Harald Haas: Forget Wi-Fi. Meet the new Li-Fi Internet
Harald Haas: Ett helt nytt trådlöst internet
Harald Haas is the pioneer behind a new technology that can communicate as well as illuminate. Full bio
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for the first time in public
för första gången inför publik,
acting as a receiver.
med en laptop som mottagare.
it's just light.
det är bara ljus.
extension of the Internet
en massiv utökning av Internet
"The Internet of Things" --
"Sakernas Internet" -
connected to the Internet.
anslutna till Internet.
of the Internet can only work
av Internet bara genomföras
existerande infrastruktur
infrastructure as much as possible.
and the LED come in.
och LED-lampan kommer in i bilden.
to transmit data incredibly fast,
för att överföra data extremt snabbt,
of the brightness.
i lampans ljusstyrka.
we have many LEDs around us,
många LED-lampor omkring oss,
of Li-Fi transmitters around us.
av LiFi-sändare omkring oss.
special devices -- small photo detectors,
speciella apparater, små fotodetektorer
encoded in the data.
kodad i data.
existing infrastructure
att använda existerande infrastruktur
solar cells and solar panels.
solceller och solpaneler.
and converts it into electrical energy.
och omvandlar det till elektrisk energi.
to charge our mobile phone.
för att ladda våra mobiltelefoner.
of the brightness of the LED,
i LED-lampans ljusstyrka,
from the solar cell.
som samlas in från solcellen.
a principal mechanism in place
en principiell mekanism på plats
and by the solar cell,
från ljuset till solcellen,
of the energy harvested
i den insamlade energin
changes of the brightness,
och subtila ändringar i ljusstyrkan,
by our LED lights?
i våra LED-lampor?
megabytes per second
upp till 50 Mbit per sekund
broadband connections these days.
än de flesta av dagens bredband.
off-the-shelf LED lamp.
butiksköpt LED-lampa.
off-the-shelf solar cell;
butiksköpt solcell
we harvest from the solar cell.
vi samlar in från solcellen.
something at the moment.
harvests light from the ambient light.
samlar in ljus från omgivningen.
is switch on the light,
the instrument jumps to the right.
hoppar till höger.
from this artificial light source.
the streaming of the video.
överföringen av videon.
by pressing this button.
på den här knappen.
is streaming a video
in a very subtle way,
på ett subtilt sätt.
recognize with your eye,
med vanlig syn,
are too fast to recognize.
för snabbt för att märkas.
the energy harvesting drops
att energiinsamlingen sjunker,
the video will restart.
så fortsätter videon.
and energy harvesting stops as well.
samtidigt som energin sjunker.
acts as a receiver.
agerar som en mottagare.
is a street light, and there's fog.
är en gatlykta, och att det är dimma.
a handkerchief with me.
tog med mig en näsduk.
over the solar cell.
the handkerchief to the solar cell,
genom näsduken på solcellen,
and stream that information,
och strömma informationen,
a solar cell has become a receiver
att en solcell har blivit en mottagare
encoded in light,
as an energy-harvesting device.
som en energisamlande apparat
on the roof of a hut
på taket av en hydda
or indeed, lamp post.
kulle, eller från en gatlykta.
where the beam hits the solar cell.
var strålen träffar solcellen.
integrated into windows,
som är integrerade med fönster,
into street furniture,
med gatumöbler,
into these billions of devices
med dessa miljarder apparater
ladda dessa apparater regelbundet,
these devices regularly,
every few months.
efter ett par månader.
som den har visats för allmänheten.
I've shown this in public.
that we can take this to market
att den kan dyka upp på marknaden
to closing the digital divide,
till att minska det digitala gapet,
of devices to the Internet.
miljarder apparater till Internet.
of energy consumption --
av energikonsumtion -
får vi snarare det omvända.
quite the opposite.
ABOUT THE SPEAKER
Harald Haas - Communications technology innovatorHarald Haas is the pioneer behind a new technology that can communicate as well as illuminate.
Why you should listen
Imagine using your car headlights to transmit data ... or surfing the web safely on a plane, tethered only by a line of sight. Harald Haas is working on it. He currently holds the Chair of Mobile Communications at the University of Edinburgh, and is co-founder and Chief Scientific Officer of pureLiFi Ltd as well as the Director of the LiFi Research and Development Center at the University of Edinburgh. His main research interests are in optical wireless communications, hybrid optical wireless and RF communications, spatial modulation, and interference coordination in wireless networks.
Haas has long been studying ways to communicate electronic data signals, designing modulation techniques that pack more data onto existing networks. But his latest work leaps beyond wires and radio waves to transmit data via an LED bulb that glows and darkens faster than the human eye can see. His group published the first proof-of-concept results demonstrating that it is possible to to turn commercially available light emitting diode (LED) light bulbs into broadband wireless transmission systems.
"It should be so cheap that it's everywhere," he says. "Using the visible light spectrum, which comes for free, you can piggy-back existing wireless services on the back of lighting equipment."
Harald Haas | Speaker | TED.com