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    1.
    发明专利
    未知

    公开(公告)号：DE60230115D1

    公开(公告)日：2009-01-15

    申请号：DE60230115

    申请日：2002-02-08

    Applicant: SONY CORP

    Inventor： TANAKA TOMIJI ,  NAKAO SHINICHI ,  ENDOH SOHMEI ,  ISHII TAMOTSU

    IPC: G11B7/085 ,  G11B7/24 ,  G11B7/007 ,  G11B7/09 ,  G11B7/095 ,  G11B11/105

    Abstract: A device and a method can judge the radial moving direction of light spots formed on the signal recording surface of an optical disc having grooves of two types that are different from each other in terms of depth and arranged along a recording track that is a land of the optical disc. The judging section of the device judges the moving direction of the main spot on the basis of binarized data of a difference signal of the main spot and binarized data of a difference signal of one of the side spots. With this arrangement, the moving direction of the light spots relative to a radial direction of the optical disc can be determined only by using difference signals without using any sum signal.

    Device and method for recording and reproducing disk and disk recording reproducing device
    6.
    发明专利
    Device and method for recording and reproducing disk and disk recording reproducing device 审中-公开

    公开(公告)号：JP2004039111A

    公开(公告)日：2004-02-05

    申请号：JP2002195021

    申请日：2002-07-03

    Applicant: Sony Corp ,  ソニー株式会社

    Inventor： ARIKAWA YOSHIROU ,  MOROTOMI SHIRO ,  NAKAO SHINICHI ,  HOSAKA YASUO

    IPC: G11B19/00 ,  G11B7/085 ,  G11B7/09 ,  G11B11/105 ,  G11B19/28 ,  G11B21/08

    Abstract: PROBLEM TO BE SOLVED: To provide a disk recording device which can be made silent in accordance with a plurality of different purposes of requested capacity such as storage for a video camera and PC. SOLUTION: A system controller 41 switches a control mode on a device part 110 through a servo control part 37 and/or a driving part 42 based on three operation modes which can be changed and controls the operation sound of the device part 110. The controller is provided with a focus on/off function 121, a spindle control function 122 formed of spindle motor rotational speed control and spindle brake on/off control, a thread control function 123 formed of thread motor rotational speed control and thread brake on/off control and a spindle motor/thread motor driving voltage control function 124 controlling a driving voltage of spindle motor/thread motor through a power supply circuit 120. COPYRIGHT: (C)2004,JPO

    TRACKING CONTROLLER, TRACKING CONTROL METHOD, AND OPTICAL DISK RECORDER/PLAYER
    7.
    发明专利
    TRACKING CONTROLLER, TRACKING CONTROL METHOD, AND OPTICAL DISK RECORDER/PLAYER 失效

    公开(公告)号：JP2002230806A

    公开(公告)日：2002-08-16

    申请号：JP2001028799

    申请日：2001-02-05

    Applicant: SONY CORP

    Inventor： TANAKA FUJI ,  ENDO SOMEI ,  HATTORI MASATO ,  NAKAO SHINICHI ,  ISHII TAMOTSU

    IPC: G11B7/24 ,  G11B7/004 ,  G11B7/007 ,  G11B7/09

    Abstract: PROBLEM TO BE SOLVED: To provide a tracking controller which can control the tracking of a light spot on an optical disk in which two kinds of grooves having a different depth along a land is arranged adjacently with each other and in the shape of a spiral. SOLUTION: A tracking error signal generating part 34 generates a tracking error signal TE from a detection signal detected in the photodetecting areas Ma and Mb of a first photodetector 31, a detection signal detected in the photodetecting areas S1a and S1b of a second photodetector 32, and a detection signal detected in the photodetecting areas S2a and S2b of a third photodetector 33. A tracking control part 35 controls the tracking of a laser spot irradiated from an optical pickup device to a magneto optical disk 1 by using the tracking error signal TE generated by the tracking error signal generating part 34.

    OPTICAL DISK DEVICE
    8.
    发明专利
    OPTICAL DISK DEVICE 失效

    公开(公告)号：JPH11203686A

    公开(公告)日：1999-07-30

    申请号：JP674698

    申请日：1998-01-16

    Applicant: SONY CORP

    Inventor： NAKAO SHINICHI

    IPC: G11B7/085

    Abstract: PROBLEM TO BE SOLVED: To provide an optical disk device capable of easily detecting a seek direction even with such a type of an optical disk as a traverse signal is not superimposed on returning light. SOLUTION: This device comprises a driving means 12 for driving an optical disk 11 of a land group system having clock marks on a signal recording surface, an optical pickup 14 for detecting light returning from the signal recording surface of the optical disk by a photo-detector, and a signal processing circuit 23 for generating a reproducing signal based on the detection signal from the photo-detector. Here, the photo-detector has a four-split light receiving part and the optical disk device has a judging part 40 for detecting a seek direction of the optical pickup from the radial push-pull signal and tangential push-pull signal by the detection signal from the light receiving part of the photo-detector.

    DISK UNIT
    9.
    发明专利
    DISK UNIT 失效

    公开(公告)号：JPH11134806A

    公开(公告)日：1999-05-21

    申请号：JP29895597

    申请日：1997-10-30

    Applicant: SONY CORP

    Inventor： NAKAO SHINICHI

    IPC: G11B20/10

    Abstract: PROBLEM TO BE SOLVED: To prevent release of PLL lock even in the state where tracking servo is released, by generating positive and negative threshold values from the amplitude value of a clock mark signal which changes at every moment, and using a gate signal corresponding to the sign obtained by comparing the clock mark signal with the threshold values, as a gate signal for generating a phase comparison signal. SOLUTION: Clock information is taken out, using a clock mark signal included in a signal (TPP signal) obtained by detecting clock mark formed on a signal recording surface of an optical disk by a push-pull mode in a tangential direction to the disk. To realize this, (Ea-Eb)/2 as a positive threshold value and -(Ea-Eb)/2 as a negative threshold value are found from a positive envelope Ea and a negative envelope Eb of the TPP signal. The threshold values and a sine wave part of the TPP signal are compared with each other, and whether signals come out in the order of a detection pulse signal A, an edge pulse signal and a detection pulse signal B or in the reverse order is detected. Thus, a PLL gate signal is produced.

    OPTICAL DISK DEVICE AND OPTICAL DISK REPRODUCING METHOD
    10.
    发明专利
    OPTICAL DISK DEVICE AND OPTICAL DISK REPRODUCING METHOD 失效

    公开(公告)号：JPH10144002A

    公开(公告)日：1998-05-29

    申请号：JP30206896

    申请日：1996-11-13

    Applicant: SONY CORP

    Inventor： NAKAO SHINICHI

    IPC: G11B20/10 ,  G11B7/00 ,  G11B7/005 ,  G11B7/007

    Abstract: PROBLEM TO BE SOLVED: To satisfactorily remove the fluctuation of DC components superposed on a reproduced signal and to make the followup ability of a gain with respect to the fluctuation of input signals satisfactory and also to dispense with amplifiers capable of corresponding to the input signal of wide band. SOLUTION: In this optical disk device, the fluctuation of amplitudes of a reproduced signal and the fluctuation of DC components to be superposed on the reproduced signal are removed by performing the envelope detection of the reproduced signal by a peak hold circuit 32 and a bottom hold circuit 34 and by performing signal processings of an A/D conversion or the like while making the detected envelops value a reference voltage. On this occasion, this device copes with a fact that data clocks are different in zones by changing over the time constant of a means 15 performing the envelope detection in association with a zone from which the reproduced signal is obtained on the optical disk medium of a zone CAV system by a time constant changeover circuit 35. Moreover, the envelope value is always made proper with respect to the reproduced signal from a data area by interrupting an operation detecting an envelope in the part obtained from the non-data area of the optical disk medium in reproduced signals and by holding the envelope value before the interruption.

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