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1. 发明申请

US20090245056A1 OPTICAL DISK DEVICE AND CONTROL METHOD 审中-公开
标题翻译：光盘设备及控制方法
公开(公告)号：US20090245056A1
公开(公告)日：2009-10-01
申请号：US12415840
申请日：2009-03-31
申请人： Akihiko DOI , Katsumi IZAWA
发明人： Akihiko DOI , Katsumi IZAWA
IPC分类号： G11B20/18
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10222 , G11B20/10481
摘要： According to one embodiment, an optical disk device includes a semiconductor laser, a circuit which generates a timing signal to determine a recording pulse timing, a circuit which sets a magnitude of a current for the laser, a circuit which switches the magnitude of the current according to the timing signal, a generation circuit which generates a correction signal from the timing signal to correct response characteristics of a recording pulse, a circuit which synthesizes the correction signal and signals obtained as the switch result to determine the magnitude of the current, and a circuit which feeds the current to the laser according to the synthesis result. The generation circuit extracts high-frequency components from the signals obtained as the switch result and the signal generated by the synthesis circuit, and switches a frequency and a signal gain of each of the components, in accordance with recording pulse conditions.
摘要翻译：根据一个实施例，光盘装置包括半导体激光器，产生定时信号以确定记录脉冲定时的电路，设置激光器电流大小的电路，切换电流大小的电路根据定时信号，产生电路，其从定时信号产生校正信号以校正记录脉冲的响应特性，合成校正信号的电路和作为开关结果获得的信号以确定电流的大小;以及根据合成结果将电流馈送到激光器的电路。生成电路根据作为开关结果获得的信号和由合成电路产生的信号提取高频分量，并且根据记录脉冲条件切换每个分量的频率和信号增益。

2. 发明申请

US20090296546A1 OPTICAL DISC APPARATUS 有权
标题翻译：光盘设备
公开(公告)号：US20090296546A1
公开(公告)日：2009-12-03
申请号：US12537742
申请日：2009-08-07
申请人： Akihiko DOI
发明人： Akihiko DOI
IPC分类号： G11B20/10
CPC分类号： G11B7/0906 , G11B2007/0006
摘要： An optical disc apparatus includes an emitter which emits a laser beam to a optical disc, a divided photodetector including a first dived portion and a second dived portion disposed in a light path of the reflected beam from the optical disc, and producing a first photodetector signal and a second photodetector signal, a phase difference detector which produces a phase difference signal from a phase difference between the first and the second photodetector signals, an integrator which produces a integral signal from a integration of the phase difference signal, a tracking controller configure to perform tracking control based on the integral signal, and a limiter which limits a signal to be supplied from the divided photodetector to the phase difference detector or a signal to be supplied from the phase difference detector to the integrator based on a detection status of a signal detected by the dived photodetector.
摘要翻译：一种光盘装置，包括向光盘发射激光束的发射器，包括设置在来自光盘的反射光束的光路中的第一凹陷部分和第二凹陷部分的分割光电检测器，并且产生第一光电检测器信号以及第二光电检测器信号，相位差检测器，其从第一和第二光电检测器信号之间的相位差产生相位差信号;积分器，其从相位差信号的积分产生积分信号，跟踪控制器配置为基于积分信号执行跟踪控制，以及限制器，其将从分割光电检测器提供给相位差检测器的信号或从相位差检测器提供给积分器的信号基于信号的检测状态由分光光度计检测。

3. 发明申请

US20070076545A1 OPTICAL DISC APPARATUS 失效
标题翻译：光盘设备
公开(公告)号：US20070076545A1
公开(公告)日：2007-04-05
申请号：US11464076
申请日：2006-08-11
申请人： Akihiko DOI
发明人： Akihiko DOI
IPC分类号： G11B7/00
CPC分类号： G11B7/0906 , G11B2007/0006
摘要： An optical disc apparatus includes an emitter which emits a laser beam to a optical disc, a divided photodetector including a first dived portion and a second dived portion disposed in a light path of the reflected beam from the optical disc, and producing a first photodetector signal and a second photodetector signal, a phase difference detector which produces a phase difference signal from a phase difference between the first and the second photodetector signals, an integrator which produces a integral signal from a integration of the phase difference signal, a tracking controller configure to perform tracking control based on the integral signal, and a limiter which limits a signal to be supplied from the divided photodetector to the phase difference detector or a signal to be supplied from the phase difference detector to the integrator based on a detection status of a signal detected by the dived photodetector.
摘要翻译：一种光盘装置，包括向光盘发射激光束的发射器，包括设置在来自光盘的反射光束的光路中的第一凹陷部分和第二凹陷部分的分割光电检测器，并且产生第一光电检测器信号以及第二光电检测器信号，相位差检测器，其从第一和第二光电检测器信号之间的相位差产生相位差信号;积分器，其从相位差信号的积分产生积分信号，跟踪控制器配置为基于积分信号执行跟踪控制，以及限制器，其将从分割光电检测器提供给相位差检测器的信号或从相位差检测器提供给积分器的信号基于信号的检测状态由分光光度计检测。

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