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    • 12. 发明申请
    • OPC-performing method restudying optical source drive characteristics after OPC recording and OPC measurement and optical recording/reproducing apparatus using the same
    • OPC执行方法恢复OPC记录和OPC测量之后的光源驱动特性以及使用其的光学记录/再现装置
    • US20060274616A1
    • 2006-12-07
    • US11444470
    • 2006-06-01
    • Jin-woo YuTatsuhiro OtsukaJong-lin Ko
    • Jin-woo YuTatsuhiro OtsukaJong-lin Ko
    • G11B7/12
    • G11B7/1267
    • An optical recording/reproducing apparatus and an OPC-performing method are provided for restudying drive characteristics of an optical source after performing OPC test recording and OPC measurement to ensure accurate optimum power control (OPC) for recording data on an optical disc, particularly, when the drive characteristics vary according to temperature changes of the optical source. The OPC-performing method comprises performing OPC recording as test recording for OPC and OPC measurement as measurement of an OPC recording state; performing a power analysis of drive characteristics of an optical source, and obtaining optical source drive characteristics after the OPC recording and the OPC measurement; and performing OPC calculation for determination of an optimum optical source drive level as an optical source drive level for enabling optimum beams of optimum recording power to be emitted from the optical source, based on the OPC recording state and the optical source drive characteristics obtained. As a result, an optimum optical source drive level can be accurately obtained, since the OPC calculation is performed based on the optical source drive characteristics after the temperature of the optical source has increased.
    • 提供光学记录/再现装置和OPC执行方法,用于在执行OPC测试记录和OPC测量之后重新调整光源的驱动特性,以确保用于在光盘上记录数据的精确的最佳功率控制(OPC),特别是当 驱动特性根据光源的温度变化而变化。 OPC执行方法包括作为OPC记录状态的测量执行OPC记录作为用于OPC和OPC测量的测试记录; 执行光源的驱动特性的功率分析,以及在OPC记录和OPC测量之后获得光源驱动特性; 并且基于所获得的OPC记录状态和光源驱动特性,执行OPC计算以确定最佳光源驱动电平作为光源驱动电平,以使得能够从光源发射最佳记录功率的最佳光束。 结果,由于在光源的温度升高之后基于光源驱动特性进行OPC计算,所以可以精确地获得最佳的光源驱动电平。
    • 14. 发明授权
    • Method and circuit for detecting playback signal which is compensated for time delay
    • 用于检测补偿时间延迟的重放信号的方法和电路
    • US07009921B1
    • 2006-03-07
    • US09563430
    • 2000-05-03
    • Tatsuhiro OtsukaSeong-sin JooChong-sam ChungYoung-man AhnIn-sik ParkHea-jung SuhByung-in MaByoung-ho Choi
    • Tatsuhiro OtsukaSeong-sin JooChong-sam ChungYoung-man AhnIn-sik ParkHea-jung SuhByung-in MaByoung-ho Choi
    • G11B20/18
    • G11B20/10009G11B7/005
    • A method and circuit for providing a playback signal which is compensated for time delay. The circuit includes a time delay compensator for detecting a time difference between outputs of a photodetector and temporally matching part of the outputs of the photodetector and another part of the outputs of the photodetector, between which the time difference occurs, to compensate for time delay between different outputs of the photodetector, and an operational unit for summing the part of the outputs of the photodetector, which is compensated for the time delay, and the other part of the outputs of the photodetector to provide a playback signal. Accordingly, the circuit compensates for the time delay between the outputs of the photodetector, thereby increasing the degree of modulation of the data playback signal. In addition, the circuit maximumly suppresses the distortion or degradation of the signal and minimizes the occurrence of errors in the playback signal, thereby improving the reliability of the playback signal.
    • 一种用于提供补偿时间延迟的重放信号的方法和电路。 该电路包括时间延迟补偿器,用于检测光电检测器的输出之间的时间差,并且在时间上匹配部分光电检测器的输出和光电检测器的输出的另一部分之间产生时差,以补偿光电检测器之间的时间延迟 光检测器的不同输出和用于对补偿了时间延迟的光电检测器的输出的一部分进行求和以及光电检测器的输出的另一部分以提供重放信号的操作单元。 因此,电路补偿光电检测器的输出之间的时间延迟,从而增加数据重放信号的调制程度。 此外,电路最大限度地抑制信号的失真或劣化,并且使重放信号中的错误的发生最小化,从而提高重放信号的可靠性。
    • 17. 发明授权
    • Apparatus and method for recording/reproducing holographic data and holographic data storage medium
    • 用于记录/再现全息数据和全息数据存储介质的装置和方法
    • US08149676B2
    • 2012-04-03
    • US12109619
    • 2008-04-25
    • Taek-seong JeongJae-cheol BaeTatsuhiro OtsukaHyun-soo ParkYoung-min Cheong
    • Taek-seong JeongJae-cheol BaeTatsuhiro OtsukaHyun-soo ParkYoung-min Cheong
    • G11B7/00
    • G11B7/139G11B7/0065G11B7/1374
    • A method and apparatus for recording and/or reproducing holographic data and a holographic information storage medium, wherein the apparatus for recording and/or reproducing holographic information includes an optical pickup emitting light onto a holographic information storage medium and receiving the emitted light. The optical pickup includes: a light source unit emitting a signal beam and a reference beam in a recording mode; and a focusing optical system focusing the signal beam and the reference beam on one focal point in the holographic information storage medium so that information can be recorded by using an interference pattern formed along a depth direction of the holographic information storage medium in the vicinity of the focal point, wherein the numerical aperture of the focusing optical system for the signal beam is different from the numerical aperture of the focusing optical system for the reference beam.
    • 一种用于记录和/或再现全息数据和全息信息存储介质的方法和装置,其中用于记录和/或再现全息信息的装置包括将光发送到全息信息存储介质上并接收发射的光的光学拾取器。 光拾取器包括:以记录模式发射信号光束和参考光束的光源单元; 以及将信号光束和参考光束聚焦在全息信息存储介质中的一个焦点上的聚焦光学系统,以便可以通过使用沿着全息信息存储介质的深度方向形成的干涉图案来记录信息 焦点,其中用于信号束的聚焦光学系统的数值孔径与用于参考光束的聚焦光学系统的数值孔径不同。
    • 18. 发明申请
    • Apparatus and method to control temperature of heating roller used in fusing device of image forming apparatus
    • 控制图像形成装置的定影装置中使用的加热辊的温度的装置和方法
    • US20110280601A1
    • 2011-11-17
    • US13064634
    • 2011-04-05
    • Dae-hwan KimKeon KukJin-han KimJun-o KimTatsuhiro OtsukaYoung-dae Ko
    • Dae-hwan KimKeon KukJin-han KimJun-o KimTatsuhiro OtsukaYoung-dae Ko
    • G03G15/20
    • G03G15/2039G03G15/2042
    • The apparatus includes a heating roller that generates heat for melting toner attached to a printing medium; a first induction coil that is disposed outside the heating roller and heats the heating roller by using induced current generated according to current flowing through the first induction coil; two second induction coils that are disposed at upper portions of both ends of the first induction coil and heat the heating roller by using induced current generated according to current flowing through the two second induction coils; a power supply unit that supplies current to the first induction coil and the two second induction coils; and a control unit that controls the power supply unit to supply current flowing in the same direction or different directions to the first induction coil and the second induction coils according to the size of paper fed into the heating roller.
    • 该装置包括加热辊,该加热辊产生用于熔化附着在打印介质上的调色剂的热量; 第一感应线圈,其设置在所述加热辊的外侧,并使用根据流过所述第一感应线圈的电流产生的感应电流加热所述加热辊; 两个第二感应线圈,其设置在第一感应线圈的两端的上部,并且通过使用根据流经两个第二感应线圈的电流产生的感应电流加热加热辊; 电源单元,其向所述第一感应线圈和所述两个第二感应线圈提供电流; 以及控制单元,其控制所述电源单元根据供给到所述加热辊中的纸张的尺寸,向与所述第一感应线圈和所述第二感应线圈相同的方向或不同方向供给电流。