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.
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 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.
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
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.
LiFi is not the replacement of WiFi technology. It can be considered as incredible companion of the WiFi technology. It operates between 380 nm to 780 nm optical range. LiFi is used to exchange data incredibly rapidly and securely at much lower power level compare to WiFi.
Light Fidelity (Li-Fi ) is a bidirectional, high speed and fully networked wireless communication technology similar to Wi-Fi. The term was coined by Harald Haas and is a form of visible light communication and a subset of optical wireless communications (OWC) and could be a complement to RF communication (Wi-Fi or Cellular network), or even a replacement in contexts of data broadcasting. It is so far measured to be about 100 times faster than some Wi-Fi implementations, reaching speeds of 224 gigabits per second.
It is wireless and uses visible light communication or infra-red and near ultraviolet (instead of radio frequency waves) spectrum, part of optical wireless communications technology, which carries much more information, and has been proposed as a solution to the RF-bandwidth limitations.