Synchronous raster scan apparatus for display device

Details Synchronous raster scan apparatus for display device Synchronous raster scan apparatus for display device

1977-02-28

1980-04-01

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340814, 358150, G06F 314

Patent

active

041964314

ABSTRACT:
A display device includes improved raster scan apparatus which provides for the video display of information in timed synchronization with cycles of AC power. The raster scan apparatus includes a circuit which monitors the periodicity of the AC input power to the display device. This circuit is operative to initialize certain raster scan logic which thereafter authorizes the next raster scan sweep. In this manner, each raster scan is synchronized with respect to the cyclical AC power. This synchronization eliminates visible distortion on the video output of the display device.

REFERENCES:
patent: 3598911 (1971-08-01), Helbig
patent: 3916402 (1975-10-01), Hornung

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