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20 条记录 (耗时 0.013 秒)

    Objective lens mount and drive for optical disc player
    2.
    发明授权
    Objective lens mount and drive for optical disc player 失效
    物镜安装和驱动光盘播放器

    公开(公告)号：US4482988A

    公开(公告)日：1984-11-13

    申请号：US579800

    申请日：1984-02-17

    申请人： Katsuaki Tsurushima ,  Kenji Shintani

    发明人： Katsuaki Tsurushima ,  Kenji Shintani

    IPC分类号： G11B7/08 ,  G11B7/09 ,  G11B7/12

    CPC分类号： G11B7/093 ,  G11B7/08

    摘要： In an optical disc player or other apparatus in which a light beam is directed through an objective lens to be focused thereby at a record medium surface for optically reading information recorded in a track on such surface; the objective lens has its central axis offset in respect to the longitudinal axis of a cylindrical body forming part of a movable assembly and through which the light beam passes axially, and such cylindrical body is both angularly displaceable about its longitudinal axis and axially displaceable relative to a guide bearing forming part of a fixed assembly to correct for tracking errors and for focusing errors, respectively. The fixed assembly further includes a magnetic circuit generating a magnetic field which intersects coils included in the movable assembly to receive focusing error and tracking error signals, respectively.

    摘要翻译： 在光盘播放器或其他装置中，其中光束被引导通过物镜以被聚焦在记录介质表面上，用于光学地读取记录在该表面上的轨道中的信息; 物镜相对于形成可移动组件的一部分的圆柱形主体的纵向轴线具有其中心轴偏移，并且光束通过该中心轴线轴向偏移，并且该圆柱形主体可以围绕其纵向轴线成角度地移位并且可相对于 形成固定组件的一部分的导向轴承，以分别校正跟踪误差和聚焦误差。 固定组件还包括产生与包括在可移动组件中的线圈相交的磁场的磁路，以分别接收聚焦误差和跟踪误差信号。

    Muting circuit
    3.
    发明授权
    Muting circuit 失效
    静音电路

    公开(公告)号：US3992677A

    公开(公告)日：1976-11-16

    申请号：US570635

    申请日：1975-04-23

    申请人： Katsuaki Tsurushima

    发明人： Katsuaki Tsurushima

    IPC分类号： H03F1/00 ,  H01L21/331 ,  H01L29/73 ,  H03G3/34 ,  H03F1/26

    CPC分类号： H03G3/348

    摘要： A muting circuit which includes an amplifier having input and output terminals and a bi-directional transistor connectd between the output terminal and a circuit point of low reference potential. The transistor has emitter base and collector regions, the emitter region having a low impurity concentration substantially the same as that of the collector region and a potential barrier being provided opposite to the junction of the emitter and base regions at a distance which is smaller than the diffusion length of minority carriers of the base region. A control signal generating means including time constant means for turning on the bi-directional transistor is provided. The time constant means assures that the bi-directional transistor will be on for only a brief interval of time to bypass the output signal of the amplifier to the low reference potential circuit point and thereby avoid the presence of a pop noise at the speaker.

    摘要翻译： 一种静噪电路，包括具有输入和输出端的放大器和连接在输出端和低参考电位的电路点之间的双向晶体管。 晶体管具有发射极基极和集电极区域，发射极区域具有与集电极区域基本相同的低杂质浓度，并且势垒位于与发射极和基极区域的接合点相对的距离处，该距离小于 基区少数载体的扩散长度。 提供了包括用于接通双向晶体管的时间常数装置的控制信号发生装置。 时间常数意味着确保双向晶体管将仅短暂的时间间隔，以将放大器的输出信号旁路到低参考电位电路点，从而避免在扬声器处存在流行噪声。

    Optical disc player
    7.
    发明授权
    Optical disc player 失效
    光盘播放器

    公开(公告)号：US4519058A

    公开(公告)日：1985-05-21

    申请号：US413215

    申请日：1982-08-30

    申请人： Katsuaki Tsurushima ,  Tsuneo Furuya ,  Tadashi Fukami

    发明人： Katsuaki Tsurushima ,  Tsuneo Furuya ,  Tadashi Fukami

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B20/14 ,  G11B20/18 ,  G11B27/34 ,  G11B27/36 ,  H04N5/76

    CPC分类号： G11B7/005 ,  G11B20/14 ,  G11B20/1876 ,  G11B27/34 ,  G11B27/36

    摘要： An optical disc player comprises a rotating member for rotating the optical disc, an optical pickup member for reproducing a digital audio signal including an error correcting code such as the Reed-Solomon Code from the disc, an error correcting decoder for decoding the error correcting code so as to produce a corrected or interpolated digital audio signal and condition flag data indicating the correction of the digital audio signal, and a display for indicating the condition flag data as a stain or contamination condition of the disc.

    摘要翻译： 光盘播放器包括用于旋转光盘的旋转构件，用于从盘再现包括诸如Reed-Solomon码的纠错码的数字音频信号的光学拾取构件，用于对纠错码进行解码的纠错解码器 以产生校正或内插的数字音频信号和指示数字音频信号的校正的条件标志数据，以及用于指示条件标志数据作为盘的污点或污染状况的显示器。

    Optical disc recording and/or reproducing apparatus having a buffer memory to accommodate track jumps
    9.
    发明授权
    Optical disc recording and/or reproducing apparatus having a buffer memory to accommodate track jumps 失效
    具有缓冲存储器以容纳轨道跳跃的光盘记录和/或再现设备

    公开(公告)号：US5317553A

    公开(公告)日：1994-05-31

    申请号：US745486

    申请日：1991-08-15

    申请人： Norio Ohga ,  Katsuaki Tsurushima ,  Tadao Yoshida

    发明人： Norio Ohga ,  Katsuaki Tsurushima ,  Tadao Yoshida

    IPC分类号： G11B20/12 ,  G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B11/105 ,  G11B20/00 ,  G11B20/10 ,  G11B21/08 ,  G11B27/00 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/36

    CPC分类号： G11B20/10527 ,  G11B11/10502 ,  G11B11/10595 ,  G11B20/00007 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3063 ,  G11B27/36 ,  G11B7/004 ,  G11B7/0946 ,  G11B2020/10592 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/2525 ,  G11B2220/2545 ,  G11B27/3027

    摘要： A disc-shaped recording medium and a recording/reproducing apparatus employing the disc-shaped recording medium as a recording medium, are disclosed. The recording medium has a diameter of not more than 80 mm, and a recording track is formed on the recording medium with a track pitch of approximately 1.6 .mu.m. Information in excess of 130 Mbytes is recorded in a data compressed state on the recording track and the recording medium is rotationally driven at a constant linear velocity for recording and optically reproducing the information. The recording/reproducing apparatus employing the disc-shaped recording medium as a recording medium includes a buffer memory between a data compressing circuit for compressing input digital data and a recording encoding circuit for processing the compressed data by modulation suitable for recording, as long as a recording system of the apparatus is concerned, and a buffer memory between a playback decoding circuit for processing the compressed data by error correction decoding and demodulation complementary to the modulation and a data expansion circuit for expanding the compressed data to the original state. By suitably selecting the capacity of the buffer memories, recording and reproduction may continue satisfactorily even if the scanning position of the recording head and the optical head undergoes track jump during recording or reproduction.

    摘要翻译： 公开了一种盘形记录介质和采用盘形记录介质作为记录介质的记录/再现装置。 记录介质的直径不大于80mm，并且记录轨道形成在轨道间距大约为1.6μm的记录介质上。 在记录磁道上以数据压缩状态记录超过130M字节的信息，并且以恒定的线速旋转驱动记录介质以进行记录和光学再现信息。 采用盘形记录介质作为记录介质的记录/再现装置包括用于压缩输入数字数据的数据压缩电路和用于通过适于记录的调制来处理压缩数据的记录编码电路之间的缓冲存储器，只要 关于该装置的记录系统以及用于通过纠错解码和与调制互补的解调来处理压缩数据的重放解码电路之间的缓冲存储器和用于将压缩数据扩展到原始状态的数据扩展电路。 通过适当地选择缓冲存储器的容量，即使记录头和光头的扫描位置在记录或再现期间经历轨迹跳跃，记录和再现可以令人满意地继续。

    Objective lens assembly for optical disc player
    10.
    发明授权
    Objective lens assembly for optical disc player 失效
    用于光盘播放器的物镜组件

    公开(公告)号：US4473274A

    公开(公告)日：1984-09-25

    申请号：US388719

    申请日：1982-06-15

    申请人： Hajime Yano ,  Katsuaki Tsurushima

    发明人： Hajime Yano ,  Katsuaki Tsurushima

    IPC分类号： G11B7/08 ,  G11B7/09 ,  G02B7/04

    CPC分类号： G11B7/08 ,  G11B7/093 ,  G11B7/0932

    摘要： In an optical disc player or other apparatus in which a light beam is directed through an objective lens to be focused thereby at a record medium surface for optically reading information recorded in a track on such surface; the objective lens is mounted eccentrically in a circular end wall of a body member having a cylindrical side wall depending from the periphery of the end wall, a bearing sleeve extends axially from the center of the end wall and is slidable on a shaft extending upwardly from a base member so that the body member is both angularly displaceable about the shaft axis and axially displaceable relative to the base member to correct for tracking and focusing errors, respectively, inner and outer yokes extend upwardly from the base member at the inside and outside, respectively, of the cylindrical side wall and have respective radially aligned gaps, a magnet is associated with the yokes for generating magnetic flux through the side wall of the body member between the inner and outer yokes, and tracking and focusing coils are provided on the cylindrical side wall of the body member, with the tracking coils being shaped to have first and second portions extending parallel to the shaft axis and through which current will flow in opposed directions in response to the supplying of a tracking error signal to the tracking coils, with each first tracking coil portion being located between the inner and outer yokes to interact with the magnetic flux and thereby effect angular or rotary displacement of the body member in response to tracking error signals and each second tracking coil portion being located proximate to gaps of said inner and outer yokes so as to be substantially free of the magnetic flux, and with the path of a light beam through the objective lens being arranged to pass through a gap of the inner yoke and between the bearing sleeve and the cylindrical side wall of the body member.

    摘要翻译： 在光盘播放器或其他装置中，其中光束被引导通过物镜以被聚焦在记录介质表面上，用于光学地读取记录在该表面上的轨道中的信息; 物镜偏心地安装在主体部件的圆形端壁上，该圆形端壁具有从端壁的周边悬垂的圆柱形侧壁，轴承套筒从端壁的中心轴向延伸，并可在从 基座构件，使得主体构件能够围绕轴线成角度地移动并且相对于基座构件可轴向移动以分别校正跟踪和聚焦误差，内和外轭在内部和外部从基座构件向上延伸， 分别具有圆柱形侧壁并且具有相应的径向对准的间隙，磁体与用于产生通过内轭铁和外轭铁之间的本体构件的侧壁产生磁通的轭相关联，并且跟踪和聚焦线圈设置在圆柱形 所述跟踪线圈被成形为具有平行于所述轴线延伸的第一和第二部分 响应于向跟踪线圈提供跟踪误差信号，电流将以相反方向流动，其中每个第一跟踪线圈部分位于内轭铁和外轭铁之间以与磁通量相互作用，从而实现角位移或旋转位移 响应于跟踪误差信号，并且每个第二跟踪线圈部分位于所述内轭和外轭的间隙附近，以便基本上没有磁通，并且通过物镜的光束的路径 被布置成穿过内轭的间隙并且在轴承套和本体构件的圆柱形侧壁之间。