公开(公告)号：US08300508B2

公开(公告)日：2012-10-30

申请号：US12890809

申请日：2010-09-27

申请人： Wen-Chun Feng ,  Yen-Chien Cheng ,  Shao-Lun Hung

发明人： Wen-Chun Feng ,  Yen-Chien Cheng ,  Shao-Lun Hung

IPC分类号： G11B20/18

CPC分类号： G11B7/0945

摘要： An apparatus for judging an optical disc includes a gain controller, an amplitude detecting unit and an amplitude comparing unit. The gain controller is used for receiving a radio frequency signal from an optical pickup head; and processing the radio frequency signal into an amplified radio frequency signal with a target amplitude according to an amplitude feedback signal. The amplitude detecting unit is used for receiving the amplified radio frequency signal, generating the amplitude feedback signal to the gain controller, and outputting a top envelope amplitude according to an top envelope signal of the amplified radio frequency signal. The amplitude comparing unit is used for comparing the top envelope amplitude with a threshold value to generate a resulting signal, and judging whether the laser beams emitted from the optical pickup head are irradiated on a blank area or a data-recorded area according to the resulting signal.

摘要翻译： 用于判断光盘的装置包括增益控制器，振幅检测单元和振幅比较单元。 增益控制器用于从光学拾取头接收射频信号; 并根据幅度反馈信号将射频信号处理成具有目标幅度的放大射频信号。 幅度检测单元用于接收放大的射频信号，向增益控制器产生幅度反馈信号，并根据放大射频信号的顶包络信号输出顶包络幅度。 振幅比较单元用于将顶包络幅度与阈值进行比较以产生结果信号，并且根据所得到的信号判断从光学拾取头发射的激光束是否照射在空白区域或数据记录区域 信号。

公开(公告)号：US08130616B2

公开(公告)日：2012-03-06

申请号：US12244288

申请日：2008-10-02

申请人： Chia-Ming Chang ,  Shao-Lun Hung

发明人： Chia-Ming Chang ,  Shao-Lun Hung

IPC分类号： G11B27/36

CPC分类号： G11B27/22 ,  G11B2220/2562

摘要： A method and a device of distinguishing blank area from non-blank area in an optical disc are provided. An input signal such as a DPD TE signal or RF ripple signal is first filtered to obtain a filtered signal. A subtracting operation of the input signal and the filtered signal is then performed to obtain a first signal. According to a peak value and a bottom value of the first signal, the first signal is processed into a second signal. By comparing the second signal with a reference signal, whether the currently read area is blank area or non-blank area can be discriminated. An indicating signal is outputted at a first value to indicate the blank area while the indicating signal is outputted at a second value to indicate the non-blank area.

摘要翻译： 提供了一种在光盘中区分空白区域与非空白区域的方法和装置。 首先对诸如DPD TE信号或RF纹波信号的输入信号进行滤波以获得滤波信号。 然后执行输入信号和滤波信号的减法运算以获得第一信号。 根据第一信号的峰值和底值，第一信号被处理成第二信号。 通过将第二信号与参考信号进行比较，可以区分当前读取区域是空白区域还是非空白区域。 以第一值输出指示信号以指示空白区域，同时以第二值输出指示信号以指示非空白区域。

公开(公告)号：US20110310718A1

公开(公告)日：2011-12-22

申请号：US12890809

申请日：2010-09-27

申请人： Wen-Chun FENG ,  Yen-Chien Cheng ,  Shao-Lun Hung

发明人： Wen-Chun FENG ,  Yen-Chien Cheng ,  Shao-Lun Hung

IPC分类号： G11B27/36

CPC分类号： G11B7/0945

摘要： An apparatus for judging an optical disc includes a gain controller, an amplitude detecting unit and an amplitude comparing unit. The gain controller is used for receiving a radio frequency signal from an optical pickup head; and processing the radio frequency signal into an amplified radio frequency signal with a target amplitude according to an amplitude feedback signal. The amplitude detecting unit is used for receiving the amplified radio frequency signal, generating the amplitude feedback signal to the gain controller, and outputting a top envelope amplitude according to an top envelope signal of the amplified radio frequency signal. The amplitude comparing unit is used for comparing the top envelope amplitude with a threshold value to generate a resulting signal, and judging whether the laser beams emitted from the optical pickup head are irradiated on a blank area or a data-recorded area according to the resulting signal.

摘要翻译： 用于判断光盘的装置包括增益控制器，振幅检测单元和振幅比较单元。 增益控制器用于从光学拾取头接收射频信号; 并根据幅度反馈信号将射频信号处理成具有目标幅度的放大射频信号。 幅度检测单元用于接收放大的射频信号，向增益控制器产生幅度反馈信号，并根据放大射频信号的顶包络信号输出顶包络幅度。 振幅比较单元用于将顶包络幅度与阈值进行比较以产生结果信号，并且根据所得到的信号判断从光学拾取头发射的激光束是否照射在空白区域或数据记录区域 信号。

公开(公告)号：US20110158614A1

公开(公告)日：2011-06-30

申请号：US12773846

申请日：2010-05-05

申请人： Yen-Chien Cheng ,  Chien-Liang Yeh ,  Shao-Lun Hung

发明人： Yen-Chien Cheng ,  Chien-Liang Yeh ,  Shao-Lun Hung

IPC分类号： H02P3/04

CPC分类号： H02P3/04 ,  G11B19/2063 ,  G11B19/26 ,  G11B19/28 ,  H02P3/08 ,  H02P2203/09

摘要： A motor rotational speed control device for controlling a direct current (DC) brush motor is provided, which includes a motor driver, a detection unit and a central processing unit (CPU). The motor driver is coupled to a first control terminal and a second control terminal of the DC brush motor. The detection unit detects a back electromotive force (EMF) of the DC brush motor through the first control terminal and the second control terminal when the motor driver is set to a disable state, and accordingly generates back EMF information. The CPU determines whether the direct current brush motor has stopped rotating according to the back EMF information, and determines whether to generate a brake control signal according to a determination result. The motor driver reduces a rotation speed of the DC brush motor according to the brake control signal when the motor driver is set to an enable state.

摘要翻译： 提供一种用于控制直流（DC）电刷电动机的电动机转速控制装置，其包括电动机驱动器，检测单元和中央处理单元（CPU）。 马达驱动器耦合到DC刷马达的第一控制端子和第二控制端子。 当马达驱动器被设置为禁用状态时，检测单元通过第一控制端子和第二控制端子检测直流电刷电动机的反电动势（EMF），从而产生反电动势信息。 CPU根据反电动势信息确定直流电刷电动机是否停止转动，并根据确定结果确定是否产生制动控制信号。 当电动机驱动器设定为使能状态时，电动机驱动器根据制动控制信号降低直流电刷电动机的转速。

公开(公告)号：US20090092021A1

公开(公告)日：2009-04-09

申请号：US12244288

申请日：2008-10-02

申请人： Chia-Ming Chang ,  Shao-Lun Hung

发明人： Chia-Ming Chang ,  Shao-Lun Hung

IPC分类号： G11B5/58

CPC分类号： G11B27/22 ,  G11B2220/2562

摘要： A method and a device of distinguishing blank area from non-blank area in an optical disc are provided. An input signal such as a DPD TE signal or RF ripple signal is first filtered to obtain a filtered signal. A subtracting operation of the input signal and the filtered signal is then performed to obtain a first signal. According to a peak value and a bottom value of the first signal, the first signal is processed into a second signal. By comparing the second signal with a reference signal, whether the currently read area is blank area or non-blank area can be discriminated. An indicating signal is outputted at a first value to indicate the blank area while the indicating signal is outputted at a second value to indicate the non-blank area.

摘要翻译： 提供了一种在光盘中区分空白区域与非空白区域的方法和装置。 首先对诸如DPD TE信号或RF纹波信号的输入信号进行滤波以获得滤波信号。 然后执行输入信号和滤波信号的减法运算以获得第一信号。 根据第一信号的峰值和底值，第一信号被处理成第二信号。 通过将第二信号与参考信号进行比较，可以区分当前读取区域是空白区域还是非空白区域。 以第一值输出指示信号以指示空白区域，同时以第二值输出指示信号以指示非空白区域。