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：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。

公开(公告)号：US20090039796A1

公开(公告)日：2009-02-12

申请号：US12209842

申请日：2008-09-12

Applicant: Yung-Lin Lin ,  Da Liu

Inventor： Yung-Lin Lin ,  Da Liu

IPC: H05B41/36

CPC classification number: H05B41/282 ,  H05B41/2827 ,  H05B41/2828 ,  H05B41/3921 ,  Y02B20/183

Abstract: A power supply system is provided for a multiple lamp LCD panel. In one aspect, the power supply includes a plurality of transformers for driving a plurality of respective CCFLs. The primary sides of each transformer are coupled in series to thereby reduce the stress on each transformer. For LCD panels that include longer CCFLs, a power supply is provided that includes a plurality of transformers for driving a plurality of respective CCFLs. The primary sides of each transformer are coupled in series and each lamp is coupled to two secondary sides of the transformers, thereby reducing the problems associated with longer CCFL tubes. In any of the embodiments, the power supply can be adapted to convert a high voltage DC signal to high voltage AC used to power the lamps.

Abstract translation: 为多灯LCD面板提供电源系统。 一方面，电源包括用于驱动多个相应CCFL的多个变压器。 每个变压器的初级侧串联耦合，从而减小每个变压器的应力。 对于包括较长CCFL的LCD面板，提供了包括用于驱动多个相应CCFL的多个变压器的电源。 每个变压器的主要侧面串联耦合，并且每个灯耦合到变压器的两个次级侧，从而减少与较长CCFL管相关联的问题。 在任何实施例中，电源可以适于将高压DC信号转换成用于为灯供电的高压AC。

公开(公告)号：US06936975B2

公开(公告)日：2005-08-30

申请号：US10414374

申请日：2003-04-15

Applicant: Yung-Lin Lin ,  Da Liu

Inventor： Yung-Lin Lin ,  Da Liu

IPC: H05B41/282 ,  H05B41/392 ,  H05B37/00

CPC classification number: H05B41/282 ,  H05B41/2827 ,  H05B41/2828 ,  H05B41/3921 ,  Y02B20/183

Abstract: A power supply system is provided for a multiple lamp LCD panel. In one aspect, the power supply includes a plurality of transformers for driving a plurality of respective CCFLs. The primary sides of each transformer are coupled in series to thereby reduce the stress on each transformer. For LCD panels that include longer CCFLs, a power supply is provided that includes a plurality of transformers for driving a plurality of respective CCFLs. The primary sides of each transformer are coupled in series and each lamp is coupled to two secondary sides of the transformers, thereby reducing the problems associated with longer CCFL tubes. In any of the embodiments, the power supply can be adapted to convert a high voltage DC signal to high voltage AC used to power the lamps.

Abstract translation: 为多灯LCD面板提供电源系统。 一方面，电源包括用于驱动多个相应CCFL的多个变压器。 每个变压器的初级侧串联耦合，从而减小每个变压器的应力。 对于包括较长CCFL的LCD面板，提供了包括用于驱动多个相应CCFL的多个变压器的电源。 每个变压器的主要侧面串联耦合，并且每个灯耦合到变压器的两个次级侧，从而减少与较长CCFL管相关联的问题。 在任何实施例中，电源可以适于将高压DC信号转换成用于为灯供电的高压AC。

公开(公告)号：US08531123B2

公开(公告)日：2013-09-10

申请号：US12973460

申请日：2010-12-20

Applicant: Da Liu

Inventor： Da Liu

IPC: H05B41/16

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。

公开(公告)号：US08253352B2

公开(公告)日：2012-08-28

申请号：US13086822

申请日：2011-04-14

Applicant: Da Liu

Inventor： Da Liu

IPC: H05B37/02

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：US20100164403A1

公开(公告)日：2010-07-01

申请号：US12317977

申请日：2008-12-31

Applicant: Da Liu

Inventor： Da Liu

IPC: H05B37/02

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：US07151394B2

公开(公告)日：2006-12-19

申请号：US11130003

申请日：2005-05-16

Applicant: Virgil Ioan Gheorghiu ,  Da Liu

Inventor： Virgil Ioan Gheorghiu ,  Da Liu

IPC: H03K5/04

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：US07075245B2

公开(公告)日：2006-07-11

申请号：US10898421

申请日：2004-07-22

Applicant: Da Liu

Inventor： Da Liu

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

CPC classification number: H05B41/282 ,  H05B41/2827 ,  H05B41/2828 ,  H05B41/3921 ,  Y02B20/183

Abstract: The present invention provides a driving circuit for driving a light source. The driving circuit includes a serial-arranged transformers system having multiple primary windings and secondary windings; a first switch conducting current though a first path and a second switch conducting current though a second path. The first path is a first set of primary windings connected in series and the second path is a second set of primary windings connected in series and the first set of primary transformer windings and the second set of primary transformer windings form the dual primary windings of the transformers respectively. Based on the conduction of each switch, a DC voltage source supplies power to the primary windings of the transformers, which in turn powers on the light source connected to the secondary windings of the transformers.

公开(公告)号：US08143800B2

公开(公告)日：2012-03-27

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: H05B37/02

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。