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11. 发明授权

US5914927A Optical disk apparatus 失效
标题翻译：光盘装置
公开(公告)号：US5914927A
公开(公告)日：1999-06-22
申请号：US21112
申请日：1998-02-10
申请人： Misao Fukuda , Hiroyuki Hishiyama , Keishi Ueno , Akira Mashimo
发明人： Misao Fukuda , Hiroyuki Hishiyama , Keishi Ueno , Akira Mashimo
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/005 , G11B7/125 , G11B20/10 , G11B20/18
CPC分类号： G11B7/126 , G11B20/10 , G11B20/1816 , G11B7/005
摘要： An optical disk apparatus having an optical head for reading and writing signals on an optical disk and a signal processing unit for performing predetermined signal processing on the signals is disclosed. The apparatus includes a first controller, a second controller, a detector, and an adjuster. The first controller controls the optical head to write a predetermined signal on a predetermined area of the optical disk with various levels of recording power of the optical head. The second controller reproduces the predetermined signal written on the predetermined area of the optical disk. The detector attempts to detect a predetermined signal pattern having a predetermined period from the reproduced signal with different slice levels. The adjuster determines a resolution of the reproduced signal in accordance with a slice level with which the signal pattern can be detected and automatically adjusts the recording power of the optical head based on the determined resolution.
摘要翻译：公开了一种具有用于在光盘上读取和写入信号的光学头的光盘装置和用于对信号进行预定信号处理的信号处理单元。该装置包括第一控制器，第二控制器，检测器和调节器。第一控制器控制光头以光学头的各种级别的记录功率在光盘的预定区域上写入预定信号。第二控制器再现写在光盘的预定区域上的预定信号。检测器尝试从具有不同切片电平的再现信号检测具有预定周期的预定信号图案。调节器根据可以检测信号图案的限幅电平来确定再现信号的分辨率，并且基于所确定的分辨率自动调节光头的记录功率。

12. 发明授权

US07983132B2 Optical disk apparatus 失效
标题翻译：光盘装置
公开(公告)号：US07983132B2
公开(公告)日：2011-07-19
申请号：US11584067
申请日：2006-10-20
申请人： Keishi Ueno
发明人： Keishi Ueno
IPC分类号： G11B20/00
CPC分类号： G11B20/10009
摘要： An optical disk apparatus for enhancing time resolution of an RF sum signal. A reproduction sum signal (a signal A+a signal D) on the leading side and a reproduction sum signal (a signal B+a signal C) on the following side, which have been output from a four-quadrant photodetection section of an optical pickup, are supplied to first and second A/D converters. The first A/D converter samples a signal in accordance with a first clock signal CLK, and the second A/D converter samples a signal in accordance with a second clock signal CLK. The first and second clock signals CLK are out of phase with each other. By means of a phase difference between the clock signals, a phase difference between the leading-side reproduction signals and the following-side reproduction signals is compensated for. The phase difference between the first and second clock signals CLK is adjusted such that the quality of a reproduction signal, such as jitter, an error rate, or the like, is optimized.
摘要翻译：一种用于增强RF和信号的时间分辨率的光盘装置。在前一侧的再现和信号（信号A +信号D）和从光学器件的四象限光电检测部分输出的后一侧的再现和信号（信号B + a信号C）拾取，被提供给第一和第二A / D转换器。第一A / D转换器根据第一时钟信号CLK对信号进行采样，并且第二A / D转换器根据第二时钟信号CLK对信号进行采样。第一和第二时钟信号CLK彼此不同相。通过时钟信号之间的相位差，补偿前端再现信号和后侧再现信号之间的相位差。调整第一和第二时钟信号CLK之间的相位差，使得优化诸如抖动，错误率等的再现信号的质量。

13. 发明申请

US20080239899A1 OPTICAL DISK DRIVE 审中-公开
标题翻译：光盘驱动器
公开(公告)号：US20080239899A1
公开(公告)日：2008-10-02
申请号：US12055211
申请日：2008-03-25
申请人： Keishi Ueno
发明人： Keishi Ueno
IPC分类号： G11B5/00
CPC分类号： G11B7/1267 , G11B7/00736
摘要： An optical disk drive sets optimum recording power responsive to recording linear speed. When data are recorded in an optical disk, data are managed for each recording unit block (RUB). An APC area is provided at the top of RUBs, and OPC is performed by use of the APC area, whereby optimum recording power responsive to recording linear speed is set. Tentative optimum recording power responsive to recording linear speed is set, and test data are written, for a try, in the APC area at recording power that is determined by increasing or decreasing the tentative optimum recording power by a trace amount. The optimum recording power is set in according with a β value obtained as a result of reproduction of the test data.
摘要翻译：光盘驱动器响应于记录线速度设置最佳记录功率。当数据记录在光盘中时，为每个记录单元块（RUB）管理数据。在RUB的顶部设置有APC区域，并且通过使用APC区域来执行OPC，由此设置响应于记录线速度的最佳记录功率。设置响应于记录线速度的暂定最佳记录功率，并且尝试在APC区域中以通过增加或减少临时最佳记录功率确定的记录功率来记录测试数据微量。根据作为测试数据再现的结果获得的β值设定最佳记录功率。

14. 发明申请

US20080239889A1 DEMODULATION CIRCUIT AND OPTICAL DISK DRIVE 有权
标题翻译：解调电路和光盘驱动器
公开(公告)号：US20080239889A1
公开(公告)日：2008-10-02
申请号：US12055205
申请日：2008-03-25
申请人： Keishi Ueno
发明人： Keishi Ueno
IPC分类号： G11B7/00
CPC分类号： G11B7/0053
摘要： A demodulation circuit accurately demodulates a wobble signal of an optical disk without being affected by a phase shift induced by crosstalk. An A-D converter subjects wobble signal reproduced from an optical disk to A-D conversion and feeds a result of conversion to a zero-crossing detection circuit. The zero-crossing detection circuit detects zero-crossing points of the wobble signal. A sinusoidal wave generation circuit generates a sinusoidal wave by means of sequentially connecting sinusoidal wave elements whose periods are each equal to a time interval between zero-crossing points. A multiplier multiplies an original wobble signal by a sinusoidal wave signal. A slicer detects an HMW-modulated portion of the wobble signal, and another slicer detects an MSK-modulated portion of the wobble signal.
摘要翻译：解调电路在不受串扰引起的相移影响的情况下对光盘的摆动信号进行精确的解调。 A-D转换器将从光盘再现的摆动信号转换为A-D转换，并将转换结果馈送到过零检测电路。过零检测电路检测摆动信号的过零点。正弦波产生电路通过顺序连接周期等于过零点之间的时间间隔的正弦波元件来产生正弦波。乘法器将原始摆动信号乘以正弦波信号。切片器检测摆动信号的HMW调制部分，另一限幅器检测摆动信号的MSK调制部分。

15. 发明申请

US20070091747A1 Optical disk apparatus 失效
标题翻译：光盘装置
公开(公告)号：US20070091747A1
公开(公告)日：2007-04-26
申请号：US11584067
申请日：2006-10-20
申请人： Keishi Ueno
发明人： Keishi Ueno
IPC分类号： G11B20/10
CPC分类号： G11B20/10009
摘要： An optical disk apparatus for enhancing time resolution of an RF sum signal. A reproduction sum signal (a signal A+a signal D) on the leading side and a reproduction sum signal (a signal B+a signal C) on the following side, which have been output from a four-quadrant photodetection section of an optical pickup, are supplied to first and second A/D converters. The first A/D converter samples a signal in accordance with a first clock signal CLK, and the second A/D converter samples a signal in accordance with a second clock signal CLK. The first and second clock signals CLK are out of phase with each other. By means of a phase difference between the clock signals, a phase difference between the leading-side reproduction signals and the following-side reproduction signals is compensated for. The phase difference between the first and second clock signals CLK is adjusted such that the quality of a reproduction signal, such as jitter, an error rate, or the like, is optimized.
摘要翻译：一种用于增强RF和信号的时间分辨率的光盘装置。在前一侧的再现和信号（信号A +信号D）和从光学器件的四象限光电检测部分输出的后一侧的再现和信号（信号B + a信号C）拾取，被提供给第一和第二A / D转换器。第一A / D转换器根据第一时钟信号CLK对信号进行采样，并且第二A / D转换器根据第二时钟信号CLK对信号进行采样。第一和第二时钟信号CLK彼此不同相。通过时钟信号之间的相位差，补偿前端再现信号和后侧再现信号之间的相位差。调整第一和第二时钟信号CLK之间的相位差，使得优化诸如抖动，错误率等的再现信号的质量。

16. 发明授权

US08018798B2 Demodulation circuit and optical disk drive 有权
标题翻译：解调电路和光盘驱动器
公开(公告)号：US08018798B2
公开(公告)日：2011-09-13
申请号：US12055205
申请日：2008-03-25
申请人： Keishi Ueno
发明人： Keishi Ueno
IPC分类号： G11B7/00
CPC分类号： G11B7/0053
摘要： A demodulation circuit accurately demodulates a wobble signal of an optical disk without being affected by a phase shift induced by crosstalk. An A-D converter subjects wobble signal reproduced from an optical disk to A-D conversion and feeds a result of conversion to a zero-crossing detection circuit. The zero-crossing detection circuit detects zero-crossing points of the wobble signal. A sinusoidal wave generation circuit generates a sinusoidal wave by means of sequentially connecting sinusoidal wave elements whose periods are each equal to a time interval between zero-crossing points. A multiplier multiplies an original wobble signal by a sinusoidal wave signal. A slicer detects an HMW-modulated portion of the wobble signal, and another slicer detects an MSK-modulated portion of the wobble signal.
摘要翻译：解调电路在不受串扰引起的相移影响的情况下对光盘的摆动信号进行精确的解调。 A-D转换器将从光盘再现的摆动信号转换为A-D转换，并将转换结果馈送到过零检测电路。过零检测电路检测摆动信号的过零点。正弦波产生电路通过顺序连接周期等于过零点之间的时间间隔的正弦波元件来产生正弦波。乘法器将原始摆动信号乘以正弦波信号。切片器检测摆动信号的HMW调制部分，另一限幅器检测摆动信号的MSK调制部分。

17. 发明申请

US20100091627A1 OPTICAL DISK INSPECTION DEVICE AND INSPECTION METHOD 失效
标题翻译：光盘检测装置及检测方法
公开(公告)号：US20100091627A1
公开(公告)日：2010-04-15
申请号：US12580095
申请日：2009-10-15
申请人： Keishi Ueno
发明人： Keishi Ueno
IPC分类号： G11B20/18
CPC分类号： G11B20/1816 , G11B2020/1823 , G11B2220/2537
摘要： There is provided an optical disk device which quickly inspects the presence or absence of a defect in an optical disk in order to ensure that it can be played back on various types of optical disk devices. A detection unit uses signals supplied from a playback unit to detect defects from each of an RF signal, a focus error signal, and a tracking error signal. A CPU stores positions of the defects in a memory. The playback unit plays back data while degrading playback conditions at the positions of the defects . The detection unit detects an error rate of the played-back data, and finally determines whether the optical disk is “OK” or “NG”.
摘要翻译：提供了一种光盘装置，其可以快速检查光盘中是否存在缺陷，以确保可以在各种类型的光盘装置上重放。检测单元使用从重放单元提供的信号来检测RF信号，聚焦误差信号和跟踪误差信号中的每一个的缺陷。 CPU将缺陷的位置存储在存储器中。播放单元在缺陷的位置降低播放条件的同时重放数据。检测单元检测重放数据的错误率，最后确定光盘是“OK”还是“NG”。

18. 发明申请

US20080074301A1 A/D CONVERSION CIRCUIT AND OPTICAL DISK DRIVE 失效
标题翻译： A / D转换电路和光盘驱动器
公开(公告)号：US20080074301A1
公开(公告)日：2008-03-27
申请号：US11859632
申请日：2007-09-21
申请人： Keishi Ueno
发明人： Keishi Ueno
IPC分类号： H03M1/12
CPC分类号： H03M1/1235 , H03M1/168 , H03M1/188 , H03M1/365 , H03M1/367 , H03M1/44
摘要： An A/D conversion circuit converts an asymmetric analogue signal into a digital signal. In an A/D conversion circuit of a parallel type, a central value of a reference voltage is adjusted by means of an average of an input analogue signal, such as a reproduced RF signal from an optical disk, or the like. The average value of the input analogue signal is detected by means of a low-pass filter (LPF). Respective comparators compare the input analogue signal with the reference voltage, and encodes a result of comparison by means of an encoder. An A/D conversion characteristic determined by voltage values from a maximum value Vref1 to an average value and another A/D conversion characteristic determined by voltage values from the average value to a minimum value Vref2 become nonlinear, thereby becoming able to address asymmetry of the input analogue signal.
摘要翻译： A / D转换电路将不对称模拟信号转换为数字信号。在并行类型的A / D转换电路中，通过诸如来自光盘的再现的RF信号之类的输入模拟信号的平均值来调整参考电压的中心值。通过低通滤波器（LPF）检测输入模拟信号的平均值。相应的比较器将输入模拟信号与参考电压进行比较，并通过编码器对比较结果进行编码。由从最大值Vref 1到平均值的电压值确定的A / D转换特性和由平均值至最小值Vref 2的电压值确定的另一个A / D转换特性变为非线性，从而变得能够解决不对称性的输入模拟信号。

19. 发明授权

US07298680B2 Optical disc apparatus 失效
标题翻译：光盘装置
公开(公告)号：US07298680B2
公开(公告)日：2007-11-20
申请号：US10901560
申请日：2004-07-29
申请人： Keishi Ueno , Kiyoshi Shidara
发明人： Keishi Ueno , Kiyoshi Shidara
IPC分类号： G11B7/00
CPC分类号： G11B7/1263
摘要： An optical disc apparatus provided with an automatic power control circuit which controls power of laser light by obtaining a difference between a value detected by a front monitor 6 and a target value individually for reproduction power and for recording power includes: a detector 7 for detecting light reflected from an optical disc, a sample-hold circuit 26 which performs on an output of the detector 7 a sample-hold operation at the timing of the reproduction power; and a microcomputer 29 which computes a reference value from the reflected light of the reproduction power at the timing just before the start of a recording operation after receiving a recording command until opening of a recording gate, and at the time of recording operation an intensity of reflected light on which a sample-hold operation is performed is compared with the reference value to correct a target value of the reproduction power.
摘要翻译：一种设置有自动功率控制电路的光盘装置，其通过获得由前监视器6检测的值和用于再现功率的个别目标值和记录功率之间的差来控制激光的功率，包括：用于检测光的检测器7 从光盘反射的采样保持电路26，其在检测器7的输出端执行在再现功率的定时处的采样保持操作; 以及微计算机29，其在接收到记录命令直到打开记录门之前的记录操作开始之前的定时从再现功率的反射光计算参考值，并且在记录操作时的强度将其上执行采样保持操作的反射光与参考值进行比较以校正再现功率的目标值。

20. 发明授权

US07054246B2 Optical disk device adapted for reliably detecting pre-pit information formed on an optical disk 失效
标题翻译：适用于可靠地检测形成在光盘上的前置凹坑信息的光盘装置
公开(公告)号：US07054246B2
公开(公告)日：2006-05-30
申请号：US10251474
申请日：2002-09-19
申请人： Keishi Ueno
发明人： Keishi Ueno
IPC分类号： G11B7/45
CPC分类号： G11B27/24 , G11B7/005 , G11B7/00745 , G11B2220/216 , G11B2220/218 , G11B2220/2562
摘要： An optical disk device which performs data recording and reproduction with regard to an optical disk on which pre-pit information for specifying an address is formed. An optical disk is irradiated with a laser beam and return light from the optical disk is detected by two photodetectors which are disposed in the radial direction. After the levels of two signals from the photodetectors are limited, a difference between these signals is calculated. Due to the limitation of the levels, noise during the recording power period is removed so that pre-pit information during the reproducing power period, namely during the space period, is extracted. Further, by calculating a difference between the two signals from the photodetectors, pre-pit information during the recording power period is extracted. It is also possible for a laser beam to be split into a main laser beam and a sub laser beam, and the sub laser beam is irradiated onto a track on which a pre-pit is formed and the pre-pit information is extracted from a signal of return light from the sub laser beam.
摘要翻译：对于形成有用于指定地址的预凹坑信息的光盘进行数据记录和再现的光盘装置。用激光束照射光盘，并且通过沿径向设置的两个光电检测器检测来自光盘的返回光。在来自光电检测器的两个信号的电平被限制之后，计算这些信号之间的差。由于电平的限制，去除记录功率周期期间的噪声，从而提取在再现功率周期期间，即在空间周期期间的预凹陷信息。此外，通过计算来自光电检测器的两个信号之间的差异，提取记录功率周期期间的预凹陷信息。也可以将激光束分割为主激光束和副激光束，并且将子激光束照射到其上形成有预制坑的轨道上，并且从来自副激光束的返回光信号。

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