Color CRT with composite arc suppression structure

Details Color CRT with composite arc suppression structure Color CRT with composite arc suppression structure

1984-06-28

1986-07-22

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Envelope

445 45, 313477HC, H01J 2988, H01J 2992

Patent

active

046021876

ABSTRACT:
A color cathode ray tube having feedback features including a phosphor pattern on the mask and a window in the tube wall to allow external detection of the phosphor emissions, also incorporates arc limiting features including a high resistance coating in the neck region of the tube and a lower resistance coating underneath the arc limiting coating in the region of electrical contact between the arc limiting coating and the electron gun. The composite coating is effective to reduce erosion of the arc limiting coating in the area of snubber contact during high voltage conditioning of the tube. Such a tube is useful, for example, for high resolution color displays having an automatic convergence feature.

REFERENCES:
patent: 3802757 (1974-04-01), Benda et al.
patent: 3959686 (1976-05-01), Davis et al.
patent: 4018717 (1977-04-01), Francel et al.
patent: 4124540 (1978-11-01), Foreman et al.
patent: 4229675 (1980-10-01), Matsuki et al.
patent: 4528477 (1985-07-01), Gallaro

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