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:
Apr. 20, 1993
Filed:
Apr. 03, 1990
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A close-contact image sensing device has at least a plurality of blocks each including the combinations each consisting of a photo sensing element and a photo sensing element select switch connected in series to the photo sensing element, and a common signal line used, when an image signal is read in each block. A read signal flows through the common signal line. An amount of charge as is stored in an equivalent capacitor of the photo sensing element in accordance with an amount of light incident on the photo sensing element, is transferred to a capacitor connected to the common signal line by turning on the photo sensing element select switch. In the image sensing device, a reset switch is connected at one end to a node between the photo sensing element and the photo sensing element select switch, and at the other end to a ground point. A photo sensing element select signal, which is applied to the photo sensing element select switch in a block in which a read operation will be executed, is also applied as a reset signal to the reset switch in a block in which a read operation has been completed, whereby the charge as still left in the photo sensing element after the charge transfer is drained to the ground point.