermined current level. The driving pin provides a driving signal to a switch to control an average current flowing through the light source to a target current level. The driving signal is generated based on one or more signals selected from the first signal, the second signal and the third signal.

公开(公告)号：US08054001B2

公开(公告)日：2011-11-08

申请号：US11600615

申请日：2006-11-15

申请人： Xiaojun Wang ,  Sheng-Tai Lee ,  Youling Li ,  Da Liu ,  Ru Guo

发明人： Xiaojun Wang ,  Sheng-Tai Lee ,  Youling Li ,  Da Liu ,  Ru Guo

IPC分类号： G05F1/00

CPC分类号： H05B41/2822

摘要： A circuit structure for LCD backlight is disclosed in the present invention. The circuit structure includes an inverter topology, a current balance circuit, and a plurality of loads. The current balance circuit is coupled to the plurality of loads and capable of balancing current of N loads by using N/2−1 balance chokes. The circuit structure may further include a protection circuit which is coupled to the low voltage sides of the plurality of loads. The protection circuit is capable of sensing lamp voltages and providing a feedback signal to a controller. Furthermore, the protection circuit is composed of count-reduced and cost-competitive electronic elements.

摘要翻译： 在本发明中公开了用于LCD背光的电路结构。 电路结构包括逆变器拓扑，电流平衡电路和多个负载。 目前的平衡电路耦合到多个负载，并能够通过使用N / 2-1平衡扼流圈平衡N个负载的电流。 电路结构还可以包括耦合到多个负载的低电压侧的保护电路。 保护电路能够感测灯电压并向控制器提供反馈信号。 此外，保护电路由数量减少和成本竞争的电子元件组成。

公开(公告)号：US20090256490A1

公开(公告)日：2009-10-15

申请号：US12489033

申请日：2009-06-22

申请人： Youling Li ,  Yingpeng Hu ,  Xiaojun Wang

发明人： Youling Li ,  Yingpeng Hu ,  Xiaojun Wang

IPC分类号： H05B41/26 ,  H02M7/44

CPC分类号： G01R15/06 ,  G01R15/16 ,  G09G3/3406 ,  G09G2330/02 ,  G09G2330/026 ,  G09G2330/04 ,  H05B41/2855

摘要： A voltage sensing circuit includes a voltage divider and a voltage rectifier. The voltage divider divides a first output voltage on a first output voltage line to a first divided output voltage. The voltage divider comprises a first metal foil and a first capacitor. The first metal foil and the first output voltage line can form a first capacitive component. The first capacitive component is coupled in series with the first capacitor. The first capacitive component and the first capacitor can generate the first divided output voltage. The voltage rectifier is coupled to the voltage divider and can rectify the first divided output voltage to a sensing voltage indicative of the first output voltage.

摘要翻译： 电压检测电路包括分压器和电压整流器。 分压器将第一输出电压线上的第一输出电压划分为第一分压输出电压。 分压器包括第一金属箔和第一电容器。 第一金属箔和第一输出电压线可以形成第一电容元件。 第一电容分量与第一电容器串联耦合。 第一电容部件和第一电容器可以产生第一分压输出电压。 电压整流器耦合到分压器，并且可以将第一分压输出电压校正为表示第一输出电压的感测电压。

公开(公告)号：US07554319B1

公开(公告)日：2009-06-30

申请号：US12072827

申请日：2008-02-28

申请人： Youling Li ,  Yingpeng Hu ,  Xiaojun Wang

发明人： Youling Li ,  Yingpeng Hu ,  Xiaojun Wang

IPC分类号： G01R13/20

CPC分类号： G01R15/06 ,  G01R15/16 ,  G09G3/3406 ,  G09G2330/02 ,  G09G2330/026 ,  G09G2330/04 ,  H05B41/2855

摘要： A voltage sensing circuit includes a voltage divider and a voltage rectifier. The voltage divider divides a first output voltage on a first output voltage line to a first divided output voltage. The voltage divider comprises a first metal foil and a first capacitor. The first metal foil and the first output voltage line can form a first capacitive component. The first capacitive component is coupled in series with the first capacitor. The first capacitive component and the first capacitor can generate the first divided output voltage. The voltage rectifier is coupled to the voltage divider and can rectify the first divided output voltage to a sensing voltage indicative of the first output voltage.

摘要翻译： 电压检测电路包括分压器和电压整流器。 分压器将第一输出电压线上的第一输出电压划分为第一分压输出电压。 分压器包括第一金属箔和第一电容器。 第一金属箔和第一输出电压线可以形成第一电容元件。 第一电容分量与第一电容器串联耦合。 第一电容部件和第一电容器可以产生第一分压输出电压。 电压整流器耦合到分压器，并且可以将第一分压输出电压校正为表示第一输出电压的感测电压。

公开(公告)号：US09030122B2

公开(公告)日：2015-05-12

申请号：US13369620

申请日：2012-02-09

申请人： Tiesheng Yan ,  Feng Lin ,  Youling Li ,  Ching-Chuan Kuo

发明人： Tiesheng Yan ,  Feng Lin ,  Youling Li ,  Ching-Chuan Kuo

IPC分类号： H05B37/02 ,  H05B33/08

CPC分类号： H05B33/0851 ,  H05B33/0818 ,  H05B33/0848

摘要： A driving circuit for controlling power of a light-emitting diode (LED) light source includes a transformer, a switch controller, and a dimming controller. The transformer has a primary winding that receives input power from an AC/DC converter and a secondary winding that provides output power to the LED light source. The switch controller coupled between an optical coupler and the primary winding receives a feedback signal indicative of a target level of a current flowing through the LED light source from the optical coupler, and controls input power to the primary winding according to the feedback signal. The dimming controller coupled to the secondary winding receives a switch monitoring signal indicative of an operation of a power switch coupled between an AC power source and the AC/DC converter, and regulates the output power by adjusting the feedback signal according to the switch monitoring signal.

摘要翻译： 用于控制发光二极管（LED）光源的功率的驱动电路包括变压器，开关控制器和调光控制器。 变压器具有从AC / DC转换器接收输入功率的初级绕组和向LED光源提供输出功率的次级绕组。 耦合在光耦合器和初级绕组之间的开关控制器接收表示从光耦合器流过LED光源的电流的目标电平的反馈信号，并且根据反馈信号控制到初级绕组的输入功率。 耦合到次级绕组的调光控制器接收指示耦合在AC电源和AC / DC转换器之间的功率开关的操作的开关监视信号，并且通过根据开关监视信号调整反馈信号来调节输出功率 。

公开(公告)号：US08339063B2

公开(公告)日：2012-12-25

申请号：US12761681

申请日：2010-04-16

申请人： Tiesheng Yan ,  Youling Li ,  Feng Lin ,  Xinhe Su ,  Ching-Chuan Kuo

发明人： Tiesheng Yan ,  Youling Li ,  Feng Lin ,  Xinhe Su ,  Ching-Chuan Kuo

IPC分类号： H05B37/02

CPC分类号： H05B37/02 ,  H05B33/0815

摘要： A driving circuit includes a first inductor coupled in series with a light source for providing power to the light source. A controller coupled to the first inductor can control a switch coupled to the first inductor, thereby controlling a current flowing through the first inductor. A current sensor coupled to the first inductor can provide a first signal indicative of the current flowing through the first inductor, regardless of whether the switch is on or off. The switch is controlled according to the first signal. A second inductor magnetically coupled to the first inductor is also electrically coupled to the first inductor via a common node between the switch and the first inductor for providing a reference ground for the controller. The reference ground is different from the ground of the driving circuit.

摘要翻译： 驱动电路包括与用于向光源提供电力的光源串联耦合的第一电感器。 耦合到第一电感器的控制器可以控制耦合到第一电感器的开关，从而控制流过第一电感器的电流。 耦合到第一电感器的电流传感器可以提供指示流过第一电感器的电流的第一信号，而不管开关是开或关。 开关根据第一个信号进行控制。 磁耦合到第一电感器的第二电感器也经由开关和第一电感器之间的公共节点电耦合到第一电感器，以提供用于控制器的参考地。 参考地不同于驱动电路的地面。

公开(公告)号：US08058809B2

公开(公告)日：2011-11-15

申请号：US12215937

申请日：2008-07-01

申请人： Youling Li ,  Sheng Tai Lee ,  Yingpeng Hu

发明人： Youling Li ,  Sheng Tai Lee ,  Yingpeng Hu

IPC分类号： H05B37/00

CPC分类号： H05B41/282 ,  Y02B20/183

摘要： A circuit comprises a power tank, a pair of transformers and multiple loads. The power tank converts a DC input voltage to an AC voltage. The pair of transformers comprise a pair of primary windings and a pair of secondary windings and transform the intermediate AC voltage to an output AC voltage. The pair of primary windings are coupled to the power tank for receiving the intermediate AC voltage, and the pair of secondary windings provide the output AC voltage. The loads are coupled to the pair of secondary windings for receiving the output AC voltage. The pair of secondary windings are serially coupled to each other through the series-coupled loads to achieve current balance among the loads.

摘要翻译： 电路包括电源箱，一对变压器和多个负载。 电源箱将直流输入电压转换为交流电压。 该对变压器包括一对初级绕组和一对次级绕组，并将中间交流电压转换为输出交流电压。 一对初级绕组耦合到电力箱以接收中间AC电压，并且该对次级绕组提供输出AC电压。 负载耦合到一对次级绕组以接收输出AC电压。 一对次级绕组通过串联耦合的负载彼此串联耦合，以实现负载之间的电流平衡。