公开(公告)号：US06765860B2

公开(公告)日：2004-07-20

申请号：US10000719

申请日：2001-10-31

申请人： Minoru Tobita ,  Shigemi Maeda ,  Toshiaki Hioki ,  Michio Matsuura

发明人： Minoru Tobita ,  Shigemi Maeda ,  Toshiaki Hioki ,  Michio Matsuura

IPC分类号： G11B724

CPC分类号： G11B7/00745 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/0938 ,  G11B7/0956 ,  G11B11/10515 ,  G11B11/10582 ,  G11B27/19 ,  G11B27/3027 ,  G11B2220/20

摘要： An optical disc and an optical disc drive for the optical disc are provided which are suitable for recording data with a high density. The optical disc D uses both lands and grooves as recording tracks. Each of the tracks consists of one address segment and forty five data segments. The address segment is wobbled at one side thereof. Each of the data segments is a DC groove. The address segment records an address information including a sync signal, frame address, track address and CRC, a tilt pattern and a clock mark. The clock mark is adapted to reflect laser beam in one amount before the mark and in another amount after the mark. The tilt pattern has a different track pitch from those in other areas. The data segments record data magneto-optically.

摘要翻译： 提供一种用于光盘的光盘和光盘驱动器，其适合于以高密度记录数据。 光盘D使用焊盘和凹槽作为记录轨道。 每个轨道由一个地址段和四十五个数据段组成。 地址段在其一侧摆动。 每个数据段都是一个直流槽。 地址段记录包括同步信号，帧地址，轨道地址和CRC的地址信息，倾斜图案和时钟标记。 时钟标记适于在标记之前反射一个量的激光束，并在标记之后反射另一个量。 倾斜图案具有与其他区域不同的轨道间距。 数据段磁光记录数据。

公开(公告)号：US06674701B2

公开(公告)日：2004-01-06

申请号：US10033319

申请日：2001-12-27

申请人： Tetsuya Okumura ,  Shigemi Maeda

发明人： Tetsuya Okumura ,  Shigemi Maeda

IPC分类号： G11B700

CPC分类号： G11B7/126 ,  G11B7/00 ,  G11B7/005 ,  G11B7/00745 ,  G11B7/08505

摘要： By adding a predetermined offset value which is not less than 0 to, to the value of a readout power at a time when readout power control operations are temporarily suspended, i.e., at a time when an optical head initiates a seek operation, with an adder, this latter value being stored in a readout power value storage circuit, because an optical recording medium readout apparatus makes it possible to cause the value of the readout power at the time when readout power control operations resume, i.e., at the time of completion of the seek operation performed by the optical head, to avoid abnormal power domains in which change in amplitude ratio with respect to change in readout power is not monotonically decreasing, it is made possible to avoid abnormal conditions such as occurrence of lag in response during readout power control operations.

摘要翻译： 通过在暂时停止读出功率控制操作时，即在光头启动寻道操作的时刻，向加法器添加不小于0的预定偏移值，并将其与读出功率的值相加， ，后一个值被存储在读出功率值存储电路中，因为光学记录介质读出装置使得可以使读出功率控制操作恢复时的读出功率的值即在完成时 通过光头执行的寻道操作，为了避免相对于读出功率变化的振幅比变化的异常功率域不是单调减少，可以避免在读出功率期间发生响应滞后等异常情况 控制操作。

公开(公告)号：US06392970B1

公开(公告)日：2002-05-21

申请号：US09129191

申请日：1998-07-23

申请人： Hiroshi Fuji ,  Shigemi Maeda ,  Tomoyuki Miyake ,  Yasuo Nakata ,  Nobuo Ogata ,  Jun Akiyama ,  Toshiharu Inui ,  Yoshihiro Sekimoto ,  Hideaki Sato

发明人： Hiroshi Fuji ,  Shigemi Maeda ,  Tomoyuki Miyake ,  Yasuo Nakata ,  Nobuo Ogata ,  Jun Akiyama ,  Toshiharu Inui ,  Yoshihiro Sekimoto ,  Hideaki Sato

IPC分类号： G11B509

CPC分类号： G11B7/126 ,  G11B7/005 ,  G11B7/00745 ,  G11B11/10515 ,  G11B11/10584 ,  G11B11/10595

摘要： A reproducing light quantity control method for an optical memory device includes the steps of (1) recording test data on an optical recording medium; (2) reproducing the test data recorded on the optical recording medium by changing a reproducing light quantity in a plurality of light quantity values; (3) measuring a quality value and a signal quantity of each of a plurality of reproducing signals from the test data; (4) selecting an optimum reproducing signal quantity from a plurality of reproducing signal quantities in accordance with quality values of the plurality of reproducing signals so as to decide a target value of reproducing signal quantity; and (5) recording the target value on a target value recording region of the optical recording medium. This method reduces the time required to obtain a target value of a reproducing signal quantity and speeds up an operation from installing of the optical recording medium to finishing of preparation for recording and reproducing.

摘要翻译： 一种用于光学存储器件的再现光量控制方法包括以下步骤：（1）将测试数据记录在光学记录介质上; （2）通过改变多个光量值中的再现光量来再现记录在光记录介质上的测试数据; （3）从测试数据测量多个再现信号中的每一个的质量值和信号量; （4）根据多个再现信号的质量值从多个再现信号量中选择最佳再现信号量，以便确定再现信号量的目标值; 和（5）将目标值记录在光学记录介质的目标值记录区上。 该方法减少了获得再现信号量的目标值所需的时间，并且加快了从安装光学记录介质到完成记录和再现准备的操作。

公开(公告)号：US06169714A

公开(公告)日：2001-01-02

申请号：US09173069

申请日：1998-10-16

申请人： Yasuhito Tanaka ,  Masaaki Kurebayashi ,  Takeshi Maeda ,  Hitoshi Watanabe ,  Tetsu Watanabe ,  Shigemi Maeda ,  Satoshi Sumi ,  Nobuhide Matsubayashi ,  Michio Matsuura

发明人： Yasuhito Tanaka ,  Masaaki Kurebayashi ,  Takeshi Maeda ,  Hitoshi Watanabe ,  Tetsu Watanabe ,  Shigemi Maeda ,  Satoshi Sumi ,  Nobuhide Matsubayashi ,  Michio Matsuura

IPC分类号： G11B709

CPC分类号： G11B7/126 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0945 ,  G11B7/0956 ,  G11B11/10515 ,  G11B11/10576 ,  G11B11/10595

摘要： A magneto-optical information recording/reproducing apparatus in which a magneto-optical information recording medium at least including a first magnetic film having perpendicular magnetic anisotropy, and a second magnetic film to which information recorded on the first magnetic film is transferred by irradiation of a laser beam, is used so that a readout laser beam is irradiated onto the second magnetic film to thereby readout the information transferred to the second magnetic film. The apparatus includes a 2-split detection circuit for receiving the readout laser beam reflected from the second magnetic film of the recording medium, and a subtraction circuit in which output signals of the two detection elements of the 2-split detection circuit are subtracted from each other to generate a differential signal. The apparatus further comprises a circuit for making a spot of the laser beam jump one track before readout of the information from the magneto-optical information recording medium, a positive/negative balance correction circuit for detecting an amplitude ratio between positive and negative side amplitudes in a track jump signal generated in the differential signal from the subtraction circuit in response to the track jump to thereby output a correction signal in accordance with the amplitude ratio, and an addition circuit for adding the correction signal to the differential signal to thereby generate a tracking error signal for tracking control used in readout of the magneto-optical information from the magneto-optical information recording medium.

摘要翻译： 一种磁光信息记录/再现装置，其中至少包括具有垂直磁各向异性的第一磁性膜的磁光信息记录介质和第二磁性膜，通过照射 使用激光束，使得读出的激光束照射到第二磁性膜上，从而读出传递到第二磁性膜的信息。 该装置包括用于接收从记录介质的第二磁性膜反射的读出激光束的二分割检测电路，以及减法电路，其中从每个减去2分割检测电路的两个检测元件的输出信号 另外产生差分信号。 该装置还包括一个电路，用于在从磁光信息记录介质读出信息之前使激光束的点跳跃到一个轨道;正/负平衡校正电路，用于检测正，负振幅之间的振幅比， 响应于轨道跳跃从减法电路产生的差分信号中产生的轨道跳转信号，从而根据振幅比输出校正信号;以及加法电路，用于将校正信号加到差分信号上，从而产生跟踪 用于从磁光信息记录介质读出磁光信息的跟踪控制的误差信号。

公开(公告)号：US5153861A

公开(公告)日：1992-10-06

申请号：US450254

申请日：1989-12-13

申请人： Shigemi Maeda ,  Shigeo Terashima

发明人： Shigemi Maeda ,  Shigeo Terashima

IPC分类号： G11B11/10 ,  G11B7/0055 ,  G11B11/105 ,  G11B19/24 ,  G11B27/00 ,  G11B27/034 ,  G11B27/036 ,  G11B27/10 ,  G11B27/11 ,  G11B27/22 ,  G11B27/30 ,  G11B27/32 ,  G11B27/34 ,  G11B27/36

CPC分类号： G11B27/329 ,  G11B11/10502 ,  G11B11/10563 ,  G11B11/10595 ,  G11B19/24 ,  G11B27/007 ,  G11B27/036 ,  G11B27/105 ,  G11B27/11 ,  G11B27/22 ,  G11B27/3027 ,  G11B27/34 ,  G11B7/00557 ,  G11B2220/216 ,  G11B2220/2525 ,  G11B2220/2545 ,  G11B2220/65 ,  G11B2220/913 ,  G11B27/034 ,  G11B27/36

摘要： In a recording/reproducing device in accordance with the present invention, recording or reproducing positions are recognized by using absolute address parts which are predeterminately formed in a rewritable recording medium. Moreover, the device is composed so that the user can easily edit reproducing procedures stored in memory means with respect to each information in the recording medium by using the recording or reproducing positions read from above-mentioned absolute address parts and he/she can also rewrite above-mentioned reproducing procedures edited by him/her in the lead-in region of the above-mentioned recording medium. Accordingly, the user can save trouble to re-enter those reproducing procedures every time he/she places the recording medium in the recording/reproducing device, and once the recording medium having the edited reproducing procedure information recorded in the lead-in area is placed in the recording/reproducing device, successive reproductions of each information according to desired reproducing procedures are easily performed, thereby resulting in an improved operability.