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    • 97. 发明授权
    • Information recording apparatus
    • 信息记录装置
    • US06292448B1
    • 2001-09-18
    • US09360903
    • 1999-07-26
    • Masayoshi YoshidaYoshitaka Shimoda
    • Masayoshi YoshidaYoshitaka Shimoda
    • G11B700
    • G11B7/126G11B7/0045G11B7/24085
    • Before information is recorded onto an information record medium by irradiating a light beam, a test signal is recorded for each of a plurality of unit test record regions with a plurality of different record powers. Then, the test signal recorded in each of the unit test record regions is reproduced, and further an optimal record power for the light beam is selected on the basis of a condition of the reproduced test signal. The information recording apparatus is provided with: a re-writable memory device for storing power set values to obtain the plurality of different record powers respectively, in response to location information which identifies respective one of the unit test record regions; a recording device for recording the test signal in the test record region on the basis of a constant record clock signal; a location information generating device for generating the location information at a cycle corresponding to a record time for each of the unit test record regions; a record controlling device for reading out the power set value stored in the re-writable memory device in accordance with the generated location information and then outputting it to the recording device; a defect detecting device for detecting a defect in respective one of the unit test record regions, in which a recording operation is performed; and a power set value storing device for storing the power set value, which is read out in accordance with one location information when the defect is detected, into the re-writable memory device such that the stored power set value corresponds to another location information.
    • 在通过照射光束将信息记录到信息记录介质之前,针对具有多个不同记录功率的多个单元测试记录区域中的每一个记录测试信号。 然后,记录在每个单元测试记录区域中的测试信号被再现,并且还根据再现的测试信号的条件选择光束的最佳记录功率。 信息记录装置具有:响应于识别单元测试记录区域中的相应一个的位置信息,分别存储功率设定值以获得多个不同记录功率的可重写存储装置; 记录装置,用于根据恒定的记录时钟信号在测试记录区中记录测试信号; 位置信息生成装置,用于以对应于每个单位测试记录区域的记录时间的周期生成位置信息; 记录控制装置,用于根据生成的位置信息读出存储在可重写存储装置中的功率设定值,然后将其输出到记录装置; 用于检测执行记录操作的单元测试记录区域中的一个的缺陷的缺陷检测装置; 以及功率设定值存储装置,用于存储在检测到缺陷时根据一个位置信息读出的功率设定值,使得存储的功率设定值对应于另一个位置信息。
    • 99. 发明授权
    • Pre-pit detecting device and information recording apparatus employing
the same
    • 预坑检测装置以及使用该凹坑的信息记录装置
    • US5930222A
    • 1999-07-27
    • US55255
    • 1998-04-06
    • Masayoshi YoshidaKenji MitoToshio Suzuki
    • Masayoshi YoshidaKenji MitoToshio Suzuki
    • G06F7/22G11B7/00G11B7/0045G11B7/005G11B7/007G11B19/12G11B27/19G11B27/24G11B27/30G11B11/03G11B11/12
    • G11B27/24G11B19/12G11B7/0053G11B2220/218G11B2220/2562G11B27/3027G11B7/00745
    • The irradiation device irradiates, at the time of recording main information, a first light beam having a first power and a second light beam having a second power on the pre-pits in a time-divisional manner. The light receiving device receives a reflected light of the first light beam from the pre-pits to produce a first light-receipt signal, and receives a reflected light of the second light beam from the pre-pits to produce a second light-receipt signal. The first detector detects the pre-pits based on the first light-receipt signal to produce a first detection signal, and the second detector detects the pre-pits based on the second light-receipt signal to produce a second detection signal. Then, the processor produces a logical sum of the first detection signal and the second detection signal to output a pre-pit detection signal. Therefore, the pre-pits can be correctly detected in both cases where the first light beam and the second light beam is irradiated, and all pre-pits on the storage medium may be detected to obtain the recording information.
    • 在记录主信息时,照射装置以时分方式照射具有第一功率的第一光束和具有第二功率的第二光束。 光接收装置从预凹坑接收第一光束的反射光以产生第一光接收信号,并且从预凹坑接收第二光束的反射光以产生第二光接收信号 。 第一检测器基于第一光接收信号检测预凹坑以产生第一检测信号,并且第二检测器基于第二光接收信号检测预凹坑以产生第二检测信号。 然后,处理器产生第一检测信号和第二检测信号的逻辑和,以输出预凹坑检测信号。 因此,可以在照射第一光束和第二光束的两种情况下正确地检测预凹坑,并且可以检测存储介质上的所有预凹坑以获得记录信息。
    • 100. 发明授权
    • Rotation control apparatus and rotation control method for disk type
information record medium
    • 盘式信息记录介质的旋转控制装置及旋转控制方法
    • US5774437A
    • 1998-06-30
    • US798056
    • 1997-02-11
    • Masayoshi Yoshida
    • Masayoshi Yoshida
    • G11B19/28G11B7/007G11B19/24G11B7/00
    • G11B19/24
    • On an information record medium, a plurality of synchronization signals are recorded by a predetermined record interval such that a record interval of two consecutive synchronization signals is transiently changed from the predetermined record interval. A method of controlling a rotation of a motor to rotate the information record medium is provided with the steps of: detecting the synchronization signals one after another from the information record medium; generating a standard signal having a predetermined cycle which is set in advance in correspondence with the predetermined record interval; detecting a changing amount of an interval, at which the synchronization signals are detected by the synchronization signals detecting steps, from the predetermined record interval; and controlling the rotation of the motor to be in a predetermined rotation condition corresponding to the predetermined cycle by canceling the changing amount detected by the changing amount detecting step, on the basis of the standard signal generated by the standard signal generating step and the changing amount detected by the changing amount detecting step.
    • 在信息记录介质上,以预定的记录间隔记录多个同步信号,使得两个连续同步信号的记录间隔从预定的记录间隔瞬时改变。 提供了一种控制电动机旋转信息记录介质的方法,其特征在于包括以下步骤:从信息记录介质一个接一个地检测同步信号; 产生具有与预定记录间隔对应地预先设定的预定周期的标准信号; 从所述预定记录间隔检测由所述同步信号检测步骤检测到所述同步信号的间隔的变化量; 根据标准信号生成步骤生成的标准信号和变化量,根据由变化量检测步骤检测到的变化量,将电动机的旋转控制在与规定的周期对应的规定的旋转状态 通过变化量检测步骤检测。