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Image sensor for extracting instant motion and method thereof

An image sensor, pixel technology, applied in the field of sensors, can solve problems such as enlargement

Active Publication Date: 2021-08-31
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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  • Image sensor for extracting instant motion and method thereof
  • Image sensor for extracting instant motion and method thereof
  • Image sensor for extracting instant motion and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment implements an image sensor for extracting real-time motion, such as figure 1 As shown, including inter-frame difference pixels, the inter-frame difference pixels include:

[0038]The photosensitive differential unit includes a photodiode, a capacitor and a transistor T1. One end of the photodiode is connected to the power supply, and the other end is connected to the gate terminal of the transistor T1, which is defined as the photo-generated charge storage node pd. The upper plate of the capacitor, the photodiode is used to receive the incident light signal on the pixel and convert it into photo-generated charge and store it in the photo-generated charge storage node pd, the upper plate of the capacitor is used to buffer the original pixel signal, and the lower part of the capacitor is used for buffering the original pixel signal. The plate is used to generate and buffer the differential signal between pixel frames;

[0039] The reset unit includes a tr...

Embodiment 2

[0061] This embodiment implements a method for extracting real-time motion by applying the image sensor, such as Figure 5 shown, perform the following steps:

[0062] S1. The inter-frame differential pixel provides the original pixel signal output Vout0 and the pixel inter-frame differential signal output Vout1 to complete the photosensitive and real-time signal differential calculation;

[0063] S2. Connect the negative input terminal of the voltage comparator to the reference voltage, and connect the positive input terminal of the voltage comparator to the pixel frame differential signal output Vout1;

[0064] S3. Connect the first input end of the data selector to the output end of the voltage comparator, and connect the second input end of the data selector to the original pixel signal output Vout0;

[0065] S4. When the output terminal of the voltage comparator outputs a high level, the data selector outputs Vout0, and when the output terminal of the voltage comparator ...

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Abstract

The invention relates to the technical field of sensors, in particular to an image sensor for extracting instant motion and a method thereof. The sensor comprises an inter-frame differential pixel, the inter-frame differential pixel comprises a photosensitive differential unit, a reset unit and an output unit, the photosensitive differential unit comprises a photodiode, a capacitor and a first transistor, one end of the photodiode is connected with a power supply, the other end of the photodiode is connected with the gate end of the first transistor, and the end is defined as a photo-generated charge storage node; a source electrode of the first transistor is connected with a power supply, a drain electrode is connected with an upper electrode plate of the capacitor, and the photodiode is used for receiving an incident light signal on a pixel and converting the incident light signal into photo-generated charges to be stored in a photo-generated charge storage node. According to the image sensor, no complex function module is added in the pixel, and the data is selectively output in the pixel array signal reading circuit, so that the image data transmission quantity, the image processing delay and the resource consumption can be effectively reduced, and the image processing efficiency is further improved.

Description

technical field [0001] The present application relates to the field of sensor technology, and more particularly, to an image sensor for extracting real-time motion and a method thereof. Background technique [0002] In recent years, image sensing and processing systems have been widely used in production and life. In the existing mainstream image sensing and processing systems, 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 image sensors, the amount of raw image data generated by the image sensors continues to increase, which brings enormous pressure to data transmission and processing. At the same time, the demand for high-speed and low-power image processing in areas such as edge computing and the Internet of Things is getting higher and higher, and more efficient image sensing and processing systems are required. [00...

Claims

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Application Information

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IPC IPC(8): H04N5/378
CPCH04N25/75
Inventor 杜刚刘力桥
Owner PEKING UNIV
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