Electric lamp and discharge devices: systems – Cathode ray tube circuits – Pulse storing
Patent
1988-04-28
1989-08-15
Yusko, Donald J.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Pulse storing
315370, 315371, 315 85, 313440, H01F 1300, H01J 3120
Patent
active
048578053
ABSTRACT:
Picture display device having a display tube and a deflection unit (9) comprising a field deflection coil and a line deflection coil (11). In order to comply with a predetermined interference radiation standard, the picture display device is provided with a compensation coil system having a first set of compensation coils (18, 19) for generating a dipole compensation field and possibly a second set of compensation coils (18a, 19a) for generating a fourpole compensation field, the compensation coil system being preferably arranged in series with the line deflection coil 11 ) and being provided with electric means (R; R.sub.1 ; R.sub.2 ; R.sub.3 ; R.sub.4) to shift the phase of the current through at least a part of the compensation coil system with respect to the phase of the current through the line deflection coil.
REFERENCES:
patent: 2994803 (1961-08-01), Goldberg
patent: 3879633 (1975-04-01), Stark, Jr.
patent: 4634930 (1987-01-01), Toshiyasu et al.
patent: 4700114 (1987-10-01), Southerland, II
Bosch Gerrit
Doomernik Fransiscus M. P. P.
Pasma Tjebbe R.
Sluyterman Albertus A. S.
Wielink Steven M.
Palladino Brian S.
U.S. Philips Corporation
Yusko Donald J.
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