ByG Durga Prasanth - 12M11A0506

K Chinna Sai - 12M11A0515

SEMINAR ON

Technology

What is Li-Fi ?

Invention

Why only VLC

Design Perspective

Working Sample

Applications

Li-fi vs Wi-fi

Li-fi Environment

Advantages

Disadvantages

References

Conclusion

I-Fi Means “Light Fidelity”. Li-Fi is transmission of

data through illumination, i.e., sending data through a

LED bulb that varies in intensity faster than human eye

can follow

It is Fast and cheap Optical Version of Wi-Fi, based

on VLC- Visible Light Communication

Li-Fi Technology Was

Invented By A German

Physicist HARALD HAAS

He demonstrated it in the

year 2012

RadioWaves

InfraredRays

VisibleRays

Ultra violetRays

X-Rays

GammaRays

Expensive, Less Secure

Causes Eye problem

Best to Use

Effects Human Body

Health Issues

Dangerous

STREAMING CONTENT

LAMPDRIVER

Receiver Dongle

Received App Data

Photo Detector

Amplification & Processing

POWER

Data Transfer upto 1GbpsNearly 1024 Mbps

Data Transfer upto 54Mbps

Uses the Visible light portion

Uses the Radio wave portion

Uses Light as Carrier Uses Radio spectrum

Cheaper Expensive

Giga MIMO

Giga Shower

Giga Spot

Giga BeamGiga Dock

10000 times more spectrum than Radio Waves

Highly Efficient because LED consumes Less energy.

Provides Light as well as Data Simultaneously.

Great High Data Transfer.

1011110010001001010111101010101110111010101111101001100111101001111010110000

101010

Light can’t pass through

objects.

High installation cost of VLC

systems.

Interferences like sun light,

external bulb, lights may cause

interruption to data transfer

from LED

Challenge facing LI-FI is how

the receiving device will

transmit back to transmitter

?

The possibilities are numerous and can be

exploded further. If this technology can be

put into practical use, every Bulb can be

used something like a Wi-Fi Hotspot

Slide Share:

www.slideshare.net/shyamrade/lifi-

technology-37544985

http://www.slideshare.net/chaudharyvihan/li

-fi-27431642?related=1

http://www.slideshare.net/tanshu9871/ppt-

on-lifi-technology?related

Wikipedia:

http://en.wikipedia.org/wiki/Li-Fi

Designed By

G.Durga Prasanth