公开(公告)号：US07046604B2

公开(公告)日：2006-05-16

申请号：US10772679

申请日：2004-02-05

申请人： Takaharu Shigeta ,  Hiroki Kobayashi

发明人： Takaharu Shigeta ,  Hiroki Kobayashi

IPC分类号： G11B7/00

CPC分类号： G11B21/083 ,  G11B7/08582

摘要： Herein disclosed is a optical disc driving apparatus for driving an optical disc having a central axis, comprising: a turntable having a central axis, said turntable being adapted to retain an optical disc under the condition that said central axis of said turntable is axially aligned with said central axis of said optical disc; an optical pickup unit movable toward and away from said central axis of said turntable, said optical pickup unit being adapted to write or retrieve information from said optical disc retained by said turntable; a stepping motor having a plurality of coils; a detecting unit for detecting an exterior vibration while being vibrated in response to said exterior vibration; a driver IC for controlling said stepping motor to have said stepping motor assume two different operation states consisting of a first operation state to drive said stepping motor to ensure that said optical pickup unit is moved toward and away from said central axis of said turntable, and a second operation state to drive said stepping motor to ensure that said optical pickup unit fails to be moved toward and away from said central axis of said turntable; and a control signal producing unit for producing a control signal to have said driver IC supply control currents in association with said exterior vibration detected by said detecting unit to said coils of said stepping motor to have said stepping motor assume said second operation state after judging whether or not said exterior vibration detected by said detecting unit is larger in amplitude than a predetermined threshold level.

摘要翻译： 本文公开了一种用于驱动具有中心轴的光盘的光盘驱动装置，包括：具有中心轴的转盘，所述转盘适于在所述转台的所述中心轴线轴向对准的状态下保持光盘 所述光盘的所述中心轴线; 所述光学拾取单元适于从由所述转台保留的所述光盘写入或检索信息;光学拾取单元，其可移动到所述转盘的所述中心轴线并远离所述转盘的所述中心轴线; 具有多个线圈的步进电机; 检测单元，用于响应于所述外部振动而在振动的同时检测外部振动; 用于控制所述步进电机以使所述步进电机采取两个不同的操作状态的驱动器IC，所述操作状态由第一操作状态组成，以驱动所述步进电机，以确保所述光学拾取单元朝向和远离所述转台的所述中心轴线移动;以及 驱动所述步进电动机以确保所述光学拾取单元不能朝向和远离所述转台的所述中心轴线移动的第二操作状态; 以及控制信号产生单元，用于产生控制信号，以使所述驱动器IC将与所述检测单元检测到的所述外部振动相关联的所述控制电流提供给所述步进电机的所述线圈，以使得所述步进电机在判断是否为所述第二操作状态 或者不是由所述检测单元检测到的所述外部振动的幅度大于预定阈值水平。

公开(公告)号：US20080043579A1

公开(公告)日：2008-02-21

申请号：US11569517

申请日：2005-05-26

申请人： Takaharu Shigeta

发明人： Takaharu Shigeta

IPC分类号： G11B7/00

CPC分类号： G11B7/08582

摘要： In an optical pickup driving mechanism using a stepping motor, a feeding operation of an optical pickup can be stabilized even in a broad operating temperature environment. In executing an optical axis correction feeding operation in response to an amount of lens shift of an objective lens 5 of an optical pickup 3, a stepping motor controlling portion 23 drives a stepping motor 4 in a microstep drive mode to move a base 7 of the optical pickup 3 in a radial direction of an optical disk 1. At this time, a temperature sensor 17 senses an in-equipment temperature, and a driving current supply time deciding portion 31 sets a supply time width of a pulse driving current whose envelope is like a sinusoidal wave to a supply time width as a fixed value, which is longer than that at an ordinary time, or a supply time width, which is multiplied by a coefficient corresponding to the in-equipment temperature, to increase a current supply time of the driving current when the sensed in-equipment temperature is equal to or lower than a predetermined temperature.

摘要翻译： 在采用步进电机的光学拾取器驱动机构中，即使在宽的工作温度环境下，光拾取器的进给操作也能稳定。 在响应于光拾取器3的物镜5的透镜偏移量执行光轴校正馈送操作时，步进电机控制部23以微步驱动模式驱动步进电机4，以移动 光拾取器3在光盘1的径向方向上。 此时，温度传感器17感测设备内温度，驱动电流供给时间判定部31将包围像正弦波的脉冲驱动电流的供给时间宽度设定为供给时间宽度作为固定值 ，其比通常的时间长，或供给时间宽度乘以与设备内温度对应的系数，以在感测到的设备内温度相等时增加驱动电流的电流供应时间 达到或低于预定温度。

公开(公告)号：US07940607B2

公开(公告)日：2011-05-10

申请号：US12539861

申请日：2009-08-12

申请人： Takaharu Shigeta

发明人： Takaharu Shigeta

IPC分类号： G11B21/08

CPC分类号： G11B7/08582

摘要： In an optical pickup driving mechanism using a stepping motor, a feeding operation of an optical pickup can be stabilized even in a broad operating temperature environment. In executing an optical axis correction feeding operation in response to an amount of lens shift of an objective lens of an optical pickup, a stepping motor controlling portion drives a stepping motor in a microstep drive mode to move a base of the optical pickup in a radial direction of an optical disk. At this time, a temperature sensor senses an in-equipment temperature, and a driving current supply time deciding portion sets a supply time width of a pulse driving current whose envelope is like a sinusoidal wave to a supply time width as a fixed value, which is longer than that at an ordinary time, or a supply time width, which is multiplied by a coefficient corresponding to the in-equipment temperature, to increase a current supply time of the driving current when the sensed in-equipment temperature is equal to or lower than a predetermined temperature.

摘要翻译： 在采用步进电机的光学拾取器驱动机构中，即使在宽的工作温度环境下，光拾取器的进给操作也能稳定。 在响应于光学拾取器的物镜的透镜偏移量执行光轴校正馈送操作时，步进电机控制部分以微步驱动模式驱动步进电机，以使光拾取器的基座以径向 光盘方向。 此时，温度传感器检测设备内温度，驱动电流供给时间判定部将包围像正弦波的脉冲驱动电流的供给时间宽度设定为供给时间宽度为固定值， 比普通时间长的供电时间宽度，或乘以与设备内温度对应的系数的供电时间宽度，以便当检测到的设备内温度等于或等于 低于预定温度。

公开(公告)号：US20090296538A1

公开(公告)日：2009-12-03

申请号：US12539861

申请日：2009-08-12

申请人： Takaharu Shigeta

发明人： Takaharu Shigeta

IPC分类号： G11B7/085

CPC分类号： G11B7/08582

摘要： In an optical pickup driving mechanism using a stepping motor, a feeding operation of an optical pickup can be stabilized even in a broad operating temperature environment. In executing an optical axis correction feeding operation in response to an amount of lens shift of an objective lens of an optical pickup, a stepping motor controlling portion drives a stepping motor in a microstep drive mode to move a base of the optical pickup in a radial direction of an optical disk. At this time, a temperature sensor senses an in-equipment temperature, and a driving current supply time deciding portion sets a supply time width of a pulse driving current whose envelope is like a sinusoidal wave to a supply time width as a fixed value, which is longer than that at an ordinary time, or a supply time width, which is multiplied by a coefficient corresponding to the in-equipment temperature, to increase a current supply time of the driving current when the sensed in-equipment temperature is equal to or lower than a predetermined temperature.

摘要翻译： 在采用步进电机的光学拾取器驱动机构中，即使在宽的工作温度环境下，光拾取器的进给操作也能稳定。 在响应于光学拾取器的物镜的透镜偏移量执行光轴校正馈送操作时，步进电机控制部分以微步驱动模式驱动步进电机，以使光拾取器的基座以径向 光盘方向。 此时，温度传感器检测设备内温度，驱动电流供给时间判定部将包围像正弦波的脉冲驱动电流的供给时间宽度设定为供给时间宽度为固定值， 比普通时间长的供电时间宽度，或乘以与设备内温度对应的系数的供电时间宽度，以便当检测到的设备内温度等于或等于 低于预定温度。

公开(公告)号：US07623417B2

公开(公告)日：2009-11-24

申请号：US11569517

申请日：2005-05-26

申请人： Takaharu Shigeta

发明人： Takaharu Shigeta

IPC分类号： G11B7/00

CPC分类号： G11B7/08582

摘要： In an optical pickup driving mechanism using a stepping motor, a feeding operation of an optical pickup can be stabilized even in a broad operating temperature environment. In executing an optical axis correction feeding operation in response to an amount of lens shift of an objective lens of an optical pickup, a stepping motor controlling portion drives a stepping motor in a microstep drive mode to move a base of the optical pickup in a radial direction of an optical disk. At this time, a temperature sensor senses an in-equipment temperature, and a driving current supply time deciding portion sets a supply time width of a pulse driving current whose envelope is like a sinusoidal wave to a supply time width as a fixed value, which is longer than that at an ordinary time, or a supply time width, which is multiplied by a coefficient corresponding to the in-equipment temperature, to increase a current supply time of the driving current when the sensed in-equipment temperature is equal to or lower than a predetermined temperature.

摘要翻译： 在采用步进电机的光学拾取器驱动机构中，即使在宽的工作温度环境下，光拾取器的进给操作也能稳定。 在响应于光学拾取器的物镜的透镜偏移量执行光轴校正馈送操作时，步进电机控制部分以微步驱动模式驱动步进电机，以使光拾取器的基座以径向 光盘方向。 此时，温度传感器检测设备内温度，驱动电流供给时间判定部将包围像正弦波的脉冲驱动电流的供给时间宽度设定为供给时间宽度为固定值， 比普通时间长的供电时间宽度，或乘以与设备内温度对应的系数的供电时间宽度，以便当检测到的设备内温度等于或等于 低于预定温度。

公开(公告)号：US5682362A

公开(公告)日：1997-10-28

申请号：US661253

申请日：1996-06-10

申请人： Seiichi Suzuki ,  Hidefumi Ishibashi ,  Takaharu Shigeta ,  Katsumi Yamada

发明人： Seiichi Suzuki ,  Hidefumi Ishibashi ,  Takaharu Shigeta ,  Katsumi Yamada

IPC分类号： G11B7/085 ,  G11B21/08 ,  G11B17/22 ,  G11B5/596

CPC分类号： G11B21/085 ,  G11B21/081 ,  G11B21/083 ,  G11B7/08517 ,  G11B7/08529 ,  G11B7/08588 ,  G11B7/08541

摘要： The invention is directed at ensuring stable track accessing despite the presence of backlash in a pickup drive mechanism, and at providing a precise track accessing operation not affected by the relative position or relative speed between pickup and carriage at the time a track access start instruction is issued. To achieve this, when the track access start instruction is issued in a tracking condition in which the pickup is following a track on a recording medium, the carriage is caused to begin to move in a track access direction by the action of a coarse actuator, while the pickup is still kept on track of the recording medium by means of a fine actuator. When the position of the pickup relative to the carriage has reached a boundary of a switch-off range preset within a movable range of the pickup or moved outside the switch-off range, the track following action of the pickup by the fine actuator is stopped, and the pickup is moved to the target track by using coarse driving control and, as necessary, fine driving control in collaborating fashion.

摘要翻译： 本发明的目的在于尽管在拾取器驱动机构中存在间隙，并且提供在轨道存取开始指令是时刻不受拾取和滑架之间的相对位置或相对速度的影响的精确的轨道存取操作 发行。 为了实现这一点，当在拾取器跟随记录介质上的轨道的跟踪条件下发出轨道接入开始指令时，通过粗略致动器的动作使滑架开始沿轨道进入方向移动， 而拾音器仍然通过精细致动器保持在记录介质上。 当拾取器相对于托架的位置已经达到在拾取器的可移动范围内预设的关闭范围的边界或者移动到关闭范围之外时，停止通过精细致动器的拾取器的跟踪动作 ，并且通过使用粗略驾驶控制并且根据需要以协作的方式将拾取器移动到目标轨道。