Cathode ray tube having surface charge inhibiting means therein

Details Cathode ray tube having surface charge inhibiting means therein Cathode ray tube having surface charge inhibiting means therein

1974-07-17

1976-09-07

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Envelope

313450, H01J 2906, H01J 3100

Patent

active

039796329

ABSTRACT:
Means for deterring the build-up of a deleterious negative charge on the neck portion of a cathode ray tube is provided for utilization in especially those tubes wherein the electron gun structure is particularly close to the glass surface of the encompassing neck. The charge inhibiting means is formed of a circumferential band of insulative oxide material having a roughened topography to provide a discontinuous surface condition to break-up the deposition of metallic sublimation resultant from high temperature tube processing and conditioning. The band is oriented substantially in the rearward section of the neck on the portion thereof substantially encompassing the cathode region of the gun structure.

REFERENCES:
patent: 3355617 (1967-11-01), Schwartz
patent: 3536527 (1970-10-01), Javorik et al.
patent: 3758802 (1973-09-01), Kubo et al.

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