ABOUT THE SPEAKER
Harald Haas - Communications technology innovator
Harald 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."

More profile about the speaker
Harald Haas | Speaker | TED.com
TEDGlobal>London

Harald Haas: Forget Wi-Fi. Meet the new Li-Fi Internet

Harald Haas: Otkriće nove vrste bežićnog Interneta

Filmed:
2,751,742 views

Što kad biste mogli koristiti postojeće tehnologije da pružite pristup Internetu više od 4 milijarde ljudi koji žive na mjestima gdje to infrastruktura ne podržava? Koristeći kupovne LED diode i solarne ćelije, Harald Haas i njegov tim su razvili novu tehnologiju koja prenosi podatke putem svjetla i možda će upravo ona premostiti digitalnu podjelu. Pogledajte kako bi mogla izgledati budućnost Interneta.
- Communications technology innovator
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.

00:12
I would like to demonstratepokazati
for the first time in publicjavnost
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Želio bih prvi puta u javnosti
demonstrirati
00:16
that it is possiblemoguće to transmitprenositi a videovideo
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da je moguće poslati video
00:20
from a standardstandard off-the-shelfgotovim LED lampsvjetiljka
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sa standardne LED svjetiljke
00:24
to a solarsolarni cellćelija with a laptoplaptop
actinggluma as a receiverprijemnik.
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na solarnu ćeliju sa laptopom kao
prijamnikom.
00:30
There is no Wi-FiWi-Fi involvedumiješan,
it's just lightsvjetlo.
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Wi-Fi nije uključen,
samo svjetlo.
00:33
And you maysvibanj wonderčudo, what's the pointtočka?
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Možda se pitate,
koja je poanta?
00:35
And the pointtočka is this:
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Poanta je ovo:
00:38
There will be a massivemasivan
extensionnastavak of the InternetInternet
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Postojat će ogromni produžetak
Interneta
00:41
to closeblizu the digitaldigitalni dividepodijeliti,
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da premosti digitalnu podjelu,
00:43
and alsotakođer to allowdopustiti for what we call
"The InternetInternet of Things" --
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i da dopusti ono što nazivamo
"Internet Stvari" --
00:48
tensdeseci of billionsmilijarde of devicesuređaji
connectedpovezan to the InternetInternet.
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deseci milijardi uređaja spojeni
na Internet.
00:51
In my viewpogled, suchtakav an extensionnastavak
of the InternetInternet can only work
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Po mom mišljenju, takav produžetak
Interneta može raditi jedino
00:55
if it's almostskoro energy-neutralenergetski-Neutralnu.
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ako je skoro energetski neutralan.
00:58
This meanssredstva we need to use existingpostojanje
infrastructureinfrastruktura as much as possiblemoguće.
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To znači da moramo koristiti postojeću
infrastrukturu što je više moguće.
01:03
And this is where the solarsolarni cellćelija
and the LED come in.
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Tu u priču ulaze solarne ćelije
i LED svjetla.
01:08
I demonstratedpokazao for the first time,
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Demonstrirao sam prvi puta
01:11
at TEDTED in 2011,
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na TED-u 2011. godine,
01:13
Li-FiLi-Fi, or LightSvjetlo FidelityVjernost.
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Li-Fi, ili Light Fidelity.
01:15
Li-FiLi-Fi usesnamjene off-the-shelfgotovim LEDsLED lampice
to transmitprenositi datapodaci incrediblynevjerojatno fastbrzo,
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Li-Fi koristi kupovne LED diode
za veoma brz prijenos podataka,
01:21
and alsotakođer in a safesef and secureosigurati mannerdržanje.
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na siguran način.
01:25
DataPodataka is transportedprevozi by the lightsvjetlo,
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Podatak se prenosi putem svjetla,
01:28
encodedkodirani in subtlefin changespromjene
of the brightnesssvjetlost.
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enkodiran u suptilnim promjenama
svjetline.
01:32
If we look around,
we have manymnogi LEDsLED lampice around us,
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Ako pogledate oko sebe, vidjet ćete
mnoštvo LED svjetiljki u okolini,
01:35
so there's a richbogat infrastructureinfrastruktura
of Li-FiLi-Fi transmittersodašiljači around us.
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prema tome postoji bogata
infrastruktura LI-Fi odašiljača oko nas.
01:41
But so fardaleko, we have been usingkoristeći
specialposeban devicesuređaji -- smallmali photofoto detectorsdetektori,
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No, dosad, smo koristili posebne
uređaje -- male fotodetektore,
01:46
to receivedobiti the informationinformacija
encodedkodirani in the datapodaci.
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za primanje informacija
enkodiranih u podatke.
01:50
I wanted to find a way to alsotakođer use
existingpostojanje infrastructureinfrastruktura
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Želio sam pronaći način da
se iskoristiti postojeća infrastruktura
01:54
to receivedobiti datapodaci from our Li-FiLi-Fi lightssvjetla.
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za primanje podataka putem
Li-Fi svjetla.
01:58
And this is why I have been looking into
solarsolarni cellsStanice and solarsolarni panelspaneli.
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I zato sam se počeo baviti solarnim
ćelijama i solarnim panelima.
02:03
A solarsolarni cellćelija absorbsupija lightsvjetlo
and convertspretvara it into electricalelektrična energyenergija.
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Solarna ćelija upija i pretvara
svjetlost u električnu energiju.
02:08
This is why we can use a solarsolarni cellćelija
to chargenaplatiti our mobilemobilni phonetelefon.
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Zato možemo koristiti solarne ćelije
za punjenje mobitela.
02:13
But now we need to rememberzapamtiti
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Prisjetimo se da
02:14
that the datapodaci is encodedkodirani in subtlefin changespromjene
of the brightnesssvjetlost of the LED,
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su podaci enkodirani u suptilnim
promjenama svjetline LED diode,
02:21
so if the incomingdolazni lightsvjetlo fluctuatesvarira,
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te ako je dolazno svjetlo promjenjivo,
02:24
so does the energyenergija harvestedbere
from the solarsolarni cellćelija.
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onda je promjenjiva i energija
prikupljena u solarnoj ćeliji.
02:28
This meanssredstva we have
a principalRavnatelj mechanismmehanizam in placemjesto
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To znači da imamo prinicipijelni
mehanizam
02:32
to receivedobiti informationinformacija from the lightsvjetlo
and by the solarsolarni cellćelija,
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za primanje informacije iz svjetla
pomoću solarne ćelije,
02:38
because the fluctuationsfluktuacije
of the energyenergija harvestedbere
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jer fluktuacije prikupljene energije
02:41
correspondodgovaraju to the datapodaci transmittedprenose.
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odgovaraju prenesenim podacima.
02:43
Of coursenaravno the questionpitanje is:
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Naravno, pitanje je:
02:46
can we receivedobiti very fastbrzo and subtlefin
changespromjene of the brightnesssvjetlost,
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možemo li primati veoma brze i suptilne
promjene svjetline,
02:50
suchtakav as the onesone transmittedprenose
by our LED lightssvjetla?
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poput one koje naše LED svjetlo
odašilje?
02:54
And the answerodgovor to that is yes, we can.
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A odgovor na to pitanje je, da, možemo.
02:58
We have shownprikazan in the lablaboratorija
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Ispitivanje u laboratoriju
03:00
that we can receivedobiti up to 50
megabytesmegabajta perpo seconddrugi
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je pokazalo da je moguće
primati do 50 MB po sekundi
03:03
from a standardstandard, off-the-shelfgotovim solarsolarni cellćelija.
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pomoću standardne, kupovne solarne ćelije.
03:06
And this is fasterbrže than mostnajviše
broadbandširokopojasni connectionsveze these daysdana.
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Ovo je mnogo veća brzina od
većine širokopojasnih veza.
03:11
Now let me showpokazati you in practicepraksa.
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Dopustite da vam demonstriram.
03:17
In this boxkutija is a standardstandard,
off-the-shelfgotovim LED lampsvjetiljka.
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U ovoj kutiji se nalazi standardna,
kupovna LED svjetiljka.
03:23
This is a standardstandard,
off-the-shelfgotovim solarsolarni cellćelija;
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Ovo je standardna,
kupovna solarna ćelija;
03:25
it is connectedpovezan to the laptoplaptop.
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spojena je na laptop.
03:28
And alsotakođer we have an instrumentinstrument here
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Također, ovdje imamo instrument
03:31
to visualizevizualizirati the energyenergija
we harvestžetva from the solarsolarni cellćelija.
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koji vizualizira energiju prikupljenu
pomoću solarne ćelije.
03:35
And this instrumentinstrument showspokazuje
something at the momenttrenutak.
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Ovaj instrument trenutno
pokazuje nešto.
03:37
This is because the solarsolarni cellćelija alreadyveć
harvestsvršidbe lightsvjetlo from the ambientambijent lightsvjetlo.
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Zato što solarna ćelija već prikuplja
svjetlo iz okoline.
03:43
Now what I would like to do first
is switchprekidač on the lightsvjetlo,
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Prvo bih htio uključiti svjetlo,
03:45
and I'll simplyjednostavno, only switchprekidač on the lightsvjetlo,
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tako da ću prvo samo uključiti svjetlo,
03:48
for a momenttrenutak,
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na trenutak,
03:50
and what you'llvi ćete noticeobavijest is that
the instrumentinstrument jumpsskokovi to the right.
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i primjetit ćete da instrument
skače udesno.
03:54
So the solarsolarni cellćelija, for a momenttrenutak,
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Solarna ćelija, trenutno,
03:56
is harvestingberbu energyenergija
from this artificialUmjetna lightsvjetlo sourceizvor.
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prikuplja energiju iz
ovog umjetnog izvora svjetlosti.
04:00
If I turnskretanje it off, we see it dropsKapi.
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Ako ga isključim, vidimo da opada.
04:03
I turnskretanje it on ...
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Uključim ga...
04:05
So we harvestžetva energyenergija with the solarsolarni cellćelija.
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Prema tome, prikupljamo energiju pomoću
solarne ćelije.
04:08
But nextSljedeći I would like to activateaktiviranje
the streamingtekući of the videovideo.
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Sljedeće bih želio pokrenuti prijenos
videa.
04:15
And I've doneučinio this
by pressingpritiskom this buttondugme.
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To ću napraviti pritiskanjem
ove tipke.
04:17
So now this LED lampsvjetiljka here
is streamingtekući a videovideo
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Ova LED svjetiljka sada prenosi
video
04:22
by changingmijenjanje the brightnesssvjetlost of the LED
in a very subtlefin way,
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promjenom svjetline LED diode na
veoma suptilan način,
04:26
and in a way that you can't
recognizeprepoznati with your eyeoko,
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na način na koji ne možete
primjetiti golim okom,
04:29
because the changespromjene
are too fastbrzo to recognizeprepoznati.
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jer su promjene prebrze
da bi ih primjetili.
04:33
But in ordernarudžba to provedokazati the pointtočka,
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Da bih vam dokazao,
04:35
I can blockblok the lightsvjetlo of the solarsolarni cellćelija.
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mogu blokirati svjetlo solarne ćelije.
04:40
So first you noticeobavijest
the energyenergija harvestingberbu dropsKapi
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Prvo primjećujete pad prikupljene
energije
04:43
and the videovideo stopszaustavlja as well.
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i video staje, također.
04:45
If I removeukloniti the blockageblokiranje,
the videovideo will restartponovno pokretanje.
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Kad uklonim prepreku, video
počinje ponovno.
04:49
(ApplausePljesak)
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(Pljesak)
04:55
And I can repeatponoviti that.
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I može se ponoviti.
04:57
So we stop the transmissionprijenos of the videovideo
and energyenergija harvestingberbu stopszaustavlja as well.
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Prekinemo prijenos videa i
prikupljanje energije prestaje, također.
05:03
So that is to showpokazati that the solarsolarni cellćelija
actsdjela as a receiverprijemnik.
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To pokazuje da se solarna ćelija
ponaša kao prijamnik.
05:08
But now imaginezamisliti that this LED lampsvjetiljka
is a streetulica lightsvjetlo, and there's fogmagla.
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Zamislite da je LED svjetiljka
ulično svjetlo, i magla je.
05:14
And so I want to simulatesimulirati fogmagla,
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Želim simulirati maglu,
05:16
and that's why I broughtdonio
a handkerchiefrupčić with me.
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zato sam ponio maramicu sa sobom.
05:19
(LaughterSmijeh)
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(Smijeh)
05:20
And let me put the handkerchiefrupčić
over the solarsolarni cellćelija.
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Stavimo maramicu preko solarne ćelije.
05:25
First you noticeobavijest
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Prvo primjetite
05:27
the energyenergija harvestedbere dropsKapi, as expectedočekuje se,
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da prikupljanje energije opada,
kao što je i očekivano,
05:31
but now the videovideo still continuesnastavlja.
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ali video ipak nastavlja.
05:34
This meanssredstva, despitebez obzira na the blockageblokiranje,
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Ovo znači, usprkos blokadi,
05:37
there's sufficientdovoljno lightsvjetlo comingdolazak throughkroz
the handkerchiefrupčić to the solarsolarni cellćelija,
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dovoljna količina svjetlosti dopire
kroz maramicu do solarne ćelije,
05:41
so that the solarsolarni cellćelija is ableu stanju to decodedekodiranje
and streampotok that informationinformacija,
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da bi solarna ćelija dekodirala i
prenijela tu informaciju,
05:46
in this casespis, a high-definitionpovisok-definicija videovideo.
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u ovom slučaju, video visoke razlučivosti.
05:51
What's really importantvažno here is that
a solarsolarni cellćelija has becomepostati a receiverprijemnik
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Ono što je zaista bitno ovdje je
da solarna ćelija postaje prijamnik
05:56
for high-speedvelike brzine wirelessbežični signalssignali
encodedkodirani in lightsvjetlo,
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za bežične signale visoke brzine
enkodirane u svjetlu,
06:00
while it maintainsodržava its primaryosnovni functionfunkcija
as an energy-harvestingEnergetski berbu deviceuređaj.
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dok zadržava svoju prvotnu funkciju
uređaja za prikupljanje energije.
06:05
That's why it is possiblemoguće
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Zato je moguće
06:08
to use existingpostojanje solarsolarni cellsStanice
on the roofkrov of a hutkoliba
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koristiti postojeće solarne ćelije
na krovu nastambe
06:12
to actčin as a broadbandširokopojasni receiverprijemnik
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kao širokopojasne prijemnike
06:14
from a laserlaser stationstanica on a closeblizu by hillbrdo,
or indeeddoista, lampsvjetiljka postpošta.
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od laserske stanice na obližnjem brdu,
ili stub za uličnu rasvjetu.
06:19
And It really doesn't matterstvar
where the beamzraka hitshitovi the solarsolarni cellćelija.
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Zaista nije bitno gdje zraka
pogodi solarnu ćeliju.
06:23
And the sameisti is truepravi
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Isto vrijedi i za
06:24
for translucentprozračan solarsolarni cellsStanice
integratedintegriran into windowsprozori,
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prozirne solarne ćelije
integrirane u prozorima,
06:28
solarsolarni cellsStanice integratedintegriran
into streetulica furniturenamještaj,
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solarne ćelije integrirane
u ulične elemente,
06:32
or indeeddoista, solarsolarni cellsStanice integratedintegriran
into these billionsmilijarde of devicesuređaji
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ili solarne ćelije intregrirane u ove
milijarde uređaja
06:36
that will formoblik the InternetInternet of Things.
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koji će tvoriti Internet Stvari.
06:38
Because simplyjednostavno,
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Jer, jednostavno,
06:40
we don't want to chargenaplatiti
these devicesuređaji regularlyredovito,
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ne želimo puniti ove uređaje
redovno,
06:42
or worsegore, replacezamijeniti the batteriesbaterije
everysvaki fewnekoliko monthsmjeseci.
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ili još gore, mijenjati baterije
svakih par mjeseci.
06:46
As I said to you,
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Kao što sam rekao,
06:48
this is the first time
I've shownprikazan this in publicjavnost.
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ovo je prvi puta da je
ovo prikazano u javnosti.
06:50
It's very much a lablaboratorija demonstrationdemonstracija,
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Ovo je laboratorijska demonstracija,
06:52
a prototypeprototip.
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prototip.
06:54
But my teamtim and I are confidentuvjeren
that we can take this to markettržište
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No, moj tim i ja smo uvjereni
da možemo izaći na tržište sa ovim
06:57
withinunutar the nextSljedeći two to threetri yearsgodina.
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u sljedeće dvije do tri godine.
07:00
And we hopenada we will be ableu stanju to contributedoprinijeti
to closingzatvaranje the digitaldigitalni dividepodijeliti,
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Nadamo se ćemo moći doprinijeti
premoštavanju digitalne podjele,
07:05
and alsotakođer contributedoprinijeti
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i također, doprinijeti
07:06
to connectingspojni all these billionsmilijarde
of devicesuređaji to the InternetInternet.
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spajanju svih ovih milijardi uređaja
na Internet.
07:10
And all of this withoutbez causinguzrok
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I sve to bez uzrokovanja
07:11
a massivemasivan explosionEksplozija
of energyenergija consumptionpotrošnja --
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masivne eksplozije
potrošnje energije --
07:14
because of the solarsolarni cellsStanice,
quitedosta the oppositesuprotan.
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zbog solarnih ćelija,
upravo suprotno.
07:16
Thank you.
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Hvala vam.
07:17
(ApplausePljesak)
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(Pljesak)
Translated by Sonja Zaric
Reviewed by Ivan Stamenkovic

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ABOUT THE SPEAKER
Harald Haas - Communications technology innovator
Harald 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."

More profile about the speaker
Harald Haas | Speaker | TED.com