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:
May. 15, 1990
Filed:
Sep. 19, 1988
Kenji Yokota, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
Disclosed is a synchronizing circuit for an optical scanning apparatus in which synchronization of writing of an image in the horizontal direction is achieved using a synchronizing signal generated in response to the output signal of an photo sensor for detecting the light which has passed through a scanning means. The synchronizing circuit includes a frequency dividing circuit for dividing the frequency of a clock pulse train having a predetermined frequency in response to the output signal from the photo sensor, a delay circuit for successively delaying the phase of the frequency divided clock pulse train by a predetermined time interval when it produces output signals, and a selecting circuit for selecting as a synchronizing signal the output of the delay circuit whose phase difference is at a minimum with respect to the output of the photo sensor.