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公开(公告)号：US10404928B2
公开(公告)日：2019-09-03
申请号：US15642927
申请日：2017-07-06
发明人： Yu Hin Desmond Cheung , Amit Mittra , Yang Wu
摘要： The invention is directed to a method of operating an image sensor. A first integration is performed on a first photodiode of a pixel circuit to obtain at least one first image signal. A second integration is performed on a second photodiode of the pixel circuit to obtain a second image signal, the first photodiode having a photodiode area larger than the second photodiode. A third integration is performed by collecting blooming charge overflowing from the first photodiode to obtain an overflow image signal. The first integration has longest integration time and the third integration has shortest integration time among the first integration, the second integration and the third integration.
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公开(公告)号：US20200221047A1
公开(公告)日：2020-07-09
申请号：US16826305
申请日：2020-03-23
发明人： Hack soo Oh , Yu Hin Desmond Cheung , Kihong Kim
IPC分类号： H04N5/3745 , H04N5/378
摘要： A pixel circuit is disclosed. The pixel circuit includes a photodiode (PD), a transmission circuit, a reset circuit, a signal storage circuit and a buffer circuit. The transmission circuit is coupled between the PD and an ordinary floating diffusion (FD) node. The reset circuit is coupled to the ordinary FD node. The signal storage circuit is coupled to the ordinary FD node. The buffer circuit is coupled to the ordinary FD node. The signal storage circuit may store a PD signal on a specific node having a reduced leakage path in comparison with the ordinary FD node during a holding phase of the pixel circuit, wherein the holding phase is a time interval starting from a first time point at which the PD signal is stored on the specific node and ending at a second time point at which the pixel circuit is selected for performing a read-out operation.
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公开(公告)号：US20190014276A1
公开(公告)日：2019-01-10
申请号：US15642927
申请日：2017-07-06
发明人： Yu Hin Desmond Cheung , Amit Mittra , Yang Wu
CPC分类号： H04N5/3591 , H04N5/3535 , H04N5/35554 , H04N5/35563 , H04N5/3575 , H04N5/37457 , H04N5/378
摘要： The invention is directed to a method of operating an image sensor. A first integration is performed on a first photodiode of a pixel circuit to obtain at least one first image signal. A second integration is performed on a second photodiode of the pixel circuit to obtain a second image signal, the first photodiode having a photodiode area larger than the second photodiode. A third integration is performed by collecting blooming charge overflowing from the first photodiode to obtain an overflow image signal. The first integration has longest integration time and the third integration has shortest integration time among the first integration, the second integration and the third integration.
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公开(公告)号：US11128829B2
公开(公告)日：2021-09-21
申请号：US16884078
申请日：2020-05-27
发明人： Hack soo Oh , Yu Hin Desmond Cheung , Kihong Kim
IPC分类号： H04N5/3745 , H04N5/378 , H01L27/146 , H04N5/353
摘要： A pixel circuit includes a front-end circuit, a signal storage circuit, and an output circuit. All of the front-end circuit, the signal storage circuit and the output circuit are coupled to a common floating diffusion (FD) node. The front-end circuit is arranged to generate pixel signals. The signal storage circuit is arranged to store the pixel signals generated by the front-end circuit, wherein when the pixel circuit is selected for performing a read-out operation, the pixel signals stored in the signal storage circuit are pulled up from original voltage levels to other voltage levels higher than the original voltage levels according to a voltage increment applied to a control voltage of the signal storage circuit. When the pixel circuit is selected for performing the read-out operation, the output circuit generates output signals on an output terminal according to voltage levels of the common FD node, respectively.
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公开(公告)号：US10917596B2
公开(公告)日：2021-02-09
申请号：US16181345
申请日：2018-11-06
发明人： Hack soo Oh , Yu Hin Desmond Cheung , Kihong Kim
IPC分类号： H04N5/3745 , H04N5/378 , H01L27/146 , H04N5/353
摘要： A pixel circuit is disclosed. The pixel circuit includes a photodiode (PD), a transmission circuit, a reset circuit, a signal storage circuit and a buffer circuit. The transmission circuit is coupled between the PD and an ordinary floating diffusion (FD) node. The reset circuit is coupled to the ordinary FD node. The signal storage circuit is coupled to the ordinary FD node. The buffer circuit is coupled to the signal storage circuit. The signal storage circuit may store a PD signal on a specific node having a reduced leakage path in comparison with the ordinary FD node during a holding phase of the pixel circuit, wherein the holding phase is a time interval starting from a first time point at which the PD signal is stored on the specific node and ending at a second time point at which the pixel circuit is selected for performing a read-out operation.
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公开(公告)号：US10791291B2
公开(公告)日：2020-09-29
申请号：US16191398
申请日：2018-11-14
发明人： Hack soo Oh , Yu Hin Desmond Cheung , Kihong Kim
IPC分类号： H04N5/3745 , H04N5/378 , H01L27/146 , H04N5/353
摘要： A pixel circuit includes a front-end circuit, a signal storage circuit, and an output circuit. The signal storage circuit is coupled to the front-end circuit, and the output circuit is coupled to the signal storage circuit. The front-end circuit is arranged to generate pixel signals. The signal storage circuit is arranged to store the pixel signals generated by the front-end circuit, wherein when the pixel circuit is selected for performing a read-out operation, the pixel signals stored in the signal storage circuit are pulled up from original voltage levels to other voltage levels higher than the original voltage levels according to a voltage increment applied to a control voltage. When the pixel circuit is selected for performing the read-out operation, the output circuit generates output signals on an output terminal according to the other voltage levels, respectively.
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公开(公告)号：US11172153B2
公开(公告)日：2021-11-09
申请号：US16826305
申请日：2020-03-23
发明人： Hack soo Oh , Yu Hin Desmond Cheung , Kihong Kim
IPC分类号： H04N5/3745 , H04N5/378 , H01L27/146 , H04N5/353
摘要： A pixel circuit is disclosed. The pixel circuit includes a photodiode (PD), a transmission circuit, a reset circuit, a signal storage circuit and a buffer circuit. The transmission circuit is coupled between the PD and an ordinary floating diffusion (FD) node. The reset circuit is coupled to the ordinary FD node. The signal storage circuit is coupled to the ordinary FD node. The buffer circuit is coupled to the ordinary FD node. The signal storage circuit may store a PD signal on a specific node having a reduced leakage path in comparison with the ordinary FD node during a holding phase of the pixel circuit, wherein the holding phase is a time interval starting from a first time point at which the PD signal is stored on the specific node and ending at a second time point at which the pixel circuit is selected for performing a read-out operation.
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公开(公告)号：US20200077041A1
公开(公告)日：2020-03-05
申请号：US16191398
申请日：2018-11-14
发明人： Hack soo Oh , Yu Hin Desmond Cheung , Kihong Kim
IPC分类号： H04N5/3745 , H04N5/378
摘要： A pixel circuit includes a front-end circuit, a signal storage circuit, and an output circuit. The signal storage circuit is coupled to the front-end circuit, and the output circuit is coupled to the signal storage circuit. The front-end circuit is arranged to generate pixel signals. The signal storage circuit is arranged to store the pixel signals generated by the front-end circuit, wherein when the pixel circuit is selected for performing a read-out operation, the pixel signals stored in the signal storage circuit are pulled up from original voltage levels to other voltage levels higher than the original voltage levels according to a voltage increment applied to a control voltage. When the pixel circuit is selected for performing the read-out operation, the output circuit generates output signals on an output terminal according to the other voltage levels, respectively.
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公开(公告)号：US20200288080A1
公开(公告)日：2020-09-10
申请号：US16884078
申请日：2020-05-27
发明人： Hack soo Oh , Yu Hin Desmond Cheung , Kihong Kim
IPC分类号： H04N5/3745 , H04N5/378
摘要： A pixel circuit includes a front-end circuit, a signal storage circuit, and an output circuit. All of the front-end circuit, the signal storage circuit and the output circuit are coupled to a common floating diffusion (FD) node. The front-end circuit is arranged to generate pixel signals. The signal storage circuit is arranged to store the pixel signals generated by the front-end circuit, wherein when the pixel circuit is selected for performing a read-out operation, the pixel signals stored in the signal storage circuit are pulled up from original voltage levels to other voltage levels higher than the original voltage levels according to a voltage increment applied to a control voltage of the signal storage circuit. When the pixel circuit is selected for performing the read-out operation, the output circuit generates output signals on an output terminal according to voltage levels of the common FD node, respectively.
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公开(公告)号：US20200077040A1
公开(公告)日：2020-03-05
申请号：US16181345
申请日：2018-11-06
发明人： Hack soo Oh , Yu Hin Desmond Cheung , Kihong Kim
IPC分类号： H04N5/3745 , H04N5/378
摘要： A pixel circuit is disclosed. The pixel circuit includes a photodiode (PD), a transmission circuit, a reset circuit, a signal storage circuit and a buffer circuit. The transmission circuit is coupled between the PD and an ordinary floating diffusion (FD) node. The reset circuit is coupled to the ordinary FD node. The signal storage circuit is coupled to the ordinary FD node. The buffer circuit is coupled to the signal storage circuit. The signal storage circuit may store a PD signal on a specific node having a reduced leakage path in comparison with the ordinary FD node during a holding phase of the pixel circuit, wherein the holding phase is a time interval starting from a first time point at which the PD signal is stored on the specific node and ending at a second time point at which the pixel circuit is selected for performing a read-out operation.
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