Method of manufacturing a cathode ray tube

Details Method of manufacturing a cathode ray tube Method of manufacturing a cathode ray tube

1991-04-03

1992-07-07

Rowan, Kurt

Electric lamp or space discharge component or device manufacturi

Process

Including use of electric arc or current for removing an...

445 6, 445 36, H01J 944, H01J 912

Patent

active

051278634

ABSTRACT:
A method of manufacturing a cathode ray tube which includes an electron gun (3) having a number of electrodes (7, 8) and a resistive-layer lends system (5), characterized in that the electron gun is sparked in a manufacturing step in which a pulse voltage is applied to an electrode (8) and a direct voltage is applied to a part (9) of the resistive-layer lens system adjacent to said electrode (8) through supply leads. During the sparking step measures are taken to prevent the occurrence of sparks in the resistive-layer lens system (5) per se, which in turn prevents damage to the resistive-layer lens system.

REFERENCES:
patent: 3966287 (1976-06-01), Liller
patent: 4326762 (1982-04-01), Hockenbrock et al.
patent: 4457731 (1984-07-01), Patrickson et al.
patent: 4945283 (1990-07-01), van Der Heijden et al.

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