Double grid electron gun system and method of use

Details Double grid electron gun system and method of use Double grid electron gun system and method of use

1974-05-28

1976-01-20

Tubbesing, T. H.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Ray modulation

315383, H01J 2952

Patent

active

039341712

ABSTRACT:
An electron gun for use in a cathode-ray tube is provided with two control grids between the cathode and an accelerating electrode. The control grids are both provided with separate control voltages bearing the same intensity-modulation information for control of the electron beam from the cathode. The two control voltages are caused to vary, one according to a linear function of the variation of the other. When this linear function is caused to have a particular slope, the area of the cathode which emits the electron beam remains approximately constant over a wide range of control voltage.

REFERENCES:
patent: 3403291 (1968-09-01), Lazarchick, Jr. et al.
patent: 3417199 (1968-12-01), Yoshida et al.

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