公开(公告)号：US08508464B2

公开(公告)日：2013-08-13

申请号：US12008797

申请日：2008-01-14

Applicant: Chiawei Liao ,  Xiaoyong Zhang ,  Jing-Meng Liu

Inventor： Chiawei Liao ,  Xiaoyong Zhang ,  Jing-Meng Liu

IPC: G09G3/36 ,  G09G5/00 ,  H05B37/02 ,  H05B37/00

CPC classification number: G09G3/3426

Abstract: The present invention discloses a backlight control circuit capable of distinguishing an under current condition, comprising: at least one light emission device path having a voltage node; at least one current source for controlling the current amount on the light emission device path; and at least one under current detection circuit for generating a first control signal according to the voltage at the voltage node, wherein when the first control signal changes its state, the under current detection circuit generates a second control signal to change the voltage on the voltage node if the light emission device path is normally connected.

Abstract translation: 本发明公开了一种能够区分欠电流状态的背光控制电路，包括：具有电压节点的至少一个发光器件路径; 至少一个用于控制发光装置路径上的电流量的电流源; 以及至少一个欠电流检测电路，用于根据电压节点处的电压产生第一控制信号，其中当第一控制信号改变其状态时，欠电流检测电路产生第二控制信号以改变电压上的电压 节点，如果发光设备路径正常连接。

公开(公告)号：US20130114308A1

公开(公告)日：2013-05-09

申请号：US13674824

申请日：2012-11-12

Applicant: Chia-Wei Liao ,  Jing-Meng Liu ,  Leng-Nien Hsiu ,  Pei-Yuan Chen

Inventor： Chia-Wei Liao ,  Jing-Meng Liu ,  Leng-Nien Hsiu ,  Pei-Yuan Chen

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M1/4258 ,  Y02B70/126

Abstract: The present invention discloses a switching regulator and a control circuit and a control method thereof. The control circuit of the switching regulator, which controls rectified power within a predetermined range, detects an input voltage and an input current to generate a voltage detection signal and a current detection signal respectively, and the voltage detection signal and the current detection signal are multiplied by one the other to generate a power index. The control circuit generates an error signal according to the power index and a reference signal. A low-pass-filter filters a high frequency band in the process. A control signal generation circuit of the control circuit generates a control signal according to the error signal. And a driver circuit of the control circuit generates an operation signal according to the control signal, for switching a power switch to convert the rectified power to an output voltage.

Abstract translation: 本发明公开了一种开关调节器及其控制电路及其控制方法。 开关调节器的控制电路，其控制在预定范围内的整流功率，检测输入电压和输入电流，分别产生电压检测信号和电流检测信号，并将电压检测信号和电流检测信号相乘 通过另一个来产生权力指数。 控制电路根据功率指标和参考信号产生误差信号。 低通滤波器过滤高频带。 控制电路的控制信号生成电路根据误差信号生成控制信号。 并且控制电路的驱动电路根据控制信号生成操作信号，用于切换电源开关以将整流功率转换为输出电压。

公开(公告)号：US08319444B2

公开(公告)日：2012-11-27

申请号：US12787599

申请日：2010-05-26

Applicant: Chiawei Liao ,  Jing-Meng Liu ,  Leng-Nien Hsiu

Inventor： Chiawei Liao ,  Jing-Meng Liu ,  Leng-Nien Hsiu

IPC: H05B37/00

CPC classification number: H05B33/0818 ,  Y02B20/346

Abstract: The present invention discloses a tail-less LED control circuit, which includes: a power supply stage having an output terminal which provides electrical power to an LED circuit; an output capacitor coupled to the output terminal; an LED driver circuit coupled to the power supply stage for controlling the power supply stage to provide the electrical power to the LED circuit, the LED driver circuit receiving a PWM dimming signal for adjusting brightness of the LED circuit; and a MOSFET switch coupled to the output capacitor in series, the MOSFET switch switching synchronously with the PWM dimming signal to alleviate LED afterglow, wherein the MOSFET switch includes a body diode having an anode-cathode direction against the discharge direction of the output capacitor.

Abstract translation: 本发明公开了一种无尾LED控制电路，其包括：具有向LED电路提供电力的输出端子的电源级; 耦合到所述输出端子的输出电容器; LED驱动器电路，其耦合到所述电源级，用于控制所述电源级以向所述LED电路提供电力，所述LED驱动器电路接收用于调节所述LED电路的亮度的PWM调光信号; 以及耦合到串联的输出电容器的MOSFET开关，MOSFET开关与PWM调光信号同步地切换以减轻LED余辉，其中MOSFET开关包括具有抵抗输出电容器的放电方向的阳极 - 阴极方向的体二极管。

公开(公告)号：US08093822B2

公开(公告)日：2012-01-10

申请号：US12216837

申请日：2008-07-11

Applicant: Jing-Meng Liu

Inventor： Jing-Meng Liu

IPC: H05B37/02

CPC classification number: H05B33/0818 ,  H05B33/0815 ,  H05B33/0866 ,  Y02B20/347

Abstract: An LED driver providing an LED lighting current to an LED path, extracts the LED lighting current information from the LED path to produce a first signal including an AC component and a DC component, and extracts the DC component information of the first signal to produce a second signal to regulate an average of the LED lighting current. This LED driver implements real constant average current regulation for an LED lighting apparatus, eliminates the need of output capacitor as well as rectifier diode in most applications to simplify the circuit of the power stage, and is applicable to power stages of various modes.

Abstract translation: 向LED路径提供LED点亮电流的LED驱动器，从LED路径提取LED点亮电流信息，以产生包括AC分量和DC分量的第一信号，并提取第一信号的DC分量信息以产生 第二个信号来调节LED照明电流的平均值。 该LED驱动器为LED照明装置实现了实际的恒定平均电流调节，在大多数应用中不需要输出电容器以及整流二极管来简化功率级的电路，并且适用于各种模式的功率级。

公开(公告)号：US08049462B2

公开(公告)日：2011-11-01

申请号：US12284235

申请日：2008-09-18

Applicant: Nien-Hui Kung ,  Kwan-Jen Chu ,  Jing-Meng Liu

Inventor： Nien-Hui Kung ,  Kwan-Jen Chu ,  Jing-Meng Liu

IPC: H02J7/02

CPC classification number: H02J7/0031 ,  H02J2007/0039 ,  H02J2007/0062

Abstract: The present invention discloses a universal serial bus (USB) charging circuit, comprising: a charging path for charging a battery from a USB host; a charging switch located on the charging path; a current sensing circuit for sensing current information on the charging path; a maximum available current detection circuit for detecting the maximum available current from the USB host; and a loop controller circuit for controlling the charging switch so that the charging current on the charging path is substantially equal to the maximum available current detected by the maximum available current detection circuit, wherein the maximum available current detection circuit detects the maximum available current during circuit initialization and stores it.

Abstract translation: 本发明公开了一种通用串行总线（USB）充电电路，包括：用于从USB主机对电池充电的充电路径; 位于充电路径上的充电开关; 用于感测充电路径上的当前信息的电流感测电路; 用于检测来自USB主机的最大可用电流的最大可用电流检测电路; 以及环路控制器电路，用于控制充电开关，使得充电路径上的充电电流基本上等于由最大可用电流检测电路检测的最大可用电流，其中最大可用电流检测电路检测电路中的最大可用电流 初始化并存储它。

公开(公告)号：US08044920B2

公开(公告)日：2011-10-25

申请号：US11906511

申请日：2007-10-02

Applicant: Chiawei Liao ,  Jing-Meng Liu

Inventor： Chiawei Liao ,  Jing-Meng Liu

IPC: G09G3/36

CPC classification number: H05B33/0827 ,  H05B33/0815

Abstract: The present invention discloses a backlight control circuit, and a method for controlling light emission devices. The method comprises: providing a plurality of light emission device paths connected in parallel; and setting a total current of the paths connected in parallel to a constant.

Abstract translation: 本发明公开了一种背光控制电路和控制发光装置的方法。 该方法包括：提供并联连接的多个发光装置路径; 并且将并联连接的路径的总电流设定为常数。

公开(公告)号：US20100301764A1

公开(公告)日：2010-12-02

申请号：US12768046

申请日：2010-04-27

Applicant: Jing-Meng Liu

Inventor： Jing-Meng Liu

IPC: H05B37/02

CPC classification number: H05B33/0827 ,  H05B33/0818 ,  Y02B20/346

Abstract: The present invention discloses an LED controller with phase-shift dimming function and an LED Phase-Shift dimming circuit and method thereof. The LED controller includes: a power circuit for supplying DC power to multiple LED channels; and an LED phase-shift dimming circuit for receiving a pulse width modulation (PWM) input signal and generating multiple phase-shifted PWM signals with a shifted phase between one another, wherein a turn-ON timing of each of the multiple phase-shifted PWM signals follows a turn-OFF timing of a previous PWM signal which is the input PWM signal or a previous one of the multiple phase-shifted PWM signals.

Abstract translation: 本发明公开了一种具有相移调光功能的LED控制器和一个LED相移调光电路及其方法。 LED控制器包括：用于向多个LED通道提供直流电力的电源电路; 以及LED相移调光电路，用于接收脉冲宽度调制（PWM）输入信号并产生具有相互偏移的相位的多个相移PWM信号，其中多个相移PWM中的每一个的导通定时 信号遵循作为输入PWM信号或多个相移PWM信号中的先前PWM信号的先前PWM信号的关断定时。

公开(公告)号：US20100207451A1

公开(公告)日：2010-08-19

申请号：US12770094

申请日：2010-04-29

Applicant: Jing-Meng Liu

Inventor： Jing-Meng Liu

IPC: G05F3/04

CPC classification number: G05F1/67 ,  H02J7/35 ,  Y02E10/566 ,  Y02E10/58 ,  Y10T307/50

Abstract: The present invention discloses an analog photovoltaic power circuit, comprising: a photovoltaic device group for receiving photo energy to generate an input voltage; a power stage circuit for converting the input voltage to an output voltage; an optimum voltage estimation circuit for receiving a predetermined voltage and estimating an optimum voltage according to a direction of variation of the input voltage and a direction of variation of the power generated by the photovoltaic device group; and an analog comparison and control circuit for comparing the optimum voltage with the input voltage, to thereby control the operation of the power stage circuit.

公开(公告)号：US20090236997A1

公开(公告)日：2009-09-24

申请号：US12382588

申请日：2009-03-19

Applicant: Jing-Meng Liu

Inventor： Jing-Meng Liu

IPC: H05B41/34 ,  H05B39/04 ,  H05B41/36

CPC classification number: A01M29/10

Abstract: A LED control circuit and method generate a high frequency clock signal with a fixed duty for a LED driver, to supply a switching current to drive a LED to emit light flashing at a modulated high frequency and with a fixed duty. By controlling the flashing LED light within certain flashing frequency range, the circuit and method allow a LED light source for expelling, confusing or trapping insects but serving only an illuminative or decorative purpose to human eyes, due to the difference between human beings and insects in visual perception of flashing frequencies.

Abstract translation: LED控制电路和方法产生用于LED驱动器的固定占空比的高频时钟信号，以提供开关电流来驱动LED以以调制的高频率和固定占空比发光闪烁。 通过在一定的闪烁频率范围内控制闪烁的LED灯，电路和方法允许LED光源驱散，混淆或捕获昆虫，但仅为人眼照亮或装饰目的，由于人与昆虫之间的差异 闪烁频率的视觉感知。

公开(公告)号：US20090206663A1

公开(公告)日：2009-08-20

申请号：US12379256

申请日：2009-02-18

Applicant: Jing-Meng Liu

Inventor： Jing-Meng Liu

IPC: H02J1/00

CPC classification number: H02M3/1588 ,  H02M2001/0022 ,  H02M2001/007 ,  Y02B70/1466 ,  Y10T307/406

Abstract: A power converter includes a first conversion stage for converting an input voltage to a first output voltage and a second conversion stage for converting the first output voltage to a second output voltage. An error signal is generated according to a reference voltage and a feedback signal extracted from the second conversion stage, and a feed forward signal is generated from the error signal and injected into the first conversion stage to stabilize the first output voltage. The feedback signal is a function of the second output voltage and thus, the error signal varies with the second output voltage. As a result, the first output voltage will be stabilized when the second output voltage varies, due to the varied feed forward signal.

Abstract translation: 功率转换器包括用于将输入电压转换为第一输出电压的第一转换级和用于将第一输出电压转换为第二输出电压的第二转换级。 根据从第二转换级提取的参考电压和反馈信号产生误差信号，并且从误差信号产生前馈信号并将其注入到第一转换级中以稳定第一输出电压。 反馈信号是第二输出电压的函数，因此误差信号随着第二输出电压而变化。 结果，由于前馈信号的变化，当第二输出电压变化时，第一输出电压将被稳定。