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:
Sep. 02, 2008
Filed:
Aug. 25, 2004
Nobuyuki Yamada, Kyoto, JP;
Kenji Yamamoto, Kyoto, JP;
Nobuyuki Yamada, Kyoto, JP;
Kenji Yamamoto, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
The invention relates to a technique removing a dark voltage noise signal occurring at the time of light shielding of a photoelectric conversion device, simplifying the system configuration such that the cost and occupying area is reduced, and suppressing variation among a plurality of buffer amplifiers. In order to obtain such a photoelectric conversion device, a photoelectric conversion elementincludes: a first accumulating unitthat accumulates an output signal outcoming from the photoelectric conversion element during a first period; a second accumulating unitthat accumulates an output signal outcoming from the photoelectric conversion element during a second period different from the first period; first and second switch unitsandused for selectively introducing the output signal from the photoelectric conversion elementto the first or second accumulating unit; and an output unit that outputs output signals from the first and second accumulating unitsandby inversing the polarity of the first accumulating unit