Invention Grant
- Patent Title: Small pixel high dynamic range pixel sensor
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Application No.: US16708111Application Date: 2019-12-09
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Publication No.: US11089244B2Publication Date: 2021-08-10
- Inventor: Hung T. Do , Chenguang Gong , Paul G. Lim , Alberto M. Magnani
- Applicant: BAE Systems Imaging Solutions Inc.
- Applicant Address: US CA San Jose
- Assignee: BAE Systems Imaging Solutions Inc.
- Current Assignee: BAE Systems Imaging Solutions Inc.
- Current Assignee Address: US CA San Jose
- Agent Calvin B. Ward
- Main IPC: H04N5/355
- IPC: H04N5/355 ; H01L27/146 ; H04N5/378 ; H04N5/3745

Abstract:
An imaging array and a pixel sensor are disclosed. One of the pixel sensors in the imaging array includes a photodiode having a cathode connected to an electron storage node and an anode connected to a hole storage node. An overflow path connects the electron storage node via an overflow gate that allows electrons to leak off of the electron storage node into the overflow path if the electron storage node has a potential less than a leakage potential. A floating diffusion node is connected to the electron storage node by a transfer gate and the overflow path by an overflow path gate. A hole storage node reset gate connects the hole storage node to ground. A hole storage capacitor is connected between the hole storage node and ground, and an overflow path coupling capacitor connects the hole storage node to the overflow path.
Public/Granted literature
- US20210176414A1 SMALL PIXEL HIGH DYNAMIC RANGE PIXEL SENSOR Public/Granted day:2021-06-10
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