It's a new technology it may be available in future. It is introduced by Mr. Harald Haas a German scientist professor at Edingburg University. In this technology we use light as wireless communication device for more information see it in TED Global talk by mr. Harald haas.

1. Li-Fi Technology

2. What Is Li-Fi?
 LI-FI is transmission of data through illumination, sending
data through a LED light bulb that varies in intensity faster
than human eye can follow
-German physicist, DR. Harald Haas

3. Genesis Of Li-Fi
Harald Haas, a professor at
the University of Edinburgh who began
his research in the field in 2004, gave a
debut demonstration of what he called
a Li-Fi prototype at the TED Global
conference in Edinburgh on 12th July
2011. He used a table lamp with an
LED bulb to transmit a video of
blooming flowers that was then
projected onto a screen behind him.
During the event he periodically
blocked the light from lamp to prove
that the lamp was indeed the source of
incoming data. At TEDGlobal, Has
demonstrated a data rate of
transmission of around 10Mbps. Two
months later he achieved 123Mbps.

4. Present Scenario
1.4 Million 5 Billion

5. Present Scenario
Radio Spectrum is congested but the demand for wireless data
double each year .Every thing, it seems want to use wireless
data but the capacity is drying up.
So what can carry this excess demand in the future.
Drawbacks - Capacity, Availability, Security & Efficiency.

6. Why Only Vlc
 Gama rays cant be used as they could be dangerous.
 X-rays have similar health issues.
 Ultraviolet light is good for place without people, but other
wise dangerous for the human body.
 Infrared, due to eye safety regulation, can only be used with
low power.

7. Bandwidth comparison

8. How Li-Fi Works ?
• If the led is on, you transmit a digital 1, if its off you transmit a 0.

9. Working process

10. Difference Between The Technologies

11. Advantages
Capacity
Availability
Efficiency
High Security
Easy To Use
Fast Data Transfer
Harmlessness
Low-cost

12. Where we use in real world
Aero planes
Remote operated vehicles in
sea
Petro chemical plants Traffic control

13. Concussion
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 hotspot to transmit wireless data and
we will proceed toward the cleaner, greener, safer and brighter
future.

14. Thank You