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公开(公告)号：US09495999B2
公开(公告)日：2016-11-15
申请号：US14964614
申请日：2015-12-10
Inventor： Junichi Minamino , Kohei Nakata
IPC: G11B7/0045 , G11B20/10 , G11B7/09 , G11B7/24082 , G11B7/005 , G11B20/12 , G11B7/007
CPC classification number: G11B20/1024 , G11B7/0053 , G11B7/0941 , G11B7/24082 , G11B20/10222 , G11B2007/00754 , G11B2020/1268
Abstract: A phase error detector includes a sine wave generation circuit that generates a sine wave signal, based on a first input signal of a first period, a cosine wave generation circuit that generates a cosine wave signal, based on the first input signal, a first calculator that calculates a phase difference between the sine wave signal and a second input signal of a second period, a second calculator that calculates a phase difference between the cosine wave signal and the second input signal, and a first selection unit that outputs the phase difference calculated by the first calculator when the phase difference calculated by the second calculator is within a predetermined range, and outputs a predetermined value having a same sign as a sign of the phase difference calculated by the first calculator when the phase difference calculated by the second calculator is out of the predetermined range.
Abstract translation: 相位误差检测器包括基于第一周期的第一输入信号产生正弦波信号的正弦波产生电路，基于第一输入信号产生余弦波信号的余弦波生成电路，第一计算器 其计算正弦波信号和第二周期的第二输入信号之间的相位差，计算余弦波信号和第二输入信号之间的相位差的第二计算器，以及输出计算出的相位差的第一选择单元 当由第二计算器计算的相位差处于预定范围内时，通过第一计算器输出由第二计算器计算出的相位差为由第一计算器计算出的相位差的符号的相同符号的预定值， 超出预定范围。
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公开(公告)号：US09978421B1
公开(公告)日：2018-05-22
申请号：US15784142
申请日：2017-10-15
Inventor： Kohei Nakata , Yoshihisa Takahashi , Junichi Minamino
IPC: G11B20/18 , G11B7/24088 , G11B20/00
CPC classification number: G11B20/1883 , G11B7/00458 , G11B7/24088 , G11B20/00586 , G11B20/1879 , G11B20/1889
Abstract: The optical disk device performs recording/reproducing of data by a predetermined recording block on the track of an optical disk. The device has a recording unit, an optical-head, and a failure detection unit. The recording unit generates a recording signal by modulating the data. The optical-head records data on the track by optical beam emission to the track according to the recording signal, and detects light reflected off the track and then generates a detection signal based on the reflected light. The failure detection unit detects an abnormal condition based on the detection signal changed from a normal condition. If the sum of duration of an abnormal condition in the recording block is equal to or greater than a first time-length, the failure detection unit determines that the recording block has a flaw.
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公开(公告)号：US09959901B1
公开(公告)日：2018-05-01
申请号：US15427643
申请日：2017-02-08
Inventor： Harumitsu Miyashita , Yasumori Hino , Junichi Minamino , Tsutomu Kai
CPC classification number: G11B20/1816 , G11B7/0037 , G11B7/00375 , G11B7/0948 , G11B19/041 , G11B20/10314 , G11B20/18
Abstract: An inspection method for a recordable optical disc includes focusing laser light on a recording layer and obtaining a data signal dependent on the laser light reflected by the recording layer. The inspection method also includes determining whether the optical disc includes a defect or not by identifying a first period every second period in the obtained data signal obtained, the first period being a period in which a signal level of the data signal is lower than a predetermined value, and each of the second periods corresponding to an ECC block, and outputting a result of the determination.
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Patent Agency Ranking
4.发明授权Optical disc capable of recording address information with the same modulation on sides of adjacent grooves 有权能够在相邻槽的侧面记录具有相同调制的地址信息的光盘公开(公告)号：US09495994B2
公开(公告)日：2016-11-15
申请号：US14984179
申请日：2015-12-30
Inventor： Junichi Minamino , Harumitsu Miyashita , Kohei Nakata
IPC: G11B7/24 , G11B7/007 , G11B20/10 , G11B7/24082 , G11B20/12 , G11B27/30 , G11B7/005 , G11B7/24079 , G11B7/24085
CPC classification number: G11B7/00718 , G11B7/0053 , G11B7/007 , G11B7/00745 , G11B7/24079 , G11B7/24082 , G11B7/24085 , G11B20/10 , G11B20/1217 , G11B27/3027 , G11B2007/00754
Abstract: An optical disc medium includes a land and a groove at which information can be recorded. A predetermined number of address information units which record address information of the land or groove are provided in a circumferential direction of the optical disc medium. The address information unit of the land includes three or more address recording areas capable of recording address information. The address information is recorded on one area selected from among the three or more address recording areas. The address information unit of the land has address information which is recorded, in the same modulation, on the side of the inner adjacent groove and on the side of the outer adjacent groove. The one area to be selected from among the three or more address recording areas for recording the address information of the land is different among three address information units adjacently arranged in a radial direction.
Abstract translation: 光盘介质包括可以记录信息的平台和凹槽。 在光盘介质的圆周方向上设置预定数量的地址信息单元，其记录地面或凹槽的地址信息。 地面的地址信息单元包括能够记录地址信息的三个以上的地址记录区域。 地址信息被记录在从三个或更多个地址记录区域中选择的一个区域上。 陆地的地址信息单元具有在相同的调制中在内相邻槽的侧面和外相邻槽的一侧记录的地址信息。 从用于记录土地的地址信息的三个或更多个地址记录区域中选择的一个区域在径向相邻地布置的三个地址信息单元中是不同的。
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公开(公告)号：US09741383B2
公开(公告)日：2017-08-22
申请号：US14666488
申请日：2015-03-24
Inventor： Kohei Nakata , Yasumori Hino , Harumitsu Miyashita , Junichi Minamino , Yoshihisa Takahashi
IPC: G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/0037 , G11B7/2407 , G11B20/12 , G11B7/24082
CPC classification number: G11B7/0053 , G11B7/0037 , G11B7/0045 , G11B7/00718 , G11B7/00736 , G11B7/0079 , G11B7/2407 , G11B7/24082 , G11B20/1217 , G11B20/1252 , G11B2007/00754 , G11B2020/1242 , G11B2020/1268 , G11B2020/1277 , G11B2020/1294
Abstract: A track of an optical disk is formed by wobbling and divided into zones, a clock ratio of a recording clock to a wobble clock is preset for each zone, a wobble signal is detected from the optical disk, the wobble clock is generated from the wobble signal, a present position is identified by reproducing ADIP indicating a position of the track from the wobble signal and the wobble clock, the recording clock is generated with respect to the wobble clock, a data address present position is identified from the present position, a start end position of the ADIP in a recording target zone, a start end position of the data address in the recording target zone, and the clock ratio, a recording start position is identified based on the data address present position; and the data is recorded from the recording start position of the recording target zone.
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公开(公告)号：US09680526B2
公开(公告)日：2017-06-13
申请号：US14964615
申请日：2015-12-10
Inventor： Junichi Minamino , Kohei Nakata
CPC classification number: H04B3/462 , G11B20/1024 , G11B20/1816
Abstract: A phase error detector includes an N counter configured to frequency-divide a first clock by N, and output a signal at predetermined timing, an M counter configured to frequency-divide a second clock by M, and output a signal at predetermined timing, a comparator configured to perform phase comparison between a phase when a value of the N counter is 0 and a phase when a value of the M counter is 0, and perform phase comparison between a phase when a value of the N counter is equal to a value obtained by dividing N into a substantially predetermined value and a phase when a value of the M counter is equal to a value obtained by dividing M into a substantially predetermined value and a synthetic circuit configured to generate a phase error, based on comparison results of the comparator.
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公开(公告)号：US09401172B2
公开(公告)日：2016-07-26
申请号：US14984143
申请日：2015-12-30
Inventor： Junichi Minamino , Harumitsu Miyashita , Kohei Nakata
IPC: G11B7/24 , G11B7/007 , G11B7/24079 , G11B7/24085
CPC classification number: G11B7/00718 , G11B7/0053 , G11B7/007 , G11B7/00745 , G11B7/24079 , G11B7/24082 , G11B7/24085 , G11B20/10 , G11B20/1217 , G11B27/3027 , G11B2007/00754
Abstract: An optical disc medium includes a land and a groove at which information can be recorded. A predetermined number of address information units which record address information of the land or groove are provided in a circumferential direction of the optical disc medium. The address information unit of the land includes three or more address recording areas capable of recording address information. The address information is recorded on one area selected from among the three or more address recording areas. The address information unit of the land has address information which is recorded, in the same modulation, on the side of the inner adjacent groove and on the side of the outer adjacent groove. The one area to be selected from among the three or more address recording areas for recording the address information of the land is different among three address information units adjacently arranged in a radial direction.
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公开(公告)号：US09454985B2
公开(公告)日：2016-09-27
申请号：US14641936
申请日：2015-03-09
Inventor： Junichi Minamino , Harumitsu Miyashita , Kohei Nakata
IPC: G11B7/24 , G11B7/007 , G11B20/10 , G11B7/24082 , G11B20/12 , G11B27/30 , G11B7/005 , G11B7/24079 , G11B7/24085
CPC classification number: G11B7/00718 , G11B7/0053 , G11B7/007 , G11B7/00745 , G11B7/24079 , G11B7/24082 , G11B7/24085 , G11B20/10 , G11B20/1217 , G11B27/3027 , G11B2007/00754
Abstract: An optical disc medium includes a land and a groove at which information can be recorded. A predetermined number of address information units which record address information of the land or groove are provided in a circumferential direction of the optical disc medium. The address information unit of the land includes three or more address recording areas capable of recording address information. The address information is recorded on one area selected from among the three or more address recording areas. The address information unit of the land has address information which is recorded, in the same modulation, on the side of the inner adjacent groove and on the side of the outer adjacent groove. The one area to be selected from among the three or more address recording areas for recording the address information of the land is different among three address information units adjacently arranged in a radial direction.
Abstract translation: 光盘介质包括可以记录信息的平台和凹槽。 在光盘介质的圆周方向上设置预定数量的地址信息单元，其记录地面或凹槽的地址信息。 地面的地址信息单元包括能够记录地址信息的三个以上的地址记录区域。 地址信息被记录在从三个或更多个地址记录区域中选择的一个区域上。 陆地的地址信息单元具有在相同的调制中在内相邻槽的侧面和外相邻槽的一侧记录的地址信息。 从用于记录土地的地址信息的三个或更多个地址记录区域中选择的一个区域在径向相邻布置的三个地址信息单元中是不同的。
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