Harald Haas: Forget Wi-Fi. Meet the new Li-Fi Internet
Harald Haas: Novo avanço tecnológico da Internet sem fio
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.
for the first time in public
pela primeira vez ao público
de LED disponíveis no mercado
com um laptop como receptor.
acting as a receiver.
it's just light.
extension of the Internet
"Internet das Coisas",
"The Internet of Things" --
conectados à Internet.
connected to the Internet.
da Internet só pode funcionar
of the Internet can only work
infrastructure as much as possible.
da infraestrutura existente.
and the LED come in.
to transmit data incredibly fast,
para transmitir dados
of the brightness.
we have many LEDs around us,
há muitos LEDs à nossa volta,
de Li-Fi em torno de nós.
of Li-Fi transmitters around us.
special devices -- small photo detectors,
especiais: pequenos fotodectores
codificadas em dados.
encoded in the data.
existing infrastructure
de aproveitar a infraestrutura existente
solar cells and solar panels.
sobre células e painéis solares.
and converts it into electrical energy.
e a converte em energia elétrica.
to charge our mobile phone.
para recarregar os nossos celulares.
por mudanças sutis do brilho do LED,
of the brightness of the LED,
captada da célula solar.
from the solar cell.
a principal mechanism in place
aqui um mecanismo principal
da luz e da célula solar,
and by the solar cell,
of the energy harvested
tão rápidas e sutis de brilho,
changes of the brightness,
por nossas luzes de LED?
by our LED lights?
50 MB por segundo
megabytes per second
solares disponíveis.
broadband connections these days.
das conexões existentes de banda larga.
off-the-shelf LED lamp.
simples de lâmpada de LED.
off-the-shelf solar cell;
de energia através da célula solar.
we harvest from the solar cell.
mostra-nos algo neste momento.
something at the moment.
já está captando a luz do ambiente.
harvests light from the ambient light.
is switch on the light,
é acender a luz,
por um instante,
do instrumento move-se para a direita.
the instrument jumps to the right.
através deste recurso artificial.
from this artificial light source.
que o ponteiro cai para a esquerda.
the streaming of the video.
by pressing this button.
está acionando um vídeo
is streaming a video
de forma muito sutil,
in a very subtle way,
recognize with your eye,
são muito rápidas para percebermos.
are too fast to recognize.
the energy harvesting drops
a queda da captação energética
the video will restart.
e a captação energética para também.
and energy harvesting stops as well.
atua como um receptor.
acts as a receiver.
is a street light, and there's fog.
de LED esteja na rua e haja cerração.
a handkerchief with me.
over the solar cell.
na célula solar pelo lenço,
the handkerchief to the solar cell,
e acionar aquela informação,
and stream that information,
a solar cell has become a receiver
a célula solar transformou-se num receptor
sem fio codificados por luz,
encoded in light,
de captação energética.
as an energy-harvesting device.
no telhado de uma cabana
on the roof of a hut
ou de poste de iluminação.
or indeed, lamp post.
where the beam hits the solar cell.
o feixe incide sobre a célula solar.
integradas às janelas,
integrated into windows,
ao equipamento urbano,
into street furniture,
aos bilhões de equipamentos
into these billions of devices
recarregá-los constantemente
these devices regularly,
suas baterias em poucos meses.
every few months.
que o apresento em público.
I've shown this in public.
that we can take this to market
de que vamos trazê-lo ao mercado
to closing the digital divide,
ao fechamento do fosso digital,
esses bilhões de aparelhos de Internet.
of devices to the Internet.
of energy consumption --
agem de forma oposta.
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