The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 1987
Filed:
Sep. 06, 1984
Toshitaka Aagano, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
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.