Convergence system

Details Convergence system Convergence system

1991-02-12

1992-12-15

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

31536827, 31536828, 335213, H01J 2951, G09G 128

Patent

active

051720353

ABSTRACT:
A system for generating magnetic fields to converge a plurality of electron beams in a cathode-ray tube including at least one convergence yoke having a core with a ring-shaped outer periphery and a plurality of magnetic poles on an inner periphery thereof extending toward a neck part of the cathode-ray tube for forming magnetic paths therewith. A lateral line comma aberration correcting coil arrangement is provided with at least a first coil wound on at least one of the plurality of magnetic poles of the at least one convergence yoke and a first driving circuit connected to the first coil for enabling generation of a magnetic field to correct misconvergence in a lateral line direction on a fluorescent face of the cathode-ray tube, and a longitudinal line correction coil arrangement is provided with at least a second coil wound on the at least one of the plurality of magnetic poles of the at least one convergence yoke and a second driving circuit connected to the at least second coil for enabling generation of a magnetic field to correct misconvergence in a longitudinal line direction on the fluorescent face of the cathode-ray tube.

REFERENCES:
patent: 3325675 (1967-06-01), Sanford
patent: 4027219 (1977-05-01), Van Alpen et al.
patent: 4725763 (1988-02-01), Okuyama et al.

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