公开(公告)号：US20050276178A1

公开(公告)日：2005-12-15

申请号：US10988837

申请日：2004-11-16

申请人： Koichiro Nishimura ,  Kazuhiro Ikeda ,  Toshimitsu Kaku

发明人： Koichiro Nishimura ,  Kazuhiro Ikeda ,  Toshimitsu Kaku

IPC分类号： G11B7/0045 ,  G11B7/00 ,  G11B7/005 ,  G11B7/09 ,  G11B7/125

CPC分类号： G11B7/09 ,  G11B7/0053 ,  G11B7/1267

摘要： In the sample-and-hold circuit for laser power detection signal and servo signal, the sample-and-hold operation timing is controlled to set by monitoring the output from the sample-and-hold circuit. In the invention of this application, the sample-and-hold timing is changed to be larger or smaller than the estimated timing, and reference is made to the result of the monitoring, thus determining the optimum timing. The sample-and-hold timing is controlled to fix to this optimum value.

摘要翻译： 在用于激光功率检测信号和伺服信号的采样保持电路中，通过监视采样保持电路的输出来控制采样保持操作定时。 在本申请的发明中，采样保持定时被改变为大于或小于估计定时，并且参考监视结果，从而确定最佳定时。 控制采样和保持定时以固定到该最佳值。

公开(公告)号：US07227822B2

公开(公告)日：2007-06-05

申请号：US10782330

申请日：2004-02-18

申请人： Koichiro Nishimura ,  Manabu Katsuki ,  Toshimitsu Kaku

发明人： Koichiro Nishimura ,  Manabu Katsuki ,  Toshimitsu Kaku

IPC分类号： G11B7/00

CPC分类号： G11B7/126 ,  G11B7/00456 ,  G11B7/00458 ,  G11B20/1403 ,  H01S5/042 ,  H01S5/0683

摘要： A laser driver drives a laser diode by producing a write strategy, that is, a recording waveform from a recording clock and a modulated signal. In one embodiment, a laser driver produces the waveform of a driving signal, which is used to drive a laser diode, using a record data signal that represents record data to be recorded on a recording medium. The laser driver comprises an internal clock production circuit that produces an internal clock synchronous with the record data signal, and a strobe circuit that strobes the record data signal according to the internal clock.

摘要翻译： 激光驱动器通过产生写入策略来驱动激光二极管，即来自记录时钟和调制信号的记录波形。 在一个实施例中，激光驱动器使用表示要记录在记录介质上的记录数据的记录数据信号产生用于驱动激光二极管的驱动信号的波形。 激光驱动器包括产生与记录数据信号同步的内部时钟的内部时钟产生电路，以及根据内部时钟选通记录数据信号的选通电路。

公开(公告)号：US20080253238A1

公开(公告)日：2008-10-16

申请号：US11947974

申请日：2007-11-30

申请人： Toshimitsu Kaku ,  Kazuhide Hamada

发明人： Toshimitsu Kaku ,  Kazuhide Hamada

IPC分类号： G11B7/00

CPC分类号： G11B7/0953 ,  G11B7/0941 ,  G11B7/126

摘要： Due to the axial runout of an optical disc, a frequency of a high-frequency current to be superimposed onto a DC current could not be maintained. In order to solve the problem described above, a drive signal is generated by superimposing a high-frequency signal onto a DC current, the drive signal is applied to a laser beam light source, thereby the light source is driven; and a servo signal at a signal level corresponding to a defocus amount of the laser beam relative to the surface of the optical disc is generated based on a reflected light of the laser beam from the recording surface of the optical disc, and a low-frequency component of the servo signal is extracted, and thereby the frequency of the high-frequency signal to be superimposed onto the DC current in the light source driver is controlled based on the low-frequency component of the servo signal.

摘要翻译： 由于光盘的轴向跳动，不能保持叠加在直流电流上的高频电流的频率。 为了解决上述问题，通过将高频信号叠加在直流电流上来产生驱动信号，驱动信号被施加到激光束光源，从而驱动光源; 并且基于来自光盘的记录表面的激光束的反射光产生与激光束相对于光盘表面的散焦量对应的信号电平的伺服信号，并且低频 提取伺服信号的分量，从而基于伺服信号的低频分量来控制要叠加在光源驱动器中的DC电流上的高频信号的频率。

公开(公告)号：US20050030989A1

公开(公告)日：2005-02-10

申请号：US10937908

申请日：2004-09-09

申请人： Makoto Nihei ,  Toshimitsu Kaku ,  Akihiro Asada ,  Takashi Hoshino

发明人： Makoto Nihei ,  Toshimitsu Kaku ,  Akihiro Asada ,  Takashi Hoshino

IPC分类号： G11B7/125 ,  H01S5/062 ,  H01S5/0687 ,  H01S3/00 ,  H01S3/10

CPC分类号： G11B7/1263 ,  H01S5/0687

摘要： An optical disk apparatus uses a laser driver which can measure the frequency of the high-frequency superimposed current of the semiconductor laser simply and accurately. The apparatus includes a semiconductor laser which emits a laser beam onto the optical disk, a laser driver which drives the semiconductor laser with a current, with the high-frequency current being superimposed thereon, and measures the frequency of the high-frequency current, and a main controller which controls the frequency of the high-frequency current produced by the laser driver by using the frequency measured by the laser driver.

摘要翻译： 光盘装置使用能够简单且准确地测量半导体激光器的高频叠加电流的频率的激光驱动器。 该装置包括：将激光束发射到光盘上的半导体激光器，以高频电流叠加在一起驱动半导体激光器的激光驱动器，并测量高频电流的频率;以及 主控制器，其通过使用由激光驱动器测量的频率来控制由激光驱动器产生的高频电流的频率。

公开(公告)号：US06493297B1

公开(公告)日：2002-12-10

申请号：US08056812

申请日：1993-05-04

申请人： Soichi Isono ,  Satoshi Kawamura ,  Kiyoshi Honda ,  Toshimitsu Kaku ,  Hitoshi Komatsu ,  Yuji Yamane ,  Yasushi Fukuda ,  Toshio Niihara ,  Hiroshi Ide

发明人： Soichi Isono ,  Satoshi Kawamura ,  Kiyoshi Honda ,  Toshimitsu Kaku ,  Hitoshi Komatsu ,  Yuji Yamane ,  Yasushi Fukuda ,  Toshio Niihara ,  Hiroshi Ide

IPC分类号： G11B7095

CPC分类号： G11B7/08505 ,  G11B7/14

摘要： Multibeam optical disk record and reproduction apparatus and method, in which at least two light beams generated are concentrated in different positions of on recording tracks of a recording medium to record or reproduce data to or from the recording medium on the different positions at the same time. The light beams are moved independently of each other across the recording tracks so that any one light beam is movable during the recording or reproducing of data by another light beam. This allows parallel recording/reproducing with a plurality of light beams without producing areas unaccessed due to the jumps of the light beams.

摘要翻译： 多光束光盘记录和再现装置和方法，其中产生的至少两个光束集中在记录介质的记录轨道上的不同位置，以在同一时间在不同位置记录或从记录介质再现数据 。 光束在记录轨道之间彼此独立地移动，使得任何一个光束在由另一个光束记录或再现数据期间是可移动的。 这允许使用多个光束的并行记录/再现，而不会由于光束的跳跃而产生不能被占用的区域。

公开(公告)号：US6088307A

公开(公告)日：2000-07-11

申请号：US40405

申请日：1998-03-18

申请人： Tetsuya Fushimi ,  Toshimitsu Kaku ,  Tetsuya Ikeda ,  Toshiaki Ishibashi ,  Kazuo Shigematsu

发明人： Tetsuya Fushimi ,  Toshimitsu Kaku ,  Tetsuya Ikeda ,  Toshiaki Ishibashi ,  Kazuo Shigematsu

IPC分类号： G11B7/0037 ,  G11B7/007 ,  G11B7/013 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B27/19 ,  G11B27/30 ,  G11B7/00

CPC分类号： G11B27/3027 ,  G11B20/10 ,  G11B20/1403 ,  G11B27/19 ,  G11B7/00375 ,  G11B20/1217 ,  G11B20/1258 ,  G11B7/24082 ,  G11B7/24085

摘要： In a wobble signal detecting circuit provided by the present invention, a wobble signal is converted into binary data before being supplied to a PLL circuit by way of a polarity switching circuit and a clock switching circuit. The PLL circuit outputs a recording/playback timing generation clock signal. The frequency of the recording/playback timing generation clock signal is divided by a frequency dividing circuit before being fed back to the PLL circuit. A difference in phase between the wobble signal and the feedback signal is detected by a phase inversion detecting circuit and, if the difference in phase exceeds a phase difference determined in advance, the phase inversion detecting circuit generates a polarity switching signal for switching the polarity of the wobble signal. The polarity switching signal is used to invert the polarity of the polarity switching circuit.

摘要翻译： 在本发明提供的摆动信号检测电路中，通过极性切换电路和时钟切换电路将摆动信号转换成二进制数据，然后再提供给PLL电路。 PLL电路输出记录/重放定时产生时钟信号。 在反馈到PLL电路之前，记录/重放定时产生时钟信号的频率被分频电路分压。 摆动信号和反馈信号之间的相位差由相位反转检测电路检测，如果相位差超过预先确定的相位差，则相位反转检测电路产生极性切换信号，用于切换 摆动信号。 极性切换信号用于反转极性切换电路的极性。

公开(公告)号：US5339319A

公开(公告)日：1994-08-16

申请号：US724716

申请日：1991-07-02

申请人： Yuji Yamane ,  Toshimitsu Kaku ,  Yasushi Fukuda ,  Hitoshi Komatsu ,  Nobuhiro Matsumura ,  Shigenori Okamine ,  Kiyoshi Matsumoto ,  Soichi Isono ,  Kunihiko Kizaki

发明人： Yuji Yamane ,  Toshimitsu Kaku ,  Yasushi Fukuda ,  Hitoshi Komatsu ,  Nobuhiro Matsumura ,  Shigenori Okamine ,  Kiyoshi Matsumoto ,  Soichi Isono ,  Kunihiko Kizaki

IPC分类号： G11B20/10 ,  G06F11/20 ,  G11B7/004 ,  G11B19/02 ,  G11B20/12 ,  G11B20/18 ,  G06F11/00 ,  G11B7/13

CPC分类号： G11B20/1883 ,  G11B19/02 ,  G11B7/004 ,  G11B2220/20

摘要： In a rotary type storage apparatus and a control method thereof, a plurality of concentric or spiral information tracks are set and also each of the plural information tracks is subdivided into a plurality of sectors along a circumferential direction, which constitute a plurality of information recording planes. Also, in this apparatus and method, there are provided a plurality of read/write heads employed at each of the information recording planes and accessible to the information tracks, and also a head drive mechanism for positioning these plural read/write heads to the information tracks. At least one of the plural information recording planes corresponds to such a recording plane where a substitution information track has been set, on which a substitution sector corresponding to a failed sector present at another information recording plane is recorded.

摘要翻译： 在旋转式存储装置及其控制方法中，设置多个同心或螺旋信息轨迹，并且将多个信息轨道中的每一个沿周向细分为多个扇区，构成多个信息记录平面 。 此外，在该装置和方法中，提供了在信息记录平面中的每个信息记录平面上使用的多个读/写头，以及用于将这些多个读/写头定位到信息的头驱动机构 轨道 多个信息记录面中的至少一个对应于已经设置了替代信息轨道的记录面，在该记录面上记录了与另一信息记录面上存在的故障扇区对应的替代扇区。

公开(公告)号：US4866687A

公开(公告)日：1989-09-12

申请号：US240487

申请日：1988-09-06

申请人： Masuo Kasai ,  Takeshi Maeda ,  Kazuo Shigematsu ,  Toshimitsu Kaku ,  Masahiro Takasago

发明人： Masuo Kasai ,  Takeshi Maeda ,  Kazuo Shigematsu ,  Toshimitsu Kaku ,  Masahiro Takasago

IPC分类号： G11B7/085 ,  G11B7/095

CPC分类号： G11B7/08588 ,  G11B7/08517 ,  G11B7/08541 ,  G11B7/0953 ,  Y10S358/907

摘要： An optical disk storage access method using a fine and coarse actuators for positioning a light spot to an intended track on the disk, wherein a pulse is generated each time the light spot has traversed a track, the pulses are counted to determine the distance from the current spot position to a target track, the fine actuator is activated depending on the measured distance, and the fine and coarse actuators are operated in unison so that the light spot is positioned to the target track.

摘要翻译： 一种光盘存储访问方法，使用精细和粗略的致动器将光点定位到盘上的预期轨道，其中每当光点已经穿过轨道时产生脉冲，则脉冲被计数以确定距离 当前光点位置到目标轨道，精细致动器根据测量的距离被激活，并且精细和粗略的致动器被一致地操作，使得光点被定位到目标轨道。

公开(公告)号：US4622564A

公开(公告)日：1986-11-11

申请号：US681690

申请日：1984-12-14

申请人： Toshimitsu Kaku ,  Takeshi Nakao ,  Yoshito Tsunoda

发明人： Toshimitsu Kaku ,  Takeshi Nakao ,  Yoshito Tsunoda

IPC分类号： G11B7/0055 ,  G11B7/09 ,  G11B7/125 ,  G11B20/18 ,  G11B27/36 ,  G01D15/06 ,  G01D9/42

CPC分类号： G11B7/125 ,  G11B27/36 ,  G11B7/0055 ,  G11B7/0901 ,  G11B20/1879

摘要： In an optical information recording apparatus in which a plurality of light beams are focused on a disc to form a write/read spot or an erase spot, the position of the light spots on a track of the disc is detected to control the distance between the light spots or the length of the light spots, so that even when the positions at which the light spots are formed differ in the radial direction of the disc, uniform and accurate write/read/erase of information can be effected irrespective of the light spot positions.

摘要翻译： 在其中多个光束聚焦在盘上以形成写入/读取点或擦除点的光学信息记录装置中，检测光盘的轨道上的位置，以控制光盘之间的距离 光点或光斑的长度，使得即使形成光点的位置在盘的径向方向上不同，可以实现信息的均匀和准确的写入/读取/擦除，而不管光点如何 职位

公开(公告)号：US4532522A

公开(公告)日：1985-07-30

申请号：US408678

申请日：1982-08-16

申请人： Yoshito Tsunoda ,  Takeshi Maeda ,  Shigeru Nakamura ,  Toshimitsu Kaku

发明人： Yoshito Tsunoda ,  Takeshi Maeda ,  Shigeru Nakamura ,  Toshimitsu Kaku

IPC分类号： G02B27/42 ,  G11B7/00 ,  G11B7/004 ,  G11B7/08 ,  G11B7/09 ,  G11B7/095 ,  G11B7/125 ,  G11B21/10

CPC分类号： G11B7/09 ,  G11B7/0903 ,  G11B7/125

摘要： An optical recording apparatus wherein in front and rear of a first light spot for recording predetermined information along a guide groove provided in a recording medium beforehand, two second light spots and two third light spots are arranged along the guide groove and in a manner to mutually deviate from the center of the guide groove; the second light spots are arranged in an area with no information recorded therein, while the third light spots are arranged in an area with the information recorded therein; and the position of the first light spot is controlled on the basis of the difference between the quantities of light of the second light spots and the difference between the quantities of light of the third light spots, so as to track the information.

摘要翻译： 一种光学记录装置，其特征在于，在预先在设置于记录介质中的引导槽记录预定信息的第一光点的前方和后方，沿引导槽配置两个第二光点和两个第三光点， 偏离导槽的中心; 第二光点被布置在没有记录信息的区域中，而第三光点被布置在其中记录有信息的区域中; 并且基于第二光点的光量与第三光点的光量之差的差来控制第一光点的位置，以便跟踪信息。