Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1987-04-15
1988-04-05
Moore, David K.
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
313449, H01J 2950, H01J 2956
Patent
active
047361336
ABSTRACT:
An electron gun for a high resolution color display tube comprises three inline cathode assemblies, a control grid with three inline apertures, a screen grid with three inline apertures, a screen grid slot plate with three inline substantially rectangular slots each associated with a different one of the apertures in the screen grid, and a main electron lens. The screen grid slot plate is attached to the screen grid on the side thereof facing the main electron lens. Each of the cathode assemblies produces an electron beam having a given beam current. Each of the slots in the screen grid slot plate has an inline dimension and a transverse dimension which are selected for the given beam current to independently control the horizontal and vertical sizes of the spot produced by each of the electron beams at a distance from the electron gun.
REFERENCES:
patent: 4234814 (1980-11-01), Chen et al.
patent: 4319163 (1982-03-01), Chen
patent: 4473775 (1984-09-01), Hosokoshi et al.
patent: 4514659 (1985-04-01), Chen
patent: 4523123 (1985-06-01), Chen
Barbin Robert L.
Chen Hsing-Yao
Maninger Loren L.
Coughlin Jr. Vincent J.
Irlbeck Dennis H.
Moore David K.
O'Shea Sandra L.
RCA Corporation
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