Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-06-03
1987-04-28
Faber, Alan
Facsimile and static presentation processing
Facsimile
Recording apparatus
358298, H04N 123, H04N 140
Patent
active
046618597
ABSTRACT:
A one dimensional electronic halftone generating system having a source of digital data representative of pixel greyscale, a counter to store the digital data, and pulse producing logic responsive to the counter to activate a laser modulator in accordance with the digital data representative of each pixel. In particular, a six bit data word represents one of 64 greyscale states for a particular pixel. The pulse producing logic responds to the particular data word to produce a pulse of a given duration or width to drive the laser for a given time period. The duration of the pulse, representing one to 64 states for a given pixel, will produce a given discrete greyscale value for each pixel.
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Mailloux Louis D.
Waldron Brian L.
Chapuran R. F.
Faber Alan
Xerox Corporation
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