Scientists from Fudan University, Shanghai successfully developed Li-Fi Technology-a new cheaper way of getting connected to internet by using signals sent through light bulbs instead of radio frequencies as in ‘Wi-Fi’.
According to the School of Information Science and Technology at Fudan University, researchers modulated Internet signals to a 1watt LED lamp. Under the light, four computers were able to access the Internet.
According to the School of Information Science and Technology at Fudan University, researchers modulated Internet signals to a 1watt LED lamp. Under the light, four computers were able to access the Internet.
About Li-Fi Technology
The LED-based alternative to Wi-Fi, dubbed Li-Fi, or Light Fidelity, refers to a type of visible light communication technology that delivers a networked, mobile, high-speed communication solution in a similar manner to Wi-Fi.
As with radio waves, light is also a type of electromagnetic wave. The basic rule for sending and receiving Internet signals via light waves is similar to that for radio waves. Light-emitting diodes are switched on and off much faster than the eye can detect, which makes the light source appear to be continuous.
By adding a microchip to an LED bulb to control on and off switching, the data will flow as binary code: an on LED is a logical "1" while when off it is a logical "0".
The term Li-Fi was coined by Harald Haas from the University of Edinburgh in the UK and refers to a type of visible light communication technology that delivers a networked, mobile, high-speed communication solution in a similar manner as Wi-Fi.
Sample Li-Fi kits will be on display at the China International Industry Fair that will kick off on 5 November 2013 in Shanghai.
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