New Device Could Drive MicroLED Displays, Li-Fi

A new device could make upcoming microLED displays easier to engineer and visible light communications systems, like LiFi LED, faster.

As IEEE Fellow Kei May Lau sees it, the problem with conventional LEDs, which are current controlled devices, is that turning them on and off rapidly to control brightness or using them for Li-Fi takes careful engineering and a bunch of circuitry.

“Most IC designers would rather work with voltage control device, but LEDs are current controlled devices,” says Lau. The combination of an LED’s high current and low voltage requirements makes designing drivers for them troublesome.

So she and her students invented a device, the HEMT-LED, that makes it much easier. The HEMT-LED, which is a bit like a light emitting transistor, lets you switch light emission on and off and control brightness with voltage signals.

The HEMT-LED, which is made from gallium nitride, integrates a high-electron mobility transistor (HEMT) and an LED so tightly that they merge into a single device.

Source Read More IEEESpectrum

Centre switches on superfast Internet pilot – Li-Fi in India

Imagine if the LED bulbs in your house could transmit high-speed data without WiFi or broadband. Or an LED-lit movie billboard that can relay high-quality promotional videos and songs to your smartphone as you pass by in a crowded mall? Well, these scenarios are not out of any sci-fi thriller — the government of India is already testing technology that can enable this and other features.

In a recent pilot project, the ministry of electronics and IT successfully tested a technology called LiFi (Light Fidelity), which uses LED bulbs and light spectrum to transmit data at speeds as high as 10 GB per second over a 1-km radius.

The pilot project was conducted in association with Indian Institute of Technology Madras at its campus along with lighting company Philips a few months ago. While the pilot was staged in a closed environment, ERNET now plans to test it in open spaces in partnership with Indian Institute of Science, Bengaluru.

What is LiFi

Read more at: Economictimes


Oledcomm introduced the first LiFi connected object in the world in CES

Oledcomm Corporation redefines the standards of connectivity and internet access with MyLiFi®. Winner of two CES Innovation Awards 2018 in the Tech for a Better World and Smart Cities categories, MyLiFi® is a LED lamp Lifi technology that revolutionizes internet by offering an ultra-fast, secure and radiowave-free connection.

LiFi (“Light Fidelity”) is a new technology that allows mobile devices (and other connected objects) to connect to each other by using LED lights. LiFi transmits data by modulating the light signals from an LED light bulb. Of course, this process is invisible to the human eye. Light signals are received and converted into data by a dongle connected to the device.

This revolutionary technology, created in 2005 by a team including Suat Topsu, President of Oledcomm, had been used for B2B purposes such as helping blind people navigate public transport systems, transmitting medical information in hospitals, and measuring travel times in supermarket aisles. But now LiFi technology is moving into homes and offices as a revolutionary new form of connectivity that is ultra-fast, secure, and that works without any radio waves.

Benjamin Azoulay, CEO of Oledcomm, says,”just as clean energies are displacing fossil fuels and propelling us towards a world of responsible innovation, light is now replacing radio waves to provide a safe, a people- and eco-friendly internet connection. MyLiFi® marks the start of a new era in connectivity. It’s the sense of history!”

Source Electronics360 Know More click here

Luminescent paint makes LiFi networks more secure

“Smart paint” containing fluorescent and phosphorescent pigments could extend the possibilities of proposed LiFi networks, report a team led by K S Narayan at the Jawaharlal Nehru Centre for Advanced Scientific Research in Bengaluru, India. The researchers analysed the effect of nearby luminescent surfaces on the noise characteristics of visible light communication system (VLC) signals, and found that secondary emission could limit bandwidth locally by overwhelming receivers. The residual glow from phosphors could even be modulated to transmit a signal after the primary LED source has been turned off.

Visible improvement

LiFi uses visible and near-visible light to connect electronic devices in much the same way as now nearly ubiquitous WiFi. Like its more familiar counterpart, LiFi technology is expected to play a role in connecting devices within the incipient internet of things. Unlike microwaves, however, visible-light signals cannot pass through walls, meaning that LiFi networks are, in principle, less vulnerable to eavesdropping from outside.

Know more visit

You could soon be surfing the web via lights

A inventor from Germany has claimed a major breakthrough in revolutionising how we access the internet.

Harald Haas is the man behind LIFI – a technology which allows internet data to be sent and received via LED lights.

His company, Pure LIFIhas recently released a USB dongle device that enables laptops and tablets to be connected to the burgeoning technology.

“I think it’s not a question of if, it’s a question of when,” Haas told Euronews. “LIFI is a necessity and it will come.

“This is dongle is a real breakthrough that allows us to engage larger scale projects. The pilots we have equipping a number of office environments but now we can equip a full floor of a hotel or an airport.”

How does it work?

Signals are sent via the light stream – at frequencies the human eye cannot detect – to sensors on your device and vice-versa.

But, how does the internet get into the light source?

Haas says there are two solutions and both involve sending data signals down the same cable as the light’s power source.

Who is Harold Hass Know more

The article is originally published at Euro News Read More


Global Wireless Fidelity (Wi-Fi) and Light Fidelity (Li-Fi) Market to Rise

Wireless Fidelity (Wi-Fi) and Light Fidelity Li-Fi technologies are more demanding in recent time. There are huge business opportunities available to help new players enter the market and to collaborate with big companies to provide various products and services. Particularly for Li-Fi technology, the new start-up market is coming up with advanced products, services and solutions in the market and is expected to double in the next 5 to 7 years. In this space, cooperation and mergers and acquisition laws are expected to continue.

To understand the networking environment, the report Wi-Fi and Li-Fi markets is underlined. The report speaks about the mode, products, services, components, circles and regions deployed for both Li-Fi and Wi-Fi. In the direction of adoption of main stakeholders in the next 5-7 years, information about major trends, drivers, investments, vertical player initiatives and government initiatives can be found. Furthermore, this report gives details of the major challenges that will affect market growth.

As per research report, the Wi-Fi and Li-Fi markets are estimated to witness a CAGR of 15.0% and 61.3%, respectively during the forecast period 2016–2022.

Read more:

This press release was orginally distributed by SBWire

Li-Fi Analysis on United States Market and Global Research in 2017

Li-Fi is the abbreviation of light fidelity and was expressed by Harald Hass who was a German physicist. In Li-Fi the information is transferred through light signals instead of radio waves and mostly Wi-Fi plays an efficient role for wireless information coverage within the buildings whereas by using Li-Fi we can provide the excel density data coverage in a particular area without any radio interference issue.

It furnishes well bandwidth, assurance than Wi-Fi and excels speed. In the coming generation, this technology will be used for transmitting data or information to smartphones, laptops etc. through the light in a room.Li-Fi or Light Fidelity refers to 5G Visible Light Communication systems using light-emitting diodes as a medium to high-speed communication in a similar manner as Wi-Fi.


Read More Source 

Lucibel brings Li-Fi Internet connectivity to French hospital

Lighting systems manufacturer Lucibel announced that it has completed its first deployment of ‘LiFi by Lucibel’ in a hospital environment, installing the service in the cardiology department of the Stell clinic in the town of Rueil-Malmaison (Ile de France region). The company said that Li-Fi Internet connectivity is particularly suited to areas within hospitals where the use of Wi-Fi is not recommended or forbidden, due to the risk of interference with medical equipment. The service also offers the additional benefit of providing hospital staff with a secure connection to access patient data.

Source – Telecom Paper

Wireless data from every light bulb by Harald Haas

What if every light bulb in the world could also transmit data? At TEDGlobal, Harald Haas demonstrates, for the first time, a device that could do exactly that. By flickering the light from a single LED, a change too quick for the human eye to detect, he can transmit far more data than a cellular tower — and do it in a way that’s more efficient, secure and widespread.

Who is Harold Haas?

Harald Haas is the pioneer behind a new technology that can communicate as well as illuminate

Read more about him Click here

Watch his Video below which is on Ted Talk . Article Excerpt from Ted Talk

Li-Fi The Internet Using LED Light Waves

Wi-Fi networks dependent on radio waves are growing more congested all the time—and can’t be used everywhere—so various researchers and companies are betting light waves from LED lamps and overheads can also stream data and connect people to the internet. So-called Li-Fi technology, which uses a much more abundant slice of the wireless spectrum, is also more energy-efficient than Wi-Fi, though for now people need a special USB drive to use it. Light waves can’t pass through walls like radio waves do, but that also makes the networks more secure. A group from the world’s largest technical association, IEEE, will have draft standards for Li-Fi ready by yearend for companies that want to commercialize the technology, says its chair man, Bob Heile.

1. Setup LEDs outfitted with Li-Fi technology can embed and stream data in the light they emit by modulating the light’s intensity faster than the human eye can detect.



2. Use A USB drive that serves as a receiver and transmitter picks up the signals from the LEDs and uploads data to them from a connected PC or mobile device.

3. Privacy Because light, unlike radio waves, can’t penetrate a wall, Li-Fi isn’t as all-purpose as Wi-Fi. But it’s more secure.


Innovators Harald Haas and Mostafa Afgani: co-founders (chief scientific officer; chief technology officer)

Founded 2012 Based Edinburgh

Funding £9 million ($11.4 million)

Background Haas, a professor at the University of Edinburgh, became a public face of Li-Fi research with a 2011 demo in a TED Talk. The lecture has been viewed online about 2.4 million times.

Status The 25-employee startup is testing its technology with customers including Cisco Systems and British Telecommunications. Afgani says it transmits data at up to 43 megabits per second. (The average U.S. broadband speed is about 16 Mbps, cloud-services company Akamai Technologies estimates.) PureLiFi has also partnered with French lightmaker Lucibel, which introduced its Li-Fi-equipped overhead lights in the fall and plans to unveil the next model by April.


Innovators Mohammad Noshad and Maite Brandt-Pearce: co-founders (chief technology officer; adviser)

Founded 2013 Based Charlottesville, Va.

Funding $1.6 million

Background University of Virginia professor Brandt-Pearce and former student Noshad, who recently completed a postdoc at Harvard, spun VLNComm out of their optical communications research.

Status Co-founder Fraidoon Hovaizi says their nine-person team, backed by the U.S. Department of Energy and the National Science Foundation, has been in funding and partnership talks with U.S. government agencies and companies including Lockheed Martin. Their latest overhead-light prototype is as fast as 25 Mbps; Brandt-Pearce says the next one will hit 100 Mbps given their advances in coding, modulation, and signal processing. VLNComm plans to bring a Li-Fi-capable desk lamp to market this year.


Innovators Deepak Solanki and Saurabh Garg: co-founders (chief executive officer; chief technology officer)

Founded 2012 Based Tartu, Estonia

Funding Declined to disclose

Background Hardware developer Solanki and software developer Garg started working on Velmenni in India. The 11-person team has created a credit-card-size prototype router capable of converting off-the-shelf LED lights into Li-Fi transmitters.

Status Solanki says the technology can reach 10 Mbps today and will reach 100 Mbps by yearend. Velmenni, which completed an Airbus business-accelerator program in Hamburg in 2015, says it’s developing Li-Fi applications for airplane cabins and cockpits with clients it declined to name, as well as hardware for outdoor use.

Excerpt from Bloomberg