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:
Nov. 29, 1988
Filed:
Nov. 13, 1987
Masayuki Tamada, Miyagi, JP;
Junichi Takahashi, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Tohoku Ricoh Co., Ltd., Miyagi, JP;
Abstract
An image sensor driving circuit for driving an image sensor by applying a voltage thereto comprises a voltage supplying circuit for supplying a positive or negative polarity voltage to the image sensor responsive to a control signal, a converting circuit for converting an output photocurrent of the image sensor into a detection voltage, an inverting circuit for inverting the detection voltage responsive to the control signal, and a control circuit for generating the control signal. The control signal has a predetermined period so that the voltage supplying circuit alternately supplies the positive and negative polarity voltages with the predetermined period and the inverting circuit inverts the detection voltage only during one of first and second halves of each period of the control signal.