Electronics for arrayed photosources

Details Electronics for arrayed photosources Electronics for arrayed photosources

1982-08-30

1984-06-19

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

346107A, 358293, 358294, 358240, 358241, H04N 124

Patent

active

044555784

ABSTRACT:
Regarding any given light source in an array thereof, apparatus according to the invention comprises a shift register adapted to store bits corresponding to the ON times for the light source. The output of the shift register is applied to the light source and, when a ONE bit occurs at the shift register output concomitantly with the application to the light source of a pulse from a train thereof, the light source turns ON. The pulses in the train thereof are of binary weighted durations. By making the duty cycle of at least the 2.degree. pulse of the pulse train fairly low, and by employing a secondary pulse train to effect shifting of bits within the register simultaneously with, or before, the occurrence of the binary weighted pulses, the maximum shift frequency within the shift register--as opposed to that which would be required by prior art apparatus that employs a bit weighted clock for shifting within the register--is lessened appreciably.

REFERENCES:
patent: 3740570 (1973-06-01), Kaelin et al.
patent: 4021607 (1977-05-01), Amano
patent: 4074318 (1978-02-01), Kapes, Jr.
patent: 4074319 (1978-02-01), Goldschmidt et al.
patent: 4074320 (1978-02-01), Kapes, Jr.
"Variable Resolution Linear Array Scanner", by A. J. Dattilo and M. C. Nielson, IBM Technical Disclosure Bulletin, vol. 22, No. 6, Nov. 1979, p. 2250.

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