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。

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。

公开(公告)号：US06690632B1

公开(公告)日：2004-02-10

申请号：US09548263

申请日：2000-04-12

申请人： Takeshi Sato ,  Motoi Kimura ,  Alex Bradshaw ,  Norio Matsuda ,  Shinichi Naohara

发明人： Takeshi Sato ,  Motoi Kimura ,  Alex Bradshaw ,  Norio Matsuda ,  Shinichi Naohara

IPC分类号： G11B390

CPC分类号： G11B7/1369 ,  G11B7/0956 ,  G11B7/13927

摘要： A tilt servo apparatus which can correct a tilt error at a high speed and with high precision irrespective of a magnitude of the tilt error even if a response speed of a liquid crystal device decreases is provided. An amount of change and an increase/decrease of a signal intensity are detected by changing a correction value of a tilt error correcting arrangement by a first correction width, and a correction width of the correction value and a correcting direction are determined on the basis of the detection result. When the amount of change of the signal intensity is smaller than a predetermined amount of change, the correction width is changed to a second correction width which is smaller than a first correction width. When it is larger than the predetermined amount of change, the correction width is changed to a third correction width larger than the first correction width. The correction width is also determined in accordance with a change in environmental temperature.

摘要翻译： 提供了即使液晶装置的响应速度降低，也可以与倾斜误差的大小无关地以高精度校正倾斜误差的倾斜伺服装置。 通过将倾斜误差校正装置的校正值改变第一校正宽度来检测信号强度的变化量和增加/减小，并且基于校正值和校正方向确定校正值和校正方向的校正宽度 检测结果。 当信号强度的变化量小于预定量的变化量时，校正宽度变为小于第一校正宽度的第二校正宽度。 当其大于预定量的变化量时，校正宽度变为大于第一校正宽度的第三校正宽度。 校正宽度也根据环境温度的变化来确定。

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。

公开(公告)号：US06147942A

公开(公告)日：2000-11-14

申请号：US112004

申请日：1998-07-08

申请人： Hiroyuki Abe ,  Takeshi Sato ,  Kazushige Kawana ,  Hideaki Watarihana ,  Shinichi Naohara ,  Motoi Kimura ,  Yuichi Kimikawa ,  Masakazu Takahashi

发明人： Hiroyuki Abe ,  Takeshi Sato ,  Kazushige Kawana ,  Hideaki Watarihana ,  Shinichi Naohara ,  Motoi Kimura ,  Yuichi Kimikawa ,  Masakazu Takahashi

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

CPC分类号： G11B7/08511 ,  G11B2007/0013 ,  G11B7/08529 ,  G11B7/0945

摘要： A focus control apparatus for a multilayer optical recording medium which performs an appropriate focus jump on a multilayer optical recording medium. This focus control apparatus implements such focus jump control as to temporarily release a focus servo on one layer of a loaded multilayer optical recording medium, shift the focus position of read light on another target layer and then restart the focus servo on the another target layer, detects an ambient temperature, sets a drive signal condition according to the temperature detection output, and moves the focus position of the read light under the set drive signal condition. Specifically, this apparatus generates an acceleration signal to start moving the focus position of read light and a deceleration signal to decelerate movement of the focus position of the read light, as drive signals for a focus actuator in order to execute a focus jump operation, detects an ambient temperature of the focus actuator, and sets signal conditions for the acceleration signal and the deceleration signal according to the detected temperature.

摘要翻译： 一种用于在多层光学记录介质上执行适当的聚焦跳跃的多层光学记录介质的聚焦控制装置。 该聚焦控制装置实现这样的聚焦跳跃控制，以暂时释放加载的多层光记录介质的一层上的聚焦伺服，将读取光的聚焦位置移动到另一目标层上，然后在另一目标层上重新启动聚焦伺服， 检测环境温度，根据温度检测输出设定驱动信号状态，并在设定的驱动信号条件下移动读取光的聚焦位置。 具体地，该装置产生加速度信号，开始移动读取光的聚焦位置和减速信号，以减慢读取光的焦点位置的移动，作为聚焦致动器的驱动信号，以执行聚焦跳跃操作，检测 聚焦致动器的环境温度，并且根据检测到的温度设置用于加速度信号和减速信号的信号条件。

公开(公告)号：US06985412B1

公开(公告)日：2006-01-10

申请号：US09571536

申请日：2000-05-16

申请人： Alex Bradshaw ,  Yuichi Kimikawa ,  Shinichi Naohara ,  Norio Matsuda

发明人： Alex Bradshaw ,  Yuichi Kimikawa ,  Shinichi Naohara ,  Norio Matsuda

IPC分类号： G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/0908 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0946

摘要： Two sum output signals from two sets of the photodetector elements located symmetrically each other with respect to a light-receiving center of the photodetector of the optical pickup are amplified individually by two amplifiers. A focus error signal is generated in accordance with a difference between respective output levels of the two amplified signals. The gains of the two amplifiers are adjusted in accordance with the focus error signal. A predetermined bias voltage is applied to the focus error signal line in the focus servo control means in accordance with the focus error signal.

摘要翻译： 由两个放大器单独放大两组相对于光拾取器的光电检测器的光接收中心彼此对称设置的两个光检测元件的和输出信号。 根据两个放大信号的各个输出电平之间的差产生聚焦误差信号。 根据聚焦误差信号调整两个放大器的增益。 根据聚焦误差信号，在聚焦伺服控制装置中对聚焦误差信号线施加预定的偏置电压。

公开(公告)号：US06587409B1

公开(公告)日：2003-07-01

申请号：US09576901

申请日：2000-05-23

申请人： Hitoshi Yamazaki ,  Norio Matsuda ,  Alex Bradshaw ,  Shinichi Naohara

发明人： Hitoshi Yamazaki ,  Norio Matsuda ,  Alex Bradshaw ,  Shinichi Naohara

IPC分类号： G11B700

CPC分类号： G11B7/0956 ,  G11B7/08505 ,  G11B7/08511 ,  G11B7/0945 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

摘要： A tilt servo control apparatus has a tilt error correcting device for correcting a tilt error caused by a tilt angle defined between a normal at an irradiating position of a laser beam irradiated onto a recording surface of an optical recording medium and an optical axis of the laser beam. The tilt error correcting device is driven based on an intensity of the reflected light of the laser beam irradiated onto the recording surface. The apparatus provides a control to hold a drive value of the tilt error correcting device to a predetermined value in response to a track jump command for changing the irradiating position of the laser beam from the first irradiating position to the second irradiating position that is away therefrom by a distance corresponding to a predetermined number of tracks.

摘要翻译： 倾斜伺服控制装置具有倾斜误差校正装置，用于校正由照射到光记录介质的记录表面上的激光束的照射位置处的法线和激光光轴之间的倾角确定的倾斜误差 光束。 基于照射到记录表面上的激光束的反射光的强度来驱动倾斜误差校正装置。 响应于用于将激光束从第一照射位置的照射位置改变到远离其的第二照射位置的轨道跳转命令，该装置提供控制以将倾斜误差校正装置的驱动值保持在预定值 相对于预定数量的轨道的距离。

公开(公告)号：US06680886B1

公开(公告)日：2004-01-20

申请号：US09548264

申请日：2000-04-12

申请人： Shinichi Naohara ,  Takeshi Sato ,  Hitoshi Yamazaki ,  Norio Matsuda ,  Morio Nozaki

发明人： Shinichi Naohara ,  Takeshi Sato ,  Hitoshi Yamazaki ,  Norio Matsuda ,  Morio Nozaki

IPC分类号： G11B700

CPC分类号： G11B7/13927 ,  G11B7/0956

摘要： A tilt servo apparatus of an optical disc recording/reproducing apparatus, which includes sampling portion for sampling an RF envelope signal at every predetermined rotational angle on the basis of a rotation signal being synchronous with a rotation of the optical recording medium, calculating portion for calculating an average value of the sampled envelope intensities, and control portion for controlling a tilt error correction. The control portion determines the amount of the tilt error correction on the basis of the average value.

摘要翻译： 一种光盘记录/再现装置的倾斜伺服装置，包括：采样部分，用于根据与光学记录介质的旋转同步的旋转信号以每个预定的旋转角度对RF包络信号进行采样;计算部分，用于计算 采样包络强度的平均值，以及用于控制倾斜误差校正的控制部分。 控制部根据平均值来决定倾斜误差校正量。

公开(公告)号：US07106679B2

公开(公告)日：2006-09-12

申请号：US10632114

申请日：2003-08-01

申请人： Takashi Sasaki ,  Masao Yoshida ,  Kazunori Matsuo ,  Shinichi Naohara ,  Yasuhisa Okamoto

发明人： Takashi Sasaki ,  Masao Yoshida ,  Kazunori Matsuo ,  Shinichi Naohara ,  Yasuhisa Okamoto

IPC分类号： G11B7/00

CPC分类号： G11B20/1833 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10194 ,  G11B20/10481 ,  G11B20/10527 ,  G11B20/18 ,  G11B20/1803 ,  G11B2020/10537 ,  G11B2020/1062 ,  G11B2020/10814 ,  G11B2020/1099 ,  G11B2020/183

摘要： An information reproducing apparatus improved is provided with: an optical pickup (11) for reading record information recorded on an optical disc (100) and outputting a read signal; an error correction circuit (15) for executing an error correction process with respect to the outputted read signal and outputting output data through the error correction process corresponding to the record information; and a buffering memory device (17) for buffering the outputted output data. The apparatus is further provided with a microcomputer (20) for altering the error correction process in the error correction circuit depending on a memory status of the buffering memory device, if in the error correcting device, an error is detected in the read signal or an error ratio of the error becomes greater than a predetermined threshold value.

摘要翻译： 改进的信息再现装置设置有：用于读取记录在光盘（100）上并记录读取信号的记录信息的光学拾取器（11） 纠错电路（15），用于对所输出的读取信号执行纠错处理，并通过与记录信息对应的纠错处理输出输出数据; 以及用于缓冲输出的输出数据的缓冲存储器件（17）。 该装置还具有微型计算机（20），用于根据缓冲存储装置的存储状态改变纠错电路中的纠错处理，如果在纠错装置中在读信号中检测到错误或 误差的误差比变得大于预定的阈值。

公开(公告)号：US5953308A

公开(公告)日：1999-09-14

申请号：US150596

申请日：1998-09-10

申请人： Hiroshi Yokota ,  Ryuichi Naito ,  Hiroyuki Hirano ,  Katsumi Ishii ,  Shinichi Naohara ,  Yoshifumi Tsukuda ,  Kanya Matsumoto

发明人： Hiroshi Yokota ,  Ryuichi Naito ,  Hiroyuki Hirano ,  Katsumi Ishii ,  Shinichi Naohara ,  Yoshifumi Tsukuda ,  Kanya Matsumoto

IPC分类号： G11B21/02 ,  G11B7/0037 ,  G11B7/085 ,  G11B7/095 ,  G11B7/135 ,  G11B7/14 ,  G11B11/10 ,  G11B11/105 ,  G11B21/00 ,  G11B21/12 ,  G11B25/04

CPC分类号： G11B25/043 ,  G11B21/00 ,  G11B21/12 ,  G11B7/085 ,  G11B7/08582 ,  G11B7/095 ,  G11B7/1374 ,  G11B7/14 ,  G11B7/0037

摘要： A disc player includes: a plurality of pickup devices for reading information from a disc and a plurality of guide devices arranged radiately from a center of the disc, each for radially transferring one of the pickup devices. The guide devices are arranged so that each alternate pickup device is raised or lowered toward the inner circumferential portion of the disc.

摘要翻译： 盘片播放器包括：用于从盘读取信息的多个拾取装置和从盘的中心辐射布置的多个引导装置，每个用于径向传送拾取装置之一。 引导装置被布置成使得每个替代的拾取装置朝向盘的内周部分升高或降低。