- cross-posted to:
- science@lemmy.world
- videos@lemmy.world
- cross-posted to:
- science@lemmy.world
- videos@lemmy.world
The blue LED was supposed to be impossible—until a young engineer proposed a moonshot idea.
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Making blue LEDs is easy. Just make a red one, then move towards it really fast.
Doppler effect?
https://en.m.wikipedia.org/wiki/Redshift#Blueshift
Essentially yes
Yeah but it only works if the source is moving towards the observer
Excellent counter example to anyone claiming that we need patent and copyright to innovate.
This man made nothing on his invention and was not motivated by money but fame.
There are endless of examples of how those who do things for money hold back the creativity that leads to innovation. This is one of them. It almost didn’t happen because his pursuit was not seen as profitable.
Sure, but the company fronted the millions of dollars required to develop the technology. The investment needs to come from somewhere.
That doesn’t have to be a private company, though. We need public funding that retains the patent rights, if not just to make the invention free from licensing costs to manufacture.
The insane thing about our current system is that we do have public funding, but private companies wind up with the patent anyway
The company didn’t invent it. A person did. The company almost stopped it from being invented. They didn’t spend millions inventing this. A person spent tens of thousands of hours inventing it.
That the funding is only available from a company is a result of the patent system. It does not spur development, it perverts it. Any ideas to the contrary are propaganda.
People have been inventing shit longer than corporations have existed. People have been inventing things without any guarantee on return on investment for most of human history.
Capitalism is bullshit and the capitalization of ideas harms humanity.
Maybe they didn’t invent it. But he wouldn’t and couln’t have invented it without them.
Someone would have invented it eventually though.
Correct. With or with patents and with or without copyright, it eventually would have been invented.
Edit: Curious if you watched the full video. It clearly indicates that all corporate efforts were heading in an opposite direction and that the path this inventor took was considered to be not profitable and not worth the investment by everyone else working on this. The company he worked for wanted to shut down his research and focus on following the herd. No one else was close to his level of progress and capitalist interests almost scuttled this invention.
Yes, I watched the video. Inventing stuff is obviously very expensive and I doubt anyone could have done it without being financed in some way.
Why are you so sure that the eventually hypothetical inventor wouldn’t have patented it? Inventing is expensive and one would presumably want to make the millions spent on the project back and isn’t your time worth anything?
I am happy that the invention wasn’t delayed considering how much it has changed the world.
I mean, the video even showed that there WERE notable people other than him travelling down the same path, his first few leaps were copied off them, he just figured out the last few himself
Yeah it’s pretty bad and nobody talks about it. Nobody researches the effects of patents on our global civilization. I suspect the practical role of patents is to actually retard innovation - something gets improved or invented or most of the time just engineered to work better and monopolization or just paperwork makes it too expensive for wide spread adoption. This in turn helps prevents disruptive technology from making large scale investments obsolete - instead of having to adopt and improve your factories you can continue as before because any innovation will be slow and also priced to be around as expensive as existing solutions. Or the patent can just be bought. And even if an inventor has noble intentions, starting manufacturing yourself is a totally different skill set so like most startups often fails and then the patent gets sold off. Innovation becomes a commodity.
This is my logical conclusion but it’s speculative. I suspect researching negative effects of patents is a somewhat “taboo” topic for scientists to research.
In regards to climate change this becomes… genocidal. We have hundreds of thousands of industrial processes that rely on fossil fuels or certain levels of energy. With all the before mentioned effects this basically made a timely response to climate change impossible. Every little improvement to existing processes is patented and maximized for profit. Basically we never had a chance.
This man made nothing on his invention and was not motivated by money but fame.
And then he sued the company for $20 million because the CEO didn’t want to respect his efforts and stiffed him.
And the amount he actually won only covered the legal fees, so he made nothing.
And if he had been granted a patent for his invention, he would have been fairly compensated for his work by being able to license production to companies that had the means to make them at scale. OP seems to think this scenario is an example of how patents should be abolished, but it’s a perfect example of why we have them in the first place. And that reason is so that rich people don’t fuck over comparatively poor inventors.
Your cognitive dissonance is why we cannot improve this system. Patents cannot both be responsible for his lack of profit from his invention and how he would have been fairly compensated.
Patents do exists and we was not fairly compensated, therefore patent do not solve their intended problem.
We live in this reality. Not whatever rose colored version you think could exist if we just get the correct tweaks in place.
At some point we need to stop trying to adapt the concepts people came up with hundreds of years ago. Created in a world that no longer resembles our own.
Consider how contentious the issue was that they redefined to included it in the constitution. The consider what other contentious issues were also included in that same document, i.e. the three fifths compromise.
Parents do exists
Phew, was scared there for a second.
Haven’t watch the video yet, but I remember how impressed my step dad was with the blue LED when we got our PlayStation 2. I was like, yeah great whatever let’s play games, at the time.
Really annoying that the company shat on him for years, and continued to do so after he multiplied the value of the company. Toxic behavior.
It’s an extreme example that perfectly illustrates how profit is extracted from employees by the employers. He didn’t have any leverage to get a larger share of the profit from his labor, as is the case with most employees. You could call it toxic behavior, and it is, but it’s the expected behavior, the behavior incentivised by the system.
It also shows how capitalism hinder innovation. It doesn’t create it. The potentially innovative path took money without any guarantee of creating profit. It’s bad business to be innovative. Capitalism prioritizing profit never chooses the best path, even if it gets a good ending eventually despite itself.
Capitalists are motivated to innovate if there’s undistorted competition. If they don’t they will lose new markets. For exemple Microsoft and IBM failed to build the start of general public web search and Google won. More recently, Google failed the race to release the first general public LLM, OpenAI backed by Microsoft did.
There are probably as many examples of this as there are of companies ruining innovation for stupid reasons.
Though, what better system that a regulated “free” market do we have successfully tested? A bunch of political leaders deciding alone of what the companies should do? How does that prevent irrational decision that stops innovation? How do you prevent them from just doing whatever benefits them as seen in many authoritarian regimes that were supposedly socialist?I’m not sure how you come to this conclusion. For every example of a capitalist avoiding risky investments, there are 100 capitalists betting on the next innovation.
Venture capital. Heard the term? AI, Metaverse, crypto, web 2.0, .com… The tech space alone is full of capital making (stupidly risky) bets. They also make good bets too, like PC, search engines, online shopping (oh, look how the tech giants came to be).
I get it, capitalism bad. But this is just a nonsensical argument.
I was working for a place that was the market leader in a certain niche of simulation software. Their simulation was about 10x more efficient than their competitors. However, that version of the software is strictly off limits for the public, and made a version which they sold with a sleep statement so that it was only 1.1x faster than the next best solution. That way they could remain market leaders any time the competitors released a better version. Even though many systems rely on growing simulations to simulate bigger scenarios that could help save lives.
Just an example of capitalism impeding progress.
Open source software solves that kind of hidden bullshit.
And open source software is explicitly anti-capitalist.
free software is. open source is an attempt to sell free software out to capitalist interest.
eric raymond and the OSI are not good.
The ratio might not be 1:100. It might not even be tilted towards the risk takers. Also some if not most of the examples you mentioned are based research done in universities and defence agencies. That research is typically a much riskier endeavor. That’s why the private sector doesn’t even attempt it and only shows up to productize or build upon that research once the risk for not turning profit is minimized.
Sure, it happens sometimes. However, the goal is never innovation for the sake if innovation. It’s innovations to create profit. The idea is you invest into one of these ideas that then creates a monopoly that can practice anti-completive behaviors to create more profit.
For example of something better, look at research universities. They are normally outside of capitalism and create innovation primarily for the goal of advancing knowledge of a subject or to solve some issue. It’s rarely purely for profit to sit on the thing after it’s created and ensure no one else can use it.
This is something that’s often poorly understood. There’s no profit in a perfectly competitive market. That is, according to orthodox economic theory, the most efficient market conditions are the ones where no participants make profit. From that you can derive what you said - that innovation is sought for moving a business away from perfect competition by gaining competitive advantage, which is anticompetitive! 😆
Yeah metaverse and crypto are such innovate projects that will really change the world and not just more the same bullshit cash grabs.
Really undermining your own argument.
You completely missed the point there, damn. He’s saying those things are very likely to be bad investments.
No I get the point. But showing they make make stupid decisions doesn’t prove capitalism drives innovation, because those ideas aren’t innovative.
Innovative ideas are rarely smart ideas.
It’s a capitalist company that funded him to go to Florida and bought him the machine to do his work.
Where do you think he would get the 3 million the company gave him? It’s the company that spent that money to bet on innovation and they got a return on investment
Capitalism never chooses the best path, but neither does any other system. We haven’t invented a perfect system, and it’s probably impossible. Sounds like a strange critique since we’ll never reach perfection
Where do you think he would get the 3 million the company gave him?
As the story describes, it was the founder who was acting emotionally that funded him. It was no different than a noble patronage of someone like DaVinci in medieval times. When the capitalist son in law took over, he was cut off. It was only Japanese culture from Japan’s pre-capitalist era that saved his job.
The founder was acting in the company’s interest, that’s why you fund research.
He was actually not cut off either, he wasn’t fired when he continued his research despite being told not to. He still received a salary and was able to use the equipment purchased with company funds
Capitalism never chooses the best path, but neither does any other system. We haven’t invented a perfect system, and it’s probably impossible. Sounds like a strange critique since we’ll never reach perfection
Just because nothing is perfect doesn’t mean we can’t call out stuff for not being it. Sounds like a strange critique since we’re supposed to improve on things.
Yes, but in any system some guy will decide which research is important. And that guy can’t possibly make correct decisions every time.
I don’t see a way to improve on it
And that guy can’t possibly make correct decisions every time.
Doesn’t matter. What matters is that they make correct decisions oftener than before.
And the way to improve on it is clear: do more of that, with peer review.
Come on this is not news, this is how progress has worked in the last [checks smudgy writing] 4600 years.
Then invest in a company that is structured that way, there’s no actual constraint on how a company is organized in capitalism
You’re right that nothing is perfect. How does that make critique invalid though?
Capitalism prioritizes profit. That’s it. We can imagine systems that prioritize any number of things; public welfare, innovation, creativity, equality, etc. Nothing will be perfect, but I’d say any goal is better than the selfish goal of profit seeking. Do you disagree?
And then capitalism that made the company repeatedly ask for him to stop researching it.
It’s the opinion of one person at the company. Under socialism there are also people who decide which research deserves funding.
Yeah where he went to a university not a capitalist company to learn. Then persisted in his research despite the capitalist company wanting to shut him down for not being profitable, then that company specifically and consciously screwed him over and didn’t reward him for it. Then tries to screw him over once again when he got a different job because of it.
Who funded him to go? It’s not like he paid for the trip out of his pocket
The company could have also just fired him for not listening to orders. But I agree that they didn’t compensate him enough
The CEO of the time who actively went against the conventional wisdom of capitalism to fund a person he had know for decades and personally knew how capable he was.
Then as soon as that CEO left the personal connection was gone and typical capitalist mentality took over and tried to shut it down
Just like almost every big discovery this happened in spite of capitalism, not because of it.
That could happen in socialism, where a government grant runs out and research is no longer funded because the person in charge of funding science changes.
Didn’t fire him though. I don’t think my boss would let me sit in an office doing my own project and binning notes from him for 20 years.
Makes me presume power harassment.
On the flip side, he was using up millions and millions of company dollars on his singleminded pursuit with no obvious results to show for it. Had things gone even a little differently, things would’ve gone very differently indeed. Hard to imagine most companies tolerating an employee flat ignoring instruction to change to another task when their old task was proving fruitless.
Hindsight is clear enough here, but in context it was pretty nuts what the guy was doing.
Makes you wonder how many great inventors of revolutionary tech were shoved off their path by dumb luck.
Probably far fewer than never had the opportunity to realize they could be great in the first place.
If greatness is one in a billion we have 8 (boy would the richest like us to believe that!). If it’s one in 100 million (I’m bad at math. I think it’s like) 80. Or if it’s one in a million, that’s 350 in the US alone. I’m inclined to lean toward the later, after all, if there aren’t a lot of greats waiting to be called up, how the fuck did we beat the odds by such a large margin??
The greats are beat into submission by capitalism and the horrors they went through to achieve greatness (usually a garbage childhood of some variety)
That’s Japan, baybee. They love their toxic work culture. Thankfully, it is slowly changing with the younger generations, however.
My favorite thing about widely-available blue LEDs was the effect on TV scifi.
Watch the Star Trek shows made in the 1980s and 1990s and the tricorders, alien gadgets, and other props were always twinkling with red, yellow, and green LEDs to look futuristic. A generation later and every single hand prop on 2000s Doctor Who, Torchwood, etc. glowed and twinkled blue because the LEDs had just become cheap enough for prop makers, but weren’t yet widespread in day-to-day life so the viewers were seeing something strange and unusual.
Now every color of LED imaginable is just common and whatever, but for a good stretch of time glowy blue became the standard “scifi” color just because that particular tech happened to turn up at that particular time.
Purple still seems to be a tough one for most rgb devices I’ve used lol
They’re still rgb plus maybe yw using colour mixing, so depending on the quality, tuning, physics and our perceptionof light, not all colours are as nice or bright.
Yeah. I just think being RgB it would be good at purple 😂 One of those situations where the name was probably not created based on logic lol
It’s called RGB because there’s a red, green, and blue diode. Not sure how that’s not a logical name.
Oh I was making a joke cause it sucks at purple. Which is red and blue combined generally. But that’s not really how the RGB color cycle works as far as I understand in some extremely cursory Wikipedia reading lol
IIRC, it has something to do with the fact that purple sort of doesn’t actually exist. As I understand, purple is basically your brain going “idk wtf it is but it’s not green”
lol my favorite color would be a weird one. 😂
9’s sonic screwdriver
I’m not sure that LEDs were the thing that kicked off the trend. They made it easier to implement, but even in the 80s and 90s, you had things like Tron that might have kicked off the futuristic look with neon lines/tubes.
Here is an Odysee Link for those that don’t want to give youtube support.
Just a PSA for those who don’t know… no shade against Odysee… I’ve just encountered folks here who don’t know this:
Veritassium and many others on YouTube make their living by the advertising shown on YT. If you’re a premium member, even more money goes to the creator when you watch their content. It’s this very money that allows independent creators to create more / better content!
I wish he posted his stuff on Nebula as well. His stuff totally fits the vibe of the platform, and would potentially make him even more money.
So they get more from the subscription fee without ads than they from the ad revenue? Many also have their own sponsors, right?
Yes to both!
If they weren’t comfortable with not getting YT ad revenue, they wouldn’t be uploading their content to alternative sites.
Relying on YT as the gatekeeper to your entire livelihood also has a cost. It’s not trivial to calculate but I imagine it’s greater than the loss of AdSense money. There’s a reason many people who rely on video content creation to survive hedge through the likes of Nebula, Floatplane or, indeed, Odyssey.
Shuji Nakamura was a researcher at Nichia who was determined to create the first blue LED, which had eluded scientists for decades. Through innovative crystal growth techniques and materials discoveries, he succeeded in developing bright blue and white LEDs in the early 1990s. This breakthrough enabled LEDs to be used for full-spectrum lighting. Nichia’s fortunes grew enormously as a result, though Nakamura was not properly compensated for his invention. Today, LEDs powered by Nakamura’s blue LED technology are ubiquitous and have brought enormous energy savings worldwide.
Something interesting I found was that Nakamura persisted in his research for blue LEDs against the wishes of his company management, who saw it as a waste of resources. His stubbornness and belief in his work paid off by solving a problem that had stumped the electronics industry for 30 years.
He really got screwed. They didn’t want him even working on blue LEDs and then when he was right and actually made one they gave him nothing and made hundreds of millions of dollars. Then sued him when he left to work for another company for “leaking company secrets” which was really all his work. He counter sued and the courts awarded him like 189 million, then the company counter sued back and he got 8 million which just covered his legal fees.
Wow… for brief, fleeting moment i thought justice prevailed in the end. Silly me.
Um… if someone pays you to do a thing, then they own it. Imagine if you paid me a hundred thousand dollars to build a house and then it’s my house to live in. Doesn’t make any sense at all.
I’m not defending the company, but the law is pretty clear on this. If you want to own your own work, then start your own company.
I think their comment is more a critique of wage labour than a misunderstanding of it.
The world is full of tech companies that pay stock options/etc, if that’s how you want to be paid then you can do that.
Personally I have no interest in that at all and have always turned it down. If I’m going to own shares in a company, then I want voting rights. Nothing worse than watching investment be run by someone you disagree with… actually there is something worse. A company where every single employee has control/voting rights. That would be a complete disaster.
A company where every single employee has control/voting rights. That would be a complete disaster.
Oh no, not co-ops! They give the people, who actually create the products and know how they work, voting rights on the companies direction? So dumb. Everyone knows its best to have a business person, whose sole focus is the stock market and shareholders, controlling the direction of every company.
/s in case it wasn’t glaringly obvious.
company where every single employee has control/voting rights
Isn’t that called a co-op? I hear those tend to do well.
Yeah they go really well. Like you probably use some and don’t realize it. One of my local gas station chains is one
It sucks that they’re down voting you for being correct in your top comment, though I think I agree with the down votes for your characterisation of worker controlled enterprises as “a complete disaster”. They actually work well
I would say that the thing that makes me want to downvote that comment the most is the part where you get stocks/options “if that’s what you want”.
It’s not like every company would offer you that and even if they do promise they might not do that
Our team has joined a big company and we were promised stocks but sure enough they said “we usually don’t do that so we don’t have a contract for such a case”. Our manager almost made them hold their word a year after we joined, then he got fired and sure enough we got nothing. Well, at least the other conditions were not too bad and then the team split and everyone went their own way ¯\_(ツ)_/¯
Funnily enough, the labor to create something is a large basis of Proudhon’s critique in “What is Property?” You sure as hell didn’t spend labor to create the land that house was built on. No one did. Who gave you control over it, and how was it their right?
That’s fine, but if one of your employees comes up with a revolutionary product that makes billions and you choose not to compensate him in any meaningful way, don’t then get surprised when they leave to join another company and definitely don’t sue them for doing so
You legally own what they produced, but you don’t own the individual.
If that house somehow generated more money than you knew what to do with, I’d be happy as hell to share with the person who made it.
Except companies have shareholders that spent their retirement money to purchase shares. You can’t just hand it out, since it’s not your money
That’s like say giving good employees a bonus is stealing some stockholder’s hard-earned retirement. Employee compensation is just a standard expense. Similarly, potential shares of licensing revenue are a common incentive companies dangle to get more employees working on patentable ideas. Maybe only a couple percent, but for significant stuff like this it works out well for everyone involved.
that spent their retirement money to purchase shares
don’t invest (or gamble) what you can’t afford to lose.
using some people’s poor money management skills as an excuse to justify exploitation of the source of your windfall is exceptionally stupid.
a receding tide beaches all boats. every time something like this happens, another genius with another big idea sees it and decides it’s not worth it if they’re just going to get the result stripped away from them by parasitic suits.
It’s not one person’s retirement. Retirement funds have millions of people’s retirement. You can’t just give away a company’s money because it’s not the CEO’s money. It’s the shareholders’ money
He should have been fairly compensated, but again, only up to the point where it encourages workers to work hard
Retirement funds have millions of people’s retirement
and they exist within a continuum of risk profiles. there are safer (and less potentially profitable) options, and there are riskier (and more potentially profitable) options. they have made this decision.
you cannot pick the riskiest options for your retirement fund and then get mad there was more risk than the safest options and that you lost some of it. you cannot pick the safest options and then get mad it’s not performing as well as the riskiest. if you cannot afford to lose your retirement money, do not put it into any fund or mechanism that will gamble with it beyond what you are comfortable with. it is YOUR responsibility. alone.
as a result of your mentality, we will see less and less innovation. people who can improve the world see you and your opinions and decide, well, it’s not worth it. what intelligent person would ever work with organizations that you claim are justifiably ethically bound to stab them in the back and reward them the bare minimum possible?
and why, because grandpa ticked the “minimum risk” button in his sofi 401k and is mad he’s not getting explosive vc-tech-company-tier returns? or because your uncle ticked the “maximum risk” button and is mad he lost some money? you’re catering to the lowest common denominator of uninformed, entitled gamblers and are poisoning the well and breaking the whole system down as a result.
let me guess, you have an MBA?
Is this an AI generated comment? It sure reads like one.
Wait, you’re not AI too?
Yes - I didn’t have time to watch the video and wanted a text summary. Thought others might find it useful
same position can’t watch the video; it was very useful thank you! scrolled forever looking for this, exactly what I was after.
full-spectrum lighting
this doesn’t sound true.
iirc full spectrum means “every wavelength” (like sunlight) and not just “3 wavelengths that add up to white”.
That’s true (here’s an interesting video on the subject of colored light: https://www.youtube.com/watch?v=uYbdx4I7STg), but as mentioned at https://youtu.be/AF8d72mA41M?si=i8wjHjaKRaQbf23b&t=1516, once you have a blue LED, you can use a phosphor to convert the light to a range of longer wavelengths.
I didn’t watch this, but i bet technology connections video about blue Christmas lights is more entertaining!
Which one? The man can’t stop making videos about blue Christmas lights!
All of them! I like Veritasium though, not every video is a banger but this one definitely is
It seems that the blue led is picked by many manufacturers now for its coolness factor. There are so many appliances people have in sleeping areas with blue lights glaring and disturbing sleep
It’s such a big problem that there’s literally LED dimming tape on the market. It’s semi-transparent tape that you stick over the blue LEDs, to knock them down to a more reasonable brightness. It’s akin to putting sunglasses on your appliances.
I just layer on masking tape until it’s dim enough, usually 2 layers
I carry a bit of gaffer’s tape everywhere for those little obnoxious blue bastards.
That was an excellent watch, thanks for sharing.
YouTube is horrendous for ads though.
Revanced
I aint downloading a two year old microg gmscore apk 💀
You thinking of Vanced? Revanced is updated pretty regularly
No when I patch youtube, it wants me to download this 2 year old gmscore build:
Ah gotcha
That’s required for the non-root installation to login to YouTube, yeah. If you are rooted you can modify the patch list and remove microg.
The blue led was released in 1993. I remember reading an article in Wired magazine (back when magazines were published on paper) about the invention. Gladly, the article is still available online: https://www.wired.com/1995/03/blue-laser/
I talked with some friends about the “true boo-roo” led, and the phrase stuck with us (that’s why I still remember the article). At the time (almost 30 years ago) we had no idea how important the invention was, even when we realized that it allowed for rgb led light.
But we had no idea leds would be miniaturized to be used in screens and be as ubiquitous as they are today. Living through all this technology evolution has been quite the ride.
That was a great read, thanks. It made me realise I don’t even remember the last time I changed a light bulb!
I’ve changed my fair share of LED bulbs. Nowhere near the frequency of incandescent though.
I remember reading about this stuff since the eighties and people had a pretty clear idea of the implications.
Well now the digital screen is everywhere, it bends, and some people strap it to their eyes. It’s crazy how far it’s come
This was an yet another glorious episode from veritasium.
I hope we get well past UVC LEDs. (i.e., shorter wavelengths) UV LEDs are already available. Unfortunately, this progress will stop before X-ray light. With +1 KeV energy, you pretty much must blast off the electrons from the atoms to emit X-rays, which an x-ray tube already does. Or by peeling off a piece of scotch tape.
Maybe making X-ray emitters cheap enough to put in a flashlight isn’t the best idea anyway.
Maybe not in a flashlight, but the scientific industry would be very pleased with them. Sterilize water and all surfaces in a second? Flash with 200nm light.
Handheld battery powered X-ray devices exist and are widely available. I used to work with those. In Germany you need a permit to operate them. https://www.thermofisher.com/order/catalog/product/de/en/XL2
What’s wrong with the current UV tubes? Sure, the smaller ones take about 5-10 W to get the job done, so maybe an LED version would be more efficient. If you’re using UV to keep a massive pool clean, then you’re obviously going to be need more of those bulbs, and they can add up to hundreds of watts quite easily. Is that really a big problem though? Having a pool isn’t cheap, so electricity spent on UV probably isn’t going to be your main concern. Making it cheaper is always welcome, but are UV tubes really that big of a problem?
I mean they aren’t instant and have to be within a fairly short distance of the thing you want to sterilize in order to work because they are absorbed by the air. Something like a pool would be practically impossible as water also absorbs UV and a pool is too big to penetrate all the way through just from the sides or bottom. It only works for drinking water because you pass said water through a tube that must be fairly narrow.
Oh yeah and an X-ray could sterilize all the way through an object, not just the surface. Very useful for making things like microwave meals.
/c/flashlight sends its regards
D4V2 x-ray edition when?
How about cheap enough to put in a fleshlight?
If you have a bone in your penis, you may not be fully human.
Otherwise, don’t x-ray your penis.
X-rays use invisible electromagnetic energy beams to produce images of internal tissues, bones, and organs on film or digital media.
Good advice, but I put a Kleenex in my urethra for safekeeping and I’d love to track it down to get it out again.
Next time you have to fart just squeeze your butt cheeks together real hard. It’ll pop right out.
The fart?
You tell me. Your user name suggests some expertise.
Sorry sir I have no idea what you are talking about
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Light = energy, shorter wavelengths= higher energy. Blue light has a shorter wavelength than red light. UV has even more energy. X-Rays have a lot more energy. For reference in the visible spectrum were talking about maybe 1-4 eV (this may be wrong, I’m too drunk to look it up rn).
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If we want to produce light, the aim is to find an energy gap that has the exact energy gap that corresponds to the wavelength we’re interested in. Typically this corresponds to an electronic transition, i.e. an electron “jumps” into a higher orbital, on its way down it will emit the energy difference as light.
2.1 X-Rays rn are produced by accelerating electrons onto a metal plate with high voltage. The impact of the electron “rips” out an electron in the close vicinity of the nucleus. Another electron will take the place of that electron, the energy gap associated with that process is large, which is why it produces X-Rays.
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If we want to produce LEDs that emit in the far UV range we have to find large energy gaps in materials which is difficult. We still have to have a way to get the electron across the energy gap using electricity.
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X-Ray LEDs are probably not realistic, as the energy of x-rays is so large that we have to rip out electrons from the close vicinity of the nucleus… which is already what we’re doing with X-ray tubes.
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More efficient compact X-ray generators would be pretty huge for science work. We run the diffractometer in my lab at 2 kW and it still takes hours to get a good quality scan
Get past uvc for what purpose?
I imagine that lithography for integrated circuits would be an application, assuming you could make an appropriate photo-resist. The shorter the wavelength, the smaller the possible feature size. Current lithography relies on constructive and destructive interference between wavelengths to create super small features.
As far as “light” it’s already capped out, then. Going shorter there’s only x-ray and then Gamma ray. Gamma ray lithography sounds bad-ass and dangerous.
Gamma rays have so much energy that they are basically emitted only by nuclear processes, as far as I know.
Until we stick it in an led!
I guess past the uv range we should just call them ED, but then you only think about erectile dysfunction.
I freaking hate blue LEDs.
I actively avoid buying anything with a blue LED because they are so obnoxious. So bright. Why do I want to read by the light of my HDD? Does this video explain why they have to be like that?
Maybe if you have a separate wing of the mansion to do computing stuff it is not annoying. But if like a lot of people you have electronics in your living space, these lights are extremely disruptive.
It seems that can’t really be dimmed… I had to give up on a couple of blue backlit alarm clocks because there is no way that the time can be visible without illuminating the whole area around them.
For whatever reason, red is the best one. I would prefer another color aesthetically. For whatever reason, red is the only color that does what it has to do and nothing more.
If you own anything with “white” LEDs, I have some bad news for you…
Or reading this on anything except an e-reader or if someone else printed it out on a printer without blue leds first.
Luckily my device screens can all be turned off, closed, put face down and otherwise turned off when not in use. Unlike indicator lights on the routers, APs, HDDs, PCs, mice, powerbars, extension cords, radios, headphones, USB cables, ACs, microwaves etc etc etc. Either totally unnecessary to have a light in the first place, or a subtle light could do the job just as well.
This is actually a biological phenomenon that most humans experience! Our eyes are more attuned to greens and blues rather than reds, so green and blue light appear brighter as the cones in our eyes are more sensitive to those colors. Similarly, our cones are less sensitive to red so it appears darker.
There’s also a physics component to this as well since red light has about half the energy (twice the wavelength) as blue light. However, since there’s a difference in energy, the engineer must take that into account when designing multicolor LED applications so as to keep a level light intensity when changing or blending colors.
Here’s an eli5 question with some more info: https://www.reddit.com/r/explainlikeimfive/comments/ghx9g6/eli5_why_does_red_light_seem_darker/?rdt=58820
I’m the guy that takes an awl and literally shatters them, or I will just place tape over top if they are recessed too far.
Front facing LEDs are a menace.
The first blue LED I ever saw was on the dashboard of my mom’s VW Golf. I always wanted one like that, but now they’re everywhere!
Goodbye night vision
Agreed, though the original wasn’t as bright as the one in the pic. It was a frosted LED and was relatively dim.
I like my car dashboard like I like my 1952 F-86 Saber night variant gauges… Orange
Before there were blue LED, the indicator light for full beam was a blue tinted incandescent bulb. My parents had a Volkswagen Passat from the 1980s (?) where the usually blue indicator light for full beam was a green LED, since blue ones were not invented back then.
A few details as further info, focusing mostly on the technical aspects:
It’s considerably easier to decrease the band gap than to increase it. Decreasing it only requires that you insert some material to provide an intermediate band, while increasing it would likely need alloying it to force some structural change.
The material being in the right band gap is not enough. You need to make sure that it can be p-doped and n-doped, that its crystalline structure is stable even with some temperature variation. Ah, it should be also relatively straightforward to produce industrially.
Then you get the little gem that Nakamura found.
