Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1993-04-19
1995-03-07
Issing, Gregory C.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315383, 315370, G09G 104, H01J 2952, H01J 2956
Patent
active
053961579
ABSTRACT:
Large format TV tubes must produce a high peak brightness in order to be acceptable to the user. This results in a large beam current in bright areas of the picture and in a subsequent defocusing of the resulting spot on the display and in a loss of the sharpness of vertical and horizontal transitions. The apparent sharpness of a vertical transition is gained by modifying the deflection of the TV receiver such that, at vertical transitions, the line on the bright side of the transition is deflected away from the transition region. Advantageously, the amount of vertical scan modulation corresponds to a multi-level control signal and depends on the grey levels of the transition.
REFERENCES:
patent: 2881354 (1959-04-01), Keizer
patent: 2902540 (1959-09-01), Sarson
patent: 2905855 (1959-09-01), Atti
patent: 3530237 (1970-09-01), Redington
patent: 4667135 (1987-05-01), Bristol
patent: 4888529 (1989-12-01), Madsen et al.
Boie Werner
Bolender Nadine
Hackett Andrew D.
Henig Sammy S.
Issing Gregory C.
Laks Joseph J.
Thomson Consumer Electronics S.A.
Tripoli Joseph S.
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