Visible Light Communication (VLC) has emerged as an alternative to WiFi and Bluetooth, but the long-standing assumption that it requires visible light beams to work has prevented its adoption.
However, researchers from Dartmouth College in the U.S. say they have found a solution to the problem by encoding VLC wireless data into ultra-short high-frequency pulses that photodiodes can detect in the dark. For end users/consumers, this means that visible light can be reused in many scenarios that were never considered possible until now.
The researchers also noted how Darklight serves as an inexpensive wireless communications alternative by using existing LED lights in smart phones and other devices for the Internet of Things (IoT) applications.
Darklight communication works even when LEDs emit extremely low luminance, by encoding data into ultra-short, imperceptible light pulses with off-the-shelf and low-cost LEDs and photodiodes, the researchers said.