Scientists Reshape Connectivity With Li-Fi Technology
Led by Professor Chung Dae-sung at Pohang University of Science and Technology in South Korea, a team of researchers has pioneered a new type of visible light communication (VLC) technology that can potentially transmit data faster than the current wireless-fidelity (Wi-Fi) technology. The newly developed light-fidelity (Li-Fi) may be the future of wireless communication.
Unlike Wi-Fi, which uses electromagnetic radio waves to transmit data, Li-Fi uses infrared or ultraviolet light. Previous VLC systems were unstable due to only tapping into the visible light spectrum. It created limitations such as needing a constantly-on light source, requiring a direct line of sight with a receiver, and the technology only working indoors.
In response to these limitations, the researchers have developed a way to mimic white light by using red, blue, and green light emitted from an organic light-emitting diode (OLED) array. This tri-color VLC system experiences less interference, substantially improving data transmission stability and accuracy.
OLEDs use an organic layer to generate light and are a common component of modern TV screens, smartphones, and laptops. Their greater sensitivity at specific wavelengths makes them well-suited for integration into receivers.
Demonstrating Li-Fi’s practicality, the research team fitted indoor lighting fixtures with the composite light source to transfer data. The result was a lower bit error rate compared with conventional lighting. The researchers anticipate the adoption of this next generation of wireless communication. But they must first look for a solution to the problem of physical barriers, like the walls of a house.
Sean Jung Director junior/1707356236/1613368089
1. What type of communication technology has the research team at Pohang University of Science and Technology pioneered?
2. How does Li-Fi differ from traditional Wi-Fi in terms of the spectrum used for data transmission?
3. What is the key improvement introduced by the researchers to enhance data transmission stability and accuracy in Li-Fi?
4. What type of light source is used to mimic white light in the Li-Fi system, and why is it considered an improvement?
1. Discuss the potential advantages of Li-Fi over Wi-Fi in terms of data transmission speed and stability.
2. Explore the possible applications of Li-Fi technology beyond data transmission, considering its use of organic light-emitting diodes (OLEDs).
3. In what scenarios or environments do you think Li-Fi could be more advantageous compared to traditional Wi-Fi?
4. Consider the challenges involved in overcoming physical barriers for Li-Fi adoption, and brainstorm potential solutions.