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    Focusing control apparatus for optimally directing light onto a recording surface
    1.
    发明授权
    Focusing control apparatus for optimally directing light onto a recording surface 失效
    用于将光线最佳地引导到记录表面上的聚焦控制装置

    公开(公告)号：US06256273B1

    公开(公告)日：2001-07-03

    申请号：US09111435

    申请日：1998-07-07

    申请人： Norio Matsuda ,  Hiroyuki Abe ,  Shinichi Naohara ,  Hitoshi Yamazaki ,  Takashi Suzuki ,  Yuichi Kimikawa ,  Kenichi Takahashi

    发明人： Norio Matsuda ,  Hiroyuki Abe ,  Shinichi Naohara ,  Hitoshi Yamazaki ,  Takashi Suzuki ,  Yuichi Kimikawa ,  Kenichi Takahashi

    IPC分类号： G11B700

    CPC分类号： G11B7/0946 ,  G11B7/08511 ,  G11B7/0908 ,  G11B7/0948 ,  G11B2007/0013

    摘要： A focusing control apparatus is designed to perform a focus jumping operation successfully. The apparatus has reading device which irradiates read light to a recording medium 1 having information recording surfaces formed on at least two layers, respectively, receiving return light of the read light from the recording medium, and generating a read signal; and control device which executes a focus jumping process to generate a drive signal of a focusing actuator to move an optimum light converging position of the read light from one of the recording surfaces to the other based on a focusing error signal that is generated based on the return light. The apparatus further has drop-out detecting device which detects a drop-out of the read signal and vibration detecting device which detects a vibration of the recording medium or reading device. The control device executes the focus jumping process only when the drop-out is not detected and a vibration detection level of the vibration detecting means is lower than a predetermined value.

    摘要翻译： 聚焦控制装置被设计成成功地执行聚焦跳跃操作。 该装置具有将读取光照射到具有形成在至少两层上的信息记录面的记录介质1的读取装置，分别从记录介质接收读取光的返回光，并产生读取信号; 以及控制装置，其执行聚焦跳跃处理，以产生聚焦致动器的驱动信号，以基于基于所述的聚焦误差信号将所述读取光的最佳聚光位置从所述记录表面之一移动到另一个 回灯 该装置还具有检测读取信号的丢失检测装置和检测记录介质或读取装置的振动的振动检测装置。 只有当没有检测到辍学并且振动检测装置的振动检测水平低于预定值时，控制装置才执行聚焦跳跃处理。

    Focus control apparatus
    2.
    发明授权
    Focus control apparatus 失效
    对焦控制装置

    公开(公告)号：US06091680A

    公开(公告)日：2000-07-18

    申请号：US102250

    申请日：1998-06-22

    申请人： Norio Matsuda ,  Takashi Suzuki ,  Kazushige Kawana ,  Hitoshi Yamazaki ,  Yuichi Kimikawa ,  Masakazu Takahashi ,  Kenichi Takahashi

    发明人： Norio Matsuda ,  Takashi Suzuki ,  Kazushige Kawana ,  Hitoshi Yamazaki ,  Yuichi Kimikawa ,  Masakazu Takahashi ,  Kenichi Takahashi

    IPC分类号： G11B7/00 ,  G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/08511 ,  G11B7/0945 ,  G11B2007/0013 ,  G11B7/0908

    摘要： Disclosed is a focus control apparatus of the present invention capable of successfully performing an accurate focus jump operation without an erroneous operation of a focus actuator. The apparatus irradiates a light beam onto a recording medium, and generates a focus actuator drive signal for moving an optimized light convergence point of the light beam from one recording surface to the other, based on a focus error signal generated based on a returned light from the recording medium. The focus control apparatus comprises a detector for detecting that the focus error signal crosses a predetermined level as a specified level crossing; instruction means for generating a focus jump instruction; a drive signal generating means for generating the drive signal in response to the focus jump instruction and receiving a detection output from the detection circuit to recognize a timing of a specified level crossing of the focus error signal upon receipt of the detection output, thereby extinguishing the drive signal at the timing of the specified level crossing detection timing; and inhibiting means for inhibiting the recognition of the specified level crossing by the drive signal generating section for a predetermined period in response to the focus jump instruction.

    摘要翻译： 公开了一种本发明的聚焦控制装置，其能够成功地执行精确的聚焦跳跃操作，而不会导致聚焦致动器的错误操作。 该装置将光束照射到记录介质上，并且基于基于从来自第一记录表面的返回光产生的聚焦误差信号，生成聚焦致动器驱动信号，用于将光束的优化光会聚点从一个记录表面移动到另一个记录表面 记录介质。 聚焦控制装置包括检测器，用于检测聚焦误差信号作为指定的电平交叉与预定电平相交; 用于产生聚焦跳转指令的指令装置; 驱动信号发生装置，用于响应于聚焦跳转指令产生驱动信号，并且在接收到检测输出时接收来自检测电路的检测输出，以识别聚焦误差信号的指定电平交叉的定时，由此熄灭 在指定的电平交叉检测定时的定时处的驱动信号; 以及禁止装置，用于响应于聚焦跳转指令，禁止由驱动信号产生部分预定时间段的指定电平交叉的识别。

    Focus control apparatus for multilayer optical recording medium
    3.
    发明授权
    Focus control apparatus for multilayer optical recording medium 失效
    用于多层光记录介质的聚焦控制装置

    公开(公告)号：US06246646B1

    公开(公告)日：2001-06-12

    申请号：US09114880

    申请日：1998-07-14

    申请人： Hiroyuki Abe ,  Shinichi Naohara ,  Takeshi Sato ,  Alex Bradshaw ,  Kazushige Kawana ,  Hideaki Watarihana ,  Norio Matsuda ,  Kenichi Takahashi

    发明人： Hiroyuki Abe ,  Shinichi Naohara ,  Takeshi Sato ,  Alex Bradshaw ,  Kazushige Kawana ,  Hideaki Watarihana ,  Norio Matsuda ,  Kenichi Takahashi

    IPC分类号： G11B709

    CPC分类号： G11B7/08511 ,  G11B7/0948 ,  G11B2007/0013

    摘要： A focus control apparatus for a multilayer optical recording medium performs an adequate focus jump on a multilayer optical recording medium. Threshold values are set according to the amount of a level change in a focus error signal of a loaded multilayer optical recording medium, and focus jump control is conducted based on the result of comparison between the level of the focus error signal and the set threshold values. Positive and negative threshold values to be compared with the level of the focus error signal to detect a zero-crossing point of the focus error signal are set in accordance with the amount of a level change in the focus error signal, after which an acceleration operation of the focus actuator is started in response to a focus jump instruction to shift the focus position of read light for a focus jump, the acceleration operation is stopped in accordance with zero-crossing detection, a deceleration operation of the focus actuator is started thereafter and is stopped in accordance with zero-crossing detection, so that the operation returns to the focus servo operation.

    摘要翻译： 用于多层光学记录介质的聚焦控制装置在多层光学记录介质上执行适当的聚焦跳跃。 根据加载的多层光学记录介质的聚焦误差信号中的电平变化量设定阈值，并且基于聚焦误差信号的电平与设定的阈值之间的比较结果进行聚焦跳跃控制 。 根据聚焦误差信号的电平变化量，设定要与聚焦误差信号的电平进行比较以检测聚焦误差信号的过零点的正和负阈值，然后加速操作 响应于聚焦跳转指令开始移动聚焦跳跃的读取光的焦点位置，根据过零检测停止加速操作，此后开始聚焦致动器的减速操作，并且 根据过零检测停止，使得操作返回到聚焦伺服操作。

    Focus jump control apparatus of a player for multilayer recording disc
    4.
    发明授权
    Focus jump control apparatus of a player for multilayer recording disc 失效
    用于多层记录盘的播放器的焦点跳跃控制装置

    公开(公告)号：US06151280A

    公开(公告)日：2000-11-21

    申请号：US105269

    申请日：1998-06-26

    申请人： Shinichi Naohara ,  Takashi Suzuki ,  Alex Bradshaw ,  Motoi Kimura ,  Norio Matsuda ,  Kazushige Kawana ,  Kenichi Takahashi

    发明人： Shinichi Naohara ,  Takashi Suzuki ,  Alex Bradshaw ,  Motoi Kimura ,  Norio Matsuda ,  Kazushige Kawana ,  Kenichi Takahashi

    IPC分类号： G11B7/00 ,  G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/08511 ,  G11B2007/0013 ,  G11B7/0945

    摘要： A focus jump control apparatus of a player for playing a multilayer recording disc surely achieves a focus jump. This apparatus includes: a focusing servo loop for allowing a focal point to trace a recording surface in accordance with a focusing error signal by using a focusing actuator to displace the focal point of read light to a disc in the optical axial direction; and a tracking servo loop for allowing the focal point to trace disc tracks. A loop opening/closing control unit opens/closes focusing/tracking servo loops in response to an instruction and closes the focusing servo loop when the movement of the focal point from one of the recording surfaces to the other. During the movement of the read light focal point, the closing state of the tracking servo loop is maintained. Jump driving means generates a drive signal of the actuator to move the focal point from one of the recording surfaces to the other based on the error signal under the opening/closing control of the focusing/tracking servo loops.

    摘要翻译： 用于播放多层记录盘的播放器的焦点跳跃控制装置确实实现了聚焦跳跃。 该装置包括：聚焦伺服环，用于通过使用聚焦致动器将读取光的焦点在光轴方向上移位到光盘，根据聚焦误差信号使焦点跟踪记录表面; 以及用于允许焦点跟踪盘轨迹的跟踪伺服环路。 环路打开/关闭控制单元响应于指令打开/关闭聚焦/跟踪伺服环路，并且当焦点从记录表面之一移动到另一个时闭合聚焦伺服环路。 在读取光焦点的运动期间，维持跟踪伺服环路的关闭状态。 跳转驱动装置根据在聚焦/跟踪伺服环路的打开/关闭控制下的误差信号产生致动器的驱动信号，以将焦点从记录表面之一移动到另一记录表面。

    Apparatus for detecting dropout, an error signal extracting unit, and unit for identifying type of dropout in an optical pickup
    8.
    发明授权
    Apparatus for detecting dropout, an error signal extracting unit, and unit for identifying type of dropout in an optical pickup 失效
    用于检测压差的装置，误差信号提取单元和用于识别光学拾取器中的压差类型的单元

    公开(公告)号：US06646962B2

    公开(公告)日：2003-11-11

    申请号：US09793729

    申请日：2001-02-27

    申请人： Takashi Sasaki ,  Takashi Suzuki ,  Takao Shimamura ,  Shinya Honjou ,  Kenichi Takahashi ,  Yoshihiro Hashizuka ,  Koichi Kikuchi ,  Hideaki Yoshimura

    发明人： Takashi Sasaki ,  Takashi Suzuki ,  Takao Shimamura ,  Shinya Honjou ,  Kenichi Takahashi ,  Yoshihiro Hashizuka ,  Koichi Kikuchi ,  Hideaki Yoshimura

    IPC分类号： G11B700

    CPC分类号： G11B7/0948 ,  G11B7/0941

    摘要： A servo control apparatus of an optical pickup is provided for reading recorded information from a recording medium and generates a read signal. The apparatus includes an error signal extracting part for extracting an error signal which indicates a deviation amount of a reading position from a target reading position of the optical pickup; a drive part for driving the optical pickup to change the reading position; an equalizer for equalizing the error signal and supplying a drive signal which indicates a driving amount of the drive part; a detecting part for detecting a dropout portion in the read signal; an identifying part for identifying a form of the dropout portion detected in the detecting part; and a controller. The controller performs control to change a gain of the equalizer in accordance with the identified form of the dropout portion.

    摘要翻译： 提供了一种用于从记录介质读取记录信息并产生读取信号的光学拾取器的伺服控制装置。 该装置包括误差信号提取部分，用于从光学拾取器的目标读取位置提取指示读取位置的偏差量的误差信号; 用于驱动光学拾取器以改变读取位置的驱动部件; 均衡器，用于均衡误差信号并提供指示驱动部分的驱动量的驱动信号; 用于检测读取信号中的压差部分的检测部分; 用于识别在所述检测部分中检测到的所述丢失部分的形式的识别部分; 和控制器。 控制器执行控制以根据所识别的出口部分的形式改变均衡器的增益。

    Method of and apparatus for setting servo adjustment value, reproducing information and recording information under servo control using servo adjustment value
    9.
    发明授权
    Method of and apparatus for setting servo adjustment value, reproducing information and recording information under servo control using servo adjustment value 失效
    用于设定伺服调整值的方法和装置，使用伺服调整值在伺服控制下再现信息和记录信息

    公开(公告)号：US06600705B2

    公开(公告)日：2003-07-29

    申请号：US09745258

    申请日：2000-12-20

    申请人： Takashi Suzuki ,  Takashi Sasaki ,  Hideaki Yoshimura ,  Koichi Kikuchi ,  Yoshihiro Hashizuka ,  Shinya Honjou ,  Kenichi Takahashi ,  Takao Shimamura

    发明人： Takashi Suzuki ,  Takashi Sasaki ,  Hideaki Yoshimura ,  Koichi Kikuchi ,  Yoshihiro Hashizuka ,  Shinya Honjou ,  Kenichi Takahashi ,  Takao Shimamura

    IPC分类号： G11B700

    CPC分类号： G11B7/0945 ,  G11B7/0941 ,  G11B2007/0013

    摘要： A servo adjustment apparatus for setting an adjustment value for servo control of at least one of optical recording of information on information recording surfaces and optical reproduction of information recorded on the information recording surfaces, is provided. A setting device sets an adjustment value corresponding to one of the information recording surfaces. Another setting device sets another adjustment value corresponding to another one of the surfaces other than the one of information recording surfaces. Then a calculation device calculates a relational value indicating a relationship between the adjustment value and another adjustment value. A storage device stores calculated relational value. A resetting device resets the adjustment value using another adjustment value set previously and the relational value when the adjustment value is reset, and resets another adjustment value using the adjustment value set previously and the relational value when another adjustment value is reset.

    摘要翻译： 提供一种伺服调整装置，用于设置用于信息记录表面上的信息的光学记录和记录在信息记录表面上的信息的光学再现中的至少一个的伺服控制的调整值。 设定装置设定与信息记录面之一对应的调整值。 另一设定装置设定与信息记录面以外的其他表面对应的另一调整值。 然后，计算装置计算表示调整值与另一调整值之间的关系的关系值。 存储设备存储计算的关系值。 复位装置使用先前设定的另一个调整值和调整值复位时的关系值来重置调整值，并使用先前设置的调整值和另一个调整值复位时的关系值复位另一个调整值。