Methods and devices for controlling access to an optical disc
    11.
    发明授权
    Methods and devices for controlling access to an optical disc 有权
    用于控制对光盘的访问的方法和装置

    公开(公告)号:US08077569B2

    公开(公告)日:2011-12-13

    申请号:US12364496

    申请日:2009-02-02

    CPC classification number: G11B7/08505

    Abstract: A device for controlling access to an optical disc includes a control word calculator and a numerically controlled oscillator (NCO). The control word calculator is arranged to calculate a control word corresponding to a radius where the optical disc is accessed. In addition, the NCO is arranged to generate an output frequency according to the control word, wherein the output frequency is utilized for accessing the optical disc. An associated method for controlling access to an optical disc includes: calculating a control word corresponding to a radius where the optical disc is accessed; and generating an output frequency according to the control word, wherein the output frequency is utilized for accessing the optical disc.

    Abstract translation: 用于控制对光盘的访问的装置包括控制字计算器和数控振荡器(NCO)。 控制字计算器被配置为计算对应于光盘被访问的半径的控制字。 此外,NCO被配置为根据控制字产生输出频率,其中输出频率用于访问光盘。 用于控制对光盘的访问的相关方法包括:计算对应于访问光盘的半径的控制字; 以及根据所述控制字产生输出频率,其中所述输出频率用于访问所述光盘。

    Apparatus and methods for light spot servo signal detection
    12.
    发明授权
    Apparatus and methods for light spot servo signal detection 有权
    光点伺服信号检测装置及方法

    公开(公告)号:US07796480B2

    公开(公告)日:2010-09-14

    申请号:US11757426

    申请日:2007-06-04

    Abstract: 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.

    Abstract translation: 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。

    Control circuit and method of controlling rotation frequency of spindle in optical disc drive for reducing frequency difference of output signals respectively corresponding to different disc rotation modes
    13.
    发明授权
    Control circuit and method of controlling rotation frequency of spindle in optical disc drive for reducing frequency difference of output signals respectively corresponding to different disc rotation modes 失效
    控制电路和控制光盘驱动器中主轴旋转频率的方法,以减少分别对应不同光盘旋转模式的输出信号的频差

    公开(公告)号:US07567054B2

    公开(公告)日:2009-07-28

    申请号:US11307962

    申请日:2006-03-01

    CPC classification number: G11B19/24 H02P6/08

    Abstract: A control circuit and a control method of controlling a rotation frequency of a spindle in an optical disc drive, the control circuit comprising: a spindle controller, electrically coupled to the spindle, for driving the spindle to rotate an optical disc according to a rotation control signal; a detector, electrically coupled to the spindle controller, for detecting the rotation frequency and for generating detecting signals; a frequency-adjusting module, electrically coupled to the detector, for adjusting at least one of the detecting signals to reduce a rotation frequency difference between detecting signals; a signal selector, electrically coupled to the frequency-adjusting module, for receiving output signals generated from the frequency-adjusting module and then outputting the rotation control signal.

    Abstract translation: 一种控制电路和控制光盘驱动器中主轴的旋转频率的控制方法,所述控制电路包括:主轴控制器,其电耦合到所述主轴,用于驱动所述主轴以根据旋转控制旋转光盘 信号; 电耦合到主轴控制器的检测器,用于检测旋转频率并产生检测信号; 频率调节模块,电耦合到所述检测器,用于调整所述检测信号中的至少一个以减小检测信号之间的旋转频率差; 电耦合到频率调节模块的信号选择器,用于接收从频率调节模块产生的输出信号,然后输出旋转控制信号。

    APPARATUS AND METHOD OF GENERATING ZERO CROSSING SIGNAL FOR OPTICAL DISC DRIVE
    14.
    发明申请
    APPARATUS AND METHOD OF GENERATING ZERO CROSSING SIGNAL FOR OPTICAL DISC DRIVE 审中-公开
    用于光盘驱动的零交叉信号的生成装置和方法

    公开(公告)号:US20070280062A1

    公开(公告)日:2007-12-06

    申请号:US11758102

    申请日:2007-06-05

    Abstract: An apparatus and method of generating a zero crossing signal for an optical disc drive to reduce width deviation due to sampling effect, thereby improving servo control and detection. An embodiment of the apparatus comprises a reshaping device receiving a first digital servo signal of the optical disc drive to upsample the first digital servo signal data, thereby generating a second digital servo signal with higher resolution than the first digital servo signal; and a servo control-and-detection device receiving and slicing the second digital servo signal to generate a servo zero crossing signal.

    Abstract translation: 一种用于产生用于光盘驱动器的过零信号以减少由于采样效应引起的宽度偏差的装置和方法,从而改善伺服控制和检测。 该装置的一个实施例包括重新成形装置,接收光盘驱动器的第一数字伺服信号以对第一数字伺服信号数据进行上采样,从而产生具有比第一数字伺服信号更高分辨率的第二数字伺服信号; 以及伺服控制和检测装置,接收和分割第二数字伺服信号以产生伺服过零信号。

    CONTROL CIRCUIT AND METHOD OF CONTROLLING ROTATION FREQUENCY OF SPINDLE IN OPTICAL DISC DRIVE FOR REDUCING FREQUENCY DIFFERENCE OF OUTPUT SIGNALS RESPECTIVELY CORRESPONDING TO DIFFERENT DISC ROTATION MODES
    16.
    发明申请
    CONTROL CIRCUIT AND METHOD OF CONTROLLING ROTATION FREQUENCY OF SPINDLE IN OPTICAL DISC DRIVE FOR REDUCING FREQUENCY DIFFERENCE OF OUTPUT SIGNALS RESPECTIVELY CORRESPONDING TO DIFFERENT DISC ROTATION MODES 失效
    控制电路和控制光盘旋转驱动器的旋转频率的方法,以减少与不同碟形旋转模式相对应的输出信号的频率差异

    公开(公告)号:US20070205737A1

    公开(公告)日:2007-09-06

    申请号:US11307962

    申请日:2006-03-01

    CPC classification number: G11B19/24 H02P6/08

    Abstract: A control circuit and a control method of controlling a rotation frequency of a spindle in an optical disc drive, the control circuit comprising: a spindle controller, electrically coupled to the spindle, for driving the spindle to rotate an optical disc according to a rotation control signal; a detector, electrically coupled to the spindle controller, for detecting the rotation frequency and for generating detecting signals; a frequency-adjusting module, electrically coupled to the detector, for adjusting at least one of the detecting signals to reduce a rotation frequency difference between detecting signals; a signal selector, electrically coupled to the frequency-adjusting module, for receiving output signals generated from the frequency-adjusting module and then outputting the rotation control signal.

    Abstract translation: 一种控制电路和控制光盘驱动器中主轴的旋转频率的控制方法,所述控制电路包括:主轴控制器,其电耦合到所述主轴,用于驱动所述主轴以根据旋转控制旋转光盘 信号; 电耦合到主轴控制器的检测器,用于检测旋转频率并产生检测信号; 频率调节模块,电耦合到所述检测器,用于调整所述检测信号中的至少一个以减小检测信号之间的旋转频率差; 电耦合到频率调节模块的信号选择器,用于接收从频率调节模块产生的输出信号,然后输出旋转控制信号。

    Automatic power control system for optical disc drive and method thereof
    18.
    发明授权
    Automatic power control system for optical disc drive and method thereof 有权
    用于光盘驱动器的自动功率控制系统及其方法

    公开(公告)号:US08115661B2

    公开(公告)日:2012-02-14

    申请号:US13084098

    申请日:2011-04-11

    Abstract: A method and system for calibrating an initial driving signal for driving an optical pick-up head of an optical disk drive is provided. On one embodiment, said optical disk drive is utilized for reading or writing data on an optical disk, the optical disk includes a plurality of auto power control areas (APC areas) and a plurality of data areas, and the APC areas and the data areas are interleaved in between. In at least one of the APC areas that before the data areas for a normal data writing, an initial driving signal is used for the normal data writing to drive the optical pick-up head to emit laserbeam. A detected level of the laserbeam is then obtained. An update initial driving signal is then calibrated according to the detected level and a target level.

    Abstract translation: 提供了用于校准用于驱动光盘驱动器的光学拾取头的初始驱动信号的方法和系统。 在一个实施例中,所述光盘驱动器用于在光盘上读取或写入数据,该光盘包括多个自动功率控制区域(APC区域)和多个数据区域,以及APC区域和数据区域 在它们之间交错。 在正常数据写入的数据区之前的至少一个APC区域中,初始驱动信号用于正常数据写入以驱动光学拾取头发射激光束。 然后获得激光束的检测水平。 然后根据检测到的电平和目标电平校准更新初始驱动信号。

    Automatic Power Control System for Optical Disc Drive and Method Thereof
    20.
    发明申请
    Automatic Power Control System for Optical Disc Drive and Method Thereof 有权
    光盘驱动自动电源控制系统及其方法

    公开(公告)号:US20110188363A1

    公开(公告)日:2011-08-04

    申请号:US13084098

    申请日:2011-04-11

    Abstract: A method and system for calibrating an initial driving signal for driving an optical pick-up head of an optical disk drive is provided. On one embodiment, said optical disk drive is utilized for reading or writing data on an optical disk, the optical disk includes a plurality of auto power control areas (APC areas) and a plurality of data areas, and the APC areas and the data areas are interleaved in between. In at least one of the APC areas that before the data areas for a normal data writing, an initial driving signal is used for the normal data writing to drive the optical pick-up head to emit laserbeam. A detected level of the laserbeam is then obtained. An update initial driving signal is then calibrated according to the detected level and a target level.

    Abstract translation: 提供了用于校准用于驱动光盘驱动器的光学拾取头的初始驱动信号的方法和系统。 在一个实施例中,所述光盘驱动器用于在光盘上读取或写入数据,该光盘包括多个自动功率控制区域(APC区域)和多个数据区域,以及APC区域和数据区域 在它们之间交错。 在正常数据写入的数据区之前的至少一个APC区域中,初始驱动信号用于正常数据写入以驱动光学拾取头发射激光束。 然后获得激光束的检测水平。 然后根据检测到的电平和目标电平校准更新初始驱动信号。

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