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1. 发明授权

US5777963A Device for opening and closing a tracking servo loop of an optical disc reproduction device in accordance with the value of an on-track signal 失效
标题翻译：根据导轨信号的值打开和关闭光盘再现装置的跟踪伺服环的装置
公开(公告)号：US5777963A
公开(公告)日：1998-07-07
申请号：US724924
申请日：1996-10-02
申请人： Hiroyuki Fueki , Wataru Hasegawa
发明人： Hiroyuki Fueki , Wataru Hasegawa
IPC分类号： G11B7/00 , G11B7/005 , G11B7/085 , G11B21/10 , G11B7/095
CPC分类号： G11B7/08517
摘要： A servo control device for controlling operation of tracking servo loop includes: on-track signal generating unit for generating on-track signal indicating whether a light beam irradiated on an optical disk is positioned on track of the optical disk or not, on the basis of the light beam reflected by the optical disk; tracking error signal generating unit for generating tracking error signal on the basis of the light beam reflected by the optical disk; discriminating unit for discriminating whether the light beam irradiated on the optical disk is positioned in pre-pit area or not; holding unit for holding value of the on-track signal immediately before entrance of the light beam to the pre-pit area on the basis of discrimination result of the discriminating unit; and control unit for opening and closing the tracking servo loop in accordance with the value of the on-track signal held by the holding unit and the tracking error signal.
摘要翻译：用于控制跟踪伺服环路的操作的伺服控制装置包括：轨道信号产生单元，用于产生指示照射在光盘上的光束是否位于光盘的轨道上的导轨信号，基于由光盘反射的光束; 跟踪误差信号产生单元，用于基于由光盘反射的光束产生跟踪误差信号; 识别单元，用于鉴别照射在光盘上的光束是否位于预凹坑区域内; 保持单元，用于基于识别单元的判别结果，将光束入射到前置凹坑区域之前立即保持跟踪信号的值; 以及根据由保持单元保持的导通信号的值和跟踪误差信号来打开和关闭跟踪伺服环路的控制单元。

2. 发明授权

US06740991B2 Current noise insulated spindle motor 失效
标题翻译：电流噪声绝缘主轴电机
公开(公告)号：US06740991B2
公开(公告)日：2004-05-25
申请号：US09789740
申请日：2001-02-22
申请人： Keiichi Takagi , Seiichi Yamazaki , Hiroyuki Fueki , Toshiyuki Kaneko
发明人： Keiichi Takagi , Seiichi Yamazaki , Hiroyuki Fueki , Toshiyuki Kaneko
IPC分类号： H02K524
CPC分类号： G11B19/04 , F16F15/08 , G11B33/08 , H02K5/24
摘要： The motor apparatus includes a motor and an insulating device. The motor such as a spindle motor is driven with pulse width modulation. Then, the insulating device insulates an object to be protected, which should be protected from a noise current generated from the motor, from the motor.
摘要翻译：电动机装置包括电动机和绝缘装置。电机如主轴电机由脉宽调制驱动。然后，绝缘装置将要被保护的物体与马达产生的噪声电流隔离。

3. 发明授权

US06226245B1 Control system for controlling the rotational speed of a disc to a maximum speed without causing excessive vibration 失效
标题翻译：用于将盘的转速控制到最大速度而不引起过度振动的控制系统
公开(公告)号：US06226245B1
公开(公告)日：2001-05-01
申请号：US08922531
申请日：1997-09-03
申请人： Hiroyuki Fueki
发明人： Hiroyuki Fueki
IPC分类号： G11B700
CPC分类号： G11B19/28 , G11B7/0946 , G11B7/0956 , G11B19/26
摘要： A reading device is provided for reading information recorded on an optical disc. A relative displacement between the reading device and the optical disc is detected. The relative displacement is caused by rotating the disc at a speed higher than an ordinary speed. A maximum rotating speed of the optical disc at the time when the displacement reaches a predetermined value is detected. The optical disc is rotated at an angular velocity which does not exceed the maximum rotating speed.
摘要翻译：提供读取装置，用于读取记录在光盘上的信息。检测读取装置和光盘之间的相对位移。相对位移是通过以比普通速度高的速度旋转盘而引起的。检测到位移达到预定值时光盘的最大转速。光盘以不超过最大转速的角速度旋转。

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