Protection device for the horizontal scanning control of a displ

Details Protection device for the horizontal scanning control of a displ Protection device for the horizontal scanning control of a displ

1983-03-22

1984-11-20

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358190, H01J 2970, H01J 2976

Patent

active

044841124

ABSTRACT:
The invention relates to a display screen horizontal scanning control protection device. The device comprises a switch making it possible to open or close the supply circuit of the scanning control circuit, said switch being activated with the aid of a signal supplied by an AND gate, whose state is a function of the level of the supply voltage of the central unit, which itself generates the horizontal scanning sync signal activating the scanning control circuit.
Application to telematic terminals equipped with a cathode-ray tube screen.

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