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21. 发明授权

US06813226B2 Calibration of a focus sum threshold in a focus servo system 有权
标题翻译：校准聚焦伺服系统中的焦点和阈值
公开(公告)号：US06813226B2
公开(公告)日：2004-11-02
申请号：US09950367
申请日：2001-09-10
申请人： Ron J. Kadlec , Charles R. Watt , Christopher J. Turner
发明人： Ron J. Kadlec , Charles R. Watt , Christopher J. Turner
IPC分类号： G11B700
CPC分类号： G11B7/0945 , G11B7/0946 , G11B7/0948
摘要： A determination of a focus sum threshold in a tracking and focus servo system of an optical disk drive is presented. The focus sum threshold can be determined by moving an optical pick-up unit sinusoidally through a focus position, for example by moving the optical pick-up unit between its closest position to an optical media and its farthest position from the optical media. While moving the optical pick-up unit, a sum signal is monitored. In some embodiments, the sum signal is the sum of signals from a plurality of detectors in the optical pick-up unit. The focus sum threshold is set to a fraction of a peak value of the sum signal.
摘要翻译：介绍了光盘驱动器的跟踪和聚焦伺服系统中焦点和阈值的确定。可以通过例如通过将光学拾取单元移动到其与光学介质的最近位置及其与光学介质的最远位置之间来正弦地移动聚焦位置来确定聚焦和阈值。移动光学拾取单元时，监视和信号。在一些实施例中，和信号是来自光学拾取单元中的多个检测器的信号的总和。焦点和阈值被设置为和信号的峰值的分数。

22. 发明授权

US07680004B2 Digital servo system with inverse non-linearity compensation 失效
标题翻译：数字伺服系统具有反向非线性补偿
公开(公告)号：US07680004B2
公开(公告)日：2010-03-16
申请号：US09950397
申请日：2001-09-10
申请人： Ron J. Kadlec , Christopher J. Turner , Charles R. Watt
发明人： Ron J. Kadlec , Christopher J. Turner , Charles R. Watt
IPC分类号： G11B7/00
CPC分类号： G11B7/094 , G11B7/0941
摘要： A servo system with in an optical disk drive with an inverse non-linearity compensation is disclosed. An error signal calculated from signals received from an optical pick-up unit can be offset by an offset value and amplified by a gain in the early stages of a calculation of a control signal for controlling a position of the optical pick-up unit. The non-linearity compensation adjusts the gain based on the offset value so that the response of the servo system to changes in the error signal is substantially linear. The error signal can be the tracking error signal in a tracking servo system and can be the focus error signal in a focus servo system.
摘要翻译：公开了具有逆非线性补偿的光盘驱动器的伺服系统。从光学拾取单元接收的信号计算的误差信号可以偏移偏移值，并且在用于控制光学拾取单元的位置的控制信号的计算的早期阶段被增益放大。非线性补偿基于偏移值来调整增益，使得伺服系统对误差信号的变化的响应基本上是线性的。误差信号可以是跟踪伺服系统中的跟踪误差信号，并且可以是聚焦伺服系统中的聚焦误差信号。

23. 发明授权

US07672199B2 Close focus algorithm in a digital focus servo system 失效
标题翻译：数字聚焦伺服系统中的近距离对焦算法
公开(公告)号：US07672199B2
公开(公告)日：2010-03-02
申请号：US09950329
申请日：2001-09-10
申请人： Ron J. Kadlec , Charles R. Watt , Christopher J. Turner
发明人： Ron J. Kadlec , Charles R. Watt , Christopher J. Turner
IPC分类号： G11B7/00
CPC分类号： G11B7/08511
摘要： A focus servo system with a focus close algorithm is disclosed. The focus close algorithm provides a bias control effort to the focus servo system when focus is closed. A method of closing focus includes positioning an optical pick-up unit at a first position away from an optical medium, moving the optical pick-up unit towards a second position by altering a focus control effort, monitoring a sum signal obtained from signals received from the optical pick-up unit, and setting the bias control effort to the focus control effort when a closure criteria is satisfied. In some embodiments, the closure criteria includes that a sum signal exceeds a threshold value. In some embodiments, the closure criteria includes that a focus error signal is below a FES threshold.
摘要翻译：公开了一种具有聚焦关闭算法的聚焦伺服系统。聚焦关闭算法在聚焦关闭时为聚焦伺服系统提供偏压控制。关闭焦点的方法包括将光学拾取单元定位在远离光学介质的第一位置处，通过改变聚焦控制力将光学拾取单元移动到第二位置，监测从从光学拾取单元，并且当满足关闭标准时，将偏置控制力设置为聚焦控制力。在一些实施例中，关闭标准包括和信号超过阈值。在一些实施例中，闭合准则包括聚焦误差信号低于FES阈值。

24. 发明授权

US07020054B2 Digital servo system with biased feed-forward 失效
公开(公告)号：US07020054B2
公开(公告)日：2006-03-28
申请号：US09950395
申请日：2001-09-10
申请人： Ron J. Kadlec , Charles R. Watt , Christopher J. Turner
发明人： Ron J. Kadlec , Charles R. Watt , Christopher J. Turner
IPC分类号： G11B7/095
CPC分类号： G11B7/08517 , G11B7/0946 , G11B7/0948 , G11B7/0953
摘要： A digital servo system with a biased feed-forward control is disclosed. The biased feed-forward control determines the low frequency component of a control signal from the digital servo system. The low frequency component can then be added to a future control signal to form an adjusted control signal. In some embodiments, the low frequency component is then removed from the future control signals. In some embodiments, a bias signal is incremented or decremented in response to the low frequency component, the bias signal being added to future control signals.

25. 发明授权

US06950380B2 Detector input dark current offset calibration in an optical disk drive digital servo 失效
标题翻译：检测器在光盘驱动器数字伺服中输入暗电流偏移校准
公开(公告)号：US06950380B2
公开(公告)日：2005-09-27
申请号：US09950512
申请日：2001-09-10
申请人： Charles R. Watt , Ron J. Kadlec , Christopher J. Turner
发明人： Charles R. Watt , Ron J. Kadlec , Christopher J. Turner
IPC分类号： G11B7/09 , G11B7/095 , G11B20/00
CPC分类号： G11B7/0945
摘要： A calibration of input signal offset in an optical disk drive is presented. The input signal offsets the input signals received from an optical pick-up unit before digitization. In some embodiments, the input signal offset is set such that the digitized input signals are zero when laser power is off. Further, a thermal drift correction is presented.
摘要翻译：介绍了光盘驱动器中输入信号偏移的校准。在数字化之前，输入信号抵消从光学拾取单元接收的输入信号。在一些实施例中，输入信号偏移被设置为使得当激光功率关闭时数字化的输入信号为零。此外，提出了热漂移校正。

26. 发明授权

US06891789B2 Tracking and focus servo system with automatic media type detector 失效
标题翻译：跟踪和聚焦伺服系统与自动介质型探测器
公开(公告)号：US06891789B2
公开(公告)日：2005-05-10
申请号：US09950361
申请日：2001-09-10
申请人： Charles R. Watt , Christopher J. Turner , Ron J. Kadlec
发明人： Charles R. Watt , Christopher J. Turner , Ron J. Kadlec
IPC分类号： G11B3/90 , G11B7/09 , G11B7/095
CPC分类号： G11B19/128
摘要： A media type detector in a tracking and focus servo system is presented. Operating parameters for a first media type are loaded and a peak-to-peak value of a tracking error signal is calculated. Whether the media type is the first media or a second media can then be determined by comparing the peak-to-peak value with a threshold value.
摘要翻译：介绍了跟踪和聚焦伺服系统中的介质型检测器。加载第一种介质类型的工作参数，并计算跟踪误差信号的峰 - 峰值。然后可以通过将峰 - 峰值与阈值进行比较来确定媒体类型是否是第一媒体或第二媒体。

27. 发明授权

US06885620B2 System and method for recovering from performance errors in an optical disc drive 失效
标题翻译：用于从光盘驱动器中的性能错误中恢复的系统和方法
公开(公告)号：US06885620B2
公开(公告)日：2005-04-26
申请号：US09951337
申请日：2001-09-10
申请人： Christopher J. Turner , Charles R. Watt , Ron J. Kadlec
发明人： Christopher J. Turner , Charles R. Watt , Ron J. Kadlec
IPC分类号： G11B7/085 , G11B7/09 , G11B7/095 , G11B7/12 , G11B7/13 , G11B7/135 , G11B19/28 , G11B7/00
CPC分类号： G11B7/1356 , G11B7/08505 , G11B7/08523 , G11B7/08529 , G11B7/08541 , G11B7/08576 , G11B7/09 , G11B7/0901 , G11B7/0912 , G11B7/0938 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/0946 , G11B7/0948 , G11B7/0953 , G11B7/0956 , G11B7/123 , G11B7/131 , G11B19/28
摘要： A system, method, and apparatus for recovering from performance errors in an optical disc drive is provided for optical media with a pitted premastered area that cannot be overwritten and a grooved user-writeable area that can be overwritten. The system includes instructions operable to detect a problem with at least one of: focus control, tracking control, or spin control when accessing the optical media; instructions operable to save the current state of the disc drive; instructions operable to attempt to recover from the problem; and instructions operable to restore the current state of the disc drive after recovering from the problem.
摘要翻译：提供了一种用于从光盘驱动器中的性能错误中恢复的系统，方法和装置，用于具有不能被覆盖的凹坑预处理区域和可被覆盖的带槽用户可写区域的光学介质。该系统包括可操作以在访问光学介质时用以下至少一个来检测问题的指令：聚焦控制，跟踪控制或旋转控制; 用于保存盘驱动器的当前状态的指令; 可以尝试从问题中恢复的说明; 以及可用于在从所述问题中恢复之后恢复所述盘驱动器的当前状态的指令。

28. 发明授权

US07038988B2 System and method for controlling time critical operations in a control system for an optical disc drive 失效
公开(公告)号：US07038988B2
公开(公告)日：2006-05-02
申请号：US09951469
申请日：2001-09-10
申请人： Christopher J. Turner , Charles R. Watt , Ron J. Kadlec
发明人： Christopher J. Turner , Charles R. Watt , Ron J. Kadlec
IPC分类号： G11B7/00
CPC分类号： G11B7/1356 , G11B7/08505 , G11B7/08523 , G11B7/08529 , G11B7/08541 , G11B7/08576 , G11B7/09 , G11B7/0901 , G11B7/0912 , G11B7/0938 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/0946 , G11B7/0948 , G11B7/0953 , G11B7/0956 , G11B7/123 , G11B7/131 , G11B19/28
摘要： A system, method, and apparatus for coordinating tasks in a control system for an optical disc drive for optical media with a pitted premastered area that cannot be overwritten and a grooved user-writeable area that can be overwritten. The optical disc drive includes a first processor operable to communicate with a second processor, wherein the first processor includes instructions for performing non-time-critical tasks, and the second processor includes instructions for performing time-critical tasks, such as reading from and writing to optical media in the disc drive. The first processor monitors the status of the time critical tasks in the second processor and transmits commands to perform operations in the second processor. The first processor also controls power mode, manages recovery from errors, controls focus, tracking/seeking, spin, physical sector address (PSA), a laser, adjusts gains, and monitor cartridge load/eject. The first processor can be used to perform other tasks while it is waiting to receive a notice of a new command, a notify event, or a performance event.

29. 发明授权

US06738320B2 System and method for moving optical pick up from current position to target position with smooth control 有权
标题翻译：将光学拾光从当前位置移动到目标位置并进行平滑控制的系统和方法
公开(公告)号：US06738320B2
公开(公告)日：2004-05-18
申请号：US09950408
申请日：2001-09-10
申请人： Ron J. Kadlec , Christopher J. Turner , Charles R. Watt
发明人： Ron J. Kadlec , Christopher J. Turner , Charles R. Watt
IPC分类号： G11B2108
CPC分类号： G11B7/0901 , G11B7/0908
摘要： A method of changing the position of a component controlled by a servo system is disclosed. In accordance with the disclosed invention, the current position and the current control signal corresponding to the current position is determined. A target control signal corresponding to a target position is also determined. A smooth control signal profile is then calculated between the current control signal and the target control signal. The smooth control signal is then applied to move the component form the current position to the target position. In some embodiments, the smooth control signal can be, for example, a half-period sine wave with one extreme at the current control signal and the opposite extreme at the target control signal.
摘要翻译：公开了一种改变由伺服系统控制的部件的位置的方法。根据所公开的发明，确定与当前位置对应的当前位置和电流控制信号。还确定与目标位置对应的目标控制信号。然后在电流控制信号和目标控制信号之间计算平滑的控制信号分布。然后施加平滑的控制信号以将组件从当前位置移动到目标位置。在一些实施例中，平滑控制信号可以是例如在电流控制信号处具有一个极端的半周期正弦波，并且在目标控制信号处的相反极点。

30. 发明授权

US07492675B2 Digital servo system with calibrated notch filters 有权
公开(公告)号：US07492675B2
公开(公告)日：2009-02-17
申请号：US09950372
申请日：2001-09-10
申请人： Ron J. Kadlec , Hans B. Wach
发明人： Ron J. Kadlec , Hans B. Wach
IPC分类号： G11B7/00
CPC分类号： G11B7/0945 , G11B7/0946
摘要： A system which calibrates notch filters in a digital servo system is presented. A notch filter can be calibrated by obtaining a frequency response curve of the digital servo system in a range of frequencies, searching the frequency response curve for at least one peak frequency, and adjusting parameters of the notch filter to filter out signals at the at least one peak frequency. The digital servo system, for example, can be a tracking servo system or a focus servo system of an optical disk drive.

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