公开(公告)号：US06781930B2

公开(公告)日：2004-08-24

申请号：US09897135

申请日：2001-07-03

申请人： Atsushi Fukumoto

发明人： Atsushi Fukumoto

IPC分类号： G11B7095

CPC分类号： G02B5/1866 ,  G11B7/0903 ,  G11B7/0956 ,  G11B7/1353 ,  G11B7/1381

摘要： An optical pick-up generates a 0-th order diffraction light and ±1st order diffraction lights by a diffraction grating and irradiates the same to an optical disc. The ±1st order diffraction lights have phase distributions equivalent to a wavefront aberration of the optical disc when there is a tilt in the optical disc. Distances between the center of the main optical spot and centers of sub optical spots in a disc radial direction on a recording surface are whole multiples of a track pitch. The generation circuit generates a main push-pull signal corresponding to the 0-th order diffraction light and first and second sub push-pull signals corresponding to the ±1st order diffraction lights and generates tracking error signals TE as differential push-pull signals obtained by subtracting a sum signal of the first and second sub push-pull signals from the main push-pull signal.

摘要翻译： 光拾取器通过衍射光栅产生0级衍射光和±1级衍射光，并将其照射到光盘。 当光盘中有倾斜时，±1级衍射光具有相当于光盘的波前像差的相位分布。 主光点的中心与记录面上盘径向的副光点的中心之间的距离为轨道间距的整数倍。 发电电路产生对应于0级衍射光的主推挽信号和对应于±1级衍射光的第一和第二副推挽信号，并产生跟踪误差信号TE作为差分推挽信号， 从主推挽信号中减去第一和第二副推挽信号的和信号。

公开(公告)号：US06754154B1

公开(公告)日：2004-06-22

申请号：US09498383

申请日：2000-02-03

申请人： Ryuji Takeda ,  Seiichiro Oishi ,  Tetsuhiro Shiomi

发明人： Ryuji Takeda ,  Seiichiro Oishi ,  Tetsuhiro Shiomi

IPC分类号： G11B7095

CPC分类号： G11B7/0956 ,  G11B7/00 ,  G11B7/0945

摘要： The object of the present invention is to propose an optical disk driving apparatus, an optical disk driving method and an optical disk apparatus capable of reducing the occurrence of disturbance to focus servo control and tracking servo control. In the optical disk driving apparatus, a tilt driving section (27) is provided with waveform shaping unit for shaping a driving current waveform driving a tilt motor (28) for changing the angle of an optical pickup (3) with respect to the rotating surface of an optical disk. Thus, it is possible to prevent the vibration of the optical pickup (3), to reduce disturbance derived from the vibration of an objective lens (8) to focus control and tracking control and to suppress mechanical noise while tilt driving is being performed. Besides, since there is no need to provide a tilt sensor, the optical pickup (3) can be made small in size and therefore, the smaller-sized optical disk driving apparatus can be provided.

摘要翻译： 本发明的目的是提出一种能够减少对聚焦伺服控制和跟踪伺服控制的干扰的发生的光盘驱动装置，光盘驱动方法和光盘装置。 在光盘驱动装置中，倾斜驱动部分（27）设置有波形整形单元，用于对驱动倾斜电机（28）的驱动电流波形进行整形，以改变光学拾取器（3）相对于旋转表面的角度 的光盘。 因此，可以防止光学拾取器（3）的振动，以减少由物镜（8）的振动导致的干扰，从而聚焦控制和跟踪控制，并且在进行倾斜驾驶时抑制机械噪声。 此外，由于不需要提供倾斜传感器，因此可以使光学拾取器（3）尺寸变小，因此可以提供较小尺寸的光盘驱动装置。

公开(公告)号：US06744709B2

公开(公告)日：2004-06-01

申请号：US09798799

申请日：2001-03-02

申请人： Toshikazu Kobayashi

发明人： Toshikazu Kobayashi

IPC分类号： G11B7095

CPC分类号： G11B7/08511 ,  G11B2007/0013

摘要： In advance of the playback of an optical disk 11, the peaks of a focus error signal are detected, and the reference values of the focus error signal are set on the basis of the values of the peaks. In executing a layer jump, a kick signal for an object lens 13a is stopped from being outputted when the focus error signal exceeds the reference value of one polarity. A brake signal is outputted when the focus error signal exceeds the reference value in the opposite polarity. A time period for which the brake signal is outputted, is set on the basis of a time period for which the kick signal has been outputted. After the stop of the output of the brake signal, the peak of the focus error signal is waited for, whereupon a focusing servo 21 is turned ON.

摘要翻译： 在光盘11的再现之前，检测聚焦误差信号的峰值，并且基于峰值设定聚焦误差信号的参考值。 在执行层跳跃时，当聚焦误差信号超过一个极性的参考值时，停止用于物镜13a的反转信号被输出。 当聚焦误差信号超过相反极性的基准值时，输出制动信号。 基于已经输出了起搏信号的时间段来设定输出制动信号的时间段。 在制动信号的输出停止之后，等待聚焦误差信号的峰值，于是聚焦伺服机构21被接通。

公开(公告)号：US06606284B1

公开(公告)日：2003-08-12

申请号：US09444571

申请日：1999-11-19

申请人： Masato Sakamoto ,  Katsunori Tamamura ,  Kazuhiko Oogami ,  Norikazu Tada ,  Atsushi Kusaka ,  Akihito Fujiwara ,  Mayumi Takahashi

发明人： Masato Sakamoto ,  Katsunori Tamamura ,  Kazuhiko Oogami ,  Norikazu Tada ,  Atsushi Kusaka ,  Akihito Fujiwara ,  Mayumi Takahashi

IPC分类号： G11B7095

CPC分类号： G11B7/126 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/0941 ,  G11B7/0945 ,  G11B20/10009

摘要： A gain controlling apparatus includes a pre-amplifier for roughly adjusting a gain of a generation signal, which is generated on the basis of a reception signal from an optical disc; a variable amplifier for finely adjusting the gain on the basis of the roughly adjusted gain by the pre-amplifier; a memory for storing a plurality of values for adjusting the gain generated during a previous occasion of gain adjustment in time series; and a controlling device for controlling the pre-amplifier at a current occasion of gain adjustment on the basis of the respective stored values for adjusting the gain and controlling the variable amplifier, wherein the controlling device comprises a predicting device for predicting a current adjustment value, namely an adjusted value for the gain roughly adjusted at the current occasion by the pre-amplifier, and the controlling device controls the pre-amplifier on the basis of the predicted current adjustment value.

摘要翻译： 增益控制装置包括：前置放大器，用于粗略地调整基于来自光盘的接收信号产生的发生信号的增益; 一个可变放大器，用于根据前置放大器粗略调节的增益来精细调整增益; 存储器，用于存储用于调整在先前的时间序列增益调整期间产生的增益的值; 以及控制装置，用于根据用于调节增益的各个存储值和控制可变放大器，在当前增益调整的情况下控制前置放大器，其中控制装置包括用于预测当前调整值的预测装置， 即通过前置放大器在当前情况下大致调整的增益的调整值，并且控制装置根据预测的电流调整值来控制前置放大器。

公开(公告)号：US06603717B1

公开(公告)日：2003-08-05

申请号：US09560894

申请日：2000-04-28

申请人： Yuichi Kawada ,  Hiroshi Oyabu

发明人： Yuichi Kawada ,  Hiroshi Oyabu

IPC分类号： G11B7095

CPC分类号： G11B7/0946 ,  G11B7/08511

摘要： In an optical disk reproducing device, through a provision of a control circuit, movement of focus point of laser beams is set at positions ahead or back to the focus position causing to enter into an automatic focus control loop, and a retry search signal for searching the focusing position is caused to be generated by the search signal generation means, thereby, a refocusing control in case when an automatic focusing servo loop can not be maintained can be started from the positions ahead or back to the focus position causing to enter into the automatic focus control loop.

摘要翻译： 在光盘再现装置中，通过设置控制电路，将激光束的聚焦点的移动设定在聚焦位置前方或后方的位置，从而进入自动聚焦控制环路，以及搜索重试搜索信号 由搜索信号产生装置产生聚焦位置，从而可以在从焦点位置的前方或后方开始进入自动聚焦伺服环路的情况下的重新聚焦控制，从而进入 自动对焦控制回路。

公开(公告)号：US06396778B2

公开(公告)日：2002-05-28

申请号：US09570288

申请日：2000-05-12

申请人： Yoshinari Takemura ,  Shigeru Furumiya ,  Takashi Ishida ,  Yoshito Aoki ,  Shunji Ohara ,  Yuichi Kamioka ,  Toyoji Gushima

发明人： Yoshinari Takemura ,  Shigeru Furumiya ,  Takashi Ishida ,  Yoshito Aoki ,  Shunji Ohara ,  Yuichi Kamioka ,  Toyoji Gushima

IPC分类号： G11B7095

CPC分类号： G11B7/0901 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0938 ,  G11B20/1252 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B2020/1232 ,  G11B2020/1239 ,  G11B2020/1267 ,  G11B2020/1274 ,  G11B2020/1287 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/2537

摘要： Address groups are composed of two of address blocks 16, 17, 18, and 19, where the address blocks 16, 17, 18, and 19 are disposed in a sector address region 5 and include identifiable information of address numbers 13 and overlapping sequential numbers 14. The address groups are disposed so that each group is alternately shifted from a track center 2 toward the inner periphery side or the outer periphery side, by a width substantially equal to half the track pitch, along the radius direction.

摘要翻译： 地址组由地址块16,17,18和19中的两个组成，其中地址块16,17,18和19被布置在扇区地址区5中，并且包括地址号13的可识别信息和重叠的连续数 地址组被设置成使得每个组沿着半径方向从轨道中心2向内周侧或外周侧交替地移动宽度大致等于轨道间距的一半的宽度。

公开(公告)号：US06385146B1

公开(公告)日：2002-05-07

申请号：US09223176

申请日：1998-12-30

申请人： In Ho Choi ,  Seong Pyo Hong

发明人： In Ho Choi ,  Seong Pyo Hong

IPC分类号： G11B7095

CPC分类号： G11B7/093

摘要： An actuator for optical pick-up using the concentrated magnetization method that is capable of moving an objective lens converging a laser light beam onto an optical disc. In the actuator, a lens holder is attached to the objective lens. Coils are wound around the lens holder to receive a current. A permanent magnet constructs a magnetic circuit along with the coils to generate a driving force for the objective lens and is magnetized to concentrate a magnetic flux toward the coils. The actuator can improve a driving sensitivity in a wide frequency band with the aid of the permanent magnet in which a magnetic flux density concentrates on the effective surfaces of the coils.

摘要翻译： 一种用于使用集中磁化方法的光学拾取器的致动器，其能够将会聚激光束的物镜移动到光盘上。 在致动器中，透镜保持器附接到物镜。 线圈缠绕在镜头架上以接收电流。 永磁体与线圈一起构成磁路，以产生用于物镜的驱动力并被磁化以将磁通集中到线圈。 致动器可以借助于其中磁通密度集中在线圈的有效表面上的永磁体来改善宽频带的驱动灵敏度。

公开(公告)号：US06339564B2

公开(公告)日：2002-01-15

申请号：US09734217

申请日：2000-12-12

申请人： Koichi Tezuka ,  Kyoko Miyabe ,  Satoshi Itami ,  Tohru Fujimaki ,  Kazushi Uno

发明人： Koichi Tezuka ,  Kyoko Miyabe ,  Satoshi Itami ,  Tohru Fujimaki ,  Kazushi Uno

IPC分类号： G11B7095

CPC分类号： G11B7/131 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/0908 ,  G11B7/0912 ,  G11B7/0916 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1359 ,  G11B7/1381 ,  G11B11/10543 ,  G11B11/10576 ,  G11B11/10597

摘要： An optical information recording/reproducing apparatus records information on and/or reproduces information from an optical recording medium based on a reflected light beam from the optical recording medium. The apparatus includes a light splitting part having a plurality of light splitting stages which split the reflected light beam from the optical recording medium into a plurality of light beams, and a photodetector unit including a plurality of photodetectors which receive the plurality of light beams from the light splitting part. The photodetector unit includes a plurality of photodetectors which receive light beams used to detect a focal error, at least one photodetector which receives a light beam used to detect a tracking error, and a plurality of photodetectors which receive light beams used to detect magneto-optic information recorded on the optical recording medium.

摘要翻译： 光信息记录/再现装置基于来自光记录介质的反射光束从光记录介质记录信息和/或再现信息。 该装置包括具有多个分光台的分光部，该多个分光台将来自光记录介质的反射光束分成多个光束;以及光检测器单元，包括多个光电检测器，其接收来自该光束的多个光束 分光部分。 光检测器单元包括多个光电检测器，其接收用于检测焦点误差的光束，至少一个接收用于检测跟踪误差的光束的光电检测器，以及接收用于检测磁光的光束的多个光电检测器 记录在光学记录介质上的信息。

公开(公告)号：US06339563B2

公开(公告)日：2002-01-15

申请号：US09725239

申请日：2000-11-29

申请人： Kazushi Mori ,  Atsushi Tajiri ,  Yasuaki Inoue ,  Takenori Goto ,  Minoru Sawada ,  Akira Ibaraki ,  Daisuke Ide

发明人： Kazushi Mori ,  Atsushi Tajiri ,  Yasuaki Inoue ,  Takenori Goto ,  Minoru Sawada ,  Akira Ibaraki ,  Daisuke Ide

IPC分类号： G11B7095

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/094

摘要： A grating surface of a diffraction grating diffracts a laser beam emitted from a semiconductor laser device in ±1st order directions. The grating surface is formed in a rectangular or elliptic shape in such dimensions that a light spot formed on an objective lens by ±1st order diffracted beams is located in an aperture of the objective lens and not displaced from the aperture even if the objective lens is horizontally moved in a tracking operation. A grating surface of another diffraction grating has a width smaller than the width of an overlap region of a light spot on the diffraction grating corresponding to a part of a beam, diffracted in the +1st direction, entering an objective lens and a light spot on the diffraction grating corresponding to a part of a beam, diffracted in the −1st direction, entering the objective lens.

摘要翻译： 衍射光栅的光栅表面衍射从半导体激光器件发射的激光束的±1级方向。 光栅表面形成为矩形或椭圆形，其尺寸使得物镜上形成的±1阶衍射光束的光点位于物镜的孔径中，即使物镜为 在跟踪操作中水平移动。 另一个衍射光栅的光栅表面的宽度小于衍射光栅上与光束的一部分相对应的光点的重叠区域的宽度，该光束的一部分在+ 1方向衍射，进入物镜和光点 衍射光栅对应于在第一方向衍射的光束的一部分，进入物镜。

公开(公告)号：US06307820B2

公开(公告)日：2001-10-23

申请号：US09796829

申请日：2001-03-01

申请人： Noriyoshi Takeya ,  Hideki Kobayashi

发明人： Noriyoshi Takeya ,  Hideki Kobayashi

IPC分类号： G11B7095

CPC分类号： G11B7/0945 ,  G11B7/005 ,  G11B7/08523 ,  G11B7/0901 ,  G11B7/0908 ,  G11B19/12 ,  G11B2007/0013

摘要： An apparatus for reproducing a multiple layer disk, which comprising a plurality of layers each having an information record surface on which record information is recorded, is provided with: a read device for reading the record information from each of the layers; a reproduction process device for applying a predetermined reproduction process to the record information read by the read device in accordance with a reproduction process parameter, which is set therein and which comprises at least one of a gain value and an equalizer value, to thereby output a reproduction information signal; a drive device for driving the read device to jump from one reading state for reading one of the layers to another reading state for reading another of the layers; a memory for storing a plurality of reproduction process parameters corresponding to the layers in advance of reproduction; and a set device for reading out one of the stored reproduction process parameters, corresponding to another of the layers as a destination of jumping of the read device, from the memory and setting the read out reproduction process parameter in the reproduction process device, in case that the read device is driven to jump by the drive device.

摘要翻译： 一种用于再现多层盘的装置，包括多个层，每层具有记录有记录信息的信息记录表面，其具有：读取装置，用于从每个层读取记录信息; 一种再现处理装置，用于根据在其中设置的再现处理参数对由读取装置读取的记录信息应用预定的再现处理，并且包括增益值和均衡器值中的至少一个，从而输出 再现信息信号; 驱动装置，用于驱动读取装置从一个读取状态跳跃以读取其中一个层到另一读取状态，用于读取另一个层; 存储器，用于在再现之前存储与所述层对应的多个再现处理参数; 以及设置装置，用于从存储器读出对应于作为读取装置的跳跃的目的地的另一个层的所存储的再现处理参数之一，并且在再现处理装置中设置读出的再现处理参数， 读取设备被驱动以由驱动设备跳转。