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。

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。

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。

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。

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.

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。

公开(公告)号：US06552987B1

公开(公告)日：2003-04-22

申请号：US09463007

申请日：2000-01-19

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： G11B7/0045 ,  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。

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。

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。

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）。