Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1992-03-09
1992-12-22
Issing, Gregory C.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
31536821, G09G 128, H01J 2951
Patent
active
051736446
ABSTRACT:
A convergence correction apparatus comprising a core for producing a bias magnetic field. The core has first, second, third and fourth coils provided thereon. The first and second coils are wound to produce a magnetic field in a direction opposite to the direction of the bias magnetic field. The third and fourth coils are wound to produce a magnetic field in the same direction as the direction of the bias magnetic field. The first and fourth coils are connected to form a first series circuit connected in parallel with a second series circuit of the third and second coils. A first terminal is connected to a junction between the first and third coils. A second terminal is connected to a junction between the second and fourth coils. A convergence correction coil is connected at one end thereof to a junction between the first and fourth coils and at the other end thereof to a junction between the second and third coils. A horizontal deflection current is applied between the first and second terminals. The bias magnetic field is produced by a bias coil provided on the core and supplied with a vertical synchronization current having a parabolic waveform. Alternatively, the basic magnetic field is produced by a combination of at least one permanent magnet provided on the core and a bias coil provided on the core and supplied with a vertical synchronization current having a parabolic waveform.
REFERENCES:
patent: 3894276 (1975-07-01), Matsumoto et al.
Aoki Kyousuke
Endo Kazuhiko
Maekawa Shuichirou
Nakamura Yukio
Eslinger Lewis H.
Issing Gregory C.
Maioli Jay H.
Sony Corporation
LandOfFree
Convergence correction apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Convergence correction apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Convergence correction apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-976545