8K OLED... Quantum dot...Future of The TVs is Not What We Think...! - Tech updates

8K OLED... Quantum dot...Future of The TVs is Not What We Think...!

8K OLED's ... Having Quantum Dots... Future of our Television screens...


I thought the next big thing in TVs was gonna be Micro LED, a technology with all of the advantages of OLED and none of the downsides. It was gonna be sweet, but I was wrong. Samsung recently announced that they are ceasing all LCD production by the end of the year and investing eleven billion dollars in OLED, but with quantum dots? Quantum dots don't go with OLEDs, why would you even want that? Why didn't they do this already then? ; Company that makes the majority of the world's quantum dots, who gave us fascinating answers to all of these questions and more. Origin PC just introduced multiple corsair case options for their desktops and new laptops powered by the latest Intel and Nvidia tech. Customize your Origin PC with a Samsung 970 EVO m.2. (electronic music) Quantum dots can make OLEDs better in three key ways, more accurate colors, higher brightness, which is great for HDR, and wider viewing angles. Sound familiar? Great because that's the same benefit that quantum dots have been bringing to LCDs for years now. But the way that Samsung's going to use them on OLEDs is different from anything that we've seen before. Samsung's planning with their QD display OLEDs is short, the second half of 2021 to be exact, but COVID so. Then in the far future, we've got wacky micro-LED competitors that are neither LCD nor OLED, but we'll save that for later. 
Why quantum dots are useful in the first place…?  Quantum dots are molecule-sized spheres of nano semiconductor materials that emit light if you provide them with energy and they behave differently according to their size, so if you shine a high energy photon like blue light, at a quantum dot that's seven nanometers wide, it'll glow red. Shine the light on a three-nanometer dot, and it'll glow green. The best part is the nanosystem vary their output in one-nanometer steps. So they get to be picky about what color shines out. Blue? That's just what I wanted.  So quantum dots allow a display to load true red or true green and that's not just an opinion. You can tell by looking at the waveform of the light. For comparison, here is a typical LCD backlight unit, these lights don't shine white, they shine blue. Then they are treated with a YAG phosphor so that it all mixes into white, but blue light is narrow? There is a measure used by industry called full-width half max. It's the width of the wave halfway up its amplitude.
Blue LED has a full-width half max of about twenty to thirty nanometers. The YAG portion, well that is a big wide one hundred nanometer mess containing contaminating colors like pink, orange, and teal. That's a problem. The white light from the source then passes through color filters at the display sub-pixels to separate the light into red, green, and blue. Now these filters themselves have a pretty loose definition for each color, so what ends up hitting your eye, inevitably goes through this game of telephone. But what if we made our white light using a blue backlight with red and green quantum dots? Well now, everything has a full-width half max of just thirty nanometers, then when the color filters take say red, they only get red, not, you know, orange or something. HDR specs require wide color gamuts in addition to very high contrast. But it kinda makes you wonder. If you start with pure red, green, and blue, why do you even need the color filters?
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So with this new knowledge, let's go back to the three ways that quantum dots will make OLEDs better. They will have more precise colors coz quantum dots have a slightly thinner full-width half maxes than the current OLED solution. Number two, the brightness will be higher because more of the emitted light will be allowed to pass through instead of being blocked. And number three, they will have wider viewing angles because quantum dots are just plain better at scattering light evenly in all directions than the around 50 degrees which are given by current OLEDs before the color turns to shift. So that's what's happening, but why is it happening now? Samsung's been using quantum dots and making the world's best OLEDs screens for smartphones for years now. I mean, didn't they already have all the ingredients? Does anybody know why they didn't just put them together? - Not really. Samsung's AMOLED phone displays are RGB OLEDs, while the big-screen TVs that LG makes is WOLED.
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Samsung's inexperience making big-screen OLEDs, means they have to play catchup in terms of addressing geometry because the driver I see on the edge of the display is so far away from the pixels in the sender. - They also have to figure out exactly how to make an OLED using a lone blue phosphor. The blue light will not be converted, coz it is avoiding any efficiency loss at all but for that to happen it has to be the right blue, royal blue. It's difficult because unlike quantum dots, these phosphors are complex, organic materials that are doped with your opium and other rare earth materials and you can't sort these millions of molecules after the fact, you can only control the manufacturing. The rumor right now is that Samsung will be targeting the DCIP3 color gamut using a mixed blue emitter without conversion.
Then there's the manufacturing side, the color converting quantum dots have to be imprinted onto the display substrate. That means that not only does the inkjet printing for the color filter in a large splay need to be possible, which only happened recently, but the quantum dots themselves need to be integrated into inks that don't clog the inkjet nozzles can be printed at open-air rather than in a vacuum and can be cured using standard manufacturing methods. Seems expensive, I'm not gonna throw it.
Quantum dot electroluminescent or QDEL displays. Well, that energy doesn't have to be a shining light, you could power them with electricity. The quantum dots themselves will form the pixels, they will be simplifying the technology stack and because quantum dots aren't as sensitive as OLEDs, they don't need to be manufactured in vacuum chambers with walls as thick as a battleship. That enables manufacturing that is so much simpler than it could reap other breakthroughs like truly flexible substrates that can hold entire radius'. That tech is actually in the lab today with research by nanosys customers happening all over the world. So then what are we waiting for?
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The limiting factor now is lifespan. The problem has to do with radiative recombination pathways. In layman's terms, if you put energy into a device and not all of it turns into light, the rest is either creating heat or breaking chemical bonds. That's a problem. Now, nanosys thinks that we're gonna get this sorted out within the next five years or so. So that would mean that the first devices to hit the market would come in around 2025 to 2027. Not bad considering that we're trying to understand these materials at the atomic scale.

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