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11.发明授权Optical disk apparatus wherein recording clock signal is stopped being supplied to semiconductor laser drive circuit on optical pickup during reproduction operation 失效记录时钟信号停止的光盘装置在再现操作期间被提供给光学拾取器上的半导体激光器驱动电路公开(公告)号：US06831885B2
公开(公告)日：2004-12-14
申请号：US10376631
申请日：2003-03-03
IPC分类号： G11B70045
CPC分类号： G11B7/126 , G11B7/0045 , G11B7/005
摘要： According to the present invention, in an optical disk apparatus constructed to supply signals for controlling a semiconductor laser drive circuit provided to an optical pickup from a signal processing circuit through a flexible cable, the semiconductor laser drive circuit is so constructed as to generate a drive current signal for the semiconductor laser on the basis of a binary signal and a clock signal which are supplied from the signal processing circuit through the flexible cable and the signal processing circuit is so constructed as to stop supplying the block signal to the semiconductor laser drive circuit through the flexible cable during reproduction of data, and to start supplying the clock signal to the semiconductor laser drive circuit before recording of data.
摘要翻译： 根据本发明，在通过柔性电缆从信号处理电路提供用于控制提供给光学拾取器的半导体激光器驱动电路的信号的光盘装置中，半导体激光器驱动电路被构造成产生驱动 基于从信号处理电路通过柔性电缆和信号处理电路提供的二进制信号和时钟信号的半导体激光器的电流信号被构造成停止向半导体激光器驱动电路提供块信号 在数据再现期间通过柔性电缆，并且在记录数据之前开始向半导体激光器驱动电路提供时钟信号。
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公开(公告)号：US06721261B2
公开(公告)日：2004-04-13
申请号：US10143932
申请日：2002-05-14
申请人： Toshimitsu Kaku , Akihiro Asada , Takashi Hoshino
发明人： Toshimitsu Kaku , Akihiro Asada , Takashi Hoshino
IPC分类号： G11B700
CPC分类号： G11B7/00456 , G11B7/126
摘要： An information recording/reproducing apparatus includes a semiconductor laser, a laser driver which drives the semiconductor laser, an optical system which focuses light emitted from the semiconductor laser on an information recording medium, a photodetector which detects light reflected from the information recording medium, and outputs a reflection light signal, a modulation circuit which modulates information in accordance with a predetermined rule, and outputs a binary signal representing the modulated information, and a calculation/control circuit which controls the modulation circuit. The laser driver includes a delay circuit, and receives the binary signal, generates a recording current signal corresponding to the binary signal through the delay circuit, and transmits an output of the delay circuit to the calculation/control circuit as a monitor signal. The calculation/control circuit generates a timing signal for sampling and holding the reflection light signal based on the monitor signal.
摘要翻译： 一种信息记录/再现装置，包括半导体激光器，驱动半导体激光器的激光驱动器，将从半导体激光器发射的光聚焦在信息记录介质上的光学系统，检测从信息记录介质反射的光的光电检测器，以及 输出反射光信号，根据预定规则调制信息的调制电路，并输出表示调制信息的二进制信号，以及控制调制电路的计算/控制电路。 激光驱动器包括延迟电路，并接收二进制信号，通过延迟电路产生对应于二进制信号的记录电流信号，并将延迟电路的输出作为监视信号发送到计算/控制电路。 计算/控制电路根据监视信号产生采样和保持反射光信号的定时信号。
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公开(公告)号：US06636472B2
公开(公告)日：2003-10-21
申请号：US10155626
申请日：2002-05-22
申请人： Masaaki Kurebayashi , Akihiro Asada , Toshimitsu Kaku , Hideo Oonuki , Takashi Hoshino , Hidehiko Kandou
发明人： Masaaki Kurebayashi , Akihiro Asada , Toshimitsu Kaku , Hideo Oonuki , Takashi Hoshino , Hidehiko Kandou
IPC分类号： G11B700
CPC分类号： G11B7/00456 , G11B7/1263
摘要： A laser drive (LD) unit 1 according to the present invention is provided with a laser drive waveform controller 6, into which information for setting the laser drive is entered from a controller 2, for generating a laser drive waveform on the basis of that information and supplying an indicated amperage; an LD current setting unit 7 for setting a laser drive current matching the indicated amperage; an LD current output unit 8 for varying the laser drive current on the basis of the laser drive waveform and supplying the current so varied to a laser diode 3; and a current setting corrector 9, into which a monitor signal obtained at the time of monitoring the laser beam emission from the laser diode 3 is monitored, for correcting the laser drive current set by the current setting unit 7 by using that monitor signal to adjust the power of the laser diode 3. The laser drive waveform controller 6, current setting unit 7, current output unit 8 and current setting corrector 9 are formed on the same substrate.
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公开(公告)号：US06487154B1
公开(公告)日：2002-11-26
申请号：US09490598
申请日：2000-01-25
申请人： Masaaki Kurebayashi , Akihiro Asada , Toshimitsu Kaku , Hideo Oonuki , Takashi Hoshino , Hidehiko Kandou
发明人： Masaaki Kurebayashi , Akihiro Asada , Toshimitsu Kaku , Hideo Oonuki , Takashi Hoshino , Hidehiko Kandou
IPC分类号： G11B555
CPC分类号： G11B7/00456 , G11B7/1263
摘要： A laser drive (LD) unit 1 according to the present invention is provided with a laser drive waveform controller 6, into which information for setting the laser drive is entered from a controller 2, for generating a laser drive waveform on the basis of that information and supplying an indicated amperage; an LD current setting unit 7 for setting a laser drive current matching the indicated amperage; an LD current output unit 8 for varying the laser drive current on the basis of the laser drive waveform and supplying the current so varied to a laser diode 3; and a current setting corrector 9, into which a monitor signal obtained at the time of monitoring the laser beam emission from the laser diode 3 is monitored, for correcting the laser drive current set by the current setting unit 7 by using that monitor signal to adjust the power of the laser diode 3. The laser drive waveform controller 6, current setting unit 7, current output unit 8 and current setting corrector 9 are formed on the same substrate.
摘要翻译： 根据本发明的激光驱动器（LD）单元1设置有激光驱动波形控制器6，激光驱动器的设置信息从控制器2进入其中，用于基于该信息产生激光驱动波形 并提供指示的安培数; LD电流设定单元7，用于设定与所示安培数匹配的激光驱动电流; LD电流输出单元8，用于根据激光驱动波形改变激光驱动电流，并向激光二极管3提供如此变化的电流; 以及电流设定校正器9，在监视从激光二极管3的激光束发射监视时获得的监视信号，用于通过使用该监视信号来调整由当前设定单元7设定的激光驱动电流来进行调整 激光二极管3的功率。激光驱动波形控制器6，电流设定单元7，电流输出单元8和电流设置校正器9形成在同一基板上。
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15.发明授权Information recording and reproducing apparatus having semiconductor laser drive circuitry in its pickup 失效在其拾取器中具有半导体激光驱动电路的信息记录和再现装置公开(公告)号：US06442118B1
公开(公告)日：2002-08-27
申请号：US09488156
申请日：2000-01-20
IPC分类号： G11B70045
CPC分类号： G11B7/126 , G11B7/0045 , G11B7/005 , G11B7/00745 , G11B20/1403 , G11B27/3027 , G11B2220/20
摘要： A laser waveform generation function is provided in a laser driving waveform generator 2 near a laser 3. A recording clock generator 9 is included in the laser driving waveform generator 2 to generate a clock with a frequency higher than that of a synchronizing clock 202. This allows a recording laser current (waveform) to be generated without transmission of a high frequency signal from the modulator 6. Further, because the synchronizing clock 202 is stopped upon a reproduction operation including reproduction operation in an ID unit, undesired effects on a reproduction operation such as ID reproduction can be reduced. Because the response speed of the recording clock generator 9 can be changed, a high precision clock can be generated. Thus, a high-precision recording laser current (waveform) can be generated.
摘要翻译： 在激光器3附近的激光驱动波形发生器2中提供激光波形生成功能。激光驱动波形发生器2中包括记录时钟发生器9，以产生频率高于同步时钟202的时钟。 允许在不从调制器6传输高频信号的情况下产生记录激光电流（波形）。此外，由于在包括ID单元中的再现操作的再现操作中停止同步时钟202，所以对再现操作产生不期望的影响 例如ID再现可以减少。 由于可以改变记录时钟发生器9的响应速度，所以可以产生高精度时钟。 因此，可以产生高精度的记录激光电流（波形）。
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公开(公告)号：US06414932B1
公开(公告)日：2002-07-02
申请号：US09392620
申请日：1999-09-09
申请人： Toshimitsu Kaku , Akihiro Asada , Takashi Hoshino
发明人： Toshimitsu Kaku , Akihiro Asada , Takashi Hoshino
IPC分类号： G11B700
CPC分类号： G11B7/00456 , G11B7/126
摘要： An information recording/reproducing apparatus which can record and reproduce information data into and from various kinds of recording mediums has a laser driver which enables recording strategy control for each kind of recording medium. The laser driver receives an NRZ binary signal and a clock signal synchronized with the NRZ binary signal from a modulation circuit, and generates a recording current signal corresponding to the NRZ binary signal. The laser driver includes a PLL circuit disposed in the laser driver which oscillates at a recording frequency, and an unlock detection circuit which detects an oscillating condition of the PLL circuit and outputs a detection signal indicative of the oscillating condition of the PLL. A recording operation of the information recording/reproducing apparatus is controlled based on the detection signal outputted from the unlock detection circuit.
摘要翻译： 可以将信息数据记录到各种记录介质中并从各种记录介质再现信息数据的信息记录/再现装置具有能够对各种记录介质进行记录策略控制的激光驱动器。 激光驱动器从调制电路接收与NRZ二进制信号同步的NRZ二进制信号和时钟信号，并产生对应于NRZ二进制信号的记录电流信号。 激光驱动器包括设置在以记录频率振荡的激光驱动器中的PLL电路，以及检测PLL电路的振荡状态并输出表示PLL的振荡条件的检测信号的解锁检测电路。 基于从解锁检测电路输出的检测信号来控制信息记录/再现装置的记录操作。
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公开(公告)号：US08807265B2
公开(公告)日：2014-08-19
申请号：US13606253
申请日：2012-09-07
IPC分类号： B62D1/19
摘要： A tractor includes: a driver's compartment; an engine compartment; a partitioning member that partitions the driver's compartment and engine compartment and has a through-hole; a steering wheel provided in the driver's compartment; a power steering unit disposed on the engine compartment side; a steering shaft that extends from the steering wheel and is connected to the power steering unit; an elastic sealing member provided in an inner circumferential portion of the through-hole; and an anti-vibration member. The elastic sealing member includes a supported portion supported to the inner circumferential portion and a ring-shaped lip portion protruding downward from one end of the supported portion. The power steering unit is mounted to the partitioning member via the anti-vibration member, the ring-shaped lip portion is elastically clamped to the upper face of the power steering unit, and the steering shaft is connected to the power steering unit while inserted in the through-hole.
摘要翻译： 拖拉机包括：驾驶室; 发动机舱; 分隔构件，其分隔驾驶室和发动机舱并具有通孔; 设在驾驶室内的方向盘; 设置在发动机舱侧的动力转向单元; 转向轴，其从方向盘延伸并连接到动力转向单元; 设置在通孔的内周部的弹性密封部件; 和防振部件。 弹性密封构件包括支撑在内周部上的支撑部分和从支撑部分的一端向下突出的环形唇部。 动力转向单元通过防振构件安装在分隔构件上，环形唇部被弹性夹紧到动力转向装置的上表面，转向轴在动力转向装置插入时连接到动力转向装置 通孔。
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公开(公告)号：US07570564B2
公开(公告)日：2009-08-04
申请号：US11976663
申请日：2007-10-26
申请人： Akihiro Asada , Masaaki Kurebayashi
发明人： Akihiro Asada , Masaaki Kurebayashi
IPC分类号： G11B7/0045
CPC分类号： G11B7/0062 , G11B7/00456 , G11B7/126 , G11B7/1263 , G11B20/1217 , G11B2007/0006 , G11B2020/1298
摘要： An optical disk drive includes drive current generation unit for supplying a mark forming semiconductor laser drive current and a space forming semiconductor laser drive current; first high-frequency superimposition unit for superimposing a high-frequency component on the space forming semiconductor laser drive current; and high-frequency superimposition control unit for controlling the first high-frequency superimposition unit to stop the superimposition of the high-frequency component for a predetermined duration prior to a timing at which to switch from the space forming semiconductor laser drive current to the mark forming semiconductor laser drive current, eliminating positional variations on the disk of the mark leading and trailing edges due to the high frequency superimposition.
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公开(公告)号：US07492686B2
公开(公告)日：2009-02-17
申请号：US11233193
申请日：2005-09-22
IPC分类号： G11B5/09
CPC分类号： G11B7/00456 , G11B2007/0006
摘要： Embodiments of the present invention relate to systems and methods for providing flexible multipulse strategies. In specific embodiments, a plurality of multipulse location registers are dedicated to storing multipulse location information. Each of a plurality of different mark-lengths that can result in at least one multipulse is mapped to one or more bit location within the multipulse location registers, such that a unique multipulse execution strategy can be defined for each of the plurality of different mark-lengths. Each bit location within the multipulse location registers can contain a first type of bit or a second type of bit. The first type of bit is used to indicate where to execute a multipulse, and the second type of bit is used to indicate where to not execute a multipulse. This abstract is not intended to be a complete description of the various embodiments of the present invention.
摘要翻译： 本发明的实施例涉及用于提供灵活多脉冲策略的系统和方法。 在具体实施例中，多个多脉冲位置寄存器专用于存储多脉冲位置信息。 可以导致至少一个多脉冲的多个不同的标记长度中的每一个被映射到多脉冲位置寄存器内的一个或多个比特位置，使得可以为多个不同的标记位中的每一个定义唯一的多脉冲执行策略， 长度 多脉冲位置寄存器中的每个位位置可以包含第一类型的位或第二类型的位。 第一种类型的位用于指示执行多脉冲的位置，第二种类型的位用于指示不执行多脉冲的位置。 该摘要并不是对本发明的各种实施例的完整描述。
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公开(公告)号：US20080056090A1
公开(公告)日：2008-03-06
申请号：US11976670
申请日：2007-10-26
申请人： Akihiro Asada , Masaaki Kurebayashi
发明人： Akihiro Asada , Masaaki Kurebayashi
IPC分类号： G11B7/0045
CPC分类号： G11B7/0062 , G11B7/00456 , G11B7/126 , G11B7/1263 , G11B20/1217 , G11B2007/0006 , G11B2020/1298
摘要： An optical disk drive includes drive current generation unit for supplying a mark forming semiconductor laser drive current and a space forming semiconductor laser drive current; first high-frequency superimposition unit for superimposing a high-frequency component on the space forming semiconductor laser drive current; and high-frequency superimposition control unit for controlling the first high-frequency superimposition unit to stop the superimposition of the high-frequency component for a predetermined duration prior to a timing at which to switch from the space forming semiconductor laser drive current to the mark forming semiconductor laser drive current, eliminating positional variations on the disk of the mark leading and trailing edges due to the high frequency superimposition.
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