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    MULTILAYER OPTICAL DISC
    6.
    发明公开
    MULTILAYER OPTICAL DISC 有权
    MEHRSCHICHTIGER OPTISCHERDATENTRÄGER

    公开(公告)号：EP2154683A1

    公开(公告)日：2010-02-17

    申请号：EP08721721.2

    申请日：2008-03-10

    Applicant: Hitachi Consumer Electronics Co. Ltd.

    Inventor： ISHIKAWA, Yoshinori ,  MIYAMOTO, Harukazu ,  HIROTSUNE, Akemi

    IPC: G11B7/24 ,  G11B7/085

    CPC classification number: G11B7/08511 ,  G11B7/00736 ,  G11B7/24038

    Abstract: A multilayer optical disc which has three or more recording layers and enables easy positioning of a focused beam spot onto a particular recording layer in which a BCA is disposed. An inter-layer distance between a particular recording layer and a recording layer adjacent to the particular recording layer is larger than the other inter-layer distances in which, at the focused beam spot positioning, the focused beam spot traverses the said adjacent recording layer earlier than the other recording layer adjacent to the particular recording layer.

    Abstract translation: 具有三个或更多个记录层的多层光盘，并且能够将聚焦光束点定位到设置有BCA的特定记录层上。 特定记录层和与特定记录层相邻的记录层之间的层间距离大于其他层间距离，其中在聚焦光束点定位时，聚焦光束点较早地穿过所述相邻记录层 比与特定记录层相邻的另一个记录层。

    OPTICAL DISC DRIVE WITH DELAYED LAYER JUMP
    7.
    发明公开
    OPTICAL DISC DRIVE WITH DELAYED LAYER JUMP 审中-公开
    迟发管理处光盘驱动器

    公开(公告)号：EP2145332A1

    公开(公告)日：2010-01-20

    申请号：EP08719860.2

    申请日：2008-04-01

    Applicant: Koninklijke Philips Electronics N.V.

    Inventor： MALIK, Omar, S.

    IPC: G11B7/085 ,  G11B7/09

    CPC classification number: G11B7/08511 ,  G11B7/0908 ,  G11B7/0946 ,  G11B7/0948 ,  G11B2007/0013

    Abstract: An optical disc drive (1), capable of handling optical discs (2) with at least two storage layers (61, 62), comprises an axially displaceable objective lens (34) and a focus actuator (52) for controlling the axial position of the objective lens; a control circuit (90) for generating actuator control signals (SQF) for the focus actuator; and a threshold source (98) for providing a threshold level (VT) lower than a supply voltage (Vs) for the focus actuator. The control circuit (90) monitors a focus disturbance signal and delays a layer jump if the absolute value of the focus disturbance signal is too high. Particularly, the control circuit compares the absolute value of the disturbance signals with said threshold level and, if this absolute value is higher than said threshold level, inhibits (83) the layer jump until the absolute value of the disturbance signals becomes lower than said threshold level.

    Optical disc drive and method of controlling the same
    8.
    发明公开
    Optical disc drive and method of controlling the same 审中-公开
    Optischer Plattenantrieb und Steuerverfahrendafür

    公开(公告)号：EP2112656A1

    公开(公告)日：2009-10-28

    申请号：EP08017430.3

    申请日：2008-10-03

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Kim, Jae-Hyun

    IPC: G11B7/085 ,  G11B7/135

    CPC classification number: G11B7/08511 ,  G11B7/0941 ,  G11B7/13925 ,  G11B2007/0013

    Abstract: A method of controlling an optical disc drive to drive a multi-layer optical disc includes acquiring actual optimal aberration correction positions of a first layer and a second layer of the multi-layer optical disc while a position of an aberration correction unit is changed, positioning the aberration correction unit at an intermediate point between the aberration correction position of the first layer and the aberration correction position of the second layer, performing a layer jump from the first layer to the second layer of the optical disc, and positioning the aberration correction unit at the aberration correction position of the second layer.

    Abstract translation: 控制光盘驱动器以驱动多层光盘的方法包括：在像差校正单元的位置改变时，获取多层光盘的第一层和第二层的实际最佳像差校正位置，定位 所述像差校正单元在所述第一层的像差校正位置和所述第二层的像差校正位置之间的中间点处，执行从所述第一层到所述光盘的所述第二层的层跳跃，以及将所述像差校正单元 在第二层的像差校正位置。

    OPTICAL PICKUP DRIVE DEVICE AND OPTICAL PICKUP FOCUS PULL-IN METHOD
    9.
    发明公开
    OPTICAL PICKUP DRIVE DEVICE AND OPTICAL PICKUP FOCUS PULL-IN METHOD 有权
    光驱本客户与光学客户聚焦牵引-PROCESS

    公开(公告)号：EP1619677A4

    公开(公告)日：2009-04-29

    申请号：EP04788448

    申请日：2004-09-29

    Applicant: PANASONIC CORP

    Inventor： KOMMA YOSHIAKI ,  YOSHIKAWA AKIRA

    IPC: G11B7/085 ,  G11B7/00 ,  G11B7/09 ,  G11B19/12

    CPC classification number: G11B7/0945 ,  G11B7/08511 ,  G11B19/127 ,  G11B2007/0006 ,  G11B2007/0013

    Abstract: It is possible to access a deep layer of a multi-layered disc in a short time. An objective lens (131) is moved toward a recording surface. When it is detected that the level voltage of a focus error signal has reached a first slice level voltage H displaced from a reference potential E by a predetermined value, the objective lens (131) is moved toward the recording surface by a predetermined shift amount as an upper limit. When the shift amount of the objective lens (131) has reached the predetermined shift amount, movement means is controlled to move the objective lens (131) apart from recording surface. When it is detected that the level voltage of the focus error signal has reached a second slice level voltage H displaced from the reference potential E by a predetermined value while the objective lens (131) moves apart from the recording surface, pull-in control is performed for focusing the light spot.

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