Electric lamp and discharge devices – Cathode ray tube – Beam deflecting means
Patent
1997-11-14
2000-04-25
Patel, Nimeshkumar D.
Electric lamp and discharge devices
Cathode ray tube
Beam deflecting means
313432, 313439, H01J 124, H01J 1918
Patent
active
060548045
ABSTRACT:
A cathode ray tube apparatus that can reduce the leakage extraneous electric field with low cost. The cathode ray tube apparatus comprises a front panel, a glass bulb having a funnel part including an anode terminal at the outer surface thereof and a neck part including an electron gun, a deflection apparatus comprising a horizontal deflection coil on the outer surface of the funnel part and the neck part of the glass bulb, a flyback transformer connected to the anode terminal of the funnel part via a first lead wire having an insulating coating, and a leakage extraneous electric field controller installed on the first lead wire. The controller reduces the leakage of the extraneous electric field from the first lead wire. It is preferable that the leakage extraneous electric field controller comprises a negative pulse generator generating negative pulses having a reverse polarity and a synchronized period with respect to the horizontal deflection voltage signal of the horizontal deflection coil, a conductor at least partially surrounding the insulation coated first lead wire, and a second lead wire connecting the negative pulse generator and the conductor.
REFERENCES:
patent: 5404084 (1995-04-01), Onodera et al.
patent: 5449975 (1995-09-01), Madsen
patent: 5789872 (1998-08-01), Kohga et al.
Arimoto Nozomu
Oshima Yoshifumi
Suzuki Atsushi
Matsushita Electronics Corporation
Patel Nimeshkumar D.
Smith Michael J.
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