This document presents information on Li-Fi technology. It begins with acknowledgements and an index of the presentation objectives, which include an introduction, working concept, benefits over radio waves, application fields, and conclusions. The presentation then discusses the history of Li-Fi beginning in the 1990s, defines it as transmission of data through illumination of light using LED bulbs, and explains how it works by varying light intensity faster than the human eye can detect to transmit digital 1s and 0s. It highlights reasons for using visible light communication rather than radio waves, including capacity, security and economic benefits. Application fields of Li-Fi are presented, along with the drawback of light obstruction, before concluding with predictions about its future potential.

1. Li-Fi Technology
Presented by :Bikash kr Bhagat
Softwarica
College of IT and E-Commerce
01/24/14
Batch:-10c
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2. ACKNOWLEDGEMENT
I thank my presentation guide to pramod sir
for giving me an suggestion to learn and
present this presentation, If not for the above
mentioned people my presentation never
would have been completed successfully.
I once again extend my sincere thanks to
all of them.
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3. INDEX OF REPORT OBJECTIVES
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Objectives Name
Introduction
Working concept
Why only VLC ?
Issue with radio wave
Benefit with light wave
Differences between the technologies
Application field of Li-Fi
Drawbacks
Conclusion
Reference
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4. History
> The technology truly
began during the 1990’s
in country like
Germany, Korea, and
Japan where they
discovered LED’s could
be retrofitted to send
information. Harald
Hass continues to wow
the world with the
potential to use light for
communication.
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5. What is Li-Fi
• Li-Fi is a transmission of data through
illumination of light, i.e. sending data
through a LED bulb that varies in intensity
faster than human eye can follow
• Li-Fi - LIGHT FIDEALITY
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6. How Li-Fi Works ?
• If the led is on, you transmit a digital 1, if its off you
transmit 0. The LEDs can be switched on and off
very quickly which gives nice opportunities for
transmitting data.
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7. Working Concept
Transmitting and receiving element
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8. Why only VLC
• VLC – Visual Light Communication
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9. Issue with radio wave
CAPACITY
>The current system
makes use of radio
waves
SECURITY
>These radio waves
can easily penetrate
through the wals,
>With the increasing
thus letting
number of mobile
connections the
anonymous users to
availability of spectrum
use the network.
is getting congested.
ECONOMIC
>Due to the limited
availability of the radio
waves the tariff rates are
relatively costlier.
>This can pose
>Radio waves forms only a
threat if the people
small fraction of the
entire EM spectrum
with bad intentions
thus making the
start using it.
problem even worse.
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10. Benefit with Light waves
CAPACITY
SECURITY
>Light is a readily
>It can not pass
through any obstacle
available form of
i.e. wall
energy and it
covers major
portion of EM
spectrum
>Visible light
spectrum is
10000 times more
compared to radio
wave spectrum.
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ECONOMIC
>The tariff rates can
be very cheep as
light waves are a
cheap resources.
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11. 01/24/14
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12. Application field of Li-FI
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13. Drawback
• Any obstacle can disturb the data transfer
which may cause data lose, i.e. Sunlight
and colorful light may disturb the
communication.
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14. Conclusion
•Li Fi will make be a awesome technology driven in near future
•With its magic of light it can make our world a
greener,safer,cleaner
and moreover a brighter place to live.
Reference
Websites
http://www.lifi.com/pdfs/TechBriefHowLIFIWorks.pdf
http://www.slideshare.net/anilkumarkaramkanti/li-fi-technology-22587176
http://www.youtube.com/watch?v=CASz5njh6NA

15. Any Query???
• Thank you!!!
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