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    Optical disc having focus offset area
    1.
    发明申请
    Optical disc having focus offset area 审中-公开
    具有对焦偏移区域的光盘

    公开(公告)号：US20060187807A1

    公开(公告)日：2006-08-24

    申请号：US10549644

    申请日：2004-03-11

    申请人： Wilhelmus Koppers ,  Pierre Woerlee ,  Hubert Cecile Martens ,  Ronald Joseph Van Den Oetelaar ,  Johannus Bakx

    发明人： Wilhelmus Koppers ,  Pierre Woerlee ,  Hubert Cecile Martens ,  Ronald Joseph Van Den Oetelaar ,  Johannus Bakx

    IPC分类号： G11B7/24

    CPC分类号： G11B7/00736 ,  G11B7/094 ,  G11B7/0945 ,  G11B7/24038 ,  G11B7/24082 ,  G11B2007/0013

    摘要： A record carrier is for recording information by writing marks in a track on a recording layer. The shortest mark used for recording the information has a length of a predefined minimum number d of channel bit lengths. The record carrier (11) has a pregroove that is modulated by a carrier pattern containing long marks (18,19) that provides a focus area (12) at a predefined location on the recording layer. The long marks have lengths of at least two times the length of the shortest mark for being substantially longer than the effective diameter of the scanning spot. A scanning device locates the focus area and determines the best focus offset by detecting the maximum read signal amplitude while scanning the carrier pattern.

    摘要翻译： 记录载体用于通过在记录层上的轨道中书写标记来记录信息。 用于记录信息的最短标记具有通道位长度的预定最小数目d的长度。 记录载体（11）具有由包含在记录层上的预定义位置提供聚焦区域（12）的长标记（18,19）的载体图案调制的预制槽。 长标记具有比最短标记的长度的至少两倍的长度，其长度远大于扫描点的有效直径。 扫描装置定位聚焦区域，并通过在扫描载体图案时检测最大读取信号幅度来确定最佳聚焦偏移。

    Optical disc drive
    3.
    发明申请
    Optical disc drive 审中-公开
    光盘驱动器

    公开(公告)号：US20070035834A1

    公开(公告)日：2007-02-15

    申请号：US10576312

    申请日：2004-10-19

    申请人： Johannus Bakx

    发明人： Johannus Bakx

    IPC分类号： G02B5/30

    CPC分类号： G01J1/4228 ,  G11B7/131 ,  G11B2007/0006

    摘要： An optical system (30) comprises at least two optical detector units (60; 70), each optical detector unit (60; 70) comprising an array (61; 71) of detector segments (62a-d; 72a-d) and corresponding output terminals (63a-d; 73a-d) defining current outputs of the corresponding optical detector unit (60; 70). At least one current output (63a) of a first optical detector unit (60) is connected directly to a corresponding current output (73a) of a second optical detector unit (70) at an output node (80a). The optical system (30) further comprises a signal processing circuit (90) having its input terminals (91a-d) connected via corresponding lines (81a-d) to corresponding output nodes (80a-d) of the optical detector system (35). To each of said lines (81a-d), a corresponding terminator resistor (82a-d) is connected.

    摘要翻译： 光学系统（30）包括至少两个光学检测器单元（60; 70），每个光学检测器单元（60; 70）包括检测器段（62和72 ad）的阵列（61; 71）和对应的输出端 （63; ad; 73 ad）定义相应的光学检测器单元（60; 70）的电流输出。 第一光学检测器单元（60）的至少一个电流输出（63a）直接连接到输出节点（80a）处的第二光学检测器单元（70）的对应的电流输出（73a）。 光学系统（30）还包括信号处理电路（90），其信号处理电路（90a）具有通过相应的线路（81a-d）连接到光学检测器系统（35）的对应输出节点（80a-d）的输入端子（91a-d）。 对于每条所述线（81a-d），连接相应的终端电阻（82a-d）。

    Playback apparatus with second variation detection
    4.
    发明申请
    Playback apparatus with second variation detection 失效
    具有第二变异检测的播放装置

    公开(公告)号：US20050018551A1

    公开(公告)日：2005-01-27

    申请号：US10496486

    申请日：2002-11-26

    申请人： Johannus Bakx

    发明人： Johannus Bakx

    IPC分类号： G11B7/005 ,  G11B7/00 ,  G11B19/12 ,  G11B20/00

    CPC分类号： G11B19/125 ,  G11B20/00086 ,  G11B20/00876 ,  G11B20/10425

    摘要： The invention relates to a playback apparatus for retrieving information from an information carrier (2). The information has been recorded on the information carrier (2) in the form of variations of a first physical parameter. The playback apparatus scans the information carrier by means of a transducer (4), which is responsive to said variations of said physical parameter. An information recovering circuit (5) recovers the information from a first detection signal (D1) received from the transducer (4). The information recovering circuit (5) comprises a phase-locked loop (51). The information carrier (2) exhibits a second variation of a second physical parameter, which differs from said first physical parameter but which is detectable by means of said transducer (4). A detection circuit (6) detects the presence of the second variation on the basis of a second detection signal (D2) received from the transducer (4). The idea of the invention is that the detection circuit (6) is capable of using the phase-locked loop (51) of the information recovering circuit (5) to detect the presence of the second variation. The invention can be implemented very easily in, for example, DVD players to detect the presence of an information carrier (2) with DVD+RW format or an information carrier (2) with DVD-RW format. Only switching means (7) and some minor electronics have to be added; there is no need for an additional phase-locked loop.

    摘要翻译： 本发明涉及一种用于从信息载体（2）检索信息的重放装置。 信息已经以第一物理参数的变化形式记录在信息载体（2）上。 回放装置借助于对所述物理参数的所述变化作出响应的换能器（4）扫描信息载体。 信息恢复电路（5）从从换能器（4）接收的第一检测信号（D1）中恢复信息。 信息恢复电路（5）包括锁相环（51）。 信息载体（2）表现出与所述第一物理参数不同但可通过所述换能器（4）检测的第二物理参数的第二变化。 检测电路（6）基于从换能器（4）接收的第二检测信号（D2）检测第二变化的存在。 本发明的思想是检测电路（6）能够使用信息恢复电路（5）的锁相环（51）来检测第二变化的存在。 本发明可以在例如DVD播放机中非常容易地实现，以检测具有DVD + RW格式的信息载体（2）的存在或具有DVD-RW格式的信息载体（2）。 必须添加开关装置（7）和一些次要电子装置; 不需要额外的锁相环。

    Arrangement for reading an information carrier
    6.
    发明申请
    Arrangement for reading an information carrier 失效

    公开(公告)号：US20060044989A1

    公开(公告)日：2006-03-02

    申请号：US10537128

    申请日：2003-12-03

    申请人： Johannus Bakx

    发明人： Johannus Bakx

    IPC分类号： G11B7/00

    CPC分类号： G11B7/12 ,  G11B20/00

    摘要： Disclosed is an arrangement for reading an information carrier, comprising a read head for scanning the information carrier along a scanning path and thereby generating one or more electrical signals in response to a pattern recorded along the scanning path; a signal processing unit for processing the one or more electrical signals; electrical conductors for conveying the one or more electrical signals to the signal processing unit; characterized in that the arrangement further comprises controllable termination means for terminating at least one electrical conductor with a selectable impedance, the controllable termination means comprising at least two impedances and selecting means for selecting an impedance to terminate the at least one electrical conductor. The controllable termination means can select one of the at least two impedances. This makes the arrangement according to the invention capable of tuning to varying circumstances. If for certain circumstances a high impedance is needed, then a high impedance is selected. The varying circumstances can, for instance, be the speed at which the information carrier is rotated or the type of read head that is used.