Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1984-09-06
1987-08-25
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358268, 358285, H04N 136
Patent
active
046896902
ABSTRACT:
A synchronizing signal generating circuit for timing the image read-out or recording conducted by scanning a recording medium by a light beam comprises two photodetectors positioned at arbitrary points on a main scanning line for detecting the light beam and generating a first pulse signal and a second pulse signal. The circuit is also provided with a first signal generator for changing the period of a pulse signal output thereby in accordance with an input signal, and a second signal generator which receives the pulse signal output by the first signal generator and the first and second pulse signals output by the photodetectors. The second signal generator counts the number of pulses input by the first signal generator during the scanning from when the first pulse signal is input to when the second pulse signal is input, compares the count with a standard set value, and generates a signal corresponding to a difference therebetween. The signal thus generated is input to the first signal generator, thereby controlling so that a pulse signal consisting of pulses in a number corresponding to the standard set value is output as a synchronizing signal.
REFERENCES:
patent: 4349847 (1982-09-01), Traino
Coles Sr. Edward L.
Fuji Photo Film Co. , Ltd.
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