公开(公告)号：US20050206330A1

公开(公告)日：2005-09-22

申请号：US11130003

申请日：2005-05-16

Applicant: Virgil Gheorghiu ,  Da Liu

Inventor： Virgil Gheorghiu ,  Da Liu

IPC: H01J29/76

CPC classification number: H02M3/158 ,  H02M3/33569

Abstract: The present invention provides an inverter controller comprising a drive circuit that generates a plurality of switch drive signals for inverter applications. In some exemplary embodiments, the drive circuit operates by reversing the command level of an error signal. In other embodiments, the drive circuit operates by using a half period of a sawtooth signal. In still other embodiments, the drive circuit operates by using a double period opposite shifting pulses method. The present invention also provides a PWM signal generator circuit that generates periodic PWM switch drive signals symmetrical to the minimum or maximum of a sawtooth waveform.

Abstract translation: 本发明提供了一种逆变器控制器，其包括产生用于逆变器应用的多个开关驱动信号的驱动电路。 在一些示例性实施例中，驱动电路通过反转误差信号的命令电平来操作。 在其他实施例中，驱动电路通过使用锯齿波信号的半周期来操作。 在其他实施例中，驱动电路通过使用双周期相反的移位脉冲方法进行操作。 本发明还提供一种PWM信号发生器电路，其生成与锯齿波形的最小或最大对称的周期性PWM开关驱动信号。

公开(公告)号：US08711119B2

公开(公告)日：2014-04-29

申请号：US13438760

申请日：2012-04-03

Applicant: Da Liu ,  Horia Udrea Spenea

Inventor： Da Liu ,  Horia Udrea Spenea

IPC: G06F3/041 ,  G09G3/36

CPC classification number: G06F3/0416

Abstract: A display system includes a touch screen and a driving circuit. The touch screen includes touch sensors and a light source. A converter of the driving circuit receives an input voltage and provides a first output voltage to the light source according to a driving signal. A controller of the driving circuit converts the first output voltage to a second output voltage to drive the touch sensors, compares a voltage feedback signal indicating whether the second output voltage reaches a desired voltage level with a current feedback signal indicating whether a current through the light source reaches a desired current level, selects a feedback signal from the voltage feedback signal and the current feedback signal according to the comparison, and generates the driving signal to adjust the first output voltage according to the selected feedback signal.

Abstract translation: 显示系统包括触摸屏和驱动电路。 触摸屏包括触摸传感器和光源。 驱动电路的转换器接收输入电压，并根据驱动信号向光源提供第一输出电压。 驱动电路的控制器将第一输出电压转换为第二输出电压以驱动触摸传感器，将指示第二输出电压是否达到期望电压电平的电压反馈信号与指示是否通过光的电流的电流反馈信号进行比较 源达到所需电流水平，根据比较从电压反馈信号和电流反馈信号中选择反馈信号，并根据所选择的反馈信号产生驱动信号以调整第一输出电压。

公开(公告)号：US08237379B2

公开(公告)日：2012-08-07

申请号：US13228241

申请日：2011-09-08

Applicant: Da Liu

Inventor： Da Liu

IPC: H05B37/02

CPC classification number: H05B33/0827 ,  G09G3/3406 ,  H05B33/0815 ,  H05B33/0848

Abstract: A controller for regulating a current through a light-emitting diode (LED) light source includes a first reference pin for receiving a first reference signal indicative of a target average level, and a dimming control pin for receiving a dimming signal. The controller regulates an average level of the current to the target average level. The current is regulated according to the first reference signal and a ramp signal if the dimming signal has a first level. The ramp signal is synchronized with the dimming signal. The current is cut off if the dimming signal has a second level.

Abstract translation: 用于调节通过发光二极管（LED）光源的电流的控制器包括用于接收指示目标平均电平的第一参考信号的第一参考引脚和用于接收调光信号的调光控制引脚。 控制器将当前平均水平调节至目标平均水平。 如果调光信号具有第一电平，则根据第一参考信号和斜坡信号调节电流。 斜坡信号与调光信号同步。 如果调光信号具有第二电平，则电流被切断。

公开(公告)号：US08054001B2

公开(公告)日：2011-11-08

申请号：US11600615

申请日：2006-11-15

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

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

IPC: G05F1/00

CPC classification number: H05B41/2822

Abstract: 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.

Abstract translation: 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：US20100320934A1

公开(公告)日：2010-12-23

申请号：US12817388

申请日：2010-06-17

Applicant: Da Liu ,  Ching-Chuan Kuo ,  Sheng-Tai Lee

Inventor： Da Liu ,  Ching-Chuan Kuo ,  Sheng-Tai Lee

IPC: H05B41/36 ,  G05F5/00

CPC classification number: H02M1/4258 ,  H05B33/0815 ,  Y02B70/126

Abstract: A circuit for driving a load includes a power line, converter circuitry, and a controller. The power line is operable for providing an input current and an input voltage. The converter circuitry coupled to the power line is operable for converting the input voltage to a regulated voltage to drive the load, and for providing a current detection signal indicating whether a converter current flowing through the converter circuitry drops to a predetermined level. The controller coupled to the converter circuitry is operable for correcting a power factor of the circuit based on the current detection signal and the input voltage such that a waveform of the input current follows a waveform of the input voltage.

Abstract translation: 用于驱动负载的电路包括电力线，转换器电路和控制器。 电力线可操作用于提供输入电流和输入电压。 耦合到电力线的转换器电路可操作用于将输入电压转换为调节电压以驱动负载，并且用于提供指示流过转换器电路的转换器电流是否下降到预定电平的电流检测信号。 耦合到转换器电路的控制器可操作用于基于电流检测信号和输入电压校正电路的功率因数，使得输入电流的波形遵循输入电压的波形。

公开(公告)号：US07253569B2

公开(公告)日：2007-08-07

申请号：US11216650

申请日：2005-08-31

Applicant: Da Liu

Inventor： Da Liu

IPC: G05F1/00

CPC classification number: H05B41/2824 ,  Y10S315/07

Abstract: A method according to one embodiment may include supplying power to plurality of External Electrode Fluorescent Lamps (EEFLs). The method of this embodiment may also include generating signals proportional to the voltage of each EEFL. The method of this embodiment may also include generating a feedback signal indicative of the state of one or more of the plurality of EEFLs based on, at least in part, the value of at least one signal proportional to the voltage of each EEFL. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.

Abstract translation: 根据一个实施例的方法可以包括向多个外部电极荧光灯（EEFL）供电。 该实施例的方法还可以包括产生与每个EEFL的电压成比例的信号。 该实施例的方法还可以包括至少部分地基于与每个EEFL的电压成比例的至少一个信号的值来产生指示多个EEFL中的一个或多个的状态的反馈信号。 当然，在不偏离本实施例的情况下，可以进行许多替代，变化和修改。

公开(公告)号：USD1069321S1

公开(公告)日：2025-04-08

申请号：US29972692

申请日：2024-11-12

Applicant: Da Liu

Designer： Da Liu

公开(公告)号：US08587221B2

公开(公告)日：2013-11-19

申请号：US13331265

申请日：2011-12-20

Applicant: Da Liu

Inventor： Da Liu

IPC: G05F1/00

CPC classification number: H02M3/33561 ,  H05B33/0809 ,  H05B33/0815 ,  H05B33/0824 ,  Y02B20/346

Abstract: Embodiments of the invention provide a DC/DC converter. The DC/DC converter includes a transformer, a switch controller and a driver controller. The transformer has a primary winding coupled to a power source, a first secondary winding provides a first output voltage to a first load, and a second secondary winding provides a second output voltage to a second load. The switch controller is coupled to the primary winding and controls a first switch coupled to the primary winding to control input power to the primary winding and to regulate the first output voltage based on a power requirement of the first load. The driver controller is coupled to the second secondary winding and generates a pulse modulation signal to alternately turn on and turn off a second switch coupled to the second secondary winding to regulate the second output voltage based on a power requirement of the second load.

Abstract translation: 本发明的实施例提供一种DC / DC转换器。 DC / DC转换器包括变压器，开关控制器和驱动器控制器。 变压器具有耦合到电源的初级绕组，第一次级绕组向第一负载提供第一输出电压，而第二次级绕组向第二负载提供第二输出电压。 开关控制器耦合到初级绕组并且控制耦合到初级绕组的第一开关以控制到初级绕组的输入功率并且基于第一负载的功率需求来调节第一输出电压。 驱动器控制器耦合到第二次级绕组，并且产生脉冲调制信号以交替地接通和关断耦合到第二次级绕组的第二开关，以基于第二负载的功率需求来调节第二输出电压。

公开(公告)号：US08456101B2

公开(公告)日：2013-06-04

申请号：US12757239

申请日：2010-04-09

Applicant: Yi-Ren Wang ,  Sheng-Tai Lee ,  Da Liu ,  Chuan-Chiung Kuo

Inventor： Yi-Ren Wang ,  Sheng-Tai Lee ,  Da Liu ,  Chuan-Chiung Kuo

IPC: G05F1/00

CPC classification number: H05K1/141 ,  H05K3/3447 ,  H05K2201/10166

Abstract: A power system includes a switching circuit, a resonant tank, a feedback circuit, and controller circuitry. The switching circuit including a first switch and a second switch provides a first AC signal. The resonant tank coupled to the switching circuit receives the first AC signal and generating a second AC signal for powering a load. The feedback circuit coupled to the load monitors an electrical condition of the load and provides a feedback signal. The controller circuitry coupled to the converter controls the switching circuit according to the feedback signal so as to control the power to the load. The controller circuitry is integrated in a first die. The first switch is integrated in a second die, and the second switch is integrated in a third die. The first die, said second die and said third die are mounted on and electrically interconnected to a platform compatible with through-hole technology. The platform and the resonant tank are further assembled on a printed circuit board.

Abstract translation: 电力系统包括开关电路，谐振箱，反馈电路和控制器电路。 包括第一开关和第二开关的开关电路提供第一AC信号。 耦合到开关电路的谐振槽接收第一AC信号并产生用于给负载供电的第二AC信号。 耦合到负载的反馈电路监视负载的电气状态并提供反馈信号。 耦合到转换器的控制器电路根据反馈信号控制开关电路，以便控制负载的功率。 控制器电路集成在第一管芯中。 第一开关集成在第二管芯中，第二开关集成在第三管芯中。 第一模具，所述第二模具和所述第三模具安装在与通孔技术兼容的平台上并电互连。 平台和谐振槽进一步组装在印刷电路板上。

公开(公告)号：US08198833B2

公开(公告)日：2012-06-12

申请号：US13086822

申请日：2011-04-14

Applicant: Da Liu

Inventor： Da Liu

IPC: H05B37/02

Abstract: A driving circuit for powering a plurality of light-emitting diode (LED) light sources includes a power converter and a plurality of current balance controllers. The power converter receives an input voltage and provides a regulated voltage to the LED light sources. The current balance controllers coupled to the power converter control a plurality of currents through the LED light sources respectively. The current balance controllers receive a first reference signal indicative of a target average level and a second reference signal indicative of a maximum transient level, and regulate an average current of each of the currents to the target average level and a transient level of each of the currents within the maximum transient level.