Visible light communication LiFi

Visible light communication is a wireless communication technology that utilizes the flickering signals emitted by light sources such as fluorescent lamps or light-emitting diodes (LEDs) to achieve information transmission. When using a regular fluorescent lamp, its transmission capacity is 10kbit/s. When using LED lights, it can reach 500Mbit/s and the transmission distance can reach 1-2 kilometers.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

Visible light communication is a wireless communication technology that uses flickering signals emitted by objects such as fluorescent lamps or light-emitting diodes (LEDs) to transmit information. The frequency of visible light ranges from 400 THz (wavelength 780 nm) to 800 THz (wavelength 375 nm). When using a regular fluorescent lamp, its transmission capacity is 10 kbit/s. When using LED lights, it can reach 500 Mbit/s. The transmission distance can reach 1-2 kilometers, and its biggest feature is the ability to combine solid-state lighting technology. Light, like radio waves, is a type of electromagnetic wave, and the basic principle of transmitting network signals is also the same. Using LED lights as signal transmission sources, encoding information by adding a microchip to the LED bulb to control the on/off of the light. The light on indicates "1" and the light off indicates "0". LED.