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1.发明授权公开(公告)号：US06674702B2
公开(公告)日：2004-01-06
申请号：US10270448
申请日：2002-10-15
申请人： Akihiro Asada , Hideo Ohnuki , Masaaki Kurebayashi , Yasuhito Tanaka , Toshimitsu Kaku , Takashi Hoshino , Hidehiko Kando
发明人： Akihiro Asada , Hideo Ohnuki , Masaaki Kurebayashi , Yasuhito Tanaka , Toshimitsu Kaku , Takashi Hoshino , Hidehiko Kando
IPC分类号： G11B7125
CPC分类号： G11B7/126 , G11B7/0062 , G11B2007/0006
摘要： A laser drive circuit includes a first current supply unit which supplies a first drive current to a first laser diode based on a drive waveform signal generated by a drive waveform generating unit, a second current supply unit which supplies a second drive current to a second laser diode based on the drive waveform signal generated by the drive waveform generating unit, and a switching unit which selectively supplies the drive waveform signal generated by the drive waveform generating unit to one of the first current supply unit and the second current supply unit. The drive waveform generating unit may be part of the laser drive circuit, or may be separate from the laser drive circuit, and may include a drive waveform information storage unit which stores a recording strategy according to a type of disk.
摘要翻译： 激光驱动电路包括：第一电流供应单元，其基于由驱动波形发生单元产生的驱动波形信号向第一激光二极管提供第一驱动电流;第二电流供应单元，其将第二驱动电流提供给第二激光器 基于由驱动波形生成单元生成的驱动波形信号的二极管，以及切换单元，其选择性地将驱动波形生成单元生成的驱动波形信号提供给第一电流供给单元和第二电流供给单元中的一个。 驱动波形生成单元可以是激光驱动电路的一部分，也可以与激光驱动电路分离，并且可以包括驱动波形信息存储单元，其存储根据盘的类型的记录策略。
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公开(公告)号：US06654328B2
公开(公告)日：2003-11-25
申请号：US10143933
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： A laser driver for driving a semiconductor laser for use in recording information by irradiating light on an information recording medium includes a device, including a PLL circuit, for obtaining (1) information modulated in accordance with a predetermined rule and (2) a clock signal, and outputting a recording current signal corresponding to a modulation signal representing the modulated information through the PLL circuit. The PLL circuit oscillates at a high frequency in synchronism with the clock signal. The laser driver further includes a PLL unlock detection circuit for detecting an oscillating condition of the PLL circuit, and for outputting a detection signal indicative of the oscillating condition of the PLL circuit outside the laser driver as a monitor signal.
摘要翻译： 用于驱动用于通过在信息记录介质上照射光来记录信息的半导体激光器的激光驱动器包括：包括PLL电路的装置，用于获得（1）根据预定规则调制的信息;以及（2）时钟信号 并且通过PLL电路输出与表示调制信息的调制信号相对应的记录电流信号。 PLL电路与时钟信号同步地以高频振荡。 激光驱动器还包括用于检测PLL电路的振荡状态的PLL解锁检测电路，并且用于将表示激光驱动器外部的PLL电路的振荡状态的检测信号作为监视信号输出。
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3.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：US06552987B1
公开(公告)日：2003-04-22
申请号：US09463007
申请日：2000-01-19
IPC分类号： G11B70045
CPC分类号： G11B7/0045 , G11B7/00456 , G11B7/005 , G11B7/00745 , G11B20/12
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 supply the clock signal during recording of data and stop the supply of the block signal during reproduction 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 基于通过柔性电缆和信号处理电路从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在记录数据期间提供时钟信号并停止 在再现数据期间提供块信号。
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4.发明申请Laser driver, optical disk apparatus using the same, and laser control method 失效激光驱动器，使用其的光盘装置，以及激光控制方法公开(公告)号：US20050030989A1
公开(公告)日：2005-02-10
申请号：US10937908
申请日：2004-09-09
申请人： Makoto Nihei , Toshimitsu Kaku , Akihiro Asada , Takashi Hoshino
发明人： Makoto Nihei , Toshimitsu Kaku , Akihiro Asada , Takashi Hoshino
IPC分类号： G11B7/125 , H01S5/062 , H01S5/0687 , H01S3/00 , H01S3/10
CPC分类号： G11B7/1263 , H01S5/0687
摘要： An optical disk apparatus uses a laser driver which can measure the frequency of the high-frequency superimposed current of the semiconductor laser simply and accurately. The apparatus includes a semiconductor laser which emits a laser beam onto the optical disk, a laser driver which drives the semiconductor laser with a current, with the high-frequency current being superimposed thereon, and measures the frequency of the high-frequency current, and a main controller which controls the frequency of the high-frequency current produced by the laser driver by using the frequency measured by the laser driver.
摘要翻译： 光盘装置使用能够简单且准确地测量半导体激光器的高频叠加电流的频率的激光驱动器。 该装置包括：将激光束发射到光盘上的半导体激光器，以高频电流叠加在一起驱动半导体激光器的激光驱动器，并测量高频电流的频率;以及 主控制器，其通过使用由激光驱动器测量的频率来控制由激光驱动器产生的高频电流的频率。
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公开(公告)号：US07499478B2
公开(公告)日：2009-03-03
申请号：US10937908
申请日：2004-09-09
申请人： Makoto Nihei , Toshimitsu Kaku , Akihiro Asada , Takashi Hoshino
发明人： Makoto Nihei , Toshimitsu Kaku , Akihiro Asada , Takashi Hoshino
IPC分类号： H01S3/13
CPC分类号： G11B7/1263 , H01S5/0687
摘要： An optical disk apparatus uses a laser driver which can measure the frequency of the high-frequency superimposed current of the semiconductor laser simply and accurately. The apparatus includes a semiconductor laser which emits a laser beam onto the optical disk, a laser driver which drives the semiconductor laser with a current, with the high-frequency current being superimposed thereon, and measures the frequency of the high-frequency current, and a main controller which controls the frequency of the high-frequency current produced by the laser driver by using the frequency measured by the laser driver.
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6.发明授权公开(公告)号：US06954410B2
公开(公告)日：2005-10-11
申请号：US10219224
申请日：2002-08-13
CPC分类号： G11B7/126 , G11B7/0045 , G11B7/005 , G11B7/00745 , G11B20/1403 , G11B27/3027
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： 在激光驱动波形发生器2中靠近激光器3提供激光波形发生功能。 记录时钟发生器9包括在激光驱动波形发生器2中，以产生频率高于同步时钟202的时钟。 这允许在不从调制器6传输高频信号的情况下产生记录激光电流（波形）。此外，由于同步时钟202在包括ID单元中的再现操作的再现操作时停止，所以对再现产生不期望的影响 可以减少诸如ID再现的操作。 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：US20050180280A1
公开(公告)日：2005-08-18
申请号：US11097774
申请日：2005-04-01
IPC分类号： G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/125 , G11B20/14 , G11B27/30 , G11B7/00 , G11B5/09
CPC分类号： G11B7/126 , G11B7/0045 , G11B7/005 , G11B7/00745 , G11B20/1403 , G11B27/3027
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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8.发明授权Laser driver, optical disk apparatus using the same, and laser control method 失效激光驱动器，使用其的光盘装置，以及激光控制方法公开(公告)号：US06810050B2
公开(公告)日：2004-10-26
申请号：US09943860
申请日：2001-08-30
申请人： Makoto Nihei , Toshimitsu Kaku , Akihiro Asada , Takashi Hoshino
发明人： Makoto Nihei , Toshimitsu Kaku , Akihiro Asada , Takashi Hoshino
IPC分类号： H01S313
CPC分类号： G11B7/1263 , H01S5/0687
摘要： An optical disk apparatus uses a laser driver which can measure the frequency of the high-frequency superimposed current of the semiconductor laser simply and accurately. The apparatus includes a semiconductor laser which emits a laser beam onto the optical disk, a laser driver which drives the semiconductor laser with a current, with the high-frequency current being superimposed thereon, and measures the frequency of the high-frequency current, and a main controller which controls the frequency of the high-frequency current produced by the laser driver by using the frequency measured by the laser driver.
摘要翻译： 光盘装置使用能够简单且准确地测量半导体激光器的高频叠加电流的频率的激光驱动器。 该装置包括：将激光束发射到光盘上的半导体激光器，以高频电流叠加在一起驱动半导体激光器的激光驱动器，并测量高频电流的频率;以及 主控制器，其通过使用由激光驱动器测量的频率来控制由激光驱动器产生的高频电流的频率。
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9.发明授权公开(公告)号：US06687208B2
公开(公告)日：2004-02-03
申请号：US10059188
申请日：2002-01-31
申请人： Akihiro Asada , Hideo Ohnuki , Masaaki Kurebayashi , Yasuhito Tanaka , Toshimitsu Kaku , Takashi Hoshino , Hidehiko Kando
发明人： Akihiro Asada , Hideo Ohnuki , Masaaki Kurebayashi , Yasuhito Tanaka , Toshimitsu Kaku , Takashi Hoshino , Hidehiko Kando
IPC分类号： G11B70045
CPC分类号： G11B7/126 , G11B7/0062 , G11B2007/0006
摘要： A laser drive integrated circuit and an optical disk apparatus using the laser drive integrated circuit for forming high-density marks. The optical disk apparatus includes a drive waveform information storage unit for storing at least one information of a drive waveform for driving a laser diode in response to a binary recording signal to be recorded in a recording medium, and a drive waveform decoder for decoding the drive waveform based on the information stored in the drive waveform information storage unit. A recording strategy can be changed in accordance with variations and fluctuations of recording media or characteristics of the recording media, while at the same time reducing a number of signal lines in flexible wiring and alleviating effects of signal distortion in the signal lines.
摘要翻译： 激光驱动集成电路和使用激光驱动集成电路形成高密度标记的光盘装置。 光盘装置包括驱动波形信息存储单元，用于响应于要记录在记录介质中的二进制记录信号，存储用于驱动激光二极管的驱动波形的至少一个信息;驱动波形解码器，用于对驱动器进行解码 基于存储在驱动波形信息存储单元中的信息的波形。 可以根据记录介质的变化和波动或记录介质的特性来改变记录策略，同时减少柔性布线中的多个信号线并减轻信号线中信号失真的影响。
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10.发明授权公开(公告)号：US06483791B1
公开(公告)日：2002-11-19
申请号：US09239516
申请日：1999-01-29
申请人： Akihiro Asada , Hideo Ohnuki , Masaaki Kurebayashi , Yasuhito Tanaka , Toshimitsu Kaku , Takashi Hoshino , Hidehiko Kando
发明人： Akihiro Asada , Hideo Ohnuki , Masaaki Kurebayashi , Yasuhito Tanaka , Toshimitsu Kaku , Takashi Hoshino , Hidehiko Kando
IPC分类号： G11B70045
CPC分类号： G11B7/126 , G11B7/0062 , G11B2007/0006
摘要： A laser drive integrated circuit and an optical disk apparatus using the laser drive integrated circuit for forming high-density marks. The optical disk apparatus has a drive waveform information storage unit for storing at least one information of the drive waveform for driving a laser diode in response to a binary recording signal recorded in a recording medium and a drive waveform decoder for decoding the drive waveform based on the information stored in the drive waveform information storage unit. The recording strategy can be changed in accordance with the variations and fluctuations of recording media or the characteristics of the recording media, while at the same time reducing the number of signal lines of flexible wiring and alleviating the effect of the signal distortion.
摘要翻译： 激光驱动集成电路和使用激光驱动集成电路形成高密度标记的光盘装置。 光盘装置具有驱动波形信息存储单元，用于响应于记录在记录介质中的二进制记录信号存储用于驱动激光二极管的驱动波形的至少一个信息，以及驱动波形解码器，用于基于 存储在驱动波形信息存储单元中的信息。 可以根据记录介质的变化和波动或记录介质的特性改变记录策略，同时减少柔性布线的信号线数量并减轻信号失真的影响。
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