Li-Fi Technology

2508 Words Sep 12th, 2013 11 Pages
LI-FI (Light Fidelity)-The future technology in wireless communication

Pooja Abhnag1, Pratima Tarte2

Department of Electronics & Communication

Dr. D. Y. Patil Polytechnic

Abstract— Li-Fi is a new wireless communication technology which enables a wireless data transmission through LED light. Li-Fi is based on a unique ability of solid state lighting systems to create a binary code of 1s and 0s with a LED flickering that is invisible for human eyes. Data can be received by electronic devices with photodiode within area of light visibility. This means that everywhere where LEDs are used, lighting bulbs can bring not only the light but wireless connection at the same time. With
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It uses fast pulses of light to transmit information wirelessly.

Li-Fi Technology at a Glance!
The LED bulb will hold a micro-chip that will do the job of processing the data.
The light intensity can be manipulated to send data by tiny changes in amplitude.
This technology uses visible spectrum of light, a part of the electromagnetic spectrum that is still not greatly utilized.
In fact the technology transfers thousands of streams of data simultaneously, in parallel, in higher speeds with the help of special modulation, using a unique signal processing technology.
Some Points of Li-Fi
The light used to transmit the data is called D-light by Harald Hass, the inventor of Li-Fi. In future data for laptops, Smartphone's, and tablets can be transmitted through the light in a room by using Li-Fi.
Security would be a snap—if you can’t see the light, you can’t access the data.


The LI-FI product consists of 4 primary sub-assemblies:
• Bulb
• RF power amplifier circuit (PA)
• Printed circuit board (PCB)
• Enclosure

The PCB controls the electrical inputs and outputs of the lamp and houses the
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