Apparatus for suppressing electric field radiation from a cathod

Details Apparatus for suppressing electric field radiation from a cathod Apparatus for suppressing electric field radiation from a cathod

1998-05-27

2000-04-11

Wong, Don

Electric lamp and discharge devices: systems

With electromagnetic wave radiation preventing or shielding...

315 8, 315 85, 315370, 313313, H01J 152, B01J 052

Patent

active

060491736

ABSTRACT:
An anode ripple voltage waveform is detected by a capacitor built into a flyback transformer. The detected waveform is then phased by a phasing circuit, amplitude adjusted by an amplitude adjusting circuit and subsequently delivered to an addition circuit. A horizontal component is detected by a horizontal output transformer, then phase adjusted by a phasing circuit and subsequently amplitude adjusted by an amplitude adjusting circuit. Thereafter, the horizontal component is added to the anode ripple component by the addition circuit, inverted and amplified by an inverting amplifier, and then supplied to an antenna arranged in proximity to the cathode ray tube. Thus, electric fields radiated from the face of the cathode ray tube are suppressed.

REFERENCES:
patent: 5151635 (1992-09-01), Cappels
patent: 5260626 (1993-11-01), Takase et al.
patent: 5404084 (1995-04-01), Onodera et al.
patent: 5789872 (1998-08-01), Kohga et al.

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