The Story of Blue LEDs: Inventing the Future

29 wrz 2017
394 275 wyświetleń

The blue LED. Ubiquitous as they are now, they’re a relatively recent invention! Yet without them so much of our modern tech wouldn’t be possible, from cell phone displays, to energy-efficient light bulbs. Join me in LGR Tech Tales, looking at stories of technological inspiration, failure, and everything in-between!
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● Music used in order of appearance:
"Nautical 2" by Loscil
plworld.info/show/qqChoNe-mHWbq9Y/wideo.html
"Anekbah Theme"
plworld.info/show/fZ2bm8DRjpnLh6g/wideo.html
Downtown Alley 1, Particle Emission 2, Smooth Deal
www.epidemicsound.com
"Twin Shine"
plworld.infomusic
● Sources for this episode's info:
web.archive.org/web/20141008120714/the-japan-news.com/news/article/0001625473
www.livescience.com/48193-how-blue-leds-changed-the-world.html
aip.scitation.org/doi/10.1063/1.1753706
www.japantimes.co.jp/news/2002/09/20/national/court-dismisses-inventors-patent-claim-but-will-consider-reward/
www.sciencedirect.com/science/article/pii/0022024889902005
www.popsci.com/diy/article/2010-02/gray-matter-light-mystery
aip.scitation.org/doi/abs/10.1063/1.109374
www.pbs.org/wgbh/nova/blogs/physics/2014/10/how-blue-leds-work-and-why-they-deserve-the-physics-nobel/
ledmuseum.candlepower.us/1960.htm
www.ecse.rpi.edu/~schubert/Light-Emitting-Diodes-dot-org/chap01/chap01.htm
www.industrialalchemy.org/articleview.php?item=529
www.newscientist.com/blog/technology/2007/04/led-older-than-we-thought.html
spectrum.ieee.org/tech-talk/semiconductors/devices/no-nobel-for-the-father-of-the-led
spectrum.ieee.org/tech-talk/tech-history/silicon-revolution/rcas-forgotten-work-on-the-blue-led
www.nobelprize.org/nobel_prizes/physics/laureates/2014/popular-physicsprize2014.pdf
www.nobelprize.org/nobel_prizes/physics/laureates/2014/nakamura-bio.html
www.commercialsihate.com/the-ctrlv-game_topic4100_post169281.html#169281
www.ledinside.com/news/2014/10/the_story_behind_shuji_nakamuras_invention_of_blue_leds
edisontechcenter.org/lighting/LED/TheFirstPracticalLED.pdf
medium.com/starts-with-a-bang/why-blue-leds-are-worth-a-nobel-prize-2b5ff8c22803
www.popsci.com/article/technology/why-blue-led-worth-nobel-prize
www.ifsc.usp.br/~lavfis2/BancoApostilasImagens/ApConstantePlanck/ApCtePlanck2013/LIGHT-EMITTING%20DIODES.e-0521865387-2e.pdf
www.nanophotonics.org.uk/niz/publications/zheludev-2007-ltl.pdf

Komentarze
  • I really never thought about the origins of the modern technology we take for granted today...

    Jason ShaoJason Shao16 dni temu
  • Well I had no idea blue LEDs were so difficult to develop, or so recent. As someone who loves my home smart lighting setup, this is fascinating. Thank you!

    David Jackmanson in Melbourne, AustraliaDavid Jackmanson in Melbourne, Australia27 dni temu
  • When I was in college I wanted to buy one for a project. And the guy said are you sure? It’s kind or pricey at $56...Oh and it has a 7V forward voltage... Say what?! Make it a green one :)

    Raymond DoetjesRaymond DoetjesMiesiąc temu
  • My PC case has two vertical stripes of blue LEDs... it was incredibly annoying at night, so finally I've covered it all up with electrical tape. And also blue light seems to really hurt your eyes on the long run... so it might not be such a great invention afterall. But interesting story nevertheless.

    MetalTrabantMetalTrabant2 miesięcy temu
  • Nichia is still number one. I won’t buy a flashlight unless the main diode is from them. Cree comes close but Nichia are the closest we can currently get to natural looking light.

    Vincent PellegriniVincent Pellegrini2 miesięcy temu
  • Minor correction at 8:47 -- you mean HIGHER wavelength (or LOWER frequency).

    Alexander EweringAlexander Ewering2 miesięcy temu
  • Great science is done on the shoulders of giants.

    techmouse1101techmouse11012 miesięcy temu
  • How about a similar story on the blue laser? they had a lot of challenges to come up with it. On another note, I'd like to see pink LED and pink lasers! 😁

    Veronique487Veronique4873 miesięcy temu
  • They used to be an impossibility. Now I can buy a big bag of 'em for cheap. Crazy stuff.

    sandakurevasandakureva5 miesięcy temu
  • I remember buying my first blue LED. It cost me close to AUD$7 for ONE! Nowadays you'd get 100 for that price (& probably including shipping!).

    sumatoborukiSarusumatoborukiSaru5 miesięcy temu
  • No one knows what it's like to be the red one and the green one behind blue LEDs 🎶

    Fab FuntyFab Funty6 miesięcy temu
  • I give you my thumbs up just because of the way you said “Our story begins...”. It felt like I was getting ready to listen to a much loved family storybook and that made me happy.

    Jacques Machado-SteinmanJacques Machado-Steinman6 miesięcy temu
  • My gaming setup fills the whole room with blue. Don't tell me blue LEDs aren't bright. My fans are blue. My keyboard is blue. My mouse is blue. My mouse pad is blue. I'm thinking of putting LED strips on the back of my monitor to sort of complete the setup.

    Aidan ChappelleAidan Chappelle6 miesięcy temu
  • Franlab had a wonderful similar video

    Timmy73Timmy736 miesięcy temu
  • I never realized that blue LED’s are recent, now that I think of it, it makes sense that there’s no blue LED on an NES and other old things

    SummboddiSummboddi7 miesięcy temu
  • Thank you very much for bringing up a more physics Tech Tale, which is very well and accurately explained! I am doing research on printed organic LEDs and we're facing quite similar challenges those days. Although companies such as Samsung and BOE are doing consumer Products including blue OLEDs, their lifetime, efficiency and colour purity is still the major issue to be solved. The shorter the wavelength, the higher is the energy per photon. But those high-bandgap materials tend to be very unstable in active state.

    himbeertoni08himbeertoni087 miesięcy temu
  • That pretty light from my ps2 on first fire up.

    DonkoNoirDonkoNoir8 miesięcy temu
  • Blue commercial Leds were used since the 1980s in the VW Cars for indicating that the high beam light was on.

    Il ItalianoIl Italiano9 miesięcy temu
  • Everyone in the 1990’s went “holy shit blue and white LEDs?? The future is now!”

    Travis RustonTravis Ruston9 miesięcy temu
  • As someone who has played with a blue LED on a breadboard with a 555 timer, my retinas now regret everything. And 220Ω resistors don’t do crap!

    MCB18MCB189 miesięcy temu
  • Man your videos are awesome!!!

    RedID SoftwareRedID Software9 miesięcy temu
  • 1 9 *o* 7

    ⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻ 1⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻ 19 miesięcy temu
  • I collect LEDs, and now I want one of these old ones from Monsanto or GE. Not very hard to find on ebay, but I cannot justify spending $50 on a single LED

    EierEier10 miesięcy temu
  • u blew my fuckin mind like with every new sentence of this video, yr videos are so fucking dope and informative

    AydenAyden10 miesięcy temu
  • Consumer LEDs are what give me hope for the future. We did the impossible - made a commercially viable light source that produces essentially no waste heat, and will (essentially) never burn out Imagine telling that to Edison a hundred years ago? Makes you wonder what we consider "impossible" today that will become commonplace tomorrow

    Joshua EvansJoshua Evans10 miesięcy temu
  • It's funny how things work. When blue LED's became affordable, I modded every PC I had back then to use blue LED's for the power and HDD activity ect. Now, however I can't stand the things and anything that comes with one as standard now gets modded back to the old colours of red, green or yellow lol. I modded my modern Corsair case to have a green/red power LED and a yellow HDD LED.

    FrontSideBusFrontSideBus10 miesięcy temu
  • I hit a blue "like" icon then a blue airplane to send this.

    babalon 777babalon 77710 miesięcy temu
  • The blue led is NOT used in smartphone screens unless you are talking about OLED screens.

    Mads PetersenMads Petersen10 miesięcy temu
    • chris toey liquid crystals in red green and blue but they need to be backlit. That basicly how every screen that isn’t an OLED screen works - a LCD screen. And it doesn’t matter if you call it LED, ULED or quantum dot; its all LCD screen. en.wikipedia.org/wiki/Liquid-crystal_display

      Mads PetersenMads Petersen9 miesięcy temu
    • Mads Petersen What is used as the light source in a non OLED screen then?

      chris toeychris toey9 miesięcy temu
  • What’s a phosper?

    KorradeKorrade10 miesięcy temu
  • 8:49 *Their **_longer_** wavelength.* Lower makes no sense talking about wavelengths, only amplitude and frequency can be described as higher or lower. - A pedant

    AgeingBoyPsychicAgeingBoyPsychic10 miesięcy temu
  • All of our power indicator lights are blue led lights.

    Tom’s Video CollectionTom’s Video Collection10 miesięcy temu
  • MORE TECH TALES !!!!

    nikolai Vasilevnikolai Vasilev11 miesięcy temu
  • The smartphone has cemented its place in society and now its viewed as a common everyday item but not even 10 years ago it was seen as a luxury. Fascinating to see such effects technology has had on us.

    Felipe JaquezFelipe Jaquez11 miesięcy temu
  • In my brief forray into computer information tech, I recall laughing with my teacher about blue LEDs littered throughout my PC build. Kids and our headache inducing pizazz, you know? If only I'd known the historic impact behind the blue light we run to and fro! Oh the delicious irony! May we put on our blue-light filtering spectacles, lest we take the wavelength for granted. I am thankful for the blue little LED of my youth and your enlightening tech tale, LGR.

    Alex SpeckinAlex SpeckinRok temu
  • Herbert Merusca also pioneered the fashion of like 60 percent of the dudes in Portland OR

    • • nannesoar •• • nannesoar •Rok temu
  • Watching this I thought about the first LED I ever truly looked at, on my C64 Then I just realized I'm watching this in a room lit with LED lights

    Karl SmallphonesKarl SmallphonesRok temu
  • there are currently 5 blue LEDS on. laptop cooling fan,computer cooling fan,battery pack,another battery pack and my computer power light

    DARTriderDARTriderRok temu
  • Interesting and informative, as always.

    Rimothy LogboneRimothy LogboneRok temu
  • no wonder blue led or laser cost more... or does it really cost more to make

    Wayne EvansWayne EvansRok temu
  • One of my cousins on my dad’s side helped develop Blu-Ray technology and told me about it a couple years before it went public. I was actually sworn to secrecy, even having to sign a non-disclosure agreement, preventing me from mentioning the new technology until it was released to the public. I couldn’t even say the word Blu-Ray without worries of being sued.

    Simply DivineSimply DivineRok temu
  • Who did the SAT reading of this?

    NuLLNuLLRok temu
  • Awesome engineering & development. Now everyone who needs blue LEDs can have them. Cheers!

    LectronCircuitsLectronCircuitsRok temu
  • Blue's clues

    G SG SRok temu
  • I guess you could say these blue lights were pretty special.

    Grill SkillzGrill SkillzRok temu
  • Worth mentioning the contribution of Polish scientists into what blue laser is today to complete the story en.m.wikipedia.org/wiki/Blue_laser

    Ka WoKa WoRok temu
  • wait, green is a primary colour?

    Weak VeryWeak VeryRok temu
  • Banzai for Hardcore science!

    MariuszMariuszRok temu
  • Now, blue light is the reason why I can't sleep in the evening while binge watching LGR from my phone.

    kirby march barcenakirby march barcenaRok temu
  • At my place of work (US Army & Airforce Exchange...the PX, or BX) here in the UK, a few of us still refer to equipment for sale; TV's, Bluetooth speakers, Laptops, etc, as having "SBL" technology if they do incorporate the Blue LEDs, to our customers....most don't question it, but for the occasional one that does, then we do enjoy telling them that "SBL" technology is merely "Sexy Blue Light".....it always gives us, and the customer, a bit of a laugh..!!

    Steve's StuffSteve's StuffRok temu
  • Anyone else remember when the first waterclear LEDs came out? I bought like 20 for a project in green, yellow and red...and man it cost a bomb!

    Jamie KulhanekJamie KulhanekRok temu
  • This is a great example of how inventions work. We forget how innovation works to advance our society. Recently I have seen pushback from people who say we should halt space exploration, but doing so could prevent scientists the funding they need to create new revolutionary technologies. Thanks for the interesting video!

    Zachary DrummondZachary DrummondRok temu
  • Quality content. Thanks LGR

    Roberto IturrietaRoberto IturrietaRok temu
  • (stares blankly, blinks) This is why I'm not a scientist.

    Jess RaganJess RaganRok temu
  • Fascinating. I worked in a hi-fi shop in 1994 and we got in a couple of Marantz power amplifiers for demo. These had blue LED power indicators and my colleague mentioned in passing that they were incredibly hard to produce - a remark that stayed with me for all these years. Now I know why!

    AndyAndyRok temu
  • I literally gasped and dropped my phone on the ground all because my birthday came up on the day the blue LED was invented... o.o all because the video made it sound so complicated to make made me too excited.

    orgomemberxvorgomemberxvRok temu
  • I love capitalism.

    PursuitOfFitnessPursuitOfFitnessRok temu
  • shit, didnt knew that Blu-ray did use blue lazers, good to learn stuff

    MrDjBigZMrDjBigZRok temu
  • My toaster doesn't have LEDs

    Threetree583059Threetree583059Rok temu
  • I once swapped all the green LEDs on an AST Ascentia laptop to bloo and painted it gloss black. I almost got all the girls.

    WillWillRok temu
  • Apparently Bloomberg like your idea so much they decided to make essentially the same video with some of the same images. LGR's was way better. plworld.info/show/mZSuf663fKmcaso/wideo.html

    docsavdocsavRok temu
  • Very interesting didn't know it took that much effort

    Brandon PetermanBrandon PetermanRok temu
  • The invention of the century!

    Justin HillJustin HillRok temu
  • Great video detailing the people who struggled with this technical challenge and the details that came together to make it reality. Grateful that there are people who ask questions like "what if"!

    Jim SuttonJim SuttonRok temu
  • I fucking hate these things. When it's 12 AM and you're eyes have gotten used to the dark, they practically illuminate your entire room.

    ALIASALIASRok temu
  • for all the effort put into making them, i almost feel bad about taping over all of them so my room can be dark. seriously, having a monitor with a blue led thats always on (even when the device is off) and a blue led on a laptop that says its charging can light up an entire room for no reason. why? why do this? stuff like the DS and Gameboy Advance SP had nice gentle orange leds that were soft and didnt throw much light when they were charging, but with blue leds its like a fucking eifel 65 concert in your goddamn room, everything is blue, inside and outside

    Mercury ZamMercury ZamRok temu
  • Ah yes, I remember. When they eventually did become available to anyone, they were pretty expensive. I still have the first ones I ever saw and tried somewhere, part of a small project that was never finished. Certainly, it's nice to have the full spectrum available, but that blue LED light has always felt kind of unnatural to me, and ironically, too bright.

    VermiliciousVermiliciousRok temu
  • I had no idea blue LEDs were invented shortly after I turned 5. xD

    Kent HambrockKent HambrockRok temu
  • I actually hate the blue led. It's overused and is almost always too bright.

    ImagineMediaImagineMediaRok temu
  • I had no clue it goes back that long ago. I thought it’d only been around 15 years or so. You’ve answered all my questions I’ve asked for years in one video. Thanks

    Andrew SlatckiAndrew SlatckiRok temu
  • amazing

    U4GU4GRok temu
  • I love LED's, they're just so simple and pure in their design and intent.

    danner253danner253Rok temu
  • Sure blue LED's are nice but why did they have to replace the red and green for status indicators in my Hi-Fi?

    Kim ArvidssonKim ArvidssonRok temu
  • And this is how Zeos' bane came to be.

    Metal NeonMetal NeonRok temu
  • Oleg/Oled come on carnt be by chance!

    Nathaniel ChisholmNathaniel ChisholmRok temu
  • Blue laser also from Nichia.

    TinLethaxTinLethaxRok temu
  • smh just put some blue marker on regular led

    Ahmes SyahdaAhmes SyahdaRok temu
  • It's interesting that there is still ongoing progress in making blue/white LEDs brighter, cheaper and more power efficient. For example, the most recent (early 2019) LED bulbs by Osram and Phillips provide 800 lumens at just 7 watts. The previous generation required 8,5 watts and was notably larger. I think it's not long till cars will have pure LED headlights. By the way, OLED screens do not use classical LEDs. Only LCDs use LEDs, namely as background light. OLED is a different technology.

    TrurlTrurlRok temu
  • Very fascinating history, quite ironic that nowadays. Blue light are considered as "dangerous and eye-damaging" and many people try to avoid it.

    pojcharapol tosukowongpojcharapol tosukowongRok temu
  • This video is the most under watched video on this whole channel. It is also probably the most interesting episode.

    Chris GroffChris GroffRok temu
  • "A few" years ago (I'm thinking circa 2012) I was paying upwards of $15 each for 450 lumen LEDs that ran at 8-12 watts. Now I can go to the dollar store and get 8w, 800 lumen bulbs for about 7% of the cost of the (dimmer) bulbs that are still running years later. On top of that, my solar panels gather enough power to run them even on the cloudiest of days. And I still think back to the uproar we saw when efforts were made to phase out the old 100w incandescent heaters in favor of the CFLs that are now *also* inefficient by comparison to LEDs. #LEDFanBoy

    Baron von QuiplyBaron von QuiplyRok temu
  • Blue LED's as headlights needs to be banned though, I mean sure you see the road better, but you blind literally everyone even with low beams which kinda defeats the purpose of having brighter lights in the first place

    SnOpeK DomoweiSnOpeK DomoweiRok temu
    • Yeah but think about this: You can see into the multiverse with headlights that bright

      Storms and SaugeyeStorms and SaugeyeRok temu
  • damn, rca was ahead of their times and its sale and liquidation set back the tech

    esgarramanteresgarramanterRok temu
  • i remember not being allowed to use blue leds in electronics projects as they were "too expensive" now theyre everwhere

    rich1351rich1351Rok temu
  • I just watched a video about lighbulbs that taught me more than every unit of light i learned in school

    Hana MizunoHana MizunoRok temu
  • This was a very well put together video.

    CraigthepopeCraigthepopeRok temu
    • Thank you!

      LGRLGRRok temu
  • Connor got a blue LED as well!

    Vlad A.Vlad A.Rok temu
  • 9:25 I'm watching this video on that phone!

    Avery GustafsonAvery GustafsonRok temu
  • I think this is the only tech tale I watched so far that no one died. I'm not watching them in order though so maybe I missed one.

    Egg WhitesEgg WhitesRok temu
  • Funny how nowadays flashlight makers, collectors and enthusiasts want to make their high power LEDs _less_ blue. Nichia, for example, focuses a lot, and I mean a LOT, in high fidelity colour rendering for their emitters.

    Dinner-fork tongueDinner-fork tongueRok temu
  • I'm blue da ba dee da ba daa

    Joseph StalinJoseph StalinRok temu
  • I dunno if you liked doing these sorts of videos Clint - but let me put in my vote - I think your attitude, voice, approach - all would pull in an audience like 'Technology Connections' - would pull views in. expand yer empire man - you have the power! :-)

    TheFlyingScotsmanTheFlyingScotsmanRok temu
  • Are Blue LEDs the easiest type of LED to hate?, you see, blue was a part of the RGB color model, RGB consisting of red, green and blue,.......... Hmm!

    Abdulaziz AlserhaniAbdulaziz Alserhani2 lat temu
  • lol, i asked my electronics teacher in like 2001 "why dont we use LED's instead of incandescent bulbs in torches or as house lights - i was immediately kicked out of the class xD bastard probably did it so he could take the patent xp

    holidayfishholidayfish2 lat temu
  • Cool!

    Jaakko PöntinenJaakko Pöntinen2 lat temu
  • 3:33 Funny how old this idea is. Now it's reality.

    HookTheGamerHookTheGamer2 lat temu
  • What's hilarious about me watching this episode is that I'm currently looking at the blue leds I ordered to replace all the interior lighting or my 2nd Gen Ford Explorer. Everything from the instrument cluster to the window controls will be changed from green incandescent to blue led.

    Impetuously InsaneImpetuously Insane2 lat temu
  • You do have to wonder if Shuji Nakamura will be remembered in a positive light in the future (Pun intended) I mean, he's arguably responsible for RGB LEDs as they are today...

    DemocrabDemocrab2 lat temu
  • This was FASCINATING! Thank you!!!

    BornahorseBornahorse2 lat temu
  • This guy is the reason RGB is a thing

    ThatGuyRedThatGuyRed2 lat temu
  • RGB

    Ulises BarbozaUlises Barboza2 lat temu
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