Li fi technology paper presentation, Li- Fi, VLC, Visible light communication, photo detector, amplification and processing,

LI – FI TECHNOLOGY

Presented By

Sirod Kumar

Jaipur National University

LI- FI means – LIGHT FIDELITY

LI- FI is transmission of data

through illumination,sending

data through a led bulb that

varies in intensity faster than

human eye can follow.

Very simply, if the LED

is on, you transmit a

digital 1, if it's off you

transmit a digital 0.

They can be switched

on and off very quickly,

which gives an easy way

Of transmitting data.

The LI-FI product consists of 4 primary

sub-assemblies:

Bulb

RF power amplifier circuit (PA)

Printed circuit board (PCB)

Enclosure

In RF driver

PA is used to convert electrical energy into RF Power.

PA is desgined for ruggedness and efficiency.

PA also contains control circuit for digital and

analog lightning.

Led bulb work as a projector of data.

ENCLOSURE

PA

LED

PCB

LED

An RF (radio-frequency) signal is generated by the solid-state PA and is guided into

an electric field about the bulb.

The led is embeded with dielectric material.

The work of dielectric material – guide RF energy and focus it to the bulb’s centre.

The high concentration of energy in the electric field vaporizes the contents of the

bulb to a plasma state at the bulb’s center.

This controlled plasma generates an intense source of light.

is not used so far

Which is not used so far

Safe to use

Larger bandwidth safe to

use

larger badwidth

Advantages:-

Large bandwidth

High secuirity

Fast data transfer

Reliable

Harmlessness (free from radio wave)

Low cost

Challenging problems:-

Presence of light is essential

There should be line of sight

Works better with fluorescent light &

led but very low efficiency with bulbs

shadowing

Where other transmission or

frequencies could be hazardous:-

* Used in petrolium or chemical

plants

* Used in aircrafts

* Used in medical areas

* Used in seminar-hall, home,office

* Used in street lamp as open hotspot

Wi-fi

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 toward the cleaner,

greener, safer( from radio waves), and brighter

future.

This technology in which LED is

working like a WI-FI hotspot to

transmit wireless data ,moves

toward the cleaner, greener,

safer( from radio waves) and

brighter future.

Thanks

and

Any Queries