Apparatus for suppressing field radiation from display device

Electric lamp and discharge devices: systems – With electromagnetic wave radiation preventing or shielding...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H01J 152, H01J 502

Patent

active

052606260

ABSTRACT:
In order to eliminate any harmful influence due to electric field radiation on the human body, electric field radiation from a front surface of a cathode ray tube is reduced. A degaussing coil arranged in proximity to a peripheral edge of a front surface of a cathode ray tube is employed advantageously. The degaussing coil is supplied with a voltage which is opposite in polarity to an electric field radiated from the front surface of the cathode ray tube. The reverse polarity voltage is derived from an output signal obtained from an output signal of a horizontal deflection circuit by a flyback transformer and/or derived from a voltage obtained by phase-inverting an anode voltage fluctuating in vertical synchronization. After a degaussing operation is completed, relay contacts are opened on the basis of a timer-controlled relay switch, thereby completely cutting the connection between the degaussing coil and a degaussing power source generating an alternating current which is supplied to the degaussing coil for the degaussing operation.

REFERENCES:
patent: 4922153 (1990-05-01), Kevius
patent: 4996461 (1991-02-01), Bentley
patent: 5101139 (1992-03-01), Lechter
patent: 5107179 (1992-04-01), Vidovich
patent: 5151635 (1992-09-01), Cappels

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for suppressing field radiation from display device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for suppressing field radiation from display device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for suppressing field radiation from display device will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1145507

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.