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An image sensor and method for extracting real-time motion

An image sensor and pixel technology, applied in the field of sensors, can solve problems such as enlargement, and achieve the effect of avoiding excessive simplification, realizing low cost and reducing transmission volume.

Active Publication Date: 2022-06-03
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the continuous improvement of the imaging quality of image sensors, the amount of raw image data generated by image sensors continues to increase, which brings great pressure to data transmission and processing.

Method used

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  • An image sensor and method for extracting real-time motion
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  • An image sensor and method for extracting real-time motion

Examples

Experimental program
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Embodiment 1

[0039] The reset unit includes a transistor T2, a transistor T3, and a transistor T4, and the source of the transistor T2 is connected to the photosensitive

[0041] Among them, the photodiode is used to convert the incident light signal received on the pixel into an electrical signal. capacitors are used to

[0042] The image sensor also includes a signal selection processing module, as shown in Figure 2, the signal selection processing module package

[0045] When the output terminal of the voltage comparator outputs a high level, the data selector outputs Vout0, when the voltage

[0048] Specifically, the different photosensitive periods are 0 or n, where n≧1.

[0050] For the 0th photosensitive cycle:

[0054] For the nth photosensitive period (n>=1)

[0056] In the exposure stage, the photodiode generates a photo-generated charge to change the voltage value of pd;

[0057] In the readout stage, when the C1 voltage is charged to the signal voltage Vn after the exposure, the vo...

Embodiment 2

[0061] The present embodiment implements a method for applying the image sensor to extract real-time motion, as shown in FIG. 5 ,

[0067] Specifically, the inter-frame differential pixels have different photosensitive periods, and the different photosensitive periods all include reset steps

[0068] Specifically, in the 0th photosensitive period, in the reset phase, the reset unit is responsible for the photo-generated charge storage node.

[0071] In the above embodiment, the photodiode of the photosensitive portion can be replaced by other photosensitive elements, such as inductive coupling

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Abstract

The present application relates to the field of sensor technology, in particular, the present application relates to an image sensor for extracting instant motion and a method thereof. The sensor includes inter-frame differential pixels, and the inter-frame differential pixels include a photosensitive differential unit, a reset unit, and an output unit, wherein the photosensitive differential unit includes a photodiode, a capacitor, and a first transistor, and one end of the photodiode is connected to a power supply, and the other end is connected to The gate terminal of the first transistor is defined as a photogenerated charge storage node, the source of the first transistor is connected to the power supply, and the drain is connected to the upper plate of the capacitor, and the photodiode is used to receive the incident light signal on the pixel and convert it Converted into photo-generated charge and stored in the photo-generated charge storage node. The image sensor of the present application does not add complex functional modules to the pixels, and selectively outputs data in the pixel array signal readout circuit, which can effectively reduce the amount of image data transmission, image processing delay, and resource consumption, thereby improving image processing. efficiency.

Description

An image sensor and method for extracting real-time motion technical field The application relates to sensor technology field, more specifically, the application relates to a kind of graph that extracts instant motion like sensors and their methods. Background technique [0002] In recent years, image sensing and processing systems have been widely used in production and life. In the existing mainstream image sensor In the processing system, the image signal generated by the image sensor needs to be completely output to the image processing system for calculation. [0003] However, with the continuous improvement of the imaging quality of the image sensor, the raw image data generated by the image sensor The ever-increasing amount of data has brought enormous pressure on data transmission and processing. At the same time, edge computing, Internet of Things and other fields have low demand for high-speed and low-speed The increasing demand for power-consumption image ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/378
CPCH04N25/75
Inventor 杜刚刘力桥
Owner PEKING UNIV
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