A Secured Light Fidelity Transmitter Using Low Flicker LEDs Array

An increasing number of cutting-edge technologies have emerged due to the demand for high data rates. The radio frequency spectrum is becoming increasingly congested with the proliferation of wireless devices. Additionally, radio waves are restricted in areas susceptible to electromagnetic interference (EMI). Visible light communication (VLC) offers a promising alternative to radio-based communication. To demonstrate VLC’s data transmission capabilities using modulated LED light, this study focuses on visible light as a medium for data exchange. The paper introduces an innovative LED driver design that reduces flicker and enhances data transmission efficiency in VLC systems. Flicker in LED lighting can cause visible discomfort and health issues, making efficient VLC systems crucial for high-speed data transfer. Our designed driver employs advanced pulse-width modulation (PWM) techniques and optimized current regulation to stabilize light output and minimize flickering. Furthermore, it supports sophisticated modulation schemes, significantly improving data transmission rates and reliability. Experimental results show a remarkable reduction in flicker index to 0.05. The paper also discusses the characteristics of VLC through Matlab simulation.