Display arrangements

Details Display arrangements Display arrangements

1979-10-03

1981-12-15

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313410, G06K 1520, H01J 3116

Patent

active

043061788

ABSTRACT:
A display arrangement consists of a cathode ray tube in which electrons from a flood gun pass through a segmented mesh electrode, different portions of which can be selectively switched to enable the electrons to reach only selected portions of a fluorescent screen. As very low switching voltages are applied to the mesh electrode to control the passage of electrons from the flood gun, the cathode is heated to the temperature at which electrons are emitted by the application of relatively short high current pulses. Electrons are allowed to pass through the mesh electrode only during the intervals between these pulses.

REFERENCES:
patent: 3651361 (1972-03-01), Tanaka et al.
patent: 4167690 (1979-09-01), Gange

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