发明名称 Image sensor providing improved image quality
摘要 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.
申请公布号 US7170556(B2) 申请公布日期 2007.01.30
申请号 US20030618851 申请日期 2003.07.15
申请人 FUJITSU LIMITED 发明人 KOKUBUN MASATOSHI;MIZUGUCHI TOSHITAKA;FUNAKOSHI JUN;KOBAYASHI HIROSHI;YAMAMOTO KATSUYOSI
分类号 H04N1/03;H04N5/335;H04N5/357;H04N5/363;H04N5/369;H04N5/374;H04N5/3745 主分类号 H04N1/03
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