Color display tube and method of manufacturing such a color disp

Details Color display tube and method of manufacturing such a color disp Color display tube and method of manufacturing such a color disp

1978-09-28

1980-02-12

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

29 2517, 313403, H01J 2907, H01J 3120, H01J 914

Patent

active

041885627

ABSTRACT:
A color display tube having a quadrupole post-focusing color selection electrode comprising a metal plate having a very large number of apertures, one side of the plate being covered with an insulating film on which a metal film is provided. The insulating film and metal film extend on two opposite portions of the wall of each aperture so that the plate and metal film form a pair of electrodes for producing an electron lens in the apertures.

REFERENCES:
patent: 3398309 (1968-08-01), Kaplan
patent: 3502942 (1970-03-01), Khan et al
patent: 4001620 (1977-01-01), Endriz
patent: 4059781 (1977-11-01), Van Alphen et al

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