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1. 发明授权

US5745452A Apparatus and method for quickly focusing an optical disk player 失效
标题翻译：用于快速聚焦光盘播放器的装置和方法
公开(公告)号：US5745452A
公开(公告)日：1998-04-28
申请号：US692130
申请日：1996-08-05
申请人： Young-san Ko
发明人： Young-san Ko
IPC分类号： G11B7/08 , G11B7/085 , G11B7/09 , G11B7/095
CPC分类号： G11B7/0945 , G11B7/08511
摘要： An apparatus and method for approaching a focusing region are provided. The apparatus for approaching the focusing region includes a focus error detector, a signal envelope detector, a focusing region detector, a pulse generator for generating search pulses, a time counter, an offset generator, an adder, an actuator driver and a controller. The apparatus approaches the focusing region based on the generating search pulses, which are output in response to a signal generated by the signal envelope detector and a signal output by the focusing region detector. When a subsequent approach to the focusing region is made after finishing a first approach to the focusing region, the actuator is controlled by adding the search pulses to an offset voltage calculated when the first approach to the focusing region was performed to quickly position the object lens in the focusing region.
摘要翻译：提供了一种用于接近聚焦区域的设备和方法。用于接近聚焦区域的设备包括聚焦误差检测器，信号包络检测器，聚焦区域检测器，用于产生搜索脉冲的脉冲发生器，时间计数器，偏移发生器，加法器，致动器驱动器和控制器。该装置基于产生搜索脉冲而接近聚焦区域，该搜索脉冲响应于由信号包络检测器产生的信号和由聚焦区域检测器输出的信号而被输出。当在完成对聚焦区域的第一次接近之后进行对聚焦区域的后续接近时，通过将搜索脉冲加到在执行聚焦区域的第一接近度时计算出的偏移电压来快速定位物镜来控制致动器在聚焦区域。

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