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10 条记录 (耗时 0.032 秒)

    Track jump control means for a disk apparatus
    3.
    发明授权
    Track jump control means for a disk apparatus 失效
    用于盘装置的跟踪跳转控制装置

    公开(公告)号：US5481517A

    公开(公告)日：1996-01-02

    申请号：US93440

    申请日：1993-07-16

    申请人： Kyosuke Yoshimoto ,  Yoshiki Nakajima ,  Kimiyuki Koyanagi ,  Osamu Ito ,  Akira Mashimo ,  Hiroyuki Onda ,  Yutaka Kobayashi ,  Koji Yamana

    发明人： Kyosuke Yoshimoto ,  Yoshiki Nakajima ,  Kimiyuki Koyanagi ,  Osamu Ito ,  Akira Mashimo ,  Hiroyuki Onda ,  Yutaka Kobayashi ,  Koji Yamana

    IPC分类号： G11B21/08 ,  G11B7/085 ,  G11B7/00

    CPC分类号： G11B7/08517

    摘要： The disk drive apparatus of the present invention has an optical pickup that jumps a track to perform track jumping when a jumping voltage is impressed, and that traces a track by performing brake operation when a braking voltage is applied, and actuator that drives the optical pickup, a signal processing part that performs focus and tracking control with respect to the optical pickup, a movement time measurement part that measures the movement time when a light beam emitted from the optical pickup is moved to cross a track to a required track, a voltage control part that uses the results of measurement to generate parameters and a voltage value that is applied to the actuator, a storage part that stores voltage value that is generated by the voltage value setting part, and that after a disk is loaded, first stores data of that disk in the storage part and uses those data values according to the track jump operation.

    摘要翻译： 本发明的磁盘驱动装置具有跳跃轨道的光拾取器，当施加跳跃电压时进行轨道跳跃，并且当施加制动电压时通过执行制动操作来跟踪轨道，以及驱动光学拾取器的致动器 执行相对于光学拾取器的聚焦和跟踪控制的信号处理部件，测量从光学拾取器发射的光束移动到所需轨道的轨迹的移动时间的移动时间测量部件，电压 使用测量结果的控制部件生成参数和施加到致动器的电压值，存储部分，其存储由电压值设定部分产生的电压值，以及在盘装载之后首先存储数据 并且根据轨道跳转操作使用那些数据值。

    Optically modulated overwritable recording device
    4.
    发明授权
    Optically modulated overwritable recording device 失效
    光调制可重写记录装置

    公开(公告)号：US5475666A

    公开(公告)日：1995-12-12

    申请号：US25944

    申请日：1993-03-03

    申请人： Masaya Ito ,  Osamu Ito ,  Kouichi Yamada ,  Masayoshi Shimamoto ,  Yoshiki Nakajima ,  Kouichi Takeuchi ,  Kyousuke Yoshimoto

    发明人： Masaya Ito ,  Osamu Ito ,  Kouichi Yamada ,  Masayoshi Shimamoto ,  Yoshiki Nakajima ,  Kouichi Takeuchi ,  Kyousuke Yoshimoto

    IPC分类号： G11B7/0045 ,  G11B7/125 ,  G11B11/105 ,  G11B7/00

    CPC分类号： G11B11/10595 ,  G11B11/10521 ,  G11B7/0045 ,  G11B7/126 ,  G11B11/10506

    摘要： A recording device for recording information upon optically modulated overwritable magneto-optical recording medium including four magnetic layers first records DC "1" and then a test signal at high and low recording laser power levels upon a test track of the recording medium. The high and low recording laser power levels are successively modified to scan a two-dimensional region of the high and low recording laser power levels, and the optimal high and low recording laser power levels are determined on the basis of the reproduction signal levels corresponding to respective combination of high and low recording laser power levers. The reproduction signal levels are represented upon the .alpha.-K plane which is divided into six characteristic regions, The optimal combination of high and low recording laser power levels is determined as a representative point within the region of correct reproduction with a predetermined allowance.

    摘要翻译： 用于在包括四个磁性层的光调制可重写磁光记录介质上记录信息的记录装置首先在记录介质的测试轨迹上记录DC“1”，然后记录高和低记录激光功率电平的测试信号。 连续修改高低记录激光功率电平以扫描高和低记录激光功率电平的二维区域，并且基于对应于...的再现信号电平来确定最佳高和低记录激光功率电平 各种组合的高低记录激光功率杆。 再现信号电平在被划分为六个特征区域的α-K平面上表示。将高和低记录激光功率电平的最佳组合确定为具有预定余量的正确再现区域内的代表点。

    Signal decoding apparatus and method
    5.
    发明授权
    Signal decoding apparatus and method 失效
    信号解码装置及方法

    公开(公告)号：US5070492A

    公开(公告)日：1991-12-03

    申请号：US317197

    申请日：1989-02-28

    申请人： Masaharu Ogawa ,  Yoshiki Nakajima ,  Osamu Ito ,  Teruo Furukawa ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Masafumi Ototake ,  Minoru Ozaki

    发明人： Masaharu Ogawa ,  Yoshiki Nakajima ,  Osamu Ito ,  Teruo Furukawa ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Masafumi Ototake ,  Minoru Ozaki

    IPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/085 ,  G11B11/105 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B27/30

    CPC分类号： G11B20/10222 ,  G11B11/10565 ,  G11B20/10009 ,  G11B20/1217 ,  G11B20/1403 ,  G11B27/3027 ,  G11B7/005 ,  G11B7/00745 ,  G11B7/08505 ,  G11B7/08541 ,  G11B2220/20

    摘要： The present invention relates to apparatus and method for decoding a signal reproduced from an optical disc. The optical disc has a signal format for recording data from an original signal in a data area at the optical disc. The optical disc also has recorded thereon a clock signal having the same phase as the recorded data. During reproduction of the recorded signal from the optical disc, this clock signal is utilized to generate a delayed version of the reproduced data signal. This delayed signal is used to decode the reproduced data signal obtained from the optical disc, thereby enabling a phase shift of the reproduced clock signal to there produced data signal to be eliminated by circuit processing. During the recording on the data area of the optical disc, fixing data for setting phases of data reproducing recording clock and reproducing signal to optimum phases for decoding is recorded. A phase corrector is provided at the optical disc driving apparatus so as to delay the fixing data signal reproduced from the optical disc, whereby a phase shift between the reproduced data signal and the reproduced clock signal can be corrected to an optimum quantity and the data signal at a preformatted area of the optical disc can be reproduced without delay.

    摘要翻译： 本发明涉及对从光盘再现的信号进行解码的装置和方法。 光盘具有用于在光盘的数据区中记录来自原始信号的数据的信号格式。 光盘上也记录了与记录数据相同相位的时钟信号。 在从光盘再现记录的信号期间，该时钟信号用于产生再现数据信号的延迟版本。 该延迟信号用于对从光盘获得的再现数据信号进行解码，从而能够通过电路处理来消除再现的时钟信号到那里产生的数据信号。 在光盘的数据区域的记录期间，记录用于将数据再现记录时钟和再现信号的相位设置到用于解码的最佳相位的固定数据。 在光盘驱动装置上设置相位校正器，以延迟从光盘再现的固定数据信号，从而可以将再现的数据信号和再生的时钟信号之间的相移校正到最佳量，并且数据信号 可以无延迟地再现光盘的预格式化区域。

    Techniques for controlling beam position and focus in optical disk drives
    6.
    发明授权
    Techniques for controlling beam position and focus in optical disk drives 失效
    控制光盘位置和聚焦光盘驱动器的技术

    公开(公告)号：US5251194A

    公开(公告)日：1993-10-05

    申请号：US513079

    申请日：1990-04-12

    申请人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kimiyuki Koyanagi ,  Yoshiki Nakajima ,  Shuitsu Takeda ,  Kyoji Shimoda

    发明人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kimiyuki Koyanagi ,  Yoshiki Nakajima ,  Shuitsu Takeda ,  Kyoji Shimoda

    IPC分类号： G11B7/09 ,  G11B7/095

    CPC分类号： G11B7/0945 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0946

    摘要： An optical disk drive for recording and reproducing information on an optical disk medium includes a servo circuit for controlling tracking of a light beam on a predetermined track and a servo circuit for controlling focus of the light beam on the disk surface. The disk surface is divided into a plurality of regions, and calibration values for adjusting the servo circuits are determined in each region. The calibration values are stored in a memory and are used to adjust the servo circuits during tracking on a predetermined track. The calibration values include tracking offset values, focus offset values, servo deviation threshold values and sensor gain values. A number of techniques are disclosed for automatically determining the calibration values.

    摘要翻译： 用于在光盘介质上记录和再现信息的光盘驱动器包括用于控制预定轨道上的光束的跟踪的伺服电路和用于控制光盘在盘表面上的聚焦的伺服电路。 磁盘表面被分成多个区域，并且在每个区域中确定用于调整伺服电路的校准值。 校准值存储在存储器中，并且用于在预定轨道上的跟踪期间调整伺服电路。 校准值包括跟踪偏移值，对焦偏移值，伺服偏差阈值和传感器增益值。 公开了用于自动确定校准值的许多技术。