System for modulating a flat panel image display device

Details System for modulating a flat panel image display device System for modulating a flat panel image display device

1977-02-17

1978-02-28

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

3159TV, 315 30, 315383, 340324M, 358 64, H04N 568

Patent

active

040770540

ABSTRACT:
Electron beams in a cathodoluminescent display device are modulated utilizing a means for generating a voltage proportional to the instantaneous electrical charge on the cathodoluminescent screen and means for generating a periodic reference waveform having a peak voltage proportional to a sampling of the incoming video signal. A differential amplifier compares the voltage proportional to the electrical charge on the screen to the instantaneous voltage of the reference waveform. A regulator controls the flow of electrons to the screen so as to force the voltage which is proportional to the instantaneous screen charge to approximate the reference waveform voltage.

REFERENCES:
patent: 3541254 (1970-11-01), Orthuber

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