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    41.
    发明专利
    未知

    公开(公告)号：DE69726695D1

    公开(公告)日：2004-01-22

    申请号：DE69726695

    申请日：1997-10-01

    Applicant: SONY CORP

    Inventor： HORIMAI HIDEYOSHI ,  TOBITA MINORU ,  FUJITA GORO ,  TOSAKA SUSUMU

    IPC: G11B7/0037 ,  G11B7/007 ,  G11B7/09 ,  G11B7/135 ,  G11B7/14 ,  G11B7/26 ,  G11B11/105 ,  G11B7/00

    Abstract: A format of a recording medium suitable for a larger capacity, a higher transfer rate, and integration of pits/lands/grooves is provided. In a first method, in a recordable and reproduceable area, a twin-track structure of lands/grooves is configured such that tracks on which lands become recording tracks and tracks on which grooves become recording tracks form a double spiral. In a read-only area, pits are arrayed such that tracks in the radial direction of the disk are formed in a data area. In a second method, in a recordable and reproduceable area, a land/groove-alternate track structure is configured such that grooves become data recording tracks in the circular track next to the circular track in which lands become data recording tracks, and lands become data recording tracks in the next circular track. In the read-only area, pits are arrayed such that tracks in the radial direction of the disk are formed in the data area.

    42.
    发明专利
    未知

    公开(公告)号：DE69330503T2

    公开(公告)日：2002-03-28

    申请号：DE69330503

    申请日：1993-02-19

    Applicant: SONY CORP

    Inventor： HORIMAI HIDEYOSHI ,  FUJITA GORO

    IPC: G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B7/14 ,  G11B7/26 ,  G11B20/14 ,  H03M5/14 ,  G11B7/00 ,  G11B7/095

    Abstract: An optical recording medium on which information data is to be recorded and on which an n-th recording track is located at a distance from the (n-1)th recording track preceding the n-th recording track in a recording region which is narrower than the diameter of a spot of a light beam radiated on the recording area, with recording data obtained on logical processing with recording data recorded on the (n-1)th recording track being recorded on the n-th recording track for increasing the storage capacity of information data, is disclosed. A return beam of a light beam radiated across two neighboring recording tracks on the optical recording medium is detected by a detector having first and second light receiving sections having a boundary line extending parallel to the recording track of the optical recording medium for reading out the information recorded on the optical recording medium based on the level of a sum or difference signal of the output signals of the first and second light receiving sections.

    43.
    发明专利
    未知

    公开(公告)号：DE69324858D1

    公开(公告)日：1999-06-17

    申请号：DE69324858

    申请日：1993-02-19

    Applicant: SONY CORP

    Inventor： HORIMAI HIDEYOSHI ,  FUJITA GORO

    IPC: G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B7/14 ,  G11B7/26 ,  G11B20/14 ,  H03M5/14 ,  G11B7/00 ,  G11B7/095

    Abstract: An optical recording medium on which information data is to be recorded and on which an n-th recording track is located at a distance from the (n-1)th recording track preceding the n-th recording track in a recording region which is narrower than the diameter of a spot of a light beam radiated on the recording area, with recording data obtained on logical processing with recording data recorded on the (n-1)th recording track being recorded on the n-th recording track for increasing the storage capacity of information data, is disclosed. A return beam of a light beam radiated across two neighboring recording tracks on the optical recording medium is detected by a detector having first and second light receiving sections having a boundary line extending parallel to the recording track of the optical recording medium for reading out the information recorded on the optical recording medium based on the level of a sum or difference signal of the output signals of the first and second light receiving sections.

    45.
    发明专利
    未知

    公开(公告)号：DE69029713T2

    公开(公告)日：1997-06-12

    申请号：DE69029713

    申请日：1990-11-15

    Applicant: SONY CORP

    Inventor： WATANABE TETSU ,  YAMAGAMI TAMOTSU ,  FUJITA GORO

    IPC: G11B11/105 ,  G11B11/10

    Abstract: This invention relates to a recording apparatus using magneto-optical effect in which information is recorded on a magneto-optical disc (1) and, more particularly, to a recording apparatus using magneto-optical effect of the magnetic field modulating type in which a light beam is irradiated onto a magneto-optical disc (1) and a magnetic field modulated by a predetermined modulating method is applied to the magneto-optical disc (1). The light beam is irradiated intermittently onto the magneto-optical disc (1) by drive pulses (LP) based on reference clocks (Sck) and the drive pulses (LP) at the positions corresponding to change points of information thinned out in the case where a ratio N of the minimum length between transition to the window margin is larger than 1, thereby accomplishing recording of a correct magnetization pattern.

    MEDIO DE GRABACION DE DISCO OPTICO, DISPOSITIVO Y METODO DE REPRODUCCION Y DISPOSITIVO Y METODO DE GRABACION PARA EL MEDIO DE GRABACION.
    48.
    发明专利
    MEDIO DE GRABACION DE DISCO OPTICO, DISPOSITIVO Y METODO DE REPRODUCCION Y DISPOSITIVO Y METODO DE GRABACION PARA EL MEDIO DE GRABACION. 未知

    公开(公告)号：ES2363373T3

    公开(公告)日：2011-08-02

    申请号：ES06713212

    申请日：2006-02-07

    Applicant: SONY CORP

    Inventor： FUJITA GORO ,  SHIMOUMA TAKASHI ,  NAKANO JUN ,  TAKAGAWA SHIGEKI ,  SAITO KIMIHIRO

    IPC: G11B7/004 ,  G11B20/10

    Abstract: Un aparato de reproducción para reproducir un medio o soporte (100) de grabación de disco óptico, que incluye un sustrato (101) que tiene unos datos principales grabados en forma de una combinación de hoyos y tierras en un lado del mismo y por lo menos una capa reflectante (102) y una capa de cubierta (103) apiladas sobre el sustrato (101) y en el que se graban unos datos secundarios en forma de marcas formadas así en la capa reflectante (102) por la irradiación de luz láser (111) con potencia de escritura en la capa reflectante (102) de forma que el nivel de una señal de lectura se elevará en las partes en las que se forman las marcas, el aparato comprende: unos medios o soportes (OP) de generación de señal de lectura para generar la señal de lectura mediante la detección de una parte de retorno, desde el medio o soporte de grabación de disco óptico, de la luz láser con potencia de lectura que ha sido irradiada al medio o soporte de grabación de disco óptico; unos medios o soportes (13) de detección de datos secundarios para detectar el nivel de los datos secundarios sobre la base de los resultados del muestreo de la señal de lectura generada por los medios o soportes (OP) de generación de señal de lectura en un punto de muestreo predeterminado; caracterizado por unos medios o soportes de evaluación (16) para evaluar, basándose en un resultado de determinar si el valor de los datos secundarios detectados por los medios de detección de datos secundarios tiene una polaridad correcta, si el medio o soporte de grabación en disco óptico (100) es un disco autenticado.

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