公开(公告)号：US06434098B1

公开(公告)日：2002-08-13

申请号：US09840874

申请日：2001-04-25

申请人： Shinichi Konishi ,  Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshihiko Takahashi ,  Toshiya Akagi ,  Yuji Hisakado ,  Yukihiro Yamasaki

发明人： Shinichi Konishi ,  Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshihiko Takahashi ,  Toshiya Akagi ,  Yuji Hisakado ,  Yukihiro Yamasaki

IPC分类号： G11B700

摘要： An optical disc drive usable with discs to which data is continuously recorded and discs having a sector format can quickly resume playback signal output after passing imperfection causing potential reading errors, and plays disc with few read errors. A detection signal generator detects DC level fluctuation in the playback signal read from the disc and generates a detection signal tracking the DC level fluctuation. A selector selects a detection signal or a null signal without valid polarity based on the detection signal generated by the detection signal generator and input to the selector. A clamping unit performs a clamping process to suppress DC level fluctuation in the playback signal based on the detection signal when the selection unit selects the detection signal, and does not perform the clamping process when the selection unit selects the null signal. A signal processor performs specific signal processes based on clamping unit output.

公开(公告)号：USRE39306E1

公开(公告)日：2006-09-26

申请号：US10785863

申请日：2004-02-25

申请人： Shinichi Konishi ,  Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshihiko Takahashi ,  Toshiya Akagi ,  Yuji Hisakado ,  Yukihiro Yamasaki

发明人： Shinichi Konishi ,  Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshihiko Takahashi ,  Toshiya Akagi ,  Yuji Hisakado ,  Yukihiro Yamasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/00375 ,  G11B7/005 ,  G11B20/10527

摘要： An optical disc drive usable with discs to which data is continuously recorded and discs having a sector format can quickly resume playback signal output after passing imperfection causing potential reading errors, and plays disc with few read errors. A detection signal generator detects DC level fluctuation in the playback signal read from the disc and generates a detection signal tracking the DC level fluctuation. A selector selects a detection signal or a null signal without valid polarity based on the detection signal generated by the detection signal generator and input to the selector. A clamping unit performs a clamping process to suppress DC level fluctuation in the playback signal based on the detection signal when the selection unit selects the detection signal, and does not perform the clamping process when the selection unit selects the null signal. A signal processor performs specific signal processes based on clamping unit output.

公开(公告)号：US07239586B2

公开(公告)日：2007-07-03

申请号：US10333632

申请日：2001-07-27

申请人： Mamoru Shoji ,  Toshiya Akagi ,  Atsushi Nakamura ,  Ariaki Ito ,  Yukihiro Yamasaki ,  Yasuhiro Honda ,  Takashi Ishida ,  Shinichi Konishi ,  Yuji Hisakado

发明人： Mamoru Shoji ,  Toshiya Akagi ,  Atsushi Nakamura ,  Ariaki Ito ,  Yukihiro Yamasaki ,  Yasuhiro Honda ,  Takashi Ishida ,  Shinichi Konishi ,  Yuji Hisakado

IPC分类号： G11B5/00

CPC分类号： G11B7/126 ,  G11B7/0045 ,  G11B7/00718 ,  G11B20/10009 ,  G11B20/1816 ,  G11B20/1879

摘要： An optical disk drive and recording power determination method determine the optimum power with consideration for the recording state of a base layer track when determining the optimum power by test recording before recording user data. After recording at a second recording power that is higher than a first recording power by a specific amount, recording is performed at a third recording power that is lower than the first recording power by a specific amount, and the first recording power is set to the recording power for data recording when a specified playback signal quality is achieved.

摘要翻译： 光盘驱动器和记录功率确定方法在记录用户数据之前通过测试记录确定最佳功率时，考虑到基层轨道的记录状态来确定最佳功率。 在比第一记录功率高达特定量的第二记录功率下记录之后，以低于第一记录功率的特定量的第三记录功率进行记录，并且将第一记录功率设置为 当达到指定的播放信号质量时，记录数据记录功率。

公开(公告)号：US06236629B1

公开(公告)日：2001-05-22

申请号：US09694016

申请日：2000-10-23

申请人： Yuji Hisakado ,  Toshiya Akagi ,  Yukihiro Yamasaki

发明人： Yuji Hisakado ,  Toshiya Akagi ,  Yukihiro Yamasaki

IPC分类号： G11B700

CPC分类号： G11B7/004 ,  G11B7/007 ,  G11B20/1403 ,  G11B27/19 ,  G11B27/3027 ,  G11B2220/20

摘要： An optical disk is operated in a ZCLV system for generating a stable and precise clock and the operation proceeds with a speed change of a high-speed motor when data is stored with the motor accelerated or decelerated at a high speed to improve accessibility for data storage. The optical disk includes: a disk rotator for rotating the optical disk at an optional number of rotations; a rotation controller for controlling rotation of the optical disk; a wobble extractor for extracting wobbling on the track of the optical disk; a clock extractor for extracting a clock element from the wobbling; a speed detector for detecting a linear speed of the optical disk; and a response switch for switching a response of the clock extractor, in which the response of the clock extractor is switched depending on the linear speed of the optical disk.

摘要翻译： 光盘在ZCLV系统中操作，用于产生稳定和精确的时钟，并且随着电机以高速加速或减速的数据存储数据时，操作将随着高速电机的速度变化而进行，以提高数据存储的可访问性 。 光盘包括：盘旋转器，用于以可选的转数旋转光盘; 旋转控制器，用于控制光盘的旋转; 用于提取光盘轨道上的摆动的摆动提取器; 时钟提取器，用于从摆动中提取时钟元件; 用于检测光盘的线速度的速度检测器; 以及用于切换时钟提取器的响应的响应开关，其中时钟提取器的响应根据光盘的线速度而切换。

公开(公告)号：US06205095B1

公开(公告)日：2001-03-20

申请号：US09210807

申请日：1998-12-15

申请人： Yuji Hisakado ,  Chikashi Inokuchi ,  Yukihiro Yamasaki

发明人： Yuji Hisakado ,  Chikashi Inokuchi ,  Yukihiro Yamasaki

IPC分类号： G11B700

CPC分类号： G11B20/1403 ,  G11B7/0037 ,  G11B7/005 ,  G11B20/10009

摘要： A regenerated signal process circuit of an optical disk device is developed to solve the problem that a jitter margin is lowered without an optimum regeneration condition because, when data is regenerated independent of a transfer rate, a data frequency fluctuates against a set value of an AGC, a waveform equalization circuit, a binarization circuit, or the like. In a signal process circuit, a set value of the AGC (104), the waveform equalization circuit (105), the binarization circuit (106), or the like is controlled by referring to the amount of oscillation control current of the VCO (1002) of a frequency synthesizer. The characteristics of the VCO of the data PLL (1001) is set equal to the characteristics of the VCO (1002) of the frequency synthesizer, and each set value is controlled by referring to the oscillation control current of each VCO. Then, the reference current is switched depending on the synchronization state of the data PLL (1001). In addition, the gain of the charge pump (114) is adjusted based on the division ratio of the N divider (111) such that the frequency synthesizer has loop characteristics of constant and stable oscillation.

摘要翻译： 开发了光盘装置的再生信号处理电路，以解决抖动余量降低而没有最佳再生条件的问题，因为当独立于传送速率重新生成数据时，数据频率与AGC的设定值相反 ，波形均衡电路，二值化电路等。 在信号处理电路中，通过参考VCO（1002）的振荡控制电流的量来控制AGC（104），波形均衡电路（105），二值化电路（106）等的设定值 ）频率合成器。 将数据PLL（1001）的VCO的特性设置为等于频率合成器的VCO（1002）的特性，并且通过参考每个VCO的振荡控制电流来控制每个设定值。 然后，根据数据PLL（1001）的同步状态切换参考电流。 此外，基于N分频器（111）的分频比来调整电荷泵（114）的增益，使得频率合成器具有恒定和稳定振荡的环路特性。

公开(公告)号：US06172952B2

公开(公告)日：2001-01-09

申请号：US09095212

申请日：1998-06-10

申请人： Chikashi Inokuchi ,  Yukihiro Yamasaki ,  Yuji Hisakado ,  Jun'ichi Minamino ,  Shigeru Furumiya

发明人： Chikashi Inokuchi ,  Yukihiro Yamasaki ,  Yuji Hisakado ,  Jun'ichi Minamino ,  Shigeru Furumiya

IPC分类号： G11B509

CPC分类号： G11B27/24 ,  G11B7/0045 ,  G11B7/0053 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/0946 ,  G11B20/1403 ,  G11B20/18 ,  G11B27/3027 ,  G11B2220/216 ,  G11B2220/2575

摘要： An optical disk device of the present invention performs at least one of recording and reproduction of an optical disk in which a wobble signal is included along a data-recording track, by rotating the optical disk and by scanning the track on the optical disk using an optical head. The device includes: an extraction section for extracting the wobble signal of the optical disk from an output of the optical head; a synchronization clock generation section for generating a synchronization clock signal based on the wobble signal extracted by the extraction section; and a recording/reproduction section for performing at least one of recording and reproduction of data to/from the optical disk by the synchronization clock signal generated by the synchronization clock generation section.

摘要翻译： 本发明的光盘装置通过旋转光盘并通过使用光盘扫描光盘来执行其中沿着数据记录轨道包括摆动信号的光盘的记录和再现中的至少一个 光头。 该装置包括：提取部分，用于从光头的输出中提取光盘的摆动信号; 同步时钟产生部分，用于基于由提取部分提取的摆动信号产生同步时钟信号; 以及记录/再现部分，用于通过由同步时钟产生部分产生的同步时钟信号来执行数据到/从光盘的记录和再现中的至少一个。

公开(公告)号：US06614735B2

公开(公告)日：2003-09-02

申请号：US09814073

申请日：2001-03-22

申请人： Mamoru Shoji ,  Ariaki Ito ,  Takashi Ishida ,  Yukihiro Yamasaki ,  Toshiya Akagi

发明人： Mamoru Shoji ,  Ariaki Ito ,  Takashi Ishida ,  Yukihiro Yamasaki ,  Toshiya Akagi

IPC分类号： G11B7125

CPC分类号： G11B7/126 ,  G11B7/00375 ,  G11B7/00718 ,  G11B27/36 ,  G11B2220/20

摘要： The invention provides an optical disc device and a method of determining an optimal laser power for data recording by trial recording before recording actual user data even when there are fingerprints in the test track area for the trial recording. The BER (Byte Error Rate) is detected in each recorded sector. If the BER is less than a particular threshold value, the sector is taken as OK (good). Otherwise the sector is taken as NG (no good). While the peak power level is gradually changed or decreased from the power level at which half or more of the plural reproduced sectors are OK, a boundary peak power at which half or more of the sectors become NG is found. Based on the found boundary power, an amount of the optimal peak power is determined.

摘要翻译： 本发明提供了一种光盘装置和方法，即使在用于试验记录的测试轨迹区域中存在指纹时，也可以在记录实际用户数据之前通过试验记录确定用于数据记录的最佳激光功率。 在每个记录扇区中检测到BER（字节错误率）。 如果BER小于特定阈值，则扇区被视为OK（良好）。 否则，该部门被视为NG（不好）。 当峰值功率电平从多个再现扇区的一半以上的功率电平逐渐变化或减小时，发现半个以上的扇区变为NG的边界峰值功率。 基于找到的边界功率，确定最佳峰值功率的量。

公开(公告)号：US5999506A

公开(公告)日：1999-12-07

申请号：US912705

申请日：1997-08-18

申请人： Mamoru Shoji ,  Yukihiro Yamasaki ,  Chikashi Inokuchi

发明人： Mamoru Shoji ,  Yukihiro Yamasaki ,  Chikashi Inokuchi

IPC分类号： G11B5/00 ,  G11B7/005 ,  G11B19/04 ,  G11B20/10 ,  G11B20/18 ,  G11B7/00

CPC分类号： G11B19/04 ,  G11B20/10009 ,  G11B20/18 ,  G11B7/005 ,  G11B2005/001

摘要： The data recording/reproducing device according to the present invention, in response to the detected signal output from the data error detector, repeats a reading operation to form a data from a reproduced signal. The gate signal generator includes an envelope detector and a comparator. The envelope detector has a time constant which is changed in accordance with the detected signal output from the data error detector, and forms a threshold signal that generally follows a level variation of the reproduced signal in accordance with the time constant. The comparator compares the reproduced signal and the threshold signal output from the envelope detector so as to form the gate signal.

摘要翻译： 根据本发明的数据记录/再现装置响应于从数据错误检测器输出的检测信号重复读取操作以从再生信号形成数据。 门信号发生器包括一个包络检测器和一个比较器。 包络检测器具有根据从数据误差检测器输出的检测信号而改变的时间常数，并且根据时间常数形成通常跟随再现信号的电平变化的阈值信号。 比较器比较再生信号和从包络检测器输出的阈值信号，形成门信号。

公开(公告)号：US08358139B2

公开(公告)日：2013-01-22

申请号：US12748502

申请日：2010-03-29

申请人： Ji-seon Baek ,  Yukihiro Yamasaki

发明人： Ji-seon Baek ,  Yukihiro Yamasaki

IPC分类号： G01R31/08

CPC分类号： G11B7/22

摘要： An optical reproducing apparatus connectable to optical pickups and a method of controlling an optical pickup thereof are provided. The optical reproducing apparatus measures resistance of an optical pickup on a port of a connection unit to which the optical pickup is connected, and determines the type of the optical pickup according to the measured resistance. Accordingly, optical reproducing apparatuses may be controlled according to the type of optical pickups, and manufactured using various optical pickups without checking the type of optical pickups, which allows convenient manufacturing of optical reproducing apparatuses.

摘要翻译： 提供了可连接到光学拾取器的光学再现装置和控制其光学拾取器的方法。 光学重放装置测量光学拾取器连接到的连接单元的端口上的光学拾取器的电阻，并且根据测量的电阻确定光学拾取器的类型。 因此，可以根据光学拾取器的类型来控制光学再现装置，并且使用各种光学拾取器制造而不检查光学拾取器的类型，这允许方便地制造光学再现装置。

公开(公告)号：US5151893A

公开(公告)日：1992-09-29

申请号：US530795

申请日：1990-05-30

申请人： Yukihiro Yamasaki ,  Toshio Suetsugu ,  Tamotsu Matsuo ,  Hideo Okamura

发明人： Yukihiro Yamasaki ,  Toshio Suetsugu ,  Tamotsu Matsuo ,  Hideo Okamura

IPC分类号： G11B7/125

CPC分类号： G11B7/126

摘要： In an optical data recording and reproducing apparatus comprising an information signal generator, a sample/hold switching signal generator, a write/read switching signal generator, a laser beam source, a reference voltage generator, a comparator and a photo detector, a dummy signal is added to the information signal modulating the laser beam or generation of the laser beam is forcedly stopped after a data write servo mode so as to prevent generation of the laser beam of an excessively high level at the time of change-over from the data write servo mode to a data write hold mode or from the data write hold mode to a data read mode, or the level of the write/read switching signal is changed before the level of the sample/hold switching signal is changed at the time of change-over from the data write hold mode to the data read mode, or the duration of emission of the laser beam is extended slightly before the level of the sample/hold switching signal is changed.