Harald Haas: Forget Wi-Fi. Meet the new Li-Fi Internet
Harald Haas: Ein bahnbrechendes neues drahtloses Internet
Harald Haas is the pioneer behind a new technology that can communicate as well as illuminate. Full bio
Double-click the English transcript below to play the video.
öffentlich vorführen,
for the first time in public
handelsüblicher Standard-LED-Leuchte
acting as a receiver.
it's just light.
ohne Wi-Fi, nur mit Licht.
Wozu das alles?
extension of the Internet
des Internets wird stattfinden,
möglich zu machen --
"The Internet of Things" --
die mit dem Internet verbunden sind.
connected to the Internet.
diese Ausweitung nur funktionieren,
of the Internet can only work
existierende Infrastruktur nutzen.
infrastructure as much as possible.
and the LED come in.
und LED-Leuchte ins Spiel.
um Daten unglaublich schnell
to transmit data incredibly fast,
in der Helligkeit übertragen.
of the brightness.
we have many LEDs around us,
Infrastruktur an Li-Fi-Sendern.
of Li-Fi transmitters around us.
special devices -- small photo detectors,
kleine Lichtdetektoren -- verwendet,
Information zu empfangen.
encoded in the data.
existing infrastructure
Infrastruktur nutzen,
Li-Fi-Leuchten zu empfangen.
solar cells and solar panels.
und Solarkollektoren studiert.
and converts it into electrical energy.
wandelt sie in elektrische Energie um.
to charge our mobile phone.
um unser Handy aufzuladen.
der LED-Helligkeit verschlüsselt.
of the brightness of the LED,
Solarzelle gewonnene Energie.
from the solar cell.
a principal mechanism in place
einen Grundmechanismus geben muss,
und die Solarzelle zu erhalten,
and by the solar cell,
of the energy harvested
Helligkeitsänderungen empfangen,
changes of the brightness,
LED-Leuchten übertragen werden?
by our LED lights?
megabytes per second
Standardsolarzelle empfangen können.
Breitbandinternetverbindungen heute.
broadband connections these days.
off-the-shelf LED lamp.
eine handelsübliche Standard-LED-Leuchte.
off-the-shelf solar cell;
Standard-Solarzelle,
Solarzelle gewinnen, sichtbar macht.
we harvest from the solar cell.
something at the moment.
vom Licht der Umgebung empfängt.
harvests light from the ambient light.
is switch on the light,
nach rechts ausschlägt.
the instrument jumps to the right.
von der künstlichen Lichtquelle.
from this artificial light source.
the streaming of the video.
Videostreaming aktivieren.
by pressing this button.
das Drücken dieses Knopfes.
LED-Leuchte ein Video
is streaming a video
der Helligkeit der LED,
in a very subtle way,
recognize with your eye,
are too fast to recognize.
zur Solarzelle blockieren.
the energy harvesting drops
dass die Energiegewinnung abfällt
fängt das Video wieder an.
the video will restart.
endet auch die Energiegewinnung.
and energy harvesting stops as well.
als Empfänger fungiert.
acts as a receiver.
is a street light, and there's fog.
ist eine Straβenlaterne und es gibt Nebel.
a handkerchief with me.
über die Solarzelle.
over the solar cell.
wie erwartet sinkt.
zur Solarzelle dringt.
the handkerchief to the solar cell,
entschlüsseln und übertragen,
and stream that information,
a solar cell has become a receiver
Die Solarzelle ist zu einem Empfänger
Hochgeschwindigkeitssignale geworden,
encoded in light,
as an energy-harvesting device.
als Stromerzeuger beibehält.
existierende Solarzellen
on the roof of a hut
oder einem Laternenmast empfängt.
or indeed, lamp post.
where the beam hits the solar cell.
wo der Strahl die Solarzelle trifft.
Solarzellen in Fenstern,
integrated into windows,
into street furniture,
into these billions of devices
nicht regelmäβig aufladen,
these devices regularly,
die Akkus auswechseln.
every few months.
I've shown this in public.
öffentlich gezeigt habe.
that we can take this to market
dass wir die Technologie
auf den Markt bringen
to closing the digital divide,
die digitale Kluft zu schlieβen,
mit dem Internet zu verbinden.
of devices to the Internet.
Energieverbrauch explodiert.
of energy consumption --
das Gegenteil eintreten.
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