How Blue LEDs Changed the World

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Not only are small, energy efficient LEDs used in almost every piece of modern electronics, they have the greatest potential impact on energy savings globally. But LEDs didn't have much use until the '90s, when Japanese scientists discovered the missing link needed to complete the color spectrum: The blue LED.
Video by Robin Fall
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Опубликовано:

25 окт 2024

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Комментарии : 1,9 тыс.

@BakrAli10 8 месяцев назад

Watching Veritasium's recent video gave me a new appreciation for the blue LED's invention, even though I had seen this video earlier.

@sumuduranathunga 8 месяцев назад

While I'm watching it, this is suggested

@islowclick 8 месяцев назад

@@sumuduranathungaSame

@rickintexas1584 8 месяцев назад

Me too. I saw the Nobel Prize award and read an article on it, but didn’t fully appreciate it until Veritasium’s lengthy video.

@matttheking1655 8 месяцев назад

Nakamura really changed the world!

@rz6354 8 месяцев назад

👍

@BLUEGENE13 5 лет назад

i hate it when they show cooling towers as if they are pollution, THAT'S STEAMM!!!!

@matthew8153 5 лет назад

BLUEGENE13 Growing up we called them cloud makers.

@dylan8736 5 лет назад

Huge Vape Pipe.

@lawrencepatrick2486 5 лет назад

Couldn't agree more. Somehow it's the poster child for anything bad.

@JACKRAIDEN97 5 лет назад

Mega bong

@acerlmt 5 лет назад

5:04 it's appears when he says about global warming!! Are you deaf?! -__-

@dasboot5903 5 лет назад

My full respect, to this Japanese scientist, who spent a lot of his life, to develop and produce BLUE LED !!!! Amen.

@tanzaniteblueeye4805 4 года назад

Yes and now check here on youtube ;Beware the bluebeam!!!

@iancrossley6637 4 года назад

I'd guess he earned his PHD. Great job Shuji!

@unholy1771 4 года назад

The video was treating him unfairly. Belittling his person and attributing the achievement to everything except the man's brilliance

@kezziekz 4 года назад

Amen

@atheisthuman8108 7 месяцев назад

His net worth is $1.3 million as of 2024! What a humble man who literally saved the planet!

@michaelmelling9333 5 лет назад

Fascinating. I'm glad he got the Nobel Prize for his wonderful contribution.

@8nayrb 5 лет назад

split 3 ways and Nichia holds the patents so $333k for changing the world, as they say.

@8460437 5 лет назад

So I assume he got his PhD.

@obelic71 5 лет назад

@@8460437 who cares he has a nobelprize, that opens more doors 😉

@ktolwal 5 лет назад

@Blind Squid u r a blither ing idiot

@deem3365 5 лет назад

i think pollution is the last thing on people's mind if they are burning wood for light

@dust7962 5 лет назад

@Angel Guerra Yeah most if their country is cold and frozen. Global warming doesn't really seem like a bad idea to the Russians

@biplav32 5 лет назад

@@dust7962 It will open up the arctic for them to drill.

@mintar59 5 лет назад

Yeah but think of the health impacts of the smoke their fires must have. Less pollution because of fire-> fewer health problems -> more time and resources to go ahead and improve your country.

@mr2octavio 5 лет назад

@Angel Guerra that's the most ignorant thing I've ever read, and if you are from the US take a look at your president stepping down from the Paris Accords for climate change

@jmcenanly1 5 лет назад

If you have a choice between cleanly shining LEDs or something that produces smoke and soot, you'd go with the LEDs.

@CE0626 5 лет назад

1:54 “They don’t get hot.” -- It should be they don’t get as hot.

@smorrow 5 лет назад

Yeah, somebody post that DIY Perks video.

@Albanez39 5 лет назад

It has a different kind of hot. The heat is not produced by an incandescent filament, but by the electric current flowing in the wires and boards it uses to convert the voltage, amperage and so on. It might seem like the same thing, but it is not. The heat in incandescent lights is produced intentionally, because no heat = no light.

@OutdoorLCD 5 лет назад

@@Albanez39 different type? Are you sure? The heat can be controlled thru heat sinking better, but same heat.

@user-neo71665 5 лет назад

@@Albanez39 Heat is heat. The process that causes it might be different ( radiation, convection, conduction) but at the end of the day the heat caused is the exact same type of high temperature known as heat.

@MrGom3zone 5 лет назад

He told the bulbs to settle down before they become overly angry.

@smitajky 5 лет назад

50 years ago I replaced all my lights with fluorescent ones. It saved 80% on the lighting costs and it improved the lighting simultaneously. A few years ago I replaced most of those with LED devices of different types. This halved the lighting costs again. The BIGGEST saving is that they don't object to being switched on and off so that many more rooms are left without light unless it is actually needed. Then there is the power saving on the TV and computer screens. A wonderful improvement to the quality of life and an improvement in efficiency simultaneously.

@PlanetIscandar 2 года назад

Thank you for your joke "it improved the lighting". As for the supposed saving.. it's a long story...

@thatsawesome2060 8 месяцев назад

Similar to me except every time I get savings not long after the energy company increase their rate, I think I am looking to solar

@BeardofBeesPool 13 дней назад

@PlanetIscandar What's the joke? The 150 watt equivalent led bulb I have is just as bright as the old CFL ones.

@spokev 5 лет назад

Edison did not "invent" the light bulb. He perfected it and the vacuum pump necessary to remove the air from them.

@electronresonator8882 5 лет назад

he did, the same way Elon Musk didn't invented all technology on Tesla cars, but got all the credit for it

@AUXdrone 5 лет назад

Edison’s employees perfected it.

@spokev 5 лет назад

True, and more to the point,@@AUXdrone

@susancorgi 5 лет назад

Besides, Edison was an asshole. He killed many big animals just to get rid of his competitor, Tesla. I've heard.

@dissonanceparadiddle 5 лет назад

His team of engineers perfected the design only for him to have them engineer a version that wouldn't last indefinitely like they could have. You gotta remember follow the money.

@anshulmishra5521 5 лет назад

Wow! Kudos to all the Japanese scientists who made LEDs so much more practical and usable.

@PlanetIscandar 2 года назад

So, there are still some people who believe in fairy tales as light bulbs don't last long and LEDs don't get hot and are supposedly harmless. At least they do know how harmful fluorescent lights are, which was the supposed clean solution that replaced the healthy light bulbs with their natural and truly harmless light. Fortunately, i have a large stock of traditional and ecological light bulbs that will provide me with healthy light for another 20 years.

@NolandC Год назад

if LED save energy. why is my elecritcity bill the same as when as I had incandescent bulbs?

@ramakrishna7534 11 месяцев назад

@anthonycedricnavalta6726 8 месяцев назад

@@NolandC inflation

@NolandC 8 месяцев назад

@@anthonycedricnavalta6726 More like greed.

@britzwickit 5 лет назад

thank you for this video. Mr. Nakamura is exactly the kind of person we all should celebrate.

@WilliamWynn 5 лет назад

His invention was great for humanity, he's kind of an ass as a person though.

@soaringvulture 5 лет назад

@@WilliamWynn I'll take it. I hear Frank Sinatra wasn't a nice guy either. But the boy could sing.

@MrLiptonappletea93 5 лет назад

Don’t forget Akasaki and Amano. They came up with the GaN to create blue LEDs first. Nakamura came up with different techniques to create better quality blue LEDs after they published their results.

@desiguy55 8 месяцев назад

yes those two did but with a tiniest fraction turning into blue light their research came to a dead end. it was Nakamurás brilliant research and technique that made the blue led a thousand times more bright that saved the day and revolutionized the led industry. despite huge opposition into his research from his own company. yet his own companies made billions while giving him a 77K reward a for all his work.@@MrLiptonappletea93

@johnfordice5763 5 лет назад

Why do these sorts of videos always include nuclear cooling towers in the montage of high greenhouse emission activities?? Nuclear is FAR better for the environment than coal and nat gas.

@kanderson5555 5 лет назад

Cooling towers are used in all thermal power plants. That style of cooling tower is usually associated with nuclear plants because the design is more modern and expensive so its only used with newer and expensive tech like nuclear or "clean" coal plants The shot of the cooling towers is probably a coal plant as I think there are ramps leading up in the main buildings, those would be the conveyer belts feeding the furnace with coal.

@johnfordice5763 5 лет назад

@@kanderson5555 I didn't know that! I always associated tall narrow stacks with coal cooling towers. Thanks!

@ketch7420 5 лет назад

These nuclear towers emit water vapor though?

@pierreuntel1970 5 лет назад

Because it have a large "smoke" emission which will make people think it's bad so they could protest against it

@ketch7420 5 лет назад

@@pierreuntel1970 They believe everything they see?

@GoingtoHecq 5 лет назад

The fact that you credit edison with the lightbulb already speaks to the quality of your research and information.

@Netlogic. 5 лет назад

Wikipedia plus whatever he can remember from highschool and some old TLC documentaries, all thrown in a blender

@totalgej 5 лет назад

Edison patented lightbulb. Also funded lots of the research for it. So if you want to credit anzone for the lightbulb, its Edison

@deanhall9292 5 лет назад

Yes Texas Instruments......those "Fathers of Electronics", getting PhDs for reverse engineering Roswell tech.... Science , was infiltrated by the Sicentific Lazarroni at Academy of Sciences to rebutt Darwinism......but transistors,slicon chps, led's,fibre optics,lasers?......ask MJ12.(Detlev Bronk)

@millimike 4 года назад

When it is said that Thomas Edison created the light bulb what is meant is that he created the incadescant bulb that is still used today. It was the first commercially viable option. That is why he is credited with creating the light bulb because it was the first bulb available to everyone

@JamesSmith-dn8lb 5 лет назад

"when Thomas Edison invented the lightbulb" Ah. So this is a video of fiction.

@atank 5 лет назад

they also stated "global warming"

@johnlamarca9439 5 лет назад

You are correct, but most people are not aware of Teslar and the truth... They were taught fake news history... But it is not fair to call this a fiction video... You can examine the content of almost any work and find a false fact in it...

@macmaniacal 5 лет назад

@@johnlamarca9439 why is it so easy to see the flaws?

@darryljones3009 5 лет назад

@@johnlamarca9439 It wasn't Tesla he stole it from, it was Joseph Swan.

@effiodiego 5 лет назад

@@atank Oh I think you're confused. That part was true.

@mrt1r 5 лет назад

"...and with global warming due to Human activity creating catastrophic effects on the planet..." *Shows nuclear power plant which produces steam* 🤦‍♂️

@Gnometower 5 лет назад

It's a coal power plant.

@davidgrover5996 5 лет назад

Gnometower, Those are cooling towers what is coming out the top is water vapor/steam.

@Gnometower 5 лет назад

@@davidgrover5996 Yes I know. It's not a nuclear power plant though.

@se7en518 5 лет назад

and nuclear waste 🤦‍♂️

@michaeltaylors2456 5 лет назад

Se7en .. don’t worry , ask Galen Windsor

@TheAnalogKid2 5 лет назад

"all the best stuff is made in Japan." - marty mcfly

@ezioauditore5616 5 лет назад

someone who watched that movie, and for me thats the best movie

@spectre5757 5 лет назад

Anime

@DjJooze 5 лет назад

Made in China ®

@joshuabrown4858 5 лет назад

That yota boi

@jannadrielcervo7753 5 лет назад

Japan!? Great Scott! - Doc

@zejalt8608 5 лет назад

That technology really came out of the blue. Those guys led the research quite well. Japan has some bright minds indeed.

@AnonYmous-kt8hi 5 лет назад

agreed.. really illuminates the full spectrum of uses for LEDs.

@campkira 5 лет назад

It been a while since the research for blue light...

@alexdiezg 5 лет назад

3 sentences, 3 puns. Amazing.

@deepstariaenigmatica2601 4 года назад

@@alexdiezg mYbe 1 but how 3?

@alexdiezg 4 года назад

@@deepstariaenigmatica2601 blue, led & bright

@fjw-AT5145 8 месяцев назад

"Incandescent lights don't last long". Biggest understatement of the day. I don't miss my weekly routine of goung around the house changing light bulbs. And it was also dangerous as those bulbs were super fragile. LED lights are a win win technology. Best thing since sliced bread. Thank you Japanese scientist Nakamura.

@tyguy104 7 месяцев назад

Exactly! I mean, incandescents; well I think we both know the fluorescents already defeated the incandescents anyway. Now the LEDs are defeating the fluroescents? Incandescents are a fossil of a light now anyway.

@galfisk 5 лет назад

Should've included a comment as to how having a blue LED enables full spectrum lighting. For those curious: blue light is used to stimulate a yellow phosphor, and the combined light can be tuned to any color temperature of white.

@loopje Год назад

they did…

@r3dp1ll 5 лет назад

also Edison didn't invent the lightbulb. His team improved on it.

@pawneko5248 5 лет назад

He business man he sucking di i mean money.

@Albanez39 5 лет назад

Same for the film camera, telephone and dozens of other inventions that people credit him for. He was just a businessmen that was able to deceive his scientists and inventors into signing contracts that forced them to renounce to the credit of their inventions...

@electronresonator8882 5 лет назад

do you think Elon Musk invented all technology on Tesla cars and spaceX?, then why people keep calling Elon as genius?

@yt-sh 5 лет назад

@@electronresonator8882 Because he manages 3 global level companies while reviewning memes

@avid0g 5 лет назад

@@electronresonator8882 Because he privately funded Tesla as a startup and personallypl brought in the man that advanced the 18650 cell into a safe vehicle battery.

@Future_Ancient 5 лет назад

Just wanted to point out that the massive 'chimneys' are actually cooling stacks, they don't emit pollutants :)

@cleveland2286 5 лет назад

Yeah I hate it when thats used to represent pollution, It's just steam which is something most people don't know

@helcurt2509 5 лет назад

The "steam" or hot water vapour aren't as harmless as they seem. Yeah they might not be pollutants but they do contribute to heating of environment, raising atmospheric temperature around.

@paulanderson79 5 лет назад

@@helcurt2509 What do you suggest we do instead? We can't just switch of the world's power grids.

@sparky1331 5 лет назад

@@paulanderson79 North Korea Will Switch Off Our Power Grid.

@paulanderson79 5 лет назад

@@sparky1331 No it won't. KJU doesn't have thermonuclear weapons. Nor does anyone else in my opinion. The physics of (hydrogen) fusion bombs just doesn't stack up for me. To be honest the biggest terrorist target in any country is the water supply. That has to be open to the sky.

@saadman920 4 года назад

"LEDs dont get hot like incandescent light." 100W LED Chip: Hold my heatsink.

@chrisbraid2907 4 года назад

They don’t, they get hot like LEDs. Cob lights are notoriously hot when running bright ....

@badlongon525 2 месяца назад

Thank you Mr. Nakamura for not letting up against the pressure and temptation of giving up. 😊

@patrickm5217 5 лет назад

Fascinating video. Most people including myself never question where technology comes from. We just walk into a store and buy products, electronics take hundreds of hours to develop & build

@dijoxx 5 лет назад

More like hundreds of thousands

@robertpryor7225 5 лет назад

More more like fractions of millions

@prashanthb6521 5 лет назад

Excellent ! The world owes the scientists a big thank you.

@macsnafu 5 лет назад

I didn't know that creating blue LEDs had been so difficult. But clearly, you'd need all three primary colors to generate full-color displays.

@esheel826 5 лет назад

When Edison stole the light bulb

@Albanez39 5 лет назад

And the film camera, and the telephone, and lots of other things.

@electronresonator8882 5 лет назад

he saw the opportunity just like Steve Jobs

@my3dviews 5 лет назад

@@Albanez39 The telephone was invented by Alexander Graham Bell. Edison never claimed to have invented that.

@arthar8435 5 лет назад

nikola tesla

@Albanez39 5 лет назад

@@my3dviews His scientists improved the clarity by using a carbon microphone. I've seen others online credit Edison for all kinds of things, even the telephone.

@Andy-df5fj 5 лет назад

LED bulbs don't last 25 times longer even though the LEDs themselves theoretically could. The internal circuitry in LED bulbs that convert the line voltage burn out long before the LEDs do and sometimes even faster than an incandescent bulb.

@Gazgit555 5 лет назад

thats why led's are run on alot less current than they can .then they can run for ages .theres also flip chips that has no bonding wire

@Kpopzoom 5 лет назад

Usually the Capacitors in the power supplies blow first especially in the cheap ones.

@westelaudio943 5 лет назад

Most room lighting LED bulbs fail after 2-5 years due to bond wire problems, they crack from thermal expansion and contraction. Not the internal curcuitry. Indicator LEDs with low power can last extremely long though.

@yadunandanks8781 5 лет назад

Yeah the cheaper ones!!

@Kpopzoom 5 лет назад

If an LEDs temperature goes over 90deg they can suffer degradation which results in a lower light output.

@RedwoodGeorge 5 лет назад

It's unfortunate that they left out the most important part of what makes a "white" LED. This video seems to imply that you need three LEDs - Red, Green and Blue to make white light but in truth almost no white LED works this way. Instead, white LEDs are very similar to fluorescent tube lights. A short wavelength blue or near-UV LED is surrounded with a phosphor that absorbs most of the blue light and readmits is across multiple wavelengths, creating a rather broad, flat spectrum of light. Fluorescent tubes work largely the same way: mercury is stimulated to emit UV light which is then absorbed by the phosphors coating the inside of the glass tube, emitting a broader white(ish) light.

@Abitibidoug 8 месяцев назад

I thought the same thing. Do those near UV LEDs also use gallium nitride?

@Stefan_Van_pellicom 5 лет назад

Interesting documentary! But don’t use cooling towers as an illustration of pollution : it’s just plain clouds coming out of them ...

@acerlmt 5 лет назад

it's appears when he says about global warming!! Are you deaf?! -__-

@curtisbarkes6271 5 лет назад

LOL! You said, "just plain clouds"!! That's the best explanation of steam from a cooling tower. EVER!!

@fitzmorrispr 5 лет назад

Alex Nevi ...and that's better? How, exactly? Nuclear energy is not a contributor to global warming either.

@se7en518 5 лет назад

@@fitzmorrispr Because only Nuclear Energy uses cooling towers...

@ianzenda5944 5 лет назад

Se7en the cooling towers aren’t the problem on coal plants either, the problem with coal plants is the other towers spewing toxic smoke out of the tops from burning coal

@johnlamarca9439 5 лет назад

Why is it I never heard of this man and his involvement in inventing the LED bulbs? I remember over 30 years ago trying to tell people about them and the first time I bought one from Ccraine company in Fortuna California... I paid over twelve dollars for a flashlight you can get now for 99 cents anywhere... Someone should write something about this invention...

@Gazgit555 5 лет назад

ONE MISTAKE ,LED'S DO GET HOT

@lsudan2670 5 лет назад

depends on circumstances....

@Detroit8V92tta 5 лет назад

@@lsudan2670 no they get hot under any circumstances. Light is heat.

@lsudan2670 5 лет назад

@@Detroit8V92tta ok I give up 😉

@Detroit8V92tta 5 лет назад

@@lsudan2670 never give up. 👍

@darrenchriest300 5 лет назад

One mistake? There were dozens of instances of false information and glaring inaccuracies in this video.

@defencebangladesh4068 5 лет назад

Showing Cooling Tower as Toxic... lol

@jetso2000 5 лет назад

Water vapor contributes to climate change

@richardhead8264 5 лет назад

@@jetso2000 Yup, it makes rain.

@mkg2002 5 лет назад

The vapor contributes to greenhouse gas dude. The excessive heat is released in a huge scale to the atmosphere

@qyahb3822 5 лет назад

You dont know what you are talking about, it exposed your stupidity

@9adrda 5 лет назад

5:03 that's condensation, not pollution... stop making nuclear something bad, when it's clearly it one of the best clean energy sources

@yeahnoway111 5 лет назад

that was actually a coal plant not nuclear

@9adrda 5 лет назад

My bad! I should've seen this! Thanks for mentioning it.

@Ddub1083 4 года назад

He didnt say anything about "pollution" he was talking about greenhouse gasses.... water vapor is the largest contributor to greenhouse gasses. Come back when you know what youre talking about.

@anonykip 5 лет назад

This video went into great detail on how the blue LED was invented and spent 30 seconds telling how it actually changed the world.

@BaghaShams 5 лет назад

I remember when the blue LED was first invented. Within a couple years every settop device had these annoyingly bright blue lights, and excessive numbers of them.

@nitishthakur9208 2 года назад

First one actual blue led is very costly and even today maximum blue led is not actual they are generated from color mixing

@campos3452 5 лет назад

Thank you Japan 🇯🇵 🙏🏼

@Rax666Quintanilla 3 года назад

Hi there! I understand that in the end of the video, it was focused on showing the environmental effect of migrating to LED in the developing countries. But it also should have been mentioned that a lot of people die for burning wood or coal inside their homes. I think the impact of saving those lives has an important impact too.

@Abitibidoug 8 месяцев назад

Plus they don't have to gather wood for those LED lights.

@Alpha-lm5vd 8 месяцев назад

Came here from Veritasium

@ayceu 8 месяцев назад

After watching the Veritasium video it felt like this video was treating Nakamura unfairly.

@IceColdProfessional 5 лет назад

I love LED light. I think it's wonderful.

@riel1674 5 лет назад

Blue da ba dee truly had an impact

@knockhello2604 5 лет назад

@krashd 5 лет назад

I am blue da ba dee, I am blue L E D..

@marcelogouveia9614 5 лет назад

I recall when the first "Blue LEDs were out", as a pilot I thought the missing color for the airport's taxiway lights... currently LEDs are used in approach light systems, runways and taxiways. LEDs are cool ;)

@Tshizzle42o 5 лет назад

Anyone ever notice that the bright blue ones for christmas lights look blurry or out of focus when they are on. Especially in the dark.

@GRAHAMAUS 5 лет назад

That's your eyes' chromatic aberration causing that.

@paulanderson79 5 лет назад

@@GRAHAMAUS Correct. The blue receptors are apparently further 'back' on the retina which means the blue light focuses less reliably.

@soaringvulture 5 лет назад

That's just you dude. Stay off the eggnog.

@paulanderson79 5 лет назад

@@soaringvulture genuinely, there is an anatomical reason for this. I believe as well that the blue receptors only make up about ten percent of the total.

@makeitwithpam2795 5 месяцев назад

People have trouble focusing on deep blue stained glass as well.

@user-jt3nf7in5w 5 лет назад

I’ve been using nichia component leds for years and had no idea of their history.... thanks for the video

@justinxu1642 5 лет назад

That Japanese Scientist Prof. Nakamura is from UCSB, where I graduated from!!! So proud of my Alma Mater! Hail UCSB!!!

@mindhormone 5 лет назад

Hail Hydra!

@mohitrahaman Год назад

Back in 2014, I was quite surprised to know someone was awarded a Nobel prize for inventing blue LEDs! I had this idea that, that tech was already age old or must have flown under the radar of the committee for the late recognition.

@zephyr-ca 5 лет назад

5:04 - Talking about global warming, shows water vapour and not any sort of pollutant.

@samuelthornton9179 5 лет назад

It a coal power station not nuclear

@V1Pin 5 лет назад

Water vapor is classified as a green house gas!

@V1Pin 5 лет назад

@Sir Hoodie stop adding to it .

@V1Pin 5 лет назад

@Sir Hoodie Don't increase green house gases . Green house gases contribute to global warming and climate change. Imminent doom. Solution: dont add to the green house gases.

@V1Pin 5 лет назад

@Sir Hoodie why? you cannot put 2 and 2 together? Statement one : green house gases contribute to global warming. Statement two : water vapor is a green house gas. Oh no! Show me a study linking everything!!

@lander77477 8 месяцев назад

0:06 those are LCD screens. Not LED screens. They are simply backlit with LEDs but the LCD builds the picture. We need to end this misnaming of screens since it only causes confusion with genuine LED screens like the screens you see in sports stadiums or the new Las Vegas sphere which uses LED screens.

@pirchoo 5 лет назад

Guess I'm getting old, but could you please turn the music down, I can't listen! :D

@karthikvinod9425 7 месяцев назад

Great job linking the science with history!

@xanlord2k 5 лет назад

One thing you're wrong about is that LEDs didn't have use before the 90s. The disc storage formats are a result of LED technology

@whickervision742 5 лет назад

You're confusing lasers with LED's when talking about optical disc storage. But yes, visible LED's were used as indicator lights, signage, and darkroom lighting, to name a few uses, shortly after their invention.

@northyland1157 5 лет назад

Very smart comments on this video.. Glad to see people using their brains!

@rafterbarr1506 5 лет назад

More energy is wasted by the overuse of LED's. If we were talking about replacing every incandescent lightbulb with a LED one, that would save energy. LED's save energy, but the overuse of them for decorative, landscaping, and luxury purposes are defeating that purpose.

@jerryspann8713 5 лет назад

Including the standby LEDs on televisions, stereo receivers, and other electronic devices.

@HH-ti9dv 5 лет назад

A truly well deserved Nobel prize!!!

@RonakDhakan 5 лет назад

Smartphone, TVs, Computers, iPads. Pick the odd one out. iPad is a brand, not a device category.

@QoraxAudio 5 лет назад

Nice video, but three things: 1. LEDs can actually get hot, especially the high power LEDs, so the statement at 1:54 is just plainly wrong. 2. Try to sum up both the pros *AND* cons of LED lighting; especially photobiological effects of LEDs are noteworthy on the 'con side'. 3. The cooling towers of 5:04 have nothing to do with air pollution, since it's water vapor coming out.

@ikichullo 5 лет назад

0:50 "After Thomas Edison invented the lightbulb" Me: Okay bu-bye

@LuisCarlos-kp6jq 5 лет назад

they lost me at the same point...

@se7en518 5 лет назад

cool story bro

@AuH2O 5 лет назад

You won't be missed! Buh-bye you winy little Tesla-loving bitch!

@amatsolehin2526 8 месяцев назад

Literally changed the world

@puravida809 5 лет назад

EDISON DID NOT INVENT THE LIGHT BULB

@cmdrw9855 5 лет назад

Correct, he invented only the shape of the bulb

@CaedenV 5 лет назад

@@cmdrw9855 And putting it in a vacuum tube, and making it so they don't burn buildings down 100% of the time. I don't understand why people get so upset over this? Like most inventions, Edison took previous work and improved upon it, marketed it, and made it a 'normal' product. The idea that someone else should get credit for essentially putting an electrical fire in place of a gas lamp seems a bit silly.

@FUnzzies1 5 лет назад

@@CaedenV but have his engineers reeeeee

@jaymackers7322 5 лет назад

At 4:24 there is a photo of an iPhone (an older one) that uses an LCD not LED screen, otherwise, very interesting video and I am very happy to see those scientists got the recognition they deserved.

@splewy 5 лет назад

1:54 "LEDs don't get hot" - This isn't completely accurate. While older low power LEDs didn't get hot, modern high power LEDs get very hot, to the point where they will destroy themselves without proper thermal management devices like heat sinks. Thermal failure is actually the most common cause of premature failure for most modern LED fixtures.

@Rainbow__cookie 5 лет назад

Yeah bright leds get hot very Bright leds

@L1m3r 5 лет назад

It's not accurate at all. Older low power LEDs get even "hotter" in relative terms than modern ones because the were less efficient and converted more of the supplied energy to heat.

@splewy 5 лет назад

L1m3r I think they were probably referring to 5mm thru hole LED or low current SMDs that have existed for decades. Those are so low powered (Typically less than 0.1 watts) that they generated almost no heat. Those were only ever really used for indication or decorative purposes though, since their light output was minuscule. The more powerful modern LEDs that are being used to replace incandescent bulbs produce tons of heat.

@BigCityPalooka 5 лет назад

You can spot the youth of the reporter and his crew because none of them realized the TV graphic was upside down. :P But quibbles aside, this was a fabulous report and quite fascinating. I hope Bloomie makes more like it. Thanks, everybody! Cheers.

@ZAR556 5 лет назад

"Edison invented Lightbulb" , beg your pardon ?!

@artdonovandesign Месяц назад

A RICHLY deserved Nobel Prize for Dr. Nakamura! He changed the world for so much the better. And that is _not_ hyperbole.

@cruzmatt22 5 лет назад

Jokes on you, I already know the story of the blue led. Thanks LGR

@LGR 5 лет назад

👍

@deepstariaenigmatica2601 4 года назад

@@LGR username checks out lmao

@SuperAgentman007 8 месяцев назад

The one thing that damages incandescent lightbulbs is the turning on and turning off phase if the lightbulb with State on, it will remain on for years because in New York City in a fire station, there is a incandescent lightbulb that has been burning since 1905 and it still is going today and I believe there is a webpage and a web camera devoted to it😊

@TheUAVpilot 5 лет назад

They failed to mention that coating the blue led with phosphorus is what gives us the white light LEDs of today.

@whickervision742 5 лет назад

PHOSPHORS, not phosphorous.

@jensschroder8214 8 месяцев назад

The first blue LEDs available were based on SiC. But these were not efficient and did not have monochronous light. The GaN LEDs with 6 to 7 layers are much more complex, but emit the desired monochronous blue. GaN LEDs in green followed later.

@r3dp1ll 5 лет назад

Tablets not "ipads" please. Ipad is a brand

@matthew8153 5 лет назад

Becoming Vincent What can you expect from a video that presents “greenhouse gasses” as real?

@vj8452 5 лет назад

Matthew well, it is real.

@matthew8153 5 лет назад

Zenzler Um...no actually. The amount of carbon in the air is determined by the average temperature, not the other way around. And the temperature is controlled by the giant fusion reaction in the sky.

@RileyGoss 5 лет назад

@@matthew8153 This is a load of barnacles....

@tmded3368 5 лет назад

@@matthew8153 sources?

@gauribadukale2397 Год назад

Things we just take for granted had literal decades pun into it

@samson7383 5 лет назад

Edison didn't invent the lightbulb he bought the patent and perfected the filament

@nobunaga86 5 лет назад

Nice work Bloomberg, showing clean powered nuclear plants and adding the voice over of human pollution vai CO2.

@plushycatt 5 лет назад

this very blue light is known to increase strain on the eye, in case of the blue light being emitted from our smartphone displays. hence we use a yelowish blue-light filter. back to the basics!

@kercchan3307 5 лет назад

blue light also comes from the sun, without blue you cannot produce white light. I despise those sickly yellow dim bulbs

@zorkmid1083 5 лет назад

For LED bulbs and flashlights, you don't need red and green LEDs to create white light. What Nichia did to create the first white LED for lighting was to cover a (then) powerful blue LED with phosphors to convert much of the blue light to red and green. Red+green+blue=white. Even so, manufacturers didn't always get the formula exactly right, so many early "white" LEDs ended up with a bluish or greenish tint to them. This video is so incomplete.

@highvis_supply 5 лет назад

And now that there are 99 CRI LEDs, there is literally no reason not to switch

@AdvaitThakur 5 лет назад

Atleast here in Mumbai, India....Tungsten bulb lasts long than the new CFL and LED bulbs. The CFL led widely available here for years are cheap with short life. Seems Tungsten were built well. And people here are actually spending more on CFL led bulbs than the Tungsten to save electricity bills.

@sxyqt3.14 5 лет назад

5:04... why did you use nuclear power plants as a B reel for pollution? its fucking steam mate

@mclarenf45 5 лет назад

the blue light - which makes up awake the whole night !

@mrakvladar2034 5 лет назад

You said Edison invented the lightbulb now I have trouble believing the other things you have said.

@Tails92Halcmm 4 года назад

Many people worked on inventing the light bulb

@jimboTTT 5 лет назад

thanks guys for your effort :)

@capitan_camote_picante6370 5 лет назад

0:52 yeeez.. why do people keep thinking TD invented the light bulb?...

@samuelthornton9179 5 лет назад

It a converal subject and would need more time to explain it.

@jimsutton1179 5 лет назад

Great to hear about some of the people directly responsible for discovering how to get blue light from Gallium Nitride, also the interactions between the different people that struggled with how to make LED's a viable alternative to incandescent lighting. Thankful for their efforts!

@thelittlestmig3394 5 лет назад

"_Incandecent light bulbs don't last long.._" _Hold my beer_ said the 110 year old lightbulb still in use. Planned obsolescence, mate.

@thejuul8718 5 лет назад

The Firehouse lightbulb documentary. The first example of planned obsolescence!

@johnrubensaragi4125 4 года назад

...compared to LEDs

@thelittlestmig3394 4 года назад

@@johnrubensaragi4125 Even if we go with fabled 100 000 hour LED bulbs, that's just mere 11 years. Shorter lifetime to early bulbs _by order of magnitude_.. Aand you can't get those anymore. When you look at commercially available led bulbs, you'll find significantly shorter lifespans these days.

@deepstariaenigmatica2601 4 года назад

@@thelittlestmig3394 they're not power efficient and not exactly cheap. it's a multi factorial competition. there's a reason why LED's are more successful incandescent

@c.danielthomas8636 8 месяцев назад

But they did nakamura dirty. These big corporations are just dirty.

@percivalliwanag2321 5 лет назад

Edison didn't invent the light bulb

@bradygiacopelli9003 5 лет назад

No but he perfected it and made it cheap enough for every household

@creativelobster560 5 лет назад

percival liwanag yeah he only patented it

@monetaryvalue2303 5 лет назад

nien, edison thought of the idea of heating up a filament in a vacuums, one of his many workers in his workshop reportedly was the first one to try a thin piece of tungsten, he presented it to edison, as it was his job too, and edison went on to begin production and further testing

@thecommenter578 5 лет назад

I think he "developed" it as a product. The previous bulbs were prototypes for experimentation

@percivalliwanag2321 5 лет назад

@Luis Toby Edison didn't invent ac he invented DC and he didn't perfected the lightbulb he only perfected the electric chair

@TheCromwe11 3 года назад

Very well put together, I will use some of this within my Lighting Course

@deQI-vx3pv 5 лет назад

thank you japanese people

@Auggies1956 5 лет назад

We converted both floors of our house to LED. We are happy with the service they have given us only one burn out in over two years.

@kcr6282 5 лет назад

For the record, Thomas Edison did not invent the light bulb, he was the first to devise a process for successfully mass manufacturing the light bulb.

@avid0g 5 лет назад

Edison patented the glass-on-wire seal with a glass pipette to draw vacuum, a cheap limited-life carbon filament and the "Edison" threaded bulb base.

@lander77477 8 месяцев назад

1:01 They are designed to not last long so it makes people regularly buy more. They are easy to build to never burn out, but then you would never get repeat business.

@thejokeyboy5265 8 месяцев назад

who else is here after the veritasium video :P

@kyles5960 8 месяцев назад

Me😯

@Paul-gz5dp 5 лет назад

Incandescent bulbs are a cheap heater that will work in environments that electronics will not. However the LED's are great for general lighting, displays, and many other uses as well. LED's can't be used in a vacuum or inside an oven, but where it is cool but not freezing that is not a problem. It is just nuts how some think that they can be used for everything when it is not the case. I have them in LCD screens, room lighting, outdoor lighting, but not in my dryer, not in my oven, not in my refrigerator, not in my freezer as incandescent bulbs are better in those applications. LED's are safer than halogen work lights both for fire and for keeping people from getting burned. The problem though is when you need a light to do a quick job and someone will only sell you a light that is over $500 to do a one time thing that is highly unreasonable. We should not be forced to use them, but have the choice.

@moskva-kassiopeya 5 лет назад

"Electric bulbs don't last long" - and we all know why

@ThatOneHuman264 8 месяцев назад

Another Example How Determination and Strong Will-power Can Make Great Discoveries That Can Make Life Better.

@TheSolongsidekick 5 лет назад

LEDs don't get hot? Well there goes your credibility.

@gabrielbalsa1843 5 лет назад

LEDs get hot, due to current flow. However, it's way different from incandescent light, which uses temperature to emit light via radiation. Instead of LEDs that use photon emission via semiconductor potentials.

@TheSolongsidekick 5 лет назад

@@gabrielbalsa1843 I know that, but it's not relevant to whether LEDs get hot or not. They do.

@lastnamefirstname8655 8 месяцев назад

here from recommended from veritasium video on blue LEDs and nakamura.

@Burbsi 5 лет назад

incadescent lightbulbs don't last long because of planned obsolescence. Osram, GE, Philips and the rest of the Phoebus cartel has been fined for this. And LEDs get hot when they need to be as bright as conventional lightbulbs. Unfortunately the lifespan of led's is also greatly decreased when they get hot. Just look at all the LED products that have an aluminum heatsink on them. Also showing big incadescent lightbulbs and 5mm leds is pretty misleading, don't you think?

@pierreuntel1970 5 лет назад

Just don't overclock LEDs, cheap Chinese LED usually are "factory-overclocked" so they'll be brighter than what they're rated for which also means hot and short-lived

@Burbsi 5 лет назад

@@pierreuntel1970 thats absolutely true, but then they are not bright enough. A close relative of mine talked to a engineer for designer lamps. He told him that LEDs need to be overdriven to meet expectations of customers, who were switching from old Lamps with incadescent bulbs to new LED Lamps...

@pierreuntel1970 5 лет назад

@@Burbsi you're supposed to put more led chips/die to make them brighter, not overdriving them

@UsedToBeConsumer 5 лет назад

Finally got my answer to why did we not use LEDs long time ago for lighting question :D

@DontBeAGunt 5 лет назад

LEDs do get hot. Idk why people always say they dont.

@avid0g 5 лет назад

Most small discrete LEDs don't get warm, much less scalding hot like incandescent.

@jeffkardosjr.3825 5 лет назад

And they do burn out or fail.

@avid0g 5 лет назад

@@jeffkardosjr.3825 Yes, LEDs fail, but only because they are over-driven or not temperature protected. Almost every LED failure is due to high junction temperature allowing the dopants to migrate. If you keep the temperature low enough, the device will operate for centuries.

@DontBeAGunt 5 лет назад

@@avid0gthats true but when youre talking about a lamp used for fixtures, or the cob LED's on nice flashlights, they definitely get hot, albeit less than incandescent.

@avid0g 5 лет назад

@@DontBeAGunt Yes, no doubt. The majority of people have never been up close to a high power COB array or LED, so the reputation is for cool devices. We know they can easily exceed 100°C (although a cooler device lasts longer).