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Author Spotlight: An Alternative Approach to Protein Quantification by Bradford Assay Using a Smartphone

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Published on: September 8, 2023

Scalable visible light communications with a micro-LED array projector and high-speed smartphone camera.

Alexander D Griffiths, Johannes Herrnsdorf, Michael J Strain

|June 6, 2019

Summary

High-speed data transmission is now possible using smartphone cameras and micro-LED projectors. This visible light communication system achieves 122.88 kb/s over meter distances, overcoming typical frame rate limitations.

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Area of Science:

Optoelectronics
Wireless Communication
Consumer Electronics

Background:

Solid-state camera systems in consumer electronics offer potential for visible light communication (VLC).
Current VLC data rates are often limited by standard image sensor and projector frame rates (e.g., 60 fps).
Advancements in high-frame rate displays and smartphone cameras enable higher-speed signal transmission and capture.

Purpose of the Study:

To present a novel method for data transmission to smartphones using a micro-LED projector system.
To demonstrate high-speed spatial data transfer leveraging advanced camera and display technologies.

Main Methods:

Utilized a CMOS-controlled micro-LED projector system to display spatial patterns.
Projected data at a 480 Hz refresh rate onto a surface.
Captured projected data using a smartphone camera with a 960 fps frame rate.
Implemented an alignment frame for motion and misalignment tolerance over meter-scale distances.

Main Results:

Achieved a peak data transmission rate of 122.88 kb/s with a 16x16 micro-LED array.
Demonstrated data transfer over meter-scale distances.
System showed tolerance to motion and misalignment due to the alignment frame.

Conclusions:

The developed system successfully transmits data to smartphones using visible light communication.
The method overcomes traditional frame rate limitations for camera-based receivers.
The system is scalable to Mb/s rates with higher resolution transmitters, indicating significant potential for future applications.