Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1994-03-01
1995-08-15
Issing, Gregory C.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315395, G09G 104, H01J 2970
Patent
active
054422620
ABSTRACT:
When, for example, horizontal lines are displayed on a display screen of a display device, they may exhibit a field distortion, predominantly in the form of gullwing distortion which becomes manifest as a sinewave-shaped line instead of the horizontal line to be displayed. To correct this field distortion, a correction is generated by a field distortion correction circuit and a resonant circuit, dependent on the location on the display screen, which correction is added to the field deflection current so that the picture to be displayed is corrected for this error.
REFERENCES:
patent: 3676733 (1972-07-01), Eulenberg et al.
patent: 3949269 (1976-04-01), Wheeler
patent: 4041354 (1977-08-01), Haferl
patent: 4118656 (1978-10-01), Dietz
Goodman Edward W.
Issing Gregory C.
U.S. Philips Corporation
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