Embed Size (px)
DESCRIPTION
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.
Citation preview
Li-Fi Technology
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
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.
Present Scenario
1.4 Million 5 Billion
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.
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.
Bandwidth comparison
How Li-Fi Works ?
• If the led is on, you transmit a digital 1, if its off you transmit a 0.
Working process
Difference Between The Technologies
Advantages
CapacityAvailabilityEfficiencyHigh Security
Easy To UseFast Data TransferHarmlessnessLow-cost
Where we use in real world
Aero planes Remote operated vehicles in sea
Petro chemical plants Traffic control
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.
Thank You
