公开(公告)号：US06345023B1

公开(公告)日：2002-02-05

申请号：US09291118

申请日：1999-04-14

申请人： Tetsuya Fushimi ,  Toshimitsu Kaku ,  Toshiaki Ishibashi ,  Atsushi Saito

发明人： Tetsuya Fushimi ,  Toshimitsu Kaku ,  Toshiaki Ishibashi ,  Atsushi Saito

IPC分类号： G11B700

CPC分类号： G11B19/247 ,  G11B7/007 ,  G11B7/00745 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027

摘要： An optical disc apparatus being able to read and write from and into an optical disc of a wobble groove type or method, a rotation control of a spindle motor is performed including a spindle controller portion and a PWM oscillator generating a clock for use of rotation control, wherein the frequency of the clock for use of rotation control is set to be different from that of a wobble signal or outside an area ±50% of wide capture fluctuation of the wobble signal, thereby providing the optical disc apparatus with which external disturbance on the wobble signal or the like can be reduced and a stabilization of the optical disc apparatus can be obtained.

摘要翻译： 一种能够从摆盘式或方法读取光盘的光盘装置，执行主轴电动机的旋转控制，该主轴电动机包括主轴控制器部分和产生用于旋转控制的时钟的PWM振荡器 其中，使用旋转控制的时钟的频率被设定为与摆动信号的频率不同，或者在摆动信号的宽捕获波动的±50％的范围外，从而为光盘装置提供外部干扰 可以减小摆动信号等，并且可以获得光盘装置的稳定性。

公开(公告)号：US06246661B1

公开(公告)日：2001-06-12

申请号：US09644748

申请日：2000-08-24

申请人： Tsuyoshi Toda ,  Shigeki Yamazaki ,  Toshimitsu Kaku

发明人： Tsuyoshi Toda ,  Shigeki Yamazaki ,  Toshimitsu Kaku

IPC分类号： G11B700

CPC分类号： G11B7/1267 ,  G11B7/0045 ,  G11B7/0062 ,  G11B11/10504 ,  G11B11/10521 ,  G11B11/10595

摘要： The device seeks to improve the reliability of information and to increase recording capacity by controlling the recording mark to be recorded on the recording medium with high preciseness. To improve the conformity of a recording medium with a device that records, retrieves and erases information, a recording pulse train is generated by a test write data generating circuit 18 and a recording pulse forming circuit 15 and a recording mark is recorded on a recording medium 5 by a laser driver 14. Excessive power recording is reduced, an optimum recording power is determined and regular information recording and retrieving is carried out by detecting a test write data from a test write data detecting circuit 12 to which the retrieved signal from the recording medium 5 is input. Based upon analysis of the retrieved signal by a controller 19, and the range of next power scan is changed so as to avoid excessive power recording while making it possible to determine the optimum recording power.

摘要翻译： 该设备旨在提高信息的可靠性并通过以高精度控制记录在记录介质上的记录标记来提高记录容量。 为了提高记录介质与记录，检索和擦除信息的设备的一致性，记录脉冲串由测试写入数据产生电路18和记录脉冲形成电路15产生，记录标记被记录在记录介质上 通过激光驱动器14来降低功率记录。通过检测来自记录的检索信号的测试写入数据检测电路12的测试写入数据，确定最佳记录功率并定期进行信息记录和检索 介质5被输入。 基于由控制器19对检索到的信号的分析，并且改变下一次功率扫描的范围，以避免过多的功率记录，同时使得可以确定最佳记录功率。

公开(公告)号：US06188654B1

公开(公告)日：2001-02-13

申请号：US09100810

申请日：1998-06-22

申请人： Toshimitsu Kaku ,  Toru Kawashima ,  Takehiko Sekine ,  Hisataka Sugiyama ,  Yosiho Suzuki ,  Tetsuya Fushimi

发明人： Toshimitsu Kaku ,  Toru Kawashima ,  Takehiko Sekine ,  Hisataka Sugiyama ,  Yosiho Suzuki ,  Tetsuya Fushimi

IPC分类号： G11B509

CPC分类号： G11B7/0948 ,  G11B7/08511 ,  G11B2007/0013

摘要： A beam is irradiated to an information recording medium having land tracks and groove tracks alternately formed on a track formed in turn on an information recording surface thereof and pre-pits so pre-formatted as to deviate from the center of the track, a return beam of the irradiated beam is received by detectors split into two parts in a track direction to obtain a differential signal, the pre-pit is detected from this differential signal and control of recording and reproducing processings is executed by using the pre-pit detection signal so obtained as the reference.

摘要翻译： 将光束照射到信息记录介质上，该信息记录介质具有交替地形成在其信息记录表面上形成的轨迹上的槽脊轨道和凹槽轨道，并且如预先格式化的预凹坑偏离轨道的中心，返回光束 照射光束的光束由轨道方向分成两部分的检测器接收，以获得差分信号，从该差分信号检测预凹坑，并通过使用预凹坑检测信号来执行记录和再现处理的控制 获得作为参考。

公开(公告)号：US6125093A

公开(公告)日：2000-09-26

申请号：US411639

申请日：1999-10-04

申请人： Tsuyoshi Toda ,  Shigeki Yamazaki ,  Toshimitsu Kaku

发明人： Tsuyoshi Toda ,  Shigeki Yamazaki ,  Toshimitsu Kaku

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/125 ,  G11B11/105

CPC分类号： G11B7/1267 ,  G11B11/10595 ,  G11B7/0045 ,  G11B7/0062 ,  G11B11/10504 ,  G11B11/10521

摘要： The device seeks to improve the reliability of information and to increase recording capacity by controlling the recording mark to be recorded on the recording medium with high preciseness. To improve the conformity of a recording medium with a device that records, retrieves and erases information, a recording pulse train is generated by a test write data generating circuit 18 and a recording pulse forming circuit 15 and a recording mark is recorded on a recording medium 5 by a laser driver 14. Excessive power recording is reduced, an optimum recording power is determined and regular information recording and retrieving is carried out by detecting a test write data from a test write data detecting circuit 12 to which the retrieved signal from the recording medium 5 is input. Based upon analysis of the retrieved signal by a controller 19, and the range of next power scan is changed so as to avoid excessive power recording while making it possible to determine the optimum recording power.

摘要翻译： 该设备旨在提高信息的可靠性并通过以高精度控制记录在记录介质上的记录标记来提高记录容量。 为了提高记录介质与记录，检索和擦除信息的设备的一致性，记录脉冲串由测试写入数据产生电路18和记录脉冲形成电路15产生，记录标记被记录在记录介质上 通过激光驱动器14来降低功率记录。通过检测来自记录的检索信号的测试写入数据检测电路12的测试写入数据，确定最佳记录功率并定期进行信息记录和检索 介质5被输入。 基于由控制器19对检索到的信号的分析，并且改变下一次功率扫描的范围，以避免过多的功率记录，同时使得可以确定最佳记录功率。

公开(公告)号：US5974021A

公开(公告)日：1999-10-26

申请号：US870405

申请日：1997-06-06

申请人： Tsuyoshi Toda ,  Shigeki Yamazaki ,  Toshimitsu Kaku

发明人： Tsuyoshi Toda ,  Shigeki Yamazaki ,  Toshimitsu Kaku

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/125 ,  G11B11/105

CPC分类号： G11B7/1267 ,  G11B11/10595 ,  G11B7/0045 ,  G11B7/0062 ,  G11B11/10504 ,  G11B11/10521

摘要： The device seeks to improve the reliability of information and to increase recording capacity by controlling the recording mark to be recorded on the recording medium with high preciseness. To improve the conformity of a recording medium with a device that records, retrieves and erases information, a recording pulse train is generated by a test write data generating circuit 18 and a recording pulse forming circuit 15 and a recording mark is recorded on a recording medium 5 by a laser driver 14. Excessive power recording is reduced, an optimum recording power is determined and regular information recording and retrieving is carried out by detecting a test write data from a test write data detecting circuit 12 to which the retrieved signal from the recording medium 5 is input. Based upon analysis of the retrieved signal by a controller 19, and the range of next power scan is changed so as to avoid excessive power recording while making it possible to determine the optimum recording power.

摘要翻译： 该设备旨在提高信息的可靠性并通过以高精度控制记录在记录介质上的记录标记来提高记录容量。 为了提高记录介质与记录，检索和擦除信息的设备的一致性，记录脉冲串由测试写入数据产生电路18和记录脉冲形成电路15产生，记录标记被记录在记录介质上 通过激光驱动器14来降低功率记录。通过检测来自记录的检索信号的测试写入数据检测电路12的测试写入数据，确定最佳记录功率并定期进行信息记录和检索 介质5被输入。 基于由控制器19对检索到的信号的分析，并且改变下一次功率扫描的范围，以避免过多的功率记录，同时使得可以确定最佳记录功率。

公开(公告)号：US5412632A

公开(公告)日：1995-05-02

申请号：US28224

申请日：1993-03-09

申请人： Seiichi Mita ,  Toru Kawashima ,  Toshimitsu Kaku

发明人： Seiichi Mita ,  Toru Kawashima ,  Toshimitsu Kaku

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B11/10 ,  G11B11/105 ,  G11B20/10

CPC分类号： G11B11/10597 ,  G11B20/10009

摘要： A signal reproducing system discriminates signals stably in the case of reproducing a signal from an optical recording medium which has coexistent recording areas with the signals recorded in different recording forms therein. Parts that constitute a reproduced signal are respectively derived by corresponding signal detectors from the optical recording medium in which a preformat area and a data area are included as the coexistent recording areas. The average potentials of VFO parts, which are respectively contained in the reproduced signal parts, are detected on the basis of the envelopes of the signal parts by a peak detecting circuit and a bottom detecting circuit. The detected average potentials are compared with a reference voltage, and the resulting difference potentials are added to the reproduced signal by an adder to bring the average potentials of the VFO parts into agreement. Further, an unwanted part of the output signal of the adder corresponding thereto is replaced by a switch with the output signal of a signal generator, which has an average potential equal to the average potential of the VFO parts brought into agreement.

摘要翻译： 信号再现系统在再现来自具有记录在不同记录形式的信号的具有共存记录区域的光记录介质的信号的情况下，稳定地鉴别信号。 构成再现信号的部件分别由来自其中包括预格式区域和数据区域的光记录介质的相应信号检测器导出为共存记录区域。 基于由峰值检测电路和底部检测电路的信号部分的包络来检测分别包含在再现信号部分中的VFO部分的平均电位。 将检测到的平均电位与参考电压进行比较，并通过加法器将所得差分电位加到再现信号上，使VFO部分的平均电位一致。 此外，与其对应的加法器的输出信号的不希望的部分由具有信号发生器的输出信号的开关代替，该信号发生器具有等于VFO部分的平均电位的平均电位。

公开(公告)号：US5270987A

公开(公告)日：1993-12-14

申请号：US509743

申请日：1990-04-17

申请人： Toshimitsu Kaku ,  Shigeru Nakamura ,  Masahiko Takahashi ,  Toshio Niihara ,  Harukazu Miyamoto ,  Norio Ohta ,  Takeshi Nakao ,  Hirofumi Sukeda ,  Masahiro Ojima ,  Takashi Toyooka ,  Tsuneo Suganuma ,  Fumiyoshi Kirino ,  Yoshinori Miyamura

发明人： Toshimitsu Kaku ,  Shigeru Nakamura ,  Masahiko Takahashi ,  Toshio Niihara ,  Harukazu Miyamoto ,  Norio Ohta ,  Takeshi Nakao ,  Hirofumi Sukeda ,  Masahiro Ojima ,  Takashi Toyooka ,  Tsuneo Suganuma ,  Fumiyoshi Kirino ,  Yoshinori Miyamura

IPC分类号： G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10584 ,  G11B11/10536 ,  G11B11/10545 ,  G11B11/10552 ,  G11B11/10558 ,  G11B11/10593 ,  G11B11/10571

摘要： A magnetic field of a polarity corresponding to information to be recorded is applied while a recording spot having a high energy is irradiated to a magneto-optical recording medium to record domains representing the information along a track. The recorded domains are read out by a reproducing spot having a lower energy than the recording spot and a high resolution power along the track. A recording head has an optical system for irradiating the recording spot having the high energy to the magneto-optical recording medium and a magnetic head for applying a magnetic field having a polarity thereof switched in accordance with the information to be recorded, to an irradiation area of the recording spot, a reproducing head has an optical system for irradiating the reproducing spot having the low energy by a laser beam having a wavelength of no larger than 600 nm and a magneto-optical signal detector for detecting a displacement of a polarization plane of a reflected light of the reproducing spot to read out the recording domains. The magneto-optical recording medium is made of a recording film having a multi-layer structure of alternate lamination of metal layers and dielectric layers.

摘要翻译： 将具有高能量的记录点照射到磁光记录介质上，记录与记录信息对应的极性的磁场，记录表示信息沿着轨迹的域。 记录的区域由具有比记录点更低的能量的再现点和沿着轨道的高分辨率电力读出。 记录头具有用于向磁光记录介质照射具有高能量的记录点的光学系统和用于根据要记录的信息将其极性切换的磁场施加到照射区域 的记录点，再现头具有用于通过具有不大于600nm的波长的激光束照射具有低能量的再现点的光学系统和用于检测偏振面的位移的磁光信号检测器 再现点的反射光读出记录区域。 磁光记录介质由具有金属层和电介质层的交替叠层的多层结构的记录膜制成。