CEA-Leti announces a throughput world record 5.1 to 7.7 Gbps in (VLC) using a single GaN blue micro- light-emitting diode (LED)

CEA-Leti announces a throughput world record 5.1 to 7.7 Gbps in VLC using a single GaN blue micro- light-emitting diode (LED)

CEA-Leti Announcement

A few weeks ago, CEA-Leti, a Grenoble, France-based research institute for electronics and information technologies and one of the world's largest organizations for applied research in microelectronics and nanotechnology, made the announcement of the throughput world record of 5.1 Gbps in visible light communications (VLC) using a single GaN blue micro- light-emitting diode (LED).

Their data transmission rate of 7.7 Gbps achieved with a 10 µm microLED marks another step toward commercialisation and widespread use of LiFi communication.

Benoit Miscopein, a CEA-Leti research scientist, stated that Li Fi technology has exciting potential for mass-market applications. He further stated: "Multi-LED systems could replace WiFi, but wide-scale adoption will require a standardization process to ensure the systems' interoperability between different manufacturers. The Light Communications Alliance was created in 2019 to encourage the industry to implement this standardization.

CEA-Leti MicroLED Li Fi system

CEA-Leti said that: “In addition to a stand-alone WiFi-like standard, the possibility to include this new technology as a component carrier in the downlink of 5G-NR, a radio-access technology for 5G mobile considerations, is also under investigation to bring a large additional license-free bandwidth. This may be feasible because CEA-Leti's LiFi physical layer relies on the same concepts as WiFi and 5G technologies," said Miscopein. "Matrices of thousands of microLEDs could also open the way to mid- to long-range applications, such as indoor wireless multiple access.”

To preserve the bandwidth of each microLED within a matrix, it requires that each signal is generated as close as possible to the micro-optical source. CEA-Leti said: o meet this challenge, we expect to hybridise the microLED matrix onto another matrix of CMOS drivers: one simple CMOS driver will pilot one microLED," Miscopein said. "This will also enable the additional feature of piloting each microLED pixel independently, and that allows new types of digital-to-optical waveforms that could eliminate the need for digital-to-analog converters commonly used in the conventional 'analogue' implementations of LiFi.

Source: http://www.leti-cea.com/cea-tech/leti/english/Pages/What%27s-On/Press%20release/CEA-Leti-Researchers-Break-Throughput-Record-for-LiFi-Communications-Using-Single-GaN-Blue-Micro-Light-Emitting-Diode.aspx

What is Li Fi?

Li-Fi, also known as "Light Fidelity" is a wireless optical networking technology, which uses light-emitting diodes (LEDs) to transmit data. In 2011, professor Harald Haas made a Li-Fi demonstration at the TED (Technology, Entertainment, Design) Global Talk on Visible Light Communication (VLC). Below is a video demonstration of Li-Fi technology by professor Harald Haas:

VLC uses light as a medium to deliver high-speed communication like Wi-Fi and complies with the IEEE standard IEEE 802.15.7. The IEEE 802.15.7 is a high-speed, bidirectional, and fully networked wireless communication technology-based standard similar to Wi-Fi's IEEE 802.11.

How does Li-Fi work?

Li-Fi is a high speed, bidirectional, and fully networked wireless communication of data using light. Li-Fi constitutes of several light bulbs that form a wireless network.

When an electrical current goes through to a LED light bulb, a stream of light (photons) emits from the lamp. LED bulbs are semiconductor devices, which means that the brightness of the light flowing through them can change at extremely high speeds. The signal is sent by modulating the light at different rates. The signal can then be received by a detector which interprets the changes in light intensity (the signal) as data. Also when the LED is ON, you transmit a digital 1, and when it is OFF, you transmit a 0.

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OWNII Coin (Li Fi Cryptocurrency) - Launch Update

OWNII Coin (Li Fi Cryptocurrency) - Launch Update

A while back, we wrote an article about a Li-Fi cryptocurrency called “OWNII Coin”. Global Greenology, a privately owned global manufacturing and design company specialising in environmentally friendly, energy-efficient building solutions, developed a cryptocurrency for Li-Fi implementation.

What are cryptocurrencies?

Cryptocurrencies are virtual or digital currencies that have no centralised regulating authority. This means that money is produced and transferred without the intermediation of banks. Cryptography is used as a means of ensuring transaction security.

Bitcoin, created in 2009, was the first decentralised cryptocurrency and remains the most expensive virtual currency worldwide. Other popular cryptocurrencies include: Bitcoin Cash, Ethereum, Dash, Mixin, Litecoin, Zcash, Bitcoin SV and Monero. The cryptocurrency used in the most transactions daily was Ethereum in 2019.

The decentralised control of each cryptocurrency works through Blockchain, a public transaction database that functions as a distributed ledger. The size of Bitcoin Blockchain grows from year to year and it mounted to around 242 gigabytes as of the third quarter of 2019.

The prices of cryptocurrencies are quite unstable and strongly dependent on the market sentiment. The price of Bitcoin, for example, experienced an increase from about 371 U.S. dollars in January 2016 to a peak of over 13 thousand by December 2017. Also, market capitalisation of Bitcoin experienced a rapid growth in that time period.

What is OWNII Coin?

OWNII stands for Optical Wireless Network Internet Infrastructure. OWNII Coin is developed to oversee, develop, and design the physical infrastructure necessary to implement Li-Fi in the United States and developing nations abroad and is sold privately. The pureLiFi company has manufactures and distributes the equipment needed to stream communication through existing LED bulbs but to implement Li-Fi , installation of this equipment is necessary.

Global Greenology, creator of OWNII Coin, states that the OWNII Coin will promote the creation of a new internet infrastructure in the United States and worldwide. It will also create numerous opportunities for employment, business ownership, and entrepreneurial endeavours selling equipment and services. The multiple streams of revenue that OWNII Coin represents brings unprecedented value. Once launched, the infrastructure creates new technology, software, products and services making this coin and ecosystem very valuable.

OWNII coin and the resulting financial capital it generates allows Global Greenology the opportunity to build the OWNII Ecosystem and effectively provide the technology to reach the end user and provide opportunities for manufacturing of the Li-Fi light bulbs and connection devices. It opens a level playing field for the smaller business owner or an entrepreneurial start-up company to get involved on the ground floor of this opportunity.

OWNII creates wireless communication, that is faster, addresses issues with internet security, allows localisation due to small coverage area of Li-Fi access points used for precise asset tracking. Furthermore, providing ubiquitous high-speed wireless access that offers substantially greater data density (data rate per unit area) than RF through high bandwidth reuse.

Finally, the OWNII Coin system exploits the advantages of cryptocurrencies over fiat currencies as a medium of exchange. In particular, it does not require any single agent or institution be trusted to keep an honest ledger, provide low transactions costs, or offer increased security to customers. The technical elements and infrastructure needed to implement the OWNII Coin system is already established and ready for execution, the only real challenge is the dissemination. Global Greenology’s establishment of the OWNII Coin system has the potential to disrupt our current expensive wireless communication system.

The primary benefits of Li Fi are as follows:

• Security: Provides entirely secure access. Where there is no light there is no data.

• Safety: Does not produce electromagnetic radiation and does not interfere with existing electronic systems.

• Localisation: Allows localisation due to small coverage area of Li-Fi access point - localisation can be used for very precise asset tracking.

• Data density: Provides ubiquitous high-speed wireless access that offers substantially greater data density (data rate per unit area) than RF through high bandwidth reuse.

Launch Update

Due to the current Corona virus pandemic, the public launch is being delayed. However, Global Greenology is currently planning the launch of OWNII Coin in 2 phases. The first phase being a private sell of the token in which you can pledge to purchase your amount but will not have to pay for it until the market stabilised. The second phase will be a public purchase just before going live on the exchange. A website specifically for the OWNII coin is also being developed by Global Greenology. Li Fi Tech News will keep you updated on the progress of the OWNII Coin.

In conclusion, if you are interested to hear more information about the OWNII Coin or investing in it, you can contact through our chatbot or send an email through our contact us form. If you enjoyed this post and would like to hear more updates about Li-Fi technology, subscribe to our newsletter. Don’t forget to subscribe on our social media accounts. You can also join on our Telegram group about Li Fi technology on this link:

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Li-Fi Rewind 2019

Li-Fi Rewind 2019

2019 was yet again a year of great developments and advancements for the Li-Fi industry. The technology is getting cheaper and better every year. The following timeline displays the main events that took place in regards to Li-Fi.

LiFiMAX - The 100 Mbps Li-Fi system

JAN 2019

Oledcomm announced their 2nd generation Li-Fi system called “LiFiMAX”. The latter will offer a connection ranging from 40 Mbps to 100 Mbps, over a radius of 28 m², and allowing up to 16 people to connect simultaneously.

Infinity LiFi X

JAN 2019

Infinity Technology Services Ltd claimed that their latest Li-Fi product is the most powerful plug and play system available for Li-Fi communication. They claimed that it can transmit data up-to 150 Gbps and allows up to 100 simultaneous users to benefit from a secure connection.

Gigabit LiFi

FEB 2019

The Gigabit LiFi system is capable of transmitting data of up to 1 Gbps. From the pictures below, the Gigabit LiFi laptop achieved a download line rate of around 975 Mbps and an upload line rate of 377 Mbps.

The Institute of Physics

MAY 2019

The Institute of Physics (IOP) opened an accelerator centre equipped with Li-Fi equipment in London. This was in partnership with the UK Leading Li-Fi company, pureliFi.

Air France LiFi Project

JUN 2019

Antoine Laborde, Air France Innovation Manager, added: " We are very pleased to have the opportunity to experience the Li-Fi on one of our aircraft, and to organise an on-board video games tournament, two major" world premieres ".

Trulifi

JUN 2019

Signify recently launched a new Li-Fi system called “Trulifi”. The new Li-Fi system comprises of a USB Network Access adapter, Li-Fi enabled LED lights and a Trulifi-6002 Plug-In Optical Transceiver. The Trulifi-enabled luminaires can provide wireless connectivity at speeds up to 150 Megabits per second (Mbps) over large spaces, such as meeting rooms and office floors.

5G RuralFirst

AUG 2019

5G RuralFirst has successfully trialled Li-Fi technology in the Orkney Islands. The first stage of the project is the creation of rural test-beds and trials for 5G wireless and mobile connectivity across the three main sites in the Orkney islands, Somerset and Shropshire.

Latécoère, Signify, and Huneed Technologies

OCT 2019

Latécoère, Signify, and Huneed Technologies Announce Strategic Partnership on Li-Fi Implementation in Commercial Aircraft.

pureLiFi

NOV 2019

pureLiFi just announced successful fundraising of $18 million (£14 million). The funding round includes Temasek, an investment company headquartered in Singapore, and the Scottish Investment Bank. The investment will permit the company to further develop miniaturised LiFi components and make them available in mobile devices.

LiFi-multicell

DEC 2019

CEA-Leti announced the demonstration of its LiFi-Multicell system for the CES 2020. LiFi-multicell system is the first-ever smart interference orchestrator that automatically detects interference between lighting zones in networks and optimizes data transmission rates for each nearby device. The CEA-Leti technology is able to provide data-transmission rates up to 150 Mb/s over distances up to three meters by LED.

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Latécoère, Signify and Huneed Technologies Announce Strategic Partnership on Li-Fi Implementation in Commercial Aircraft

Latécoère, Signify, and Huneed Technologies Announce Strategic Partnership on Li-Fi Implementation in Commercial Aircraft

Latécoère

Latécoère, the partner of "Tier 1" of major international aircraft manufacturers, is pleased to announce the transition to the industrialisation of its Li-Fi technology, through a memorandum of agreement signed with Signify.

" The Paris Air Show 2019 allowed Latécoère to show the power and speed of Li-Fi. Our technology, which illustrates our leading position in terms of innovation, has raised high expectations from the market and is now ready to take the next step, says Yannick Assouad, CEO of Latécoère.  Signify and Huneed Technologies will open new horizons and new opportunities to Li-Fi, that its use is widespread in aircraft cabins. "

The Li-Fi technology allows a connectivity experience onboard a higher aircraft in terms of bandwidth, latency and stability. Another advantage of Li-Fi is that it does not interfere with sensitive equipment and that the connection is not affected by the movements of the aircraft. Li-Fi also reduces cabling and, coupled with an infrastructure upgrade to low-weight fibre optic solutions, will reduce the weight and fuel consumption of the plane.

Increasing the power of Li-Fi with the Trulifi system developed by Signify

Signify launched its Trulifi systems earlier this year and has installed around 100 projects worldwide. The Trulifi combines energy-efficient LED lighting with reliable, secure and high-speed wireless bi-directional connection, with speeds of up to 250 Mbps for the downlink and uplink.

" Through this partnership, Signify, and Latécoère will transform the passenger cabin experience by providing them with the latest connectivity technology," said Olivia Qiu, Director of Innovation at Signify. The Trulifi has enormous potential, and our ambition is, in addition to aircraft, to also provide this technology to other forms of public transport, so that users have access to a reliable, secure and fast Internet connection, wherever they are."  

As a first step, Trulifi will be used to connect the media players of the headrests. In a second phase, the Li-Fi will allow passengers to connect their devices to embedded media and the Internet, but also to interact with each other and to have the same connectivity experience onboard is on the ground.

Start of the industrialisation phase with Huneed Technologies

Huneed Technologies, a South Korean expert on tactical communications equipment and aerospace, became the third partner in the industrialisation of ' Li-Fi infrastructure in rooms Latécoère. The group will jointly develop with Latécoère for the development and production of the passenger distribution unit and the fibre optic router.

" We are thrilled to be recognised by Latécoère for our expertise in communication technology and knowledge production in the context of this innovative partnership," said Eugene Kim, President of ' Huneed Technologies. This opportunity is a perfect fit with our growth strategy to globally expand our business in the aerospace to ' commercial aviation. Huneed will supply Li-F's electronics and data communications software to enable widespread adoption of this technology, which will play a critical role in the next generation of smart booths to deliver the best possible passenger experience. "

About Latécoère 

Latécoère is a Tier 1 partner of major international aircraft manufacturers (Airbus, Embraer, Dassault, Boeing and Bombardier), in all segments of the aeronautical market (commercial, regional, business and military aircraft), in two areas:

• Aerostructures (58% of total turnover): fuselage sections and doors.          

• Interconnect systems (42% of total revenue): embedded cabling, bundles electric and avionics bays.

As of December 31, 2018, Latécoère employed 4,958 people in 13 different countries. Latécoère, a public limited company with a capital of 189,637,036 euros divided into 94,818,518 shares with a par value of 2 euros, is listed on Euronext Paris - compartment B. ISIN codes: FR000000032278 - Reuters: LAEP.PA - Bloomberg: LAT. FP

About Signify 

Signify (Euronext: LIGHT) is the world leader in lighting for professionals and individuals and lighting for the Internet of Things. Our Philips products, Interact connected lighting systems and data-driven services deliver business value and transform lives in homes, buildings and public spaces. With a turnover of 6.4 billion euros in 2018, we have around 27,000 employees and are present in more than 70 countries. We unlock the extraordinary potential of light for brighter lives and a better world.

About Huneed

Huneed Technologies, a long-time developer and manufacturer of tactical wireless communications systems for the South Korean military, is now ready to manufacture avionics hardware and become a global provider of maintenance, repair and overhaul services.

Over the last ten years, Huneed Technologies has gone from being a company to becoming a leading global supplier to Boeing Defense and Space. Prestigious achievements, including the Boeing Performance Excellence Award 2016 and a Boeing Supplier of the Year nomination, punctuated Huneed's reputation as a trusted global aviation supplier.

Huneed's strategic and measured growth in the aerospace market has allowed it to become the partner of choice for some of the world's largest aerospace companies.

Conclusion

Li-Fi will allow passengers to access a much higher level of bandwidth than the one currently provided by Wi-Fi. Passengers will access faster internet connection, download and stream content at the comfort of their seats.

Professor Haas said: “This technology is perfect for planes as it doesn’t interfere with radio signals in the same way as Wi-Fi, which uses radio waves. Instead, Li-Fi takes advantage of visible light.”

“Li-Fi is a game-changer for three reasons. First, it solves a ‘congestion’ issue. In the data-driven world that we live in, we are running out of radio spectrum. This is a problem in crowded places like airports and aircraft interiors as it means that the current available bandwidth does not support the hundreds of people wishing to use data-intensive applications and the internet in the same place at the same time. Li-Fi solves this issue by using 1,000 times the bandwidth compared with the entire radio frequency spectrum. This is additional free, unregulated bandwidth in the visible light spectrum.

“Second, it paves the way for local-area networks to be established, which means that passengers can make calls, use the internet and access in-flight entertainment systems more easily.

“Third, in a world fast being dominated by big data, safeguarding information is paramount. In the cabin, although Li-Fi signals can leak through windows, the technology offers greater protection to passengers than a Wi-Fi connection. But the biggest gains will be experienced by OEMs. Their manufacturing halls often have lots of LED lighting and few windows, which will enhance data security in their facilities.”

The Institute of Physics (IOP) Launches new Accelerator Centre with Li-Fi Technology

The Institute of Physics (IOP) Launches new Accelerator Centre with Li-Fi Technology

The Institute of Physics

The Institute of Physics, also known as IOP, is a scientific charity that works for the advancement of physics education, research and application. It was established in 1874 and has a worldwide membership of over 50,000. The IOP supports physics in education, research and industry.  The IOP provides services to its members including careers advice and professional development and grants the professional qualification of Chartered Physicist (CPhys), as well as Chartered Engineer (CEng) as a nominated body of the Engineering Council.  The IOP's publishing company, IOP Publishing, publishes more than 70 academic journals and magazines.

The IOP opens an accelerator centre equipped with Li-Fi equipment in London near Caledonian Road.  Li-Fi, also known as "Light Fidelity" is a wireless optical networking technology, which uses light emitting diodes (LEDs) to transmit data.  In 2011, professor Harald Haas made a Li-Fi demonstration at the TED (Technology, Entertainment, Design) Conference.

 Li-Fi is a high speed, bidirectional, and fully networked wireless communication of data using light. Li-Fi is made of several light bulbs that form a wireless network. In simple words, Li-Fi is the internet through Light. You can watch the video below to see how Li-Fi works.

The IOP's head of science and innovation, Anne Crean stated that the technology was a potential game-changer moving forward.

 She further stated: "We're all so connected now using the internet and downstreaming videos that there's going to be a big data crunch soon and not enough bandwidth for Wi-Fi to work (known as the spectrum crunch).

 "That's why we're moving out into different frequencies such as light.

 "In the future you could be in an office and you wouldn't need a router - it would all be built into the lighting system and you would communicate from the lights.

 "It's an exciting, disruptive technology that might impact on business and the public for years to come."

 "Security-wise you can't tap into it," added Anne. "Wi-Fi leaks through the wall because it uses radio frequency but light doesn't - it's very much a bi-directional communication so secret spies can't tap in!"

The IOP sees the new Accelerator centre as another platform to develop its ties with the Islington community.  It already partners with local schools and desires to grow the industry's employment opportunities in the borough. 

Anne said: "It's here to help entrepreneurs, start-ups and middle-sized organisations come together, network, collaborate and share intelligence. 

"It can help them access funding or for instance put them in touch with someone knowledgeable about bank loans, or perhaps even develop a partnership with the local university.

"The idea is that an organisation's growth will be even greater at the centre because they'll benefit from all the institute's networks."

IOP Li-Fi Launch with pureLiFi

On Thursday 16th May 2019, the International Day of Light, the IOP and pureLiFi will unveil the cutting edge Li-Fi technology in the IOP’s new Accelerator Centre.

This is the first in a series of physics innovation talks being introduced at the IOP aimed at researchers in the field, potential users, as well as inspiring innovators taking tech to market. The inaugural physics innovation talk will be done by Professor Harald Haas from the University of Edinburgh, co-founder of pureLiFi, the leaders in Li-Fi technology, and one of the IOP’s 2017 Business Award winners.

Professor Haas will speak about the journey of building a technology company in the UK starting from a few researchers in a lab to the growing scale-up it is today with more than 130 deployments across more than 24 countries. Haas will speak about the fundamental advantages of Li-Fi. He will illustrate a vision for Li-Fi and how this revolutionary light communications technology will transform the way the world connects and how it will enable other disruptive technologies and applications. Haas will share a few case studies of where Li-Fi is making a difference for industries and communities today.

pureLiFi is a pioneering Li-Fi company engaged in the research and development of Li-Fi and visible light communication technologies.  pureLiFi seeks to resolve the global struggle for diminishing wireless capacity resulting in the Spectrum Crunch. The company is currently developing and delivering technology for secure, reliable, high-speed communication networks that seamlessly integrate data and lighting utility infrastructures and significantly reduce energy consumption.

Photo credit to pureLiFi

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Li-Fi Misconceptions

12 Misconceptions of Li-Fi

"The trouble with the world is not that people know too little; it's that they know so many things that just aren't so."

Welcome to the official blog of Li-Fi Tech News.

Today's article will be about the common misconceptions of Li-Fi technology that you may or may not have heard. But first, what is Li-Fi?

Li-Fi, also known as "Light Fidelity" is a wireless optical networking technology, which uses light emitting diodes (LEDs) to transmit data.  In 2011, professor Harald Haas made a Li-Fi demonstration at the TED (Technology, Entertainment, Design) Conference.

LiFi is a high speed, bidirectional, and fully networked wireless communication of data using light. Li-Fi is made of several light bulbs that form a wireless network. In simple words, Li-Fi is the internet through Light. Watch the video below to see how Li-Fi works.

Here is a list of 12 Misconceptions of Li-Fi technology.

1- It interferes with radio frequency

Radio Frequency Technology like Wi-Fi can be disturbed by a variety of devices such as smartphones, cordless phones, microwaves and other Wi-Fi networks.  Li-Fi uses the visible light spectrum, which operates at a higher frequency than the Radio Waves spectrum and hence does not interfere with Wi-Fi. Because of this, Li-Fi can be used in hospitals, air planes and power plants without the fear of interference from radio frequency devices.

2 – It is less secure than Wi-Fi and Bluetooth

 In contrast to Wi-Fi, light does not go through walls and can easily be contained in a physical space.  This gives the opportunity of creating secure ad-hoc networks in meeting rooms which can allow participants to share data without the risk of data leaking out.  Some designated rooms can be used as high-security areas with their own Li-Fi networks, isolating them from other areas of the building where there might be connection of vulnerable Internet of Things (IoT) devices.

PureLiFi is currently developing the security components and technologies that will help security specialists and consultants deliver more secure wireless communications.

3 – It will never be made affordable to the average consumer

Again, this is another misconception. Although, the Li Fi products can be very expensive ranging from £2500 to £5000, in terms of cost, a number of companies are working towards the miniaturisation of Li-Fi products to make it affordable for everyone and not just businesses.

4 – Just like Wi-Fi, Li-Fi will function in our pockets

Well, unless your clothes allow light to pass through them, Li-Fi will not work if a Li-Fi enabled device is in your pocket.  The Li-Fi receiver on the device must be exposed to a Li-Fi ready LED light.

5 – Li-Fi is truly a disruptive technology

Hold on, let us first look up the definition of disruptive technology”. A disruptive technology is defined as a technology displacing an established technology shaking up an entire industry or ground-breaking product that creates a completely new industry.  Examples of disruptive technologies are Peer-to-Peer ride-sharing platforms like Uber and Lyft. Netflix, a subscription based streaming service, can also be considered a disruptive technology.  Li-Fi will work in conjunction with existing Wi-Fi networks to provide faster and more secure internet and data transmissions.  So, Li-Fi should not be considered a disruptive technology just yet.

6 – Li-Fi won’t work in the dark

It is true that any Li-Fi receiver would need switched on LED lights to receive data transmission.  This means Li-Fi technology cannot be used in dark rooms.  However, a possible solution to solve this problem is to dim LEDs low enough so that our eyes can’t see them. 

A team of researchers, from Dartmouth College in the United States, are currently working on a project to encode data into ultra-short and imperceptible light impulses.  The project is called “DarkLight”.

Check the video below:

You can also read an abstract from their paper here.

7 – There is currently only one company that is commercialising Li-Fi

It is true that pureLiFi was the first company that coined the term Li-Fi, where Professor Harald Haas performed a demonstration at the Global TED talk conference in July 2011.  This resulted in the formation of a number of new Li-Fi companies that are currently working towards the commercialisation of Li-Fi technology.

Oledcomm is a spin off from the University of Versailles based on research on Visible light communication that begun in 2005.

VLNComm is a leading company in Visible Light Communication (VLC) or so called Li-Fi Technology, which is an alternative data communication technique for wireless applications that uses optical energy to provide illumination and data transmission at the same time.

8- Li-Fi cannot work under sunlight

This is not the case. It is generally assumed by many people that Li-Fi cannot work under sunlight conditions. The use of optical filters will enable Li-Fi to work outdoors without  interference from any natural or artificial sources. These filters reduce receiver saturation. Analogue and digital filtering can also be used to minimise the level of interference.  PureLiFi stated that  Li-Fi relies on detecting the fast changes in light intensity and not on the absolute or slowly varying levels caused by natural disruptions in daylight or sunlight. Li-Fi Technology modulates the light at very high rates whilst the sunlight acts as a constant light source which can be filtered out at the receiver.

9 – The LED lights used to transmit data, have a very short lifespan

In contrast to incandescent light bulbs, LED light bulbs have a general lifespan of around 50,000 hours. In other words, if used for 12 hours a day, the LED light bulb will last at least 11 years. If used for 8 hours a day, the LED light bulb can last for 17 years.  As we can see, LED lights can have a very long lifespan.

10 – You can’t use Li-Fi in remote areas or in villages where living conditions are extremely poor and limited

Well, that is not the case. In April 2017 in a village located near Liberia, a company called  Li-Fi Led Côte d’Ivoire installed solar panels to provide permanent lighting to its residents. They also provided LED installation to the entire village. Through these LED light bulbs, the residents have access to the internet and television without any wire or Wi-Fi connection thanks to Li-Fi Technology. Li-Fi can operate in remote areas with the right equipment.  Watch the video below:

You can also read the article about this story here

11 – Li-Fi is not a bi-directional technology

According to the Merriam Webster dictionary, bi-directional means involving, moving or taking place in two opposite directions. Generally, a Li-Fi system is made of Trans-receivers where one receiver is at the SOURCE and the other one is at the DESTINATION.  When the light flickers, the Trans-receiver senses the changes at the Destination point through a photo diode which decrypts the data.

PureLiFi defines Li-Fi as a bi-directional wireless communications technology that allows high speed transmissions in both uplink and downlink simultaneously.

Picture from pureLiFi

12 - Li-Fi is strictly a line of sight technology

Line of sight can be defined as electromagnetic radiation or acoustic wave propagation travelling in a direct path from a source to a receiver. In simpler terms, it is electro-magnetic waves travelling in a straight line.  Because light  can bounce off of a surface, Li-Fi cannot be fully considered a line of sight technology.  With a direct line of sight, a very fast rate of communication can be achieved but when light bounces off of a wall and other objects, the rate of communication will be lowered. PureLiFi states that "Li-Fi is a cellular communication system and the data rate is not dependent on the line of sight but on the signal quality at the device. Signal quality can be defined by the ratio of the desired data vs any interfering data and noise."

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