2.
    发明专利
    未知

    公开(公告)号:DE69123914T2

    公开(公告)日:1997-04-30

    申请号:DE69123914

    申请日:1991-09-23

    Applicant: SONY CORP

    Abstract: A portable disc player (1) has a casing (2). In the casing (2), there are enclosed: disc rotation driving means (23) for rotating an optical disc; an optical head (20) which is arranged so as to be movable in the radial direction of the optical disc; a signal processing section for executing a predetermined signal process to a signal which has been read out by the optical head; and control means (22) for controlling the operations of the rotation driving means (23), the optical head (20), and the signal processing section on the basis of an input from an X-Y device (11) and trigger buttons (12a, 12b). A display unit (14) comprising an outer cover (15) on which an LCD display (14) is arranged is rotatably attached to the casing (2).

    3.
    发明专利
    未知

    公开(公告)号:DE69123914D1

    公开(公告)日:1997-02-13

    申请号:DE69123914

    申请日:1991-09-23

    Applicant: SONY CORP

    Abstract: A portable disc player (1) has a casing (2). In the casing (2), there are enclosed: disc rotation driving means (23) for rotating an optical disc; an optical head (20) which is arranged so as to be movable in the radial direction of the optical disc; a signal processing section for executing a predetermined signal process to a signal which has been read out by the optical head; and control means (22) for controlling the operations of the rotation driving means (23), the optical head (20), and the signal processing section on the basis of an input from an X-Y device (11) and trigger buttons (12a, 12b). A display unit (14) comprising an outer cover (15) on which an LCD display (14) is arranged is rotatably attached to the casing (2).

    Optical disk, and method and apparatus for information reproduction

    公开(公告)号:AU771404B2

    公开(公告)日:2004-03-18

    申请号:AU5106900

    申请日:2000-06-08

    Applicant: SONY CORP

    Abstract: The present invention relates to an optical disc having a protection layer for protecting a recording layer located farther from a substrate, of a first recording layer and a second recording layer provided as being stacked on one side of the substrate, wherein the reflectance of one of the first and second recording layer is made higher than the reflectance of the other recording layer, and a reproducing device which uses this optical disc. The reproducing device casts a light beam emitted from a single light source onto the first recording layer or the second recording layer via a single objective lens, discriminates which of the first recording layer and the second recording layer the light beam emitted from the light source is cast on, on the basis of the result of detection of a reflected beam from the first recording layer or the second recording layer, moves the objective lens in a direction parallel to the optical axis ofthe objective lens on the basis of the result of discrimination, and condenses the light beam on the first recording layer or the second recording layer so as to carry out reproduction of information.

    Optical disk, and method and apparatus for information reproduction

    公开(公告)号:AU5106900A

    公开(公告)日:2001-01-02

    申请号:AU5106900

    申请日:2000-06-08

    Applicant: SONY CORP

    Abstract: The present invention relates to an optical disc having a protection layer for protecting a recording layer located farther from a substrate, of a first recording layer and a second recording layer provided as being stacked on one side of the substrate, wherein the reflectance of one of the first and second recording layer is made higher than the reflectance of the other recording layer, and a reproducing device which uses this optical disc. The reproducing device casts a light beam emitted from a single light source onto the first recording layer or the second recording layer via a single objective lens, discriminates which of the first recording layer and the second recording layer the light beam emitted from the light source is cast on, on the basis of the result of detection of a reflected beam from the first recording layer or the second recording layer, moves the objective lens in a direction parallel to the optical axis ofthe objective lens on the basis of the result of discrimination, and condenses the light beam on the first recording layer or the second recording layer so as to carry out reproduction of information.

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