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    • 51. 发明授权
    • Apparatus for recording/reproducing information data in two dimensional
format
    • 用于以二维格式记录/再现信息数据的装置
    • US5657308A
    • 1997-08-12
    • US557319
    • 1995-11-14
    • Takeshi MaedaAtsushi SaitoHiroshi Ide
    • Takeshi MaedaAtsushi SaitoHiroshi Ide
    • G11B7/004G11B7/013G11B7/09G11B7/13G11B7/135G11B7/14G11B11/105G11B20/14G11B7/00
    • B82Y10/00G11B11/10502G11B11/10545G11B11/10584G11B7/004G11B7/0943G11B7/133G11B7/1365G11B20/1496G11B7/013G11B7/13G11B7/14G11B7/24088
    • In an information recording/reproducing apparatus constructed of: a buffer for storing therein consecutive recording data in a unit of two dimensional conversion; a coding device for converting the consecutive recording data into a two-dimensional data arrangement arranged by "n" lines and "m" columns corresponding to said unit of data; a recording device for subdividing said two-dimensional data arrangement arranged by "n" lines and "m" columns so as to be read out, and for controlling "m" pieces of light sources in accordance with these data series; and an optical apparatus for converging luminous fluxes from said "m" pieces of light sources so as to form "m" pieces of spots on a disk plane, the recording data is recorded on the disk plane as an optically distringuishable pit group having two-dimensionally extended areas arranged by "n" lines and "m" columns. During a reproducing operation, the reflected light is detected by "m" pieces of detectors; "m" columns of one-dimensional data series are generated from the reflected light detected by these detectors in a generator; and also consecutive data is reproduced from the two dimensional data arranged by "n" lines and "m" columns in a decoder.
    • 一种信息记录/再现装置,由以下部分构成:用于以二维转换为单位在其中存储连续的记录数据的缓冲器; 编码装置,用于将连续的记录数据转换为由对应于所述数据单元的“n”行和“m”列排列的二维数据排列; 用于细分由“n”行和“m”列布置的所述二维数据排列以便被读出的记录装置,并且用于根据这些数据序列控制“m”个光源; 以及用于会聚来自所述“m”个光源的光通量以便在盘平面上形成“m”个点的光学装置,所述记录数据被记录在盘平面上,作为具有二维图形的光学可区分凹坑组, 由“n”行和“m”列排列的三维延伸区域。 在再现操作期间,由“m”个检测器检测反射光; 从发生器中由这些检测器检测到的反射光产生“m”列的一维数据序列; 并且从解码器中由“n”行和“m”列排列的二维数据再现连续的数据。
    • 54. 发明授权
    • Light modulation method for forming a mark in magneto-optical recording
system
    • 用于在磁光记录系统中形成标记的光调制方法
    • US5457666A
    • 1995-10-10
    • US114062
    • 1993-08-31
    • Tsuyoshi TodaHiroshi IdeFumiyoshi KirinoTakeshi MaedaHiroyuki TsuchinagaToshimitsu KakuSeiichi MitaKazuo Shigematsu
    • Tsuyoshi TodaHiroshi IdeFumiyoshi KirinoTakeshi MaedaHiroyuki TsuchinagaToshimitsu KakuSeiichi MitaKazuo Shigematsu
    • G11B7/00G11B7/0045G11B7/0055G11B7/006G11B7/125G11B11/10G11B11/105G11B7/24
    • G11B7/126G11B11/10506G11B11/1053G11B7/0045G11B7/006
    • A magneto-optical disk recording control method using the mark length recording method wherein the marks and gap regions between marks are recorded on the surface of the disk by maintaining a constant temperature distribution during the recording. The laser is driven to a non-recording level in gap regions between marks that exceed a base recording level used for reproduction of the marks. When a mark is recorded, the laser power is increased to a recording power level and after the mark has been recorded, the laser power level is reduced to the base power level, followed by being raised to the gap recording level. Control of the laser is performed by superposing a plurality of pulse trains that are synchronized with respect to a clock having a cycle T. The pulse trains are derived from the code train to be recorded and have pulses with a duration that is an integral multiple of (1/2)T. If the pulse width of the recording code train exceeds 2T, then the laser is controlled to reach a first power level in accordance with pulses of a first pulse train, be reduced to the gap recording level and then raised to a second power level in accordance with a second recording pulse train to maintain the temperature distribution constant during the recording of the mark. For the recording of longer marks, the laser is controlled to vary between the second power level and the gap recording level.
    • 一种使用标记长度记录方法的磁光盘记录控制方法,其中通过在记录期间保持恒定的温度分布将标记之间的标记和间隙区域记录在盘的表面上。 在超过用于再现标记的基本记录水平的标记之间的间隙区域中激光被驱动到非记录水平。 当记录标记时,激光功率增加到记录功率水平,并且在记录标记之后,激光功率水平降低到基本功率水平,然后升高到间隙记录水平。 通过叠加相对于具有周期T的时钟同步的多个脉冲串来执行激光的控制。脉冲序列是从要被记录的代码序列导出的,具有持续时间为整数倍的脉冲 (1/2)T。 如果记录代码串的脉冲宽度超过2T,则根据第一脉冲序列的脉冲将激光器控制到达到第一功率电平,减小到间隙记录电平,然后依次升高到第二功率电平 具有第二记录脉冲串,以在记录记录期间保持温度分布恒定。 为了记录更长的标记,激光器被控制在第二功率电平和间隙记录电平之间变化。