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21. 发明授权

US06831885B2 Optical disk apparatus wherein recording clock signal is stopped being supplied to semiconductor laser drive circuit on optical pickup during reproduction operation 失效
标题翻译：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
申请人： Akihiro Asada , Toshimitsu Kaku , Takashi Hoshino , Masaaki Kurebayashi
发明人： Akihiro Asada , Toshimitsu Kaku , Takashi Hoshino , Masaaki Kurebayashi
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。

22. 发明授权

US06721261B2 Information recording/reproducing apparatus with laser driver 有权
标题翻译：具有激光驱动器的信息记录/再现装置
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。

23. 发明授权

US06636472B2 Laser drive unit and information recording/reproducing apparatus 失效
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.

24. 发明授权

US06487154B1 Laser drive unit and information recording/reproducing apparatus 有权
标题翻译：激光驱动单元和信息记录/再现装置
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。

25. 发明授权

US06442118B1 Information recording and reproducing apparatus having semiconductor laser drive circuitry in its pickup 失效
标题翻译：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
申请人： Takashi Hoshino , Toshimitsu Kaku , Akihiro Asada , Takehiko Sekine
发明人： Takashi Hoshino , Toshimitsu Kaku , Akihiro Asada , Takehiko Sekine
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）。

26. 发明授权

US06414932B1 Information recording/reproducing apparatus with laser driver 有权
标题翻译：具有激光驱动器的信息记录/再现装置
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。

27. 发明授权

US4866688A Composite tracking servo system for optical disc apparatus with track offset correction 失效
标题翻译：具有轨道偏移校正的光盘装置的复合跟踪伺服系统
公开(公告)号：US4866688A
公开(公告)日：1989-09-12
申请号：US942712
申请日：1986-12-17
申请人： Masatoshi Ohtake , Seiji Yonezawa , Toshiaki Tsuyoshi , Kazuo Ichino , Yukio Fukui , Takashi Takeuchi , Takeshi Maeda , Toshimitsu Kaku
发明人： Masatoshi Ohtake , Seiji Yonezawa , Toshiaki Tsuyoshi , Kazuo Ichino , Yukio Fukui , Takashi Takeuchi , Takeshi Maeda , Toshimitsu Kaku
IPC分类号： G11B7/007 , G11B7/09 , G11B7/095
CPC分类号： G11B7/0956 , G11B7/0901 , G11B7/0938 , G11B7/094 , G11B7/0953 , G11B7/00718 , G11B7/00745
摘要： A tracking servo system includes in addition to a composite servo system composed of a push-pull track deviation detecting loop operative with pregrooves formed in an optical disc and a wobbling track deviation detecting loop operative with intermittently provided wobbled tracking marks, an offset correcting loop for detecting offset component possibly produced due to tilt, deformation and eccentricity of a recording medium or change in optical and mechanical parameters in the course of time lapse to drive forcibly a light spot by applying an electrical offset to cancel out the offset component. In the offset correcting loop, light reflected by wobbled tracking marks provided intermittently or mirror areas formed by interrupting intermittently the pregroove is utilized for detecting the offset component.
摘要翻译：跟踪伺服系统除了包括与在光盘中形成的预槽相结合的推挽轨迹偏差检测回路和与间歇地提供的摆动跟踪标记一起工作的摆动轨迹偏差检测环路之外的复合伺服系统之外，检测由于记录介质的倾斜，变形和偏心可能产生的偏移分量或在时间过程中改变光学和机械参数，以通过施加电偏移来抵消偏移分量来驱动光斑。在偏移校正回路中，通过间歇地提供的摆动的跟踪标记反射的光或通过间歇地间歇地形成的反射镜区被用于检测偏移分量。

28. 发明授权

US4835756A Optical memory apparatus using an optical disc having guide-grooves of V-shape and predetermined optical depth and access method therefor 失效
标题翻译：使用具有V形导向槽和预定光学深度的光盘的光存储装置及其访问方法
公开(公告)号：US4835756A
公开(公告)日：1989-05-30
申请号：US32506
申请日：1987-03-31
申请人： Toshimitsu Kaku , Takeshi Maeda , Shigeru Nakamura , Masaru Ito , Kazuo Shigematsu , Yoshito Tsunoda
发明人： Toshimitsu Kaku , Takeshi Maeda , Shigeru Nakamura , Masaru Ito , Kazuo Shigematsu , Yoshito Tsunoda
IPC分类号： G11B7/00 , G11B7/005 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/24
CPC分类号： G11B7/0938 , G11B7/08505 , G11B7/24079 , G11B7/24076
摘要： An optical memory apparatus employs an optical disc having a plurality of guide-grooves in spiral and concentrical form and a plurality of flat tracks each arranged between adjacent two of the guide-grooves for recording information thereon, and the depth of the guide-grooves is suitably selected to increase the degree of modulation of a track cross signal, thereby performing a stable cross track counting by the use of the track cross signal and a tracking signal. One feature of the invention relies in that the modulation degree of the track cross signal is in the range between 30 and 60%. A second feature of the invention is that the guide-grooves are formed into a V shape and have an optical depth of .lambda./6 to .lambda./5 (.lambda. is the wavelength of the light used). In accordance with the invention, not ony a stable cross track counting is realized, but also the tracking signal is not practically varied with variations in the depth of the guide-grooves, thereby ensuring a highly accurate and stable tracking control.
摘要翻译：一种光存储装置采用具有多个螺旋形和同心形状的导向槽的光盘，以及多个平行轨道，每个平行轨迹布置在相邻的两个导槽之间，用于在其上记录信息，并且导向槽的深度为适当地选择以增加轨道交叉信号的调制度，从而通过使用轨道交叉信号和跟踪信号执行稳定的交叉轨道计数。本发明的一个特征在于，轨道交叉信号的调制度在30％与60％之间。本发明的第二个特征是导槽形成为V形，并且具有λ/ 6至λ/ 5的光学深度（λ是所用光的波长）。根据本发明，不能实现稳定的交叉轨道计数，而且跟踪信号实际上不随着导槽深度的变化而变化，从而确保高精度和稳定的跟踪控制。

29. 发明授权

US4730289A Magnetic-optical disc memory system and apparatus for switching header and data information 失效
标题翻译：用于切换标题和数据信息的磁光盘存储器系统和装置
公开(公告)号：US4730289A
公开(公告)日：1988-03-08
申请号：US818684
申请日：1986-01-14
申请人： Atsushi Saitoh , Toshimitsu Kaku
发明人： Atsushi Saitoh , Toshimitsu Kaku
IPC分类号： G11B11/10 , G11B7/00 , G11B7/004 , G11B7/26 , G11B11/105 , G11B13/04 , G11B27/10 , G11B27/30 , G11B11/00 , G11B15/087
CPC分类号： G11B27/30 , G11B11/10597 , G11B13/04 , G11B27/105 , G11B2020/10888 , G11B2220/2525
摘要： A magnetic-optical disc memory system wherein header information items which include sector marks indicating initial positions of sectors, track Nos., and sector Nos. are previously provided on a magnetic-optical disc in the form of embossed pits and wherein data information items are written in the form of magnetic signals in data areas other than the header areas. Photodetectors detect the header information and the data. The operation of switching outputs from the photodetectors is controlled in accordance with a timing based on the point of time at which a sector mark signal has been detected from the output of the photodetector which detects the header area.
摘要翻译：一种磁光盘存储器系统，其中包括指示扇区的初始位置，轨道编号和扇区编号的扇区标记的标题信息项预先以浮雕凹坑的形式提供在磁光盘上，并且其中数据信息项是在头部区域之外的数据区域中以磁信号的形式写入。光电检测器检测标题信息和数据。根据检测到标题区域的光检测器的输出检测到的扇区标记信号的时间点的时间点，控制来自光检测器的输出的切换操作。

30. 发明授权

US4656618A Optical information recording and reproducing apparatus 失效
标题翻译：光信息记录和再现装置
公开(公告)号：US4656618A
公开(公告)日：1987-04-07
申请号：US639004
申请日：1984-08-09
申请人： Toshimitsu Kaku , Keiji Kataoka , Yoshito Tsunoda , Kazuo Shigematsu
发明人： Toshimitsu Kaku , Keiji Kataoka , Yoshito Tsunoda , Kazuo Shigematsu
IPC分类号： G11B7/004 , G11B7/09 , G11B7/12 , G11B7/125 , G11B27/36
CPC分类号： G11B27/36 , G11B7/004 , G11B7/12 , G11B7/128 , G11B7/0909
摘要： In an optical information recording and reproducing apparatus having a laser light source and an optical system so that a beam from the laser light source is irradiated through the optical system on an information recording medium to record and reproduce information, an accousto-optic modulator is disposed in the optical system for receiving the beam from the laser light source, and a modulation unit is provided which comprises an oscillator for generating a plurality of signals at different frequencies, a modulator for modulating the outputs of the oscillator and an adder for adding together the outputs of the modulator.
摘要翻译：在具有激光光源和光学系统的光学信息记录和再现装置中，使得来自激光光源的光束通过光学系统照射在信息记录介质上以记录和再现信息，设置声光调制器在用于从激光光源接收光束的光学系统中，提供了一种调制单元，其包括用于产生不同频率的多个信号的振荡器，用于调制振荡器的输出的调制器和用于将调制器的输出。

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