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:
Jan. 30, 2007
Filed:
Jul. 15, 2003
Masatoshi Kokubun, Aichi, JP;
Toshitaka Mizuguchi, Kawasaki, JP;
Jun Funakoshi, Kawasaki, JP;
Hiroshi Kobayashi, Kawasaki, JP;
Katsuyosi Yamamoto, Kawasaki, JP;
Masatoshi Kokubun, Aichi, JP;
Toshitaka Mizuguchi, Kawasaki, JP;
Jun Funakoshi, Kawasaki, JP;
Hiroshi Kobayashi, Kawasaki, JP;
Katsuyosi Yamamoto, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An image sensor for capturing image, has: a plurality of pixels arranged in a matrix each including a photoelectric conversion element for generating current according to received light intensity and a reset transistor for resetting a node of the photoelectric conversion element to a reset potential; and a sample hold circuit for sample holding a pixel potential according to the potential of the node of the pixel. And the sample hold circuit outputs the differential potential, between a first pixel potential at an end of the integration period after a first reset operation of the pixel and a second pixel potential at an end of a reset noise read period after a second reset operation after the integration period, as a pixel signal. Also in the sample hold circuit, when the second pixel potential during the reset noise read period exceeds a predetermined threshold level, the second pixel potential is set to a predetermined reference potential.