公开(公告)号：US20130221875A1

公开(公告)日：2013-08-29

申请号：US13775156

申请日：2013-02-23

申请人： Chia-Wei Liao ,  Jing-Meng Liu

发明人： Chia-Wei Liao ,  Jing-Meng Liu

IPC分类号： H05B33/08

CPC分类号： H05B33/0851 ,  H05B33/0815

摘要： The present invention discloses a light emitting device circuit and a control method thereof. The light emitting device circuit includes: a light emitting device control circuit, for converting an input voltage to an output voltage according to a control signal, wherein the output voltage is supplied to a light emitting device circuit; a voltage supply circuit, which is coupled to the light emitting device circuit, for generating a supply voltage from the output voltage; and a remote control circuit, which is coupled to the voltage supply circuit, for receiving the supply voltage, and generating the control signal according to a remote signal.

摘要翻译： 本发明公开了一种发光器件电路及其控制方法。 发光器件电路包括：发光器件控制电路，用于根据控制信号将输入电压转换为输出电压，其中输出电压被提供给发光器件电路; 耦合到所述发光器件电路的用于从所述输出电压产生电源电压的电压供应电路; 以及遥控电路，其耦合到电压供应电路，用于接收电源电压，并根据远程信号产生控制信号。

公开(公告)号：US20130215651A1

公开(公告)日：2013-08-22

申请号：US13765609

申请日：2013-02-12

申请人： Chia-Wei Liao ,  Jing-Meng Liu

发明人： Chia-Wei Liao ,  Jing-Meng Liu

IPC分类号： H02M5/40

CPC分类号： H02M5/40 ,  H02M3/33523 ,  H02M2001/0032 ,  Y02B70/16

摘要： The present invention discloses an isolated power converter circuit and a control method thereof. The isolated power converter circuit includes: a transformer circuit, a power switch circuit, an opto-coupler circuit, and a control circuit. The transformer circuit includes a first winding and a second winding. The power switch circuit is coupled to the transformer circuit to control it according to a driving signal. The opto-coupler circuit generates a feedback signal. The control circuit is coupled to the power switch circuit and the opto-coupler circuit, for generating the driving signal according to the feedback signal. The control circuit includes a distinguishing circuit for distinguishing a status of the feedback signal.

摘要翻译： 本发明公开了一种隔离电力转换电路及其控制方法。 隔离电力转换器电路包括：变压器电路，电源开关电路，光耦合器电路和控制电路。 变压器电路包括第一绕组和第二绕组。 功率开关电路耦合到变压器电路，以根据驱动信号进行控制。 光耦合器电路产生反馈信号。 控制电路耦合到功率开关电路和光耦合器电路，用于根据反馈信号产生驱动信号。 控制电路包括用于区分反馈信号的状态的区别电路。

公开(公告)号：US08300670B2

公开(公告)日：2012-10-30

申请号：US13166817

申请日：2011-06-23

申请人： Hsiao-Yuan Chi ,  Chih-Ching Chen ,  Chia-Wei Liao

发明人： Hsiao-Yuan Chi ,  Chih-Ching Chen ,  Chia-Wei Liao

IPC分类号： H01S3/00

CPC分类号： G11B7/126

摘要： A method for deriving precise control over laser power of an optical pickup unit (OPU) includes: providing an analog-to-digital converter (ADC) within an automatic power calibration (APC) circuit to derive a path gain and/or a path offset from the APC circuit; and selectively performing compensation according to the gain and/or the path offset, in order to maintain precision of a relationship between the laser power and a target command utilized for controlling the laser power. An associated APC circuit comprising an ADC and at least one compensation module is further provided. The ADC is utilized for deriving a path gain and/or a path offset from the APC circuit. The compensation module is utilized for selectively performing compensation according to the path gain and/or the path offset, in order to control the laser power by a target command.

摘要翻译： 用于导出对光学拾取单元（OPU）的激光功率的精确控制的方法包括：在自动功率校准（APC）电路内提供模数转换器（ADC）以导出路径增益和/或路径偏移 从APC电路; 并且根据增益和/或路径偏移选择性地执行补偿，以便保持激光功率与用于控制激光功率的目标指令之间的关系的精度。 还提供了包括ADC和至少一个补偿模块的相关APC电路。 ADC用于从APC电路导出路径增益和/或路径偏移。 补偿模块用于根据路径增益和/或路径偏移选择性地执行补偿，以便通过目标命令控制激光功率。

公开(公告)号：US20120242238A1

公开(公告)日：2012-09-27

申请号：US13421733

申请日：2012-03-15

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

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

IPC分类号： H05B37/02

CPC分类号： H05B33/0815

摘要： The present invention discloses a light emitting device power supply circuit, a light emitting device driver circuit and a control method thereof. The light emitting device driver circuit is coupled to a tri-electrode AC switch (TRIAC) dimmer circuit, and it controls the brightness of a light emitting device circuit according a rectified dimming signal. The light emitting device driver circuit includes a power stage circuit and a light emitting device control circuit. The light emitting device control circuit generates a switch control signal. The power stage circuit operates at least one power switch thereof according to the switch control signal to generate a latching current for firing the TRIAC dimmer circuit, and the latching current is inputted to the light emitting device circuit.

摘要翻译： 本发明公开了一种发光装置电源电路，发光装置驱动电路及其控制方法。 发光器件驱动电路耦合到三极交流开关（TRIAC）调光电路，并根据整流调光信号控制发光器件电路的亮度。 发光器件驱动电路包括功率级电路和发光器件控制电路。 发光装置控制电路产生开关控制信号。 功率级电路根据开关控制信号操作其至少一个电源开关，以产生用于触发TRIAC调光电路的锁存电流，并且将锁存电流输入到发光器件电路。

公开(公告)号：US08253476B2

公开(公告)日：2012-08-28

申请号：US13247027

申请日：2011-09-28

申请人： Chia-Wei Liao

发明人： Chia-Wei Liao

IPC分类号： H01H85/00

CPC分类号： H01H85/0241

摘要： A trimmer circuit is so configured that an electronic device will break down to produce a high current to trim a fuse. The electronic device is selectively configured to have a breakdown voltage lower than an applied voltage, for the trigger of its breakdown to be controllable. In an embodiment, the electronic device is switched between two states having two breakdown voltages respectively, and the applied voltage is higher than one of the breakdown voltages and lower than the other one.

公开(公告)号：US08217632B2

公开(公告)日：2012-07-10

申请号：US12658560

申请日：2010-02-05

申请人： Jing-Meng Liu ,  Chia-Wei Liao ,  Heng Yun

发明人： Jing-Meng Liu ,  Chia-Wei Liao ,  Heng Yun

IPC分类号： G05F1/613 ,  G05F1/44

CPC分类号： H05B33/0818 ,  H02M3/1582

摘要： The present invention discloses a synchronous driver circuit, comprising: an inductor having one end coupled to an input voltage; a first power transistor having one end coupled to the other end of the inductor and another end supplying an output voltage; a second power transistor having one end coupled to the other end of the inductor and another end coupled to ground; a control circuit for controlling the operation of the first and second power transistors; a gate driver coupled to the control circuit and having an output controlling the gate of the first power transistor; and a bootstrap capacitor having one end coupled to a voltage node and the other end coupled to the other end of the inductor, the voltage across the bootstrap capacitor being provided as the operational voltage of the gate driver.

摘要翻译： 本发明公开了一种同步驱动器电路，包括：电感器，其一端耦合到输入电压; 第一功率晶体管，其一端耦合到电感器的另一端，另一端提供输出电压; 第二功率晶体管，其一端耦合到电感器的另一端，另一端耦合到地; 用于控制第一和第二功率晶体管的操作的控制电路; 耦合到控制电路并具有控制第一功率晶体管的栅极的输出的栅极驱动器; 以及自耦电容器，其一端耦合到电压节点，另一端耦合到电感器的另一端，所述自举电容器两端的电压被提供为栅极驱动器的工作电压。

公开(公告)号：US07911891B2

公开(公告)日：2011-03-22

申请号：US11758082

申请日：2007-06-05

申请人： Chia-Wei Liao ,  Chih-Ching Chen ,  Yuh Cheng ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Chun-Yu Lin ,  Shu-Hung Chou

发明人： Chia-Wei Liao ,  Chih-Ching Chen ,  Yuh Cheng ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Chun-Yu Lin ,  Shu-Hung Chou

IPC分类号： G11B7/00

CPC分类号： G11B7/0941 ,  G11B7/0903

摘要： The invention provides an apparatus for controlling servo signal gains of an optical disc drive. The apparatus adjusts the gains of a plurality of servo signals controlling a servo system of the optical disc drive according to a closed-loop mode or a state-reloading mode whenever the optical disk drive encounters an operating state transition. In closed-loop mode, at least one AGC loop of the apparatus compensates the gains of the servo signals with a selectable bandwidth during a specific period after the operating state transition to accelerate the convergence of the servo signals. In state-reloading mode, at least one AGC loop of the apparatus reloads the previously saved convergence values or pre-determined values as the initial values according to the current operating state immediately after the operating state transition to accelerate the convergence of the servo signals.

摘要翻译： 本发明提供一种用于控制光盘驱动器的伺服信号增益的装置。 只要光盘驱动器遇到操作状态转换，该装置根据闭环模式或状态重新加载模式来调整控制光盘驱动器的伺服系统的多个伺服信号的增益。 在闭环模式中，该装置的至少一个AGC环路在操作状态转换之后的特定周期期间以可选择的带宽补偿伺服信号的增益，以加速伺服信号的收敛。 在状态重新加载模式中，装置的至少一个AGC回路根据当前运行状态在运行状态转换之后重新加载先前存储的收敛值或预定值作为初始值，以加速伺服信号的收敛。

公开(公告)号：US20100219908A1

公开(公告)日：2010-09-02

申请号：US12394068

申请日：2009-02-27

申请人： Li-Chun Tu ,  Chia-Wei Liao ,  Tysh-Bin Liu

发明人： Li-Chun Tu ,  Chia-Wei Liao ,  Tysh-Bin Liu

IPC分类号： H03H7/00

CPC分类号： H03M3/396 ,  H03M3/502

摘要： A digital to analog converter for converting a digital input signal provided by a host to an analog output signal includes a modulator receiving the digital input signal, modulating the digital input signal, and outputting a modulated signal, and a filtering circuit receiving the modulated signal, low pass filtering the modulated signal, and outputting the analog output signal to an output node. The filtering circuit includes a first switching circuit for adjusting the bandwidth of the filtering circuit according to a bandwidth switching signal.

摘要翻译： 用于将由主机提供的数字输入信号转换为模拟输出信号的数模转换器包括调制器，接收数字输入信号，调制数字输入信号并输出​​调制信号，以及滤波电路接收调制信号， 低通滤波调制信号，并将模拟输出信号输出到输出节点。 滤波电路包括：第一切换电路，用于根据带宽切换信号调整滤波电路的带宽。

公开(公告)号：US20090073827A1

公开(公告)日：2009-03-19

申请号：US12273601

申请日：2008-11-19

申请人： Bing-Yu Hsieh ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Shu-Hung Chou ,  Chih-Ching Chen ,  Chia-Wei Liao

发明人： Bing-Yu Hsieh ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Shu-Hung Chou ,  Chih-Ching Chen ,  Chia-Wei Liao

IPC分类号： G11B7/125

CPC分类号： H03M1/1225 ,  G11B7/0903 ,  G11B7/0912 ,  G11B7/0941 ,  G11B7/1263 ,  H03M1/129

摘要： An automatic power control system, a down sampling circuit and a down sampling method. The automatic power control system is incorporated in an optical disc drive comprising a laser diode for receiving a control signal to generate a laser beam; and a photodetector for detecting the laser beam to generate an analog input signal. The automatic power control system comprises an analog-to-digital converter, a down sampling circuit, a comparator, and a digital-to-analog converter. The analog-to-digital converter converts the analog input signal to digital data. The down sampling circuit, coupled to the analog-to-digital converter, comprises a down sampler, a counter, and a controller. The down sampler receives a predetermined amount of digital data to generate representation data. The counter, coupled to the down sampler, calculates the amount of digital data, and resets the down sampler when the amount equals or exceeds the predetermined count. The controller, coupled to the counter, disables the counter when the digital data is invalid. The comparator, coupled to the down sampling circuit, compares the representation data with predetermined target data to generate error data. The digital-to-analog converter, coupled to the comparator, converts the error data to analog to generate the control signal.

摘要翻译： 自动功率控制系统，下采样电路和下采样方法。 自动功率控制系统结合在包括用于接收控制信号以产生激光束的激光二极管的光盘驱动器中; 以及用于检测激光束以产生模拟输入信号的光电检测器。 自动功率控制系统包括模数转换器，下采样电路，比较器和数 - 模转换器。 模数转换器将模拟输入信号转换为数字数据。 耦合到模数转换器的下采样电路包括下采样器，计数器和控制器。 下采样器接收预定量的数字数据以产生表示数据。 耦合到下采样器的计数器计算数字数据量，并且当量等于或超过预定计数时重置下采样器。 耦合到计数器的控制器在数字数据无效时禁用计数器。 耦合到下采样电路的比较器将表示数据与预定目标数据进行比较以产生误差数据。 耦合到比较器的数模转换器将误差数据转换成模拟以产生控制信号。

公开(公告)号：US20070291622A1

公开(公告)日：2007-12-20

申请号：US11758094

申请日：2007-06-05

申请人： Kuo-Jung Lan ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Yuh Cheng ,  Ming-Jiou Yu ,  Yu-Hsuan Lin ,  Shu-Hung Chou

发明人： Kuo-Jung Lan ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Yuh Cheng ,  Ming-Jiou Yu ,  Yu-Hsuan Lin ,  Shu-Hung Chou

IPC分类号： G11B7/00

CPC分类号： G11B7/0943 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/1263

摘要： A high pass filtering device for an optical disc drive comprises a first low pass filter (LPF) of a first sampling rate, filtering a digital input signal; a down-sampler receiving a first filtered signal form the first LPF to down-sample the first filtered signal by an integer factor N; a second LPF of a second sampling rate, filtering a first down-sampled signal from the down-sampler, wherein the second LPF has a corner frequency corresponding to a desired frequency of the high pass filtering device, and the second sampling rate is equal to 1/N times the first sampling rate; an up-sampler receiving a second filtered signal from the second LPF to up-sample the second filtered signal by the factor N; and a subtractor subtracting an up-sampled signal output by the up-sampler from the digital input signal when the filter frequency is below a threshold frequency.

摘要翻译： 用于光盘驱动器的高通滤波装置包括第一采样率的第一低通滤波器（LPF），对数字输入信号进行滤波; 下采样器从第一LPF接收第一滤波信号，以对第一滤波信号进行下采样整数因子N; 第二采样率的第二LPF，滤波来自下采样器的第一下采样信号，其中第二LPF具有对应于高通滤波器件的期望频率的转角频率，第二采样率等于 1 / N次第一次采样率; 上采样器接收来自第二LPF的第二滤波信号，以将第二滤波信号向上采样因子N; 以及当滤波器频率低于阈值频率时，减法器从数字输入信号中减去上采样器输出的上采样信号。