公开(公告)号：DE69630342T2

公开(公告)日：2004-08-19

申请号：DE69630342

申请日：1996-08-01

Applicant: SONY CORP

Inventor： TSUTSUI KEIICHI ,  KOBAYASHI MOTOHISA

IPC: H04N5/85 ,  G11B7/00 ,  G11B7/085 ,  G11B7/09

Abstract: A disk driving device for use in recording and/or reproducing data on an optical recording medium having a plurality of recording layers. When a focus jump operation is executed between the recording layers, an actuator displaces an objective lens in response to a selectively generated acceleration or deceleration pulse and a focus error signal. Instability of the focus jump operation derived from noise superimposed on the focus error signal or from sensitivity variations in the actuator is eliminated.

公开(公告)号：CA2182262A1

公开(公告)日：1997-02-05

申请号：CA2182262

申请日：1996-07-29

Applicant: SONY CORP

Inventor： TSUTSUI KEIICHI ,  KOBAYASHI MOTOHISA

IPC: H04N5/85 ,  G11B7/00 ,  G11B7/085 ,  G11B7/09 ,  G11B7/24

Abstract: A disk driving device for use in recording and/or reproducing data on an optical recording medium having a plurality of recording layers. When a focus jump operation is executed between the recording layers, an actuator displaces an objective lens in response to a selectively generated acceleration or deceleration pulse and a focus error signal Instability of the focus jump operation derived from noise superimposed on the focus error signal or from sensitivity variations in the actuator is eliminated.

公开(公告)号：EP1883041A4

公开(公告)日：2010-04-14

申请号：EP06746547

申请日：2006-05-17

Applicant: SONY CORP ,  RENESAS TECH CORP

Inventor： AOKI YOSHITAKA ,  TSUTSUI KEIICHI ,  NISHIZAWA HIROTAKA ,  TOTSUKA TAKASHI

IPC: G06K19/07 ,  G06F3/08 ,  G06K17/00

CPC classification number: G06K19/07 ,  G06K19/07732

公开(公告)号：EP3211536A4

公开(公告)日：2018-06-06

申请号：EP15851846

申请日：2015-07-22

Applicant: SONY CORP

Inventor： SHINBASHI TATSUO ,  TSUTSUI KEIICHI ,  OKUBO HIDEAKI ,  SAKAI LUI ,  NAKANISHI KENICHI ,  FUJINAMI YASUSHI

IPC: G06F12/16 ,  G11C7/10 ,  G11C13/00 ,  G11C16/34 ,  G11C29/52

CPC classification number: G06F11/004 ,  G06F3/0619 ,  G06F12/16 ,  G11C7/1006 ,  G11C13/00 ,  G11C16/3418 ,  G11C16/3427 ,  G11C16/3431 ,  G11C29/52

Abstract: [Object] To sufficiently reduce frequency of error occurrence in memory cells. [Solution] A reading unit reads read data from a memory cell, the read data including an information bit and reversal information for determining whether or not the information bit has been reversed. In addition, an error detection/correction unit detects the presence or absence of an error in the information bit and corrects the error. A data reversing unit reverses the information bit that has the error corrected and the reversal information. Furthermore, a writing unit writes the reversed information bit and the reversed reversal information in the memory cell.

公开(公告)号：EP0814462A2

公开(公告)日：1997-12-29

申请号：EP97303477

申请日：1997-05-21

Applicant: SONY CORP

Inventor： KOMAZAKI TAKAHIRO ,  TSUTSUI KEIICHI

IPC: G11B21/08 ,  G11B7/00 ,  G11B7/004 ,  G11B7/085 ,  G11B7/09

CPC classification number: G11B7/0948 ,  G11B7/08541

Abstract: When a signal is played back from a damaged portion of an optical disk, immediately after the reproduction of the signal from the damaged portion, a mirror signal can be obtained with a high degree of accuracy from conversion of a traverse signal into a binary signal. In a traverse-signal discriminating circuit, a traverse signal, a low-frequency component of a playback signal, is separated from the playback signal and then supplied to a hold circuit. In the hold circuit, the bottom of the traverse signal is held in order to produce a bottom hold signal. In a defect detecting circuit, in the meantime a defect in the playback signal, if any, is detected. If a defect is detected, the defect detecting circuit outputs a defect signal at an H level to a hold-voltage resetting circuit. The hold-voltage resetting circuit discharges a capacitor included in the hold circuit, halting the operation to hold the bottom of the traverse signal as long as the defect signal supplied thereto is set at the H level.

公开(公告)号：CA2182262C

公开(公告)日：2007-04-10

申请号：CA2182262

申请日：1996-07-29

Applicant: SONY CORP

Inventor： TSUTSUI KEIICHI ,  KOBAYASHI MOTOHISA

IPC: G11B7/24 ,  H04N5/85 ,  G11B7/00 ,  G11B7/085 ,  G11B7/09

Abstract: A disk driving device for use in recording and/or reproducing data on an optical recording medium having a plurality of recording layers. When a focus jump operation is executed between the recording layers, an actuator displaces an objective lens in response to a selectively generated acceleration or deceleration pulse and a focus error signal. Instability of the focus jump operation derived from noise superimposed on the focus error signal or from sensitivity variations in the actuator is eliminated.

公开(公告)号：BR0002481A

公开(公告)日：2001-01-02

申请号：BR0002481

申请日：2000-05-19

Applicant: SONY CORP

Inventor： TSUTSUI KEIICHI ,  TAKESHITA YASUYUKI

IPC: G11B7/1263 ,  G11B7/125 ,  G11B11/105 ,  H01S5/0683 ,  G11B13/04 ,  G11B13/00

Abstract: A reproducing laser output can be adjusted to an optimal level. To this end, a magneto-optical disk device (1) comprises a differential amplifier (23) and a shortest recording mark identifier (3) which detect a shortest recording mark reproducing signal corresponding to a component of a shortest recording mark in a reproducing signal obtained by reproducing a magneto-optical disk (100), an envelope detector (33) which detects an amplitude level of the shortest recording mark reproducing signal, a comparator (35) which compares the amplitude level with a reference voltage outputted from the reference voltage source (34), and a drive control section (30) which adjusts the reproducing laser beam to an output level at which the amplitude level is equal to or higher than the reference voltage, based on a comparison result from the comparator (35).

公开(公告)号：CA2308427A1

公开(公告)日：2000-11-19

申请号：CA2308427

申请日：2000-05-10

Applicant: SONY CORP

Inventor： TAKESHITA YASUYUKI ,  TSUTSUI KEIICHI

IPC: G11B7/1263 ,  G11B7/125 ,  G11B11/105 ,  H01S5/0683 ,  G11B13/04

Abstract: A reproducing laser output can be adjusted to an optimal level. To this end, a magneto-optical disk device 1 comprises a differential amplifier 23 and a shortest recording mark identifier 33 which detect a shortest recording mark reproducing signal corresponding to a component of a shortest recording mark in a reproducing signal obtained by reproducing a magneto-optical disk 100, an envelope detector 33 which detects an amplitude level of the shortest recording mark reproducing signal, a comparator 35 which compares the amplitude level with a reference voltage outputted from the reference voltage source 34, and a drive control section 30 which adjusts the reproducing laser beam to an output level at which the amplitude level is equal to or higher than the reference voltage, based on a comparison result from the comparator 35.

公开(公告)号：CA2179098A1

公开(公告)日：1996-12-17

申请号：CA2179098

申请日：1996-06-13

Applicant: SONY CORP

Inventor： TSUTSUI KEIICHI ,  IGARASHI KATSUJI

IPC: G11B7/095

Abstract: The invention provides a recording and/or reproduction apparatus for a record medium in the form of a disk by which the necessity for adjustment of an inclination of a head with respect to a disk upon production of the apparatus is eliminated and correct reproduction of data can be assured irrespective of a variation with respect to time. A control circuit controls an offset generation circuit to generate a predetermined offset signal. A skew servo circuit drives a skew motor in response to the offset signal to adjust the relative angle of an optical head with respect to an optical disk to a predetermined angle. A level detection circuit detects the amplitude of the tracking error signal then and outputs it to the control circuit. The control circuit adjusts the offset signal to be outputted from the offset generation circuit so that the amplitude of the tracking error signal may be maximum.

公开(公告)号：EP2800097A4

公开(公告)日：2015-07-22

申请号：EP12865338

申请日：2012-12-20

Applicant: SONY CORP

Inventor： ADACHI NAOHIRO ,  TSUTSUI KEIICHI ,  NAKANISHI KENICHI ,  OKUBO HIDEAKI ,  YAMAMOTO MAKIKO ,  FUJINAMI YASUSHI

IPC: G11C13/00 ,  G06F11/10 ,  G11C7/10 ,  G11C29/04 ,  G11C29/50

CPC classification number: G06F12/121 ,  G06F11/1008 ,  G11C7/1009 ,  G11C11/1673 ,  G11C11/1675 ,  G11C13/0002 ,  G11C13/0004 ,  G11C13/0033 ,  G11C13/0035 ,  G11C13/004 ,  G11C13/0059 ,  G11C13/0069 ,  G11C29/50004 ,  G11C2013/0076 ,  G11C2029/0411 ,  G11C2207/2263

Abstract: Provided is a storage control device including a first read processing unit configured to read data having any one value of a first value or a second value based on a first threshold value in a memory cell, the data being read as first read data, a first write processing unit configured to rewrite the memory cell to the first value when write data is the first value and the first read data is the second value, a second read processing unit configured to read second read data based on a second threshold value different from the first threshold value in the memory cell, and a second write processing unit configured to rewrite the memory cell to the second value when the write data is the second value and the second read data is the first value.