中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

13 records (took 0.022 seconds)

    APPARATUS AND METHOD FOR REPRODUCING DATA RECORDED AT A PREDETERMINED LINEAR VELOCITY ON A DISC-LIKE RECORDING MEDIUM.
    2.
    发明专利
    APPARATUS AND METHOD FOR REPRODUCING DATA RECORDED AT A PREDETERMINED LINEAR VELOCITY ON A DISC-LIKE RECORDING MEDIUM. 未知

    公开(公告)号：MY117767A

    公开(公告)日：2004-08-30

    申请号：MYPI9703062

    申请日：1997-07-05

    Applicant: SONY CORP

    Inventor： ISHIKAWA HIDEKI ,  HACHIMORI TAKESHI ,  OKABE MITSURU

    IPC: G11B7/005 ,  G11B19/02 ,  G11B19/28 ,  G11B20/10 ,  G11B20/12

    Abstract: A DISC PLAYBACK APPARATUS FOR PLAYING BACK A DISC (10) ON WHICH DATA HAVE BEEN RECORDED UNDER A CLV CONTROL IS PROVIDED WITH A CLV CONTROL SECTION (1) FOR PERFORMING A CLV CONTROL, A SPEED COMPARATOR (2) AND A REFERENCE CLOCK GENERATOR (3) FOR PERFORMING A CAV CONTROL, A CHANGEOVER SWITCH (4) FOR SWITCHING BETWEEN THE CLV CONTROL AND THE CAV CONTROL, AND A CPU (6) FOR SETTING A SWITCHING POINT OF THE CHANGEOVER SWITCH (4) AND CONTROLLING THE SWITCHING OF THE CHANGEOVER SWITCH (4). ACCORDING TO ANOTHER ASPECT OF THE INVENTION, SWITCHING IS MADE BETWEEN A PLAYBACK WITH A CLV SERVO CONTROL AND A PLAYBACK WITH A CAV SERVO CONTROL IN ACCORDANCE WITH THE REPRODUCTION SCANNING POSITION IN THE DISC RADIAL DIRECTION. IN PARTICULAR, A DIFFERENCE BETWEEN DISC ROTATION SPEEDS AT THE DISC INNERMOST AND OUTERMOST TRACKS IS MADE SMALLER THAN THAT IN A CASE WHERE A PLAYBACK IS PERFORMED AT A SPECIFIC LINEAR VELOCITY OVER THE DISC ENTIRE AREA. ACCORDING TO A FURTHER ASPECT OF THE INVENTION, REGIONS ARE SET BY DIVIDING THE DISC ENTIRE AREA IN THE DISC RADIAL DIRECTION. A JUDGMENT IS MADE OF A REGION TO WHICH A CURRENT REPRODUCTION SCANNING POSITION BELONGS, AND CONTROL IS MADE SO AS TO SWITCH THE PLAYBACK LINEAR VELOCITY IN ACCORDANCE WITH THE REGION THUS DETERMINED. IN PARTICULAR, A DIFFERENCE BETWEEN DISC ROTATION SPEEDS AT THE DISC INNERMOST AND OUTERMOST TRACKS IS MADE SMALLER THAN THAT IN A CASE WHERE THE LINEAR VELOCITY IS NOT CHANGED OVER THE DISC ENTIRE AREAFIGURE 4

    OPTICAL DISK DEVICE
    6.
    发明专利
    OPTICAL DISK DEVICE 失效

    公开(公告)号：JP2002008251A

    公开(公告)日：2002-01-11

    申请号：JP2000188799

    申请日：2000-06-23

    Applicant: SONY CORP

    Inventor： ISHIKAWA HIDEKI ,  MIKAMI TATSURO ,  SATO MASASHI

    IPC: G11B7/085 ,  G11B7/09

    Abstract: PROBLEM TO BE SOLVED: To provide an optical disk device where a highly precise and exact tracking retraction is enabled. SOLUTION: A DIR signal generating part 8 generates a discriminating signal for discriminating the driving direction of a tracking actuator 3 which moves an incident laser beam on an optical disk 1 in a direction traversing a track in a manner of raising time resolution for directional detection based on a polarity of a mate signal in respective rising and falling positions of a tracking zero cross signal Ftzc and a mirror signal Fm. Only the decelerating polarity part of the tracking actuator 3 of a tracking driving signal Ftf from a tracking phase compensating filter 10 is outputted as a brake signal Fb1 by a brake signal generating part 11 in accordance with the judging direction. Thus, the highly precise tracking retraction becomes possible in accordance with the driving direction of the tracking actuator 3 exactly, and the operation of the stable tracking retraction is exactly and quickly performed by an effective braking operation.

    OPTICAL DISK DEVICE AND TRACKING-CONTROLLING METHOD
    7.
    发明专利
    OPTICAL DISK DEVICE AND TRACKING-CONTROLLING METHOD 失效

    公开(公告)号：JP2002352454A

    公开(公告)日：2002-12-06

    申请号：JP2001158554

    申请日：2001-05-28

    Applicant: SONY CORP

    Inventor： ISHIKAWA HIDEKI

    IPC: G11B7/085 ,  G11B7/09 ,  G11B7/095

    Abstract: PROBLEM TO BE SOLVED: To surely generate a track-cross signal by applying the present invention concerning an optical disk device and a tracking-controlling method to, for example, an optical disk device for a DVD. SOLUTION: A side beam scans the position which is offset by nearly (1/4+n) P or (3/4+n) P to a main beam in the direction of the radius of the optical disk 22 and the track-cross signal TCS is generated by generating a difference signal from push-pull signals PPs1 and PPs2 of the returned light by the side beam. Thus, the results H and E of the receipt of the returned light of the side beam on the remote side are processed and subjected to subtraction to a push-pull signal PPm by the returned light of the main beam.

    Optical disc drive apparatus, optical pickup control method, and program
    8.
    发明专利
    Optical disc drive apparatus, optical pickup control method, and program 审中-公开
    光盘驱动装置，光学拾取控制方法和程序

    公开(公告)号：JP2011134364A

    公开(公告)日：2011-07-07

    申请号：JP2009290694

    申请日：2009-12-22

    Applicant: Sony Corp ,  ソニー株式会社

    Inventor： ISHIKAWA HIDEKI

    IPC: G11B7/14 ,  G11B7/085

    CPC classification number: G11B7/08517 ,  G11B7/08582

    Abstract: PROBLEM TO BE SOLVED: To provide an optical disc drive apparatus which can stably perform a seek operation at high speed, when two optical pickups are carried in one thread mechanism to perform writing simultaneously, reading simultaneously or writing and reading simultaneously, and to provide an optical pickup control method and a program.
    SOLUTION: There is provided the optical disc drive apparatus which includes first and second optical pickups for reproducing data recorded on an optical disc for recording data to the optical disc, a slide mechanism which carries the first and second optical pickups for making them slide in the radial direction of the optical disc, a first optical pickup control part which makes the first optical pickup perform search based on a seek command, a slide mechanism control part which controls the slide mechanism based on the seek command, and a second optical pickup control part which turns off a tracking servo of the second optical pickup when sliding by the slide mechanism.
    COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：为了提供一种能够以高速稳定地执行寻道操作的光盘驱动装置，当两个光学拾取器被携带在一个螺纹机构中以同时执行写入时，同时读取或同时读写，以及 以提供光学拾取器控制方法和程序。 解决方案：提供了一种光盘驱动装置，其包括第一和第二光学拾取器，用于再现记录在光盘上的用于将数据记录到光盘的数据;滑动机构，其承载第一和第二光学拾取器用于使其 沿光盘的径向滑动，使第一光学拾取器基于搜索命令进行搜索的第一光学拾取控制部分，基于搜索命令控制滑动机构的滑动机构控制部分和第二光学器件 拾取控制部件，其在通过滑动机构滑动时关闭第二光学拾取器的跟踪伺服。 版权所有（C）2011，JPO＆INPIT

    REPRODUCING DEVICE
    10.
    发明专利
    REPRODUCING DEVICE 失效

    公开(公告)号：JPH1031863A

    公开(公告)日：1998-02-03

    申请号：JP20550896

    申请日：1996-07-17

    Applicant: SONY CORP

    Inventor： ISHIKAWA HIDEKI ,  HACHIMORI TAKESHI

    IPC: G11B19/28 ,  G11B19/247

    Abstract: PROBLEM TO BE SOLVED: To shorten access time and to reduce power consumption by reducing a speed difference between the rotational speed when scanning the innermost periphery of a disk and that when scanning the outermost periphery than the speed difference when reproducing all areas at a specified linear velocity. SOLUTION: The reproduction is performed by switching a CLV servo to/ from a CAV servo according to a reproducing scan position in the radial direction of the disk 90. The table data for switching the linear velocity are stored in a memory 17, and the area is set by an address value, and spindle servo control operation in respective areas are set. Then, as for the change of a rotational speed in the radial direction of the disk, the speed difference between the rotational speed at the disk innermost periphery and the rotational speed at the disk outermost periphery is reduced than the speed difference in normal CLV reproduction.

Patent Agency Ranking