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1. 发明授权

US5107472A Track access and laser beam alignment system for an optical recording and reproduction apparatus 失效
标题翻译：用于光学记录和再现装置的轨道访问和激光束对准系统
公开(公告)号：US5107472A
公开(公告)日：1992-04-21
申请号：US376412
申请日：1989-07-05
申请人： Tsuneo Fujiwara , Masaru Nomura , Toshihisa Deguchi , Kunio Kojima , Takeshi Yamaguchi
发明人： Tsuneo Fujiwara , Masaru Nomura , Toshihisa Deguchi , Kunio Kojima , Takeshi Yamaguchi
IPC分类号： G11B7/0033 , G11B7/085 , G11B7/14 , G11B11/105
CPC分类号： G11B11/10563 , G11B7/0033 , G11B7/085 , G11B7/14
摘要： A track access operation system for an optical recording and reproducing apparatus using a medium having a plurality of guide grooves and ID sections utilized for identifying a particular guide groove. The intensity of reflected light and transmitted light from each of a plurality of light beams projected on the recording medium is monitored for determining the location of the beam on the disk. The system is designed such that at least either the plurality of light beams or the plurality of ID sections of the guide grooves are so arranged such that more than half of the light beams or more than half of the ID sections do not overlap in a parallel direction along the guide grooves whereby the number of light beams simultaneously projected on the ID sections is limited to less than half of the total number of light beams projected on the recording medium. Accordingly, even when the collection of light beams move in a perpendicular direction to the guide grooves, the number of pulses in the pulse signal is not influenced by the ID signals but coincident with the number of the guiding grooves through which the light beams have actually passed. With use of the optical memory system having such an arrangement, an accurate measurement of light beam movement is obtained resulting in high accuracy of access operations.

2. 发明授权

US4954903A Digital signal reproduction apparatus for reading magneto-optical disks 失效
标题翻译：用于读取磁光盘的数字信号再现装置
公开(公告)号：US4954903A
公开(公告)日：1990-09-04
申请号：US245771
申请日：1988-09-19
申请人： Hiroshi Fuji , Takeshi Yamaguchi , Kunio Kojima , Toshihisa Deguchi , Shigeo Terashima , Tsuneo Fujiwara
发明人： Hiroshi Fuji , Takeshi Yamaguchi , Kunio Kojima , Toshihisa Deguchi , Shigeo Terashima , Tsuneo Fujiwara
IPC分类号： G11B20/10
CPC分类号： G11B20/10009
摘要： A digital signal reproduction apparatus includes a first differential circuit for differentiating a reproduction signal reproduced from a recording medium. This differential circuit outputs a first order differential signal and second differential circuit differentiates the first order differential signal of the reproduction signal and outputs a second order differential signal. A comparator compares the second order differential signal with a predetermined level to produce a window signal. A peak detecting circuit detects zero-cross points in the first order differential signal and outputs a peak detecting signal. A gate gates the peak detecting signal with the window signal to output a reproduction data signal.

3. 发明授权

US5166838A Digital signal reproduction apparatus for reading magneto-optical discs 失效
标题翻译：用于读取磁光盘的数字信号再现装置
公开(公告)号：US5166838A
公开(公告)日：1992-11-24
申请号：US498710
申请日：1990-03-26
申请人： Hiroshi Fuji , Takeshi Yamaguchi , Kunio Kojima , Toshihisa Deguchi , Shigeo Terashima , Tsuneo Fujiwara
发明人： Hiroshi Fuji , Takeshi Yamaguchi , Kunio Kojima , Toshihisa Deguchi , Shigeo Terashima , Tsuneo Fujiwara
IPC分类号： G11B20/10
CPC分类号： G11B20/10009
摘要： A digital signal reproduction apparatus includes a first differential circuit for differentiating a reproduction signal reproduced from a recording medium. This differential circuit outputs a first order differential signal. A second differential circuit differentiates the first order differential signal of the reproduction signal and outputs a second order differential signal. A comparator compares the second order differential signal with a predetermined level to produce a window signal. A peak detecting circuit detects zero-cross points in the first order differential signal and outputs a peak detecting signal. A gate gates the peak detecting signal with the window signal to output a reproduction data signal.
摘要翻译：数字信号再现装置包括用于区分从记录介质再现的再现信号的第一差分电路。该差分电路输出一阶差分信号。第二差分电路区分再现信号的一阶差分信号并输出二阶微分信号。比较器将二阶差分信号与预定电平进行比较以产生窗口信号。峰值检测电路检测一阶差分信号中的零交叉点，并输出峰值检测信号。门通过窗口信号对峰值检测信号进行门极输出再现数据信号。

4. 发明授权

US5010540A Apparatus for recording and reproducing information on and from an optical disk 失效
标题翻译：用于在光盘上记录和再现信息的装置
公开(公告)号：US5010540A
公开(公告)日：1991-04-23
申请号：US225892
申请日：1988-07-29
申请人： Hiroshi Fuji , Tsuneo Fujiwara , Takashi Iwaki , Tomiyuki Numata , Kentaroh Tsuji , Shigemi Maeda , Takeshi Yamaguchi , Kunio Kojima , Toshihisa Deguchi , Shigeo Terashima
发明人： Hiroshi Fuji , Tsuneo Fujiwara , Takashi Iwaki , Tomiyuki Numata , Kentaroh Tsuji , Shigemi Maeda , Takeshi Yamaguchi , Kunio Kojima , Toshihisa Deguchi , Shigeo Terashima
IPC分类号： G11B19/247
CPC分类号： G11B19/247
摘要： An apparatus for recording and reproducing information on and from an optical disk includes a first control for producing a first control signal for controlling the rotational speed of a rotational driving apparatus, on the basis of the detected radial position; a judging apparatus which judges whether or not the reproduced signals are reproduced from a recorded region of the optical disk; a second control for producing a second control signal for controlling the rotational speed of the rotational driving apparatus, on the basis of the signals reproduced from the disk; and a switch apparatus which switches the circuit so that the rotational driving apparatus is controlled by the first control signal when the reproduced signals are not reproduced from a non-recorded region, and controlled by the second control signal when the reproduced signals are reproduced from a recorded region.

5. 发明授权

US5048004A Optical recording medium recording and reproducing device 失效
标题翻译：光记录介质记录和再现装置
公开(公告)号：US5048004A
公开(公告)日：1991-09-10
申请号：US340454
申请日：1989-04-19
申请人： Toshihisa Deguchi , Takeshi Yamaguchi , Shigemi Maeda , Takashi Iwaki , Tsuneo Fujiwara , Shigeo Terashima
发明人： Toshihisa Deguchi , Takeshi Yamaguchi , Shigemi Maeda , Takashi Iwaki , Tsuneo Fujiwara , Shigeo Terashima
IPC分类号： G11B20/10 , G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/0055 , G11B7/013 , G11B20/18 , G11B27/00
CPC分类号： G11B20/1883 , G11B7/0045 , G11B7/013 , G11B2220/20
摘要： A recording and reproducing device providing control data recording area on erasable type optical recording medium wherein control data are recorded thereof, characterized in that there is provided a control data recording area forming device for forming control data recording areas having more than two control recording blocks which in turn have more than one recording unit. The control data can be recorded independently. A control data updating device records new control data in the control data recording blocks which were the ones not previously being updated with control data, thereby allowing this device to minimize damage caused by electrical power failure.

6. 发明授权

US4868922A Data modulation/demodulation system utilizing demodulation clocks that differ in phase 失效
标题翻译：利用不同相位的解调时钟的数据调制/解调系统
公开(公告)号：US4868922A
公开(公告)日：1989-09-19
申请号：US8964
申请日：1987-01-30
申请人： Kentaro Tsuji , Tsuneo Fujiwara , Shigemi Maeda , Taeshi Yamaguchi , Toshihisa Deguchi , Shozou Kobayashi
发明人： Kentaro Tsuji , Tsuneo Fujiwara , Shigemi Maeda , Taeshi Yamaguchi , Toshihisa Deguchi , Shozou Kobayashi
IPC分类号： G11B20/12 , G11B20/10 , G11B20/14 , G11B20/18 , G11B27/30 , H03M5/14
CPC分类号： G11B20/12 , G11B20/1403 , G11B20/1426 , G11B27/3027 , H03M5/145 , G11B2220/20
摘要： A data modulation/demodulation system reproducing data that is divided and recorded in a plurality of blocks on a recording medium. The data modulation/demodulation system utilizes the steps of modulating the data by adding specified data bit patterns to the data bits of each block and reproducing the data which have been obtained by adding specified code bit patterns. The bit rows are independently demodulated by demodulation clocks which differ in phase. The demodulation bit pattern of the above code bit pattern which was added at the time of recording and the bit pattern which was demodulated by the different modulation clocks are compared with each other to determine which data is wrong. The correct demodulated data is selected according to this comparison and transmitted.
摘要翻译：数据调制/解调系统再现被分割并记录在记录介质上的多个块中的数据。数据调制/解调系统采用以下步骤：通过向每个块的数据位添加指定的数据位模式并再现通过添加指定的码位模式而获得的数据来调制数据。位行由相位不同的解调时钟独立地解调。将在记录时添加的上述码位模式的解调位模式和由不同调制时钟解调的位模式进行比较，判定哪个数据错误。根据该比较选择正确的解调数据并进行传输。

7. 发明授权

US4785252A Waveform processing circuit 失效
标题翻译：波形处理电路
公开(公告)号：US4785252A
公开(公告)日：1988-11-15
申请号：US916644
申请日：1986-10-08
申请人： Hiroshi Fuji , Takashi Iwaki , Tsuneo Fujiwara , Toshihisa Deguchi , Shozou Kobayashi
发明人： Hiroshi Fuji , Takashi Iwaki , Tsuneo Fujiwara , Toshihisa Deguchi , Shozou Kobayashi
IPC分类号： G11B5/035 , G11B20/10 , H03K5/00 , H03B1/00
CPC分类号： G11B5/035 , G11B20/10009
摘要： A waveform processing circuit includes a switching circuit having first and second inputs and one output. The first input receives head portions and data portions contained in a reproduced signal from an optical head. The second input receives a level signal representing the level of the head portion or the level of the signal carrying the head portion. The switching circuit is switches between a first state in which the first input and the output are connected, and a second state in which the second input and the output are connected. A control signal producer produces a first control pulse indicating the presence of the data portion. The first control pulse is applied to the switching circuit for actuating the switching circuit to establish the first state when the first control pulse is present, and to establish the second state when the first control pulse is not present, so that the switching circuit continuously produces the signal having a level within the range of the head portion. Thus, no abrupt change caused by transient phenomena will be observed in a high pass filter connected to the switching circuit.
摘要翻译：波形处理电路包括具有第一和第二输入和一个输出的开关电路。第一输入接收来自光学头的再现信号中包含的头部和数据部分。第二输入接收表示头部的电平的电平信号或承载头部的信号的电平。切换电路是在连接第一输入和输出的第一状态与第二输入和输出连接的第二状态之间进行切换。控制信号产生器产生指示数据部分的存在的第一控制脉冲。当存在第一控制脉冲时，第一控制脉冲被施加到用于致动切换电路以建立第一状态的开关电路，并且当不存在第一控制脉冲时建立第二状态，使得开关电路连续产生该信号具有在头部的范围内的电平。因此，在连接到开关电路的高通滤波器中不会观察到由瞬态现象引起的突然变化。

8. 发明授权

US5675569A Readback circuit for an optical information reading and recording apparatus 失效
标题翻译：用于光学信息读取和记录装置的回读电路
公开(公告)号：US5675569A
公开(公告)日：1997-10-07
申请号：US567429
申请日：1995-12-05
申请人： Takeshi Yamaguchi , Tsuneo Fujiwara , Hiroshige Hirajima
发明人： Takeshi Yamaguchi , Tsuneo Fujiwara , Hiroshige Hirajima
IPC分类号： G11B7/00 , G11B7/005 , G11B11/105 , G11B20/10 , G11B20/14 , G11B20/18 , G11B20/22
CPC分类号： G11B20/10101 , G11B20/10009 , G11B20/22 , G11B11/10515 , G11B7/005
摘要： A recorded signal reproduction circuit in an optical disc information reading and recording apparatus converts a recorded signal recovered from an optical disc to PR (1, 2, 1) characteristics through a equalizer circuit, digitizes it through an A/D converter and at the same time also generates a clock signal synchronized in phase with the equalizer circuit output signal by using a binary edcoder circuit and a PLL circuit. This clock signal is then provided to an A/D converter as the sampling clock. The A/D converter output signal is then decoded to the original channel bit stream based on the clock signal. Because the equalizer circuit output signal is provided to both the binary encoder/PLL circuit and the A/D converter together, additional circuity for converting signals into a binary series of pulses is unnecessary and reduction of circuit scale is possible. Moreover, in case of a change-over in the frequency characteristics of the equalizer circuit, due to a change in recording and reproduction frequency, the change-over will not affect the phase relationship between an input signal to the A/D converter and a sampling clock. In addition, it becomes simple to adjust this phase relation.
摘要翻译：光盘信息读取和记录装置中的记录信号再现电路通过均衡器电路将从光盘恢复的记录信号转换为PR（1,2,1）特性，通过A / D转换器将其数字化时间还通过使用二进制编码器电路和PLL电路产生与均衡器电路输出信号同相的时钟信号。该时钟信号随后作为采样时钟提供给A / D转换器。然后，A / D转换器输出信号基于时钟信号被解码为原始通道位流。由于均衡器电路输出信号同时提供给二进制编码器/ PLL电路和A / D转换器，所以用于将信号转换成二进制脉冲串的附加电路是不必要的，并且可以减小电路规模。此外，在均衡器电路的频率特性的转换的情况下，由于记录和再现频率的变化，转换不会影响到A / D转换器的输入信号与A / D转换器之间的相位关系采样时钟。此外，调整该相位关系变得简单。

9. 发明申请

US20110150543A1 Fixing Device 有权
标题翻译：固定装置
公开(公告)号：US20110150543A1
公开(公告)日：2011-06-23
申请号：US12915206
申请日：2010-10-29
申请人： Yasushi FUJIWARA , Kei ISHIDA , Noboru SUZUKI , Yoshihiro MIYAUCHI , Tomohiro KONDO , Tsuneo Fujiwara , Etsuko Fujiwara
发明人： Yasushi FUJIWARA , Kei ISHIDA , Noboru SUZUKI , Yoshihiro MIYAUCHI , Tomohiro KONDO , Tsuneo Fujiwara , Etsuko Fujiwara
IPC分类号： G03G15/20
CPC分类号： G03G15/2064 , G03G15/2053
摘要： In a fixing device, a nip plate is disposed on an inner surface of a tubular flexible fusing member which is flexibly deformable, and configured to be heated by a heating element disposed inside the fusing member. The fusing member is nipped between the nip plate and a backup member to form a nip portion. First and second portions of the nip plate which are located in positions upstream and downstream, respectively, with respect to a recording sheet conveyance direction and to be supported by a stay are each configured to be a flat plate extending along the recording sheet conveyance direction. A central portion between the first and second portions of the nip plate is in a position shifted from those of the first and second portions in a direction perpendicular to flat surfaces of the first and second portions.
摘要翻译：在定影装置中，夹持板设置在柔性可变形的管状柔性定影构件的内表面上，并且被配置为由设置在定影构件内部的加热元件加热。定影构件夹在夹持板和支撑构件之间以形成夹持部。位于相对于记录纸传送方向上游和下游的位置并且由支撑件支撑的夹持板的第一和第二部分均被构造为沿着记录纸张传送方向延伸的平板。夹持板的第一部分和第二部分之间的中心部分在垂直于第一和第二部分的平坦表面的方向上处于与第一部分和第二部分的位置偏离的位置。

10. 发明授权

US07174501B2 Apparatus and method of correcting offset 有权
标题翻译：校正偏移的装置和方法
公开(公告)号：US07174501B2
公开(公告)日：2007-02-06
申请号：US10686472
申请日：2003-10-14
申请人： Tsuneo Fujiwara
发明人： Tsuneo Fujiwara
IPC分类号： H03M13/03
CPC分类号： G11B20/10009 , G11B20/10101 , G11B20/18 , G11B2020/1863 , H03M13/3738 , H03M13/41
摘要： An apparatus for correcting offset includes an optical pickup converting data recorded on an optical disc to an electrical signal; an AD converter quantizing a reproduction signal for each clock in synchronization with a bit period of the reproduction signal and sequentially outputting the signal as a quantized data column for each clock; an adder adding an offset adjustment amount to the quantized data column serving as an input signal; a Viterbi decoder performing Viterbi decoding on the signal after offset adjustment for binarization; and an offset correction value operating unit calculating the offset adjustment amount so that a value obtained by dividing a standard deviation of path metric difference between a survivor path and another path merged into the survivor path in the Viterbi decoder by an average of the path metric difference is minimized.
摘要翻译：用于校正偏移的装置包括将记录在光盘上的数据转换为电信号的光学拾取器; AD转换器与再现信号的位周期同步地量化每个时钟的再现信号，并且将每个时钟的量化数据列顺序地输出; 对作为输入信号的量化数据列添加偏移调整量的加法器; 维特比解码器对用于二值化的偏移调整之后的信号执行维特比解码; 以及偏移校正值操作单元，其计算偏移调整量，使得通过将幸存路径和维特比译码器中的幸存路径中的另一路径之间的路径度量差的标准偏差除以路径度量差的平均值而获得的值被最小化。

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