公开(公告)号：US5729517A

公开(公告)日：1998-03-17

申请号：US740308

申请日：1996-10-28

申请人： Tsuneo Fujiwara ,  Tomiyuki Numata

发明人： Tsuneo Fujiwara ,  Tomiyuki Numata

IPC分类号： G11B20/10 ,  H04N5/76

CPC分类号： G11B20/10101 ,  G11B20/10009 ,  G11B20/10111

摘要： A clock extracting section generates a first clock synchronized with a reproducing signal, and a second clock with a frequency twice a frequency of the first clock. An AD converter quantizes the reproducing signal at timing of the second clock. A data classifier classifies the quantized data into two quantized data streams with a period of the first clock. Each equalizer equalizes the two quantized data streams to (1,1) and (1,2,1) partial response characteristics. Each branch metric arithmetic unit calculates a corresponding branch metric respectively. A synthesizer calculates a sum of them so as to generate a synthetic branch metric. An ACS circuit and a data decoding section Viterbi-decode data according to the synthetic branch metric. As a result, even if an SN ratio is lowered by increase in interference between codes and a noises at the time of recording at high density, an error of decoded data can be decreased.

摘要翻译： 时钟提取部分产生与再现信号同步的第一时钟和频率是第一时钟频率的两倍的第二时钟。 AD转换器在第二时钟的定时量化再现信号。 数据分类器将量化的数据分成具有第一时钟的周期的两个量化数据流。 每个均衡器将两个量化数据流均衡为（1,1）和（1,2,1）部分响应特性。 每个分支度量运算单元分别计算相应的分支度量。 合成器计算它们的和以便产生合成分支度量。 ACS电路和数据解码部分根据合成分支度量维特比解码数据。 结果，即使通过增加代码之间的干扰和在高密度记录时的噪声来降低SN比，可以减少解码数据的误差。

公开(公告)号：US5056076A

公开(公告)日：1991-10-08

申请号：US508538

申请日：1990-04-10

申请人： Kentaroh Tsuji ,  Hiroshi Fuji ,  Tomiyuki Numata ,  Tsuneo Fujiwara ,  Shigeo Terashima

发明人： Kentaroh Tsuji ,  Hiroshi Fuji ,  Tomiyuki Numata ,  Tsuneo Fujiwara ,  Shigeo Terashima

IPC分类号： G11B19/28 ,  G11B19/247

CPC分类号： G11B19/247

摘要： A method of controlling the rotational velocity of an information recording disk having one or more tracks in which patterns and marks are formed, the marks including at least one specific pattern having a predetermined length, which method comprises: measuring a time during which each of the patterns passes; detecting each of the marks on the basis of the values of the measured times; and controlling the rotational velocity of the disk on the basis of the measured time of the specific pattern of the detected mark, thereby making the linear velocity of the detected mark constant.

公开(公告)号：US5018120A

公开(公告)日：1991-05-21

申请号：US284669

申请日：1988-12-15

申请人： Kentaroh Tsuji ,  Tsuneo Fujiwara ,  Hiroshi Fuji ,  Shigeo Terashima ,  Tomiyuki Numata

发明人： Kentaroh Tsuji ,  Tsuneo Fujiwara ,  Hiroshi Fuji ,  Shigeo Terashima ,  Tomiyuki Numata

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/24 ,  G11B11/10 ,  G11B11/105 ,  G11B20/12 ,  G11B27/19 ,  G11B27/30

CPC分类号： G11B27/19 ,  G11B20/1251 ,  G11B27/3027 ,  G11B2020/10888 ,  G11B2220/2525 ,  G11B2220/2537

摘要： An optical disc medium indexing system having a plurality of elongated parallel tracks wherein each track contains a nonerasable index portion located in less than a single frame. The index portions are formed on the substrate of the disc by a plurality of indentations representing the absolute address of each track on the disc recorded in a multiplex format. Each index portion containing information on the mark, track number and CRC. The disc is constructed so that information may be recorded on the entire surface of the medium including the indexed portions.

公开(公告)号：US4993012A

公开(公告)日：1991-02-12

申请号：US201908

申请日：1988-06-03

申请人： Hiroshi Fuji ,  Tomiyuki Numata ,  Tsuneo Fujiwara ,  Kentaroh Tsuji

发明人： Hiroshi Fuji ,  Tomiyuki Numata ,  Tsuneo Fujiwara ,  Kentaroh Tsuji

IPC分类号： G11B11/10 ,  G11B11/105

CPC分类号： G11B11/10597

摘要： A magneto-optic record signal processing system uses a linearly polarized light beam to be projected onto a magneto-optic medium and a recorded signal is reproduced by analyzing the polarized conditions of a reflected light beam from the medium. This processing system also includes a recording face identifying device for determining the recording face of the magneto-optic record medium. To determine the recording face, an initialized area projecting device projects a light beam onto an initialized area of a magneto-optic record medium. A transducing circuit then converts a slant in a polarization plane of a reflected light beam from the initialized area into a light intensity. A photo-detector detects the light intensity outputted from the transducing means and a comparator compares the output from the photo-detector with a reference level to determine the magnetization of the recording face.

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.

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。

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。

公开(公告)号：US06282163B1

公开(公告)日：2001-08-28

申请号：US09675234

申请日：2000-09-29

申请人： Tsuneo Fujiwara

发明人： Tsuneo Fujiwara

IPC分类号： G11B700

CPC分类号： H03L7/06 ,  G11B7/004 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00745 ,  G11B20/1403 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B2220/20

摘要： Address information indicative of a certain recording/reproduction position is recorded twice (first address, second address) in an optical disk. Second phase control means makes sampling timings for digitizing the first address have optimal phases. Third phase control means makes sampling timings for digitizing the second address have optimal phases. The second and third phase control means are formed with different circuits, respectively.

摘要翻译： 表示某一记录/再现位置的地址信息被记录在光盘中两次（第一地址，第二地址）。 第二相位控制装置使得对第一地址进行数字化的采样定时具有最佳相位。 第三相位控制装置使第二地址的数字化采样定时具有最佳相位。 第二和第三相位控制装置分别形成有不同的电路。

公开(公告)号：US20110164905A1

公开(公告)日：2011-07-07

申请号：US12915283

申请日：2010-10-29

申请人： Tomohiro KONDO ,  Yasushi FUJIWARA ,  Kei ISHIDA ,  Noboru SUZUKI ,  Takuji MATSUNO ,  Tsuneo Fujiwara ,  Etsuko Fujiwara

发明人： Tomohiro KONDO ,  Yasushi FUJIWARA ,  Kei ISHIDA ,  Noboru SUZUKI ,  Takuji MATSUNO ,  Tsuneo Fujiwara ,  Etsuko Fujiwara

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/2007 ,  G03G2215/2035

摘要： A fixing device includes a heating element disposed inside a flexible fusing member, a nip member disposed to contact with a surface of the flexible fusing member and to allow the flexible fusing member to slide along the nip member, a reflecting plate for reflecting radiant heat from the heating element toward the nip member, and a backup member for nipping the flexible fusing member with the nip member. The reflecting plate includes a central reflecting portion extending along a longitudinal direction of the heating element at least in a region corresponding to along a heat generating portion of the heating element, and end reflecting portions stationarily provided on both ends of the central reflecting portion. The end reflecting portions are disposed in positions longitudinally outward of the heat generating portion and each has a reflecting surface tilted with respect to the longitudinal direction of the heating element.

摘要翻译： 定影装置包括设置在柔性定影构件内部的加热元件，设置成与柔性定影构件的表面接触并且允许柔性定影构件沿着夹持构件滑动的夹持构件，用于反射辐射热的反射板 加热元件朝向夹持部件，以及用于将柔性定影部件夹在夹持部件上的支撑部件。 反射板包括至少在与加热元件的发热部相对应的区域中沿着加热元件的纵向方向延伸的中心反射部分和固定地设置在中心反射部分两端的端部反射部分。 端部反射部分设置在发热部分的纵向外侧的位置，并且每个具有相对于加热元件的纵向方向倾斜的反射表面。

公开(公告)号：US20110158718A1

公开(公告)日：2011-06-30

申请号：US12915269

申请日：2010-10-29

申请人： Yasushi FUJIWARA ,  Tsuneo Fujiwara ,  Etsuko Fujiwara ,  Kei ISHIDA ,  Noboru SUZUKI ,  Takuji MATSUNO ,  Tomohiro KONDO ,  Yoshihiro MIYAUCHI

发明人： Yasushi FUJIWARA ,  Tsuneo Fujiwara ,  Etsuko Fujiwara ,  Kei ISHIDA ,  Noboru SUZUKI ,  Takuji MATSUNO ,  Tomohiro KONDO ,  Yoshihiro MIYAUCHI

IPC分类号： G03G15/20

CPC分类号： G03G15/2007 ,  G03G15/2053

摘要： A fixing device for thermally fixing a developer image transferred onto a recording sheet, includes: a flexible fusing member which is flexibly deformable; a heating element; a nip member disposed in such a manner as to contact with a surface of the flexible fusing member and to allow the flexible fusing member to slide along the nip member; a reflecting plate configured to reflect radiant heat from the heating element in a direction toward the nip member; a backup member configured to nip the flexible fusing member with the nip member to thereby form a nip portion for the recording sheet between the flexible fusing member and the backup member; and a stay configured to support both end portions of the nip member. The reflecting plate has at least one flange portion, and the flange portion is held and supported between the nip member and the stay.

摘要翻译： 用于热固定转印到记录片材上的显影剂图像的定影装置包括：柔性可变形的柔性定影构件; 加热元件; 以与所述柔性定影构件的表面接触的方式设置的夹持构件，并且允许所述柔性定影构件沿着所述夹持构件滑动; 反射板，被配置为在朝向所述夹持部件的方向上反射来自所述加热元件的辐射热; 支撑构件，其构造成将所述柔性定影构件与所述夹持构件夹持，从而在所述柔性定影构件和所述支撑构件之间形成用于所述记录片材的压合部; 以及构造成支撑夹持构件的两个端部的撑条。 反射板具有至少一个凸缘部分，并且凸缘部分保持并支撑在夹持部件和支架之间。