Flat cathode ray tube

Details Flat cathode ray tube Flat cathode ray tube

1981-02-11

1982-07-13

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313422, H01J 2970, H01J 2972

Patent

active

043396941

ABSTRACT:
A flat cathode ray tube is disclosed in which the deflection of an electron beam in the direction which requires a large deflection angle is carried out by the electromagnetic deflection, while the deflection of the electron beam in the direction which requires a small deflection angle is carried out by electrostatic deflection. Further, in the evacuated envelope of the flat cathode ray tube, there is located a high magnetic permeability body to concentrate the magnetic flux on the electron beam necessary for the electromagnetic deflection. In a certain case, a magnetic material body with the electrical conductivity is used as the high magnetic permeability body so as to provide it with the function of serving as an electrode plate for the electrostatic deflection of the electron beam.

REFERENCES:
patent: 3226587 (1965-12-01), Chin
patent: 3379912 (1968-04-01), Shanafelt
patent: 3395312 (1968-07-01), Freestone et al.

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