Light Fidility Technology that use light to transmit data

1. Li-Fi
LIGHT FIDILITY
BY TEAM DHRUVA

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Table of
Contents
Introduction
Conclusion
Working Principle
How it works ?
LiFi Vs Wi-Fi
General Comparison
Applications
Where they are used ?
Benefits & Limitations
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What is LiFi and Its History

3. What is Li-Fi ?
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• Light Fidelity
• High speed bi-directional networked and mobile data communication
• Data transmission through illumination i.e,. sending data through a LED light

4. History
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• Invented by Professor Harald Haas
• Introduced as PureLiFi(formerly PureVLC) at his
2011 -TED Global Talk
• Inspired from VLC(Visible light communication) by
LEDs research on 1990’s

5. How it works ?

6. Working Principle
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Step 1
Step 2
Step 3
Step 4
The information from the server passes through
a streaming content into a Lamp Driver which
can be turned on and off
The photo detector installed in the device
recognizes the changes and converts it into
electrical signal and further into binary data
The Lamp Driver feeds data into the LED Lamp
through Signal Processing Technology(SPL)
Data embedded in the beam passes through the
lamp with tiny changes(dimming) in the rapidly
passing light

7. Why LED’s ?
• Incandescent bulbs have a lifespan of around
2,000 hours, while LED have as much as 50,000
hours
• Power consumption is less
• Available at affordable cost
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8. Li-Fi
Vs
Wi-Fi

9. RETAIL
LED-based indoor position
technology can not only
assist customers in finding
way around retail
environment, but people
can also receive product
information like sales item
through smart phones.
TRAFFIC SYSTEM
It not only provide high-
speed connectivity via
street lamps, but also
allows automobiles with
Li-Fi enabled headlights
to communicate with
traffic lights to improve
real-time traffic updates.
HOSPITALS
It can be used in
operation theatres and
other radiation prevented
zones in the hospital as
it communicates only
through visible light
waves.
RADIATION ZONES
Cellular network signals
are dangerous in
petrochemical plants due
to an antennas’ ability to
cause sparks or
electrical explosions..
AIRCRAFTS
Airline travellers would
be able to enjoy high-
speed connectivity using
Li-Fi LED lights
Future Uses of LiFi

10. Benefits
• Very high peak data rates ( Upto 10 Gbps)
• Enabling IoT (Internet of things)
• Secured wireless communication
• Energy efficient data transmission
• Underwater data transmission
• Radiation free environment
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11. Limitations
• Light can't pass through objects.
• A major challenge facing is how the
receiving device will transmit back to
transmitter.
• High installation cost of the VLC systems
• Interferences from external light sources like
sun , light , normal bulbs , opaque materials
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12. Conclusion
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In spite of disadvantages if this technology can be put into practical use, every bulb can be
used something like a Li-Fi hotspot to transmit wireless data and we will proceed toward
the cleaner, greener, safer and brighter future
Google’s Project Loon and Facebook’s Aquila are the ongoing LiFi projects

13. THANK YOU
ANY QUESTIONS?