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    Semiconductor laser control method and semiconductor laser control device
    3.
    发明授权
    Semiconductor laser control method and semiconductor laser control device 有权
    半导体激光控制方法和半导体激光控制装置

    公开(公告)号：US06728178B2

    公开(公告)日：2004-04-27

    申请号：US09983402

    申请日：2001-10-24

    申请人： Kenji Koishi ,  Yoshiyuki Miyabata ,  Makoto Usui ,  Kohjyu Konno ,  Yasuhiro Ueki ,  Tomonori Ueno ,  Yutaka Osada ,  Toru Fujimoto

    发明人： Kenji Koishi ,  Yoshiyuki Miyabata ,  Makoto Usui ,  Kohjyu Konno ,  Yasuhiro Ueki ,  Tomonori Ueno ,  Yutaka Osada ,  Toru Fujimoto

    IPC分类号： H01S310

    CPC分类号： G11B7/1263 ,  G11B7/1267

    摘要： Playback signal amplitude drops and continuity of the signal track amplitude is lost at the beginning the data recording area when data is incrementally written to optical discs such as DVD-R or DVD-RW media. Feed-forward control quickly settles semiconductor laser recording power to the target power level immediately after an incremental recording starts. While recording continues, feedback control maintains laser power at a desired recording power level even when the required current supply varies due to the temperature characteristics of the semiconductor laser when recording lasts for an extended period of time. A semiconductor laser control method and semiconductor laser control device thereby maintain laser power at a stable target recording power level quickly and for as long as recording continues.

    摘要翻译： 当数据被递增地写入诸如DVD-R或DVD-RW光盘的光盘时，数据记录区开始时，回放信号幅度下降和信号轨迹幅度的连续性丢失。 增量记录开始后，前馈控制可以快速将半导体激光记录功率稳定在目标功率水平。 在继续记录的同时，即使当所需的电流源由于半导体激光器的温度特性在长时间持续时的温度特性而变化时，反馈控制将激光功率维持在期望的记录功率水平。 半导体激光器控制方法和半导体激光器控制装置能够使激光功率保持在稳定的目标记录功率水平，并且只要持续进行记录。

    Terminal block
    6.
    外观设计
    Terminal block 有权
    接线端子

    公开(公告)号：USD714730S1

    公开(公告)日：2014-10-07

    申请号：US29418796

    申请日：2012-04-20

    申请人： Yutaka Osada

    设计人： Yutaka Osada

    Speed and position control apparatus for positioning a movable object
    7.
    发明授权
    Speed and position control apparatus for positioning a movable object 失效
    用于定位可移动物体的速度和位置控制装置

    公开(公告)号：US5291464A

    公开(公告)日：1994-03-01

    申请号：US903399

    申请日：1992-06-24

    申请人： Yutaka Osada

    发明人： Yutaka Osada

    IPC分类号： G05B19/23 ,  G11B7/085 ,  G11B21/08 ,  G11B17/22 ,  G11B7/00 ,  G11B33/02

    CPC分类号： G05B19/232 ,  G11B21/083 ,  G11B7/08529 ,  G11B7/08588

    摘要： A speed and position control apparatus comprising: an encoder generating two-phase signals having a 90-degree phase difference to correspond to a movement of a carrier; and adder obtaining a sum of phase signals; a subtracter obtaining a subtraction of phase signals; a circuit making bi-leveled signals from the sum and subtraction signals; a circuit obtaining an exclusive OR signal based on the bi-leveled signals; a circuit generating differential signals of respective phase signals; a first selector selecting either of the differential signals by the exclusive OR signal; a first switch selectively outputting an output of the first selector or its opposite-polarity output signal based on the bi-leveled subtraction signal; a second selector selecting either of the respective phase signals by the exclusive OR signal; a second switch selectively outputting an output of the second selector or its opposite-polarity output signal based on the bi-leveled subtraction signal; a device inputting an AC component of the second switch output signal to a sample and hold circuit; and a device returning an output of the sample and hold circuit, which holds a sample value inputted during a predetermined period of time in response to a building-up of the exclusive OR output signal, to its input terminal so as to realize a DC restoration.

    摘要翻译： 一种速度和位置控制装置，包括：编码器，产生具有90度相位差的两相信号，以对应于载体的移动; 和加法器获得相位信号之和; 减法器，获得相位信号的减法; 电路从和减信号中产生双电平信号; 基于所述双电平信号获得异或信号的电路; 产生各个相位信号的差分信号的电路; 第一选择器，通过异或信号选择差分信号中的任一个; 第一开关基于所述双电平减法信号选择性地输出所述第一选择器的输出或其反极性输出信号; 第二选择器，通过异或信号选择各个相位信号中的任一个; 第二开关基于所述双电平减法信号选择性地输出所述第二选择器的输出或其反极性输出信号; 将所述第二开关输出信号的AC分量输入到采样保持电路的装置; 以及将采样保持电路的输出返回到其输入端子的装置，其将保持在预定时间段期间输入的采样值作为异或输出信号的构成，从而实现DC恢复 。

    Recording/reproducing apparatus and method using accurate recording/reproducing clock signal
    9.
    发明授权
    Recording/reproducing apparatus and method using accurate recording/reproducing clock signal 有权
    使用精确的记录/再现时钟信号的记录/再现装置和方法

    公开(公告)号：US06700847B2

    公开(公告)日：2004-03-02

    申请号：US09895399

    申请日：2001-07-02

    申请人： Yutaka Osada

    发明人： Yutaka Osada

    IPC分类号： G11B7005

    CPC分类号： G11B27/24 ,  G11B20/1403 ,  G11B27/3027 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2562

    摘要： A period accumulating portion inputs a reference clock “Clock 2” and a wobbling pulse WBLPOL_I obtained by binarizing a wobbling signal extracted from a reproduction output from a DVD, and accumulates and counts reference clocks “Clock 2” in an interval of predetermined periods of the wobbling pulses WBLPOL_I so as to obtain a count value “m”. An average period detecting circuit obtains an average count value “n” corresponding to the interval of an averaged period of the wobbling pulse by dividing a count value of the reference clock “Clock 2” with a number of the predetermined periods. A divider generates a wobbling pulse WBLPOL_O having a constant period, deprived of a period fluctuation due to a prepit by dividing the reference clock based on the average count value. The phase of that generated wobbling pulse WBLPOL_O having the constant period is matched with the phase of a land prepit LPP by a LPPWindow generating circuit, a phase comparator, an AC phase shifter and a PLL circuit, and the wobbling pulse, whose phase is matched, is outputted as a recording/reproducing clock signal WTCLK.

    摘要翻译： 周期累加部分输入通过二值化从DVD的再现输出中提取的摆动信号获得的参考时钟“时钟2”和摆动脉冲WBLPOL_I，并且在该时钟累积部分的预定周期的间隔中累加和计数参考时钟“时钟2” 摆动脉冲WBLPOL_I，以获得计数值“m”。 平均周期检测电路通过将基准时钟“时钟2”的计数值除以预定周期的数量，获得与摆动脉冲的平均周期的间隔对应的平均值“n”。 分频器产生具有恒定周期的摆动脉冲WBLPOL_O，通过基于平均计数值划分参考时钟，不产生由于预凹坑引起的周期波动。 具有恒定周期的所产生的摆动脉冲WBLPOL_O的相位与LPPWindow产生电路，相位比较器，AC移相器和PLL电路的平面预制凹坑LPP的相位以及相位匹配的摆动脉冲相匹配 作为记录/再现时钟信号WTCLK输出。

    Terminal structure
    10.
    发明授权
    Terminal structure 失效
    码头结构

    公开(公告)号：US5993245A

    公开(公告)日：1999-11-30

    申请号：US884054

    申请日：1997-06-27

    申请人： Yutaka Osada

    发明人： Yutaka Osada

    IPC分类号： H01R4/48 ,  H01R9/22 ,  H01R4/24

    CPC分类号： H01R4/4836 ,  H01R4/4863

    摘要： A terminal structure is disclosed, wherein a metal plate is turnable at one end thereof with respect to a metal terminal, and a torsion coil spring 23 has one end normally pressing the metal plate so that the metal plate may be turned away from the metal terminal when the terminal structure is operated to insert an electrically conductive wire thereinto and so that the metal plate may be turned towards the metal terminal when a force is applied to the electrically conductive wire to pull out the same from the terminal structure, thereby to press the electrically conductive wire against the metal terminal with a stronger force of the torsion coil spring, thus securing the electric conduction between the metal terminal and the electrically conductive wire while allowing the electrically conductive wire to be connected and disconnected to and from the terminal structure with a light operating action.

    摘要翻译： 公开了一种端子结构，其中金属板在其一端相对于金属端子可转动，并且扭转螺旋弹簧23的一端通常按压金属板，使得金属板可以远离金属端子 当端子结构被操作以将导电线插入其中并且当向导电线施加力以将其从端子结构拉出时，金属板可以朝向金属端子转动，从而将 金属端子的导电线具有较强的扭力螺旋弹簧的力，从而确保金属端子和导电线之间的导电，同时允许导电线与端子结构连接和断开，并具有 轻操作动作。