Researchers at the University of Oulu are developing Visible Light Communication (VLC) systems that use flickering white LEDs to transmit data securely without interfering with sensitive equipment in hospitals or aircraft. This technology, known as Li-Fi, modulates light at speeds imperceptible to the human eye to send binary signals, offering a secure alternative to radio waves since the signal cannot penetrate walls. Beyond communication, the project aims to power small IoT sensors using ambient LED light through tiny solar cells, eliminating the need for disposable batteries. The team is also advancing printed electronics to create low-cost, card-sized sensors that can harvest energy and switch between light and radio transmission depending on the environment.
Source: https://www.6gflagship.com/news/future-led-light-illuminates-and-communicates/
Keywords: visible light communication, energy harvesting, printed electronics, sustainable IoT, Li-Fi