Cathode-ray tube having inline electron gun comprising...

Details Cathode-ray tube having inline electron gun comprising... Cathode-ray tube having inline electron gun comprising...

H - Electricity

01

J

313/35.14, 313/3

H01J 29/50 (2006.01) H01J 29/56 (2006.01)

Patent

CA 1278813

ABSTRACT OF THE DISCLOSURE A high resolution color display tube has an electron gun comprising 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.

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