Color picture tubes

Details Color picture tubes Color picture tubes

1980-09-19

1983-09-06

La Roche, Eugene

Electric lamp and discharge devices

Cathode ray tube

Envelope

H01J 2988

Patent

active

044031700

ABSTRACT:
There is disclosed a color picture tube of the type having inner and outer conductive films respectively formed on inner and outer surfaces of a glass bulb of the color picture tube and a conduction path formed in the inner conductive film which extends from an anode terminal provided for the outer surface of the glass bulb to an electron gun for applying thereto anode high voltage. In this type of color picture tube, the resistance of the conduction path extending from the anode terminal to the electron gun is made smaller than an average resistance of a portion of the inner conductive film excepting the conduction path. With this arrangement, sufficient arcing energy can be obtained for removing causes for arcing when spot knocking involved in the manufacture process for the color picture tube is carried out and in addition, flash-over current accruing from arcing taking place during actual operation of a color television receiver set incorporating the color picture tube can be suppressed.

REFERENCES:
patent: 3792300 (1974-02-01), Benda et al.
patent: 4251749 (1981-02-01), Compen et al.
patent: 4272701 (1981-06-01), Gallaro et al.

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