公开(公告)号：US20050036411A1

公开(公告)日：2005-02-17

申请号：US10915759

申请日：2004-08-11

申请人： Yoshiaki Ukawa

发明人： Yoshiaki Ukawa

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/085

CPC分类号： G11B7/08511 ,  G11B7/08505

摘要： A defocus amount specifying circuit specifies, as a focus error minimum defocus amount FMDF, a defocus amount by which the amplitude of a focus error signal becomes minimum in a state in which tracking servo is off in a period after insertion of an optical disc and before a seek operation, and specifies, as a jitter minimum defocus amount JMDF, a defocus amount by which a jitter amount becomes minimum in a state in which tracking servo is on. A defocus amount supplying circuit transmits the focus error minimum defocus amount FMDF to a focus servo circuit to perform focus control during a seek operation, and transmits the jitter minimum defocus amount JMDF to the focus servo circuit to perform focus control after the seek operation.

摘要翻译： 散焦量指定电路在光盘插入后的期间内，在跟踪伺服关闭的状态下，将聚焦误差信号的振幅变为最小的散焦量作为聚焦误差最小散焦量FMDF， 作为抖动最小散焦量JMDF，在跟踪伺服打开的状态下，指定抖动量变得最小的散焦量。 散焦量供给电路将焦点误差最小散焦量FMDF发送到聚焦伺服电路，以在寻道操作期间进行聚焦控制，并且将抖动最小散焦量JMDF发送到聚焦伺服电路，以在寻找操作之后进行聚焦控制。

公开(公告)号：US20110248810A1

公开(公告)日：2011-10-13

申请号：US13165499

申请日：2011-06-21

申请人： Yoshiaki UKAWA ,  Toshikazu INUBUSHI

发明人： Yoshiaki UKAWA ,  Toshikazu INUBUSHI

IPC分类号： H01F27/29

CPC分类号： H01F5/04 ,  H01F27/292 ,  H01Q1/243 ,  H01Q7/08

摘要： The disclosure provides a wire-wound coil that can prevent contact between an outer flange portion of the wire-wound coil and a mount board so as to prevent breakage of the outer flange portion and misalignment and unwinding of a wound conductive wire. A groove is provided in an outer side face of a flange at an end of a winding core, and an inner flange portion and an outer flange portion are provided on opposite sides of the groove. A distance from a bottom face of the groove to at least an outer side face of the outer flange portion that would be facing a mount board or is attached to a mount board is shorter than a distance from the bottom face of the groove to the inner flange portion.

摘要翻译： 本发明提供一种线绕线圈，其可以防止绕线线圈的外部凸缘部分与安装板之间的接触，从而防止外部凸缘部分的断裂和卷绕的导线的未对准和退绕。 在卷芯的端部的凸缘的外侧面设置有槽，在所述槽的相对侧设置有内凸缘部和外凸缘部。 从凹槽的底面到外凸缘部分的至少面向安装板或附接到安装板的外侧面的距离比从凹槽的底面到内部的距离短 凸缘部分。

公开(公告)号：US07142488B2

公开(公告)日：2006-11-28

申请号：US10449601

申请日：2003-06-02

申请人： Yoshiaki Ukawa

发明人： Yoshiaki Ukawa

IPC分类号： G11B7/095

CPC分类号： G11B7/094 ,  G11B7/0901

摘要： A controller configures a balance position of a tracking error signal at a point at which an error rate indicates a minimum value while the balance position of the tracking error signal from an optical pickup is shifted from the center in reproducing the optical disk. Therefore, even when a pit on the track of the optical disk is asymmetrical with respect to the center, the error rate in reproducing the optical disk is reduced and the precision of the reproducing signal is enhanced.

公开(公告)号：US07283438B2

公开(公告)日：2007-10-16

申请号：US10915759

申请日：2004-08-11

申请人： Yoshiaki Ukawa

发明人： Yoshiaki Ukawa

IPC分类号： G11B7/00

CPC分类号： G11B7/08511 ,  G11B7/08505

摘要： A defocus amount specifying circuit specifies, as a focus error minimum defocus amount FMDF, a defocus amount by which the amplitude of a focus error signal becomes minimum in a state in which tracking servo is off in a period after insertion of an optical disc and before a seek operation, and specifies, as a jitter minimum defocus amount JMDF, a defocus amount by which a jitter amount becomes minimum in a state in which tracking servo is on. A defocus amount supplying circuit transmits the focus error minimum defocus amount FMDF to a focus servo circuit to perform focus control during a seek operation, and transmits the jitter minimum defocus amount JMDF to the focus servo circuit to perform focus control after the seek operation.

摘要翻译： 散焦量指定电路在光盘插入后的期间内，在跟踪伺服关闭的状态下，将聚焦误差信号的振幅变为最小的散焦量作为聚焦误差最小散焦量FMDF， 作为抖动最小散焦量JMDF，在跟踪伺服打开的状态下，指定抖动量变得最小的散焦量。 散焦量供给电路将焦点误差最小散焦量FMDF发送到聚焦伺服电路，以在寻道操作期间进行聚焦控制，并且将抖动最小散焦量JMDF发送到聚焦伺服电路，以在寻找操作之后进行聚焦控制。

公开(公告)号：US08193892B2

公开(公告)日：2012-06-05

申请号：US13165499

申请日：2011-06-21

申请人： Yoshiaki Ukawa ,  Toshikazu Inubushi

发明人： Yoshiaki Ukawa ,  Toshikazu Inubushi

IPC分类号： H01F27/29

CPC分类号： H01F5/04 ,  H01F27/292 ,  H01Q1/243 ,  H01Q7/08

摘要： The disclosure provides a wire-wound coil that can prevent contact between an outer flange portion of the wire-wound coil and a mount board so as to prevent breakage of the outer flange portion and misalignment and unwinding of a wound conductive wire. A groove is provided in an outer side face of a flange at an end of a winding core, and an inner flange portion and an outer flange portion are provided on opposite sides of the groove. A distance from a bottom face of the groove to at least an outer side face of the outer flange portion that would be facing a mount board or is attached to a mount board is shorter than a distance from the bottom face of the groove to the inner flange portion.

摘要翻译： 本发明提供一种线绕线圈，其可以防止绕线线圈的外部凸缘部分与安装板之间的接触，从而防止外部凸缘部分的断裂和卷绕的导线的未对准和退绕。 在卷芯的端部的凸缘的外侧面设置有槽，在所述槽的相对侧设置有内凸缘部和外凸缘部。 从凹槽的底面到外凸缘部分的至少面向安装板或附接到安装板的外侧面的距离比从凹槽的底面到内部的距离短 凸缘部分。

公开(公告)号：US20060171289A1

公开(公告)日：2006-08-03

申请号：US11344209

申请日：2006-02-01

申请人： Teruaki Sogawa ,  Jyouji Yoshioka ,  Yoshiaki Ukawa ,  Takashi Kasahara ,  Katsuichi Inoue

发明人： Teruaki Sogawa ,  Jyouji Yoshioka ,  Yoshiaki Ukawa ,  Takashi Kasahara ,  Katsuichi Inoue

IPC分类号： G11B7/24 ,  G11B5/09

CPC分类号： G11B20/1816 ,  G11B7/00458 ,  G11B7/24082 ,  G11B7/24085

摘要： With conventional test discs, changing them takes much time when a pickup is subjected to signal evaluation with respect to DVD- family discs (DVD-R and DVD-RW) and DVD+ family discs (DVD+R and DVD+RW), leading to low testing efficiency. A test disc of the invention has, formed on a single glass substrate, areas where there are provided regions where pits or no pits are formed and areas where there are provided regions where wobbles and land prepits are formed with varying parameters.

摘要翻译： 对于传统的测试光盘，当拾取器相对于DVD系列光盘（DVD-R和DVD-RW）和DVD +家庭光盘（DVD + R和DVD + RW）进行信号评估时，更换它们需要很多时间，导致 测试效率低。 本发明的测试盘在单个玻璃基板上形成有形成凹坑或不形成坑的区域的区域，其中形成有具有变化参数的摆动和焊盘预凹坑的区域。

公开(公告)号：US20070215378A1

公开(公告)日：2007-09-20

申请号：US11717152

申请日：2007-03-13

申请人： Takashi Kasahara ,  Yoshiaki Ukawa

发明人： Takashi Kasahara ,  Yoshiaki Ukawa

IPC分类号： H05K1/03

CPC分类号： G11B7/12 ,  H05K1/118 ,  H05K3/363 ,  H05K3/4038 ,  H05K3/4084 ,  H05K3/4688 ,  H05K3/4691 ,  H05K2201/0305 ,  H05K2201/056 ,  H05K2201/10477

摘要： A circuit board has, jointed together with adhesive, a single-layer flexible PCB having a through hole formed therein in the thickness direction and a rigid member having copper foil formed on one side of an insulating base member. A conductive pattern on the single-layer flexible PCB and the copper foil are electrically connected together via solder filling the through hole. Thus, with a low-cost circuit board, unnecessary electromagnetic emissions can be effectively reduced.

摘要翻译： 电路板与粘合剂接合，在厚度方向上形成有通孔的单层柔性PCB，以及形成在绝缘基体的一侧上的具有铜箔的刚性构件。 单层柔性PCB和铜箔上的导电图案通过填充通孔的焊料电连接在一起。 因此，利用低成本电路板，可以有效地减少不必要的电磁辐射。

公开(公告)号：US07254097B2

公开(公告)日：2007-08-07

申请号：US10892143

申请日：2004-07-16

申请人： Toyoshi Nogami ,  Ryotaro Nakagawa ,  Yasunori Kuwayama ,  Yoshiaki Ukawa

发明人： Toyoshi Nogami ,  Ryotaro Nakagawa ,  Yasunori Kuwayama ,  Yoshiaki Ukawa

IPC分类号： G11B7/00

CPC分类号： G11B7/08511

摘要： An optical pickup of an optical disc apparatus has a lens holder for holding an objective lens is pivoted with a guide shaft slidably in a direction in parallel with an optical axis of the objective lens and rotatably around the guide shaft in a direction perpendicular to the optical axis. For focusing a laser beam on a data recording face of an optical disc in a focusing on operation, a wobble signal of rectangular waveform having a predetermined voltage and a predetermined frequency is applied to a tracking coil for reciprocally displacing the lens holder in the direction perpendicular to the optical axis, while a focusing coil is driven for moving the lens holder in the direction in parallel with the optical axis. Thus, the lens holder can be moved smoothly along the guide shaft, so that the possibility of failure of the focusing the laser beam on the optical disc can be reduced drastically.

摘要翻译： 光盘装置的光学拾取器具有用于保持物镜的透镜保持件，其与引导轴可在与物镜的光轴平行的方向上可滑动地旋转，并且在垂直于光学的方向上以导向轴的方式可旋转地围绕导向轴 轴。 为了在聚焦操作时将激光束聚焦在光盘的数据记录面上，具有预定电压和预定频率的矩形波形的摆动信号被施加到跟踪线圈，用于使透镜保持器沿垂直方向往复移位 同时驱动聚焦线圈以使透镜保持器沿与光轴平行的方向移动。 因此，透镜保持架能够沿着引导轴平滑地移动，从而可以大大减少激光束在光盘上的聚焦失败的可能性。

公开(公告)号：US20050013214A1

公开(公告)日：2005-01-20

申请号：US10892143

申请日：2004-07-16

申请人： Toyoshi Nogami ,  Ryotaro Nakagawa ,  Yasunori Kuwayama ,  Yoshiaki Ukawa

发明人： Toyoshi Nogami ,  Ryotaro Nakagawa ,  Yasunori Kuwayama ,  Yoshiaki Ukawa

IPC分类号： G11B7/00 ,  G11B7/085

CPC分类号： G11B7/08511

摘要： An optical pickup of an optical disc apparatus has a lens holder for holding an objective lens is pivoted with a guide shaft slidably in a direction in parallel with an optical axis of the objective lens and rotatably around the guide shaft in a direction perpendicular to the optical axis. For focusing a laser beam on a data recording face of an optical disc in a focusing on operation, a wobble signal of rectangular waveform having a predetermined voltage and a predetermined frequency is applied to a tracking coil for reciprocally displacing the lens holder in the direction perpendicular to the optical axis, while a focusing coil is driven for moving the lens holder in the direction in parallel with the optical axis. Thus, the lens holder can be moved smoothly along the guide shaft, so that the possibility of failure of the focusing the laser beam on the optical disc can be reduced drastically.

摘要翻译： 光盘装置的光学拾取器具有用于保持物镜的透镜保持件，其与引导轴可在与物镜的光轴平行的方向上可滑动地旋转，并且在垂直于光学的方向上以导向轴的方式可旋转地围绕导向轴 轴。 为了在聚焦操作时将激光束聚焦在光盘的数据记录面上，具有预定电压和预定频率的矩形波形的摆动信号被施加到跟踪线圈，用于使透镜保持器沿垂直方向往复移位 同时驱动聚焦线圈以使透镜保持器沿与光轴平行的方向移动。 因此，透镜保持架能够沿着引导轴平滑地移动，从而可以大大减少激光束在光盘上的聚焦失败的可能性。