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公开(公告)号：JPH0337862A
公开(公告)日：1991-02-19
申请号：JP17276389
申请日：1989-07-04
Applicant: SONY CORP
Inventor： SAITO ICHIRO , TANAKA SHOJI
IPC: G11B19/12
Abstract: PURPOSE:To process two disks appropriately by discriminating whether the disk is the one formatted with a first format or the one with a second format from information read by moving the position of an information reading means. CONSTITUTION:When a disk insertion detector 5 outputs the detection signal So of a floppy disk 1, a controller 4 supplies a signal S3 to a head moving device 6, and a magnetic head 2 is moved to the position of a directory in the case of performing the formatting small in capacity of the floppy disk 1. Following that, a signal S1 is supplied from the magnetic head 2 to a directory reader 3, and the controller 4 discriminates the presence/absence of the directory according to a signal S2. When it is discriminated that the directory exists, a data processing small in capacity is performed with a signal S6. When it is judged that no directory exists, the magnetic head 2 is moved to the position of the directory in the case of performing the formatting large in capacity, and the presence/absence of the directory is discriminated, and a data processing S5 large in capacity or error display S4 is performed.
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公开(公告)号：JPH02183474A
公开(公告)日：1990-07-18
申请号：JP226089
申请日：1989-01-09
Applicant: SONY CORP
Inventor： TANAKA SHOJI
Abstract: PURPOSE:To enable an S/W to obtain always a good data read signal by reading repeatedly the same data in a magnetic disk when an error in this reproducing data is more than a prescribed settlement. CONSTITUTION:An error in a reproducing data to be obtained from a data reproducing part is detected by a control part 29, and when this error is more than a prescribed settlement, a head driving part 12 is operated to bring a read magnetic head 11 under the repeating state of reading the data from the same annular recording track in the magnetic disk 10. Then, a data read signal from the head 11 is supplied via a signal selection supply part 15 to a signal addition processing part 18. Now, a synthesized data read signal is obtained in the processing part 18, so as to be turned into the reproduced data by a data reproducing part 27.
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公开(公告)号：JPS6410463A
公开(公告)日：1989-01-13
申请号：JP16418387
申请日：1987-07-01
Applicant: SONY CORP
Inventor： KUTARAGI TAKESHI , TANAKA SHOJI , FUJINAMI YASUSHI
IPC: G11B5/012 , G11B5/48 , G11B7/007 , G11B11/105 , G11B19/02 , G11B19/04 , G11B20/12 , G11B20/18 , G11B27/13 , G11B27/30
Abstract: PURPOSE:To promote a recording density and also to enable write by providing a guard band between a read only track region and a write-enable track region and evading a miswrite into the write only track at the time of write. CONSTITUTION:The guard band GB (W) having an enough width to be capable of evading a miswrite into the read region AR (R) is provided between the read only track region AR (R) and the write-enable track region AR (W/R) on a magnetic disk 21. Thus, because of the read only track region AR (R) being provided, a track position error can be minimized, so that a track pitch can hence be narrowed. In addition, because of the write-enable track region AR (W/R) being provided, data cannot be written. Furthermore, it is not feared that the read region is erased by the wide guard band GB (W), so that the recording density is promoted and also the write is feasible.
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公开(公告)号：JP2005011407A
公开(公告)日：2005-01-13
申请号：JP2003172636
申请日：2003-06-17
Inventor： TANAKA SHOJI , HINO YOSHIHIRO , IMAI YASUYUKI , SASA TAKESHI , ITAYA MASARU , SUZUKI KAZUYA
Abstract: PROBLEM TO BE SOLVED: To provide a hard disk drive especially for AV use, capable of guaranteeing a predetermined transfer rate or more under predetermined environmental conditions.
SOLUTION: An HDD1 maintains a transfer rate or more when moving image data are written or read under a predetermined temperature, humidity, air pressure, vibration or acceleration conditions. For example, the predetermined transfer rate is set to 1.1×A×N (Mbps) in which A (Mbps) is the transfer rate of a single stream is A (Mbps) and N is the number of streams read or written by the hard disk drive.
COPYRIGHT: (C)2005,JPO&NCIPIAbstract translation: 要解决的问题：提供特别用于AV使用的硬盘驱动器，能够在预定的环境条件下保证预定的传输速率或更多的传输速率。 解决方案：当在预定温度，湿度，气压，振动或加速条件下运动图像数据被写入或读取时，HDD1保持传送速率或更高传输速率。 例如，将预定传输速率设定为1.1×A×N（Mbps），其中A（Mbps）是单个流的传输速率为A（Mbps），并且N是由硬读取或写入的流的数量 磁盘驱动器。 版权所有（C）2005，JPO＆NCIPI
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35.发明专利
公开(公告)号：JP2001067658A
公开(公告)日：2001-03-16
申请号：JP24653999
申请日：1999-08-31
Applicant: SONY CORP
Inventor： SUZUKI KAZUYA , TANAKA SHOJI
IPC: G11B5/84
Abstract: PROBLEM TO BE SOLVED: To reduce inspecting time and handling time and to reliably detect projections by forming projecting parts having a prescribed height in a prescribed position on a main surface, floating and running a projection detecting sensor on the main surface and inspecting the surface projections according to signals obtained by the collision off the prjecting parts with the projection detecting sensor. SOLUTION: Projection-like bumps 4 having the prescribed height are formed in the prescribed position in the calibration area 1 on the main surface of a substrate 2. First to third bumps 4a-4c are respectively formed on first to third recording tracks 5a-5c. A projection detecting sensor is floated and run on the main surface to collide with the bumps 4, and the surface projections are inspected according to signals obtained by the collision. The height of the bump 4 with which the projection detecting sensor collides is compared with that of the bump 4 with which the sensor does not collide to judge the floating height, the projection detecting sensor is adjuted, the relative position of the projection detecting sensor from the bumps 4 is judged, thereby corrects the running position.
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Patent Agency Ranking
公开(公告)号：JPH11328670A
公开(公告)日：1999-11-30
申请号：JP13897398
申请日：1998-05-20
Applicant: SONY CORP
Inventor： TANAKA SHOJI , TANAKA SATOSHI
IPC: G11B5/84
Abstract: PROBLEM TO BE SOLVED: To inspect projections and defects concurrently by recording an inspection signal to a magnetic disk by an inductive type magnetic head, reproducing the signal by a magnetoresistance effect type magnetic (MR) head, separating the signal by a filter to a first, a second signal components of a lower, a higher frequencies than a predetermined frequency. SOLUTION: An inspecting apparatus 1 has a vanish head 3 for removing dust, etc., adhering to a surface of a magnetic disk 2 and an inspection sensor 4 as a combination of an inductive type magnetic head and an MR head. The inspection sensor 4 records an inspection signal to the magnetic disk 2 by the inductive type magnetic head and reproduces the recorded signal by the MR head. A reproduction signal 18 from the MR head is separated by a filter 6 with a predetermined frequency to a projection detection signal 18a of a relatively low frequency and a defect detection signal 18b of a relatively high frequency which are then processed by a projection detection circuit 5 and a defect detection circuit 8.
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公开(公告)号：JPH11328602A
公开(公告)日：1999-11-30
申请号：JP13576698
申请日：1998-05-18
Applicant: SONY CORP
Inventor： MORITA OSAMI , TANAKA SHOJI
Abstract: PROBLEM TO BE SOLVED: To realize magnetization of an adequate stake of a PERM disk(Pre- Embossed Rigid Magnetic Disk). SOLUTION: For magnetization of a PERM disk, the coersive force Hc of a PERM disk 1, thickness d, coersive force rectangular shape ratio S*, level difference d of disk surface, magnetic gap length g of magnetic head 12 for magnetization, recording efficiency η, number of turns n of coil, floating amount h, current supplied to magnetic head for magnetization are determined to satisfy the equations I and II.
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公开(公告)号：JPH10255407A
公开(公告)日：1998-09-25
申请号：JP6153397
申请日：1997-03-14
Applicant: SONY CORP
Inventor： TANAKA SHOJI , MORITA OSAMI
Abstract: PROBLEM TO BE SOLVED: To provide a ROM type magnetic disk medium using an embossed pattern suppressing floating fluctuation of a slider, its code conversion method and signal recording method. SOLUTION: This method is a code conversion method ϕ applied to manufacture of the ROM type magnetic disk medium 3 using the embossed pattern and making correspond a conversion code Ec for the embossed pattern based on a source code Sd of a K-bit (K is integer) length, and code converts for a source code Sd by selecting a conversion code Ec from conversion codes of L bit (L is integer, and L>K) length and corresponding, and the DSV value of the selected conversion code Ec is code-converted so as to be satisfied with DSV=L×(R-1)/(R+1) related to an island/sea ratio R being a given condition.
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公开(公告)号：JPH09305964A
公开(公告)日：1997-11-28
申请号：JP15002496
申请日：1996-05-20
Applicant: SONY CORP
Inventor： TANAKA SHOJI
Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic disk in which a recording capacity is increased by a method wherein patterns at frequencies which are different on one side and on the other side with reference to the central line of a data track formed in a data storage area are formed inside a control-signal storage area and the occupied area of the patterns is reduced. SOLUTION: The position of a magnetic head 8 is set to be a just-on track when amplitudes of a pattern A and a pattern B detected by the magnetic head 8 are equal and when peak intervals of the amplitudes of both patterns are equal. That is to say, the pattern A is arranged on one side of the central line of a data track DT, the pattern B is arranged on the other side, and they are arranged in such a way that frequencies are different in the respective patterns on every track DT. Then, frequencies at the patterns A, B regarding a track DT in a track No.1 are set at f1, f3, the frequencies at the patterns A, B regarding a track No. I+1 are set at f2, f3, and frequencies at both patterns regarding a track No. I+2 are set at f2, f4. Thereby, the occupied area of the patterns is reduced, and a recording capacity can be increased.
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公开(公告)号：JPH097328A
公开(公告)日：1997-01-10
申请号：JP15821495
申请日：1995-06-23
Applicant: SONY CORP
Inventor： TANAKA SHOJI , KAWAZOE KAZUSHIGE
Abstract: PURPOSE: To detect a projection of a magnetic disk with high reliability by outputting a reproduction signal corresponding to resistivity being changed by external magnetism. CONSTITUTION: Coming into contact with a projecting part 25 of a magnetic disk 2, an MR element 18 is cooled down by the disk 2 and a sudden change in temperature occurs therein. A signal S1 caused by this contact is supplied to an waveform observing unit 12 through an amplifier 10 and a signal processing part 11. Thereby obtaining the detection signal S1 equivalent to a write signal S0 in sufficient S/N and detecting the projection of the disk 2 with high reliability.
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