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1.发明申请公开(公告)号：US20120008478A1
公开(公告)日：2012-01-12
申请号：US13178557
申请日：2011-07-08
IPC分类号： G11B7/125
CPC分类号： G11B7/1263 , G11B7/0941
摘要： This invention provides accurate control of laser light power in a recording operation to achieve more stable recording operation. An optical disc drive in an embodiment of this invention monitors the power of laser light with a monitor diode and controls the laser light power based on the result of monitoring. The optical disc drive changes data transfer rate (recording frequency) depending on the disc radial position. The optical disc drive controls the gain of the monitor diode across the recording surface depending on the recording frequency. This control improves the accuracy in laser light power control to achieve stable recording operations by precise servo control.
摘要翻译： 本发明提供对记录操作中的激光功率的精确控制，以实现更稳定的记录操作。 本发明实施例中的光盘驱动器利用监视二极管监测激光的功率，并根据监视结果控制激光功率。 光盘驱动器根据盘的径向位置改变数据传送速率（记录频率）。 光盘驱动器根据记录频率控制监视二极管在记录表面上的增益。 该控制提高了激光功率控制的精度，通过精确的伺服控制实现稳定的记录操作。
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公开(公告)号：US20110161994A1
公开(公告)日：2011-06-30
申请号：US12960171
申请日：2010-12-03
IPC分类号： G11B7/12
CPC分类号： G11B7/005 , G11B7/00736 , G11B7/08511 , G11B7/126 , G11B2007/0013
摘要： An optical disc device comprising: a controller for reading data from an optical disc having a plurality of recording layers, wherein: the controller, in shifting a focus of the laser light from a first layer to a second layer, performs a first change that changes a setting on the high frequency signal to a predetermined value at which the high frequency signal is superimposed to suppress peak power of the drive signal if a light density of the second layer is higher than a light density of the first layer; the controller shifts the focus from the first layer to the second layer; and the controller, after the focus has been shifted, performs a second change that changes the setting on the high frequency signal to a predetermined value at which the high frequency signal is superimposed to increase the peak power of the drive signal.
摘要翻译： 一种光盘装置，包括：控制器，用于从具有多个记录层的光盘读取数据，其中：所述控制器在将激光的焦点从第一层移动到第二层时，执行改变的第一改变 如果所述第二层的光密度高于所述第一层的光密度，则将所述高频信号的设置设置为叠加所述高频信号的预定值，以抑制所述驱动信号的峰值功率; 控制器将焦点从第一层移动到第二层; 并且控制器在焦点移动之后执行将高频信号上的设置改变为叠加高频信号的预定值的第二改变，以增加驱动信号的峰值功率。
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公开(公告)号：US20110158074A1
公开(公告)日：2011-06-30
申请号：US12952416
申请日：2010-11-23
IPC分类号： G11B27/36
CPC分类号： G11B19/12
摘要： To identify the type of a loaded disc, there is provided an optical disc device, comprising: a light source driven by a drive signal with a high frequency signal superimposed; a detector for detecting return light emitted from the light source; and a controller for controlling the amplitude of the high frequency signal to be superimposed on the drive signal, the optical disc device being configured to read data from an optical disc loaded therein by a signal outputted from the detector, wherein: the controller causes the light source to irradiate the loaded optical disc with light in a condition in which a high frequency signal different from a high frequency signal for data reading is superimposed on the drive signal; and the controller identifies a type of the loaded optical disc based on the return light from the loaded optical disc.
摘要翻译： 为了识别装载的盘的类型，提供了一种光盘装置，包括：由具有叠加的高频信号的驱动信号驱动的光源; 用于检测从所述光源发射的返回光的检测器; 以及控制器，用于控制要重叠在驱动信号上的高频信号的幅度，该光盘装置被配置为通过从检测器输出的信号从装载在其中的光盘读取数据，其中：控制器使光 源，用于在与用于数据读取的高频信号不同的高频信号叠加在驱动信号上的条件下用光照射装载的光盘; 并且控制器基于来自加载的光盘的返回光来识别加载的光盘的类型。
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公开(公告)号：US20110158068A1
公开(公告)日：2011-06-30
申请号：US12952435
申请日：2010-11-23
IPC分类号： G11B20/10
CPC分类号： G11B7/1263
摘要： To determine the optimum amplitude of high frequency signal for the loaded disc with a simple configuration to achieve stable playing performance, there is provided an optical disc device comprising: a light source driven by a drive signal with a high frequency signal superimposed; a detector for detecting return light emitted from the light source; and a controller for controlling amplitude of the high frequency signal to be superimposed on the drive signal for the light source; the optical disc device being configured to read data on an optical disc loaded therein by a signal outputted from the detector, wherein the controller determines the amplitude of the high frequency signal to be superimposed on the drive signal based on asymmetry of the signal outputted from the detector.
摘要翻译： 为了以简单的配置确定用于加载的盘的高频信号的最佳幅度以实现稳定的播放性能，提供了一种光盘装置，包括：由具有叠加的高频信号的驱动信号驱动的光源; 用于检测从所述光源发射的返回光的检测器; 以及控制器，用于控制要叠加在光源的驱动信号上的高频信号的幅度; 所述光盘装置被配置为通过从所述检测器输出的信号读取装载在其中的光盘上的数据，其中所述控制器基于从所述检测器输出的信号的不对称性来确定要叠加在所述驱动信号上的高频信号的幅度 探测器。
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公开(公告)号：US20110158063A1
公开(公告)日：2011-06-30
申请号：US12952534
申请日：2010-11-23
IPC分类号： G11B7/125
CPC分类号： G11B7/1263 , G11B7/005 , G11B2007/0013
摘要： Prevention of deletion of data in an unintended recording layer of an optical disc is ensured even when servo deviation occurs while controlling data reproduction. A light source outputs a light beam with light intensity according to a driving current on which a high frequency signal is superimposed. The light beam is collected on a recording layer of an optical disc. As triggered by detection of servo deviation during data reproduction, a light intensity controller adjusts a superimposed amount of the high frequency signal in the driving current to suit to a specific recording layer with the lowest reproduction tolerance in the optical disc and thereby controls the light intensity of the light beam output from the light source.
摘要翻译： 即使在控制数据再现时发生伺服偏差，也能够确保在光盘的非预期记录层中删除数据。 光源根据叠加有高频信号的驱动电流输出光强度的光束。 光束被收集在光盘的记录层上。 由于在数据再现期间由伺服偏差的检测触发，光强度控制器调整驱动电流中的高频信号的叠加量，以适应光盘中具有最低再现容限的特定记录层，从而控制光强度 从光源输出的光束。
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6.发明申请公开(公告)号：US20120182845A1
公开(公告)日：2012-07-19
申请号：US13348706
申请日：2012-01-12
申请人： Shuichi MINAMIGUCHI
发明人： Shuichi MINAMIGUCHI
IPC分类号： G11B17/34 , G11B7/1374
CPC分类号： G11B7/1263 , G11B7/09 , G11B2007/0013
摘要： Erroneous data erasure owing to radiation of laser beam with excessive power to the recording layer of the multilayered optical disc upon servo-off while reproducing data of the disc is prevented. When detecting the servo-off based on the amplitude of the tracking error signal or the focus error signal, the laser beam power is reduced to a predetermined minimum value, and the laser beam power value is set again based on the address of the recording medium, which has been obtained later for reproduction. The laser beam power value is changed by applying an offset to the drive current or changing the target value under APC.
摘要翻译： 防止由于在再现数据的同时在伺服关闭时对多层光盘的记录层具有过大功率的激光束的辐射造成的错误数据擦除。 当基于跟踪误差信号或聚焦误差信号的振幅检测到伺服关闭时，将激光束功率降低到预定的最小值，并且基于记录介质的地址再次设置激光束功率值 ，其后来被再现。 通过对驱动电流施加偏移或者改变APC下的目标值来改变激光束功率值。
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