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BY
PAVAN KUMAR.DEVABHAKTHUNI
OBJECTIVES
What is Li fi??
Construction of Li fi???
Working of Li fi!!!
Comparison between Wi-Fi and Li-fi
How Li-fi is different??
Applications of Li-fi…..
Advantages of Li-fi…….
Conclusion……
What is Li-fi????
Li-fi stands for LIGHT FIDELITY
Li-fi is transmission of data
through illumination sending data
through a LED light bulb that varies
in intensity faster than the human
eye can follow
Construction of Li-fi??
The Li-fi product consists of 4 primary
sub-assemblies:
 Bulb
 RF Power Amplifier Circuit(PA)
 Printed Circuit Board(PCB)
 Enclosure
Working of Li-fi!!!!
Its working is much simply explained as
follows:
 If the LED is on, the digital “1” is
transmitted.
 And it is off, the digital “0” is
transmitted.
 It is possible to encode data in the
light by varying the rate at which the
LED’s flicker on and off to give different
strings of 1s and 0s
Comparison between Wi-Fi and Li-fi
s.no parameter Li-fi Wi-Fi
1 SPEED >1 GB/s Around 150Mb/s
2 Medium of data transfer Use light as carrier Use radio spectrum
3 Spectrum range Visible light has 10000
times more
Having less spectrum
than VLC
4 cost Cheaper expensive
5 Network topology Point to point Point to point
6 Operating frequency Hundreds of Tera Hz 2.4 GHz
How Li-fi is different??
Li-fi technology is based on the LED’s for the transfer of data.
The light can belong to any part of the spectrum, irrespective
of the regions
Also, the speed of the internet is incredibly high and you can
download movies, music, games in just few minutes
You no more need to be in a region that is Wi-Fi enable to
have access to the internet
Advantages of Li-fi
It is possible to achieve more than 10 GB/s
Mostly powered by LED’s so it is cost efficient
Transmission of data is fast and easy
Its main advantage is it’s band with is 10000 times
than the radio waves
Applications of Li-fi
Cheaper than Wi-Fi, since visible light spectrum
is a visible light spectrum
No licence needed
Thousands and millions of street lights can be
converted in to Li-fi spots
CONCLUSION
The possibilities are numerous and can
be explored further. If this technology
can be put into practical use, every bulb
can be used something like a Wi-Fi
hotspots to transmit wireless data
Thank you
ANY QUERIES……..

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LIFI TECHNOLOGY

  • 2. OBJECTIVES What is Li fi?? Construction of Li fi??? Working of Li fi!!! Comparison between Wi-Fi and Li-fi How Li-fi is different?? Applications of Li-fi….. Advantages of Li-fi……. Conclusion……
  • 3. What is Li-fi???? Li-fi stands for LIGHT FIDELITY Li-fi is transmission of data through illumination sending data through a LED light bulb that varies in intensity faster than the human eye can follow
  • 4. Construction of Li-fi?? The Li-fi product consists of 4 primary sub-assemblies:  Bulb  RF Power Amplifier Circuit(PA)  Printed Circuit Board(PCB)  Enclosure
  • 5. Working of Li-fi!!!! Its working is much simply explained as follows:  If the LED is on, the digital “1” is transmitted.  And it is off, the digital “0” is transmitted.  It is possible to encode data in the light by varying the rate at which the LED’s flicker on and off to give different strings of 1s and 0s
  • 6. Comparison between Wi-Fi and Li-fi s.no parameter Li-fi Wi-Fi 1 SPEED >1 GB/s Around 150Mb/s 2 Medium of data transfer Use light as carrier Use radio spectrum 3 Spectrum range Visible light has 10000 times more Having less spectrum than VLC 4 cost Cheaper expensive 5 Network topology Point to point Point to point 6 Operating frequency Hundreds of Tera Hz 2.4 GHz
  • 7. How Li-fi is different?? Li-fi technology is based on the LED’s for the transfer of data. The light can belong to any part of the spectrum, irrespective of the regions Also, the speed of the internet is incredibly high and you can download movies, music, games in just few minutes You no more need to be in a region that is Wi-Fi enable to have access to the internet
  • 8. Advantages of Li-fi It is possible to achieve more than 10 GB/s Mostly powered by LED’s so it is cost efficient Transmission of data is fast and easy Its main advantage is it’s band with is 10000 times than the radio waves
  • 9. Applications of Li-fi Cheaper than Wi-Fi, since visible light spectrum is a visible light spectrum No licence needed Thousands and millions of street lights can be converted in to Li-fi spots
  • 10. CONCLUSION The possibilities are numerous and can be explored further. If this technology can be put into practical use, every bulb can be used something like a Wi-Fi hotspots to transmit wireless data