公开(公告)号：US20100195464A1

公开(公告)日：2010-08-05

申请号：US12666998

申请日：2008-07-02

申请人： Tsuyoshi Katayama ,  Takeharu Yamamoto ,  Mitsuru Sakai

发明人： Tsuyoshi Katayama ,  Takeharu Yamamoto ,  Mitsuru Sakai

IPC分类号： G11B20/10

CPC分类号： G11B7/0906

摘要： A first comparator (112a) compares a first voltage signal to a predetermined threshold to output a first binary signal corresponding to a comparison result. A second comparator (112b) compares a second voltage signal to a predetermined threshold to output a second binary signal corresponding to a comparison result. A first digital sampling section (113a) samples the first binary signal output by the first comparator 112a to generate a first sampling signal. A second digital sampling section (113b) samples the second binary signal output by the second comparator (112b) to generate a second sampling signal. A phase difference detector circuit (114) detects a phase difference between the first sampling signal generated by the first digital sampling section (113a) and the second sampling signal generated by the second digital sampling section (113b).

摘要翻译： 第一比较器（112a）将第一电压信号与预定阈值进行比较，以输出与比较结果相对应的第一二进制信号。 第二比较器（112b）将第二电压信号与预定阈值进行比较，以输出对应于比较结果的第二二进制信号。 第一数字采样部分（113a）对由第一比较器112a输出的第一二进制信号进行采样以产生第一采样信号。 第二数字采样部分（113b）对由第二比较器（112b）输出的第二二进制信号采样以产生第二采样信号。 相位差检测器电路（114）检测由第一数字采样部分（113a）产生的第一采样信号和由第二数字采样部分（113b）产生的第二采样信号之间的相位差。

公开(公告)号：US07154832B2

公开(公告)日：2006-12-26

申请号：US10317042

申请日：2002-12-12

申请人： Yoshihiro Kanda ,  Takeharu Yamamoto

发明人： Yoshihiro Kanda ,  Takeharu Yamamoto

IPC分类号： G11B7/00

CPC分类号： G11B19/28 ,  G11B19/125

摘要： A type of disc is judged at high reliability irrespective of a presence of information record or magnitude of disc eccentricity. A reproduction apparatus judges the type of an optical disc to reproduce information recorded on tracks of the optical disc. The disc is classified as a type of read-only optical discs whose tracks are formed with pits and as a type of recordable optical discs whose tracks are formed with wobbling grooves. The apparatus includes a motor which rotates the optical disc, a head which irradiates the tracks of the optical disc rotated by the motor with an optical beam and outputs two detection signals corresponding to reflected light from the optical disc, and a controller which judges the type of the optical disc according to changes of a period of a specific signal contained in a push-pull signal generated from the two detection signals by varying a rotating speed of the motor.

公开(公告)号：US5699334A

公开(公告)日：1997-12-16

申请号：US589861

申请日：1996-01-22

申请人： Shin-ichi Yamada ,  Takeharu Yamamoto ,  Yasuaki Edahiro ,  Mitsurou Moriya

发明人： Shin-ichi Yamada ,  Takeharu Yamamoto ,  Yasuaki Edahiro ,  Mitsurou Moriya

IPC分类号： G11B7/095 ,  G11B7/09

CPC分类号： G11B7/0941

摘要： A tracking control device for controlling a position of a beam spot formed by converging a light beam on a disk having tracks formed thereon includes: an actuator for moving the beam spot in a direction substantially perpendicular to the tracks; a tracking error detecting circuit for detecting a deviation of the beam spot from one of the tracks using the light beam returning from the disk and for outputting a tracking error signal indicative of the detected deviation; and a control circuit section for outputting a driving signal to drive the actuator in accordance with the tracking error signal so as to control the beam spot to be positioned on the one of the tracks. When the driving signal is saturated, the control circuit section obtains a saturation signal in accordance with an amount of the saturation, delays the saturation signal, and supplies the saturation signal to the actuator together with the driving signal.

摘要翻译： 一种跟踪控制装置，用于控制通过将光束会聚在具有形成在其上的轨道的盘上而形成的光束点的位置，包括：致动器，用于沿大致垂直于轨道的方向移动光束点; 跟踪误差检测电路，用于使用从光盘返回的光束来检测光束点与其中一个光点的偏差，并输出指示检测到的偏差的跟踪误差信号; 以及控制电路部分，用于根据跟踪误差信号输出驱动信号以驱动致动器，以便控制光束点位于一条轨道上。 当驱动信号饱和时，控制电路部分根据饱和量获得饱和信号，延迟饱和信号，并将饱和信号与驱动信号一起提供给致动器。

公开(公告)号：US09114447B2

公开(公告)日：2015-08-25

申请号：US13514348

申请日：2009-12-14

申请人： Takeharu Yamamoto

发明人： Takeharu Yamamoto

IPC分类号： B21C23/21

CPC分类号： B21C23/211

摘要： An extrusion press includes an end platen, a fixed platen arranged at the rear thereof, a tie rod configured to link the end platen and the fixed platen, a die, a container loaded with a billet, an extrusion stem configured to press the billet, a crosshead attached with the extrusion stem, and an extrusion drive configured to reciprocate the extrusion stem. The extrusion drive includes a rotatable wire drum driven by an electric extrusion main motor and drives the extrusion stem to perform extrusion molding by winding the wire by rotating the wire drum.

摘要翻译： 挤压机包括端台板，布置在其后部的固定压板，构造成连接端板和固定压板的拉杆，模具，装有坯料的容器，构造成挤压坯料的挤压杆， 与挤出杆连接的十字头和构造成使挤出杆往复移动的挤出驱动器。 挤出驱动器包括由电动挤压主电机驱动的可旋转的钢丝鼓，并驱动挤出杆，通过旋转钢丝卷筒卷绕钢丝来进行挤出成型。

公开(公告)号：US08547811B2

公开(公告)日：2013-10-01

申请号：US13322923

申请日：2011-05-31

申请人： Kenji Fujiune ,  Takeharu Yamamoto

发明人： Kenji Fujiune ,  Takeharu Yamamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/1267 ,  G11B7/0062

摘要： With a large capacity of an optical disk and high-speed recording, a frequency of a recording signal is increased and a pulse width is narrowed. In the case that a laser is driven by a signal having the short pulse width, unfortunately the high-speed recording is hardly performed to an optical disk when a rise time and a fall time of the optical pulse are lengthened. During user data recording, a bottom driving current is set to a second bottom driving current value that is a current value of a threshold or less, so that the rise time and the fall time of the optical pulse can be shortened to perform the high-speed recording of the optical disk.

摘要翻译： 利用大容量的光盘和高速记录，记录信号的频率增加并且脉冲宽度变窄。 在激光器由具有短脉冲宽度的信号驱动的情况下，不幸的是，当光脉冲的上升时间和下降时间延长时，几乎不对光盘执行高速记录。 在用户数据记录期间，将底部驱动电流设定为阈值以下的当前值的第二底部驱动电流值，从而可以缩短光脉冲的上升时间和下降时间， 速度记录光盘。

公开(公告)号：US08395980B2

公开(公告)日：2013-03-12

申请号：US13391483

申请日：2010-07-30

申请人： Yoshiaki Komma ,  Joji Anzai ,  Yasumori Hino ,  Kousei Sano ,  Hideki Nakata ,  Keisuke Fujimoto ,  Takeharu Yamamoto ,  Takeshi Shimamoto

发明人： Yoshiaki Komma ,  Joji Anzai ,  Yasumori Hino ,  Kousei Sano ,  Hideki Nakata ,  Keisuke Fujimoto ,  Takeharu Yamamoto ,  Takeshi Shimamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/1275 ,  G11B2007/0006 ,  G11B2007/0013

摘要： When information is recorded or reproduced on or from an optical information medium having three or more recording layers using blue light, interference by another layer light is reduced and, when information is reproduced from an optical information medium using red light, an S/N ratio is held excellently high.An optical head device includes a first laser light source (1) which emits blue light, a second laser light source (2) which emits red light, an objective lens (11) which focuses the blue light onto a recording layer of a first optical disc (12) or focuses the red light onto a recording layer of a second optical disc (13), a photodetector (9) which receives the blue light reflected by the recording layer of the first optical disc (12) or the red light reflected by the recording layer of the second optical disc (13) and outputs an electric signal in accordance with an amount of the received blue light or red light, and a wavelength selective light blocking region (7x) which blocks a predetermined range of the blue light including an optical axis thereof to prevent the predetermined range from reaching the photodetector (9), and transmits the red light.

摘要翻译： 当使用蓝光在具有三个或更多个记录层的光信息介质上记录或再现信息时，减少了另一层光的干扰，并且当使用红光从光信息介质再现信息时，S / N比 举办得非常高。 光头装置包括发射蓝光的第一激光光源（1），发出红光的第二激光光源（2），将蓝光聚焦到第一光学记录层上的物镜（11） 盘（12）或将红光聚焦到第二光盘（13）的记录层上，接收由第一光盘（12）的记录层反射的蓝光的光电检测器（9）或反射的红光 通过第二光盘（13）的记录层，并根据所接收的蓝光或红光的量输出电信号，以及阻挡蓝光的预定范围的波长选择性遮光区域（7x） 包括其光轴以防止预定范围到达光电检测器（9），并发送红光。

公开(公告)号：US08036254B2

公开(公告)日：2011-10-11

申请号：US11917982

申请日：2006-06-14

申请人： Kenzo Ishibashi ,  Hisashi Senga ,  Takeharu Yamamoto

发明人： Kenzo Ishibashi ,  Hisashi Senga ,  Takeharu Yamamoto

IPC分类号： H01S3/00

CPC分类号： G11B7/1263 ,  H01S5/0427 ,  H01S5/06808 ,  H01S5/0683

摘要： The output voltage of a cathode drive-type semiconductor laser driving circuit is set to a minimum, power consumption by a driving circuit portion is suppressed, and the heat that is generated by the optical head or the optical disc device is reduced. In addition to a conventional configuration, the semiconductor laser driving circuit of the invention measures the cathode voltage (Vout) of a semiconductor laser (1) and controls the anode voltage (Vld) such that the cathode voltage (Vout) becomes a predetermined level, and by doing so sets the output voltage of the semiconductor laser driving circuit to a predetermined level in order to curtail power consumption by the driving circuit and minimize the rise in temperature of the optical head or the optical disc device.

摘要翻译： 阴极驱动型半导体激光器驱动电路的输出电压被设定为最小，驱动电路部分的功耗被抑制，并且由光头或光盘装置产生的热量减少。 除了常规配置之外，本发明的半导体激光器驱动电路测量半导体激光器（1）的阴极电压（Vout）并且控制阳极电压（Vld）使得阴极电压（Vout）变为预定水平， 并且通过这样做，将半导体激光器驱动电路的输出电压设置为预定电平，以便减少驱动电路的功耗，并使光头或光盘装置的温度上升最小化。

公开(公告)号：US07911890B2

公开(公告)日：2011-03-22

申请号：US12066869

申请日：2006-09-13

申请人： Akihiro Arai ,  Takeharu Yamamoto

发明人： Akihiro Arai ,  Takeharu Yamamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/0912

摘要： An optical disc drive includes: an optical branching element for splitting light from a light source into main and sub-beams; a condenser element for condensing the main and sub-beams; a photodetector section including photodetectors to receive reflected portions of the main and sub-beams, each photodetector having photosensitive areas, each of which outputs a signal representing the intensity of light received there; and a computing section for generating a first focus signal, representing where the focal point of the main beam is located with respect to the storage layer, based on the reflected light of the main beam, and a second focus signal based on the reflected light of the main and sub-beams.

摘要翻译： 光盘驱动器包括：光分路元件，用于将来自光源的光分成主光束和子光束; 用于冷凝主光束和副光束的聚光元件; 光电检测器部分包括用于接收主光束和副光束的反射部分的光电检测器，每个光电检测器具有感光区域，每个光电检测器输出表示在那里接收的光的强度的信号; 以及计算部分，用于基于主光束的反射光产生表示主光束的焦点相对于存储层位于何处的第一聚焦信号，以及基于主光束的反射光的第二聚焦信号 主梁和副梁。

公开(公告)号：US20100263428A1

公开(公告)日：2010-10-21

申请号：US12758229

申请日：2010-04-12

申请人： Takeharu Yamamoto ,  Koji Nakano ,  Nobuhiko Matsumoto

发明人： Takeharu Yamamoto ,  Koji Nakano ,  Nobuhiko Matsumoto

IPC分类号： B21C23/21 ,  B21C27/00 ,  B21C35/04

CPC分类号： B21C35/04 ,  B21C23/21

摘要： A fixing device is configured by: a pushing device of the die unit capable of pushing the die unit from ahead in the direction of extrusion; and a pressing device of the die unit capable of pressing a die ring and the die cassette from above in a direction intersecting the direction of extrusion. The fixing device of the die unit is arranged between the discard cutting device and an end platen and at the same time, the pressing device of the die unit is provided with a fixing metal fitting of the pushing device of the die unit and a pressing metal fitting of the die ring and when the pressing device of the die unit operates and presses and fixes the die ring and the die cassette, the pushing device of the die is fixed.

摘要翻译： 定影装置通过以下方式构成：模具单元的推压装置能够在挤压方向从前方推出模具单元; 以及能够沿与挤出方向相交的方向从上方按压模环和模具盒的模具单元的按压装置。 模具单元的定影装置设置在废弃切割装置和端板之间，同时，模具单元的按压装置设置有模具单元的推动装置的固定金属配件和压制金属 模具环的装配，当模具单元的按压装置工作并按压并固定模具环和模具盒时，模具的推动装置被固定。

公开(公告)号：US07765845B2

公开(公告)日：2010-08-03

申请号：US12095744

申请日：2006-12-08

申请人： Koji Nakano ,  Takeharu Yamamoto

发明人： Koji Nakano ,  Takeharu Yamamoto

IPC分类号： B21C25/00

CPC分类号： B21C26/00 ,  B21C23/21 ,  B21C23/215 ,  B21C33/00

摘要： The stem slide device of the present invention in an extruder has a stem vertical movement support (71) and slide guide members (72-1, 2) fastened to the support and forming guide grooves. A stem (6) pushing against a billet loaded in a container is held at the slide table (73) horizontally. The slide table slides in the vertical direction along the vertical face of the support. When the slide table is positioned at the bottom end of the guide groove, the hydraulic cylinders (77-1, 2) are driven so that the rods (78-1, 2) push the back surface of the slide table against the vertical face of the support. Therefore, the axis of the stem is held matched with the axis of the container.

摘要翻译： 本发明的挤压机的杆滑动装置具有杆垂直运动支撑件（71）和固定到支撑件上并形成导向槽的滑动导向件（72-1,2）。 推动装在容器中的坯料的杆（6）水平地保持在滑动台（73）上。 滑动台沿着支撑件的垂直面在垂直方向上滑动。 当滑动台位于引导槽的底端时，驱动液压缸（77-1,2），使得杆（78-1,2）将滑动台的后表面抵靠垂直面 的支持。 因此，杆的轴线与容器的轴线保持一致。