Since it was invented by Thomas Edison, OSRAM has for the people service for more than a century. However, with the advent of the LED lamp, its days depleted. LED lamp power consumption is only 1/10 of incandescent lamp, and the service life is 30 times. Not only that, the use of LED lamps is not limited to lighting, with the invention of smart light bulbs, it was given more additional features, it can make your laptop, smart phone connected to the internet. Put aside Wi-Fi, Li-Fi is coming.
In fact, it's not a new idea to use the visible light to carry on the wireless communication. Everyone knows that in a desert island can be used to attract attention; probably in the Napoleon era, few people know that Europe has been optical cable cover this, or it will not be called a signal lamp.
And by a wisp of smoke in Morse code will continue to partition, formation a distress message, visible light communication - LI-Fi - quickly through adjusting the light intensity, the data compiled into a binary 0 and 1. Such as LED, said 1, off the representation of 0, through a quick switch to transmit information. But this does not mean that the Li-Fi transceiver will blink, as it is more than the speed of adjustment of the human eye.
Vs Li-Fi Wi-Fi
With the use of a huge increase in the number of WiFi, a large number of WiFi data transmission for existing by radio and microwave frequency spectrum of WiFi technology has brought tremendous pressure. With the exponential growth of mobile devices to 2019 is expected to will exceed 100 billion devices, there will be an exchange around 922 Beijing 3372 trillion 368 billion 5477 00000 5808 (10 18) bytes of information. At present, the WiFi technology will not be possible to realize the transmission of the data because of the frequency and electromagnetic interference. The most prominent problem is the urban area, because the city's WiFi users.