公开(公告)号：US20060038508A1

公开(公告)日：2006-02-23

申请号：US10923188

申请日：2004-08-20

Applicant: Yung-Lin Lin ,  Da Liu

Inventor： Yung-Lin Lin ,  Da Liu

IPC: H05B41/16

CPC classification number: H05B41/2813 ,  Y02B20/22

Abstract: The present invention provides a protection means for a driving circuit which drives a set of external electrode fluorescent lamps (EEFL). The driving circuit with protection function for driving a set of EEFLs consistent with the present invention includes: a transformer connected to the set of EEFLs; a switching network connected to the transformer which delivers power to the transformer; a sensing circuit connected to the set of EEFLs which detects disconnection if one light source is disconnected; and a controller connected to the switching network which controls the switching network to reduce the total current supplied to the EEFLs which remain connected, if the sensing circuit detects that one EEFL is disconnected. Appropriate protection can therefore be implemented when the EEFL is disconnected on one end or both ends.

Abstract translation: 本发明提供一种用于驱动一组外部电极荧光灯（EEFL）的驱动电路的保护装置。 具有与本发明一致的用于驱动一组EEFL的保护功能的驱动电路包括：连接到该组EEFL的变压器; 连接到向变压器供电的变压器的开关网络; 连接到一组EEFL的感测电路，如果一个光源断开则检测断开; 以及连接到交换网络的控制器，如果感测电路检测到一个EEFL被断开，则控制交换网络以减少提供给保持连接的EEFL的总电流。 因此，当EEFL在一端或两端断开时，可以实现适当的保护。

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.

公开(公告)号：US08044609B2

公开(公告)日：2011-10-25

申请号：US12317977

申请日：2008-12-31

Applicant: Da Liu

Inventor： Da Liu

IPC: H05B37/02 ,  H05B39/00

CPC classification number: H05B33/086

Abstract: A circuit for controlling light sources comprises a converter, a feedback circuit and a current distribution controller. The converter is operable for converting an input voltage to an output current and for providing the output current to the light sources. The feedback circuit is coupled to the light sources for generating feedback signals indicative of currents flowing through the light sources respectively. The current distribution controller is coupled to the feedback circuit for generating control signals based on the feedback signals respectively so as to regulate the currents of the light sources respectively, and for controlling the converter to regulate the output current based on the feedback signals.

Abstract translation: 用于控制光源的电路包括转换器，反馈电路和电流分配控制器。 转换器可操作用于将输入电压转换为输出电流，并将输出电流提供给光源。 反馈电路耦合到光源，用于产生分别表示流过光源的电流的反馈信号。 电流分配控制器耦合到反馈电路，用于分别基于反馈信号产生控制信号，以分别调节光源的电流，并且用于基于反馈信号控制转换器来调节输出电流。

公开(公告)号：US20110221795A1

公开(公告)日：2011-09-15

申请号：US13094384

申请日：2011-04-26

Applicant: Kaiping Ran ,  Da Liu ,  Yung Lin Lin

Inventor： Kaiping Ran ,  Da Liu ,  Yung Lin Lin

IPC: G09G5/10 ,  H05B37/03

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 multiple light emitting diode (LED) strings includes feedback circuitry, phase array circuitry, and encoder circuitry. The feedback circuitry generates multiple feedback signals indicative of currents flowing through the LED strings respectively. The encoder circuitry generates a code signal indicative of a total number of operative LED strings among the multiple LED strings based on the feedback signals. The phase array circuitry generates multiple saw tooth signals according to the code signal. A phase shift amount between two adjacent signals of the saw tooth signals is determined by the total number of the operative LED strings. The phase array circuitry compares each of the saw tooth signals with a dimming control signal to generate multiple phase shift signals so as to respectively control the operative LED strings.

Abstract translation: 用于驱动多个发光二极管（LED）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。 反馈电路分别产生指示流过LED串的电流的多个反馈信号。 编码器电路基于反馈信号产生指示多个LED串中的操作LED串的总数的代码信号。 相位阵列电路根据码信号产生多个锯齿信号。 锯齿信号的两个相邻信号之间的相移量由可操作的LED串的总数确定。 相位阵列电路将每个锯齿信号与调光控制信号进行比较，以产生多个相移信号，以分别控制工作LED串。

公开(公告)号：US07768806B2

公开(公告)日：2010-08-03

申请号：US11637421

申请日：2006-12-11

Applicant: Yung-Lin Lin ,  Da Liu

Inventor： Yung-Lin Lin ,  Da Liu

IPC: H02M7/525

CPC classification number: H02M3/33507 ,  H02M7/48

Abstract: A DC/AC inverter and method thereof are disclosed. The DC/AC inverter for driving a load includes a DC power supply for supplying a DC input voltage, a converter circuit coupled to the DC power supply which converts the DC input voltage into an AC signal used to drive the load, and a control circuit coupled to the converter circuit which sets a frequency of the AC signal. The control circuit is further capable of operating the DC/AC inverter in a fixed frequency mode and in a variable frequency mode in accordance with the DC input voltage and the load condition.

Abstract translation: 公开了一种DC / AC逆变器及其方法。 用于驱动负载的DC / AC逆变器包括用于提供DC输入电压的DC电源，耦合到DC电源的转换器电路，其将DC输入电压转换为用于驱动负载的AC信号，以及控制电路 耦合到设置AC信号的频率的转换器电路。 控制电路还能够根据直流输入电压和负载条件以固定频率模式和变频模式操作DC / AC逆变器。

公开(公告)号：US20100039048A1

公开(公告)日：2010-02-18

申请号：US12229010

申请日：2008-08-18

Applicant: Da Liu ,  ShengTai Lee ,  Youling Li

Inventor： Da Liu ,  ShengTai Lee ,  Youling Li

IPC: H05B37/02

CPC classification number: H05B41/3927 ,  H05B41/2828 ,  Y02B20/186

Abstract: A driving circuit for driving loads includes a switch circuit, a transformer, a current sensing circuit, and an inverter controller. The switch circuit and the transformer are used for converting a DC electric power to an AC electric power so as to energize the loads. The current sensing circuit coupled to the loads generates a feedback current signal indicative of a current flowing through the loads. The inverter controller includes a switch drive circuit, a current regulation circuit receiving the feedback current signal, and a mode controller circuit. The switch drive circuit controls the switch circuit so as to adjust power delivered to the primary winding of the transformer in accordance with the feedback current signal. The mode controller disables the switch circuit through the switch drive circuit if the external signal is in an absence state for a predetermined period.

Abstract translation: 用于驱动负载的驱动电路包括开关电路，变压器，电流感测电路和逆变器控制器。 开关电路和变压器用于将直流电力转换为交流电力以使负载通电。 耦合到负载的电流感测电路产生指示流过负载的电流的反馈电流信号。 逆变器控制器包括开关驱动电路，接收反馈电流信号的电流调节电路和模式控制器电路。 开关驱动电路控制开关电路，以便根据反馈电流信号来调节输送到变压器的初级绕组的功率。 如果外部信号在预定时间段内处于不在状态，则模式控制器通过开关驱动电路来禁止开关电路。

公开(公告)号：US07554273B2

公开(公告)日：2009-06-30

申请号：US11879991

申请日：2007-07-18

Applicant: Yung-Lin Lin ,  Da Liu

Inventor： Yung-Lin Lin ,  Da Liu

IPC: G05F1/00

CPC classification number: H05B41/2855 ,  Y02B20/186 ,  Y10S315/07

Abstract: The present invention provides a driving circuit with protection function for driving a set of external electrode fluorescent lamps (EEFL). The drive circuit includes: a transformer connected to the set of EEFLs; a switching network connected to the transformer which delivers power to the transformer; a sensing circuit connected to the set of EEFLs which detects disconnection if one light source is disconnected; and a controller connected to the switching network which controls the switching network to reduce the total current supplied to the EEFLs which remain connected, if the sensing circuit detects that one EEFL is disconnected. Appropriate protection can therefore be implemented when the EEFL is disconnected on one end or both ends.

Abstract translation: 本发明提供一种具有用于驱动一组外部电极荧光灯（EEFL）的保护功能的驱动电路。 驱动电路包括：连接到该组EEFL的变压器; 连接到向变压器供电的变压器的开关网络; 连接到一组EEFL的感测电路，如果一个光源断开则检测断开; 以及连接到交换网络的控制器，如果感测电路检测到一个EEFL被断开，则控制交换网络以减少提供给保持连接的EEFL的总电流。 因此，当EEFL在一端或两端断开时，可以实现适当的保护。