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1.发明授权Track retrieving method for making a light beam jump and scan from one track to another 失效跟踪检索方法，使光束跳跃并从一个轨道扫描到另一个轨道
公开(公告)号：US5566141A
公开(公告)日：1996-10-15
申请号：US226881
申请日：1994-04-13
IPC分类号： G11B7/007 , G11B7/085 , G11B11/105 , G11B17/22
CPC分类号： G11B7/08517 , G11B7/00718 , G11B7/08529 , G11B11/10563
摘要： A track retrieving method for making a light beam shift to a target track is provided in an apparatus in which at least one of a writing operation and a reading operation of information is performed to an information medium. A tracking control is applied to the information medium so as to make the light beam position on track. The information medium has tracks such that the polarity of the tracking control is alternately inverted between tracks. The method includes the steps of: making the light beam shift toward the target track, after the tracking control is made non-operational; and detecting a tracking error between the light beam and the track. The method also includes: generating a tracking error signal corresponding to the tracking error; generating a track middle-point signal for detecting a middle-point between adjacent tracks of the information medium based on a change of a polarity of a differentiation signal obtained by differentiating the tracking error signal; and generating a deceleration pulse for decelerating a shift of the light beam according to the track middle-point signal. The method also includes the steps of inverting the polarity of the tracking control before the deceleration pulse is completed, and again operating the tracking control, after the deceleration pulse is completed, to make the light beam position on the target track.
摘要翻译： 在向信息介质执行写入操作和信息读取操作中的至少一个的装置中提供了用于使光束移动到目标轨道的轨道检索方法。 将跟踪控制应用于信息介质，以使光束位置在轨道上。 信息介质具有轨道，使得跟踪控制的极性在轨道之间交替地反转。 该方法包括以下步骤：在跟踪控制不可操作之后使光束向目标轨道移动; 并且检测光束和轨道之间的跟踪误差。 该方法还包括：产生对应于跟踪误差的跟踪误差信号; 基于通过对跟踪误差信号进行微分获得的微分信号的极性的变化，生成轨道中点信号，用于检测信息介质的相邻轨道之间的中点; 以及根据轨道中点信号产生减速光束的偏移的减速脉冲。 该方法还包括以下步骤：在减速脉冲完成之前反转跟踪控制的极性，并且在减速脉冲完成之后再次操作跟踪控制，以使目标轨道上的光束位置。
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2.发明授权Method for causing a light beam to jump from an initial track to a target track 失效用于使光束从初始轨迹跳转到目标轨道的方法
公开(公告)号：US5650984A
公开(公告)日：1997-07-22
申请号：US463041
申请日：1995-06-05
IPC分类号： G11B7/007 , G11B7/085 , G11B11/105 , G11B7/00
CPC分类号： G11B7/08517 , G11B7/00718 , G11B7/08529 , G11B11/10563
摘要： A method and apparatus for jumping from an initial track to a target track on a medium having tracks of alternating polarity uses a combination of two-track and one-track jumps to jump to the target track. Detection of the jump middle-point for a two-track jump includes detecting a zero crossing in a tracking error signal. Detection of the jump middle-point for a one-track jump includes detecting a zero-crossing in a differential signal generated according to the tracking error signal. A target track several tracks away may be reached using consecutive two-track jumps, and if necessary, a single one-track jump.
摘要翻译： 在具有交替极性的轨道的介质上从初始轨迹跳跃到目标轨道的方法和装置使用双轨和单轨跳跃的组合来跳转到目标轨道。 用于双轨跳跃的跳跃中点的检测包括检测跟踪误差信号中的过零点。 用于单轨跳跃的跳跃中点的检测包括检测根据跟踪误差信号产生的差分信号中的过零点。 可以使用连续的双轨跳跃达到多个轨道的目标轨迹，如果需要，可以单个单轨跳跃。
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3.发明授权Reference clock generator for sampled servo type disk unit and disk unit 失效用于采样伺服型磁盘单元和磁盘单元的参考时钟发生器
公开(公告)号：US5526332A
公开(公告)日：1996-06-11
申请号：US263783
申请日：1994-06-22
CPC分类号： G11B20/1403 , G11B27/3027 , G11B7/00745 , G11B7/0901 , G11B2220/20 , G11B7/0938
摘要： In a reference clock signal generator for generating a sampled servo format reference clock signal using a PLL circuit, an unique distance is detected by an output signal of a VCO in a state the PLL circuit is operated based on a clock signal which corresponds to a number of rotations of a disk in generating the reference clock signal. When the unique distance is detected, a dividing ratio of a frequency divider is changed to operate the PLL circuit based on a clock mark detecting signal. The dividing ratio is set so that an oscillation frequency of the VCO becomes constant before and after switching from the clock signal that corresponds to the number of rotations of the disk to the clock mark signal. A count of the frequency divider is preset to zero with the first clock mark signal after the detection of the unique distance and the detection of the clock marks thereafter is carried out based on the count of the frequency divider.
摘要翻译： 在用于使用PLL电路产生采样的伺服格式参考时钟信号的参考时钟信号发生器中，在PLL电路被操作的状态下，基于对应于数字的时钟信号的VCO的输出信号来检测唯一的距离 在产生参考时钟信号时盘的旋转。 当检测到唯一的距离时，改变分频器的分频比以基于时钟标记检测信号来操作PLL电路。 分频比被设定为使得在从与盘的转数相对应的时钟信号切换到时钟标记信号之前和之后，VCO的振荡频率变得恒定。 基于分频器的计数，在检测到唯一距离之后，利用第一时钟标记信号将分频器的计数预设为零，并且此后的时钟标记的检测被执行。
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公开(公告)号：US5444682A
公开(公告)日：1995-08-22
申请号：US301001
申请日：1994-09-06
申请人： Shinichi Yamada , Mitsurou Moriya , Hiroyuki Yamaguchi , Osamu Yamaguchi , Yoshihiro Kanda , Yasuki Matsumoto
发明人： Shinichi Yamada , Mitsurou Moriya , Hiroyuki Yamaguchi , Osamu Yamaguchi , Yoshihiro Kanda , Yasuki Matsumoto
CPC分类号： G11B7/0938 , G11B7/00718
摘要： In a tracking control apparatus of a recording and reproducing apparatus for an optical disk, information is recorded in groove tracks and land tracks of the optical disk and address information is recorded in an address area arranged to each of the groove tracks and the land tracks, a control signal corresponding to a positional deviation between a light beam spot and a track is derived on the basis of light reflected from the optical disk, and hence an address period in which the light beam spot traces the address area is derived. When the light beam spot traces the land track, a tracking operation is performed by a control signal which is invert in polarity to that of groove track, and when the light beam spot traces the address area, the tracking control is performed by a signal of the same polarity as that of the groove track.
摘要翻译： 在用于光盘的记录和再现装置的跟踪控制装置中，将信息记录在光盘的凹槽轨道和平台轨道中，地址信息被记录在布置到每个凹槽轨道和槽脊轨道的地址区域中， 基于从光盘反射的光导出对应于光束光点和光道之间的位置偏差的控制信号，因此导出光束点跟踪地址区域的寻址周期。 当光束斑点跟踪脊迹道时，通过极性反转到凹槽轨迹的控制信号执行跟踪操作，并且当光束斑点跟踪地址区域时，跟踪控制由 与凹槽轨道的极性相同。
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5.发明授权Focusing control apparatus using dynamic target value in relation to land/groove 失效使用相对于陆/沟的动态目标值对焦控制装置
公开(公告)号：US5732051A
公开(公告)日：1998-03-24
申请号：US413489
申请日：1995-03-30
申请人： Hiroyuki Yamaguchi , Mitsuro Moriya , Osamu Yamaguchi , Shin-ichi Yamada , Toshiyuki Kinou , Yoshihiro Kanda
发明人： Hiroyuki Yamaguchi , Mitsuro Moriya , Osamu Yamaguchi , Shin-ichi Yamada , Toshiyuki Kinou , Yoshihiro Kanda
CPC分类号： G11B7/00718 , G11B7/0908
摘要： A focusing control apparatus is provided for controlling focusing of a light beam on a recording medium. The apparatus includes a control mechanism for maintaining the focusing state of the light beam on the recording medium by moving a focus mechanism based on a comparison between an output signal indicative of the focusing state and a target value. The apparatus further includes a target value setting circuit for setting the target value at a first level when the light beam is irradiated on the land track portions of the recording medium; and for setting the target value at a second level when the light beam is irradiated on the groove track portions.
摘要翻译： 提供了一种聚焦控制装置，用于控制光束在记录介质上的聚焦。 该装置包括控制机构，用于通过基于指示聚焦状态的输出信号与目标值之间的比较来移动聚焦机构来保持光束在记录介质上的聚焦状态。 该装置还包括目标值设置电路，用于当光束照射在记录介质的脊迹部分上时，将目标值设置在第一水平; 并且当光束照射在凹槽轨道部分上时将目标值设置在第二水平。
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公开(公告)号：US06449232B1
公开(公告)日：2002-09-10
申请号：US09601379
申请日：2000-08-01
申请人： Masaya Kuwahara , Shinichi Yamada , Hiroyuki Yamaguchi , Masuo Maruyama , Masanari Mohri , Akihiro Sakaguchi , Yasuo Nishihara , Masayoshi Shioya
发明人： Masaya Kuwahara , Shinichi Yamada , Hiroyuki Yamaguchi , Masuo Maruyama , Masanari Mohri , Akihiro Sakaguchi , Yasuo Nishihara , Masayoshi Shioya
IPC分类号： G11B700
CPC分类号： G11B19/12 , G11B7/08511 , G11B7/08517 , G11B7/0945 , G11B2007/0006
摘要： Optical disks compliant with different standards are recorded or reproduced by a single recording/reproducing apparatus by a first step of determining a substrate thickness of the disk based on a focusing error signal, when a focusing section for bringing the light beam into a focus on the disk is moved in such a way as to approach or withdraw from the recording surface of the disk; a second step of performing any one step of determining the number of recording surfaces of the disk when the focusing section is moved in such a way as to approach or withdraw from the recording surface of the disk, and determining whether or not the disk can be recorded and reproduced using a tracking error signal detected when the light beam crosses the track.
摘要翻译： 通过第一步骤，通过单个记录/再现装置记录或再现基于聚焦误差信号的盘的基板厚度的光盘，当聚焦部分将光束聚焦在 盘以从盘的记录表面接近或退出的方式移动; 执行以下步骤：当聚焦部分以从盘的记录表面接近或退出的方式移动时确定盘的记录表面的数量的步骤，并且确定盘是否可以是 使用当光束穿过轨道时检测到的跟踪误差信号来记录和再现。
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公开(公告)号：US5140576A
公开(公告)日：1992-08-18
申请号：US611097
申请日：1990-11-08
IPC分类号： G11B7/085
CPC分类号： G11B7/08511
摘要： A method of and an apparatus for setting into operation a focusing control for bringing a focal point of a beam onto a recording surface of an optical disk such that the beam reproduces signals from the recording surface, in which a relative velocity between the focal point and the recording surface is detected on the basis of an output of a focusing error detection device for detecting a gap between the focal point and the recording surface and velocity of a displacement device for driving the focal point in a direction perpendicular to the recording surface is controlled on the basis of the detected relative velocity such that focusing control can be stably set into operation by starting focusing control after controlling the relative velocity.
摘要翻译： 一种用于设置操作的聚焦控制的方法和装置，用于将光束的焦点带到光盘的记录表面上，使得光束再现来自记录表面的信号，其中焦点和 基于用于检测焦点和记录表面之间的间隙的聚焦误差检测装置的输出来检测记录表面，并且控制用于驱动焦点在垂直于记录表面的方向上的位移装置的速度 基于检测到的相对速度，使得通过在控制相对速度之后开始聚焦控制，可以稳定地设置聚焦控制。
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8.发明授权Data-track search apparatus for locating a desired data track on a record carrier 失效用于在记录载体上定位所需数据轨道的数据轨道搜索装置
公开(公告)号：US5319623A
公开(公告)日：1994-06-07
申请号：US538556
申请日：1990-06-15
CPC分类号： G11B7/08529 , G11B7/08511
摘要： A data-track search apparatus is provided with: a tracking error detection unit for detecting a positioning error between a light beam on a record carrier and a track; a moving unit for moving the light beam on the record carrier in a direction traversing the tracks on the record carrier; a focusing control failure detection unit for detecting a focusing control failure, and a control unit for controlling the moving unit in response to an output signal from the tracking error detection unit during the search for a desired track. The control unit regulates the moving unit so as not to accelerate but to decelerate the moving unit in the event of a focusing control failure.
摘要翻译： 数据轨道搜索装置具有：跟踪误差检测单元，用于检测记录载体上的光束与轨道之间的定位误差; 移动单元，用于沿着横过记录载体上的轨道的方向移动记录载体上的光束; 用于检测聚焦控制故障的聚焦控制故障检测单元，以及用于在搜索期望的轨道期间响应于来自跟踪误差检测单元的输出信号来控制移动单元的控制单元。 控制单元调节移动单元以便不加速，但是在聚焦控制失败的情况下使移动单元减速。
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公开(公告)号：US5048001A
公开(公告)日：1991-09-10
申请号：US504289
申请日：1990-04-04
CPC分类号： G11B7/08535 , G11B21/081
摘要： In an apparatus for searching a desired track of a recording carrier by transferring and controlling the reproduction position of the pickup for reproducing the signal recorded on a recording carrier on the basis of reference transfer information, the traveling load is measured, and the value of the reference transfer information is corrected according to this measured value, so that the desired track may be searched stably. The transfer motor is driven so that the reproduction position may move at a constant velocity, and the traveling load is measured. The transfer motor is driven so that the moving speed of the reproduction position or the time for moving a specified distance may be predetermined specific value, and by this driving signal, the value corresponding to the traveling load is determined.
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公开(公告)号：US5491676A
公开(公告)日：1996-02-13
申请号：US261088
申请日：1994-06-15
CPC分类号： G11B7/0946 , G11B7/08517
摘要： A tracking control apparatus having a track jump detection device and a memory for storing driving signals for the tracking control detects a track jump, and when such a track jump has occured, makes the tracking control inoperative, decelerates the velocity of light beam caused by the track jump by driving a voice coil motor using signals inverted from the signals stored in the memory, and, thereby, restarts the tracking control quickly.
摘要翻译： 具有轨道跳跃检测装置和用于存储用于跟踪控制的驱动信号的存储器的跟踪控制装置检测轨道跳跃，并且当发生这种轨道跳跃时，使得跟踪控制不起作用，从而减小由 通过使用从存储在存储器中的信号反转的信号来驱动音圈电机，从而快速重新启动跟踪控制。
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