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    • 11. 发明授权
    • Driving method and apparatus for driving light source element independent of a driving mode of an optical pickup
    • 独立于光学拾取器的驱动模式驱动光源元件的驱动方法和装置
    • US06229775B1
    • 2001-05-08
    • US08225322
    • 1994-04-08
    • Jong-ho Park
    • Jong-ho Park
    • G11B70045
    • G11B7/126G11B19/04
    • A driving method and apparatus for a light source element of an optical pickup for reading and writing data from and to an optical data includes generating an error signal when a tracking error signal is higher than a first level or is lower than a second level and, if the error signal is active, supplying the light source element with a driving signal suitable for data read operations independent of whether the user selects read mode or write mode. As a result, when there is a tracking error the power of the device signal corresponds to that normally presented during a read mode, and this power is insufficient to write data onto the disc. Thus, data is not written over other desired data when an abnormal tracking error occurs.
    • 用于从光学数据读取和写入光学数据的光学拾取器的光源元件的驱动方法和装置包括当跟踪误差信号高于第一电平或低于第二电平时产生误差信号, 如果误差信号有效,则为光源元件提供适合于数据读取操作的驱动信号,而与用户是否选择读取模式或写入模式无关。 结果,当存在跟踪误差时,设备信号的功率对应于在读取模式期间通常呈现的功率,并且该功率不足以将数据写入到盘上。 因此,当出现异常跟踪错误时,数据不会写入其他所需数据。
    • 15. 发明授权
    • Method and apparatus for accurately calibrating the timing of a write onto storage media
    • 准确校准写入存储介质的时序的方法和装置
    • US06636467B1
    • 2003-10-21
    • US09608600
    • 2000-06-30
    • Carl P. Taussig
    • Carl P. Taussig
    • G11B70045
    • G11B27/24G11B20/182G11B27/3027G11B27/36G11B2220/216G11B2220/2562
    • The write-timing calibration involves (1) writing a calibration data sequence referenced to a physical timing clock (such as a wobble clock on a DVD disk), (2) measuring the timing offset or phase offset between the calibration data sequence and the clock, (3) writing a test data sequence using the same or a different recording device, (4) measuring the timing offset or phase offset between the test data and the clock, (5) comparing the timing offsets of the calibration and test data sequences, with respect to the clock, (6) iteratively adjusting the timing of the beginning of the write process, and repeating steps (3), (4) and (5) until the timing offsets are equal to within a defined tolerance, and (7) Adjusting the delay of the write driver relative to the clock by the amount determined in step (6), for equal timing offsets of the calibration and test data sequences. This process calibrates the timing of bits written on DVD formats by different recording devices so that the start position of edited data sequences is repeatably collocated with previous data sequences to a precision better than +/−0.06 &mgr;m.
    • 写定时校准包括:(1)将参考物理定时时钟(例如DVD盘上的摆动时钟)的校准数据序列写入,(2)测量校准数据序列与时钟之间的定时偏移或相位偏移 (3)使用相同或不同的记录装置写入测试数据序列,(4)测量测试数据和时钟之间的定时偏移或相位偏移,(5)比较校准和测试数据序列的定时偏移 相对于时钟,(6)迭代地调整写入处理的开始的定时,并且重复步骤(3),(4)和(5),直到定时偏移等于在限定的公差内,并且( 7)针对校准和测试数据序列的相等定时偏移,调整写入驱动器相对于时钟的延迟量(步骤(6)中确定的量)。 该过程校准由不同记录装置以DVD格式写入的位的定时,使得编辑的数据序列的开始位置与先前的数据序列重复地并置,精度优于+/- 0.06mum。