The document discusses Li-Fi technology, which uses visible light communication to transmit data wirelessly. It provides advantages over Wi-Fi such as higher speed, more secure transmission limited by the range of light, and ability to be integrated into existing lighting infrastructure more cheaply. The document outlines how Li-Fi works, its components, advantages, disadvantages, and potential applications. It concludes that Li-Fi could provide a cleaner, greener and safer wireless alternative to overcome radio spectrum limitations if further developed and integrated into mobile devices and lighting.

1. An Autonomous college of University of Mysuru, Re-Accredited by NAAC with ‘A’ Grade
Recognised by UGC as college with potential for Excellence
Ooty Road, Mysuru-570025, Karnataka, India
SEMINAR TOPIC: LI-FI TECHNOLOGY
Presented by:
Name: BHAVYA G
Reg No: JPC21007
Under Guidance of:
Dr . SOWMYASRI MADAM
HOD
Department of Computer
Application

2. • Introduction
• Disadvantages of Wi-Fi
• What is Li-Fi Technology
• How does Li-Fi Works
• Li-Fi Dongle
• Features of Li-Fi Technology
• Advantages of Li-Fi Technology
• Disadvantages of Li-Fi Technology
• Applications of Li-Fi Technology
• Real Demonstration of Li-Fi Technology
• Future Scope of Li-Fi Technology
• Conclusions

3. • In this century access to internet is absolutely
fundamental to life in developed countries.
• Speedy internet connection gives us access to news,
information, public services, families and friends etc..
• Internet is very essential thing right now, but good
bandwidth connection are not enough.
• We use wi-fi to use the internet for different purposes, so
wi-fi is very essential in our daily life.

4. • Security
• Range
• Bandwidth
• Health

5. • Li-Fi (Light Fidelity) is a bidirectional wireless system that transmits
data via LED or infrared light.
• Unlike Wi-Fi, which uses radio frequency, Li-Fi technology only
needs a light source with a chip to transmit an internet signal
through light waves.
• This is an extraordinary advance over today's wireless networks. Li-
Fi multiplies the speed and bandwidth of wi-fi, 3G and 4G.
• Li-Fi is a wireless technology as it uses Visible Light
Communication or infrared or even near ultraviolet spectrum.
• This technology carries the information by modulating light signals
around 400-700 nanometers.

8. • To receive the incoming data at the receiver side we require
the Li-Fi Dongle which consists of a Photo Receiver as well as
a higher transmitter.
• Now this Infrared Transmitter can be used to transmit the
uplink data back with LED source.
• Li-fi Dongle consists of an access point that connects to any
LED light that helps to create a Li-Fi network.
• Using any USB enabled mobile devices, we can able to
operate the dongle which has the size of business card.
• It uses Visible Light Spectrum instead of radio frequencies to
enable high-speed wireless data communication and Internet
access

9. • Data Density
• Safe Technology
• Low Cost
• High Speed Data
• Required no additional Power
• Works with Water Environment
• Hacking is negligible

10. • Quicker Data Transmission than Wi-Fi:
• An essential purpose of Li-Fi innovation is that it has a quicker information transmission rate
than Wi-Fi.
• Noticeable light range has a transmission capacity that is multiple times bigger than whole radio
wave and microwave range.
• Wi-Fi networks send information at around 20 megabits for each second, But Li-Fi send the
information at around 224 Gigabits per Second.
• Simple and Inexpensive to Deploy :
• Li-Fi innovation focus on the utilization of LED lights.
• This implies that a Li-Fi organization can be incorporated effectively with existing LED lighting
frameworks.
• Basically, any place there is a light source, there can be access to the Internet.
• Investigators foresee that Li-Fi organization would be multiple times less expensive than Wi-Fi.
• Security Due to the Limitations of Light:
• The signs transmitted by a Li-Fi item and information it communicates stay limited to a shut
territory.
• This implies that Li-Fi innovation offers an additional layer of security than Wi-Fi.
• Safe From Electromagnetic Intervention
• Wi-Fi uses radio frequency technology in order to provide network connectivity whereas Li-Fi
uses the Visible Light Spectrum.

11.  Li-Fi doesn’t work in the dark .
 Li-Fi has a big drawback compared to Wi-Fi, unlike Wi-F we
cannot move to other rooms unless there are wired bulbs too.
 Light can’t pass through the objects.
 Interference from external sources like sun light, normal bulbs,
and opaque materials in the path of transmission will course
interruption in the communication.
 High installation cost of the VLC systems.
 A major challenge facing Li-Fi is how the receiving device will
transmit back to transmitter.

12. • Li-Fi and Live Streaming
• Li-Fi in Hospitals
• Li-Fi in the Workplace
• Li-Fi in Schools
• Li-Fi and Industry 4.0
• Li-Fi and Augmented Reality (AR)
• Li-Fi and underwater applications

14. • With the ever-growing demand for connectivity, Li-Fi
would be able to combine illumination and wireless data
transmission to accelerate the relay of data across the
globe.
• It can be considered as incredible companion of wi-fi
technology.
• In future, Li-Fi base Integrated Chips will be integrated
with mobile and LED lightning to access high-speed
internet

15. • Overcomes the limitations of radio spectrum.
• 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.
• we will proceed toward the cleaner, greener, safer and brighter future.
• This may solve issues such as the shortage of radio-frequency bandwidth.
• Allows internet where traditional radio based wireless isn’t allowed such as
aircraft or hospitals
• LI-FI is enabled by advance digital transmission technologies