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33 条记录 (耗时 0.107 秒)

    Optical disc system and method for controlling bias coil and light source to process information on a storage medium
    1.
    发明授权
    Optical disc system and method for controlling bias coil and light source to process information on a storage medium 失效
    用于控制偏置线圈和光源以处理存储介质上的信息的光盘系统和方法

    公开(公告)号：US06434087B1

    公开(公告)日：2002-08-13

    申请号：US08479305

    申请日：1995-06-07

    申请人： David L. Schell ,  David E. Lewis

    发明人： David L. Schell ,  David E. Lewis

    IPC分类号： G11B1100

    CPC分类号： G11B11/10595 ,  G11B11/10506 ,  G11B11/10534 ,  G11B11/10558

    摘要： An optical disc system for storing information on a medium includes a light source, a focusing mechanism, and a tracking mechanism wherein the mechanisms are controlled by a feedback loop and the focusing mechanism focuses light emitted by the light source onto the medium to effect writing of information thereon. The system is provided with an electronic circuit for generating a servo error signal that is communicated in the feedback loop for effecting corrections of the focusing mechanism and the tracking mechanism. The system is further provided with a driver for energizing the light source, a bias coil disposed proximate to the medium, a bias coil driver switchably connected to the bias coil for supplying an electric current thereto, a current monitoring circuit connected to the bias coil driver having an output responsive to the electric current, and a controller connected to the output of the current monitoring circuit and to the driver. The controller thereby enables the driver when the output of the current monitoring circuit exceeds a predetermined magnitude so that information processed through the focusing mechanism is written onto the medium when the electric current flowing in the bias coil exceeds a threshold.

    摘要翻译： 用于在介质上存储信息的光盘系统包括光源，聚焦机构和跟踪机构，其中机构由反馈回路控制，并且聚焦机构将由光源发射的光聚焦到介质上以实现写入 有关信息。 该系统设置有用于产生伺服误差信号的电子电路，该伺服误差信号在反馈回路中传送以实现聚焦机构和跟踪机构的校正。 该系统还设置有用于激励光源的驱动器，靠近介质设置的偏置线圈，可切换地连接到偏置线圈以提供电流的偏置线圈驱动器，连接到偏置线圈驱动器的电流监视电路 具有响应于电流的输出，以及连接到电流监视电路的输出和驱动器的控制器。 因此，当电流监视电路的输出超过预定量值时，控制器使得驱动器能够使得当在偏置线圈中流动的电流超过阈值时，通过聚焦机构处理的信息被写入到介质上。

    Optical disk tracking and seeking systems and specific track formats using servo areas
    8.
    发明授权
    Optical disk tracking and seeking systems and specific track formats using servo areas 失效
    光盘跟踪和寻道系统以及使用伺服区的特定轨迹格式

    公开(公告)号：US4914645A

    公开(公告)日：1990-04-03

    申请号：US147690

    申请日：1988-01-25

    申请人： Kurt W. Getreuer ,  Johannes J. Verboom ,  David L. Schell ,  David E. Lewis ,  Gregory V. Hofer ,  Kathleen M. Connelly ,  James C. McDonald ,  Pierre R. Sonneville ,  Cees van Nimwegen

    发明人： Kurt W. Getreuer ,  Johannes J. Verboom ,  David L. Schell ,  David E. Lewis ,  Gregory V. Hofer ,  Kathleen M. Connelly ,  James C. McDonald ,  Pierre R. Sonneville ,  Cees van Nimwegen

    IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/013 ,  G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/0938 ,  G11B7/085 ,  G11B7/0901 ,  G11B7/24085

    摘要： An optical disk recording system including a record medium is disclosed for providing an accurate track crossing count and an accurate track following signal. A first embodiment utilizes off-centered wobbled areas located in the headers of the record medium. The high frequency content of a first signal is combined with the low frequency content of a second signal, which is generated using the wobbled areas. In another embodiment, light-reflective discontinuities are provided in the header areas of the record medium. A qualifier and an AGC are utilized in providing a corrected track following signal. In still another embodiment, reflective discontinuities are located in the servo areas of the record medium. In such an embodiment, it is preferred that there is a fixed gain adjustment to a radial push-pull signal. With regard to each of the three aforesaid embodiments, a track following signal is corrected to compensate for aberrations that are caused by a shift of the light beam returned from the record medium surface. In yet another embodiment, the track following signal is generated using only the central aperture or wobble signal. In this embodiment, it is preferred that three pits be utilized in connection with the track following operation. The three pits are provided in two servo bytes of information located in the servo areas. Two of the three pits are wobble pits and the third pit is used in clocking.

    摘要翻译： 公开了一种包括记录介质的光盘记录系统，用于提供准确的轨道交叉计数和准确跟踪信号。 第一实施例使用位于记录介质的头部中的偏心摆动区域。 第一信号的高频内容与使用摆动区域产生的第二信号的低频内容组合。 在另一个实施例中，在记录介质的标题区域中提供光反射不连续性。 使用限定符和AGC来提供校正后的跟踪信号。 在另一个实施例中，反射不连续性位于记录介质的伺服区域中。 在这样的实施例中，优选的是对径向推挽信号进行固定增益调整。 对于上述三个实施例中的每一个，对跟踪跟踪信号进行校正，以补偿由从记录介质表面返回的光束的偏移引起的像差。 在另一个实施例中，仅使用中心孔径或摆动信号产生跟踪信号。 在该实施例中，优选地，跟踪跟踪操作结合使用三个凹坑。 三个凹坑位于伺服区域的两个伺服字节的信息中。 三个凹坑中的两个是摆动凹坑，第三个凹坑用于计时。

    Optical drive error tracking method and apparatus
    10.
    发明授权
    Optical drive error tracking method and apparatus 有权
    光驱误差跟踪方法及装置

    公开(公告)号：US06233210B1

    公开(公告)日：2001-05-15

    申请号：US09169368

    申请日：1998-10-09

    申请人： David L. Schell

    发明人： David L. Schell

    IPC分类号： G11B713

    CPC分类号： G11B7/0901

    摘要： A method and apparatus provides an improved optical storage disk player. An improved method and apparatus for obtaining a tracking error signal for an optical disk player is disclosed which is general across the various data formats found in CD audio disks, CD-ROMs, and digital video disks. The present invention uses a photodetector with at least four active areas to sense the reflected laser beam. A differential amplitude tracking error signal is generated by comparing the signal strength in the different active areas.

    摘要翻译： 一种方法和装置提供一种改进的光存储盘播放器。 公开了一种用于获得光盘播放器的跟踪误差信号的改进方法和装置，其通常在CD音频盘，CD-ROM和数字视频盘中发现的各种数据格式之间。 本发明使用具有至少四个有源区域的光电检测器来感测反射的激光束。 通过比较不同有效区域中的信号强度来产生差分幅度跟踪误差信号。