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1. 发明授权

US5508987A Disk player having a system configuration for determining the diameter of loaded disks 失效
标题翻译：具有用于确定加载的盘的直径的系统配置的磁盘播放器
公开(公告)号：US5508987A
公开(公告)日：1996-04-16
申请号：US286401
申请日：1994-08-05
申请人： Masanori Matsunaga , Kouichi Takeno , Takehiro Kataoka
发明人： Masanori Matsunaga , Kouichi Takeno , Takehiro Kataoka
IPC分类号： G11B19/12 , G11B19/22 , G11B27/10 , G11B27/36
CPC分类号： G11B19/12 , G11B19/22 , G11B27/10
摘要： An object of this invention is to provide a disk player in which a plurality of disks different in diameter are driven, and can be identified with high accuracy. Disclosed is the disk player, a digital signal processing section applies to a CPU a synchronization signal which is raised to high level when the frequency of a detection signal outputted by a laser pickup reaches a predetermined value which permits a data reading operation, and a sense signal which is raised to high level when the frequency of the detection signal is shifted from a predetermined frequency. The CPU operates to rotate a spindle motor, and to brake the latter when the synchronization signal is raised to high level. The CPU further operates to detect a period of time which lapses from the time instant the motor is braked until the sense signal is fallen to low level, and to identify the loaded disk from the period of time thus detected.
摘要翻译：本发明的目的是提供一种盘驱动器，其中驱动直径不同的多个盘，并且可以高精度地识别。公开了一种盘播放器，当数字信号处理部分向CPU提供当激光拾取器输出的检测信号的频率达到允许数据读取操作的预定值时升高到高电平的同步信号，以及感测当检测信号的频率从预定频率偏移时升高到高电平的信号。 CPU操作以使主轴电动机旋转，并且当同步信号升高到高电平时对其进行制动。 CPU进一步操作以检测从电动机制动的时刻到感测信号下降到低电平之间的时间段，并且从所检测的时间段识别加载的磁盘。

2. 发明授权

US5446708A Pickup driving system for optical disk apparatus 失效
标题翻译：光盘装置的拾取驱动系统
公开(公告)号：US5446708A
公开(公告)日：1995-08-29
申请号：US098955
申请日：1993-07-28
申请人： Mamoru Takebayashi , Takashi Tateshima , Tomonori Mitsui , Makoto Ogawa , Hidehiro Takahashi , Takehiro Kataoka
发明人： Mamoru Takebayashi , Takashi Tateshima , Tomonori Mitsui , Makoto Ogawa , Hidehiro Takahashi , Takehiro Kataoka
IPC分类号： G11B7/085 , G11B7/09 , G11B21/02 , G11B17/22 , G11B7/095
CPC分类号： G11B7/08529
摘要： A pickup driving system for an optical disk apparatus is disclosed for moving a pickup unit across tracks of a rotating optical disk to read data at a target track position on the optical disk while avoiding drive motor instability, and errors caused by position overruns and underruns. A pulse voltage is superposed on the driving voltage of the drive motor for driving the pickup unit at predetermined intervals (defined by the pulse train) toward the target track position.
摘要翻译：公开了一种用于将拾取单元移动到旋转光盘的轨道上的拾取驱动系统，以在光盘上的目标轨迹位置读取数据，同时避免驱动电机不稳定，以及由位置超限和欠载引起的错误。脉冲电压叠加在驱动电动机的驱动电压上，用于以预定的间隔（由脉冲串定义）朝着目标轨迹位置驱动拾取单元。

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