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Global shutter image sensor pixel structure and signal sampling and reading method thereof

A technology of image sensor and pixel structure, which is applied in image communication, TV, color TV components, etc., can solve the problems of halving the output signal amplitude, small fixed output deviation and parasitic light sensitivity, etc., to reduce readout noise. Effect

Active Publication Date: 2020-07-14
SHENZHEN RGBIC MICROELECTRONICS TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a global shutter image sensor pixel structure, which can solve the problem of halving the output signal amplitude in the existing implementation technology, and has smaller fixed output deviation and parasitic light sensitivity

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  • Global shutter image sensor pixel structure and signal sampling and reading method thereof
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  • Global shutter image sensor pixel structure and signal sampling and reading method thereof

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034]The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments describe...

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Abstract

The invention discloses a global shutter image sensor pixel structure and a signal sampling and reading method thereof. The pixel structure comprises a photosensitive unit, a storage unit and an output unit, wherein the photosensitive unit is connected with the storage unit, the storage unit is connected with the output unit, the storage unit comprises a first amplifier, the first amplifier is connected with the photosensitive unit, the output unit comprises a second amplifier, and the second amplifier is connected with the storage unit; the photosensitive unit is used for generating a reset signal and collecting an image signal; the storage unit is used for amplifying, sampling and storing the reset signal and the image signal generated by global exposure; the output unit is used for amplifying and outputting the reset signal and the image signal so as to obtain effective image information for realizing correlated double sampling. The global shutter pixel circuit structure improves the problem that the signal output amplitude is halved in the existing global exposure image sensor technology.

Description

technical field [0001] The invention relates to the field of semiconductor image sensors, in particular to a global shutter image sensor pixel structure and a signal sampling and reading method thereof. Background technique [0002] A CMOS image sensor is an imaging device widely used at present to convert optical signals into electrical signals. It mainly has two shutter implementation methods, rolling shutter and global shutter. The rolling shutter is implemented through the row-by-row exposure of the pixel array, and each independent row can start the exposure of the next frame after completing the readout of the current pixel row of the previous frame. The minimum time delay for each row to start exposure is the readout time for each row. In this way, the image is read periodically, so that the exposure time of each row is the same, but the start and end points of exposure are different. If there are moving objects in the imaging area, the scanned image will be distort...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/374H04N5/357
CPCH04N25/616H04N25/76H04N25/771
Inventor 李志升郭佳许阳
Owner SHENZHEN RGBIC MICROELECTRONICS TECH CO LTD
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