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

What if we could use existing technologies to provide Internet access to the more than 4 billion people living in places where the infrastructure can't support it? Using off-the-shelf LEDs and solar cells, Harald Haas and his team have pioneered a new technology that transmits data using light, and it may just be the key to bridging the digital divide. Take a look at what the future of the Internet could look like.
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[@TheRealTristanBell]

Still using WiFi

[@Overonator]

But you need unobstructed line of sight. How practical is that? WiFi radio can go through walls.

[@holleey]

+Overonator the title is misleading. it has different use-cases. LiFi does not replace WiFi

[@ej1250]

+Overonator something like this would be great for LAN and stuff like that. And my computer sits right next to the router so for someone like me, this works out perfect

[@kapil1089theking]

+Overonator mix it up with "trillion frames per second" ted video :P

[@MrC0MPUT3R]

+ej1250 Don't go wireless if you can wire yourself directly to your router. A wired connection is faster and way more power efficient.

[@ej1250]

MrC0MPUT3R yeah i already do that. but i was just explaining that this invention would be good for people who has their computer close to the router. just replace the router with the solar reciever. it should end up being more cost efficient compared to a router that's constantly on while the PC is off

[@daltonw.1687]

Guy: "In the next 2-3 years" Me: *laughs in 2019*

[@fumesolo6709]

its 2020 now

[@ruturajdharav4675]

It's cycle bro

[@EminemLovesGrapes]

The guy is obviously trying to sell this snake oil and failing.

[@mwhearn1]

@@EminemLovesGrapes He demonstrated that it was not snake oil. I think he underestimated how difficult it is to get a product like this to market.

[@RealFemale69]

You want to just download? This is for people in poor countries like Uganda too download information

[@JamesB00n]

But you can only receive data? How do you request data?

[@Jiibrael]

+JamesB00n Yes, rather than local service to customer I see this more as a long distance data transport to local stations and then another tech for local transfer.

[@iluan_]

+JamesB00n Have a laser in the roof of your house pointing back at the source (use the solar panel to power it ! XD). The problem of course would be making sure it never moves, because if it miss-aligns then you wouldn't be able to send data (maybe that could be solved using a network of senders and recievers on the top of each house on the network).

[@Deffinnition]

+JamesB00n Absolutely no upload? x)

[@ramblinevilmushroom]

+iluan Hernandez a weaker more dispersing light you be used to locate the two nodes and they could auto align by using some kind of search algorithm.

[@KSITREVS]

just what I was thinking.

[@SilkyWayFPV]

Would be a great technology to improve communication between cars (especially autonomous) via the headlights and braking lights. Cars could easily determine the car in front of them and communicate if that car approaches an obstacle for example. The speed of data transmission would be way faster than what is possible with mobile data at the moment. This would make autonomous driving more safe I believe.

[@user-vc5ry6qh1b]

True

[@LouesSCat]

This reminds me of the in store price correction systems. Stores rigged up their lighting to pulse signals and electronic price tags picked up the flicker so prices could be updated for specific products or across the store with a minimum of wiring. The price displays were powered and set by the lighting. No wires or signals required.

[@EugeneKhutoryansky]

I see that the drawbacks of this idea have already been commented on by a number of people. Though, still, it is an interesting concept.

[@vedant6633]

Physics Videos by Eugene Khutoryansky hello

[@agussururi1195]

Physics Videos by Eugene Khutoryansky this what we call it nircable FO.... but its still not time .. we need more other support tech 1st ..maybe 50 year in future

[@harshitsrivastava7700]

ur videos are really best please continue making

[@joshuakerger2897]

Why did that request comment just disappear?

[@arunfernandez1999]

It no going to work as internet data transfer because resive and sending is also needed Not only resive?!!! Got it the device can't send data through solar panel to led light 🤣🤣🤣😎😎😊😉

[@MrCheezyCrack]

Comments Section = Facepalm... Li-Fi is, in no way, Replacing Wi-Fi. They have very different uses. Lifi can only receive data.. at the moment.. We can use this technology to bring internet around the world; not for upload, but download. Imagine transmitting the encyclopedia britanica, and any digitized book, to schools in the Congo for virtually no cost. I for one can't wait until we develop more solar-based technology. Maybe then we'll start investing in it because apparently global warming and dissapearing landmass is not reason enough. Maybe if we offer people faster internet, they'll consider it.

[@chrisjacobsen1659]

+MrCheezyCrack And without being able to send a single request packet out to retrieve said encyclopedia/books, how would this one way internet connection provide any benefit to anything. Do you know how TCP/IP works? This thing's use cases are better suited to long distance laser ISP infrastructure in under-developed countries to allow at least a local copper connection to remote areas without laying down miles of cables in the jungle or prairies, and even then yes, they would need two of them per link for bi-directional communication, just like standard networking fibre.

[@MrCheezyCrack]

***** the books would be sent and stored on HDD locally.. no need to send request through ISP at that point.

[@chrisjacobsen1659]

I agree, but the data of 'said books' would have to get onto the HDD's from the Internet in the first place at some point, and this would only be possible (with shown setup) through a broadcast packet transmission (which is how they were playing that video), of the same thing to everyone connected, and has to be initiated on the remote end, and the clients would have to have external knowledge of this upcoming transmission in order to download this book. If a packet gets lost on its way to you it could mean a corrupted, unrecoverable download. If the user misses the beginning of the transmission, tough luck, no download, the negatives go on and on. TCP, which is how most of the world transfers data requires two way communication, no way around it. This would be well suited to BROADCAST TV transmission, but again I think radio transmission is way cheaper than this, just tight on bandwidth.

[@janvierma]

Technically that can be done now via Satellite. In fact, my ISP specializes in providing Internet via satellite in remote parts of Africa! Good and valid point though ☺

[@MrCheezyCrack]

***** My main point is that people are being critical of a technology that can revolutionize the way we look at internet/solarpower and many other things. They're being pessimists and disguising it as being realists.

[@zeromailss]

Calm down people,its still a prototype, you remember a prototype of phone years ago? from what I can see,it might be useful in many ways,lets wait for few years.

[@carsonhunt4642]

It's true it's not practical at all. How is the laser been gonna focus on a moving solar cell? Not only that it only receives, can't send. So imo is basically useless. It's still cool none the less, just not at all Practical, and I don't think it will be, not any time soon.

[@666Tomato666]

+Yukino Takada and us saying how it is deficient to the maker isn't something that the maker can't use?! at the very least he should address them during presentations

[@Urstupidumbass]

Too bad this is existing technology that's been morphed to make it seem unique.

[@Urstupidumbass]

Too bad this is existing technology that's been morphed to make it seem unique.

[@RichardLevitte]

I can't remember the prototype for a phone... late 19th century is a little too far back ;-)

[@StephenRoseDuo]

It's disadvantage can also be its advantage. Advantage/Disadvantage: You need clear line of site from the transmitter to the receiver. This means you guarantee that only people, in the room for example, can see the connection. I believe this can be either an inconvenience or a security feature depending on your goals. Pure Advantage: Because it is using much higher frequency light than WiFi the maximum connection speed limit is far higher than WiFi's.

[@edmundkemper1625]

Wrt the disadvantage, i am sorry i am 7 years late but there is hope with one concept as a potential solution : Reflection of Light

[@leyla6571]

this project is becoming true

[@iviewthetube]

@5:36 . Anyone else notice that the 'fog' did not cover the entire panel?

[@sirisoj]

masses of hot air made the fog stay that way

[@anuragtitus1379]

Does the fog cover the entire sun

[@EminemLovesGrapes]

@@anuragtitus1379 yes.

[@Eddance911]

Such a misleading title. Li-Fi was never intended to replace Wi-Fi.

[@Mr.G_Rattlesnake]

Says who?

[@realamericanpatriots1919]

FANTASTIC IDEA. WORLD CHANGING AND ONE OF THE BEST IDEAS I'VE SEEN IN THE LAST 20 YEARS. ABSOLUTELY GREAT IDEA, MAN. CONGRATS.

[@caifer5099]

Reading through the comments and disappointed with the negative points.. This may not be a complete concept yet, but it's a good start for a better future of the internet.

[@thepsychedelicalien5114]

What do you expected? People, always fear what they cant see or taste. History repeats itself.. with one way or another.

[@Duciousness]

Exactly what Fibre Optics use to transfer at high speeds. Uses Light to transfer.

[@JodBronson]

But he wants LI-FI. LOL

[@KrisHalverson]

My last speeding ticket happened because I thought the limit was 65. The cop said it was 55 mph, which, surprise surprise, it was. Why didn't the speed limit sign tell my car what the current speed trap required and display it on the nice Mazda HUD? Or transmit current road conditions? Wouldn't take much innovation with this technology to make it happen and save me from Louisiana speed traps. Now that would really be a smart car.

[@ChristofferRonaasen]

This definitely has potential! What he showed with the handkerchief means we could have satellites in space spreading a radius of lasers, and even when it's cloudy, you'd still get the stream! And in a storm, we would all lose power anyways.

[@HostLT]

Or we just use antennas, you know.... something that works. I just can't understand how you would focus a Laser over such long distances. I mean air molecules would most likely disturb the signal with all the umidity or heat. I don't want to be rude but to me it sounds like a silly idea.

[@Ngo1ful]

This is an amazing concept. As far as long distance or constant light exposure areas, this would change everything. I wonder how they are going to try and circumvent the problem of physical blockage.

[@Fr4nkSanchez]

The good thing about this is that you can use the current arquitecture, PLC, Power Line Communication. You can use the residential ac wires as your conductor and have all lights as transmitters

[@BethBarany]

I am so excited about this coming technology. I think it will transform how we use everything, including more respect for one of our most valuable resources: light.

[@laur-unstagenameactuallyca1587]

well it was a big lie-fi in the end

[@a946035]

1. No upstream bandwidth 2. Interference from other light sources 3. Requires line-of-sigh 4. Short ranged I'm afraid it just isn't going to work out.

[@amangowalkar]

Forget 2015 ,this is 2018 we still use WI-FI 😂

[@ayberkalat6659]

2019 and still use WI-FI :D

[@dr-ihabtayem1896]

of course we will still use it ;''= because if that technology become public so the wi fi technology will disappear , also i have had read that there is a scitest who discovered a technology used to transfer electricety without a wires so he was killed , why!! financeal side of course ////

[@CarbineKiller]

@@dr-ihabtayem1896 u mean Tesla?

[@AlpHaNuBGaming]

2021 still Wifi XD

[@ندىسلامة-و6ث]

this is 2023 we still use WI-FI 😂

[@josephkoller7914]

I just got out of high school with an electronics shop...I could have build this their. I don't even think any realizes the implications on batteries and how much we use the Internet. If we(first world countries) cut down on our Internet usage we could charge just a few batteries and have them for night/emergencies. Cutting down our consumption, increasing efficiency, and giving EVERYONE access to this wonderful achievement of human success we call the Internet(our connection with an instant but distant world) are all healthy steps for humanity as a whole:) Let's keep up the good work

[@josephkoller7914]

there*

[@djdavidj5531]

This is by no means a new idea. A TV remote controller used infrared light to communicate to the TV.

[@JodBronson]

@basil fawlty - Billions of Codes shining through Sun Light every second. How do you think ALL living things, still living?

[@Fr4nkSanchez]

There is also optogenetics, literally an organic matter can be changed through light

[@GoodVrGames]

A few disadvantages: 1. Too much light noise in the environment (other light sources operating at different frequencies). 2. Need a directional light source and receiver. 3. Can't normal use in dark (at night). 4. Can't normal use at open place, bcos sun. Also. It's not new technology. It's just open optocouple, that using in rotating objects also with wireless power delivery (in lidars e.t.c.).

[@brahmahum]

"The photophone is a telecommunications device that allows transmission of speech on a beam of light. It was invented jointly by Alexander Graham Bell and his assistant Charles Sumner Tainter on February 19, 1880, at Bell's laboratory..." ("Photophone", Wikipedia)

[@mindermedia9136]

But how will it work when other lights are shined on it? And how does each led know what device it is talking to?

[@Appletank8]

+Minder Maniac I'm assuming the same way our phone knows which Wifi router to connect to.

[@SGAFirefly]

+Minder Maniac Probably some initialization protocol.

[@mindermedia9136]

Appletank8 but our phones can talk back through wifi to the router, and the router hands out IP addresses to each individual device, but I don't see an easy way to have my phone talk to an "off-the-shelves" led

[@manalikachare6726]

lifi technology is implemented or not??

[@rsdreamsrahul9621]

It's not light effect it's decoding information from certain wave length

[@bub_lite_6361]

This seems like a fine idea, but I have a question. True, this system 'receives' the digital signal so you can watch the video on your device. The question is, how does the device 'transmit' back through the system? There must be two-way communications between the device and the internet, (duplex). At least by appearances, this seems to communicate in one direction only. How is communication from the device to the internet accomplished?

[@Fr4nkSanchez]

I think you need like a multiplexor. Like electronics, any speaker can be used as a microphone as well.

[@dayonpanyalai8583]

An Arab poetry says : Al ilmu nurun = knowledge is light..what a coincidence

[@amanbansal2851]

Kindly make this possible to publish this project in INDIA as well as demonstrate it in most places and colleges of India ~Love from Indian Citizen

[@boogerking7411]

Just open source it d@mmît. 4yrs already and still nothing

[@GlueDonkey]

What does daatmmît mean

[@laur-unstagenameactuallyca1587]

@Archock Encanto lol

[@eobardthawne6903]

No, the world wouldn't be different if more software were open source. That's just a myth

[@IIlIIlIIlII]

1. How do you request data/upload? 2. If I want to go to the internet or receive internet I need to have my lights on? So I can't browse internet in a dark room without light? or would it be Infra Red light? 3.Obstructions ruining the lights signals

[@КевинЮань]

+NikolaJXPL I would think that when this technology mature, they would have repeater that will send the Li-Fi signal around corners and other obstructions to reach the computers. They already have repeaters for Wi-Fi to reach area where the Wi-Fi signal is weak. They just have not think of it right now in the beginning. But when the Li-Fi technology mature, they will have other technologies to do the same for Li-Fi.

[@benditlike5433]

I wasted my WiFi watching this sci-fi Lifi so bye-bye

[@randomdude9135]

bi-bi **

[@rizos886]

MATH Genius lmao

[@ahmadzaimhilmi]

It's been 2 years now. We seem to have forgotten about li-fi

[@nathanmactaggart2344]

Incredible concept, I can't wait to see this idea progress and be utilised in our future society. Thank you world for the thinkers you create.

[@reality_official]

It's 2023 now. And Hardly anybody knows about it. Trust me, I'm from the future :)

[@fallenknight3352]

A better way to put it would be "Thank you thinkers for the world you create" :)

[@nathanmactaggart2344]

@@fallenknight3352 absolutely, both comments work well. 😊

[@Fr4nkSanchez]

@@reality_official who knows maybe is being used. This can be used as optogenetics and we don know, just by applying different frequency to light could affect our bodies

[@piotrjastrzebskiio]

What was demonstrated, was Light Radio, not network. While cool, WiFi replacement it is not, but probably could be used as extra downstream bandwidth for existing networks.

[@EcstasyTiger]

Really interesting, but wifi can go through walls. Could be really great for new technology and architecture.

[@williamtael8379]

+TheSpaceTiger Satellites, man, satellites... And remember that he said there would be laser stations.

[@rawstarmusic]

+TheSpaceTiger A cable from the solar panel or a wifi converter into the house, what ever is more practical. In Africa, India and parts of south america this could be a solution to all their problems. Now lets see what the sceptic's say. It has to be questioned and tested properly. Thumbs up for his groundbreaking idea.

[@EcstasyTiger]

***** Indeed :)

[@funkeymonkehh]

+Darth Daddy Wi-fi goes thru walls ... also thru your head. I need it like a brain tumour.

[@EcstasyTiger]

Pee Pop There's already a tumour killer in development, if Bowie and Rickman had survived 5 or 6 years later they might have had much longer lives

[@LiranBarsisa]

5:41 The "fog simulation" doesn't fully cover the receiver part... You could say that the bottom part receives the data...

[@RealFemale69]

Does fog cover the sun?

[@freeeducation1569]

6:57 it's 5 years nothing has come!

[@Fr4nkSanchez]

Maybe you are been programmed through optogenetics and you dont know

[@nicholashylton6857]

Fascinating! The demonstration is very reminiscent of tabletop scientific demonstrations & experiments done in the 18th and 19th centuries. It should be extremely interesting to see where this technology goes in the near future. The challenge of sending information from your smart device _back to_ the Net via Li-fi will be daunting.

[@ultravidz]

Okay so we've always been able to transmit data using light and transmit energy using light. This technique allows you to do both at the same time. It's cool but it's not exactly "breakthrough". Solar panels aren't very efficient so there's only a narrow set of applications where this could be useful or practical. I don't see how this could replace wifi in a home, and I don't see how it could offer advancements toward the "internet of things" if all devices require a direct uninterrupted line of sight toward the source of a light beam. If I'm missing something I welcome anyone to help me out..

[@majorgnu]

I suppose the idea is using the same hardware component to both harvest energy from sunlight and receive signals. You'd still need new signal processing hardware and a transmitter, so I don't really see the point in terms of cost effectiveness, over using an independent radio communications module in addition to the solar cell.

[@youreinthewrongplaceshoo.7122]

The idea is to avoid massive energy consumption in future because most of the things will be using wifi. This idea is to conserve energy whereas using light source and making useful out of these solar panels. It is a very very life saving idea.

[@majorgnu]

jade pomar This won't save any appreciable amount of energy compared to wifi. It probably uses even more energy. The point of it is not being low-power to begin with. Don't go forgetting the law of conservation of energy, by the way.

[@quAdxify]

+jade pomar Ye it sounds more interesting than it actually is (fiber-optics also uses light :D ). This will not save lives. It may conserve a bit of energy but the drawbacks are huge, there are much more efficient ways of saving energy. And in all honesty, energy is not that much of a problem, the sun alone could easily power the 10 earths if we had efficient technology. And just for the arguments sake, the biggest waste of energy/ food whatsoever is done by human behaviour, if we would live energy efficient/ nutrient efficient that would make a much much bigger difference than being able to reuse a tiny fraction of the energy that is used for communication.

[@raunakdasgupta8796]

Thnx Mr. Hass it's been an honour to watch your video .recently me with my friends made a lifi project to transmit data using mic it works but also we can't expend distance between transmitter and receiver if you help us we will glad. Finally I must say it is a revolution and if it applicable there will be no problem in data steaming anywhere.

[@DEO777]

What prevents a neighbor from pointing a flashlight or laser pointer on the solar cell and interfering with the data packets?

[@big_bickie]

Dh nlghtnd 1 maybe it will switch to wifi.

[@kellel5610]

fun fact. if you get a microwave to work while opening in your home your wifi will be messed up. Your wifi uses microwaves too. of course your wifi doesnt harm you because its like the difference between a flashlight and an led

[@LiranBarsisa]

Well even in the demonstration he had light from various places, which technically fluctuates ... Seems they've overcome this somehow. Maybe packets get dropped in case of too much interfering, when it detects that something is wrong with the encoded data

[@jasonwatkins5601]

DEO what prevents your neighbor today from stealing packets and giving packets today?

[@fitzmode]

A shotgun

[@wushupants]

I'd rather use this than radio waves. I mean, if houses can be re-engineered so that the lightbulbs in each room transmit data as well as energy, you'll never run out of battery or data. It's like having a router in every room. Then, there could be omnidirectional solar panel spheres installed next to the lightbulbs so it can receive information from your device (from any angle) as your device flickers the data back via some small LED light. And then as the technology progresses, you could turn off the light at night, but still get data if it can be transferred via infrared light, which does not obstruct even in the dark. The idea has potential.

[@KingAlphaOmega]

Ohhhh lifi for Internet. I thought it was about the Wireless energy source, which is again a great idea if anyone come up with that.

[@mayankimmortal]

Rohit Eligeti a conspiracy

[@hlboerr]

I guess google is already doing it

[@mari88334]

Rohit Eligeti tesla

[@f1reguy587]

I saw one, based on the Tesla coil, but it was encrypted and in use in electrically hostile environments. That was years ago and haven’t seen it advance further, the guy was inspired by his cellphone needing power but he couldn’t be bothered plugging it in.

[@Zaraken]

I've watched other talks on the subject (but not this one) and Li-Fi is not meant to replace Wi-Fi but to complement. Why the incorrect title ?

[@haikalt.9279]

2018 already,Li-fi? MORE LIKE LIE-FI

[@ogpogtane7244]

Underrated af

[@lovesickblueslovesickblues5198]

It’s an idea that provokes innovators ,progress waits young man

[@raghuramvenkatapuram3782]

This peace of tech is very, very innovating. I am interested to see how far this tech is gonna go.

[@YuliusGalihAji]

2023 and still... WiFi 🥱

[@aaahhh1180]

LiFi + PS5 = The start of biggest/smoothest multiplayer games ever............So Exciting I think we should not abandon wifi either though

[@ichapman8878]

I figured in due time something would replace WiFi. It’s probably ready now, but energy hogs are lobbying to keep it suppressed.

[@ocpud2999]

More like 5g adopters

[@piyushsinha3463]

What I would like to add to this idea is , "light travels in a straight line(for the sake of this experiment) , and now , in comparison to radio waves , we can emulate the the same effect of radio waves , because "LIGHT SCATTERS" so any light which scatters can be be amplified and further fluctuated to obtain data across recievers. Now , remaining part of interfering with light being scattered , can be handled by providing appropriate recievers to appropriate persons ( I know it's off the topic but not totally)...........

[@Mezurashii5]

Dunno, it seems to me that before this could be succesful, we'll already surpass 50Mb/s standards by a mile. 10 years ago most people used ~1Mb/s, now 40Mb/s isn't such a big deal. Assuming 5 bilion devices in 5 years is rather generous, this technology might be rejected because of it's limitations and security problems that could occur because of the open nature of it. What would an internet source look like anyway? Do they plan to make a new sun just for online connection?

[@Mezurashii5]

***** Yeah, we pay per month as oppose to per tick (or whatever they call it).

[@watvid1]

I think the point of this technology is to allow developing countries to access the Internet rather than those people that already have fibre optic cables

[@williamtael8379]

+Mezurashii5 There are specters of light that we can't see.

[@Mezurashii5]

Rohan Paul I'm not sure how much cheaper it's going to be if you consider the limitations of it, but I guess the presentation didn't show how the thing works in practice. The old-fashioned internet connection gets cheaper with time anyway though.

[@Mezurashii5]

William Tael And it has little to no relevance to the topic, since the selling point is "off the shelf LED" utilization in data transfer. Do normal light cells work with those kinds of waves anyway?

[@pH7oslo]

What's new about this isn't the use of light to transfer information, it's making solar cell panels dual-purpose. The energy collected from the signal light source will be only a fraction of the energy needed to power the source, so it isn't really reducing the energy consumption. However, production and shipping consumes a lot of energy so multi-purpose items may well lead to significant reductions in energy consumption. Ambient light will also be utilized, of course, but the higher the energy of the ambient light the higher the energy of the light signal must be, which limits the net effect. It would make sense to use it for data transfer whenever the ambient light is low (like at night or when overcast). As for it being "only one way and therefor useless", that's like saying talking is useless because you can't hear with your mouth. Once data can be transfered, using a transmitter and a receiver, it's trivial to set up full duplex communication - you just set up a transmitter and a receiver on both ends. This technology is quite easy to interrupt, though, or stage "Man in the middle" attacks. As you may have noticed, the "fog" didn't stop the video transmission, but made it choppy as not enough data could be received. Since it's not just the amount of light reaching the solar panel, but the difference in strength between the signal and the ambient light, it can also be interrupted/reduced by adding (ambient) light. Just shining a flash light on the solar panel might be enough to severely disrupt the service. Or, you could use another transmitter with a significantly higher energy output to "replace" the data being received. This technology may have its uses, and it's good that people are thinking outside the box, but with so many other things, it may take a while until it becomes "consumer ready" - if it ever does. Who knows, perhaps it'll serve as an inspiration to something else that's more practical. Either way, it's a step in the right direction, and a needed reminder that information sharing on a global scale does come with a high energy cost. I wonder how much energy we'd save if people didn't comment on YT videos like I've just done..

[@666Tomato666]

so instead of a router in every house you need a router in every room! who sponsored him? Netgear?

[@DSBrekus]

+666Tomato666 Do you not already have lights in every room in your house?

[@666Tomato666]

Burgled I don't keep them on all the time

[@Cronuz2]

+Burgled He has lights, but he needs to add receivers in every room as well.

[@drdrsh]

+666Tomato666 I guess that the system can transmit data using very dim light so it can "mimic" switching off the light but still transmitting data.

[@666Tomato666]

Mostafa Muhammad that's not what he showed....

[@Leitilumo]

Finally, TED is TED again...

[@chandlerbing7269]

lol he has such a strong german accent.

[@Bram06]

+chandlerbing well, looking at his name, he _might_ be german. just a complete guess tho

[@kemi7689]

But you prefer an American one, right? 😉

[@chandlerbing7269]

Bram42 Harald lolol

[@xihangyang]

+Bram42 it is dutch. haas mean bunny.

[@Bram06]

xihang yang I know, i *am* Dutch xD his ancestors were probably Dutch, giving him that surname

[@monim67]

Internet is a 2-way communication, this is a one way transfer. How my laptop is going to send google the name of the video I typed on the search bar? This demo is based on UDP packets, what about TCP?

[@sajedaalazzam1067]

munim munna Can you help me? I would like to know what tools and equipment I need to design this circuit. I would like to know the names of the pieces and their numbers.

[@monim67]

I am afraid I have no knowledge of electronic circuits and how this circuit works. I only have little knowledge of basic socket protocols TCP/UDP. I think you can find them pretty easily, but you need to consult both electronic and networking person.

[@elmirelmir842]

If you want to send data with this technology you have to have a agreement with the Sun.

[@gramzrahindustries3139]

😂 😂 😂 😂 okay 👌

[@piyushaggarwal7698]

Internet is a 2 way communication. How will you upload. Also, during day (sunlight) how is disturbance by variation in solar brightness is rejected.

[@AB-ew3fd]

Good talk, horrendous title. This has nothing to do with WiFi...

[@whitewolf0487]

My main question is how distortion of the transmitted light will affect received data, and also how practical this would be in terms of light pollution. Not only this, but how effective it is with conflicting light sources, especially bright daylight

[@Nico-pl6sf]

Very likely ML algorithms could effectively adjust for distortions etc

[@edmundkemper1625]

Bright daylight can easily be eliminated as they will just be reflected as a constant dc noise in the receiver

[@tahaistheboss98]

what's the point? it feels like energy wasted

[@WBlake01]

*energy gained You're making people put solar panels on everything

[@TheHurby]

Solar panels aren't 100% efficient. You're still losing energy.

[@tahaistheboss98]

Trippy Tall i dont think you understood me, in order to send light signals you'd have to spend more energy than you gain, its basic principles in physics. So by just using a cable, it'll probably be cheaper by the time. Because these lights needs to be really strong, which makes them easy to be broken. solar power is always important to have anywhere in my opinion

[@WBlake01]

Taha Ragheed He didn't say anything about the light having to be of a specific type or intensity... So dismissing what you're saying about the lights having a tendency to break(?) So this is the point I want to make: There are lights everywhere, if they're already on anyway, it doesn't take more energy to transmit the data through the light that is already avaliable than by running a separate device for wifi. Right? On top of that, you have the solar panel on your laptop, harvesting extra power. It can harvest this power when you're not using it, too. Isn't this a net gain?

[@tahaistheboss98]

Trippy Tall I was just confused, it looks cool though

[@firdhousr]

This technology can be used to interconnect towers instead of fiber optic cables. The same further can be used to communicate within a campus where the wife range is not enough to cover the area by making LAN switches (wireless).

[@sajedaalazzam1067]

Systems Academy Can you help me? I would like to know what tools and equipment I need to design this circuit. I would like to know the names of the pieces and their numbers.

[@jnanalathaapujar3965]

Forget 2015.... This is 2019 We still use WIFI.. Lol..😂😂

[@404Great]

😄 yeah

[@hfantilagajr]

wow if this technology will be materialized in the near future it will solve slow internet connectivity and no one will be leaf behind in terms of fast paced data transmittal with the speed of light connectivity everyone can access the internet irregardless of their location or wherever they're may be in the world.thank you and Good luck Mr Haas and your team.

[@AnimeSummit]

Now what is the actual real world application?

[@kianheus2487]

Replaces Wi-Fi while harvesting energy... Duh

[@AnimeSummit]

Kian Heus I mean the specifics. Range, usage, power consumption, efficiency. Can it handle multiple simultaneous transmissions? Real world application is "We have this internet broadcasting light here, and it provides internet access to this whole village via lifi, while not causing light pollution and takes almost no energy to run." and even more details. Yes, you can transmit data over light, but how will you apply it.

[@woodgrain816]

The internet is usually a 2 way connection. Especially TCP to sync and acknowledge you received the packet. UDP is like a one way transfer, but that would be like broadcasting a TV channel to everyone. No stop, no rewind. if you lose a packet, it is skipped over. What about night time? It sounds useful for sending radio and TV broadcasts, but not the internet unless each person can beam a laser back and have a separate dedicated connection. Might as well use infrared, microwaves, lasers, or just 4G. I don't get it.

[@AnimeSummit]

***** Did you? Where did he ever mention simultaneous data streams, light pollution, or range?

[@Haskellerz]

+Anime Summit Phone to Phone short distance high speed transfer? Just attach a solar panel to any phone and use camera flash to signal.

[@islanderpei8439]

how to avoid the light disturbing from other light sources? if the light scouses for lighting purposes does not interfere the Li-Fi signal, what if the solar cell is exposed in more than one Li-Fi signal sources?

[@TheGregGeek]

I WANT IT NOW!

[@JD-fb3tg]

I feel like there are many devices hooked up to one wifi router but only one device can receive data from this, also if someone wanted to see what data is being downloaded (also might i reiterate no upload capable) this would be relatively easy without the need for a password

[@LTD-7]

*HEY 2015, ITS 2019 AND HOWS THAT Li-Fi WORKING OUT FOR YOU*

[@RealFemale69]

You want to just download? This is for people in poor countries like Uganda too download information

[@TheaDragonSpirit]

I thought this was LIFI: "Create a box with puts out a light formation a bit like a TV screen, at frequencies we can't see, then use little mirrors and periscope to send that image on to a mirror in each room. For different connections simply have multiple pictures and set the device to only display picture one or picture two. This would be instant and the only flaw I see is that if something blocks line of sight. So simple use a tiny disco like globe and have multiple reflections to read from, the device checks multiple images for the most consistent pattern. Kind of like Spot the error. Fuzzy logic. Basically a camera would look at the light formation and there you have it. Basically you reflect the celling from the box room at a certain angle, and reflect the celling from the other room at a certain angle, put a picture with outgoing picture 1, and the computer has a camera which receives and sends light out. Just saying picture one. This way it's pretty much light speed." You should be able to get the idea from this.

[@remkye]

I wonder what kind of image the sun would transmit to the laptop, im very curious now

[@pepe-perez]

noise probably

[@ForeverForys]

Maybe Advanced Alien civilizations have been trying to communicate with us via light for centuries and we will now be able to detect and decipher this communication? :-) (of maybe we could upgrade OUR communications into space using light instead of the current radio frequencies).

[@livingsoul697]

Remkye Henriquez static

[@KensanOni]

I am skeptical that this will actually create two way communication. It can replace tv cable, and it can remote things, maybe, depending on a few factors (and in that case, remote control of cars could be completely frightening), but that's not what the internet really is about. Without Two Way communication, this is just a fancy remote.

[@AndrewTSq]

Lifi = Fancier name for what your remote control uses, and what many devices used to communicate like 20-30 years ago, and did not really work that great back t hen since you have so many interferences that emits IR light.... (and that made it really slow in real life... but I guess in theory its always superfast. speed of light!) I dont see the use of this since Wifi is supieriour in every way.

[@ishortsclips]

So does this mechanism display what video will be generated from the sun rays?

[@honeystuckle]

Yooooooo posted on my birthday B) I feel special :)

[@samal3196]

+Rinn Deiman Happy birthday matey

[@saeedmatar2291]

happy b-day !

[@JesusRuiz-gf8gv]

+Rinn Deiman happy b-day man

[@NavarreAnthony]

+Rinn Deiman happy bday

[@wmarzan8130]

+Rinn Deiman Happy Birthday!! Have a good one! :)

[@SKRamizAli797]

But the light coming from the sun is not fluctuating light, right? So how we can get data or a video transmission from sunlight by solar panels?

[@ultraad4780]

they said to use a lazer rather than light in broad daylight, as other sources of light would interfere

[@julesprince3639]

Can we all just upload our consciousness to a fucking computer already? I'm tired of all the steps in between..

[@hacker-7214]

+Punk Apple Patience...

[@averagetoad2802]

Jules Prince if the computer breaks your dead and if you upload it to the internet you can also get hacked unless you use quantum internet which is in development.

[@johnjohns8129]

Jules Prince what is consciousness really? and dont give the socio-idealistic drivel. give a concrete toolable explanation of WHAT CONSCIOUNESS IS.

[@hilmiko1]

please stop the negative.. THIS IS AN IDEA FOR HUMANITY! HARVEST AND LETS TAKE THE OPPORTUNITY FROM IT. SUPPORT THEM SO THAT IT CAN OVERCOME EVERY OBSTACLE THERE IS

[@jero3933]

Frst of all hi fi then wi fi nd then li fi

[@yaral.4496]

To Turbo Trickster: LOL :-)

[@muslix1147]

Turbo Trickster You forgot Si-fi. 😀

[@coachjoachimroomaney793]

What next, di fi

[@spacebatstuckonearth8888]

No-Mo-Fi is next its time to end all the Fi Fis

[@gmborromeo]

Add Sci Fi to that...;)

[@TrueWordinSeason]

Why didn't he transmit another video because that solar panel itself can serve as a semiconductor switch or remote to pause and play that video used as a demonstration

[@jero3933]

Skynet wrning ...run run

[@blackdynamite58]

Nw C-king 2 con troll everything

[@wsj1983]

It makes no sense to me. Visible light is a form of wave as much as radiowaves. The diference I see from this metod to the usual wifi is that you are now wasting energy with low frequency visible waves. If you want to save energy and use this energy to charge a battery with this metod, you can do the same with the regular wi-fi. You can focus it (as a laser). You can use this energy to recharge and not only to receive data. Did I missunderstood the idea?

[@drabberfrog]

Lol this never happened

[@sebastian-benedictflore]

This is great but I'm not sure how useful it can be. We can't use visible light like we use radiowaves because it gets blocked too easily. I mean, you can't replace a WiFi modem with an LED lamp because it could only be used in one room.

[@nanNaan]

2019 no change .....¿

[@Cl0ne66]

When you stream hulu and netflix I'll be interested. Sorry but all that demonstration proved was that the light can run a gif. How do we know its actually streaming data?

[@reyflp]

Real gamers use lan cables !!! :3

[@yashramawat1063]

Haha

[@hudortunnel9784]

Reynaldo Lazaro lol but true

[@JodBronson]

100%

[@brandonhernandez7252]

Olddddd school!!

[@JodBronson]

@@brandonhernandez7252 - Ask why...... Idiot !!! 😂😂😂😂😂😂😂😂😂😂

[@mohammadmonishraza2332]

it's fine that lights can be used to transfer the signals replacing the existing invisible rays and wireless tower signal system but i find a great difficulty in thinking of modulating a meaningful signal on the light rays. like what I am asking is that, how can those simple light rays be used as meaningful signals?

[@djinitham696]

this video 2015?now 2018.where is li-fi in 2018?how to forget wi-fi?you want people die?

[@alonloewenstein8085]

Does this mean it can only be used during night, and that if we use street lights, only one kind of information (for example one video) can be transmitted?

[@baustinmcmanus1991]

15mb/s is faster than most broadband connections? Horseshit.

[@EnnyO_Lobby]

+Baustin McManus *50

[@SikstepMusic]

50*

[@akzebraminer]

Baustin McManus 50 mbps not 15

[@Yaxqb]

It's such a subtle data transfer mechanism, imagine turning on the lights and then leaking all your sensitive data to ur neighbor, nice

[@ce-lz5jw]

50 megabits its nothing compare to google fiber 1000 megabits

[@ce-lz5jw]

+Potatoes gonna potate he is just advertising the product which i consider nonsense, people just wouldnt change wifi

[@Bauks]

+Cristobal Elorza When I first hopped on the internet back in 95 I only had a 56k modem it went to 128k etc.. over the years... But I'm sure 50mbps would be a huge change to someone with 0mbps right now lol....

[@tairikuokami]

+Cristobal Elorza The record for Li-Fi is 224 gigabits per second.

[@janvierma]

In another vidoe he talks of 50-200 GB NOT mg

[@vincebellisano1347]

Rain, snow storms li-fi will be tough.

[@icetruth]

Bright minds, makes life simple and safe for all.

[@adisuyash]

Brilliant

[@sirpascal7491]

and i was forgeting one thing, there's the sun. i think the data transimmited to a solar panel on your rooftop can be disrupted when the sun is also transmitting its own light on the same panel. and also another limitation, rain will refract the light, and again, can laser be read by a solar panel? am jst asking coz am not sure

[@jackkitchener1216]

This would only work to receive data via UDP i.e. stream video as there is no way to upload data, you can't even make requests or verify packets like you can with TCP = very limited usage.

[@AlexandarValerian]

He didn't talk about the speed potential of the data being transferred. Also, extensive testing needs to be done to verify that the light oscillation or flickering doesn't cause epileptic attacks, nervous mood or fatigue in people.