公开(公告)号：JP2004054971A

公开(公告)日：2004-02-19

申请号：JP2002207270

申请日：2002-07-16

Applicant: Sony Corp ,  ソニー株式会社

Inventor： MUNEKATA KAZUMI ,  OWA HIDEO ,  OGIWARA KOICHIRO

IPC: G11B7/0045 ,  G11B7/085

Abstract: PROBLEM TO BE SOLVED: To attain reduction of recording time by eliminating the useless recording operation of the information in an optical disk device having a plurality of beams.
SOLUTION: The user information 54A, in which pointers are set by the execution of a pointer set program 58 according to a CPU 50, is separated by the pointers PF set for every phase and supplied to an encoder 38. In the encoder 38, the encode process based on the format of the optical disk is carried out for every block unit of the input information. Data after the process are separated by referring to the beam allocation pointers PB0, PB1, PB2 which are set for every beam. Encode data for every beam are inputted to a recording circuit 40 in parallel. When the recording signal is outputted for every beam in accordance with the inputted encode data, a laser array is emitted and the user information 54A is recorded on the disk.
COPYRIGHT: (C)2004,JPO

公开(公告)号：JPS6460801A

公开(公告)日：1989-03-07

申请号：JP21746287

申请日：1987-08-31

Applicant: SONY CORP

Inventor： FUJIMOTO YOSHIHIRO ,  OGIWARA KOICHIRO ,  FUJIMURA KAZUHIRO ,  GOTO SATORU

IPC: G11B5/09

Abstract: PURPOSE:To record and reproduce data with a remarkably small bit error rate by obtaining a superior magnetizing pattern with symmetry, by setting a current on an erasing head corresponding to the current on a write/readout head. CONSTITUTION:The write/readout heads 4F and 4R to write and read out recording information for a recording medium and the erasing heads 5F and 5R to erase both side edges of a recording pattern on which the recording information is written at the time of writing are provided. The currents IW1 and IW2 that flow on the erasing heads 5F and 5R are set by an erasing head current setting circuit 13 corresponding to the currents IE1 and IE2 on the write/readout heads 4F and 4R. Therefore, it is possible to realize the symmetry of the magnetic flux generated from the write/readout heads 4F and 4R with that generated from the erasing heads 5F and 5R. In such a way, a difference between an erasing current and a write current can be reduced, that, it is possible to record the magnetizing pattern having a satisfactory symmetry in practical use, and to improve the bit error rate remarkably.

公开(公告)号：JPS6453302A

公开(公告)日：1989-03-01

申请号：JP21086587

申请日：1987-08-25

Applicant: SONY CORP

Inventor： GOTO SATORU ,  SHOJI NORIO ,  FUJIMOTO YOSHIHIRO ,  OGIWARA KOICHIRO

IPC: G11B5/027 ,  G11B5/035

Abstract: PURPOSE:To permit the optimum recording current to flow on each magnetic head, by adjusting currents on plural magnetic heads by respective adjusting means. CONSTITUTION:Resistors 35 and 36 for adjusting the recording current are provided at a head carriage 52 side. When a head selection terminal signal 44 is set at a high level, a transistor 37 is turned on, and the resistors 35 and 39 function in parallel. On the other hand, when the signal terminal 44 is set at a low level, the resistors 35 and 39 are set in parallel with each other. Therefore, it is possible to adjust the current that flows on pins 41 and 42 by adjusting the resistance values of the resistors 35 and 36, thereby, to adjust the recording current on the magnetic heads 25 and 26. Therefore, it is possible to use each magnetic head in the optimum recording current.

公开(公告)号：JP2003323721A

公开(公告)日：2003-11-14

申请号：JP2002130029

申请日：2002-05-01

Applicant: Sony Corp ,  ソニー株式会社

Inventor： OGIWARA KOICHIRO ,  OWA HIDEO ,  MUNEKATA KAZUMI

IPC: G11B7/005

Abstract: PROBLEM TO BE SOLVED: To quickly record information in an optical disk by determining a necessary address in a short period, when writing information by a plurality of light beams. SOLUTION: In an address calculation circuit 34, when the address of a light beam is detected, the address of remaining light beam at that time and the next address to be read are calculated. Then, these calculated addresses are compared with the detected addresses in a comparison circuit 32. Then, a decision circuit 36 decides whether the detected addresses and the computed addresses matches. When they matches, the information recording is started, and when they do not match, the error deletion of the information is prevented by halting the recording of information. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：当通过多个光束写入信息时，通过在短时间内确定必要的地址来快速地将信息记录在光盘中。 解决方案：在地址计算电路34中，当检测到光束的地址时，计算该时间剩余光束的地址和下一个要读取的地址。 然后，将这些计算的地址与比较电路32中的检测到的地址进行比较。然后，判定电路36判定检测到的地址和计算的地址是否匹配。 当它们匹配时，信息记录开始，并且当它们不匹配时，通过停止记录信息来防止信息的错误删除。 版权所有（C）2004，JPO

公开(公告)号：JPH03171471A

公开(公告)日：1991-07-24

申请号：JP31169889

申请日：1989-11-30

Applicant: SONY CORP

Inventor： OGIWARA KOICHIRO

IPC: G11B19/10 ,  G11B19/12

Abstract: PURPOSE:To omit a detecting means which detects loading by deciding a recording medium is loaded according to the detection output of a detecting means which detects the storage capacity of a storage medium. CONSTITUTION:Depression type capacity detection switches 23A and 23B are provided and turn on and off according to whether or not the disk case 21C of a loaded floppy disk 21 is provided with a 2MB detection hole 22A or 4MB detection hole 22B. Then the signal levels of a 2MB detection signal S2M and a 4MB detection signal S4M which are inputted to inverted input terminals T1 and T2 of a negative OR circuit 25 and a control circuit 27 indicate a logical H level or logical L level according to whether or not there is a capacity detection hole 22. For the purpose, the negative OR circuit 25 detects the signal level of at least either of the capacity detection signals S2M and S4M varies to detect the floppy disk 21 being loaded. Consequently, the detecting means which detects the recording medium being loaded can be omitted.

公开(公告)号：JPS6352303A

公开(公告)日：1988-03-05

申请号：JP19625986

申请日：1986-08-20

Applicant: SONY CORP

Inventor： OGIWARA KOICHIRO

IPC: G11B5/09 ,  G11B5/024

Abstract: PURPOSE:To allow a wide range for the interval between the magnetic gap of a tunnel erase head and that of a recording/reproducing head and to obtain a small-sized magnetic recorder of high recording density by making the extent, by which the erase start timing is delayed behind the recording start timing, different between existence of the magnetic head in an outside peripheral area and that in an inside peripheral area. CONSTITUTION:The position of a magnetic head 11 in the diametral direction of a magnetic disk is detected and a timing switching signal is generated in a track counter 3 based on track position information, and this timing switching signal is supplied to a timing generating circuit 2. A timing generating circuit 2 is controlled by the timing switching signal, and the extent (value Ton) by which the erase start timing is delayed behind the recording start timing is made different between existence of the magnetic head 11 in the outside peripheral area and that in the inside peripheral area and is set to a value to satisfy prescribed relations.

公开(公告)号：JP2010153026A

公开(公告)日：2010-07-08

申请号：JP2010027484

申请日：2010-02-10

Applicant: Sony Corp ,  ソニー株式会社

Inventor： OGIWARA KOICHIRO

IPC: G11B7/004 ,  G11B7/005 ,  G11B19/12

Abstract: PROBLEM TO BE SOLVED: To provide an optical disk drive or the like capable of accurately discriminating in a short time whether a loaded optical disk is a recordable optical disk.
SOLUTION: A signal corresponding to groove wobble is reproduced from the prescribed position in the radial direction of an optical disk in a state in which the loaded optical disk is rotated at the prescribed rotary speed, a plurality of frequency components corresponding to a frequency of groove wobble of various recordable optical disks are extracted. A frequency level of an output signal of a plurality of filter means is detected, then it is discriminated by using the detected signal whether the loaded optical disk is a first optical disk, a second optical disk, or a third optical disk.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供能够在短时间内精确地识别装载的光盘是否是可记录光盘的光盘驱动器等。 解决方案：在装载的光盘以规定的转速旋转的状态下，从光盘径向的规定位置再现与凹槽摆动相对应的信号，对应于 提取各种可记录光盘的槽摆动频率。 检测多个滤波器装置的输出信号的频率电平，然后利用检测信号判别装载的光盘是第一光盘，第二光盘或第三光盘。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2002100041A

公开(公告)日：2002-04-05

申请号：JP2000289348

申请日：2000-09-22

Applicant: SONY CORP

Inventor： OGIWARA KOICHIRO

IPC: G11B7/004 ,  G11B19/12

Abstract: PROBLEM TO BE SOLVED: To discriminate surely and in a short time whether the loaded optical disk is a recordable optical disk or not. SOLUTION: In a wobble detecting part 118, frequency components of the groove wobbles of a DVD-RW disk and a DVD+RW disk are respectively extracted from a push-pull signal SPP by filters 121, 122. Detection levels LV1, LV2 for the respective frequency components are supplied to a controller 105 from this wobble detecting part 118. The loaded optical disk is discriminated by the controller 105 based on these detection levels L1, L2. This method is to make parallel discriminations whether the loaded optical disk is the DVD-RW disk and whether it is the DVD+RW disk, then the discrimination whether the loaded optical disk is the recordable optical disk (DVD-RW disk, DVD+RW disk) or not, is surely attained in a short time.

公开(公告)号：JPH1196602A

公开(公告)日：1999-04-09

申请号：JP33848997

申请日：1997-12-09

Applicant: SONY CORP

Inventor： YAMAGAMI TAMOTSU ,  TAKEDA RITSU ,  KOBAYASHI SHOEI ,  OGIWARA KOICHIRO

IPC: G11B7/2407 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/013 ,  G11B7/24 ,  G11B20/12

Abstract: PROBLEM TO BE SOLVED: To provide a novel recording medium which realizes a high density, recording and reproducing reliability and the ease of processing of a drive assembly. SOLUTION: The wobbling amplitude amt. of tracks is specified to 10 to 14 nm and the track pitch of the tracks to 0.74 to 0.82 μm. These values are values to realize larger capacity recording and to prevent the degradation in recording and reproducing performance. Recommended information for recording and reproducing operation in an inner peripheral position and outer peripheral position, respectively, is recorded as management information. The data size of linking sections is set at the same size as the size of the sectors constituting data blocks.

公开(公告)号：JP2521975B2

公开(公告)日：1996-08-07

申请号：JP21746287

申请日：1987-08-31

Applicant: SONY CORP

Inventor： FUJIMOTO YOSHIHIRO ,  OGIWARA KOICHIRO ,  FUJIMURA KAZUHIRO ,  GOTO SATORU

IPC: G11B5/09