Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-06-18
1983-08-16
Griffin, Robert L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358284, 358296, 358282, H04N 140
Patent
active
043994687
ABSTRACT:
A sampled input video signal is supplied to first and second comparators respectively having high and low reference levels, and the outputs of the first and second comparators are checked with each other in synchronism to the timing of the sampling. If the outputs of the first and second comparators are both detected, a thick black dot is printed. If only the output of the second comparator is detected, the pulse duration of a drive pulse output supplied to a printing head is reduced, so that a thin gray dot is printed.
REFERENCES:
patent: 4237495 (1980-12-01), Yamamoto
Coles Edward L.
Griffin Robert L.
Tokyo Shibaura Denki Kabushiki Kaisha
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