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公开(公告)号：EP0903735A4
公开(公告)日：2000-01-05
申请号：EP98900047
申请日：1998-01-06
Applicant: SONY CORP
Inventor： KUMAGAI EIJI , NAGASHIMA KENJI , TSUKADA FUTOSHI
IPC: G11B19/12
CPC classification number: G11B19/12
Abstract: A system controller (30) discriminates the kinds of a plurality of optical disks (D) having different numbers of signal recording layers based on a focus error signal generated by means of an RF block (21) from the output of a servo processor (31), which is outputted when the processor detects the reflected light of laser light from the signal surface of the disk (D), at the time of focusing the laser light on the signal surface of the disc (D) by displacing an objective lens in the direction of optical axis, while the signal surface of the disk (D) is irradiated with the laser light through the objective lens and sets the operation mode of the disks (D) in accordance with the kinds of the disks (D).
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公开(公告)号：DE602004012375D1
公开(公告)日：2008-04-24
申请号：DE602004012375
申请日：2004-12-29
Applicant: SONY CORP
Inventor： AMANO HIROSHI , TAKAHASHI TAKAO , YAMAMOTO EIJI , UEMURA HIDEYUKI , NAGASHIMA KENJI , ARIE TAKUMI
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公开(公告)号：DE69828124T2
公开(公告)日：2005-12-22
申请号：DE69828124
申请日：1998-01-06
Applicant: SONY CORP
Inventor： KUMAGAI EIJI , NAGASHIMA KENJI , TSUKADA FUTOSHI
IPC: G11B19/12
Abstract: A laser light beam is illuminated via an objective lens on the signal surface of an optical disc and the objective lens is displaced by a servo processor along the optical axis for focussing search to generate focussing error signals by a RF block from a detected output of the laser light by the signal surface of the optical disc. Based on these focussing error signals, a system controller discriminates the types of the optical disc having different numbers of signal recording layers for setting an operating mode in keeping with the types of the optical disc.
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公开(公告)号：CA1326546C
公开(公告)日：1994-01-25
申请号：CA614288
申请日：1989-09-28
Applicant: SONY CORP
Inventor： KUME HIDEHIRO , YAMAMOTO ETSUFUMI , NAGASHIMA KENJI
Abstract: An optical pickup device is disclosed in which a light beam from a laser light source is converged by an object lens on a signal recording surface of an optical disk to follow recording tracks formed on the signal recording surface to read out or write data on or from the signal recording surface. A semiconductor laser unit is used as a laser light source and is so arranged that the meridional plane of the light beam emanating from the semiconductor laser unit is inclined 30.degree. to 60.degree. with respect to the tangential direction of the recording track.
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公开(公告)号：DE60134518D1
公开(公告)日：2008-08-07
申请号：DE60134518
申请日：2001-09-24
Applicant: SONY CORP
Inventor： NAGASHIMA KENJI , KUMAGAI EIJI , KUMAI SATOSHI , MORIZUMI TOSHIO
IPC: G11B7/125 , G11B7/0045 , G11B7/126
Abstract: After the initiation of writing, an output signal from an LPF is sampled in correspondence with a portion with a predetermined pulse width of recording data, so as to obtain a pit level. In the resultant signal, its varying portions which correspond to the multi-pulse trains of the write signal are smoothed. A controller modifies a level of a target level signal to be supplied to an APC circuit in such a manner that the pit level becomes an optimum pit level which has been obtained prior to the initiation of writing.
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Patent Agency Ranking
公开(公告)号：ES2301928T3
公开(公告)日：2008-07-01
申请号：ES04030973
申请日：2004-12-29
Applicant: SONY CORP
Inventor： AMANO HIROSHI , TAKAHASHI TAKAO , YAMAMOTO EIJI , UEMURA HIDEYUKI , NAGASHIMA KENJI , ARIE TAKUMI
Abstract: Un sistema para un equipo en el interior de un vehículo, que comprende: un equipo (2) en el interior de un vehículo montado en la parte delantera dispuesto en una porción delantera del espacio interior de un vehículo; un equipo (3) en el interior de un vehículo montado en la parte trasera dispuesto en una porción trasera del espacio interior del vehículo; y una conexión (24, 4, 51) adaptada para conectar el citado equipo (2) en el interior de un vehículo montado en la parte delantera y el citado equipo (3) en el interior de un vehículo montado en la parte trasera, en el que el citado equipo (3) en el interior de un vehículo montado en la parte trasera está adaptados para controlar el citado equipo (2) en el interior de un vehículo montado en la parte delantera mediante un medio (6, 47) de entrada, que se caracteriza porque el citado equipo (3) en el interior de un vehículo montado en la parte trasera está adaptados para controlar el ajuste y la liberación de una función de protección de datos del citado un equipo en el interior de un vehículo montado en la parte delantera.
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公开(公告)号：DE69828124D1
公开(公告)日：2005-01-20
申请号：DE69828124
申请日：1998-01-06
Applicant: SONY CORP
Inventor： KUMAGAI EIJI , NAGASHIMA KENJI , TSUKADA FUTOSHI
IPC: G11B19/12
Abstract: A laser light beam is illuminated via an objective lens on the signal surface of an optical disc and the objective lens is displaced by a servo processor along the optical axis for focussing search to generate focussing error signals by a RF block from a detected output of the laser light by the signal surface of the optical disc. Based on these focussing error signals, a system controller discriminates the types of the optical disc having different numbers of signal recording layers for setting an operating mode in keeping with the types of the optical disc.
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公开(公告)号：DE68925460T2
公开(公告)日：1996-07-11
申请号：DE68925460
申请日：1989-10-23
Applicant: SONY CORP
Inventor： KUME HIDEHIRO C O SONY CORP PA , YAMAMOTO ETSUFUMI , NAGASHIMA KENJI
Abstract: An optical pickup device in which a light beam from a laser light source (3) is converged by an object lens (1) on to a signal recording surface of an optical disc (101) to follow recording tracks formed on the signal recording surface to read out or write data on to or from the signal recording surface. A semiconductor laser unit (3) is used as the laser light source and is arranged so that the meridional plane of the light beam emanating from the semiconductor laser unit (3) is inclined between 30 and 60 with respect to the tangential direction of the recording track. This arrangement overcomes problems of incorrect focusing or tracking servo operation arising from the astigmatic difference effect characteristic of the semiconductor laser unit (3).
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公开(公告)号：DE68925460D1
公开(公告)日：1996-02-29
申请号：DE68925460
申请日：1989-10-23
Applicant: SONY CORP
Inventor： KUME HIDEHIRO C O SONY CORP PA , YAMAMOTO ETSUFUMI , NAGASHIMA KENJI
Abstract: An optical pickup device in which a light beam from a laser light source (3) is converged by an object lens (1) on to a signal recording surface of an optical disc (101) to follow recording tracks formed on the signal recording surface to read out or write data on to or from the signal recording surface. A semiconductor laser unit (3) is used as the laser light source and is arranged so that the meridional plane of the light beam emanating from the semiconductor laser unit (3) is inclined between 30 and 60 with respect to the tangential direction of the recording track. This arrangement overcomes problems of incorrect focusing or tracking servo operation arising from the astigmatic difference effect characteristic of the semiconductor laser unit (3).
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公开(公告)号：MY123157A
公开(公告)日：2006-05-31
申请号：MYPI9800097
申请日：1998-01-09
Applicant: SONY CORP
Inventor： KUMAGAI EIJI , NAGASHIMA KENJI , TSUKADA FUTOSHI
IPC: G11B19/12
Abstract: A LASER LIGHT BEAM IS ILLUMINATED VIA AN OBJECTIVE LENS ON THE SIGNAL SURFACE OF AN OPTICAL DISC (100, 110, 120) AN THE OBJECTIVE LENS IS DISPLACED BY A SERVO PROCESSOR ALONG THE OPTICAL AXIS FOR FOCUSSING SEARCH TO GENERATE FOCUSSING ERROR SIGNAL (FE) BY A RF BLOCK FROM A DETECTED OUTPUT OF THE LASER LIGHT BY THE SIGNAL SURFACE OF THE OPTICAL DISC. BASED ON THESE FOCUSSING ERROR SIGNALS (FE), A SYSTEM CONTROLLER DISCRIMINATES THE TYPES OF THE OPTICAL DISC HAVING DIFFERENT NUMBERS OF SIGNAL RECORDING LAYERS FOR SETTING AN OPERATING MODE IN KEEPING WITH THE TYPES OF THE OPTICAL DISC.
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