公开(公告)号：US08004945B2

公开(公告)日：2011-08-23

申请号：US12282439

申请日：2007-03-13

申请人： Harumitsu Miyashita ,  Kohei Nakata ,  Hiroshi Ueda ,  Youichi Ogura

发明人： Harumitsu Miyashita ,  Kohei Nakata ,  Hiroshi Ueda ,  Youichi Ogura

IPC分类号： G11B7/00

CPC分类号： G11B20/10009 ,  G11B7/0053 ,  G11B7/08523 ,  G11B2220/2537

摘要： An information reproduction device according to the present invention is a device for accessing a recording medium having first address information and second address information recorded thereon. The first address information is represented by a shape formed on the recording medium in advance; and the second address information is recorded on the recording medium together with data. The information reproduction device includes a head section for accessing the recording medium to generate a reproduction signal; a first detection section for detecting the first address information from the reproduction signal; a second detection section for detecting the second address information from the reproduction signal; and a control section for, based on a detection result of either the first detection section or the second detection section which detected the address information first, controlling an access after the detection to the recording medium.

摘要翻译： 根据本发明的信息再现装置是用于访问其上记录有第一地址信息和第二地址信息的记录介质的装置。 第一地址信息由形成在记录介质上的形状预先表示; 并且第二地址信息与数据一起被记录在记录介质上。 信息再现装置包括用于访问记录介质以产生再现信号的头部分; 第一检测部分，用于从再现信号中检测第一地址信息; 第二检测部分，用于从再现信号中检测第二地址信息; 以及控制部分，用于基于首先检测到地址信息的第一检测部分或第二检测部分的检测结果，控制检测到记录介质之后的访问。

公开(公告)号：US20110177323A1

公开(公告)日：2011-07-21

申请号：US13076471

申请日：2011-03-31

申请人： Kohei Nakata ,  Michio Endo ,  Kentaro Doguchi ,  Shigeru Fujino

发明人： Kohei Nakata ,  Michio Endo ,  Kentaro Doguchi ,  Shigeru Fujino

IPC分类号： C04B35/50 ,  B32B18/00

CPC分类号： C04B35/44 ,  C04B35/62665 ,  C04B35/62813 ,  C04B35/62884 ,  C04B35/62897 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/528 ,  C04B2235/5436 ,  C04B2235/604 ,  C04B2235/656 ,  C04B2235/6567 ,  C04B2235/6581 ,  C04B2235/9646 ,  G02B1/00 ,  Y10T428/252 ,  Y10T428/2993

摘要： Provided is an optical element, which is formed by vacuum-sintering a molded body of ceramic particles having an average particle diameter of 1 μm or more and 10 μm or less and including LnxAlyO|x+y|×1.5 (Ln represents a rare-earth element, x represents 1≦x≦10, and y represents 1≦y≦5). Ln preferably includes at least one kind selected from La, Gd, Yb, and Lu. The optical element preferably has a refractive index of 1.85 or more and 2.06 μm or less, and an Abbe number of 48 or more and 65 or less. The optical element having optical properties of high refractive index and low dispersibility is obtained.

摘要翻译： 提供一种光学元件，其通过真空烧结平均粒径为1μm以上且10μm以下的陶瓷粒子的成型体而形成的光学元件，其包含LnxAlyO | x + y |×1.5（Ln表示稀土元素， x元素，x表示1＆nlE; x＆nlE; 10，y表示1＆nlE; y＆nlE; 5）。 Ln优选包括选自La，Gd，Yb和Lu中的至少一种。 光学元件的折射率优选为1.85以上且2.06μm以下，阿贝数为48以上且65以下。 获得具有高折射率和低分散性的光学性质的光学元件。

公开(公告)号：US20110096652A1

公开(公告)日：2011-04-28

申请号：US12959756

申请日：2010-12-03

申请人： Harumitsu MIYASHITA ,  Kohei NAKATA

发明人： Harumitsu MIYASHITA ,  Kohei NAKATA

IPC分类号： G11B20/18

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/10222 ,  G11B20/10296 ,  G11B20/10481 ,  G11B2220/2541

摘要： A waveform shaping portion receives a digital reproduced signal generated from an analog reproduced signal reproduced from an information recording medium and shapes the waveform of the digital reproduced signal. A maximum likelihood decoding portion applies maximum likelihood decoding to the digital reproduced signal in the shaped waveform and generates a binarized signal indicating the result of the maximum likelihood decoding. A phase detection portion extracts, during the maximum likelihood decoding/a phase error using state transition patterns having only a single zero cross point among differential metrics at a plurality of merging points at which a set of paths branched from a given state merges. A synchronization detection portion generates a reproduction clock signal using the phase error that has been detected and brings the digital reproduced signal into synchronization with the reproduction clock signal that has been generated. This configuration makes it possible to generate a reproduction clock signal in a stable manner.

摘要翻译： 波形整形部分接收从信息记录介质再现的模拟再现信号产生的数字再生信号，并对数字再现信号的波形进行整形。 最大似然解码部分对成形波形中的数字再现信号应用最大似然解码，并生成指示最大似然解码结果的二值化信号。 相位检测部分在使用从给定状态分支的一组路径合并的多个合并点处的差分度量中仅具有单个零交叉点的状态转换模式时，在最大似然解码/相位误差期间提取相位误差。 同步检测部分使用已经检测到的相位误差来产生再现时钟信号，并使数字再现信号与已经产生的再现时钟信号同步。 该配置使得可以以稳定的方式产生再现时钟信号。

公开(公告)号：US07898933B2

公开(公告)日：2011-03-01

申请号：US12881338

申请日：2010-09-14

申请人： Kohei Nakata ,  Harumitsu Miyashita

发明人： Kohei Nakata ,  Harumitsu Miyashita

IPC分类号： G11B7/24

CPC分类号： G11B7/00745 ,  G11B7/005 ,  G11B7/0053 ,  G11B20/10222 ,  G11B20/1217 ,  G11B20/14 ,  G11B2020/1221 ,  G11B2020/1287 ,  G11B2220/2537

摘要： A big pattern for a run-in area which allows data reproduction to be performed stably even when the recording density of an optical disc is increased is provided. An optical disc according to the present invention includes tracks, each of which divided into a plurality of recording blocks. Each of the plurality of blocks includes a run-in area and a data area. In the run-in area, a prescribed run-in bit pattern is recordable; and in the data area, bit patterns having a plurality of bit lengths obtained by modulating data as a recording target in accordance with a prescribed modulation rule are recordable. In this optical disc, at least one of spatial frequencies corresponding to the bit patterns having the plurality of bit lengths is higher than a cutoff frequency. The run-in bit pattern recordable in the run-in area includes the bit patterns having the plurality of bit lengths, from which the bit pattern corresponding to the frequency higher than the OTF cutoff frequency has been excluded.

摘要翻译： 提供了即使当光盘的记录密度增加时也允许稳定地执行数据再现的运行区域的大图案。 根据本发明的光盘包括被分成多个记录块的轨道。 多个块中的每一个都包括导入区和数据区。 在跑步区域，可以记录规定的磨合位图案; 并且在数据区域中，可以记录具有根据规定的调制规则通过调制作为记录目标的数据而获得的多个位长度的位模式。 在该光盘中，对应于具有多个位长度的位模式的空间频率中的至少一个高于截止频率。 可以在导入区域中记录的流入位模式包括具有多个比特长度的比特模式，从而排除与高于OTF截止频率的频率对应的比特模式。

公开(公告)号：US07869327B2

公开(公告)日：2011-01-11

申请号：US12343894

申请日：2008-12-24

申请人： Harumitsu Miyashita ,  Kohei Nakata

发明人： Harumitsu Miyashita ,  Kohei Nakata

IPC分类号： G11B27/36

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/10222 ,  G11B20/10296 ,  G11B20/10481 ,  G11B2220/2541

摘要： A waveform shaping portion receives a digital reproduced signal generated from an analog reproduced signal reproduced from an information recording medium and shapes the waveform of the digital reproduced signal. A maximum likelihood decoding portion applies maximum likelihood decoding to the digital reproduced signal in the shaped waveform and generates a binarized signal indicating the result of the maximum likelihood decoding. A phase detection portion extracts, during the maximum likelihood decoding, a phase error using state transition patterns having only a single zero cross point among differential metrics at a plurality of merging points at which a set of paths branched from a given state merges. A synchronization detection portion generates a reproduction clock signal using the phase error that has been detected and brings the digital reproduced signal into synchronization with the reproduction clock signal that has been generated. This configuration makes it possible to generate a reproduction clock signal in a stable manner.

摘要翻译： 波形整形部分接收从信息记录介质再现的模拟再现信号产生的数字再生信号，并对数字再现信号的波形进行整形。 最大似然解码部分对成形波形中的数字再现信号应用最大似然解码，并生成指示最大似然解码结果的二值化信号。 相位检测部分在最大似然解码期间使用在从给定状态分支的一组路径合并的多个合并点处的差分度量中仅具有单个零交叉点的状态转换模式来提取相位误差。 同步检测部分使用已经检测到的相位误差来产生再现时钟信号，并使数字再现信号与已经产生的再现时钟信号同步。 该配置使得可以以稳定的方式产生再现时钟信号。

公开(公告)号：US20080231332A1

公开(公告)日：2008-09-25

申请号：US10599237

申请日：2005-03-23

申请人： Kohei Nakata ,  Harumitsu Miyashita

发明人： Kohei Nakata ,  Harumitsu Miyashita

IPC分类号： H03L7/06

CPC分类号： H03L7/107 ,  G11B7/094 ,  G11B7/0941 ,  G11B20/1403 ,  H03L7/091 ,  H03L7/1077 ,  H03M1/1255

摘要： The present invention improves a lead-in time of the PLL with a phase error detector having an enlarged range of phase error detection and gain control based on the PLL synchronous state. The phase error detection range is enlarged by correcting the phase error detection point in a case where the phase error increases. A locked state of the PLL is determined based on a standard deviation of the smoothed phase error values and the gains are switched between a lead-in transient state and a stationary state. As a result, it is possible to shorten and stabilize the lead-in time of the PLL.

摘要翻译： 本发明利用具有基于PLL同步状态的相位误差检测和增益控制的扩大范围的相位误差检测器来改进PLL的导入时间。 在相位误差增大的情况下通过校正相位误差检测点来扩大相位误差检测范围。 PLL的锁定状态基于平滑相位误差值的标准偏差来确定，并且增益在导入瞬态和静止状态之间切换。 结果，可以缩短和稳定PLL的导入时间。

公开(公告)号：US20080225686A1

公开(公告)日：2008-09-18

申请号：US12121506

申请日：2008-05-15

申请人： Mamoru SHOJI ,  Takashi ISHIDA ,  Kohei NAKATA

发明人： Mamoru SHOJI ,  Takashi ISHIDA ,  Kohei NAKATA

IPC分类号： G11B7/00

CPC分类号： G11B7/00736 ,  G11B7/08517 ,  G11B7/0901 ,  G11B7/0945

摘要： An optical disk 101 is of a type in which information is recorded on a groove track, and an optical disk 107 is of a type in which information is recorded on a land track. The optical disk 101 has a control data area 102, and a data recording area 103 in which user data is recorded. The optical disk 107 has a control data area 108, and a data recording area 109 in which user data is recorded. A code for indicating the groove track or the land track onto which tracking servo control is executed is provided both in the control data area 102 of the optical disk 101, and in the control data area 108 of the optical disk 107.

公开(公告)号：US20080225684A1

公开(公告)日：2008-09-18

申请号：US12121424

申请日：2008-05-15

申请人： Mamoru SHOJI ,  Takashi Ishida ,  Kohei Nakata

发明人： Mamoru SHOJI ,  Takashi Ishida ,  Kohei Nakata

IPC分类号： G11B7/00

CPC分类号： G11B7/00736 ,  G11B7/08517 ,  G11B7/0901 ,  G11B7/0945

摘要： An optical disk 101 is of a type in which information is recorded on a groove track, and an optical disk 107 is of a type in which information is recorded on a land track. The optical disk 101 has a control data area 102, and a data recording area 103 in which user data is recorded. The optical disk 107 has a control data area 108, and a data recording area 109 in which user data is recorded. A code for indicating the groove track or the land track onto which tracking servo control is executed is provided both in the control data area 102 of the optical disk 101, and in the control data area 108 of the optical disk 107.

公开(公告)号：US20060256682A1

公开(公告)日：2006-11-16

申请号：US11487241

申请日：2006-07-14

申请人： Kohei Nakata ,  Toyoji Gushima ,  Makoto Usui ,  Kazuya Ohshima ,  Junichi Minamino

发明人： Kohei Nakata ,  Toyoji Gushima ,  Makoto Usui ,  Kazuya Ohshima ,  Junichi Minamino

IPC分类号： G11B5/09

CPC分类号： G11B7/0053 ,  G11B20/1403 ,  G11B27/19 ,  G11B27/24 ,  G11B2220/20

摘要： A wobble demodulator for reproducing digital information from an optical recording medium in which a track is formed in accordance with a wobble signal that is MSK-modulated so as to contain the digital information by a carrier signal with a predetermined frequency and a sine wave signal with a frequency different from that of the carrier signal, includes: a wobble signal detector for detecting a wobble signal of the track from the optical recording medium; a wobble PLL for detecting the carrier signal based on the wobble signal detected by the wobble signal detector; a multiplier for multiplying the carrier signal detected by the wobble PLL by the wobble signal detected by the wobble signal detector and outputting a multiplied output; a MSK detector for detecting a MSK modulation mark having a phase or a frequency different from that of the carrier signal, based on an integrated value obtained by integrating the multiplied output from the multiplier on a predetermined section basis; and a MSK synchronization detector for detecting a synchronization position with respect to the digital information, based on the MSK modulation mark detected by the MSK detector, wherein the MSK detector compares a continuous predetermined number of the integrated values with a first threshold value for detecting a central portion of the MSK modulation mark, a second threshold value for detecting leading and trailing edges of the MSK modulation mark, and a third threshold value for detecting non-modulated portions before and after the MSK modulation mark, and detects the MSK modulation mark based on a pattern of a comparison result.

摘要翻译： 一种用于从光学记录介质再现数字信息的摆动解调器，其中，根据通过MSK调制的摆动信号形成轨道，以便通过具有预定频率的载波信号和正弦波信号来包含数字信息， 与载波信号不同的频率包括：摆动信号检测器，用于从光记录介质检测轨道的摆动信号; 摆动PLL，用于基于由摆动信号检测器检测的摆动信号检测载波信号; 乘法器，用于将由摆动PLL检测的载波信号乘以由摆动信号检测器检测的摆动信号并输出​​乘法输出; 基于通过对乘法器的乘法输出进行积分而获得的积分值，基于规定的区间来检测具有与载波信号的相位或频率不同的MSK调制标记的MSK检测器; 以及MSK同步检测器，用于基于由MSK检测器检测到的MSK调制标记来检测相对于数字信息的同步位置，其中，MSK检测器将连续的预定数量的积分值与用于检测 MSK调制标记的中心部分，用于检测MSK调制标记的前沿和后沿的第二阈值，以及用于检测MSK调制标记之前和之后的未调制部分的第三阈值，并且基于MSK调制标记检测MSK调制标记 在一个比较结果的模式。

公开(公告)号：US07052354B2

公开(公告)日：2006-05-30

申请号：US10630679

申请日：2003-07-31

申请人： Kohei Nakata

发明人： Kohei Nakata

IPC分类号： H01J9/00 ,  H01J9/24

CPC分类号： H01J9/00 ,  H01J1/88

摘要： In a method of producing a spacer for a display apparatus by heat drawing a base glass material having a cross section with different dimensions in a longitudinal and lateral directions and then cutting into a desired length, a base glass material in which a high-viscosity glass material is combined on both ends of a low-viscosity glass material is drawn within a temperature range in which both glass materials have different viscosities. Such method avoids a deformation of the spacer such as an expansion or a rounding at the longitudinal ends in the cross section of the spacer or a constriction in an intermediate portion in the longitudinal direction.

摘要翻译： 在通过在纵向和横向上将具有不同尺寸的横截面并然后切割成所需长度的基底玻璃材料来制造用于显示装置的间隔件的方法中，使用高粘度玻璃 在低粘度玻璃材料的两端上组合材料在两种玻璃材料具有不同粘度的温度范围内被拉伸。 这种方法避免了间隔件的变形，例如在间隔件的横截面中的纵向端部处的膨胀或圆形或在纵向方向上的中间部分中的收缩部。