公开(公告)号：US5604720A

公开(公告)日：1997-02-18

申请号：US424203

申请日：1995-04-19

申请人： Yasuyuki Kimura ,  Koichi Yamazaki

发明人： Yasuyuki Kimura ,  Koichi Yamazaki

IPC分类号： G11B21/08 ,  G11B7/0033 ,  G11B7/085 ,  G11B17/22

CPC分类号： G11B7/0033 ,  G11B7/08529

摘要： For recording or reproduction of information, the optical beam is moved relative to the recording medium along the longitudinal direction of a certain track. When accessing another track, the relative movement of the light beam along the longitudinal direction of the track is decelerated, and during this deceleration, the light beam is started to move in the direction transverse to the tracks toward the desired track. Thus, it is not necessary to wait for such time when the relative movement of the light beam along the longitudinal direction of the track has been completely stopped, and hence the necessary accessing time can substantially be reduced. If control is made to cause a decelerating rate of the relative movement to decrease continuously gradually or stepwise from a relatively high decelerating rate to a relatively low rate and the light beam is caused to start relatively moving toward the desired track while the relative movement is at the relatively low decelerating rate, it is allowed to effectively suppress occurrence of unwanted mechanical vibration due to abrupt deceleration of the relative movement.

摘要翻译： 为了记录或再现信息，光束相对于记录介质沿着某个轨道的纵向方向移动。 当进入另一个轨道时，沿着轨道的纵向方向的光束的相对移动减速，并且在该减速期间，光束开始沿着横向于轨道的方向朝期望的轨道移动。 因此，当光束沿着轨道的纵向的相对移动已经完全停止时，不需要等待这样的时间，因此可以显着地减少必要的访问时间。 如果进行控制使得相对运动的减速率从相对较高的减速速率逐渐或逐步地减小到相对较低的速率，并且使光束在相对运动处于 相对较低的减速率，能够有效地抑制由于相对运动的急剧减速引起的不希望的机械振动的发生。

公开(公告)号：US5572495A

公开(公告)日：1996-11-05

申请号：US350827

申请日：1994-12-07

申请人： Koichi Yamazaki ,  Kazuo Noda ,  Yonezo Furuya ,  Yasuyuki Kimura

发明人： Koichi Yamazaki ,  Kazuo Noda ,  Yonezo Furuya ,  Yasuyuki Kimura

IPC分类号： G11B7/085 ,  G11B7/09

CPC分类号： G11B7/0941

摘要： In a tracking or focusing servo control loop, there are provided a switch element for switch-controlling a tracking or focusing error signal, and a smoothing circuit for switching passage the error signal. An amount of detected reflection from an optical recording medium is monitored by a controller section, and the switching action of the switch element is ON/OFF-controlled by the controller section so as to maintain a servo loop gain at a predetermined standard. Thus, it is possible to maintain a constant servo loop gain without being influenced by variation in the laser light amount or difference in reflectivity characteristics of the recording layers of individual optical recording media, and constantly stable tracking servo control and/or focusing servo control can be performed.

摘要翻译： 在跟踪或聚焦伺服控制回路中，提供了用于切换控制跟踪或聚焦误差信号的开关元件，以及用于切换通过误差信号的平滑电路。 通过控制器部分监测来自光记录介质的检测反射量，并且由控制器部分对开关元件的开关动作进行ON / OFF控制，以使伺服环路增益保持在预定的标准。 因此，可以在不受激光量的变化或各个光记录介质的记录层的反射率特性的差异的影响的情况下保持恒定的伺服环路增益，并且可以持续稳定的跟踪伺服控制和/或聚焦伺服控制 被执行。

公开(公告)号：US5500841A

公开(公告)日：1996-03-19

申请号：US354363

申请日：1994-12-12

申请人： Keijirou Fujino ,  Koichi Yamazaki

发明人： Keijirou Fujino ,  Koichi Yamazaki

IPC分类号： G11B7/00 ,  G06K13/067 ,  G11B7/0033 ,  G11B17/34 ,  G11B19/28 ,  G11B25/04

CPC分类号： G11B19/28 ,  G06K13/067 ,  G11B17/34 ,  G11B25/04 ,  G11B7/0033

摘要： An information storage and retrieval device comprising a card conveyor mount for supporting and conveying a card-type information storage medium; a drive means having a linear motor, for reciprocatingly driving the card conveyor mount; an electrical power control circuit having switching elements, for providing power to the linear motor; speed detection means and for detecting the speed at which the card conveyor mount is moving. A speed command for calculating an indicated speed corresponding to an output from the speed detection means, shaping a speed command therefrom, and sending the command to the electrical power control circuit; and an optical head for irradiating a laser beam onto the information storage medium; whereby information is written to the information storage medium by the optical head irradiating the laser beam onto the information storage medium, and information is read therefrom by detecting laser light reflected from the information storage medium; the information storage and retrieval device further comprising a comparison means having a pair of comparators and having identical threshold values of different polarities.

摘要翻译： 一种信息存储和检索装置，包括用于支持和传送卡型信息存储介质的卡传送器安装件; 具有线性马达的驱动装置，用于往复驱动卡式输送机支架; 具有用于向线性电动机供电的开关元件的电力控制电路; 速度检测装置，用于检测卡片传送装置运动的速度。 速度命令，用于计算与速度检测装置的输出对应的指示速度，对其进行整形，并将该命令发送到电力控制电路; 以及用于将激光束照射到所述信息存储介质上的光学头; 从而通过将激光束照射到信息存储介质上的光学头将信息写入信息存储介质，并通过检测从信息存储介质反射的激光来读取信息; 所述信息存储和检索装置还包括具有一对比较器并具有不同极性的相同阈值的比较装置。

公开(公告)号：US5367515A

公开(公告)日：1994-11-22

申请号：US874089

申请日：1992-04-27

申请人： Koichi Yamazaki ,  Eiichi Nakamura

发明人： Koichi Yamazaki ,  Eiichi Nakamura

IPC分类号： G11B7/00 ,  G11B7/0033 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/085 ,  G11B7/125

CPC分类号： G11B7/126 ,  G11B7/08505

摘要： An optical information recording and reproduction apparatus that correctly performs tracking control even when there is a step in the information recording surface in an apparatus that records and reproduces information to and from an information recording medium such as an optical card or the like. An optical information recording and reproduction apparatus which focusses a light spot from a laser onto an optical information recording medium which has a tracking track and performs the recording and reproduction of information to required positions using the tracking track as a reference. The apparatus reduces the optical output of the laser when track jumping and seeking when there is an information reproduction operation.

摘要翻译： 即使在向诸如光卡等的信息记录介质记录和再现信息的设备中的信息记录表面中存在步骤时，也可以正确执行跟踪控制的光学信息记录和再现设备。 一种光信息记录和再现装置，其将来自激光器的光斑聚焦到具有跟踪轨迹的光信息记录介质上，并使用跟踪轨迹作为参考来执行信息到所需位置的记录和再现。 当存在信息再现操作时，当轨道跳跃和寻找时，该装置减少激光器的光输出。

公开(公告)号：US5153863A

公开(公告)日：1992-10-06

申请号：US744645

申请日：1991-08-08

申请人： Kazuo Noda ,  Koichi Yamazaki

发明人： Kazuo Noda ,  Koichi Yamazaki

IPC分类号： G06K7/015 ,  G06K17/00 ,  G11B7/00 ,  G11B7/0033 ,  G11B7/004 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B7/14

CPC分类号： G11B7/14 ,  G11B7/0033 ,  G11B7/0938 ,  G11B7/13 ,  G11B7/135 ,  G11B7/0901 ,  G11B7/0903

摘要： An apparatus for optically recording and reproducing information in and from an optical information recording medium having a guide track. The apparatus uses an optical head having a diffraction grating, for recording and reproducing information. In recording information, a zero-order diffraction light beam from the diffraction grating is used for the information recording, and plus/minus first-order diffraction light beams from the diffraction grating are used for the tracking. In reproducing information, the zero-order diffraction light beam is used for the tracking, and higher- and odd-order diffraction light beams including at least plus/minus first-order diffraction light beams are used for information reproduction.

摘要翻译： 一种用于在具有导轨的光学信息记录介质中光学记录和再现信息的装置。 该装置使用具有衍射光栅的光学头，用于记录和再现信息。 在记录信息中，使用来自衍射光栅的零级衍射光束进行信息记录，并且使用来自衍射光栅的正/负一级衍射光束进行跟踪。 在再现信息中，使用零级衍射光束进行跟踪，并且使用包括至少正/负一级衍射光束的高次和次级衍射光束进行信息再现。

公开(公告)号：US5065078A

公开(公告)日：1991-11-12

申请号：US449805

申请日：1989-12-13

申请人： Yuji Nao ,  Koichi Yamazaki

发明人： Yuji Nao ,  Koichi Yamazaki

IPC分类号： A63H29/22 ,  A63H30/04 ,  H02P5/68 ,  H02P7/00

CPC分类号： A63H30/04 ,  H02P7/05

摘要： A control circuit for a DC motor which drives a radio controlled toy. The control circuit receives a signal whose pulse width contains information relating to the desired speed and direction in which the motor is to turn. If the pulse width is greater than a predetermined value, the control signal will be generated which causes the motor to turn in a forward direction, and if the pulse width is less than the predetermined value a control signal will be generated which causes the motor to turn in a reverse direction. The pulse width is also converted to a voltage level which is compared to a ramp wave with a frequency which is higher than the frequency of the received signal. The output of the comparator is a signal with a frequency which is higher than that of the received signal, allowing precise control of the motor in overcoming inertial forces applied against it.

摘要翻译： 用于驱动无线电控制的玩具的直流电动机的控制电路。 控制电路接收脉冲宽度包含与电动机要转动的期望速度和方向有关的信息的信号。 如果脉冲宽度大于预定值，则将产生控制信号，使得电动机向前转动，并且如果脉冲宽度小于预定值，则将产生控制信号，使得电动机 转向相反的方向。 脉冲宽度也被转换为与具有高于接收信号的频率的频率的斜波相比较的电压电平。 比较器的输出是频率高于接收信号的信号，允许精确控制电机克服施加在其上的惯性力。