Color display tube with control grid positioning feature

Details Color display tube with control grid positioning feature Color display tube with control grid positioning feature

1980-04-28

1982-06-29

Lieberman, Eli

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, H01J 2902

Patent

active

043374093

ABSTRACT:
A color display tube includes in an evacuated envelope, an electron gun system for producing three electron beams directed onto a display window. For each electron beam the electron gun system is provided with a cathode which is secured in a cup-shaped control grid having an aperture. The control grids are secured to a cup-shaped anode by means of a plate of electrically insulating material. The electron gun system may be constructed with a focusing electrode which is common for the three electron beams and a common accelerating electrode. A sleeve-shaped electrode may be secured to the anode and the focusing electrode is secured thereto by means of a ring of electrically insulating material.

REFERENCES:
patent: 3295001 (1966-12-01), Burdick et al.
patent: 3732450 (1973-05-01), Mayers
patent: 3906279 (1975-09-01), Linssen
patent: 4063128 (1977-12-01), Hughes
patent: 4086513 (1978-04-01), Evans

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