Electric lamp and discharge devices: systems – With electromagnetic wave radiation preventing or shielding...
Patent
1997-07-29
1998-11-24
Wong, Don
Electric lamp and discharge devices: systems
With electromagnetic wave radiation preventing or shielding...
315 8, 313402, 313479, H01J 152
Patent
active
058412344
ABSTRACT:
A device for shielding an electrical field emitted backward from a video display appliance. The device includes a device for shielding an electrical field emitted backward from a video display appliance including a CRT having an anode to which a high voltage is supplied, a deflection yoke for deflecting electron beams produced from electron guns, and a video board for processing and outputting video signals to the CRT, the device comprising, a first patterned section printed on a periphery of a back of the video board and connected to ground, and a second patterned section printed inside the first patterned section, the scond patterned section having a pulse applying portion to which a pulse voltage having a polarity opposite to the electric field waveform is applied and a termination portion.
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LG Electronics Inc.
Philogene Haissa
Wong Don
LandOfFree
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