Harald Haas: Forget Wi-Fi. Meet the new Li-Fi Internet
הראלד האס: פריצת דרך באינטרנט אלחוטי
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
acting as a receiver.
המקלט.
it's just light.
זה רק אור.
extension of the Internet
"The Internet of Things" --
"האינרנט של הדברים" --
connected to the Internet.
שמחוברים לרשת.
of the Internet can only work
תצליח רק
infrastructure as much as possible.
בתשתית הקיימת כמה שאפשר.
and the LED come in.
ונורות הלד נכנסים לתמונה.
to transmit data incredibly fast,
כדי לשדר נתונים מהר מאוד,
of the brightness.
we have many LEDs around us,
יש הרבה נורות לד מסביבנו,
of Li-Fi transmitters around us.
של משדרי לי-פי מסביבנו.
special devices -- small photo detectors,
במכשירים מיוחדים -- גלאי אור קטנים,
encoded in the data.
existing infrastructure
שתוכל להשתמש בתשתית קיימת
solar cells and solar panels.
ומשטחים סולרים.
and converts it into electrical energy.
וממיר אותו לאנרגיה חשמלית.
to charge our mobile phone.
בתא סולרי בכדי להטעין את הטלפון הנייד.
of the brightness of the LED,
בהירות נורת הלד.
from the solar cell.
a principal mechanism in place
and by the solar cell,
of the energy harvested
changes of the brightness,
עדינים ומהירים בבהירות,
by our LED lights?
megabytes per second
50 מגה ביט לשנייה
broadband connections these days.
off-the-shelf LED lamp.
off-the-shelf solar cell;
we harvest from the solar cell.
מהתא הסולרי.
something at the moment.
harvests light from the ambient light.
קלט אור מן הסביבה
is switch on the light,
the instrument jumps to the right.
from this artificial light source.
the streaming of the video.
של הוידאו
by pressing this button.
is streaming a video
in a very subtle way,
בצורה עדינה מאוד,
recognize with your eye,
are too fast to recognize.
the energy harvesting drops
the video will restart.
and energy harvesting stops as well.
קבלת האנרגיה תעצור גם כן.
acts as a receiver.
is a street light, and there's fog.
היא מנורת רחוב, ויש ערפל.
a handkerchief with me.
over the solar cell.
כצפוי,
the handkerchief to the solar cell,
אל התא הסולרי,
and stream that information,
ולהעביר את המידע,
a solar cell has become a receiver
encoded in light,
שמקודדים באור.
as an energy-harvesting device.
על תכונתו כמכשיר קולט אנרגיה.
on the roof of a hut
or indeed, lamp post.
where the beam hits the solar cell.
integrated into windows,
שנמצאים בתוך חלונות,
into street furniture,
into these billions of devices
מילארדי מכשירים.
these devices regularly,
את המכשירים האלו בצורה קבועה,
every few months.
I've shown this in public.
that we can take this to market
שאנחנו יכולים לקחת את זה לשוק.
to closing the digital divide,
לסגירת הפער הדיגטלי,
of devices to the Internet.
of energy consumption --
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