公开(公告)号：US20070280069A1

公开(公告)日：2007-12-06

申请号：US11755186

申请日：2007-05-30

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

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

IPC分类号： G11B20/10

CPC分类号： G11B20/10009 ,  G11B7/0053 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/1217 ,  G11B27/24 ,  G11B2020/1238 ,  G11B2020/1239 ,  G11B2020/1268 ,  G11B2020/1269 ,  G11B2020/1274 ,  G11B2020/1287 ,  G11B2220/2562

摘要： The invention provides an automatic gain controller processing an input signal for wobble detection circuit. An exemplary embodiment of the automatic gain controller comprises an envelope detection module, an analog to digital converter, a digital control module, a digital to analog converter, and a variable gain amplifier. The envelope detection module detects an envelope magnitude of an amplified signal. The analog to digital converter converts the envelope magnitude from analog to digital to obtain a digital envelope signal. The digital control module determines a digital gain signal for amplification of the input signal according to the digital envelope signal. The digital to analog converter converts the digital gain signal to an analog gain signal. The variable gain amplifier then amplifies the input signal according to the analog gain signal to obtain the amplified wobble signal.

摘要翻译： 本发明提供一种自动增益控制器来处理摆动检测电路的输入信号。 自动增益控制器的示例性实施例包括包络检测模块，模数转换器，数字控制模块，数模转换器和可变增益放大器。 包络检测模块检测放大信号的包络幅度。 模数转换器将包络幅度从模拟转换为数字，以获得数字包络信号。 数字控制模块根据数字包络信号确定用于放大输入信号的数字增益信号。 数模转换器将数字增益信号转换为模拟增益信号。 然后，可变增益放大器根据模拟增益信号放大输入信号，以获得放大的摆动信号。

公开(公告)号：US20050041409A1

公开(公告)日：2005-02-24

申请号：US10642696

申请日：2003-08-19

申请人： Chia-Wei Liao

发明人： Chia-Wei Liao

IPC分类号： H05K9/00

CPC分类号： H05K9/0032

摘要： An EMI protective cover is constructed to include a bottom cover shell for covering on the circuit board over electronic components, the bottom cover shell having stub pins around the four sides and an inspection hole in the top wall, and a top cover shell detachably covered on the bottom cover shell, the top cover shell having springy mounting lugs and smoothly arched springy retaining lugs arranged around the four sides and respectively pressed on the peripheral walls of the bottom cover shell, the springy mounting lugs each having a pin hole respectively forced into engagement with the stub pins of the bottom cover shell. The electronic components are accessible through the inspection hole after removal of the top cover shell from the bottom cover shell.

摘要翻译： EMI保护盖被构造成包括用于在电路板上覆盖电子部件的底盖壳体，底盖壳体具有围绕四个侧面的短截线和顶壁中的检查孔，以及顶盖壳体，其可拆卸地覆盖在 底盖壳体，顶盖壳体具有弹性安装凸耳和平滑拱形弹性保持凸耳，其四周布置并分别压在底盖壳体的周壁上，弹性安装凸耳各自具有分别被迫接合的销孔 与底盖外壳的短针。 从顶盖外壳拆下顶盖外壳后，电子部件可通过检查孔进入。

公开(公告)号：US20130221978A1

公开(公告)日：2013-08-29

申请号：US13404928

申请日：2012-02-24

申请人： Chia-Wei Liao ,  Ko-Cheng Wang

发明人： Chia-Wei Liao ,  Ko-Cheng Wang

IPC分类号： G01R31/02 ,  H05B37/02

CPC分类号： H05B33/0827 ,  G01R31/025 ,  H05B33/089

摘要： The present invention discloses a light emitting device control circuit and a short detection circuit. The light emitting device control circuit controls a light emitting array which includes a plurality of light emitting device strings. Each light emitting device string includes a first terminal which is connected to a common node, a second terminal, and a plurality of light emitting devices connected in series. The light emitting device control circuit includes: a short detection circuit, coupled to the second terminals to receive second terminal signals from the second terminals, generating comparison signals according to whether the second terminal signals are higher than a reference signal, and generating a short detection signal according to whether a number of the comparison signals is between a first setting value and a second setting value.

摘要翻译： 本发明公开了一种发光器件控制电路和短路检测电路。 发光器件控制电路控制包括多个发光器件串的发光阵列。 每个发光器件串包括连接到公共节点的第一端子，第二端子和串联连接的多个发光器件。 发光器件控制电路包括：短路检测电路，耦合到第二端子以接收来自第二端子的第二端子信号，根据第二端子信号是否高于参考信号产生比较信号，并产生短路检测 根据多个比较信号是否处于第一设定值和第二设定值之间的信号。

公开(公告)号：US20120234125A1

公开(公告)日：2012-09-20

申请号：US13047940

申请日：2011-03-15

申请人： Chia-Wei Liao

发明人： Chia-Wei Liao

IPC分类号： B62M25/04 ,  B62K23/06

CPC分类号： B62M25/04 ,  B62K23/06

摘要： A speed control device, which is adapted to be used in connection with a derailleur type bicycle or internal gear hub type bicycle, has one operation mode for up-shifting the speed and another operation mode for down-shifting the speed. The two operation modes can be affected by an operation lever, and with the operation lever being pivoted in a second rotation direction for the up-shifting operation and in a first rotation direction for the down-shifting operation.

摘要翻译： 一种适用于与拨链器式自行车或内齿轮式自行车相关联使用的速度控制装置具有一种用于上移速度的操作模式和用于下降速度的另一操作模式。 这两种操作模式可能受到操作杆的影响，并且操作杆在向上移动操作的第二旋转方向上枢转并且在向下移动操作的第一旋转方向上。

公开(公告)号：US08149044B2

公开(公告)日：2012-04-03

申请号：US12222933

申请日：2008-08-20

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.

摘要翻译： 微调电路被配置成使得电子设备将分解以产生高电流以修整保险丝。 电子设备被选择性地配置为具有低于施加电压的击穿电压，以使其击穿的触发是可控的。 在一个实施例中，电子设备分别在具有两个击穿电压的两个状态之间切换，并且所施加的电压高于击穿电压中的一个并且低于另一个击穿电压。

公开(公告)号：US07991030B2

公开(公告)日：2011-08-02

申请号：US12195414

申请日：2008-08-21

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：US07903006B2

公开(公告)日：2011-03-08

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： H03M1/00

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：US07796480B2

公开(公告)日：2010-09-14

申请号：US11757426

申请日：2007-06-04

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

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

IPC分类号： G11B7/00

CPC分类号： G11B7/094 ,  G11B7/0941 ,  G11B7/0956 ,  G11B20/10009 ,  G11B2020/1287

摘要： An apparatus for light spot servo signal detection for reading an optical recording medium having a plurality of non-writable areas between writable data areas containing address information. An optical pickup provides a light spot to the non-writable areas of the optical recording medium with a predetermined state according to a control signal, and detects optical reflecting signals from the optical recording medium to generate a detection signal. A signal adjusting module offsets signal levels of the detection signal to an operating range to generate an offset shifted detection signal. An analog to digital converter digitizes the offset shifted detection signal to generate a digital signal. A detection circuit detects the servo detection signal according to the digital signal.

摘要翻译： 一种光点伺服信号检测装置，用于读取在包含地址信息的可写数据区之间具有多个不可写区域的光记录介质。 光拾取器根据控制信号以预定状态向光记录介质的不可写区域提供光点，并且检测来自光记录介质的光反射信号以产生检测信号。 信号调整模块将检测信号的信号电平偏移到工作范围以产生偏移移位的检测信号。 模数转换器对偏移检测信号进行数字化以产生数字信号。 检测电路根据数字信号检测伺服检测信号。

公开(公告)号：US07706238B2

公开(公告)日：2010-04-27

申请号：US11758018

申请日：2007-06-05

申请人： Ming-Jiou Yu ,  Chun-Yu Lin ,  Kuo-Jung Lan ,  Kuan-Hua Chao ,  Chia-Wei Liao ,  Chih-Ching Chen ,  Shu-Hung Chou ,  Jong-Woei Chen

发明人： Ming-Jiou Yu ,  Chun-Yu Lin ,  Kuo-Jung Lan ,  Kuan-Hua Chao ,  Chia-Wei Liao ,  Chih-Ching Chen ,  Shu-Hung Chou ,  Jong-Woei Chen

IPC分类号： G11B7/00

CPC分类号： G11B7/1263 ,  G11B7/08505 ,  G11B7/0903

摘要： A laser power control system and related method for reducing a settling time in a target laser power transition are disclosed. The laser power control system includes a state decision circuit, for generating a state decision signal according to a selected operational state of a target circuit; a plurality of buffers, for storing a plurality of control data corresponding to a plurality of candidate operational states of the target circuit respectively; and a multiplexer, coupled between the state decision circuit and the buffers, for coupling a selected buffer of the buffers and the target circuit according to the state decision signal for outputting a control datum stored in the selected buffer to the target circuit.

摘要翻译： 公开了一种用于减少目标激光功率转换中的建立时间的激光功率控制系统和相关方法。 激光功率控制系统包括状态判定电路，用于根据所选择的目标电路的操作状态产生状态判定信号; 多个缓冲器，用于分别存储对应于所述目标电路的多个候选操作状态的多个控制数据; 以及耦合在所述状态判定电路和所述缓冲器之间的多路复用器，用于根据用于将所选择的缓冲器中存储的控制数据输出到所述目标电路的所述状态判定信号来耦合所述缓冲器的选定缓冲器和所述目标电路。

公开(公告)号：US20090141759A1

公开(公告)日：2009-06-04

申请号：US12195414

申请日：2008-08-21

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。