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31.发明授权Disk storage which automatically adjusts to optimum recording/reproducing level 失效磁盘存储自动调整到最佳的录音/再现级别
公开(公告)号：US5247509A
公开(公告)日：1993-09-21
申请号：US767078
申请日：1991-09-27
申请人： Kazuhiko Nakane , Kyosuke Yoshimoto , Yoshihiro Kiyose , Teruo Furukawa , Akira Mashimo , Hiroyuki Onda , Hidehiko Murata , Takuya Nagata
发明人： Kazuhiko Nakane , Kyosuke Yoshimoto , Yoshihiro Kiyose , Teruo Furukawa , Akira Mashimo , Hiroyuki Onda , Hidehiko Murata , Takuya Nagata
IPC分类号： G11B20/04 , G11B7/00 , G11B7/0045 , G11B7/005 , G11B7/0055 , G11B7/125 , G11B11/105
CPC分类号： G11B7/126 , G11B11/10504 , G11B11/10515 , G11B11/10597 , G11B7/0045 , G11B7/005
摘要： An optical or magneto-optical disk storage which automatically adjusts a recording/reproducing level of a number of kinds of optical or magneto-optical disks having different recording/reproducing levels to an optimum recording/reproducing level. The optical or magneto-optical disk storage has an attenuator which applies a predetermined attenuation amount to a reproduced signal reproduced from an optical or magneto-optical disk so as to attenuate the reproduced signal, or intensity adjusting means for adjusting the intensity of a laser beam used for recording and/or reproducing. The optical or magneto-optical disk storage detects an amplitude of the reproduced signal and feed-back-controls the attenuation amount or intensity of the laser beam in accordance with the detected amplitude.
摘要翻译： 一种光学或磁光盘存储器，其将具有不同记录/再现级别的多种光学或磁光盘的记录/再现级别自动调整到最佳记录/再现级别。 光学或磁光盘存储器具有衰减器，其对从光学或磁光盘再现的再现信号施加预定的衰减量，以衰减再现信号，或者用于调节激光束强度的强度调节装置 用于记录和/或再现。 光学或磁光盘存储器检测再现信号的幅度，并且根据检测到的幅度反馈控制激光束的衰减量或强度。
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32.发明授权Method and apparatus for producing an accurate error signal in an optical recording medium driver 失效用于在光记录介质驱动器中产生精确误差信号的方法和装置
公开(公告)号：US5007038A
公开(公告)日：1991-04-09
申请号：US226722
申请日：1988-08-01
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/09 , G11B19/04
CPC分类号： G11B7/0941 , G11B19/04
摘要： When recording, reproducing or erasing data signal by illuminating a recording medium surface with a condensed light spot, a tracking sensor signal or a focusing sensor signal is detected from light reflected from the recording medium surface. The detected signal is subjected to current-to-voltage conversion, and the current-to-voltage conversion gain is switched by estimating reflected light power from the recording medium surface.
摘要翻译： 当通过用聚光点照射记录介质表面来记录，再现或擦除数据信号时，从记录介质表面反射的光中检测跟踪传感器信号或聚焦传感器信号。 对所检测的信号进行电流 - 电压转换，并且通过估计来自记录介质表面的反射光功率来切换电流 - 电压转换增益。
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33.发明授权Optical disc with servo pattern providing enhanced reliability of servo clock detection and apparatus for accessing the optical disc 失效带伺服模式的光盘提供伺服时钟检测的增强可靠性和用于访问光盘的设备
公开(公告)号：US5117412A
公开(公告)日：1992-05-26
申请号：US526285
申请日：1990-05-21
申请人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
发明人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
CPC分类号： G11B19/20 , G11B19/04 , G11B27/3027 , G11B7/00745 , G11B7/08529 , G11B7/0857 , G11B7/24085
摘要： An optical disc having a plurality of information tracks. Each information track having a data field including multiple data bytes and a servo field including a first servo byte having a pair of wobbled pits and a second servo byte having a clock pit. The byte length of at least one of the first or second servo bytes being longer than the byte lengths of the data bytes. The increased byte length providing for greater distance between the wobbled pits and the clock pit resulting in increased reliability in clock pit detection. An accessing apparatus for accessing such an optical disc including a phase-locked loop circuit with a frequency dividing ratio that varies in accordance with the various byte lengths.
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34.发明授权
公开(公告)号：US5063546A
公开(公告)日：1991-11-05
申请号：US166671
申请日：1988-03-11
申请人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
发明人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
CPC分类号： G11B19/20 , G11B19/04 , G11B27/3027 , G11B7/00745 , G11B7/08529 , G11B7/0857 , G11B7/24085
摘要： An optical disc having a plurality of information tracks, each information track having a servo field including a pair of wobbled pits and the clock pit. The distance between one of the wobbled pits and the clock pit in each servo field is selected so that the optical disc includes at least three different types of servo field. These different types of servo field appear in a predetermined sequence for every one or more contiguous information tracks. A transducing apparatus for tranducing such an optical disc has a direction detecting circuit for detecting the moving velocity of a movable portion of an optical head, and a speed detecting circuit for detecting the relative velocity of the movable portion.
摘要翻译： 具有多个信息轨道的光盘，每个信息轨迹具有包括一对摆动凹坑和时钟凹坑的伺服场。 选择每个伺服磁场中的摆动凹坑之一和时钟凹坑之间的距离，使得光盘包括至少三种不同类型的伺服磁场。 对于每一个或多个连续的信息轨迹，这些不同类型的伺服字段以预定的顺序出现。 用于变换这种光盘的转换装置具有用于检测光学头的可移动部分的移动速度的方向检测电路和用于检测可动部分的相对速度的速度检测电路。
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35.发明授权Optical disk storage having reduced power consumption during seeking operations 失效光盘存储在寻求操作期间具有降低的功耗
公开(公告)号：US5265077A
公开(公告)日：1993-11-23
申请号：US728631
申请日：1991-07-11
CPC分类号： G11B7/08505
摘要： In an optical disk storage, the seek of an optical head is controlled so that the number of seek times cannot exceed a threshold number of times in a predetermined period or an accumulated seek period cannot exceed a threshold period in a predetermined period. Therefore, a wasteful power consumption and a rise in the internal temperature associated with the seek activity can be effectively prevented.
摘要翻译： 在光盘存储器中，控制光头的寻道使得寻找时间的数量不能超过预定时间段的阈值次数，或者累积寻道周期在预定时间段内不能超过阈值周期。 因此，可以有效地防止与寻找活动相关的浪费的功率消耗和内部温度的上升。
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36.发明授权
公开(公告)号：US5128916A
公开(公告)日：1992-07-07
申请号：US526584
申请日：1990-05-21
申请人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
发明人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
CPC分类号： G11B19/20 , G11B19/04 , G11B27/3027 , G11B7/00745 , G11B7/08529 , G11B7/0857 , G11B7/24085
摘要： An optical disc having a plurality of information tracks, each information track having a servo field including a pair of wobbled pits and a clock pit. The distance between one of the wobbled pits and the clock pit in each servo field is selected such that the optical disc includes at least three different types of servo field. These differnt types of servo field appear in a predetermined sequence for every one or more contiguous information tracks. A driving apparatus for driving such an optical disc has a direction detecting circuit for detecting the moving velocity of a movable portion of an optical head, and a speed detecting circuit for detecting the relative velocity of the movable portion.
摘要翻译： 具有多个信息轨道的光盘，每个信息轨道具有包括一对摆动凹坑和时钟凹坑的伺服场。 选择每个伺服字段中的摆动凹坑之一和时钟凹坑之间的距离，使得光盘包括至少三种不同类型的伺服字段。 对于每一个或多个连续的信息轨道，这些不同类型的伺服字段以预定的顺序出现。 用于驱动这种光盘的驱动装置具有用于检测光学头的可移动部分的移动速度的方向检测电路和用于检测可动部分的相对速度的速度检测电路。
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公开(公告)号：US5003525A
公开(公告)日：1991-03-26
申请号：US209552
申请日：1988-06-21
CPC分类号： G11B7/005 , G11B11/10536 , G11B11/10597 , G11B13/04 , G11B27/24 , G11B7/13
摘要： A recording medium drive apparatus has a first detector for detecting tracking information and a second detector for detecting focusing information when magnetization information and pit information recorded on an optical disc are reproduced and detected. This apparatus also comprises a preamplifier having the function of selecting by a control signal either a mode for adding and amplifying output signals of the first and second detectors by utilizing a predetermined gain or a mode for subtracting and amplifying those output signals by utilizing another predetermined gain, of unconditionally selecting the polarities of the added and subtracted amplification signals by means of the control signal, and of selectively outputting signals V.sub.i (i=1, 2, 3, 4).
摘要翻译： 记录介质驱动装置具有用于检测跟踪信息的第一检测器和用于在再现和检测记录在光盘上的磁化信息和凹坑信息时检测聚焦信息的第二检测器。 该装置还包括具有通过控制信号选择用于通过利用预定增益来添加和放大第一和第二检测器的输出信号的模式的功能的前置放大器，或者通过利用另外的预定增益来减法和放大那些输出信号的模式 ，通过控制信号无条件地选择加法和减法的放大信号的极性，并选择性地输出信号Vi（i = 1,2,3,4）。
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公开(公告)号：US5442608A
公开(公告)日：1995-08-15
申请号：US206900
申请日：1994-03-04
申请人： Yoshiaki Umeda , Teruo Furukawa , Masaharu Ogawa , Kazuhiko Nakane , Akira Mashimo , Tetsuro Araki , Hiroyuki Onda , Yoshiaki Sakai , Hiroshi Tsuyuguchi , Katsuya Enami
发明人： Yoshiaki Umeda , Teruo Furukawa , Masaharu Ogawa , Kazuhiko Nakane , Akira Mashimo , Tetsuro Araki , Hiroyuki Onda , Yoshiaki Sakai , Hiroshi Tsuyuguchi , Katsuya Enami
IPC分类号： G11B19/00 , G11B7/0037 , G11B11/105 , G11B19/16 , G11B7/00
CPC分类号： G11B19/00 , G11B11/10595 , G11B7/0037
摘要： A disk apparatus comprising a controller receiving commands from a command input device and controlling an entire operation of the disk apparatus. The rotating control function is coupled to the controller for controlling the first motor. The pickupmotor control function is coupled to the controller for controlling the second motor. The pickup control function is coupled to the controller for controlling a focusing operation and a tracking operation of the pickup. And the signal processing function is coupled to the controller for processing a recording signal to be recorded on the disk-shaped recording medium and a reproduced signal read out therefrom. The controller is comprised function-stop function for determining whether or not any command is received from the command input device during a predetermined period of time in a state. The disk apparatus is maintained in a predetermined mode and for stopping predetermined function among the rotating control function, the pickup motor control function, the pickup control function, and the signal processing function when it is determined that no command is received from the command input device during the predetermined period.
摘要翻译： 一种盘装置，包括控制器，从命令输入装置接收命令并控制盘装置的整个操作。 旋转控制功能耦合到控制器以控制第一电动机。 拾取电机控制功能耦合到控制器以控制第二电动机。 拾取控制功能耦合到控制器，用于控制拾取器的聚焦操作和跟踪操作。 并且信号处理功能被耦合到控制器，用于处理要记录在盘形记录介质上的记录信号和从其读出的再现信号。 控制器包括功能停止功能，用于在一个状态下的预定时间段内确定是否从命令输入设备接收到任何命令。 当确定没有从命令输入装置接收到命令时，盘装置被保持在预定模式并用于在旋转控制功能，拾取马达控制功能，拾取控制功能和信号处理功能之间停止预定功能 在预定期间。
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公开(公告)号：US4672362A
公开(公告)日：1987-06-09
申请号：US851081
申请日：1986-04-14
申请人： Teruo Furukawa , Minoru Ozaki
发明人： Teruo Furukawa , Minoru Ozaki
CPC分类号： H03M5/145
摘要： A binary data encoding process comprises the steps of separating a given binary data sequence at every two bits by a serial/parallel shift register (18), and converting the separated 2-bit data into a 3-bit code by using a logic circuit (19) and a parallel/serial shift register (20). A conversion pattern in the logic circuit (19) is exclusively determined based on the 2-bit data to be converted, 1-bit data immediately before and 2-bit data immediately after said 2-bit data, and a 3-bit code converted immediately before the conversion of said 2-bit data, wherein a succession of at least one but no more than seven "0" exists between an arbitrary "1" and the succeeding "1" in the converted 3-bit code sequence.
摘要翻译： 二进制数据编码处理包括以下步骤：通过串行/并行移位寄存器（18）将每两位给定的二进制数据序列分离，并通过使用逻辑电路（2）将分离的2位数据转换为3位代码 19）和并行/串行移位寄存器（20）。 逻辑电路（19）中的转换模式仅基于要转换的2位数据，紧接在之前的1位数据和紧接在2位数据之后的2位数据和3位代码转换 在所述2位数据的转换之前，其中在转换的3位代码序列中的任意“1”和后一“1”之间存在至少一个但不超过七个“0”的连续。
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公开(公告)号：US4562491A
公开(公告)日：1985-12-31
申请号：US475407
申请日：1983-03-15
CPC分类号： G11B20/1423 , G11B20/10 , G11B5/09
摘要： A multichannel digital magnetic recording apparatus comprises a plurality (N) of modulating circuits (41 to 4N) and timing circuits (51 to 5N). Digital signals (Z1 to ZN) undergo modulation in the modulating circuits in accordance with a modulation system of a detection window Tw. The modulated signals (A1 to AN) are converted into pulse current trains by the timing circuits and then delayed such that the respective pulse currents do not occur simultaneously. Accordingly, a power capacity required of a voltage source for writing the signals by means of thin film magnetic heads (71 to 7N) is considerably decreased.
摘要翻译： 多通道数字磁记录装置包括多个（N）个调制电路（41〜4N）和定时电路（51〜5N）。 数字信号（Z1至ZN）根据检测窗口Tw的调制系统在调制电路中进行调制。 调制信号（A1至AN）由定时电路转换成脉冲电流列，然后被延迟使得各个脉冲电流不同时发生。 因此，通过薄膜磁头（71〜7N）写入信号的电压源所需的功率容量大大降低。
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