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：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：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。