公开(公告)号：US5898656A

公开(公告)日：1999-04-27

申请号：US918989

申请日：1997-08-27

申请人： Taizo Takiguchi

发明人： Taizo Takiguchi

IPC分类号： G11B7/0045 ,  G11B7/125 ,  G11B7/00

CPC分类号： G11B7/126 ,  G11B7/0045 ,  G11B7/00451

摘要： A driving device and a calibration method for an ablation write-once type optical disc in which the recording light volume can be calibrated accurately without using an over-power for positively recording data on the ablation write-once type optical disc. A playback output by an optical head 3 for recording/reproducing data by scanning an ablation write-once type optical disc 1 with a laser light beam is supplied to an optimum recording light volume decision unit 4. A light recording data controller 6 controls a laser driving controller 5 for controlling the laser light volume of an optical head 3 for recording two different recording patterns with different repetition periods with various recording light volumes. The optimum recording light volume decision unit 4 detects the asymmetry amount from the playback outputs of the two different recording patterns and determines an optimum recording light volume of the ablation write-once type optical disc 1 based on the asymmetry amounts at the various recording light volumes.

摘要翻译： 一种用于消融一次写入型光盘的驱动装置和校准方法，其中可以准确地校准记录光量而不使用用于在消融一次写入型光盘上积极记录数据的过功率。 用于通过用激光束扫描消融一次​​写入型光盘1来记录/再现数据的光学头3的重放输出被提供给最佳记录光量判定单元4.光记录数据控制器6控制激光 驱动控制器5，用于控制用于记录具有各种记录光量的具有不同重复周期的两种不同记录图案的光学头3的激光体积。 最佳记录光量判定单元4根据两种不同记录图形的重放输出检测不对称量，并且基于各种记录光量的不对称量确定消融一次写入型光盘1的最佳记录光量 。

公开(公告)号：US06556525B1

公开(公告)日：2003-04-29

申请号：US09621296

申请日：2000-07-20

申请人： Taizo Takiguchi

发明人： Taizo Takiguchi

IPC分类号： G11B700

CPC分类号： G11B19/12 ,  G11B7/0045

摘要： With an arrangement having functions of detecting an unrecorded area by comparing a reproduction signal level obtained by conducting reproduction of a disk-shaped recording medium with a threshold, the setting of this threshold is performed by performing reproduction regarding an adjustment area serving as an unrecorded area on the disk-shaped recording medium while varying the adjusting threshold. Then, the threshold to be actually used for detection of unrecorded areas is set based on the comparison results between the adjusting threshold and the reproduction RF signal. Thus, a threshold appropriate for each device is automatically set for example, regardless of conditions such as differences in noise levels superimposed on reproduction signals, from one device to another. Thus, an appropriate threshold for blank checks can be set regardless of irregularities in parts from one device to another (i.e., regardless of differences in the noise levels superimposed on the reproduction RF signals from one device to another), thereby improving the reliability of blank checking.

摘要翻译： 通过将通过进行盘状记录介质的再现获得的再现信号水平与阈值进行比较来检测未记录区域的功能的布置，通过对作为未记录区域的调整区域进行再现来执行该阈值的设定 在盘形记录介质上，同时改变调节阈值。 然后，基于调整阈值和再现RF信号之间的比较结果来设定实际用于检测未记录区域的阈值。 因此，不管诸如叠加在再现信号上的噪声电平的差异等因素从一个设备到另一个设备，例如，自动设置适合每个设备的阈值。 因此，无论从一个设备到另一个设备的部件的不规则性（即，不同于叠加在从一个设备到另一个设备的再现RF信号的噪声水平的差异），可以设置用于空白检查的适当阈值，从而提高空白的可靠性 检查。

公开(公告)号：US06392971B1

公开(公告)日：2002-05-21

申请号：US09268982

申请日：1999-03-16

申请人： Taizo Takiguchi ,  Yoshimasa Sato ,  Koso Kashima ,  Kenji Yamazaki

发明人： Taizo Takiguchi ,  Yoshimasa Sato ,  Koso Kashima ,  Kenji Yamazaki

IPC分类号： G11B700

CPC分类号： G11B7/094 ,  G11B7/0945 ,  G11B11/10576

摘要： Test pattern data is recorded on a track of the optical disc, and the other pattern data is recorded on the neighboring track. A focus bias value providing the minimum jitter amount when the test pattern data is reproduced with varying the focus bias, is obtained. Just focusing condition is attained by the focus servo using the focus bias. When the test pattern data is reproduced, the data of these neighboring track is also reproduced simultaneously because the pattern data of the type different from the test pattern data is also recorded on the neighboring track. Particularly, under the defocusing condition, crosstalk amount becomes larger because the beam shape is distorted. With reference to jitter amount, such a mistake that the defocusing condition is erroneously determined as the just focusing condition can be eliminated. That is, the focus servo signal providing the accurate just focusing condition can be obtained.

摘要翻译： 测试图案数据被记录在光盘的轨道上，而另一个图案数据被记录在相邻的轨道上。 获得当通过改变聚焦偏压再现测试图案数据时提供最小抖动量的聚焦偏置值。 通过使用聚焦偏置的聚焦伺服来达到聚焦条件。 当再现测试图案数据时，由于与测试图案数据不同的类型的图案数据也被记录在相邻的轨道上，所以这些相邻轨迹的数据也被同时再现。 特别地，在散焦条件下，由于光束形状失真，串扰量变大。 关于抖动量，可以消除将散焦条件错误地确定为刚刚聚焦条件的错误。 也就是说，可以获得提供准确的聚焦条件的聚焦伺服信号。

公开(公告)号：US5982718A

公开(公告)日：1999-11-09

申请号：US37487

申请日：1998-03-10

申请人： Taizo Takiguchi

发明人： Taizo Takiguchi

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B11/105 ,  G11B20/12 ,  G11B20/18 ,  G11B27/30 ,  G11B27/36

CPC分类号： G11B27/3027 ,  G11B20/1879 ,  G11B27/36 ,  G11B11/10595 ,  G11B20/1217 ,  G11B20/1883 ,  G11B20/1889 ,  G11B2220/20 ,  G11B7/0045 ,  G11B7/005

摘要： In a disc drive device upon recording, the writing of data is executed and thereafter the reading of data is executed to verify, i.e., make a check as to whether the written data can be properly read out. In this case, the gain of a gain control amplifier for amplifying a reproduced signal is set so as to be lower than usual and a window width of a window comparator is set so as to be greater than usual. An error rate in a bubble shaped region in which the amplitude of the reproduced signal is small, is rendered high. Thus, verify can be taken as NG when recording power falls within the bubble region. Verify is determined based on RESYNC bytes added every predetermined data intervals, i.e., detected information about patterns for data having the minimum and maximum inversion intervals as well as on error information. As a result, verify can be reliably taken as NG even when the recording power is placed in a region between the bubble shaped region and a normal region. Thus, the accuracy of verify can be enhanced.

摘要翻译： 在记录中的盘驱动装置中，执行数据的写入，然后执行数据的读取以验证是否可以正确读出写入的数据。 在这种情况下，用于放大再现信号的增益控制放大器的增益被设置为低于通常，并且窗口比较器的窗口宽度被设置为大于通常。 在再现信号的振幅小的气泡形区域中的误差率变高。 因此，当记录功率落在气泡区域内时，可以将验证视为NG。 基于根据每个预定数据间隔添加的RESYNC字节确定验证，即关于具有最小和最大反转间隔的数据的模式的检测信息以及错误信息。 结果，即使当记录功率被放置在气泡形区域和正常区域之间的区域中时，也可以将验证可靠地取为NG。 因此，可以提高验证的准确性。

公开(公告)号：US5715228A

公开(公告)日：1998-02-03

申请号：US755321

申请日：1996-11-22

申请人： Taizo Takiguchi

发明人： Taizo Takiguchi

IPC分类号： G11B7/0045 ,  G11B7/125 ,  G11B19/04 ,  G11B20/14 ,  G11B7/00

CPC分类号： G11B7/126 ,  G11B19/04 ,  G11B20/1426 ,  G11B7/0045

摘要： In an optical recording apparatus which records data by stabilizing the duration of laser beam emission, a controller produces a clock signal which is synchronous to source data to be recorded, and modulates the data into modulated data. A phase comparator, oscillator and frequency demultiplier produce a signal which is synchronous to the modulated data, has a constant duty-cycle and has a period that is 1/Kb time (Kb is an integer greater than or equal to 2) the data period of the shortest modulated data. Based on the data and signal, laser emission pattern signals are produced. Signal generators produce reference signals in response to control signals from a microcomputer. Switches are controlled by the pattern signals to conduct reference signals selectively. A laser diode is driven by a signal which is the sum of the selected reference signals, and the laser power is controlled accordingly. The constant duty-cycle of the signal prevents the fluctuation of the duration of laser beam emission.

摘要翻译： 在通过稳定激光束发射的持续时间来记录数据的光学记录装置中，控制器产生与待记录的源数据同步的时钟信号，并将数据调制成调制数据。 相位比较器，振荡器和分频器产生与调制数据同步的信号，具有恒定的占空比，周期为1 / Kb时间（Kb为大于或等于2的整数）数据周期 的最短调制数据。 基于数据和信号，产生激光发射模式信号。 信号发生器响应于来自微型计算机的控制信号产生参考信号。 开关由图案信号控制，以选择性地传导参考信号。 激光二极管由所选择的参考信号之和的信号驱动，相应地控制激光功率。 信号的恒定占空比可防止激光束发射持续时间的波动。