公开(公告)号：US08559285B2

公开(公告)日：2013-10-15

申请号：US13565831

申请日：2012-08-03

申请人： Seiji Imagawa

发明人： Seiji Imagawa

IPC分类号： G11B7/00

CPC分类号： G11B7/0948

摘要： An optical disc apparatus includes a focus controller including a first digital filter, tracking controller including a second filter, focus actuator driver, tracking actuator driver, defect detector for detecting a defect on an optical disc, and a system controller for controlling the focus controller, the tracking controller and the defect detector. The system controller holds an input and output of at least one of either the focus controller or the tracking controller on the basis of the output of the defect detector, and sets an initial value in a delay memory of the digital filter of the controller held upon awake of the hold state.

摘要翻译： 光盘装置包括：聚焦控制器，包括第一数字滤波器，包括第二滤光器的跟踪控制器，聚焦致动器驱动器，跟踪致动器驱动器，用于检测光盘上的缺陷的缺陷检测器，以及用于控制聚焦控制器的系统控制器， 跟踪控制器和缺陷检测器。 系统控制器基于缺陷检测器的输出保持焦点控制器或跟踪控制器中的至少一个的输入和输出，并且将控制器的数字滤波器的延迟存储器中的初始值设置为 唤醒保持状态。

公开(公告)号：US08547809B2

公开(公告)日：2013-10-01

申请号：US12477538

申请日：2009-06-03

申请人： Seiji Imagawa ,  Yoshinori Ishikawa

发明人： Seiji Imagawa ,  Yoshinori Ishikawa

IPC分类号： G11B5/09 ,  G11B5/58 ,  G11B7/00 ,  G11B15/00

CPC分类号： G11B7/094

摘要： There is a need to prevent a possible erroneous detection of an off-track condition during recording to an optical disk. The above need can be addressed by, for example, determining an off-track condition has occurred when a light spot is located at least half-way from the track being recorded toward another track adjacent the track being recorded, and stopping a recording operation. In another example, the above need can be addressed by determining that off-track has occurred based on an output of a first off-track detector which detects that the light spot is off the track based on a wobble signal, an output of a second off-track detector which detects that the light spot is off the track based on a tracking error signal, and an output of a zero-cross detector which detects that the tracking error signal crosses zero based on an output of the tracking error signal.

摘要翻译： 需要防止在记录到光盘期间可能错误地检测偏离条件。 上述需要可以通过例如确定当光点至少位于正在记录的轨道的另一条轨道的一半的位置处发生的偏离条件时，并且停止记录操作来解决。 在另一示例中，可以通过基于基于摆动信号检测光点离开轨道的第一偏离轨道检测器的输出来确定已经发生偏离轨迹，来解决上述需要，第二 基于跟踪误差信号检测光斑离开轨道的偏离轨迹检测器，以及基于跟踪误差信号的输出检测跟踪误差信号越过零的零交叉检测器的输出。

公开(公告)号：US20130064058A1

公开(公告)日：2013-03-14

申请号：US13565831

申请日：2012-08-03

申请人： Seiji IMAGAWA

发明人： Seiji IMAGAWA

IPC分类号： G11B7/00

CPC分类号： G11B7/0948

摘要： An optical disc apparatus includes a focus controller including a first digital filter, tracking controller including a second filter, focus actuator driver, tracking actuator driver, defect detector for detecting a defect on an optical disc, and a system controller for controlling the focus controller, the tracking controller and the defect detector. The system controller holds an input and output of at least one of either the focus controller or the tracking controller on the basis of the output of the defect detector, and sets an initial value in a delay memory of the digital filter of the controller held upon awake of the hold state.

摘要翻译： 光盘装置包括：聚焦控制器，包括第一数字滤波器，包括第二滤光器的跟踪控制器，聚焦致动器驱动器，跟踪致动器驱动器，用于检测光盘上的缺陷的缺陷检测器，以及用于控制聚焦控制器的系统控制器， 跟踪控制器和缺陷检测器。 系统控制器基于缺陷检测器的输出保持焦点控制器或跟踪控制器中的至少一个的输入和输出，并且将控制器的数字滤波器的延迟存储器中的初始值设置为 唤醒保持状态。

公开(公告)号：US08325574B2

公开(公告)日：2012-12-04

申请号：US12336555

申请日：2008-12-17

申请人： Takeyoshi Kataoka ,  Seiji Imagawa ,  Munehiro Yonezawa

发明人： Takeyoshi Kataoka ,  Seiji Imagawa ,  Munehiro Yonezawa

IPC分类号： G11B7/00

CPC分类号： G11B7/0941 ,  G11B7/0945 ,  G11B7/0953

摘要： An optical disc device capable of preventing a current larger than prescribed in specifications from flowing by measuring amounts of variation in drive signals of the actuator or the spindle motor, and in view of a correlation between those amounts of variation in the drive signals and the amount of current, changing the servo control system characteristics according to measured amounts of variation, and setting a limit to the level of drive signals.

摘要翻译： 一种光盘装置，其能够通过测量致动器或主轴电动机的驱动信号的变化量来防止规格以上规定的电流流动，并且考虑到驱动信号的变化量与量之间的相关性 的电流，根据测量的变化量改变伺服控制系统特性，并设定对驱动信号电平的限制。

公开(公告)号：US20090296544A1

公开(公告)日：2009-12-03

申请号：US12477538

申请日：2009-06-03

申请人： Seiji IMAGAWA ,  Yoshinori ISHIKAWA

发明人： Seiji IMAGAWA ,  Yoshinori ISHIKAWA

IPC分类号： G11B20/10

CPC分类号： G11B7/094

摘要： There is a need to prevent a possible erroneous detection of an off-track condition during recording to an optical disk. The above need can be addressed by, for example, determining an off-track condition has occurred when a light spot is located at least half-way from the track being recorded toward another track adjacent the track being recorded, and stopping a recording operation. In another example, the above need can be addressed by determining that off-track has occurred based on an output of a first off-track detector which detects that the light spot is off the track based on a wobble signal, an output of a second off-track detector which detects that the light spot is off the track based on a tracking error signal, and an output of a zero-cross detector which detects that the tracking error signal crosses zero based on an output of the tracking error signal.

摘要翻译： 需要防止在记录到光盘期间可能错误地检测偏离条件。 上述需要可以通过例如确定当光点至少位于正在记录的轨道的另一条轨道的一半的位置处发生的偏离条件时，并且停止记录操作来解决。 在另一示例中，可以通过基于基于摆动信号检测光点离开轨道的第一偏离轨道检测器的输出来确定已经发生偏离轨迹，来解决上述需要，第二 基于跟踪误差信号检测光斑离开轨道的偏离轨迹检测器，以及基于跟踪误差信号的输出检测跟踪误差信号越过零的零交叉检测器的输出。

公开(公告)号：US20070177469A1

公开(公告)日：2007-08-02

申请号：US11488616

申请日：2006-07-19

申请人： Seiji Imagawa

发明人： Seiji Imagawa

IPC分类号： G11B7/00

CPC分类号： G11B7/1378 ,  G11B7/08511 ,  G11B7/13925 ,  G11B2007/0013

摘要： In an optical disc drive that needs an aberration correcting element for correcting spherical aberrations, it takes long time to conduct a processing operation of the aberration correcting element in an interlayer movement of a multilayer disc and a drive initializing operation. In order to eliminate the problem, an optical disc drive using a pickup includes a focus actuator for moving an objective lens in a rotation axis direction of a disc, a tracking actuator for moving the objective lens in a radial direction of the disc, an aberration corrector for correcting aberrations, and a feeder for moving the pickup in the disc radial direction. A control operation of the aberration corrector and a control operation of the feeder are conducted in parallel.

摘要翻译： 在需要用于校正球面像差的像差校正元件的光盘驱动器中，在多层盘的层间移动和驱动初始化操作中进行像差校正元件的处理操作需要很长时间。 为了消除该问题，使用拾取器的光盘驱动器包括用于沿盘的旋转轴方向移动物镜的聚焦致动器，用于沿盘的径向移动物镜的跟踪致动器，像差 用于校正像差的校正器，以及用于沿盘径向移动拾取器的馈送器。 平行地进行像差校正器的控制操作和馈线的控制操作。

公开(公告)号：US08634281B2

公开(公告)日：2014-01-21

申请号：US13410322

申请日：2012-03-02

申请人： Seiji Imagawa

发明人： Seiji Imagawa

IPC分类号： G11B7/00

CPC分类号： G11B7/0901 ,  G11B7/0908 ,  G11B7/0948 ,  G11B7/2405 ,  G11B2007/0009

摘要： The operability of an optical disc device for reading or writing data from/to a disc having a data layer and a servo layer is improved by increasing the resistance to control disturbances. An optical disc device in accordance with the present invention includes an objective lens, a relay lens, a blue-violet laser detector, a red laser detector, an objective lens focus actuator, an objective lens tracking actuator, a relay lens actuator, a pair of focus error signal generating units, a pair of focus control signal generating units, a switching unit for selecting a focus control signal, a pair of tracking error signal generating units, a pair of tracking control signal generating units, a switching unit for selecting a tracking control signal, a focus error conversion unit and a tracking error conversion unit.

摘要翻译： 通过增加对控制干扰的阻力来改善用于从具有数据层和伺服层的盘读/写数据的光盘装置的可操作性。 根据本发明的光盘装置包括物镜，中继透镜，蓝紫激光检测器，红色激光检测器，物镜聚焦致动器，物镜跟踪致动器，中继透镜致动器，一对 的聚焦误差信号发生单元，一对聚焦控制信号发生单元，用于选择聚焦控制信号的切换单元，一对跟踪误差信号生成单元，一对跟踪控制信号生成单元，用于选择 跟踪控制信号，聚焦误差转换单元和跟踪误差转换单元。

公开(公告)号：US20120230171A1

公开(公告)日：2012-09-13

申请号：US13410322

申请日：2012-03-02

申请人： Seiji IMAGAWA

发明人： Seiji IMAGAWA

IPC分类号： G11B7/00

CPC分类号： G11B7/0901 ,  G11B7/0908 ,  G11B7/0948 ,  G11B7/2405 ,  G11B2007/0009

摘要： The operability of an optical disc device for reading or writing data from/to a disc having a data layer and a servo layer is improved by increasing the resistance to control disturbances. An optical disc device in accordance with the present invention includes an objective lens, a relay lens, a blue-violet laser detector, a red laser detector, an objective lens focus actuator, an objective lens tracking actuator, a relay lens actuator, a pair of focus error signal generating units, a pair of focus control signal generating units, a switching unit for selecting a focus control signal, a pair of tracking error signal generating units, a pair of tracking control signal generating units, a switching unit for selecting a tracking control signal, a focus error conversion unit and a tracking error conversion unit.

摘要翻译： 通过增加对控制干扰的阻力来改善用于从具有数据层和伺服层的盘读/写数据的光盘装置的可操作性。 根据本发明的光盘装置包括物镜，中继透镜，蓝紫激光检测器，红色激光检测器，物镜聚焦致动器，物镜跟踪致动器，中继透镜致动器，一对 的聚焦误差信号发生单元，一对聚焦控制信号发生单元，用于选择聚焦控制信号的切换单元，一对跟踪误差信号生成单元，一对跟踪控制信号生成单元，用于选择 跟踪控制信号，聚焦误差转换单元和跟踪误差转换单元。

公开(公告)号：US08223602B2

公开(公告)日：2012-07-17

申请号：US11652938

申请日：2007-01-11

申请人： Seiji Imagawa

发明人： Seiji Imagawa

IPC分类号： G11B7/00 ,  G11B27/36 ,  G11B11/00

CPC分类号： G11B7/13927 ,  G11B7/0948 ,  G11B7/1378

摘要： With a high-density optical disc drive, although it is necessary to correct spherical aberrations which depend on a disc substrate thickness error, operation of an aberrations correction element takes time and therefore easy correction according to a disc radius degrades the operability of the apparatus. The present invention comprises an optical pickup unit including an objective lens and an aberrations correction lens, a focus actuator, a tracking actuator, a aberrations correction motor, a seek motor, an aberrations correction lens control module, a radius information detecting module, and a system control module.

摘要翻译： 利用高密度光盘驱动器，虽然需要校正取决于盘基板厚度误差的球面像差，但是像差校正元件的操作花费时间，因此根据盘半径的简单校正降低了设备的可操作性。 本发明包括一种包括物镜和像差校正透镜，聚焦致动器，跟踪致动器，像差校正马达，寻道马达，像差校正透镜控制模块，半径信息检测模块和 系统控制模块。

公开(公告)号：US07933175B2

公开(公告)日：2011-04-26

申请号：US11488616

申请日：2006-07-19

申请人： Seiji Imagawa

发明人： Seiji Imagawa

IPC分类号： G11B7/00

CPC分类号： G11B7/1378 ,  G11B7/08511 ,  G11B7/13925 ,  G11B2007/0013

摘要： In an optical disc drive that needs an aberration correcting element for correcting spherical aberrations, it takes long time to conduct a processing operation of the aberration correcting element in an interlayer movement of a multilayer disc and a drive initializing operation. In order to eliminate the problem, an optical disc drive using a pickup includes a focus actuator for moving an objective lens in a rotation axis direction of a disc, a tracking actuator for moving the objective lens in a radial direction of the disc, an aberration corrector for correcting aberrations, and a feeder for moving the pickup in the disc radial direction. A control operation of the aberration corrector and a control operation of the feeder are conducted in parallel.

摘要翻译： 在需要用于校正球面像差的像差校正元件的光盘驱动器中，在多层盘的层间移动和驱动初始化操作中进行像差校正元件的处理操作需要很长时间。 为了消除该问题，使用拾取器的光盘驱动器包括用于沿盘的旋转轴方向移动物镜的聚焦致动器，用于沿盘的径向移动物镜的跟踪致动器，像差 用于校正像差的校正器，以及用于沿盘径向移动拾取器的馈送器。 平行地进行像差校正器的控制操作和馈线的控制操作。