公开(公告)号：US20040257947A1

公开(公告)日：2004-12-23

申请号：US10600637

申请日：2003-06-20

申请人： Motorola, Inc.

发明人： David A. Hayner ,  Maureen A. Stengler

IPC分类号： G11B007/095

CPC分类号： G11B7/09 ,  G05B11/32 ,  G11B7/0901 ,  G11B7/0908

摘要： A low-cost technique to improve the performance of optical disk drives is presented. An algorithm is used to decouple electro-mechanical actuators thus compensating for inaccuracies in the control of the actuators. A similar method can be used to decouple the position sensors. Prior art methods treated cross-coupling between focus, tracking and sled control loops as noise and therefore increased the bandwidth of the system, also increasing the cost of the optical disk drive. The present disclosure actively decouples the control loops using a software algorithm to provide better performing optical disk drives. The cross-coupling effects are measured, a decoupling matrix is determined, and the output of the control laws is modified so as to decouple the actuators.

摘要翻译： 介绍了一种提高光盘驱动器性能的低成本技术。 使用一种算法来解耦电机械致动器，从而补偿致动器控制中的不准确性。 可以使用类似的方法来解耦位置传感器。 现有技术的方法将聚焦，跟踪和滑动控制环路之间的交叉耦合作为噪声，从而增加了系统的带宽，同时也增加了光盘驱动器的成本。 本公开使用软件算法主动地分离控制回路以提供更好的执行光盘驱动器。 测量交叉耦合效应，确定解耦矩阵，并且修改控制律的输出以便使致动器解耦。

公开(公告)号：US20040213098A1

公开(公告)日：2004-10-28

申请号：US10423992

申请日：2003-04-25

发明人： Daniel R. Marshall

IPC分类号： G11B009/10 ,  G11B007/095

CPC分类号： B82Y10/00 ,  G11B7/0914 ,  G11B9/10 ,  G11B9/14 ,  G11B9/1418 ,  G11B9/1445

摘要： A focus-detecting emitter for a data storage device is provided, such focus-detecting emitter including a first emission zone configured to selectively produce a first electron beam portion, and a second emission zone configured to selectively produce a second electron beam portion. The first electron beam portion generates a first spot on a storage medium and the second electron beam portion generates a second spot on the storage medium such that a position of at least one of the first spot and the second spot is indicative of a focus state of at least one of the first electron beam portion and the second electron beam portion.

摘要翻译： 提供了一种用于数据存储装置的对焦检测发射器，该对焦检测发射器包括被配置为选择性地产生第一电子束部分的第一发射区域和被配置为选择性地产生第二电子束部分的第二发射区域。 第一电子束部分在存储介质上产生第一点，并且第二电子束部分在存储介质上产生第二点，使得第一点和第二点中的至少一个的位置指示聚焦状态 第一电子束部分和第二电子束部分中的至少一个。

公开(公告)号：US20040196766A1

公开(公告)日：2004-10-07

申请号：US10485404

申请日：2004-01-30

发明人： Hiroyuki Tadano

IPC分类号： G11B005/58 ,  G11B007/00 ,  G11B007/09 ,  G11B007/095 ,  G11B011/03 ,  G11B011/105 ,  G11B011/11 ,  G11B011/115 ,  G11B011/12 ,  G11B015/04 ,  G11B019/04 ,  G11B020/18 ,  G11B027/36

CPC分类号： G11B7/13927 ,  G11B7/0908 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/0945 ,  G11B7/0948 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0013 ,  G11B2007/13727

摘要： A focus control process (S2), a spherical aberration correcting process (S4), and a focus offset adjusting process (S7 to S9) are performed in this order. In the focus control process, an output of a focus error signal obtained by detecting focal point displacement that occurs in a direction of an optical axis of a light beam focused through a two-element object lens is controlled so that the output becomes close to zero. In the spherical aberration correcting process, spherical aberration that occurs with respect to the light beam is corrected. In the focus offset adjusting process, offset of the focus error signal is adjusted. In this way, it is possible to provide a focal point adjusting method and an optical pickup device in which focus control can be performed stably by eliminating the offset.

摘要翻译： 以此顺序执行聚焦控制处理（S2），球面像差校正处理（S4）和聚焦偏移调整处理（S7至S9）。 在聚焦控制处理中，控制通过检测在通过双元件物镜聚焦的光束的光轴的方向上发生的焦点位移获得的聚焦误差信号的输出，使得输出接近于零 。 在球面像差校正处理中，校正相对于光束发生的球面像差。 在对焦偏移调整处理中，调整聚焦误差信号的偏移。 以这种方式，可以提供一种可以通过消除偏移来稳定地进行聚焦控制的焦点调节方法和光学拾取装置。

公开(公告)号：US20040196756A1

公开(公告)日：2004-10-07

申请号：US10404379

申请日：2003-04-01

申请人： VIA TECHNOLOGIES, INC.

发明人： Meng-Huang Chu

IPC分类号： G11B007/095

CPC分类号： G11B7/0945 ,  G11B7/0953

摘要： An optical storage system includes a pickup head for picking up data from a storage medium. Firstly, the maxima of a tracking error signal and runout are obtained in a calibration procedure in a close loop formed by an optical pickup head, a pre-amplifier, a compensator, a band-pass filter and a maximum detector. A calibration factor is then defined and derived by using the obtained maxima and nominal factors of a power amplifier and the optical pickup head of the optical storage system. The path formed by the series-connected band-pass filter and maximum detector is then disabled, while the calculated calibration factor is then stored in the compensator. The optical storage system may operate in a close loop formed by the optical pick head, pre-amplifier, compensator, a power amplifier under a normal operation procedure so that the optical storage system may record or read data onto/from an optical disc under the compensation provided by the calibration factor.

摘要翻译： 光学存储系统包括用于从存储介质拾取数据的拾取头。 首先，在由光拾取头，前置放大器，补偿器，带通滤波器和最大检测器形成的闭环中的校准过程中获得跟踪误差信号和跳动的最大值。 然后通过使用获得的功率放大器和光学存储系统的光学拾取头的最大值和标称因数来定义和导出校准因子。 然后由串联连接的带通滤波器和最大检测器形成的路径被禁用，而计算的校准因子然后存储在补偿器中。 光存储系统可以在由光拾取头，前置放大器，补偿器，功率放大器在正常操作程序下形成的闭​​环中操作，使得光学存储系统可以在/ 补偿由校准因子提供。

公开(公告)号：US20040170094A1

公开(公告)日：2004-09-02

申请号：US10786554

申请日：2004-02-26

发明人： Shintaro Takehara

IPC分类号： G11B007/095

CPC分类号： G11B7/0906 ,  G11B7/0943

摘要： A disk apparatus according to one aspect of this invention comprises a photodetection unit configured to divisionally detect light reflected by the disk as a plurality of photodetection signals, and a tracking error signal generation unit configured to generate a tracking error signal on the basis of a phase difference between the plurality of photodetection signals detected by the photodetection unit, wherein the tracking error signal generation unit includes an equalization unit configured to equalize waveforms of the plurality of photodetection signals detected by the photodetection unit, and the equalization unit has frequency-gain characteristics that obtain a gain of not less than 15 dB at a frequency corresponding to a shortest pit or mark.

摘要翻译： 根据本发明的一个方面的盘装置包括：光检测单元，被配置为将由盘反射的光分为多个光检测信号;以及跟踪误差信号生成单元，被配置为基于相位产生跟踪误差信号 由光检测单元检测的多个光检测信号之间的差异，其中跟踪误差信号生成单元包括均衡单元，其被配置为均衡由光检测单元检测的多个光检测信号的波形和均衡单元，具有频率增益特性， 在对应于最短凹坑或标记的频率处获得不小于15dB的增益。

公开(公告)号：US20040141433A1

公开(公告)日：2004-07-22

申请号：US10624556

申请日：2003-07-23

申请人： Samsung Electronics Co., Ltd.

发明人： Yong-seok Yoon ,  Soo-yul Jung

IPC分类号： G11B007/095

CPC分类号： G11B7/0901 ,  G11B7/08541 ,  G11B7/095

摘要： A method, apparatus, and computer readable medium controlling a servo of a recording and/or reproducing apparatus, using a detected header field signal. An optical recording and/or reproducing apparatus includes a playback signal detector that detects a playback signal and a track error signal from information recorded on a DVD-RAM disc, as picked up by a pickup. A header field signal detecting circuit detects a header field signal by comparing a sampled playback signal for a signal representing the presence of a header field with a reference level and holding the comparison result for a predetermined period of time to generate the header field signal. Accordingly, a tracking servo can be stably controlled by using a tracking driving signal that is not affected by the presence of a header. Also, in a seek mode, the track error signal can be held based on the header field signal to generate a track count signal that is similarly not affected by the header. As a result, the number of tracks on the DVD-RAM disc can be accurately counted by using the track error signal.

摘要翻译： 一种使用检测到的标题字段信号来控制记录和/或再现装置的伺服的方法，装置和计算机可读介质。 光学记录和/或再现装置包括重放信号检测器，其由拾取器拾取的从记录在DVD-RAM盘上的信息中检测回放信号和轨道误差信号。 报头字段信号检测电路通过将表示标题字段的存在的信号的采样重放信号与参考电平进行比较并且将比较结果保持预定时间段来生成报头字段信号来检测报头字段信号。 因此，可以通过使用不受标题的存在影响的跟踪驱动信号来稳定地控制跟踪伺服。 此外，在搜索模式中，可以基于标题字段信号来保持轨道误差信号，以产生类似地不受报头影响的轨道计数信号。 结果，可以通过使用轨道误差信号来精确地计数DVD-RAM盘上的轨道数。

公开(公告)号：US20040136282A1

公开(公告)日：2004-07-15

申请号：US10743147

申请日：2003-12-23

发明人： Chih-Yuan Chen

IPC分类号： G11B007/095

CPC分类号： G11B7/0945 ,  G11B7/094

摘要： A method for calibrating a center error offset in an optical drive and a control system capable of calibrating the center error offset. The method includes the steps of: controlling a focusing coil to focus on a rotating disk; controlling a tracking coil with different tracking coil control values; measuring and storing the amplitude of a tracking error TE signal and a center level of the center error CE signal responding to each control value; and selecting a largest amplitude of the tracking error TE signal and setting the responding center level of the center error CE signal as an optimal center error offset. Because the calibrating method determines the optimal center error offset by outputting different tracking coil control signals, it considers not only the unbalance of the gains of photo detectors and the optical deviation due to the assembly misalignment, but also the offset in a power drive.

摘要翻译： 用于校准光学驱动器中的中心误差偏移的方法和能够校准中心误差偏移的控制系统。 该方法包括以下步骤：控制聚焦线圈聚焦在旋转盘上; 控制具有不同跟踪线圈控制值的跟踪线圈; 响应于每个控制值测量和存储跟踪误差TE信号的幅度和中心误差CE信号的中心电平; 并选择跟踪误差TE信号的最大振幅，并将中心误差CE信号的响应中心电平设置为最佳中心误差偏移。 由于校准方法通过输出不同的跟踪线圈控制信号来确定最佳的中心误差偏移，因此不仅考虑光电检测器的增益的不平衡以及由于组装不对准引起的光学偏差，还考虑了功率驱动器中的偏移。

公开(公告)号：US20040136279A1

公开(公告)日：2004-07-15

申请号：US10342017

申请日：2003-01-13

发明人： Andrew Koll ,  Andrew L. Van Brocklin ,  Darwin Mitchel Hanks

IPC分类号： G11B007/095

CPC分类号： G11B7/0037 ,  G11B7/0956

摘要： A method of one embodiment of the invention is disclosed that determines optical disc vertical displacement information at a number of positions on an optical disc. The method interpolates optical disc vertical displacement information at a number of other positions on the optical disc from the vertical displacement information determined.

摘要翻译： 公开了本发明的一个实施例的方法，其确定在光盘上的多个位置处的光盘垂直位移信息。 该方法根据所确定的垂直位移信息在光盘上的其它位置上插入光盘垂直位移信息。

公开(公告)号：US20040130976A1

公开(公告)日：2004-07-08

申请号：US10671612

申请日：2003-09-29

发明人： Akihiro Tanaka

IPC分类号： G11B007/095

CPC分类号： G11B7/0935 ,  G11B7/0933 ,  G11B7/0956

摘要： A lens actuator includes a lens holder to support an objective lens and having a pair of first side surfaces in a tracking direction and a pair of second side surfaces in a tangential direction, a fixed magnet disposed to confront the second side surface and comprising four regions having approximately the same area and are magnetic, such that magnetic directions of the four regions are perpendicular to a plane including a focusing direction and the tracking direction but are in opposite directions between two mutually adjacent regions, a pair of tracking coils disposed between the second surface and the magnet and having centers located on an outer side of corresponding centers of the four regions in the tracking direction, a focusing coil disposed between the second surface and the magnet and having a center located on an outer side of corresponding centers of the four regions in the focusing direction, and a radial tilt coil disposed between the second surface and the magnet and having a center located on an outer side of corresponding centers of the four regions in the focusing direction.

摘要翻译： 透镜致动器包括：透镜保持器，用于支撑物镜并具有在跟踪方向上的一对第一侧表面和沿切线方向的一对第二侧表面;固定磁铁，设置成面对第二侧表面并且包括四个区域 具有大致相同的面积并且是磁性的，使得四个区域的磁方向垂直于包括聚焦方向和跟踪方向的平面，但是在两个相互相邻的区域之间处于相反的方向，一对跟踪线圈设置在第二 表面和磁体，并且具有位于跟踪方向上的四个区域的对应中心的外侧上的中心，设置在第二表面和磁体之间的聚焦线圈，并且具有位于四个区域的相应中心的外侧的中心 聚焦方向的区域和设置在第二表面和磁体之间的径向倾斜线圈 位于沿聚焦方向的四个区域的对应中心的外侧的中心。

公开(公告)号：US20040081039A1

公开(公告)日：2004-04-29

申请号：US10692042

申请日：2003-10-22

申请人： TEAC Corporation

发明人： Koji Naraoka

IPC分类号： G11B007/095

CPC分类号： G11B7/0956 ,  G11B7/0933 ,  G11B7/0937

摘要： An objective lens drive having an optical axis adjustment function. An objective lens is supported by a lens holder, and the lens holder is supported on a suspension holder by way of a suspension. The suspension holder is supported so as to be rotatable about an axis extending in a direction in which the suspension extends, whereby the suspension holder is supported laterally by means of multilayer piezoelectric elements. When a drive voltage is applied to the multilayer piezoelectric elements, the piezoelectric elements are displaced vertically, whereupon the suspension holder is rotated about the axis, to thus adjust the optical axis of the objective lens.

摘要翻译： 具有光轴调节功能的物镜驱动器。 物镜由透镜支架支撑，透镜支架通过悬架支撑在悬挂支架上。 悬架保持器被支撑成可以围绕在悬架延伸的方向上延伸的轴线旋转，由此悬架保持器通过多层压电元件横向支撑。 当对多层压电元件施加驱动电压时，压电元件垂直移位，随后悬架保持器围绕轴线旋转，从而调节物镜的光轴。