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A Charge-Coupled Phototransistor Enabling Synchronous Dynamic and Static Image Detection.

Shun Feng¹, Ruyue Han^1,2, Chi Liu^1,2

¹Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China.

Advanced Materials (Deerfield Beach, Fla.)

|April 14, 2025

Summary

This summary is machine-generated.

A novel charge-coupled phototransistor captures both dynamic and static visual data simultaneously. This breakthrough in machine vision technology offers higher integration and lower power consumption than existing sensors.

Keywords:

charge‐coupling effect dynamic detection machine vision phototransistor static detection

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Area of Science:

Optoelectronics
Machine Vision
Sensor Technology

Background:

Emerging machine vision demands efficient capture of both dynamic events and static grayscale data.
Current Dynamic Vision and Active Pixel Sensors (DAVIS) technology faces limitations in integration density, power consumption, and clock synchronization due to complex pixel architectures (15-50 transistors).

Purpose of the Study:

To introduce a novel charge-coupled phototransistor capable of simultaneously capturing dynamic and static visual information.
To overcome the limitations of existing DAVIS technology regarding integration density, power consumption, and clock synchronization.

Main Methods:

A charge-coupled phototransistor utilizing dual photosensitive capacitors to control a single transistor channel was developed.
Dual gates (top and bottom) generate photogenerated electrons via charge-coupling; a thick dielectric blocks top gate electrons for static detection, while a thin dielectric allows bottom gate electron tunneling for dynamic event detection.

Main Results:

The device achieves simultaneous capture of dynamic and static information, surpassing current DAVIS technology.
Demonstrated a dynamic range of 120 dB and a response time of 15 µs.
Achieved significantly reduced power consumption (10 pW) and overcame clock synchronization issues.

Conclusions:

The developed charge-coupled phototransistor offers a superior alternative to existing DAVIS technology.
This innovation enables high-performance, low-power, and highly integrated machine vision systems.
Paves the way for advancements in next-generation machine vision applications.