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    METHOD OF MINIMIZING HEAD-ARM MOVEMENTS IN A DISK DRIVE
    3.
    发明公开
    METHOD OF MINIMIZING HEAD-ARM MOVEMENTS IN A DISK DRIVE 失效
    在磁盘驱动器中最小化头臂运动的方法

    公开(公告)号：EP0453192A3

    公开(公告)日：1991-11-06

    申请号：EP91303253

    申请日：1991-04-12

    申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

    发明人： FREY, ALEXANDER H., JR.

    IPC分类号： G11B5/596 ,  G11B19/14 ,  G11B21/08 ,  G11B27/10 ,  G11B5/55

    CPC分类号： G11B21/083 ,  G11B19/14

    摘要： The method of the invention is performed on a disk drive with at least a rotatable disk and a head/arm mechanism movable thereover. The disk has a plurality of concentric tracks, including innermost and outermost tracks and an intermediate track positioned therebetween, with the intermediate track including often-used records. The method reduces movements of the head/arm mechanism through the steps of:

    a. positioning the head/arm mechanism over the intermediate track;
    b. moving the head/arm mechanism away from the intermediate track to another track to perform a requested read operation;
    c. moving the head/arm mechanism back to the intermediate track from the further track and performing write actions in tracks over which the head/arm mechanism moves in its treaversal back to the intermediate track.

    Method of minimizing head-arm movements in a disk drive
    4.
    发明公开
    Method of minimizing head-arm movements in a disk drive 失效
    Verafahren zur Minimierung der Kopf- / Armbewegung在einer Platteneinheit。

    公开(公告)号：EP0453192A2

    公开(公告)日：1991-10-23

    申请号：EP91303253.8

    申请日：1991-04-12

    申请人： International Business Machines Corporation

    发明人： Frey, Alexander H., Jr.

    IPC分类号： G11B21/08 ,  G11B5/55 ,  G11B5/012 ,  G11B19/14

    CPC分类号： G11B21/083 ,  G11B19/14

    摘要： The method of the invention is performed on a disk drive with at least a rotatable disk and a head/arm mechanism movable thereover. The disk has a plurality of concentric tracks, including innermost and outermost tracks and an intermediate track positioned therebetween, with the intermediate track including often-used records. The method reduces movements of the head/arm mechanism through the steps of :

    a. positioning the head/arm mechanism over the intermediate track;
    b. moving the head/arm mechanism away from the intermediate track to another track to perform a requested read operation ;
    c. moving the head/arm mechanism back to the intermediate track from the further track and performing write actions in tracks over which the head/arm mechanism moves in its treaversal back to the intermediate track.

    摘要翻译： 本发明的方法在具有至少可旋转盘的磁盘驱动器和在其上可移动的头/臂机构执行。 盘具有多个同心轨道，包括最内轨道和最外轨道以及位于其间的中间轨道，中间轨道包括经常使用的记录。 该方法通过以下步骤减少头/臂机构的运动：a。 将头/臂机构定位在中间轨道上; 湾 将头/臂机构从中间轨道移动到另一轨道以执行所请求的读操作; C。 将头/臂机构从另外的轨道移回到中间轨道，并且在磁头/臂机构在其横向移动回到中间轨道的轨道上执行写入动作。

    Mode switching device in a disc playback device
    5.
    发明公开
    Mode switching device in a disc playback device 失效
    DISC回放装置中的模式切换装置

    公开(公告)号：EP0174590A3

    公开(公告)日：1988-05-25

    申请号：EP85111097

    申请日：1985-09-03

    申请人： Nippon Gakki Seizo Kabushiki Kaisha

    发明人： Kamoshita, Yasuhiko

    IPC分类号： G11B19/14

    CPC分类号： G11B17/057 ,  G11B19/14 ,  G11B19/16

    摘要： A mode switching device in a disc playback device comprises a loading device (111) transferring a disc or a case (A) housing a disc between an eject position in which the disc or the disc case is inserted and ejected and a palyback position in which the disc is palyed, a feed device (92) for feeding a pickup head (81) reading data recorded on the disc set in a playback position and a mode switching device (112) for switching the made between loading, eject and palyback mades. The feed device can move across an overstroke region extending radially outwardly of a read-out position of the pickup head and the mode switching device performs switching of the mode when the feed device has reached a predetermined position in the overstroke region.

    Objective lens driving apparatus
    8.
    发明公开
    Objective lens driving apparatus 失效
    AntriebsvorrichtungfürObjektivlinse

    公开(公告)号：EP0773538A3

    公开(公告)日：1998-03-18

    申请号：EP96117968.6

    申请日：1996-11-08

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Yoshizawa, Takashi, c/o Kabushiki Kaisha Toshiba

    IPC分类号： G11B7/09 ,  G11B7/135 ,  G11B19/14

    CPC分类号： G11B7/13925 ,  G11B7/0935 ,  G11B7/1374 ,  G11B7/139 ,  G11B19/12 ,  G11B19/14 ,  G11B2007/0006

    摘要： A lens holder (75) is provided with objective lenses (34, 35) of different types. Rotating the lens holder (75) causes one of the objective lenses (34, 35) to be placed in the optical path of the laser beam. Near one objective lens (35), there is provided a reflecting element (92) that reflects part of the laser beam directed to the objective lens (35). When the objective lens (35) is put in the optical path, the beam from the reflecting element (92) is sensed by a sensor. From the sensing result, it is judged that a specific type of objective lens (35) is in the optical path. Accordingly, there is provided an objective lens driving apparatus that includes at least two objective lenses with different numerical apertures according to optical information recording mediums complying with different standards, is capable of switching between the objective lenses according to the optical information recording medium to be used, and further has a simple structure capable of identifying the type of the objective lens selected by switching.

    摘要翻译： 透镜架（75）设有不同类型的物镜（34,35）。 旋转透镜架（75）使物镜（34,35）中的一个被放置在激光束的光路中。 在一个物镜（35）附近，设置有反射部件（92），反射部分被引导到物镜（35）。 当将物镜（35）放入光路时，来自反射元件（92）的光束由传感器感测。 从感测结果可以看出，特定类型的物镜（35）在光路中。 因此，提供了一种物镜驱动装置，其具有根据符合不同标准的光信息记录介质，具有不同数值孔径的至少两个物镜，能够根据要使用的光信息记录介质在物镜之间切换 并且还具有能够识别通过切换选择的物镜的类型的简单结构。

    Recording and/or reproducing data on a disk
    9.
    发明公开
    Recording and/or reproducing data on a disk 失效
    在磁盘上记录和/或复制数据。

    公开(公告)号：EP0599628A3

    公开(公告)日：1994-09-14

    申请号：EP93309367.6

    申请日：1993-11-24

    申请人： SONY CORPORATION

    发明人： Shirane, Kyoichi, c/o Int. Property Division

    IPC分类号： G11B19/14

    CPC分类号： G11B19/24 ,  G11B19/14 ,  G11B20/10

    摘要： When recording and/or reproducing data on a disk formatted in accordance with a constant linear velocity (CLV) system while the disk is rotated and a head is movable in a radial direction relative to the disk for scanning radially successive circular tracks thereon, and a recording and/or reproducing circuit is operable in response to a data transfer clock for causing the head to record and/or reproduce data in the tracks scanned thereby : the disk is virtually divided into a plurality of virtual zones (Fig. 1A) arranged successively in the radial direction and each comprised of a respective plurality of the tracks ; the frequency of the data transfer clock (Fig. 1B) is determined in dependence on the one of the virtual zones in which the tracks being scanned are situated at least during the initiation of a recording or reproducing operation, with the frequency determined at the initiation of a recording or reproducing operation being increased step wise for each of the successive zones considered in the radially outward direction and being maintained substantially constant at least so long as the tracks being scanned are in the one of the zones at which the recording or reproducing operation was initiated ; and the angular velocity (Fig. 1C) at which the disk is rotated during the recording or reproducing of data in the tracks within any one of the virtual zones is decreased as successive tracks, considered in the radially outward direction, are scanned during the recording or reproducing operation in which the frequency of the data transfer clock is maintained substantially constant.