公开(公告)号：US08049438B2

公开(公告)日：2011-11-01

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: G05F1/00 ,  H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  H05B37/00 ,  H05B39/00 ,  H05B41/00 ,  H05B41/14

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：US07911463B2

公开(公告)日：2011-03-22

申请号：US11216912

申请日：2005-08-31

Applicant: Yung-Lin Lin ,  Da Liu

Inventor： Yung-Lin Lin ,  Da Liu

IPC: G09G5/00

CPC classification number: H02M1/42 ,  H05B41/282 ,  Y02B20/183 ,  Y02B70/12

Abstract: A method according to one embodiment may include generating, by a controller, a plurality of control signals to control operations of inverter circuitry to generate an AC signal from a DC signal. The method of this embodiment may also include using the control signals generated by the controller to also control operations of power factor correction (PFC) circuitry, via the inverter circuitry, to enable the PFC circuitry to generate power factor correction of an input source coupled to the PFC circuitry and the inverter circuitry. 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由控制器产生多个控制信号以控制逆变器电路的操作以从DC信号产生AC信号。 该实施例的方法还可以包括使用由控制器产生的控制信号也经由逆变器电路来控制功率因数校正（PFC）电路的操作，以使PFC电路能够产生耦合到 PFC电路和逆变器电路。 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：US07888889B2

公开(公告)日：2011-02-15

申请号：US12490976

申请日：2009-06-24

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 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：US07394209B2

公开(公告)日：2008-07-01

申请号：US10870750

申请日：2004-06-16

Applicant: Yung-Lin Lin ,  Da Liu

Inventor： Yung-Lin Lin ,  Da Liu

IPC: H05B37/02

CPC classification number: H02M3/3376 ,  H05B41/2828 ,  H05B41/2855 ,  Y02B20/185 ,  Y02B70/1433

Abstract: A liquid crystal display system and CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.

Abstract translation: 使用消除与功率MOSFET相关的开关损耗的高效率零电压切换技术来提供液晶显示系统和CCFL功率转换器电路。 通过考虑谐振回路中的寄生电容，在CCFL点火中使用最佳的扫频技术。 此外，电路是自学习的，并且适于确定具有给定负载的电路的最佳工作频率。 也可以提供过电压保护电路，以确保在开灯状态下保护电路部件。

公开(公告)号：US20080067944A1

公开(公告)日：2008-03-20

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: H05B37/02 ,  H02H9/00

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：US20070080911A1

公开(公告)日：2007-04-12

申请号：US11247831

申请日：2005-10-11

Applicant: Da Liu ,  Yung-Lin Lin

Inventor： Da Liu ,  Yung-Lin Lin

IPC: G09G3/32

CPC classification number: H05B33/0827 ,  G09G3/3413 ,  G09G3/342 ,  G09G2320/0233 ,  G09G2320/0633 ,  G09G2320/0666 ,  G09G2330/021 ,  H05B33/0815

Abstract: A method according to one embodiment may include supplying power to an LED array having at least a first string of LEDs and a second string of LEDs coupled in parallel, each of the strings includes at least two LEDs. The method of this embodiment may also include comparing a first feedback signal from the first string of LEDs and a second feedback signal from the second string of LEDs. The first feedback signal is proportional to current in said first string of LEDs and said second feedback signal is proportional to current in said second string of LEDs. The method of this embodiment may also include controlling a voltage drop of at least the first string of LEDs to adjust the current of the first string of LEDs relative to the second string of LEDs, based on, at least in part, the comparing of the first and second feedback signals. 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具有至少第一串LED串的LED阵列供电，并且并联耦合的第二串LED串联，每个串包括至少两个LED。 该实施例的方法还可以包括比较来自第一串LED的第一反馈信号和来自第二LED串的第二反馈信号。 所述第一反馈信号与所述第一串LED中的电流成比例，并且所述第二反馈信号与所述第二LED串中的电流成比例。 该实施例的方法还可以包括：至少部分地基于对第一串LED的比较来控制至少第一串LED的电压降以调节第一LED串相对于第二LED串的电流 第一和第二反馈信号。 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：US20070046217A1

公开(公告)日：2007-03-01

申请号：US11216650

申请日：2005-08-31

Applicant: Da Liu

Inventor： Da Liu

IPC: H05B41/36

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.

公开(公告)号：US07120035B2

公开(公告)日：2006-10-10

申请号：US10690103

申请日：2003-10-21

Applicant: Yung-Lin Lin ,  Da Liu

Inventor： Yung-Lin Lin ,  Da Liu

IPC: H02M3/335

CPC classification number: H05B41/2824 ,  H02M7/53806 ,  H05B41/3927 ,  Y02B20/186 ,  Y10S323/905

Abstract: An integrated circuit inverter controller that includes at least one input pin that is configured to receive two or more input signals. The input pin may be multiplexed so that the appropriate input signal is directed to appropriate circuitry within the controller to support two or more functions of the controller. Alternatively, the input signals may be present in differing time periods so that a single pin can support two or more functions. Multifunctional or multitasked pins reduce the overall pin count of the inverter controller.

公开(公告)号：US20050212790A1

公开(公告)日：2005-09-29

申请号：US11111642

申请日：2005-04-21

Applicant: Yung-Lin Lin ,  Da Liu

Inventor： Yung-Lin Lin ,  Da Liu

IPC: H05B41/282 ,  H05B41/392 ,  H02M7/538

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.

公开(公告)号：US20050174818A1

公开(公告)日：2005-08-11

申请号：US10870750

申请日：2004-06-16

Applicant: Yung-Lin Lin ,  Da Liu

Inventor： Yung-Lin Lin ,  Da Liu

IPC: H02M3/24 ,  H02M3/337 ,  H05B41/282 ,  H05B41/285

CPC classification number: H02M3/3376 ,  H05B41/2828 ,  H05B41/2855 ,  Y02B20/185 ,  Y02B70/1433

Abstract: A liquid crystal display system and CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.

Abstract translation: 使用消除与功率MOSFET相关的开关损耗的高效率零电压切换技术来提供液晶显示系统和CCFL功率转换器电路。 通过考虑谐振回路中的寄生电容，在CCFL点火中使用最佳的扫频技术。 此外，电路是自学习的，并且适于确定具有给定负载的电路的最佳工作频率。 也可以提供过电压保护电路，以确保在开灯状态下保护电路部件。