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1.发明授权公开(公告)号：US12114091B2
公开(公告)日：2024-10-08
申请号：US18002798
申请日：2021-06-24
发明人： Yingyun Zha , Roger Mark Bostock , Jian Deng , Yu Zou
IPC分类号： H04N25/771 , G06F7/02 , H03M1/12 , H04N25/40 , H04N25/47 , H04N25/703 , H04N25/766 , H04N25/772 , H04N25/78 , H04N25/79
CPC分类号： H04N25/771 , G06F7/02 , H03M1/12 , H04N25/40 , H04N25/47 , H04N25/703 , H04N25/766 , H04N25/772 , H04N25/78 , H04N25/79
摘要： A delta image sensor comprising a plurality of acquisition circuits corresponding to at least one pixel. Each acquisition circuit includes at least one sensor circuit comprising a photosensor to generate a sensor signal, VSIG, depending on a light signal illuminating the photosensor; at least one single slope analogue to digital conversion, A/D, circuit configured to convert a current VSIG to a digital signal, wherein the A/D circuit (12) is configured to use one of a plurality of ramps for the conversion; at least one digital storage circuit configured to store a representation of at least one digital signal corresponding to a previous VSIG; at least one digital comparison circuit configured to compare the level of the stored representation with the current VSIG to detect whether a changed level is present; and at least one digital output circuit configured to generate an event output, in response to the changed level.
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公开(公告)号：US12047702B2
公开(公告)日：2024-07-23
申请号：US18002792
申请日：2021-06-24
发明人： Yingyun Zha , Roger Mark Bostock , Jian Deng , Yu Zou
IPC分类号： H04N25/771 , G06F7/02 , H03M1/12 , H04N25/40 , H04N25/47 , H04N25/703 , H04N25/766 , H04N25/772 , H04N25/78 , H04N25/79
CPC分类号： H04N25/771 , G06F7/02 , H03M1/12 , H04N25/40 , H04N25/47 , H04N25/703 , H04N25/766 , H04N25/772 , H04N25/78 , H04N25/79
摘要： A delta image sensor comprising an arrangement of pixels and acquisition circuits corresponding to at least one pixel. Each acquisition circuit includes a sensor circuit comprising a photosensor to generate a sensor signal, VSIG, depending on a light signal illuminating the photosensor; at least one analogue to digital conversion, A/D, circuit configured to convert a current VSIG to a digital signal; at least one digital storage circuit configured to store a representation of at least one digital signal corresponding to a previous VSIG; a digital comparison circuit configured to compare the level of the stored representation with the current VSIG to detect whether a changed level is present; and a digital output circuit configured to generate an event output when the level has changed. The repeat rate of the analogue to digital conversion is chosen from one or more repeat rates corresponding to modulation of the light signal.
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公开(公告)号：US11962926B2
公开(公告)日：2024-04-16
申请号：US18002775
申请日：2021-08-04
发明人： Yingyun Zha , Jian Deng , Roger Mark Bostock
IPC分类号： H04N25/77 , H01L27/146 , H04N25/571 , H04N25/766
CPC分类号： H04N25/77 , H01L27/14612 , H04N25/573 , H04N25/766
摘要： The present disclosure relates to an image sensor comprising a plurality of pixel circuits each comprising a photodiode connected between ground and a floating diffusion (FD) node, a reset transistor (MRST) connected between a first voltage supply and the floating diffusion (FD) node, and a source follower transistor (MSF), wherein its drain is connected to a second voltage supply, the gate is connected to a floating diffusion (FD) node and the source is connected to a row select transistor (MSEL). The row select transistor (MSEL) is connected between the source of the source follower transistor (MSF) and a common column output. Each pixel circuit is configured to output an output signal corresponding to a light incident on the photodiode. Each pixel circuit includes at least one additional transistor for configuring each pixel circuit to selectively output a linear integration signal or a logarithmic signal.
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公开(公告)号：US12052524B2
公开(公告)日：2024-07-30
申请号：US18002876
申请日：2021-06-24
发明人： Yingyun Zha , Roger Mark Bostock , Jian Deng , Yu Zou
IPC分类号： H04N25/771 , G06F7/02 , H03M1/12 , H04N25/40 , H04N25/47 , H04N25/703 , H04N25/766 , H04N25/772 , H04N25/78 , H04N25/79
CPC分类号： H04N25/771 , G06F7/02 , H03M1/12 , H04N25/40 , H04N25/47 , H04N25/703 , H04N25/766 , H04N25/772 , H04N25/78 , H04N25/79
摘要： A delta image sensor comprising an arrangement of pixels and a plurality of acquisition circuits corresponding to at least one pixel. Each acquisition circuit includes at least one sensor circuit comprising a photosensor to generate a sensor signal, VSIG, depending on a light signal; at least one analogue to digital conversion, A/D, circuit configured to convert a current VSIG to a digital signal; at least one digital storage circuit configured to store a representation of at least one digital signal corresponding to a previous VSIG; at least one digital comparison circuit to compare the level of the stored representation with the current VSIG to detect whether a changed level is present; and at least one digital output circuit configured to generate an event output under the condition of the changed level. A digital representation may be externally written to the digital storage circuit of the at least one pixel.
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