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32 条记录 (耗时 0.091 秒)

    Optical disc system having improved circuitry for performing blank sector check on readable disc
    11.
    发明授权
    Optical disc system having improved circuitry for performing blank sector check on readable disc 失效
    具有用于对可读盘执行空白扇区检查的改进的电路的光盘系统及其操作方法

    公开(公告)号：US6069857A

    公开(公告)日：2000-05-30

    申请号：US807349

    申请日：1997-02-27

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

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

    IPC分类号： G11B7/00

    CPC分类号： G11B7/09 ,  G11B11/10576 ,  G11B7/0941 ,  G11B7/0925

    摘要： An optical disc drive system is employed in conjunction with a storage medium having a plurality of data sectors each provided with a header and a data storage area. The system includes a data detection device for retrieving stored data from the storage medium and outputting a data signal, an amplifier for providing a variable gain to the data signal and outputting an amplified data signal, a detector that is responsive to the amplified data signal for evaluating a predetermined one of the sectors to ascertain whether the storage area is blank, and an automatic gain control circuit producing a gain control output for controlling the gain of the amplifier. The control circuit has a first mode and a second mode, the first mode being active during retrieval of the header and the second mode being active during retrieval of the data storage area. The system is further provided with a sampling device for sampling the gain control output during retrieval of the stored data in a respective one of the storage areas containing previously stored data. The sampling device outputs results of the sampling, and a fixed gain control circuit is responsive to the results of the sampling for outputting a fixed gain control signal. The fixed gain control signal is applied to the amplifier during evaluation of the predetermined one of the sectors.

    摘要翻译： 光盘驱动器系统与具有多个数据扇区的存储介质结合使用，每个数据扇区分别设置有头部和数据存储区域。 该系统包括：数据检测装置，用于从存储介质检索存储的数据并输出数据信号;放大器，用于向数据信号提供可变增益，并输出放大的数据信号;响应于放大的数据信号的检测器， 评估预定的一个扇区以确定存储区域是否为空白;以及自动增益控制电路，产生用于控制放大器的增益的增益控制输出。 所述控制电路具有第一模式和第二模式，所述第一模式在检索所述报头期间是活动的，并且所述第二模式在所述数据存储区域的检索期间是活动的。 该系统还设置有采样装置，用于在检索包含先前存储的数据的存储区域的相应一个存储数据期间对增益控制输出进行采样。 采样装置输出采样结果，固定增益控制电路响应于采样结果输出固定增益控制信号。 在对预定的一个扇区进行评估期间，将固定增益控制信号施加到放大器。

    Flexure suspension for two axis actuator
    13.
    发明授权
    Flexure suspension for two axis actuator 失效
    双轴执行器的弯曲悬架

    公开(公告)号：US5313332A

    公开(公告)日：1994-05-17

    申请号：US98212

    申请日：1993-07-26

    申请人： David L. Schell ,  Leonardus J. Grassens ,  Kurt W. Getreuer

    发明人： David L. Schell ,  Leonardus J. Grassens ,  Kurt W. Getreuer

    IPC分类号： G11B7/09 ,  G11B7/00

    CPC分类号： G11B7/0932

    摘要： A device for reading information from or writing information to an optical disc memory system using light from a laser diode includes an upper and lower flexure suspension. Both flexure suspensions are mounted on both an objective lens holder and its base. Each of these flexures is U-shaped and the central part of each leg of the U is a stiff beam. At each end of the control beam is provided a tracking hinge. Outward from the tracking hinges are a pair of focusing hinges which are separated from the tracking hinges by means of spacing beam sections. The unique configuration of the system allows these parallel mounted flexures to move in only two rigid modes namely, displacement along the x-axis (tracking) and displacement along the z-axis (focusing). These two rigid modes allow the objective lens to be re-positioned so that light beams may strike the information medium correctly. The sturdiness of these beam section therefore constrains the four remaining degrees of freedom so that displacement in the y direction, namely tangential motion and rotation in the x, y and z directions, specifically roll, pitch and yaw are severely limited thus essentially eliminated. This feature is paramount in that the possibilities . for undesired skewing of the flexure and the attached objective lens are precluded.

    摘要翻译： 使用来自激光二极管的光从光盘存储器系统读取信息或向其写入信息的装置包括上和下挠曲悬架。 两个挠曲悬架均安装在物镜支架及其底座上。 这些挠曲中的每一个都是U形的，并且U的每个腿的中心部分是刚性梁。 在控制梁的每一端提供跟踪铰链。 从跟踪铰链出来的是一对聚焦铰链，其通过间隔梁部分与跟踪铰链分离。 该系统的独特配置允许这些平行安装的弯曲仅在两个刚性模式中移动，即沿着x轴的位移（跟踪）和沿z轴（聚焦）的位移。 这两种刚性模式允许物镜重新定位，使得光束可以正确地撞击信息介质。 因此，这些光束部分的坚固性限制了剩下的四个自由度，从而基本上消除了y方向上的位移，即在x，y和z方向上的切向运动和旋转，特别是滚动，俯仰和偏转。 这个功能是至关重要的，因为这些可能性。 为了防止挠曲和附着的物镜的不期望的偏斜被排除。

    Two axis electromagnetic actuator
    14.
    发明授权
    Two axis electromagnetic actuator 失效
    双轴电磁执行器

    公开(公告)号：US5136558A

    公开(公告)日：1992-08-04

    申请号：US368768

    申请日：1989-06-20

    申请人： Kurt W. Getreuer ,  Leonardus J. Grassens ,  David L. Schell

    发明人： Kurt W. Getreuer ,  Leonardus J. Grassens ,  David L. Schell

    IPC分类号： G11B7/085 ,  G11B7/09 ,  H02K41/035

    CPC分类号： H02K41/0354 ,  G11B7/08582 ,  G11B7/0935 ,  H02K41/0356

    摘要： An optical disc player/recorder incorporates a laser, and an electromagnetically driven objective lens. The objective lens is mounted to a lensholder which is movable with respect to a base. A single pair of permanent magnets are mounted to the lensholder, and two pair of electromagnetic coils are mounted to the base. The coils and magnets are positioned such that one set of coils is collinear with the direction of magnetization of the permanent magnets and the other set of coils is perpendicular to the direction of magnetization of the magnets. Electromagnetic fields generated by the coils are used to move the objective lens in either a focus direction or a tracking direction. The magnets are mounted on the moveable objective lensholder, while the coils are attached in a heat-sink relationship to the fitted base. The objective lens rests on top of the objective lensholder which is suspended with respect to the base by a pair of flexures. A mirror is provided between the flexures to allow incoming laser light to enter from the side of the optical head, thereby reducing the total overall height of the system. A position sensor may be provided to detect the position of the lensholder, relative to the base of the two axis electromagnetic actuator.

    摘要翻译： 光盘播放器/记录器包括激光器和电磁驱动的物镜。 物镜安装在相对于基座可移动的透镜架上。 一对永磁体安装在透镜架上，两对电磁线圈安装在基座上。 线圈和磁体被定位成使得一组线圈与永磁体的磁化方向共线，而另一组线圈垂直于磁体的磁化方向。 由线圈产生的电磁场用于在聚焦方向或跟踪方向上移动物镜。 磁体安装在可移动的物镜透镜座上，而线圈以与散热器关系的散热关系连接。 物镜靠在通过一对弯曲部相对于基部悬挂的物镜透镜的顶部。 在弯曲部之间设置有镜子，以允许进入的激光从光学头的侧面进入，从而减小了系统的总体总高度。 可以设置位置传感器以相对于两轴电磁致动器的基座检测透镜座的位置。

    Optical disc system and method for controlling bias coil and light source to process information on a storage medium
    15.
    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。