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:
Oct. 20, 1981
Filed:
Dec. 03, 1979
Fumihiro Ogasawara, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A charge accumulation type photosensor array (21) is reciprocated perpendicular to the direction of a row of photosensor elements of the array (21) to scan an original document (22). A timing pulse generator (48) produces timing pulses (E) corresponding to incremental movements of the array (21). All of the photosensor elements produce data signals (Vid) at outputs thereof in series in response to each timing pulse (E). An enable signal (L) is produced when the array (21) is moving in an effective scan area in which the array (21) is moving at constant speed and the periods of the timing pulses (E) are constant. Binary data signals (D) are stored in a memory (44) only while the enable signal (L) is being produced. The charge accumulation times of the photosensor elements in the effective scan area are constant, and especially the charge accumulation time in the first increment of movement in the effective scan area is the same as in the succeeding increments.