公开(公告)号：US20120032613A1

公开(公告)日：2012-02-09

申请号：US13274663

申请日：2011-10-17

Applicant: Da LIU ,  Yung Lin LIN

Inventor： Da LIU ,  Yung Lin LIN

IPC: H05B37/02

CPC classification number: H05B33/0815 ,  G09G3/3406 ,  G09G2330/028 ,  H05B33/0827 ,  H05B33/0848

Abstract: A driving circuit for powering a light-emitting diode (LED) light source includes a converter circuit, an energy storage element and a switch element. The converter circuit provides a first output voltage on a first power line to provide power to the LED light source and provides a second output voltage on a second power line that is less than the first output voltage. The energy storage element is charged and discharged to regulate a current through the LED light source. The switch element operates in a first state during which the energy storage element is charged and operates in a second state during which the energy storage element is discharged. The converter circuit provides the second output voltage to maintain an operating voltage across the switch element less than the first output voltage during both the first state and the second state.

Abstract translation: 用于对发光二极管（LED）光源供电的驱动电路包括转换器电路，能量存储元件和开关元件。 转换器电路在第一电力线上提供第一输出电压以向LED光源提供电力，并且在小于第一输出电压的第二电力线上提供第二输出电压。 储能元件被充放电以调节通过LED光源的电流。 开关元件工作在第一状态，在该状态期间，能量存储元件被充电并且在能量存储元件被放电的第二状态下操作。 在第一状态和第二状态期间，转换器电路提供第二输出电压以保持开关元件两端的工作电压小于第一输出电压。

公开(公告)号：US20110062869A1

公开(公告)日：2011-03-17

申请号：US12561483

申请日：2009-09-17

Applicant: Cheng-Wei HSU ,  Da LIU ,  ShengTai LEE ,  Yung Lin LIN

Inventor： Cheng-Wei HSU ,  Da LIU ,  ShengTai LEE ,  Yung Lin LIN

IPC: B60Q1/00 ,  G01R31/00

CPC classification number: B60Q11/005 ,  H05B33/089 ,  H05B33/0893 ,  Y02B20/383

Abstract: A circuit for driving a vehicle lamp includes a current path coupled between a power line and ground, and a monitoring unit coupled to the power line. The current path includes a dummy load. The monitoring unit can monitor a testing signal applied to the power line. The testing signal can test whether the vehicle lamp operates properly. The monitoring unit can conduct the current path to enable a current to flow through the dummy load to ground to decrease a total resistance of the circuit if the testing signal is detected.

Abstract translation: 用于驱动车辆灯的电路包括耦合在电力线和地之间的电流路径以及耦合到电力线的监视单元。 当前路径包括虚拟负载。 监控单元可以监控施加到电源线的测试信号。 测试信号可以测试车灯是否正常工作。 如果检测到测试信号，监控单元可以传导电流路径，使得电流能够通过虚拟负载流到地，以减小电路的总电阻。

公开(公告)号：US20090225020A1

公开(公告)日：2009-09-10

申请号：US12075021

申请日：2008-03-07

Applicant: Kaiping RAN ,  Da LIU ,  Yung-Lin LIN

Inventor： Kaiping RAN ,  Da LIU ,  Yung-Lin LIN

IPC: G09G3/36 ,  H05B37/02

CPC classification number: H05B33/0851 ,  G09G3/3406 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2320/0633 ,  G09G2320/064 ,  G09G2330/06 ,  H05B33/0818 ,  H05B33/0827 ,  Y02B20/346

Abstract: A backlight controller for driving a plurality of light source strings includes a feedback circuitry, a phase array circuitry, and an encoder circuitry. The feedback circuitry is coupled to the plurality of light source strings and generates a plurality of feedback signals indicative of a plurality of currents flowing through the plurality of light source strings respectively. The phase array circuitry receives a dimming control signal and receives a code signal indicative of a total number of operative light source strings among the plurality of light source strings, and generates a plurality of phase shift signals according to the code signal and the dimming control signal. The encoder circuitry is coupled to the phase array circuitry and receives the plurality of phase shift signals and the plurality of feedback signals, and generates a plurality of pulse width modulation signals to respectively control the operative light source strings.

Abstract translation: 用于驱动多个光源串的背光控制器包括反馈电路，相位阵列电路和编码器电路。 反馈电路耦合到多个光源串，并且产生分别表示流过多个光源串的多个电流的多个反馈信号。 相位阵列电路接收调光控制信号并接收指示多个光源串中的操作光源串的总数的代码信号，并根据代码信号和调光控制信号产生多个相移信号 。 编码器电路耦合到相位阵列电路并且接收多个相移信号和多个反馈信号，并且产生多个脉冲宽度调制信号以分别控制操作光源串。

公开(公告)号：US20120153866A1

公开(公告)日：2012-06-21

申请号：US13331265

申请日：2011-12-20

Applicant: Da LIU

Inventor： Da LIU

IPC: H05B37/02 ,  H02M3/335

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：US20120091816A1

公开(公告)日：2012-04-19

申请号：US13289364

申请日：2011-11-04

Applicant: Da LIU ,  Sheng-Tai LEE ,  Ju-Yuan HSIAO ,  Chang-Yi LIN

Inventor： Da LIU ,  Sheng-Tai LEE ,  Ju-Yuan HSIAO ,  Chang-Yi LIN

IPC: H02J7/00

CPC classification number: H02J7/022 ,  H02J7/0068 ,  H02M3/158 ,  H05B33/0809 ,  Y10T307/696

Abstract: In one embodiment, a power system includes a first power source having a first voltage, a second power source having a second voltage, and a controller. The controller is coupled to the first power source and the second power source. The controller compares the first voltage with the second voltage, controls the first power source to charge the second power source via a first switch and a second switch in a charging mode when the first voltage is greater than said second voltage, and controls the second power source to power a load such as a light-emitting diode (LED) light source via the second switch and a third switch in a load-powering mode when the second voltage is greater than the first voltage.

Abstract translation: 在一个实施例中，电力系统包括具有第一电压的第一电源，具有第二电压的第二电源和控制器。 控制器耦合到第一电源和第二电源。 控制器将第一电压与第二电压进行比较，当第一电压大于所述第二电压时，控制第一电源经由第一开关和第二开关以充电模式对第二电源充电，并且控制第二电源 源极，当第二电压大于第一电压时，经由第二开关和负载供电模式中的第三开关对诸如发光二极管（LED）光源的负载供电。

公开(公告)号：US20100264844A1

公开(公告)日：2010-10-21

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: H05B41/36 ,  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：US20110316447A1

公开(公告)日：2011-12-29

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：US20130257754A1

公开(公告)日：2013-10-03

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

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：US20110248648A1

公开(公告)日：2011-10-13

申请号：US13086822

申请日：2011-04-14

Applicant: Da LIU

Inventor： Da LIU

IPC: H05B37/02 ,  H05B41/16

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

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.

Abstract translation: 用于对多个发光二极管（LED）光源供电的驱动电路包括功率转换器和多个电流平衡控制器。 电源转换器接收输入电压并向LED光源提供调节电压。 耦合到功率转换器的电流平衡控制器分别控制通过LED光源的多个电流。 当前平衡控制器接收指示目标平均电平的第一参考信号和指示最大瞬态电平的第二参考信号，并且将每个电流的平均电流调节到目标平均电平和每个电流的瞬时电平 最大瞬态电平内的电流。

公开(公告)号：US20110109248A1

公开(公告)日：2011-05-12

申请号：US12973460

申请日：2010-12-20

Applicant: Da LIU

Inventor： Da LIU

IPC: H05B37/02 ,  H02M3/335

CPC classification number: H02M3/33561 ,  H05B33/0809 ,  H05B33/0815

Abstract: Embodiments of the invention provided a DC/DC converter. The DC/DC converter includes a transformer, a first controller and a first switch. The transformer has a primary winding coupled to a power source, a first secondary winding for providing a first output voltage and a second secondary winding for providing a second output voltage. The first controller is coupled to the primary winding for controlling input power to the primary winding to regulate the first output voltage. The switch is coupled to the second secondary winding and for regulating the second output voltage. The first switch is controlled by a pulse modulation signal. A current flows through the second secondary winding if the pulse modulation signal is in the first state, and the current flowing through the second secondary winding remains cut-off if the pulse modulation signal is in the second state.

Abstract translation: 本发明的实施例提供了一种DC / DC转换器。 DC / DC转换器包括变压器，第一控制器和第一开关。 变压器具有耦合到电源的初级绕组，用于提供第一输出电压的第一次级绕组和用于提供第二输出电压的第二次级绕组。 第一控制器耦合到初级绕组，用于控制初级绕组的输入功率以调节第一输出电压。 开关耦合到第二次级绕组并用于调节第二输出电压。 第一开关由脉冲调制信号控制。 如果脉冲调制信号处于第一状态，则电流流过第二次级绕组，如果脉冲调制信号处于第二状态，则流过第二次级绕组的电流保持截止。