The document presents information on Li-Fi technology. Li-Fi uses light from LED bulbs to transmit data, providing a method of wireless communication faster than Wi-Fi. It was invented in 2011 by German physicist Harald Haas and allows data rates over 10 megabits per second. Li-Fi uses light intensity modulated by LEDs to encode binary data for transmission and has advantages over Wi-Fi like higher speeds, being harmless, and more secure. However, it requires line of sight and needs solutions for two-way transmission. The document outlines Li-Fi's history, working process, advantages, disadvantages and applications.

1. A Presentation
on
Li-Fi Technology
Presented by:-
Saurav Agrawal

2. Contents
 Abstract
 Introduction
 History of Li-Fi
 Working process
 Different Between The Technologies
 Comparison B/W Li-FI and Wi-Fi
 Advantages
 Disadvantage
 Applications
 Conclusion

3. One germen phycist, Harald Haas has
come up with a solution he calls “data
through illumination” –taking the fibber out
of fibber optic by sending data through an
LED light bulb that varies in intensity faster
than the human eye can follow. It’s the same
idea band behind infrared remote controls
but far more powerful. Haas says his
invention, which he calls D- LIGHT, can
produce data rates faster than 10 megabits
per second, which is speedier than your
average broadband connection.
Abstract

4. Introduction
Li-Fi means “Light Fidelity”.
At the heart of this technology is a
new generation of high brightness light-
emitting diodes
It is possible to encode data in the
light by varying the rate at which the LEDs
flicker on and off to give different strings of
1s and 0s.

5. History of LI-FI
• In 2011 the German physicist Harald Hass
demonstrated the technology by streaming
live video at TED global
• Later in 2012 this technology was
demonstrated at consumer electronics show
in las Vegas

6. Working process

9. Different Among The Technologies

10. Comparison B/W li-fi and wi-fi

11. Advantages
 Instant start time
 Easy To Use
 Fast Data Transfer
 Reliable
 Harmless
 Low Cost
 secure

12. Disadvantage
• Works only in line of sight
• Need to with ever changing condition
• How the receiving device will transmit
back to transmitter

13. Application
• You Might Just Live Longer
• Airlines
• Smarter Power Plants
• Undersea Awesomeness

14. Conclusion
The possibilities are numerous and can be explored further. If
his technology can be put into practical use, every bulb can be
used something like a Wi-Fi hotspot to transmit wireless data
and we will proceed toward the cleaner, greener, safer and
brighter future. The concept of Li-Fi is currently attracting a
great deal of interest, not least because it may offer a genuine
and very efficient alternative to radio-based wireless. This may
solve issues such as the shortage of radio-frequency bandwidth
and also allow internet where traditional radio based wireless
isn’t allowed such as aircraft or hospitals. One of the
shortcomings however is that it only work in direct line of sight.