公开(公告)号：US08072153B2

公开(公告)日：2011-12-06

申请号：US13004293

申请日：2011-01-11

Applicant: Jing-Meng Liu

Inventor： Jing-Meng Liu

IPC: H05B37/00

CPC classification number: H05B33/0866 ,  H05B33/0827 ,  H05B33/086

Abstract: The present invention discloses a multi-color backlight control circuit, comprising: a plurality of pins for electrically connecting with a plurality of LED strings of different LED colors; and a voltage supply circuit for receiving an input voltage and supplying a single output voltage to the plurality of LED strings of different LED colors. The present invention also discloses a multi-color backlight control method, comprising: supplying a single output voltage to a plurality of LED strings of different LED colors.

Abstract translation: 本发明公开了一种多色背光控制电路，包括：多个引脚，用于与多个不同LED颜色的LED串电连接; 以及电压供给电路，用于接收输入电压并将单个输出电压提供给具有不同LED颜色的多个LED串。 本发明还公开了一种多色背光控制方法，包括：将单个输出电压提供给不同LED颜色的多个LED串。

公开(公告)号：US07839667B2

公开(公告)日：2010-11-23

申请号：US12071727

申请日：2008-02-26

Applicant: Chia-Wei Liao ,  Jing-Meng Liu ,  Jwin-Yen Guo

Inventor： Chia-Wei Liao ,  Jing-Meng Liu ,  Jwin-Yen Guo

IPC: H02M3/24

CPC classification number: H02M3/156 ,  H02M2001/0009

Abstract: In an adaptive leading-edge blanking circuit and method for a switching mode power converter, an inductor current of the converter is sensed and compared with a threshold to decide an end point of a leading-edge blanking time. Circuit and method are further provided for preventing the converter from entering pulse skipping mode, which employs a current trimming circuit in an oscillator for a PWM controller in the converter to reduce a charging current in the oscillator if the output voltage of the converter is excessively high, to thereby reduce the oscillator frequency and in turn lower the switching frequency of a high-side power switch of the converter.

Abstract translation: 在用于开关模式功率转换器的自适应前沿消隐电路和方法中，感测转换器的电感器电流并将其与阈值进行比较以决定前沿消隐时间的终点。 进一步提供电路和方法，用于防止转换器进入脉冲跳跃模式，其在转换器中的PWM控制器的振荡器中采用电流微调电路，以在转换器的输出电压过高时降低振荡器中的充电电流 ，从而降低振荡器频率，从而降低转换器的高侧功率开关的开关频率。

公开(公告)号：US07838900B2

公开(公告)日：2010-11-23

申请号：US12385718

申请日：2009-04-17

Applicant: Liang-Pin Tai ,  Jing-Meng Liu ,  Hung-Der Su

Inventor： Liang-Pin Tai ,  Jing-Meng Liu ,  Hung-Der Su

IPC: H01L29/74 ,  H01L31/111

CPC classification number: H01L27/098 ,  H01L27/0744 ,  H01L29/7722 ,  H01L29/8083

Abstract: A single-chip common-drain JFET device comprises a Drain, two gates and two source arranged such that two common-drain JFETs are formed therewith. Due to the two JFETs merged within a single chip, no wire bonding connection is needed therebetween, thereby without parasitic inductance and resistance caused by bonding wire, and therefore improving the performance and reducing the package cost. The single-chip common-drain JFET device may be applied in buck converter, boost converter, inverting converter, switch, and two-step DC-to-DC converter to improve their performance and efficiency. Alternative single-chip common-drain JFET devices are also provided for current sense or proportional current generation.

Abstract translation: 单芯片公共漏极JFET器件包括漏极，两个栅极和两个源极，使得与其形成两个公共漏极JFET。 由于在单个芯片内合并的两个JFET，其间不需要引线接合连接，因此没有由接合线引起的寄生电感和电阻，因此提高性能并降低封装成本。 单片式公共漏极JFET器件可以应用于降压转换器，升压转换器，反相转换器，开关和两级DC-DC转换器，以提高其性能和效率。 还提供了用于电流感测或比例电流产生的替代单芯片公共漏极JFET器件。

公开(公告)号：US07746926B2

公开(公告)日：2010-06-29

申请号：US11272699

申请日：2005-11-15

Applicant: Kwan-Jen Chu ,  Chung-Lung Pai ,  Po-Shun Chung ,  Jing-Meng Liu

Inventor： Kwan-Jen Chu ,  Chung-Lung Pai ,  Po-Shun Chung ,  Jing-Meng Liu

IPC: H03K7/08 ,  H03K9/08

CPC classification number: H02M3/156

Abstract: A pulse width modulation (PWM) Regulator System with automatically switching pulse skipping mode (PSM) is disclosed. The PWM regulator system comprises a PWM regulator, a PSM switching module and a pulse generator. The PWM regulator converts the input voltage by PWM. The PSM switching module determines to enter or exit the PSM. The pulse generator adaptively produces pulse signal for the switching regulator to operate in PSM.

公开(公告)号：US07728529B2

公开(公告)日：2010-06-01

申请号：US11149292

申请日：2005-06-10

Applicant: Jing-Meng Liu ,  Chung-Lung Pai ,  Hung-Der Su

Inventor： Jing-Meng Liu ,  Chung-Lung Pai ,  Hung-Der Su

IPC: H05B37/02

CPC classification number: H05B33/0857 ,  H05B33/0818 ,  H05B33/0827 ,  Y02B20/347

Abstract: In a LED driver using a depletion mode transistor to serve as a current source, the depletion mode transistor is self-biased for providing a driving current to drive at least one LED, thereby requesting no additional control circuit to control the depletion mode transistor. The driving current is independent on the supply voltage coupled to the at least one LED, thereby requesting no additional voltage regulator, reducing the circuit size, and lowering the cost.

Abstract translation: 在使用耗尽型晶体管作为电流源的LED驱动器中，耗尽型晶体管是自偏置的，用于提供驱动电流以驱动至少一个LED，从而不需要额外的控制电路来控制耗尽型晶体管。 驱动电流独立于耦合到至少一个LED的电源电压，从而不需要额外的电压调节器，减小电路尺寸并降低成本。

公开(公告)号：US20100026256A1

公开(公告)日：2010-02-04

申请号：US12292185

申请日：2008-11-13

Applicant: Jing-Meng Liu ,  An-Tung Chen ,  Fu-Shiang Lai

Inventor： Jing-Meng Liu ,  An-Tung Chen ,  Fu-Shiang Lai

IPC: G05F1/10

CPC classification number: H02M3/158 ,  H02M3/1588 ,  H02M2001/0032 ,  Y02B70/1466 ,  Y02B70/16

Abstract: A switching regulator may operate in a synchronous mode or an asynchronous mode. When the load current is higher than a threshold, the switching regulator switches a pair of serially connected high side and low side switches with a pulse width modulation signal. When the load current is lower than the threshold, the pulse width modulation signal is blocked not to switch the low side switch, the switching regulator switches only the high side switch with the pulse width modulation signal, the low side switch remains off, and a diode serially connected to the high side switch acts as a rectifier.

Abstract translation: 开关调节器可以以同步模式或异步模式工作。 当负载电流高于阈值时，开关稳压器用脉冲宽度调制信号切换一对串联的高侧和低压开关。 当负载电流低于阈值时，脉冲宽度调制信号被阻止而不切换低压侧开关，开关稳压器仅利用脉宽调制信号切换高侧开关，低侧开关保持关断， 串联连接到高侧开关的二极管充当整流器。

公开(公告)号：US07652536B2

公开(公告)日：2010-01-26

申请号：US12068774

申请日：2008-02-12

Applicant: Hung-Der Su ,  Jing-Meng Liu ,  An-Tung Chen ,  Pao-Chuan Lin

Inventor： Hung-Der Su ,  Jing-Meng Liu ,  An-Tung Chen ,  Pao-Chuan Lin

IPC: H03F3/45 ,  H03F1/14

CPC classification number: H03F1/26 ,  H03F1/083 ,  H03F3/45197 ,  H03F2203/45356

Abstract: An amplifier circuit with internal zeros provides a second pole in addition to a first pole and two zeros such that the second pole can prevent excessive gain at high frequency, so as to have high-frequency noise under control.

Abstract translation: 具有内部零点的放大器电路除了第一极点和第二极点之外还提供第二极点，使得第二极点可以在高频下防止过高的增益，从而具有控制的高频噪声。

公开(公告)号：US20090201079A1

公开(公告)日：2009-08-13

申请号：US12385720

申请日：2009-04-17

Applicant: Liang-Pin Tai ,  Jing-Meng Liu ,  Hung-Der Su

Inventor： Liang-Pin Tai ,  Jing-Meng Liu ,  Hung-Der Su

IPC: G05F3/02

CPC classification number: H01L27/098 ,  H01L27/0744 ,  H01L29/7722 ,  H01L29/8083

Abstract: A single-chip common-drain JFET device comprises a drain, two gates and two source arranged such that two common-drain JFETs are formed therewith. Due to the two JFETs merged within a single chip, no wire bonding connection is needed therebetween, thereby without parasitic inductance and resistance caused by bonding wire, and therefore improving the performance and reducing the package cost. The single-chip common-drain JFET device may be applied in buck converter, boost converter, inverting converter, switch, and two-step DC-to-DC converter to improve their performance and efficiency. Alternative single-chip common-drain JFET devices are also provided for current sense or proportional current generation.

公开(公告)号：US07557553B2

公开(公告)日：2009-07-07

申请号：US11650525

申请日：2007-01-08

Applicant: Hung-Der Su ,  Jing-Meng Liu

Inventor： Hung-Der Su ,  Jing-Meng Liu

IPC: H03K19/0175

CPC classification number: H02M3/156

Abstract: A power supply circuit and a control method are provided, in which the original enable pad and output pad, or the enable pad and feedback pad are used to trim the output voltage of the power supply circuit without extra trim pads.

Abstract translation: 提供了电源电路和控制方法，其中原始使能焊盘和输出焊盘或使能焊盘和反馈焊盘用于修剪电源电路的输出电压而无需额外的修整焊盘。

公开(公告)号：US20080180073A1

公开(公告)日：2008-07-31

申请号：US12008272

申请日：2008-01-10

Applicant: Jing-Meng Liu ,  Chung-Lung Pai ,  Wei-Che Chiu

Inventor： Jing-Meng Liu ,  Chung-Lung Pai ,  Wei-Che Chiu

IPC: G05F1/573 ,  G05F1/00

CPC classification number: G05F1/575

Abstract: The present invention discloses a power supply comprising: a switching regulator circuit converting an input voltage to an intermediate voltage; a low dropout linear regulator circuit converting the intermediate voltage to an output voltage so as to supply a load current to a load; and a feedback control circuit which increases the noise filtering effect of the low dropout linear regulator circuit when the load current increases.

Abstract translation: 本发明公开了一种电源，包括：将输入电压转换为中间电压的开关调节器电路; 将中间电压转换为输出电压以便向负载提供负载电流的低压差线性稳压器电路; 以及反馈控制电路，其在负载电流增加时增加低压降线性调节器电路的噪声滤波效果。