公开(公告)号：US07636285B2

公开(公告)日：2009-12-22

申请号：US11594183

申请日：2006-11-08

申请人： Kazunori Tokiwa

发明人： Kazunori Tokiwa

IPC分类号： G11B7/00

CPC分类号： G11B7/268 ,  G11B7/00375 ,  G11B20/1816 ,  G11B2007/0013 ,  G11B2220/215 ,  G11B2220/237 ,  G11B2220/2562

摘要： Reflected light caused by reflection of a laser beam at a first layer of an optical disc is converted into a main signal. Reflected light caused by reflection of the laser beam at a second layer of the optical disc is converted into a sub signal. An address of a currently-accessed position in the first layer is detected from the main signal. A reference address in the first layer corresponds to a boundary between a signal recorded area and a signal unrecorded area in the second layer. A specified address in the first layer corresponds to a position radially separated from the position at the reference address by an allowable range. A misalignment between tracks on the first and second layers is concluded to be within the allowable range in cases where the sub signal substantially takes a reference level when the detected address reaches the specified address.

摘要翻译： 由激光束在光盘的第一层反射引起的反射光被转换为主信号。 由激光束在光盘的第二层的反射引起的反射光被转换为子信号。 从主信号检测第一层中当前访问位置的地址。 第一层中的参考地址对应于第二层中的信号记录区域和信号未记录区域之间的边界。 第一层中的指定地址对应于与参考地址处的位置径向分离允许范围的位置。 在检测到的地址到达指定的地址时子信号基本上采用参考电平的情况下，第一和第二层上的磁道之间的未对准结论在允许的范围内。

公开(公告)号：US20070070846A1

公开(公告)日：2007-03-29

申请号：US11521328

申请日：2006-09-15

申请人： Kazunori Tokiwa ,  Hideharu Eguchi ,  Toshiyuki Kato ,  Hiroshi Tabata ,  Yasuhiko Teranishi

发明人： Kazunori Tokiwa ,  Hideharu Eguchi ,  Toshiyuki Kato ,  Hiroshi Tabata ,  Yasuhiko Teranishi

IPC分类号： G11B7/12

CPC分类号： G11B7/1267 ,  G11B7/00557 ,  G11B7/00736

摘要： Test signals are recorded on a prescribed area in an optical disc. The prescribed area is scanned by a laser beam while the power of the laser beam is changed among different DC erasing values. The different DC erasing values are assigned to the recorded test signals, respectively. The recorded test signals are reproduced from the prescribed area to obtain reproduced signals. Parameter values of the respective reproduced signals are detected. The detected parameter values correspond to the different DC erasing values, respectively. Among the detected parameter values, a detected parameter value is decided which matches a target. One corresponding to the decided parameter value is selected from the different DC erasing values. A prescribed coefficient and the selected DC erasing value are multiplied to calculate an optimum level of an erasing power of the laser beam.

摘要翻译： 测试信号被记录在光盘中的规定区域上。 在激光束的功率在不同的直流擦除值之间变化时，通过激光束扫描规定区域。 不同的直流擦除值分别分配给记录的测试信号。 记录的测试信号从规定区域再现，以获得再现信号。 检测各个再现信号的参数值。 检测到的参数值分别对应于不同的直流擦除值。 在检测到的参数值中，确定与目标匹配的检测参数值。 从不同的直流擦除值中选择与决定的参数值对应的一个。 乘以规定系数和所选择的直流擦除值，以计算激光束的擦除功率的最佳电平。

公开(公告)号：US5963524A

公开(公告)日：1999-10-05

申请号：US859708

申请日：1997-05-21

申请人： Kazunori Tokiwa ,  Kenichi Horikiri ,  Hirokazu Iida

发明人： Kazunori Tokiwa ,  Kenichi Horikiri ,  Hirokazu Iida

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B19/12

CPC分类号： G11B19/12 ,  G11B7/0945 ,  G11B7/1365 ,  G11B7/139 ,  G11B2007/0006 ,  G11B7/0908 ,  G11B7/0925

摘要： An optical disk apparatus capable of automatically setting a pickup lens suitable for an optional optical disk selected from a plurality of optical disks having different thicknesses. Current flowing through an actuator is detected with a detector circuit, A/D converted, and supplied to a controller. The controller detects the in-focus positions at the surface and reflection film of an optical disk in accordance with an FOK signal and an FZC signal, calculates the current values flowing through the actuator at the in-focus positions, and judges the thickness of the optical disk in accordance with a difference between the current values.

摘要翻译： 一种光盘装置，其能够自动设置适于从具有不同厚度的多个光盘中选择的可选光盘的拾取镜头。 流过致动器的电流用检测器电路进行检测，A / D转换，并提供给控制器。 控制器根据FOK信号和FZC信号检测光盘的表面和反射膜上的对焦位置，计算在对焦位置处流过致动器的电流值，并且判断 光盘根据当前值之间的差异。

公开(公告)号：US07729218B2

公开(公告)日：2010-06-01

申请号：US11521328

申请日：2006-09-15

申请人： Kazunori Tokiwa ,  Hideharu Eguchi ,  Toshiyuki Kato ,  Hiroshi Tabata ,  Yasuhiko Teranishi

发明人： Kazunori Tokiwa ,  Hideharu Eguchi ,  Toshiyuki Kato ,  Hiroshi Tabata ,  Yasuhiko Teranishi

IPC分类号： G11B20/10

CPC分类号： G11B7/1267 ,  G11B7/00557 ,  G11B7/00736

摘要： Test signals are recorded on a prescribed area in an optical disc. The prescribed area is scanned by a laser beam while the power of the laser beam is changed among different DC erasing values. The different DC erasing values are assigned to the recorded test signals, respectively. The recorded test signals are reproduced from the prescribed area to obtain reproduced signals. Parameter values of the respective reproduced signals are detected. The detected parameter values correspond to the different DC erasing values, respectively. Among the detected parameter values, a detected parameter value is decided which matches a target. One corresponding to the decided parameter value is selected from the different DC erasing values. A prescribed coefficient and the selected DC erasing value are multiplied to calculate an optimum level of an erasing power of the laser beam.

摘要翻译： 测试信号被记录在光盘中的规定区域上。 在激光束的功率在不同的直流擦除值之间变化时，通过激光束扫描规定区域。 不同的直流擦除值分别分配给记录的测试信号。 记录的测试信号从规定区域再现，以获得再现信号。 检测各个再现信号的参数值。 检测到的参数值分别对应于不同的直流擦除值。 在检测到的参数值中，确定与目标匹配的检测参数值。 从不同的直流擦除值中选择与决定的参数值对应的一个。 乘以规定系数和所选择的直流擦除值，以计算激光束的擦除功率的最佳电平。

公开(公告)号：US20070127339A1

公开(公告)日：2007-06-07

申请号：US11594183

申请日：2006-11-08

申请人： Kazunori Tokiwa

发明人： Kazunori Tokiwa

IPC分类号： G11B7/00

CPC分类号： G11B7/268 ,  G11B7/00375 ,  G11B20/1816 ,  G11B2007/0013 ,  G11B2220/215 ,  G11B2220/237 ,  G11B2220/2562

摘要： Reflected light caused by reflection of a laser beam at a first layer of an optical disc is converted into a main signal. Reflected light caused by reflection of the laser beam at a second layer of the optical disc is converted into a sub signal. An address of a currently-accessed position in the first layer is detected from the main signal. A reference address in the first layer corresponds to a boundary between a signal recorded area and a signal unrecorded area in the second layer. A specified address in the first layer corresponds to a position radially separated from the position at the reference address by an allowable range. A misalignment between tracks on the first and second layers is concluded to be within the allowable range in cases where the sub signal substantially takes a reference level when the detected address reaches the specified address.

摘要翻译： 由激光束在光盘的第一层反射引起的反射光被转换为主信号。 由激光束在光盘的第二层的反射引起的反射光被转换为子信号。 从主信号检测第一层中当前访问位置的地址。 第一层中的参考地址对应于第二层中的信号记录区域和信号未记录区域之间的边界。 第一层中的指定地址对应于与参考地址处的位置径向分离允许范围的位置。 在检测到的地址到达指定的地址时子信号基本上采用参考电平的情况下，第一和第二层上的磁道之间的未对准结论在允许的范围内。

公开(公告)号：US20070070858A1

公开(公告)日：2007-03-29

申请号：US11524252

申请日：2006-09-21

申请人： Yasuhiko Taranishi ,  Toshiyuki Kato ,  Hiroshi Tabata ,  Kazunori Tokiwa

发明人： Yasuhiko Taranishi ,  Toshiyuki Kato ,  Hiroshi Tabata ,  Kazunori Tokiwa

IPC分类号： G11B7/00

CPC分类号： G11B7/1267 ,  G11B7/0062 ,  G11B2007/0013

摘要： User data is recorded on a data area in first one of recording layers in a rewritable optical disc through the use of a laser beam having a power changing among different values including a first erasing power value. Test signals are recorded and reproduced on and from a section in a trial write area in the first recording layer. A region in the first recording layer is illuminated with the laser beam having a power equal to a second erasing power value to be subjected to signal erasure before the test signals are recorded and reproduced on and from the section in the trial write area. The region includes the section in the trial write area. The second erasing power value is equal to the first erasing power value multiplied by a coefficient in the range of 1.5 to 3.

摘要翻译： 通过使用在包括第一擦除功率值的不同值之间具有功率变化的激光束，将用户数据记录在可重写光盘中的记录层的第一个的数据区域上。 测试信号被记录在第一记录层中的试写区域中的部分上并被再现。 第一记录层中的区域被照射具有等于第二擦除功率值的功率的激光束，以在测试信号被记录并再现在试写区域中的部分之前进行信号擦除。 该地区包括试卷写作区域。 第二擦除功率值等于第一擦除功率值乘以1.5至3的范围内的系数。

公开(公告)号：US5237558A

公开(公告)日：1993-08-17

申请号：US731316

申请日：1991-07-17

申请人： Kenichi Horikiri ,  Kazunori Tokiwa ,  Masahiro Sato

发明人： Kenichi Horikiri ,  Kazunori Tokiwa ,  Masahiro Sato

IPC分类号： G11B7/125 ,  H01S5/06 ,  H01S5/062 ,  H01S5/068 ,  H01S5/0683

CPC分类号： G11B7/126 ,  H01S5/06213 ,  H01S5/0617 ,  H01S5/06808 ,  H01S5/06832

摘要： A laser driver circuit of an optical disk recording/reproducing apparatus includes a laser output detecting unit for detecting a digital average value of a laser output, first and second memories for storing a digital value of a current to be supplied to a laser diode, first and second D/A converters for converting the digital values stored in the first and second memories into analog values, and a current supplying unit for supplying a current proportional to an output of the first D/A converter or a current proportional to a sum of outputs of the first and second D/A converters to the laser diode.

摘要翻译： 光盘记录/再现装置的激光驱动器电路包括用于检测激光输出的数字平均值的激光输出检测单元，用于存储要提供给激光二极管的电流的数字值的第一和第二存储器，第一 以及第二D / A转换器，用于将存储在第一和第二存储器中的数字值转换为模拟值;以及电流提供单元，用于提供与第一D / A转换器的输出成比例的电流或与 第一和第二D / A转换器的输出到激光二极管。