VLC (Li-Fi)

Technical Explanation

Visible Light Communications (VLC), commercially known as Li-Fi, turns overhead room lighting fixtures into high-speed optical access points. By modulating the intensity of solid-state LED or micro-LED lamps at frequencies imperceptible to the human eye, Li-Fi delivers multi-gigabit data streams to photodetectors embedded in laptops and smartphones, providing massive bandwidth in congested conference halls and lecture theaters.

Key Functions

• Utilizing visible light wavelengths (380 nm to 780 nm) for wireless data transmission
• Zero electromagnetic interference allowing safe use in aircraft and intensive care units
• Physical security: light cannot penetrate opaque walls, preventing eavesdropping from outside rooms
• Dual-purpose infrastructure combining interior illumination with multi-gigabit data pipes
• High energy efficiency exploiting already-installed commercial LED lighting grids