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    SYSTEM FOR BEAM LANDING CORRECTION IN COLOR CATHODE RAY TUBE
    3.
    发明专利
    SYSTEM FOR BEAM LANDING CORRECTION IN COLOR CATHODE RAY TUBE 未知

    公开(公告)号：CA1038075A

    公开(公告)日：1978-09-05

    申请号：CA221813

    申请日：1975-03-11

    Applicant: SONY CORP

    Inventor： YAMADA MITSUYOSHI ,  HATADA HIDEO ,  IZUMISAWA MASATO ,  MACHIDA HIROMASA ,  FURUYAMA NORIHIDE

    IPC: H04N9/16

    Abstract: A system for compensating for mislanding of electron beams in a color cathode ray tube, which comprises a coil device provided on the color cathode ray tube in addition to a main deflection coil, a circuit for producing a plurality of currents having different wave forms, respectively, and a connecting device for connecting the coil device to selected one of connection points of the circuit so as to supply one or more of the currents produced in the circuit, which has a desired wave form, to said coil device selectively in response to the direction to which the color cathode ray tube faces, thereby to achieve sufficient compensation for mislanding of electron beams caused by the earth's magnetic field regardless of the directional situation of the cathode ray tube.

    LANDING CORRECTION METHOD AND DEVICE
    5.
    发明专利
    LANDING CORRECTION METHOD AND DEVICE 失效

    公开(公告)号：JPH0993596A

    公开(公告)日：1997-04-04

    申请号：JP24927295

    申请日：1995-09-27

    Applicant: SONY CORP

    Inventor： HATADA HIDEO ,  TANAKA YASUHIRO

    IPC: H01J29/76 ,  H04N9/29

    Abstract: PROBLEM TO BE SOLVED: To provide the inexpensive and simple landing correction method and device. SOLUTION: A landing correction coil 1 is placed to a funnel 11 of a cathode- ray tube 10. A deflection yoke 13 is provided to a neck 12 provided with an electron gun of the cathode-ray tube 10 and a rotation correction coil 2 is installed to the position causing less effect on landing in the vicinity. A rotation correction signal and a landing correction signal from a rotation correction terminal 5 and a landing correction terminal 6 are converted into a drive current by drive circuits 3, 4 respectively and the current is fed to the correction coils 1, 2. Then part of the rotation correction signal from the terminal 5 is fed to an adder 7 provided to a signal path from the terminal 6 at an optional rate. Furthermore, part of the landing correction signal from the terminal 6 is fed to a subtractor 8 provided to a signal path from the terminal 5 at an optional rate.

    6.
    发明专利
    失效

    公开(公告)号：JPH05244540A

    公开(公告)日：1993-09-21

    申请号：JP24276692

    申请日：1992-08-18

    Applicant: SONY CORP

    Inventor： SASAKI MASAHIKO ,  HATADA HIDEO ,  INOUE YOSHIAKI

    IPC: G09G1/00 ,  G09G1/04 ,  G09G1/16 ,  H01J29/00 ,  H04N3/18 ,  H04N5/64

    Abstract: PURPOSE:To reduce a leaked electric field produced on a front face of a cathode ray tube with simple configuration by supplying a leakage electric field correction signal to an electric field forming electrode. CONSTITUTION:A leakage electric field correction electrode 2 is formed to the inside of an outer frame 4 of a cathode ray tube 3 by providing a lead wire so as to surround a display area of the cathode ray tube 3 and fixed to the outer frame 4 via a prescribed support member. The cathode ray tube 3 is shielded by a shield plate from the vicinity of a bottle neck part to the vicinity of the outer frame thereby reducing spurious radiation to be a prescribed level or below. A deflection circuit 6 generates a drive power supply for the cathode ray tube 3 and drives the cathode ray tube 3 to form a display picture. Furthermore, a pickup section 10 picks up a drive signal for the horizontal deflection yoke 8 thereby supplying the drive signal to the leakage electric field correction electrode 2 to cancel a leakage electric field. Thus, the leakage electric field of the monitor is reduced with simple configuration.

    DISPLAY DEVICE
    7.
    发明专利
    DISPLAY DEVICE 失效

    公开(公告)号：JPH04308633A

    公开(公告)日：1992-10-30

    申请号：JP9956891

    申请日：1991-04-04

    Applicant: SONY CORP

    Inventor： INOUE YOSHIAKI ,  HATADA HIDEO

    IPC: H01J29/76

    Abstract: PURPOSE:To reduce a leak magnetic field which is harmful to man's body in a simple constitution. CONSTITUTION:A loop of a cancellation coil 5 (5a, 5b) is formed using a lead 2 connecting a horizontal deflection coil 7 with a horizontal deflection circuit 3 of a deflection yoke 1, and the cancellation coil 5 (5a, 5b) is fixed at a circumferential surface of the deflection yoke 1.

    CATHODE RAY TUBE UNIT
    9.
    发明专利
    CATHODE RAY TUBE UNIT 失效

    公开(公告)号：JPH10243411A

    公开(公告)日：1998-09-11

    申请号：JP4579797

    申请日：1997-02-28

    Applicant: SONY CORP

    Inventor： INOUE YOSHIAKI ,  HATADA HIDEO

    IPC: H01J29/54 ,  G09G1/04 ,  G09G5/00 ,  H04N3/23 ,  H04N3/26 ,  H04N5/68 ,  H04N9/28

    Abstract: PROBLEM TO BE SOLVED: To provide a cathode ray tube excellent in color purity by driving correction coils arranged around the cathode ray tube so as to generate an external correction magnetic field to correct beam landing drift and using the generated magnetic field to correct the beam landing drift. SOLUTION: A correction coil 2 is placed respectively to four corners, upper right, upper left, lower right and lower left corners of a funnel in the vicinity of a tube screen of the cathode ray tube 1. The cathode ray tube unit is provided with a beam current detection circuit to calculate an electron beam amount, a timer circuit to measure an elapsed time of the cathode ray tube after application of power thereto, and a landing drift correction signal generating circuit. A beam current is monitored to obtain a state of drift of beam landing onto a fluorescent screen resulting from thermal expansion of color selection electrodes and an elapsed time of the cathode ray tube after application of power thereto is checked and obtained by a timer output voltage, the landing drift is calculated and a correction signal is generated to drive the landing correction coils so as to attain landing drift correction with high accuracy.

    DYNAMIC FOCUS CIRCUIT
    10.
    发明专利
    DYNAMIC FOCUS CIRCUIT 失效

    公开(公告)号：JPH0758976A

    公开(公告)日：1995-03-03

    申请号：JP20235493

    申请日：1993-08-16

    Applicant: SONY CORP

    Inventor： SASAKI MASAHIKO ,  HATADA HIDEO

    IPC: H04N3/26

    Abstract: PURPOSE:To highly precisely correct a dynamic focus with a simple circuit. CONSTITUTION:In a dynamic focus circuit provided with a dynamic focus transformer 20 supplying the pulse of a horizontal period to a primary-side so as to obtain a signal boosted to a secondary side and a capacitor 3 which is connected to the secondary side of a dynamic focus transformer 30 and converts the signal into the parabolic wave of the horizontal period, an orthogonal saturable reactance transformer 20 is connected to the primary-side of the dynamic focus transformer 30 in series, a control signal based on the parabolic wave of a vertical period is supplied to the control coil of the orthogonal saturable reactance transformer 20, and the parabolic wave of the horizontal period is modulated by the peak value of the parabolic wave of the vertical period.

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