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    Optical disk drive
    3.
    发明公开
    Optical disk drive 失效
    光盘和光盘驱动器

    公开(公告)号：EP0487321A3

    公开(公告)日：1993-07-21

    申请号：EP91310685.2

    申请日：1991-11-20

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Fuji, Hiroshi ,  Matoba, Hirotsugu

    IPC分类号： G11B7/007 ,  G11B7/00 ,  G11B7/085 ,  G11B11/10

    CPC分类号： G11B27/24 ,  G11B7/08541 ,  G11B7/0938 ,  G11B7/24082 ,  G11B11/10563 ,  G11B11/10578 ,  G11B11/10597 ,  G11B27/19

    摘要： An optical disk according to the present invention has thereon an uninterrupted preformed groove adjoining a track. The address information of the track and sectors is prerecorded by variations in the preformed groove in a radial direction of the optical disk. An optical disk drive converts a detection signal, that is generated when the spot of a light beam crosses the track, into a binary signal in accordance with the comparison between the detection signal and two different slice levels, whereby a correct track crossing number is obtained. Another optical disk has thereon index marks that are prerecorded by partially varying the width of the preformed groove. Another optical disk drive detects the index mark on a specific track line, whereby formatting data with respect to address information is generated. The optical disks and optical disk drives are thus compatible with writing of the address information by means of soft-formatting.

    Optical disk recording and reproducing apparatus
    6.
    发明公开
    Optical disk recording and reproducing apparatus 失效
    光盘记录和再现设备

    公开(公告)号：EP0408392A3

    公开(公告)日：1992-08-19

    申请号：EP90307718.8

    申请日：1990-07-13

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Matoba, Hirotsugu ,  Nomura, Masaru ,  Deguchi, Toshihisa, Daiya-haitsu Gakuenmae C-722 ,  Terashima, Shigeo

    IPC分类号： G11B7/085

    CPC分类号： G11B7/08529 ,  G11B7/08517

    摘要： The optical disk recording and reproducing apparatus includes (1) an optical head, (2) a linear motor for moving the optical head in a radial direction of an optical disk (3) a position detection sensor for detecting a position of the optical head, (4) a speed detector for detecting a moving speed of the optical head, (5) a CPU for calculating an access distance, based on the present position of the optical head and a designated track, in accordance with an output of the position detection sensor, (6) a ROM for generating a table value for an adjustable target speed of the optical head in accordance with the distance, (7) a speed offset memory for storing a speed offset value for adjusting an error in the access distance, (8) a coarse access control device for controlling the linear motor to move the optical head, based on an error signal obtained from a difference between the adjustable target speed and an actual speed of the optical head detected by the speed detector, before the optical head reaches a switching point located just before the designated track in a coarse access, the adjustable target speed being obtained by adding or subtracting the speed offset value stored in the speed offset memory to or from the table value generated by the ROM, and for setting the adjustable target speed to "0", after the optical head passes the switching point, and (9) a fine access control device for judging whether the optical head is positioned on the designated track upon completion of the coarse access, and for performing a fine access, controlling the linear motor to move the optical head to a vicinity of the designated track, when the optical head is not positioned on the designated track. With such an arrangement, the accuracy of the coarse access can be improved and time required for the coarse access can be reduced. Another optical disk recording and reproducing device further includes a speed offset value correcting device for correcting the speed offset value released in accordance with an access error in the coarse access when a distance between a position of the optical head and the designated track is more than a reference value upon completion of the coarse access. The speed offset value is accordingly corrected by a learning control, and this further improves the accuracy of the coarse access, saving the overall access time.

    Optical disk recording and reproducing apparatus
    7.
    发明公开
    Optical disk recording and reproducing apparatus 失效
    Aufnahme- undWiedergabegerätfüroptische Scheibe。

    公开(公告)号：EP0408392A2

    公开(公告)日：1991-01-16

    申请号：EP90307718.8

    申请日：1990-07-13

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Matoba, Hirotsugu ,  Nomura, Masaru ,  Deguchi, Toshihisa, Daiya-haitsu Gakuenmae C-722 ,  Terashima, Shigeo

    IPC分类号： G11B7/085

    CPC分类号： G11B7/08529 ,  G11B7/08517

    摘要： The optical disk recording and reproducing apparatus includes (1) an optical head, (2) a linear motor for moving the optical head in a radial direction of an optical disk (3) a position detection sensor for detecting a position of the optical head, (4) a speed detector for detecting a moving speed of the optical head, (5) a CPU for calculating an access distance, based on the present position of the optical head and a designated track, in accordance with an output of the position detection sensor, (6) a ROM for generating a table value for an adjustable target speed of the optical head in accordance with the distance, (7) a speed offset memory for storing a speed offset value for adjusting an error in the access distance, (8) a coarse access control device for controlling the linear motor to move the optical head, based on an error signal obtained from a difference between the adjustable target speed and an actual speed of the optical head detected by the speed detector, before the optical head reaches a switching point located just before the designated track in a coarse access, the adjustable target speed being obtained by adding or subtracting the speed offset value stored in the speed offset memory to or from the table value generated by the ROM, and for setting the adjustable target speed to "0", after the optical head passes the switching point, and (9) a fine access control device for judging whether the optical head is positioned on the designated track upon completion of the coarse access, and for performing a fine access, controlling the linear motor to move the optical head to a vicinity of the designated track, when the optical head is not positioned on the designated track. With such an arrangement, the accuracy of the coarse access can be improved and time required for the coarse access can be reduced. Another optical disk recording and reproducing device further includes a speed offset value correcting device for correcting the speed offset value released in accordance with an access error in the coarse access when a distance between a position of the optical head and the designated track is more than a reference value upon completion of the coarse access. The speed offset value is accordingly corrected by a learning control, and this further improves the accuracy of the coarse access, saving the overall access time.

    摘要翻译： 光盘记录和再现装置包括（1）光头，（2）用于沿光盘径向移动光头的直线电动机，用于检测光头的位置的位置检测传感器， （4）用于检测光学头的移动速度的速度检测器，（5）根据位置检测的输出，基于光学头的当前位置和指定的轨迹计算存取距离的CPU 传感器，（6）用于根据距离生成光头的可调目标速度的表值的ROM，（7）用于存储用于调整访问距离中的误差的速度偏移值的速度偏移存储器（7） 8）粗略访问控制装置，用于根据从可调目标速度和由速度检测器检测到的光头的实际速度之间的差获得的误差信号，在选择之前控制线性电动机来移动光学头 通过在粗略访问中到达位于指定轨道之前的切换点，可调目标速度通过将存储在速度偏移存储器中的速度偏移值相加或减去由ROM产生的表值获得，并且 在光头通过切换点之后，将可调目标速度设定为“0”，和（9）精细访问控制装置，用于在完成粗略访问时判断光头是否位于指定轨道上，并且用于执行 当光头未位于指定轨道上时，控制线性电动机将光头移动到指定轨道附近。 通过这样的布置，可以提高粗略访问的精度，并且可以减少粗略访问所需的时间。 另一种光盘记录和再现装置还包括速度偏移值校正装置，用于当光头和指定轨道的位置之间的距离大于一个时，校正根据粗略访问中的访问误差而释放的速度偏移值 完成粗略访问后的参考值。 因此，通过学习控制校正速度偏移值，进一步提高了粗略访问的准确性，节省了整体访问时间。

    Ink jet head for high speed printing and method for it's fabrication
    9.
    发明公开
    Ink jet head for high speed printing and method for it's fabrication 失效
    Tintenstrahldruckkopffürdas Hochgeschwindigkeitsdrucken und Verfahren zu dessen Herstellung

    公开(公告)号：EP0713774A3

    公开(公告)日：1997-04-02

    申请号：EP95108400.3

    申请日：1995-05-31

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Hirata, Susumu ,  Matoba, Hirotsugu ,  Inui, Tetsuya ,  Ishii, Yorishige ,  Abe, Shingo ,  Kimura, Masaharu ,  Horinaka, Hajime ,  Onda, Hiroshi

    IPC分类号： B41J2/05 ,  B41J29/377 ,  B41J29/16

    CPC分类号： B41J2/14 ,  B41J29/377 ,  B41J2002/14346

    摘要： The invention provides an ink jet head which exhibits a good response characteristic through heating and fast cooling enough to implement high-speed printing. A nozzle plate (10) having a nozzle orifice (11), and a substrate (7) constitute part of a peripheral wall of an ink chamber (31). A pressure generating member (20) is provided in the ink chamber (31). The pressure generating member (20) has a buckling member (1), a heater layer (3), and a diaphragm (5). The buckling member (1) is formed into a generally plate shape and its peripheral portion is attached to the substrate (7). The buckling member (1) can be switched between a no-displacement state in which it undergoes substantially no thermal stress, and a buckled state in which it is thermally expanded and buckled. The heater layer (3) is provided along a surface of the buckling member (1) on the substrate (7) side. The diaphragm (5) is composed of a generally plate-shaped flexible material and provided along a surface of the buckling member (1) on the nozzle plate (10) side in such a state that at least its peripheral portion (5c) is attached to a peripheral portion (1c) of the buckling member (1).

    摘要翻译： 本发明提供一种喷墨头，其通过加热和快速冷却显示出良好的响应特性，足以实现高速打印。 具有喷嘴孔（11）和基板（7）的喷嘴板（10）构成墨室（31）的周壁的一部分。 压力发生部件（20）设置在墨水室（31）中。 压力发生构件（20）具有弯曲构件（1），加热器层（3）和隔膜（5）。 弯曲构件（1）形成为大致板状，其周边部附着于基板（7）。 屈曲构件（1）可以在其经历基本上没有热应力的无位移状态和其热膨胀和弯曲的弯曲状态之间切换。 加热层（3）沿着基板（7）侧的弯曲构件（1）的表面设置。 隔膜（5）由通常为板状的柔性材料构成，并且在至少其周边部（5c）附接的状态下沿着压花构件（1）的喷嘴板（10）侧的表面设置 到所述弯曲构件（1）的周边部分（1c）。

    Optical disk drive
    10.
    发明公开
    Optical disk drive 失效
    光盘驱动器

    公开(公告)号：EP0491573A3

    公开(公告)日：1993-01-20

    申请号：EP91311824.6

    申请日：1991-12-19

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Matoba, Hirotsugu ,  Nomura, Masaru ,  Yamaguchi, Takeshi ,  Kojima, Kunio ,  Terashima, Shigeo

    IPC分类号： G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/08541

    摘要： An optical disk drive which discriminates whether a light spot is incident on a groove or on an area therebetween by eliminating a pulse that appears in a binary envelope signal when the light spot passes a level section. The elimination is carried out based on an ODF section detecting signal, the ODF section detecting signal being a level section detecting signal which is produced by detecting a level section (ODF section) of the optical disk. The detection is carried out by differentiating an envelope signal, which is the envelope of an electric signal corresponding to the amount of light reflected from the optical disk. Accordingly, even if the optical disk in use has interrupted grooves, the optical head can be accurately moved to a desired track located on a land or on a groove.