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    • 4. 发明授权
    • Optical disc drive and optical disc controller
    • 光盘驱动器和光盘控制器
    • US06925037B2
    • 2005-08-02
    • US10386612
    • 2003-03-12
    • Takashi KishimotoTakeharu YamamotoYoshihiro KandaJun Kikuchi
    • Takashi KishimotoTakeharu YamamotoYoshihiro KandaJun Kikuchi
    • G11B7/085G11B7/00
    • G11B7/08529G11B7/08541
    • An optical disc drive includes: an optical head with an actuator and a photodetector; a tracking driver outputting a drive signal to the actuator; a first tracking error signal generator for generating a first tracking error signal based on an output signal of the photodetector; first and second lens position control sections for respectively outputting first and second lens position control signals to the tracking driver; and a selector for selectively supplying the first tracking error signal to the first or second lens position control section according to a moving velocity of the optical head during a seek operation. The first lens position control signal is obtained by extracting signal components, of which the frequencies are equal to or lower than a predetermined frequency, from the first tracking error signal. The second lens position control signal is obtained by extracting DC components of the first tracking error signal at on-track points thereof.
    • 光盘驱动器包括:具有致动器和光电检测器的光学头; 向所述致动器输出驱动信号的跟踪驱动器; 第一跟踪误差信号发生器,用于基于光电检测器的输出信号产生第一跟踪误差信号; 第一和第二透镜位置控制部分,用于分别向跟踪驱动器输出第一和第二透镜位置控制信号; 以及选择器,用于根据拾取操作期间光头的移动速度,选择性地将第一跟踪误差信号提供给第一或第二透镜位置控制部。 通过从第一跟踪误差信号中提取频率等于或低于预定频率的信号分量来获得第一透镜位置控制信号。 第二透镜位置控制信号通过在其轨迹点上提取第一跟踪误差信号的DC分量来获得。
    • 10. 发明授权
    • Integrated circuit, optical disk device, and signal processing method
    • 集成电路,光盘装置和信号处理方法
    • US07898912B2
    • 2011-03-01
    • US12416449
    • 2009-04-01
    • Jun Kikuchi
    • Jun Kikuchi
    • G11B7/00
    • G11B20/10203G11B2220/2537
    • Before initiation of tracking control, an optical disk device performs an offset amount obtaining operation, in which a difference between a middle value of the amplitude of a tracking error signal and a predetermined reference value is obtained as an offset amount. After the initiation of the tracking control, the optical disk device initiates an attenuation operation, in which an offset amount attenuation section attenuates the offset amount obtained by the offset amount obtaining operation to obtain an attenuated offset amount, while initiating, with an initial value being 0, an estimation operation, in which an observer estimates the offset amount according to a tracking driving signal to obtain an estimated offset amount. The optical disk device corrects the tracking error signal by using the attenuated offset amount obtained by the attenuation operation and the estimated offset amount obtained by the estimation operation.
    • 在开始跟踪控制之前,光盘装置执行偏移量获取操作,其中获得跟踪误差信号的幅度的中间值与预定参考值之间的差作为偏移量。 在跟踪控制开始之后,光盘装置开始衰减操作,其中偏移量衰减部分通过偏移量获得操作来获得的偏移量衰减以获得衰减偏移量,同时启动初始值为 0,其中观察者根据跟踪驱动信号估计偏移量以获得估计偏移量的估计操作。 光盘装置通过使用通过衰减操作获得的衰减偏移量和通过估计操作获得的估计偏移量来校正跟踪误差信号。