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    Multi-level information recording apparatus, multi-level information recording method, multi-level information recording medium and multi-level information recording-reproducing apparatus
    22.
    发明授权
    Multi-level information recording apparatus, multi-level information recording method, multi-level information recording medium and multi-level information recording-reproducing apparatus 失效
    多级信息记录装置，多级信息记录方法，多级信息记录介质和多级信息记录再现装置

    公开(公告)号：US07126897B2

    公开(公告)日：2006-10-24

    申请号：US10386532

    申请日：2003-03-13

    申请人： Kohji Takeuchi ,  Akihiko Shimizu

    发明人： Kohji Takeuchi ,  Akihiko Shimizu

    IPC分类号： G11B5/09 ,  G11B10/10

    CPC分类号： G11B7/24088 ,  G11B7/00456 ,  G11B7/005 ,  G11B7/00736 ,  G11B7/261

    摘要： A multi-level information recording-reproducing apparatus can accurately determine multi-level information even if recording density is increased. A multi-level information recording-reproducing apparatus radiates a laser beam to an information recording medium by switching a radiation energy level of the laser beam in a multi-level fashion and records a recorded mark in the information recording medium. The multi-level information recording-reproducing apparatus reproduces a multi-level data sequence recorded as a test pattern in the information recording medium, sets a reproduction signal level of a recorded mark based on an immediately-before cell located immediately before a cell to be reproduced, and corrects the radiation energy level of the laser beam so that the reproduction signal level can have a separate distribution from a distribution of another reproduction signal level.

    摘要翻译： 即使增加记录密度，多级信息记录 - 再现装置也可以准确地确定多级信息。 多级信息记录再现装置通过以多级方式切换激光束的辐射能量水平将激光束照射到信息记录介质，并将记录标记记录在信息记录介质中。 多级信息记录再现装置再现在信息记录介质中记录为测试图形的多级数据序列，基于紧邻单元格之前的紧邻单元格设置记录标记的再现信号电平 再现和校正激光束的辐射能量水平，使得再现信号电平可以具有与另一再现信号电平的分布分开的分布。

    Data processing method, circuit, and apparatus with increased accuracy
    24.
    发明授权
    Data processing method, circuit, and apparatus with increased accuracy 失效
    数据处理方法，电路和设备精度提高

    公开(公告)号：US06888479B2

    公开(公告)日：2005-05-03

    申请号：US10247552

    申请日：2002-09-20

    申请人： Koubun Sakagami ,  Kazunori Takatsu ,  Akihiko Shimizu ,  Yuichi Kadokawa

    发明人： Koubun Sakagami ,  Kazunori Takatsu ,  Akihiko Shimizu ,  Yuichi Kadokawa

    IPC分类号： G11B20/14 ,  H03M5/14 ,  H03J3/00 ,  H03J5/24

    CPC分类号： H03M5/145 ,  G11B20/1426

    摘要： In a data processing method of converting (n×m−1)-bit data to multi-level data of m symbols of n bits per symbol, n and m being integers satisfying n≧2 and m≧2, respectively, the m symbols each comprising n-bit data are arranged in m columns in an n×m matrix, with a value of each of the m symbols being set to an even or odd number, by creating the m symbols each including (n−1)-bit data of the (n×m−1)-bit data, arranging the m symbols in the m columns so that the {(n−1)×m}-bit data is arranged in upper-side {(n−1)×m} bits of the n×m matrix, and converting the remaining (m−1)-bit data of the (n×m−1)-bit data to m-bit data so that the m-bit data is arranged in a row in lower-side m bits of the n×m matrix.

    摘要翻译： 在将（n×m-1）比特数据转换为每符号n比特的m个符号的多级数据的数据处理方法中，n和m分别满足n> = 2和m> = 2的整数，m个符号 每个包括n比特数据的每个包括（n-1）比特数据的m个符号，其中每个m个符号的值被设置为偶数或奇数， （n×m-1）位数据，将m个符号排列在m列中，使得{（n-1）×m×位数据排列在n×m的上侧{（n-1）×m}位 矩阵，并且将（n×m-1）位数据的剩余（m-1）位数据转换为m位数据，使得m位数据被排列成n×m的下侧m位 矩阵。

    Optical information recording medium and a method of tracking servo for optical information recording medium
    25.
    发明授权
    Optical information recording medium and a method of tracking servo for optical information recording medium 失效
    光信息记录介质和跟踪光信息记录介质的伺服方法

    公开(公告)号：US5926446A

    公开(公告)日：1999-07-20

    申请号：US815712

    申请日：1997-03-12

    申请人： Akihiko Shimizu

    发明人： Akihiko Shimizu

    IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/26 ,  G11B7/30

    CPC分类号： G11B7/24085 ,  G11B7/00718 ,  G11B7/0079 ,  G11B7/0938 ,  G11B7/0945 ,  G11B7/24079 ,  G11B7/0901 ,  G11B7/0941 ,  G11B7/261

    摘要： The invention provides an optical information recording medium capable of optionally setting the capacitance of the ROM and keeping the physical continuousness in the ROM track and the RAM track. The medium is the optical information recording medium in the land/groove recording system in which the information is recorded both in the convex groove track called land L and in the concave groove track called groove G, and it includes commonly in a sheet of medium a ROM area constructed with the pre-pit row previously formed on the basic substrate and a RAM area capable of being additionally written by the user. The track pitch of the pre-pit row in the ROM area is equal to that of the groove. The RAM area exists on the plain portion between the just adjacent pre-pit rows in the ROM area and on both portions of the land and the groove.

    摘要翻译： 本发明提供了一种能够可选地设置ROM的电容并保持物理连续性在ROM轨道和RAM轨道中的光学信息记录介质。 该介质是槽脊/凹槽记录系统中的光学信息记录介质，其中信息被记录在被称为焊盘L的凹槽轨道和称为凹槽G的凹槽轨道中，并且其通常包括在介质片材 ROM区域，其预先形成在基本衬底上的预制凹坑行以及能够被用户另外写入的RAM区域。 ROM区域中的预凹坑行的轨道间距等于凹槽的轨迹间距。 RAM区域存在于ROM区域中恰好相邻的预凹坑行之间的平坦部分上，并且在纹理区域和凹槽的两个部分上。

    Scroll compressor having a check valve received in a stationary scroll member recess
    28.
    发明授权
    Scroll compressor having a check valve received in a stationary scroll member recess 失效
    具有容纳在固定涡旋构件凹部中的止回阀的涡旋式压缩机

    公开(公告)号：US5597296A

    公开(公告)日：1997-01-28

    申请号：US498139

    申请日：1995-07-05

    申请人： Teruyuki Akazawa ,  Sadao Kawahara ,  Akihiko Shimizu ,  Yoshifumi Abe

    发明人： Teruyuki Akazawa ,  Sadao Kawahara ,  Akihiko Shimizu ,  Yoshifumi Abe

    IPC分类号： F04C29/12 ,  F04C18/02 ,  F04C29/00 ,  F04C18/04 ,  F16K15/16

    CPC分类号： F04C18/0215 ,  Y10T137/7892

    摘要： A scroll compressor includes stationary and orbiting scroll members in engagement with each other. The stationary scroll member includes a stationary end plate having first and second end surfaces opposite to each other, a stationary scroll wrap protruding axially from the first end surface of the stationary end plate, a discharge port defined in the stationary end plate in the proximity of a center thereof, and a recess defined in the stationary end plate on the second surface thereof. A check valve is received in the recess so as to open or close the discharge port. The recess has a shape substantially identical to the shape of the check valve and also has a depth greater than a maximum lift of the check valve.

    摘要翻译： 涡旋压缩机包括彼此接合的固定和绕动涡旋件。 固定涡旋构件包括具有彼此相对的第一和第二端面的固定端板，从静止端板的第一端面轴向突出的固定涡旋涡卷，限定在固定端板附近的排出口 其中心，以及限定在其第二表面上的固定端板中的凹部。 止回阀被容纳在凹部中以打开或关闭排出口。 凹部的形状基本上与止回阀的形状相同，并且还具有大于止回阀的最大升程的深度。

    Optical disk with identification phase-encoded area
    30.
    发明授权
    Optical disk with identification phase-encoded area 失效
    具有识别相位编码区域的光盘

    公开(公告)号：US5220556A

    公开(公告)日：1993-06-15

    申请号：US603480

    申请日：1990-10-25

    申请人： Akihiko Shimizu

    发明人： Akihiko Shimizu

    IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/013 ,  G11B7/095 ,  G11B7/24

    CPC分类号： G11B7/24 ,  G11B7/0037 ,  G11B7/24085 ,  G11B7/095

    摘要： An optical disk having a recording area and an identification phase-encoded part (PEP) area with pits from which system data on the optical disk is reproduced without tracking, in which when the track pitch for the PEP area and the track pitch for the recording area are the same, the relationship between the track pitch P in the PEP area and the width W of the pits measured at a height in the pits of half the pit depth D is set in the range of 0.4P.ltoreq.W.ltoreq.0.6P; and when the track pitch for the PEP area and the track pitch for the recording area are different, the relationship between the track pitch P in the PEP area and the width W of the pits measured at a height in the pit of half the pit depth D is set in the range of P.ltoreq.2.5W.

    摘要翻译： 具有记录区域和具有凹坑的识别相位编码部分（PEP）区域的光盘，其中不再跟踪在光盘上再现系统数据，其中当PEP区域的轨道间距和用于记录的轨道间距 面积相同，PEP区域中的轨道间距P与在凹坑深度D的一半凹坑中的高度处测量的凹坑的宽度W之间的关系被设定在0.4P≤W< = 0.6P; 并且当PEP区域的轨道间距和记录区域的轨道间距不同时，PEP区域中的轨道间距P与在凹坑深度的一半的坑的高度处测量的凹坑的宽度W之间的关系 D设定在P <= 2.5W的范围内。