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173 条记录 (耗时 0.02 秒)

    INFORMATION RECORDING / REPRODUCING METHOD AND APPARATUS, AND INFORMATION REPRODUCING APPARATUS
    91.
    发明申请
    INFORMATION RECORDING / REPRODUCING METHOD AND APPARATUS, AND INFORMATION REPRODUCING APPARATUS 有权
    信息记录/再现方法和装置，以及信息再现装置

    公开(公告)号：US20130107686A1

    公开(公告)日：2013-05-02

    申请号：US13808497

    申请日：2010-07-15

    申请人： Yoshio Sasaki ,  Yasushi Oshima

    发明人： Yoshio Sasaki ,  Yasushi Oshima

    IPC分类号： G11B7/1263

    CPC分类号： G11B7/1263 ,  G11B7/08511 ,  G11B7/1267 ,  G11B2007/0013

    摘要： An information recording/reproducing method includes: setting light beam power from a light source, to second power P2, which is weaker than first power P1, and detecting the number of the recording layers provided for an optical disc; controlling an objective lens to focus the light beam on one recording layer which is the closest to the objective lens, in a condition that the detected number of the recording layers ≧3; setting the power of the light beam to third power P3, between P1 and P2; specifying the number of the recording layers provided for the optical disc on the basis of layer information, which is information associated with the one recording layer; and setting the power of the light beam to P1, reading the layer type information recorded in advance in the one recording layer, and specifying a disc type based on the read layer type information.

    摘要翻译： 信息记录/再现方法包括：将来自光源的光束功率设置为比第一功率P1弱的第二功率P2，以及检测为光盘提供的记录层的数量; 在检测到的记录层数= 3的条件下，控制物镜将光束聚焦在最靠近物镜的一个记录层上; 将光束的功率设置为P1和P2之间的第三功率P3; 基于与一个记录层相关联的信息的层信息指定为光盘提供的记录层的数量; 并且将光束的功率设置为P1，读取在一个记录层中预先记录的层类型信息，并且基于读取层类型信息指定光盘类型。

    OPTICAL DISC DRIVE
    92.
    发明申请
    OPTICAL DISC DRIVE 审中-公开
    光盘驱动器

    公开(公告)号：US20120257487A1

    公开(公告)日：2012-10-11

    申请号：US13377946

    申请日：2011-04-08

    申请人： Hiroaki Matsumiya ,  Kazuo Momoo

    发明人： Hiroaki Matsumiya ,  Kazuo Momoo

    IPC分类号： G11B7/135 ,  G11B7/1263 ,  G11B7/127

    CPC分类号： G11B7/1263

    摘要： An optical disc drive according to the present invention includes: a laser light source 2 for emitting a laser beam; a photodetector 10 for detecting a signal that has been supplied from an optical disc 100; and an optical system 200 for irradiating the optical disc 100 with the laser beam and guiding the light reflected from the optical disc 11 to the photodetector 10. The drive further includes a memory 300 for storing information defining a relation between the output value of the photodetector 10 and the output power of the laser light source 2 when the laser light source 2 is emitting the laser beam but the light reflected from the optical disc 100 fails to reach the photodetector 10; and a control section 400 for controlling the output power of the laser light source 2 based on the information stored in the memory 300 and the output of the photodetector 10 when the laser light source 2 is emitting the laser beam but the light reflected from the optical disc fails to reach the photodetector 10.

    摘要翻译： 根据本发明的光盘驱动器包括：用于发射激光束的激光光源2; 用于检测从光盘100提供的信号的光电检测器10; 以及用于用激光束照射光盘100并将从光盘11反射的光引导到光电检测器10的光学系统200.驱动器还包括存储器300，用于存储定义光电检测器的输出值之间的关系的信息 10，激光光源2发射激光时激光光源2的输出功率，但从光盘100反射的光不能到达光检测器10; 以及控制部400，用于根据存储在存储器300中的信息和当激光光源2发射激光而是从光学反射的光时控制光电检测器10的输出，来控制激光光源2的输出功率 光盘未能到达光电检测器10。

    LASER POWER CONTROL METHOD AND LASER POWER CONTROL APPARATUS
    93.
    发明申请
    LASER POWER CONTROL METHOD AND LASER POWER CONTROL APPARATUS 有权
    激光功率控制方法和激光功率控制装置

    公开(公告)号：US20120170436A1

    公开(公告)日：2012-07-05

    申请号：US13322923

    申请日：2011-05-31

    申请人： Kenji Fujiune ,  Takeharu Yamamoto

    发明人： Kenji Fujiune ,  Takeharu Yamamoto

    IPC分类号： G11B7/1263

    CPC分类号： G11B7/1267 ,  G11B7/0062

    摘要： With a large capacity of an optical disk and high-speed recording, a frequency of a recording signal is increased and a pulse width is narrowed. In the case that a laser is driven by a signal having the short pulse width, unfortunately the high-speed recording is hardly performed to an optical disk when a rise time and a fall time of the optical pulse are lengthened.During user data recording, a bottom driving current is set to a second bottom driving current value that is a current value of a threshold or less, so that the rise time and the fall time of the optical pulse can be shortened to perform the high-speed recording of the optical disk.

    摘要翻译： 利用大容量的光盘和高速记录，记录信号的频率增加并且脉冲宽度变窄。 在激光器由具有短脉冲宽度的信号驱动的情况下，不幸的是，当光脉冲的上升时间和下降时间延长时，几乎不对光盘执行高速记录。 在用户数据记录期间，将底部驱动电流设定为阈值以下的当前值的第二底部驱动电流值，从而能够缩短光脉冲的上升时间和下降时间， 速度记录光盘。

    Disk drive
    95.
    发明申请
    Disk drive 审中-公开
    磁盘驱动器

    公开(公告)号：US20050152247A1

    公开(公告)日：2005-07-14

    申请号：US10501331

    申请日：2003-01-17

    申请人： Shigekazu Minechika ,  Tadashi Okajima ,  Takanobu Hisamitsu

    发明人： Shigekazu Minechika ,  Tadashi Okajima ,  Takanobu Hisamitsu

    IPC分类号： G11B7/1263 ,  G11B7/005 ,  G11B19/28 ,  G11B5/09

    CPC分类号： G11B7/1267 ,  G11B7/005 ,  G11B11/10515 ,  G11B11/10595

    摘要： A disk apparatus includes a DSP (Digital Signal Processor), and the DSP performs a test writing and a test reading on a magneto-optical disk rotated in a ZCLV system to obtain an optimal reproduction laser power value (reference reproduction laser power value) “Pt” at a linear velocity of 30 Mbps in the ZCLV system. Next, by use of a relational expression between a power coefficient and a linear velocity, a linear velocity coefficient “αx” as an optimal reproduction laser power value at a desired linear velocity (zone) “Vx” in a ZCAV system is obtained when the reference reproduction laser power value is multiplied. Then, the optimal reproduction laser power value at the zone in the ZCAV system is obtained by multiplying the reference reproduction laser power value “Pt” by the linear velocity coefficient “αx”.

    摘要翻译： 磁盘装置包括DSP（数字信号处理器），并且DSP在以ZCLV系统旋转的磁光盘上执行测试写入和测试读取以获得最佳再现激光功率值（参考再现激光功率值）“ Pt“在ZCLV系统中的线速度为30Mbps。 接下来，通过使用功率系数和线速度之间的关系表达式，在ZCAV系统中在期望的线速度（区域）“Vx”处的线速度系数“alphax”作为最佳再现激光功率值获得，当 参考再生激光功率值相乘。 然后，通过将参考再现激光功率值“Pt”乘以线速度系数“alphax”来获得ZCAV系统中的区域处的最佳再现激光功率值。

    Information recording method and optical disk apparatus
    96.
    发明申请
    Information recording method and optical disk apparatus 审中-公开
    信息记录方法和光盘装置

    公开(公告)号：US20050094527A1

    公开(公告)日：2005-05-05

    申请号：US10937351

    申请日：2004-09-10

    申请人： Manabu Katsuki ,  Norimoto Ichikawa

    发明人： Manabu Katsuki ,  Norimoto Ichikawa

    IPC分类号： G11B7/0045 ,  G11B3/00 ,  G11B7/00 ,  G11B7/004 ,  G11B7/095 ,  G11B7/125 ,  G11B7/1263

    CPC分类号： G11B7/00458 ,  G11B7/0956 ,  G11B7/1263

    摘要： A method and apparatus for recording information which presume a recording state from reflected light during recording to achieve a stable recording quality. When recording information on an optical disk by irradiating laser light with a specified record power (Pw) to form a train of record pits, the recording is performed while forcing a value (CF) of B/Pw2 to be kept substantially constant, where B is the value obtainable by sample-hold of a reflection light amount upon irradiation of the laser light with the specified record power (Pw). Performing the recording in this way makes it possible to realize the recording quality with increased stability. In addition, upon alteration of a tilt angle, arithmetic processing is redone to thereby achieve the stability-enhanced recording quality.

    摘要翻译： 一种用于记录在记录期间从反射光确定记录状态以实现稳定的记录质量的信息的方法和装置。 当通过用指定的记录功率（Pw）照射激光来在光盘上记录信息以形成记录坑列时，在强制B / Pw <2 保持基本恒定，其中B是具有指定记录功率（Pw）的激光照射时通过反射光量的样本保持获得的值。 以这种方式进行记录，可以提高稳定性来实现记录质量。 此外，在改变倾斜角时，重新进行运算处理，从而实现稳定性提高的记录质量。

    Laser driver circuit with reduced noise and optical pickup circuit for use with the same
    97.
    发明申请
    Laser driver circuit with reduced noise and optical pickup circuit for use with the same 审中-公开
    具有降低噪声的激光驱动电路和与其一起使用的光拾取电路

    公开(公告)号：US20050002316A1

    公开(公告)日：2005-01-06

    申请号：US10882748

    申请日：2004-07-01

    申请人： Sho Maruyama

    发明人： Sho Maruyama

    IPC分类号： G11B7/125 ,  G11B7/00 ,  G11B7/085 ,  G11B7/12 ,  G11B7/1263 ,  H01L29/00 ,  H01S5/062 ,  H01S5/0683 ,  H03F3/08

    CPC分类号： G11B7/1263 ,  H01S5/0683 ,  H03F3/08

    摘要： An optical pickup with a laser driver circuit is provided to overcome an increase in size of an optical pickup, which is caused by a ferrite bead or capacitor being provided in a drive current path to reduce EMI noise effects. In an optical disc apparatus, an optical sensor element detects a laser beam from a laser emission element included in an optical pickup circuit and then sends the detected signal to a main circuit board. An APC circuit in the main circuit board outputs a control signal to control the laser output from the laser emission element at a constant level in accordance with the detected signal from the optical sensor element. A laser driver circuit included in the optical pickup circuit incorporates a transistor and a high-frequency wave superposition circuit). The transistor produces a drive current in accordance with the control signal from the APC circuit, while the high-frequency wave superposition circuit superposes a high-frequency current on the drive current. The drive current superposed with the high-frequency current drives the laser emission element.

    摘要翻译： 提供具有激光驱动器电路的光学拾取器，以克服由设置在驱动电流路径中的铁氧体磁珠或电容器引起的光学拾取器的尺寸的增加，以降低EMI噪声效应。 在光盘装置中，光传感器元件检测来自包括在光拾取电路中的激光发射元件的激光束，然后将检测到的信号发送到主电路板。 主电路板中的APC电路输出控制信号，以根据来自光学传感器元件的检测信号将激光发射元件的激光输出控制在恒定电平。 包括在光拾取电路中的激光驱动电路包括晶体管和高频波叠加电路）。 晶体管根据来自APC电路的控制信号产生驱动电流，而高频波叠加电路将高频电流叠加在驱动电流上。 与高频电流叠加的驱动电流驱动激光发射元件。

    Optical pick-up for selective playback and recording on a magneto-optically recorded medium
    98.
    发明授权
    Optical pick-up for selective playback and recording on a magneto-optically recorded medium 失效
    用于在磁光记录介质上进行选择性重放和记录的光学拾取器

    公开(公告)号：US5014253A

    公开(公告)日：1991-05-07

    申请号：US250777

    申请日：1988-09-28

    申请人： Yasuaki Morimoto ,  Friedheim Zucker ,  Christian Buchler

    发明人： Yasuaki Morimoto ,  Friedheim Zucker ,  Christian Buchler

    IPC分类号： G11B7/1263 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04

    CPC分类号： G11B7/1263 ,  G11B11/10515 ,  G11B11/10532 ,  G11B11/10576 ,  G11B11/10595 ,  G11B11/10597 ,  G11B13/04

    摘要： An optical pick-up for selective playback and recording on a magneto-optically recording medium, in which light is projected from a source onto the medium. The light is provided with a direction of a polarization, and is either reflected from the recording medium or is transmitted through the medium. The reflected or transmitted light becomes deflected onto a predetermined one of several photodetectors, depending on the direction of polarization of the light. The intensity of the reflected light or the transmitted light is held constant to minimize noise components that result from the optical properties of different recorded media as well as from the light. By holding the light intensity constant, moreover, precise readjustment to each of the different recording media that may be used, is not necessary.

    摘要翻译： 用于在磁光记录介质上进行选择性重放和记录的光学拾取器，其中光从源投影到介质上。 光被提供有偏振方向，并且被从记录介质反射或通过介质传输。 反射光或透射光根据光的偏振方向而偏转到几个光电检测器中的预定的一个上。 反射光或透射光的强度保持恒定，以使由不同记录介质以及光的光学特性产生的噪声分量最小化。 此外，通过保持光强度不变，对于可以使用的各种记录介质的精确重新调整是不必要的。