Electrostatic and dynamic magnetic control of cathode ray for di

Electric lamp and discharge devices – Cathode ray tube – Ray generating or control

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Details

313449, 313412, 313413, 313458, H01J 2956, H01J 2951, H01J 3120

Patent

active

039462668

ABSTRACT:
A cathode ray tube is disclosed in which an electron beam is deflected to scan a phosphor screen for producing a picture thereon, and which has an electrostatic beam control device for deforming the cross section of the beam so as to compensate for the distortion in shape of the beam landing spot on the screen at its peripheral portion caused by the beam deflection and a magnetic beam control device for deforming the cross-section of the beam dynamically in response to the beam deflection so as to compensate for the distortion in shape of the beam landing spot on the screen at its central portion caused by the electrostatic beam control device.

REFERENCES:
patent: 3325675 (1967-06-01), Sanford
patent: 3678316 (1972-07-01), Barten
patent: 3800176 (1974-03-01), Gross et al.
patent: 3866081 (1975-02-01), Hasker et al.

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