公开(公告)号：US20050157625A1

公开(公告)日：2005-07-21

申请号：US11033959

申请日：2005-01-13

申请人： Eisuke Ishibashi ,  Yasuhiro Wada ,  Shinya Shimizu ,  Toshiya Akagi

发明人： Eisuke Ishibashi ,  Yasuhiro Wada ,  Shinya Shimizu ,  Toshiya Akagi

IPC分类号： G11B7/0045 ,  G11B7/00 ,  G11B7/125

CPC分类号： G11B7/1263 ,  G11B7/00456

摘要： A ratio of an erase current and a peak current when starting recording is defined as K=iER/iPK (S1), and iER11 is set equal to K×iPK1, and an ideal value iER11 of an erase current that should be increased according to a temperature change is determined (S2). A value obtained by subtracting a current iBT at a bottom level emission intensity when starting recording from a current at an erase level emission intensity after the temperature rises is defined as iER1. By measuring this iER1, an ideal value iER11 of the erase current is subtracted from iER1, and the resultant current is defined as iBT11 (S3). This iBT11 is set as an adjustment value of the bottom current, and a value obtained by adding this adjustment value to a bottom current when starting recording is set as a bottom current after change.

摘要翻译： 开始记录时的擦除电流和峰值电流的比率被定义为K = iER / iPK（S 1），并且将iER11设置为等于KxiPK 1，并且将擦除电流的理想值iER 11设置为相应于 确定温度变化（S 2）。 通过从温度升高后的擦除电平发射强度的电流开始记录时减去以下电平发射强度的电流iBT而获得的值被定义为iER 1。 通过测量这个iER 1，从iER 1中减去擦除电流的理想值iER 11，结果电流定义为iBT 11（S 3）。 将该iBT11设定为底部电流的调整值，将开始记录时将该调整值与底部电流相加得到的值设定为变更后的底部电流。

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：USRE39952E1

公开(公告)日：2007-12-25

申请号：US11223909

申请日：1999-08-20

申请人： Chikashi Inokuchi ,  Shigeru Furumiya ,  Yoshiyuki Miyabata ,  Yuji Hisakado ,  Atsushi Miyazaki ,  Toshiya Akagi

发明人： Chikashi Inokuchi ,  Shigeru Furumiya ,  Yoshiyuki Miyabata ,  Yuji Hisakado ,  Atsushi Miyazaki ,  Toshiya Akagi

IPC分类号： G11B7/00

CPC分类号： G11B7/126 ,  G11B7/0045 ,  G11B7/0053 ,  G11B7/0055 ,  G11B7/0062 ,  G11B7/00718 ,  G11B7/1263

摘要： A power control device for controlling a power of a light source of an optical beam directed to an optical medium. The power control device includes a reflected light detector for detecting reflected light from the optical medium when irradiated by an optical beam which is following a track; an arithmetic unit for calculating from the reflected light a transmissivity of light transmitted from a disk surface to a recording layer or an amount of directed light on the recording layer of the medium; and power control means for controlling the power of the light source for emission based on a calculation result produced by the arithmetic unit.

摘要翻译： 一种用于控制指向光学介质的光束的光源的功率的功率控制装置。 功率控制装置包括反射光检测器，用于当由跟随轨道的光束照射时检测来自光学介质的反射光; 用于从反射光计算从盘表面传输到记录层的光的透射率或介质的记录层上的定向光量的运算单元; 以及功率控制装置，用于基于由运算单元产生的计算结果来控制用于发射的光源的功率。

公开(公告)号：USRE40240E1

公开(公告)日：2008-04-15

申请号：US11493013

申请日：2000-07-26

申请人： Toyoji Gushima ,  Toshiya Akagi ,  Chikashi Inokuchi

发明人： Toyoji Gushima ,  Toshiya Akagi ,  Chikashi Inokuchi

IPC分类号： G11B7/00

CPC分类号： G11B20/18 ,  G11B20/1883 ,  G11B20/1889 ,  G11B27/3027 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/2575

摘要： The sector synchronism of a timing generation section for generating data recording/reproducing timing is corrected at the address-mark detection timing of an address-mark detection section. Moreover, even if only one piece of address information having no error is not reproduced in the sector concerned, when at least one piece of address information having no error is reproduced in any of a predetermined number of sectors preceding the subject sector and at least one address mark is detected in the subject sector, the data recording/reproducing is permitted, and thus, the data is recorded/reproduced at a high speed and a high reliability even if an error rate of a physical address is deteriorated.

摘要翻译： 在地址标记检测部分的地址标记检测定时校正用于产生数据记录/再现定时的定时产生部分的扇区同步。 此外，即使只有一条没有错误的地址信息在相关的扇区中不再现，当至少一条没有错误的地址信息被再现在主题扇区之前的预定数量的扇区中的任一个中，并且至少一个 在主体扇区中检测到地址标记，允许数据记录/再现，因此，即使物理地址的错误率恶化，数据也以高速和高可靠性被记录/再现。

公开(公告)号：US06950378B1

公开(公告)日：2005-09-27

申请号：US10031972

申请日：1999-07-28

申请人： Atsushi Miyazaki ,  Hiroyuki Yamaguchi ,  Chikashi Inokuchi ,  Toshiya Akagi

发明人： Atsushi Miyazaki ,  Hiroyuki Yamaguchi ,  Chikashi Inokuchi ,  Toshiya Akagi

IPC分类号： G11B7/0045 ,  G11B7/125

CPC分类号： G11B7/126 ,  G11B7/0045

摘要： A laser power control method according to the present invention is a method for controlling an output power of a laser 3 which is used for recording information on a recording medium 1. The method comprises steps of: detecting emitted light of the laser by a first detection section 4; obtaining a first driving current of the laser by a first control section 8 based on an output of the first detection section; detecting reflected light or transmitted light from the recording medium by a second detection section 5; and obtaining a second driving current of the laser by a second control section 12 based on an output of the second detection section. The laser is driven based on the first driving current or the second driving current while the first control section and the second control section are operated alternately such that the second control section does not operate when the first control section is operating, and the first control section does not operate when the second control section is operating. With such a structure, even when a plurality of laser powers which are switched at a high speed are required for recording of information, each laser power can be controlled so as to be an appropriate power for recording of information.

摘要翻译： 根据本发明的激光功率控制方法是用于控制用于在记录介质1上记录信息的激光器3的输出功率的方法。 该方法包括以下步骤：通过第一检测部分4检测激光的发射光; 基于第一检测部的输出，通过第一控制部8获得激光的第一驱动电流; 通过第二检测部分5检测来自记录介质的反射光或透射光; 并且基于第二检测部的输出，通过第二控制部12获得激光的第二驱动电流。 激光器基于第一驱动电流或第二驱动电流被驱动，同时第一控制部分和第二控制部分交替地操作，使得第二控制部分在第一控制部分操作时不工作，并且第一控制部分 在第二控制部分运行时不工作。 通过这样的结构，即使为了记录信息而需要高速切换的多个激光功率，也可以控制各激光功率，使其成为用于记录信息的合适的电力。

公开(公告)号：US06930968B2

公开(公告)日：2005-08-16

申请号：US09811033

申请日：2001-03-16

申请人： Yuichi Kamioka ,  Toshiya Akagi ,  Yoshiyuki Miyabata ,  Yuichi Takahashi

发明人： Yuichi Kamioka ,  Toshiya Akagi ,  Yoshiyuki Miyabata ,  Yuichi Takahashi

IPC分类号： G11B7/0045 ,  G11B7/005 ,  H01S5/042 ,  H01S5/068 ,  G11B7/004

CPC分类号： H01S5/042 ,  G11B7/00454 ,  G11B7/005 ,  H01S5/0427 ,  H01S5/06817

摘要： A semiconductor laser driving apparatus for directing light to an optical disc for recording a recording mark based on a recording current and reproducing the recording mark to generate a reproduction signal. The apparatus includes a reproduction current generation section; a high frequency current generation section for generating a current including a high frequency component for reducing semiconductor laser noise in the reproduction; a recording current generation section, the recording current including a pulse corresponding to the recording mark and including a plurality of multi-pulses; and a current driving section for amplification. The apparatus further includes a filter to attenuate the enhanced high frequency components in the high frequency current and in the enhanced high frequency component; and a switching section for switching the filter so that the enhanced component in the recording current is superposed on at least one of the multi-pulses.

摘要翻译： 一种半导体激光器驱动装置，用于根据记录电流将光导向用于记录记录标记的光盘，并再现记录标记以产生再现信号。 该装置包括再现电流产生部分; 高频电流产生部分，用于产生包括用于在再现中降低半导体激光器噪声的高频分量的电流; 记录电流产生部分，所述记录电流包括与所述记录标记对应的脉冲并且包括多个多脉冲; 和用于放大的电流驱动部分。 该装置还包括滤波器，用于衰减高频电流和增强的高频分量中增强的高频分量; 以及切换部分，用于切换滤波器，使得记录电流中的增强分量叠加在多脉冲中的至少一个上。

公开(公告)号：US06621779B1

公开(公告)日：2003-09-16

申请号：US09763277

申请日：2001-05-11

申请人： Chikashi Inokuchi ,  Shigeru Furumiya ,  Yoshiyuki Miyabata ,  Yuji Hisakado ,  Atsushi Miyazaki ,  Toshiya Akagi

发明人： Chikashi Inokuchi ,  Shigeru Furumiya ,  Yoshiyuki Miyabata ,  Yuji Hisakado ,  Atsushi Miyazaki ,  Toshiya Akagi

IPC分类号： B11B700

CPC分类号： G11B7/126 ,  G11B7/0045 ,  G11B7/0053 ,  G11B7/0055 ,  G11B7/0062 ,  G11B7/00718 ,  G11B7/1263

摘要： A power control device for controlling a power of a light source of an optical beam directed to an optical medium. The power control device includes a reflected light detector for detecting reflected light from the optical medium when irradiated by an optical beam which is following a track; an arithmetic unit for calculating from the reflected light a transmissivity of light transmitted from a disk surface to a recording layer or an amount of directed light on the recording layer of the medium; and power control means for controlling the power of the light source for emission based on a calculation result produced by the arithmetic unit.

摘要翻译： 一种用于控制指向光学介质的光束的光源的功率的功率控制装置。 功率控制装置包括反射光检测器，用于当由跟随轨道的光束照射时检测来自光学介质的反射光; 用于从反射光计算从盘表面传输到记录层的光的透射率或介质的记录层上的定向光量的运算单元; 以及功率控制装置，用于基于由运算单元产生的计算结果来控制用于发射的光源的功率。

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：US07095696B2

公开(公告)日：2006-08-22

申请号：US10473307

申请日：2002-04-05

申请人： Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshiya Akagi ,  Shinichi Konishi

发明人： Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshiya Akagi ,  Shinichi Konishi

IPC分类号： G11B5/09

CPC分类号： G11B7/126 ,  G11B7/00 ,  G11B7/00456 ,  G11B7/006 ,  G11B20/10009 ,  G11B20/1426

摘要： A recording/producing device for writing data on a recording medium, or reading data from the recording medium, wherein data matching a recording pattern so specified as to include a plurality of mutually different sets of mark lengths and space lengths is written on the recording medium, and the data is then read to generate data signals. An edge shift detector uses data signals to measure the edge shift amount of a mark formed on a recording medium for each set of a mark length and a space length. A record controller sets a recording parameter for each set of a mark length and a space length based on the measured edge shift amount.

摘要翻译： 一种用于在记录介质上写入数据或从记录介质读取数据的记录/产生装置，其中将与指定为包括多个相互不同的多个标记长度和间隔长度的记录图案匹配的数据被写入记录介质 ，然后读取数据以产生数据信号。 边缘移位检测器使用数据信号来测量形成在记录介质上的每个标记长度和间隔长度的标记的边缘移位量。 记录控制器基于所测量的边缘偏移量为每组标记长度和空间长度设置记录参数。

公开(公告)号：US20050105434A1

公开(公告)日：2005-05-19

申请号：US10982829

申请日：2004-11-08

申请人： Katsuo Hori ,  Kenji Takauchi ,  Toshiya Akagi ,  Yasushi Ouchi

发明人： Katsuo Hori ,  Kenji Takauchi ,  Toshiya Akagi ,  Yasushi Ouchi

IPC分类号： G11B7/0045 ,  G11B5/09 ,  G11B7/00 ,  G11B7/125

CPC分类号： G11B7/1263 ,  G11B7/00456

摘要： A recording method for an optical disc drive and an optical disc drive capable of preventing a light source of a laser beam or a laser driving portion from becoming uncontrollable as they are heated to high temperatures above their compensation temperatures, and thereby enabling recording to be continued in a stable manner without being interrupted or stopped until it ends. A surrounding temperature is measured by a temperature sensor serving as temperature measuring device, a set surrounding temperature is correlated with a set recording rate by using a data table stored in an internal memory of a controller serving as correlating device, and a recording rate is changed by a digital signal processing portion serving as recording control device on the basis of the surrounding temperature measuring result and the correlating result, wherein the recording rate is changed by changing a ratio of a recording operation time and a recording-stop operation time with alternately repeating a recording operation and a recording-stop operation at as low a laser beam output as playback.

摘要翻译： 一种用于光盘驱动器和光盘驱动器的记录方法，其能够防止激光束或激光驱动部分的光源在被加热到高于其补偿温度的高温时变得不可控制，从而使得能够继续记录 以稳定的方式，不被中断或停止，直到它结束。 通过用作温度测量装置的温度传感器测量周围温度，通过使用存储在用作相关装置的控制器的内部存储器中的数据表将周围温度与设定的记录速率相关联，并且记录速率被改变 通过基于周围温度测量结果和相关结果用作记录控制装置的数字信号处理部分，其中通过改变记录操作时间和记录停止操作时间的比率来交替重复记录速率来改变记录速率 在重放时的激光束输出低的记录操作和记录停止操作。