Global shutter high-dynamic range pixel and image sensor

Abstract

The invention provides a global shutter high-dynamic range pixel and an image sensor. The global shutter high-dynamic range pixel comprises a light sensing unit, a floating diffusion node, a first charge transfer unit, a second charge transfer unit and a pixel signal output unit; the first charge transfer unit at least comprises a metal oxide semiconductor capacitor to temporarily store at least partial sensing charge transferred from the light sensing unit; the metal oxide semiconductor capacitor is switched-on / not according to the control signal, so that a grid induction potential energy trap is formed in the metal oxide semiconductor capacitor, thereby controlling the transfer of at least partial sensing charge.

Description

technical field [0001] The present invention relates to a global shutter high dynamic range pixel and an image sensor, in particular to a gate-induced potential well formed inside a metal oxide semiconductor capacitor of a global shutter high dynamic range pixel. , thereby controlling the global shutter high dynamic range pixels and image sensors that sense charge transfer. Background technique [0002] The prior art image sensor usually has a plurality of sensing pixels arranged in an array, and the shutter of the image sensor usually has two typical operation modes: Rolling Shutter and Global Shutter. When the shutter operates in a rolling shutter fashion, each column of sensing pixels in the array is charged with light one at a time and each column is read out one at a time. Since each column of sensing pixels is activated sequentially rather than simultaneously (meaning that each column of sensing pixels starts to expose at a different time), when the image sensor captu...

AI Technical Summary

Problems solved by technology

Since each column of sensing pixels is activated sequentially rather than simultaneously (meaning that each column of sensing pixels starts to expose at a different time), when the image sensor captures an image of a fast-moving object, the image captured by the rolling shutter There may be distortion problems

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