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    • 8. 发明专利
    • DEFLECTION YOKE
    • JP2001052631A
    • 2001-02-23
    • JP22823499
    • 1999-08-12
    • HITACHI LTDHITACHI MEDIA ELECTRON KK
    • KOMATSU TAKANORIYOSHIOKA HIROSHIOKUYAMA NORITAKASAKURAI SOICHIOBARA YOSHIHIRO
    • H01J29/76H04N9/28
    • PROBLEM TO BE SOLVED: To correct the convergence drifted in accompany with the temperature rise of a deflection yoke by mounting a temperature variable resisting means in parallel with a variable resisting means of a correcting circuit mounted on a terminal board. SOLUTION: When an operating temperature of a deflection yoke rises, a resistance value of a temperature variable resisting means 5 having a negative rate of change to the temperature change is reduced, and the electric current flowing in the temperature variable resisting means 5 is increased. Here, the combined resistance of the temperature variable resisting means 5 and an adjustment volume 3 is reduced. As a result, when an upper half of an image plane is deflected, the electric current flowing in a diode D5 is increased, and the electric current flowing in a coil 44 is increased in comparison with the electric current flowing in a coil 43, whereby the misconvergence can be corrected. In a case when a lower half of the image plane is deflected, the electric current flowing in the diode D4 is increased, and the relationship between the electric current flowing in the coil 44 and that in the coil 43 is reversed to that in the deflection of the upper half of the image plane.
    • 9. 发明专利
    • CATHODE-RAY TUBE DEVICE
    • JPH10241608A
    • 1998-09-11
    • JP4186497
    • 1997-02-26
    • HITACHI LTD
    • HISADA TAKAKISAKURAI SOICHIYOSHIOKA HIROSHI
    • H01J29/88H01J29/02H01J31/20
    • PROBLEM TO BE SOLVED: To provide a cathode-ray tube which is high in productivity with a long service life by applying magnetic power with a specified value or more of a specific magnetic permeability onto an internal conductive film provided on the funnel inner surface conductive to a fluorescent screen and a shadow mask, so as to easily shield the external magnetic field and to dispense with a shielding plate which is inferior in assembling workability and having a possibility of gas discharge. SOLUTION: A fluorescent screen 3 is provided t the inner surface of a panel screen part 1a of a cathode-ray tube body 1, and a shadow mask 4 is arranged on the inside through a frame 5. The inner surface of a funnel part 1c is provided with a conductive magnetic power layer 7, formed by applying magnetic powder with a specific magnetic permeability of 100 or more onto an internal conductive film, so as to shield the external magnetic field and to mask conductive a high pressure lead-in part 6, the fluorescent screen 3 and the shadow mask 4. A deflection coil 9 is arranged on the outside, and an electron beam 8 from an electron gun 2, arranged inside a neck part 1d, is deflected to make the fluorescent screen 3 emit light. If necessary, the magnetic powder is also applied to an external conductive coat 13 to improve the magnetic shielding performance.
    • 10. 发明专利
    • COLOR CATHODE-RAY TUBE
    • JPH10144236A
    • 1998-05-29
    • JP30271496
    • 1996-11-14
    • HITACHI LTD
    • SUZUKI KENJIYOSHIOKA HIROSHI
    • H01J31/20H01J29/54H01J29/68
    • PROBLEM TO BE SOLVED: To facilitate the adjustment of convergence by separately providing a magnet plate for four-pole from each magnet plate in the coaxial condition with each magnet plate. SOLUTION: A pair of magnet plates 12X for four-pole, which are provided in a holder 11 of a convergence adjusting means, are arranged in the coaxial condition between a pair of magnet plates 12A for double-pole and a pair of magnet plates 12B for four-pole through a spacer 13. This magnet plate 12X can be separately operated, and rotated around a neck part so as to separate an electron beam for R (red) and an electron beam for B (blue) in relation to an electron beam for G (green) interposed between both the electron beams. As a result, light emission is visually recognized as one point emission, but each phosphor layer, which is emitting light, can be separately recognized. Consequently, at the time of observing a display surface and while adjusting the convergence, degree of freedom is given to the adjustment width, and convergence can be accurately adjusted.