公开(公告)号：US08315131B2

公开(公告)日：2012-11-20

申请号：US11496576

申请日：2006-08-01

申请人： Akihiro Ashida ,  Koji Kaniwa ,  Jinya Ikeda ,  Satoru Moriya

发明人： Akihiro Ashida ,  Koji Kaniwa ,  Jinya Ikeda ,  Satoru Moriya

IPC分类号： G11B7/00

CPC分类号： G11B7/0948 ,  G11B7/0956 ,  G11B7/121

摘要： In an optical disc apparatus, when a signal to be generated corresponding to an amount of reflected light from an optical disc has a signal level below a threshold level for a period exceeding a reference period, a controller controls an actuator to move an objective lens in a direction such that a distance from the optical disc surface to the objective lens increases. The reference period may be set based on a type of the optical disc and a recording or reproducing speed of the optical disc, or based on a surface deflection of the optical disc.

摘要翻译： 在光盘装置中，当与来自光盘的反射光量相对应的要生成的信号在超过参考周期的周期内具有低于阈值电平的信号电平时，控制器控制致动器使物镜移动 使得从光盘表面到物镜的距离增加的方向。 可以基于光盘的类型和光盘的记录或再现速度，或者基于光盘的表面偏转来设置参考周期。

公开(公告)号：US20070076542A1

公开(公告)日：2007-04-05

申请号：US11496576

申请日：2006-08-01

申请人： Akihiro Ashida ,  Koji Kaniwa ,  Jinya Ikeda ,  Satoru Moriya

发明人： Akihiro Ashida ,  Koji Kaniwa ,  Jinya Ikeda ,  Satoru Moriya

IPC分类号： G11B7/00

CPC分类号： G11B7/0948 ,  G11B7/0956 ,  G11B7/121

摘要： In an optical disc apparatus, a level of a first signal as a total signal corresponding to an amount of reflected light from an optical disc surface is compared to a threshold that an objective lens can maintain a focus state. Based on a result of the comparison, a second signal is generated having a first portion corresponding to the focus state of the objective lens and a second portion corresponding to a defocus state thereof. Then, it is determined whether sequential continuous time of the second portion of the second signal exceeds a reference waiting time. When the sequential continuous time exceeds the reference waiting time, the objective lens is made to back off by an actuator drive, as defocusing occurs.

摘要翻译： 在光盘装置中，将与来自光盘表面的反射光量相对应的总信号的第一信号的电平与物镜可以保持聚焦状态的阈值进行比较。 基于比较的结果，产生具有对应于物镜的焦点状态的第一部分和对应于其散焦状态的第二部分的第二信号。 然后，确定第二信号的第二部分的顺序连续时间是否超过参考等待时间。 当连续连续时间超过参考等待时间时，由于发生散焦，物镜被致动器驱动器反作用。

公开(公告)号：US07898930B2

公开(公告)日：2011-03-01

申请号：US12080180

申请日：2008-03-31

申请人： Jinya Ikeda

发明人： Jinya Ikeda

IPC分类号： G11B20/10

CPC分类号： G11B20/10203 ,  G11B7/0053 ,  G11B2020/1274

摘要： In an embodiment, an optical disk drive includes a land prepit detection circuit. With such circuit, if the optical disk drive reads a poor-quality disk on which, in terms of signals, LPP-like noises are caused by a defect of a land area, it is possible to increase the noise immunity and LPP detection accuracy of the optical disk drive so that the optical disk drive is capable of successfully detecting LPP without fail.

摘要翻译： 在一个实施例中，光盘驱动器包括焊盘预坑检测电路。 利用这样的电路，如果光盘驱动器读取质量差的盘，就信号而言，由于陆地区域的缺陷引起LPP样噪声，可以提高噪声抗扰度和LPP检测精度 光盘驱动器，使得光盘驱动器能够成功地检测LPP而不会失败。

公开(公告)号：US08121004B2

公开(公告)日：2012-02-21

申请号：US12464136

申请日：2009-05-12

申请人： Tetsuya Fushimi ,  Atsushi Yamada ,  Jinya Ikeda

发明人： Tetsuya Fushimi ,  Atsushi Yamada ,  Jinya Ikeda

IPC分类号： G11B7/00

CPC分类号： G11B7/00557 ,  G11B7/00718 ,  G11B7/1267 ,  G11B20/10009 ,  G11B2220/2537

摘要： A method for adjusting recording power of an optical disk apparatus having an output circuit that outputs recording light onto a test writing area of an optical disk, and a control circuit that adjusts the recording power of the recording light outputted from the output circuit, the method including the steps of causing the control circuit to erase a recording mark recorded onto the test writing area, to record a recording mark onto the test writing area in constant recording power lower than threshold power for starting a recording operation, and to record a recording mark onto the test writing area while changing the recording power.

摘要翻译： 一种用于调整具有将记录光输出到光盘的测试写入区域的输出电路的光盘装置的记录功率的调节方法，以及调节从输出电路输出的记录光的记录功率的控制电路， 包括使控制电路擦除记录在测试写入区域上的记录标记的步骤，将记录标记记录在低于用于开始记录操作的阈值功率的恒定记录功率下的测试写入区域上，并记录记录标记 在测试写入区域更改记录功能时。

公开(公告)号：US07965611B2

公开(公告)日：2011-06-21

申请号：US11412103

申请日：2006-04-27

申请人： Shigeki Yamazaki ,  Motoyuki Suzuki ,  Toshio Saitoh ,  Jinya Ikeda

发明人： Shigeki Yamazaki ,  Motoyuki Suzuki ,  Toshio Saitoh ,  Jinya Ikeda

IPC分类号： G11B7/135

CPC分类号： G11B7/1378 ,  G11B7/13925 ,  G11B19/12 ,  G11B2007/0006 ,  G11B2007/13727

摘要： In a three-wavelength-compliant optical disk apparatus, the present invention enables to shorten time required for starting the apparatus such as discrimination of an optical disk and adjustment of a beam-expander. At the time of starting the apparatus, the operation of a tray driver which pulls a loaded optical disk within the apparatus is conducted in parallel with the operation of a beam-expander driver which allows a movable lens of the beam-expander to move to a predetermined position in accordance with the kind of optical disk. Further, at the time of discriminating the disk, the number of times an optical disk of a specific kind has continuously been loaded into the apparatus to date is stored in a memory, and a sequence of discriminating the kind of optical disk that is newly discriminated is switched by referring to the history information.

摘要翻译： 在三波长兼容光盘装置中，本发明能够缩短启动设备所需的时间，例如光盘的识别和光束扩展器的调节。 在启动设备时，在装置内牵引加载的光盘的托盘驱动器的操作与扩束器驱动器的操作并行进行，该扩束器驱动器允许光束扩展器的可移动透镜移动到 根据光盘的种类进行预定位置。 此外，在识别盘时，将特定类型的光盘连续装入到装置中的次数存储在存储器中，并且识别新鉴别的光盘种类的顺序 通过参考历史信息来切换。

公开(公告)号：US20090073840A1

公开(公告)日：2009-03-19

申请号：US12080180

申请日：2008-03-31

申请人： Jinya Ikeda

发明人： Jinya Ikeda

IPC分类号： G11B5/09

CPC分类号： G11B20/10203 ,  G11B7/0053 ,  G11B2020/1274

摘要： According to one aspect of the present invention, there is provided an optical disk drive that is equipped with a land prepit detection circuit, the land prepit detection circuit including: a first peak hold circuit for inputting a push-pull signal to output a first peak voltage; a second peak hold circuit for inputting the push-pull signal through an LPF to output a second peak voltage; a bottom hold circuit for inputting the first peak voltage to output a bottom voltage; a slice level generation circuit for dividing the difference between the bottom voltage and the second peak voltage to generate a slice level used to detect a land prepit; and a comparator for comparing the push-pull signal with the slice level generated by the slice level generation circuit to detect the land prepit.As a result, even if the optical disk drive uses a poor-quality disk on which, in terms of signals, LPP-like noises are caused by a defect of a land area, it is possible to increase the noise immunity and LPP detection accuracy of the optical disk drive so that the optical disk drive is capable of successfully detecting LPP without fail.

摘要翻译： 根据本发明的一个方面，提供了一种配备有焊盘预坑检测电路的光盘驱动器，所述焊盘预坑检测电路包括：第一峰值保持电路，用于输入推挽信号以输出第一峰值 电压; 第二峰值保持电路，用于通过LPF输入推挽信号以输出第二峰值电压; 用于输入第一峰值电压以输出底部电压的底部保持电路; 切片电平生成电路，用于分割所述底部电压和所述第二峰值电压之间的差，以产生用于检测陆地预制坑的切片电平; 以及比较器，用于将推挽信号与由限幅电平发生电路产生的限幅电平进行比较，以检测地面预制坑。 结果，即使光盘驱动器使用质量差的盘，就信号而言，由于陆地区域的缺陷导致类似于LPP的噪声，因此可以提高噪声抗扰度和LPP检测精度 的光盘驱动器，使得光盘驱动器能够成功地检测LPP而不会失败。

公开(公告)号：US20070203913A1

公开(公告)日：2007-08-30

申请号：US11412103

申请日：2006-04-27

申请人： Shigeki Yamazaki ,  Motoyuki Suzuki ,  Toshio Saitoh ,  Jinya Ikeda

发明人： Shigeki Yamazaki ,  Motoyuki Suzuki ,  Toshio Saitoh ,  Jinya Ikeda

IPC分类号： G06F17/30

CPC分类号： G11B7/1378 ,  G11B7/13925 ,  G11B19/12 ,  G11B2007/0006 ,  G11B2007/13727

摘要： In a three-wavelength-compliant optical disk apparatus, the present invention enables to shorten time required for starting the apparatus such as discrimination of an optical disk and adjustment of a beam-expander. At the time of starting the apparatus, the operation of a tray driver which pulls a loaded optical disk within the apparatus is conducted in parallel with the operation of a beam-expander driver which allows a movable lens of the beam-expander to move to a predetermined position in accordance with the kind of optical disk. Further, at the time of discriminating the disk, the number of times an optical disk of a specific kind has continuously been loaded into the apparatus to date is stored in a memory, and a sequence of discriminating the kind of optical disk that is newly discriminated is switched by referring to the history information.

摘要翻译： 在三波长兼容光盘装置中，本发明能够缩短启动设备所需的时间，例如光盘的识别和光束扩展器的调节。 在启动设备时，在装置内牵引加载的光盘的托盘驱动器的操作与扩束器驱动器的操作并行进行，该扩束器驱动器允许光束扩展器的可移动透镜移动到 根据光盘的种类进行预定位置。 此外，在识别盘时，将特定类型的光盘连续装入到装置中的次数存储在存储器中，并且识别新鉴别的光盘种类的顺序 通过参考历史信息来切换。