One interesting possibility (which I am unaware of in production, but which makes interesting technical sense) is to have QDots that are pumped by VCSELs. I imagine something like - each QDot has a controlling transistor that determines whether it can be pumped or not - edge VCSELs flood the screen with photons, and each "pumpable" QDot takes up some energy and the reradiates it at its (the QDot's) design wavelength.
The reason this strikes me as interesting is that VCSELs have become crazy efficient at energy->light conversion (substantially more so than LEDs) and they are small and cheap. They form a great pump mechanism, and QDots form a great mechanism for generating light of exactly the frequency you want (more efficient than phosphors). The only snag, it seems to me, is whether my scheme of somehow using a transistor behind each QDot to control whether or not it can be pumped by VCSEL photons is practical.
Gan vcsels are insanely hard to make, and are mostly low milliwatt. Plus the light quality is poor due to speckle, and efficiency is limited as well. 800 nm or 1000nm are much better, but can't be used for pumping.
I think the problem for Samsung is that LG holds all the good patents for OLED displays, that's why Samsung is pushing Quantum Dot. Without LG's patents they can't build cheap OLED panels for big TVs.
I hope they could use this on cheap panels for TVs and laptops. The blue light in cheap products is rather annoying. They have the least saturation. Once you calibrate them for better white/grays, brightness drops drastically.
I have seen the performance of this tech on the Philips monitor here and it is quite impressive for displaying deep reds and greens.
As far as I know, QD panels are pumped by the same blue LEDs as phosphor panels. There is no point in using anything else since GaN happens to emit almost precisely on the blue primary.
QD makes possible one thing that a lot of people seem to overlook: It is technology that can easily briing wide gamut AdobeRGB-capable monitors ideal for photography into price range of normal business monitors. The high-end will quickly shift into more recent HDR gamuts, basically enabling photography amateurs working on print-grade colorspace. Neat!
I am more interested in how Apple achieve similar results from the Monitor without using Quantum Dot, which Apple said requires the uses of toxic substance.
The purpose of this tech is to offer the same advantages of expensive high-end screens to the lower price tiers, at least initially. I don't think Apple Monitor ever offered something that was never before seen in a screen and that's exactly why Apple retired it while other manufacturers are going strong. It was just about profit margin and that margin is shrinking with every technological advancement, bringing professional quality levels (and prices) into the amateur tiers.
What do you need more than one optical audo out on your tv? I use my lone out (top of the line Panny plasma) to my Denon. All inputs are via HDMI and then the optical audio out back to the receiver. My receiver has three inputs. One for the HTPC, one for the Blu-Ray player and one from the TV.
It's really been surprising how resistant the market has been to RGB diode backlights. They're really not that much more expensive than a blue LED +QD and can do things that QD backlights cannot do (like fully software programmable color gamut).
Why do you need backlight when you got OLED? LCD was and always will be a primitive technology that only exists because it was cheapo to sell compared to plasma killing in the process the true successor of CRT's:
Panasonic used red and green phosphors in their backlight to achieve a wider color gamut, but the appear to be leaving the TV business. They have already pulled out of the US.
Cool post. I recently purchased Galaxy S8 on Ebay that was bought in Italy. I live in Germany and here Samsung Pay didn't work on this phone. Flashing the phone helped to solve this problem. I downloaded firmware here https://sfirmware.com
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PVG - Wednesday, November 23, 2016 - link
Meh, buying technology to build crapier panels.I would rather see Samsung starting to drop LCDs and pushing OLEDs. I need those OLED prices to drop!
ajp_anton - Wednesday, November 23, 2016 - link
They need to drop LCD, yes, but replace it with QLED instead with quantum dots as individual pixels.PVG - Wednesday, November 23, 2016 - link
Whatever gets cheaper first is fine by me. I doubt qled will be it, but if it is, great.name99 - Thursday, November 24, 2016 - link
How do you pump the quantum dots?One interesting possibility (which I am unaware of in production, but which makes interesting technical sense) is to have QDots that are pumped by VCSELs. I imagine something like
- each QDot has a controlling transistor that determines whether it can be pumped or not
- edge VCSELs flood the screen with photons, and each "pumpable" QDot takes up some energy and the reradiates it at its (the QDot's) design wavelength.
The reason this strikes me as interesting is that VCSELs have become crazy efficient at energy->light conversion (substantially more so than LEDs) and they are small and cheap. They form a great pump mechanism, and QDots form a great mechanism for generating light of exactly the frequency you want (more efficient than phosphors). The only snag, it seems to me, is whether my scheme of somehow using a transistor behind each QDot to control whether or not it can be pumped by VCSEL photons is practical.
saratoga4 - Thursday, November 24, 2016 - link
Gan vcsels are insanely hard to make, and are mostly low milliwatt. Plus the light quality is poor due to speckle, and efficiency is limited as well. 800 nm or 1000nm are much better, but can't be used for pumping.Lord of the Bored - Monday, November 28, 2016 - link
They should replace it with SED!yannigr2 - Thursday, November 24, 2016 - link
I think the problem for Samsung is that LG holds all the good patents for OLED displays, that's why Samsung is pushing Quantum Dot. Without LG's patents they can't build cheap OLED panels for big TVs.jkampy - Wednesday, November 23, 2016 - link
I think it was a smart move. Grab up a key player in a technology that will eventually surpass OLED for color quality....and at a good price.Lolimaster - Thursday, November 24, 2016 - link
Color wise only a similar tech surpass OLED, nanoled/crystalled, the same thing as oled minus the organic component.zodiacfml - Thursday, November 24, 2016 - link
I hope they could use this on cheap panels for TVs and laptops.The blue light in cheap products is rather annoying.
They have the least saturation. Once you calibrate them for better white/grays, brightness drops drastically.
I have seen the performance of this tech on the Philips monitor here and it is quite impressive for displaying deep reds and greens.
saratoga4 - Thursday, November 24, 2016 - link
As far as I know, QD panels are pumped by the same blue LEDs as phosphor panels. There is no point in using anything else since GaN happens to emit almost precisely on the blue primary.Vatharian - Thursday, November 24, 2016 - link
QD makes possible one thing that a lot of people seem to overlook: It is technology that can easily briing wide gamut AdobeRGB-capable monitors ideal for photography into price range of normal business monitors. The high-end will quickly shift into more recent HDR gamuts, basically enabling photography amateurs working on print-grade colorspace. Neat!iwod - Thursday, November 24, 2016 - link
I am more interested in how Apple achieve similar results from the Monitor without using Quantum Dot, which Apple said requires the uses of toxic substance.Speedfriend - Thursday, November 24, 2016 - link
There are cadmium-free quantum dots available froma company called Nanococlose - Thursday, November 24, 2016 - link
Magic...The purpose of this tech is to offer the same advantages of expensive high-end screens to the lower price tiers, at least initially. I don't think Apple Monitor ever offered something that was never before seen in a screen and that's exactly why Apple retired it while other manufacturers are going strong. It was just about profit margin and that margin is shrinking with every technological advancement, bringing professional quality levels (and prices) into the amateur tiers.
Drilmechanic - Tuesday, September 25, 2018 - link
Quantum dots give us more variations in production from not toxic materials, than LEDs can give.Gothmoth - Thursday, November 24, 2016 - link
all this "more brightness" and more "candy colors" is just nonsense for noobs.HDR footage looks just crappy on most LCD displays today.
dolbys HDR is maybe better but not widely supported.
it doesn´t matter sh*t when you have LCD panels that suffer from grave DSE, bleeding and clouding.
personally i don´t see much difference in color rendition.. but what i notice is clouding and DSE.
and even 3000 euro LCD displays have those issues ... still.
Gothmoth - Thursday, November 24, 2016 - link
samsung... the companys who offers one optical audio output with their 2016 TV´s.... that´s it... great!!!!!bigboxes - Thursday, November 24, 2016 - link
What do you need more than one optical audo out on your tv? I use my lone out (top of the line Panny plasma) to my Denon. All inputs are via HDMI and then the optical audio out back to the receiver. My receiver has three inputs. One for the HTPC, one for the Blu-Ray player and one from the TV.saratoga4 - Thursday, November 24, 2016 - link
It's really been surprising how resistant the market has been to RGB diode backlights. They're really not that much more expensive than a blue LED +QD and can do things that QD backlights cannot do (like fully software programmable color gamut).Lolimaster - Friday, November 25, 2016 - link
Why do you need backlight when you got OLED? LCD was and always will be a primitive technology that only exists because it was cheapo to sell compared to plasma killing in the process the true successor of CRT's:SED/FED-
saratoga4 - Friday, November 25, 2016 - link
It's a shame that sed didn't work out, although it's unclear if it could ever have been made cheap even compared to OLED.OLED still has lifespan issues, and the cost is more than most people seem willing to pay. LCD will still be around for a long time.
Drilmechanic - Tuesday, September 25, 2018 - link
LCD + Quantum Dots = widest colour gamut, cheapest price, not toxic materials.wrkingclass_hero - Friday, November 25, 2016 - link
Panasonic used red and green phosphors in their backlight to achieve a wider color gamut, but the appear to be leaving the TV business. They have already pulled out of the US.oleksa - Monday, May 4, 2020 - link
Cool post. I recently purchased Galaxy S8 on Ebay that was bought in Italy.I live in Germany and here Samsung Pay didn't work on this phone. Flashing the phone helped to solve this problem. I downloaded firmware here https://sfirmware.com