QDEF - A Stepping Stone or Alternative to OLED? - AVS Forum
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post #1 of 14 Old 03-29-2012, 09:47 PM - Thread Starter
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QDEF - A Stepping Stone or Alternative to OLED?
Interview with Jeff Yurek - Nanosys Inc


QDEF is a new kind of backlight technology that's going to enable a new generation of LED backlit TVs that have OLED-like performance at only a fraction of the cost.

Display performance is all about light- how much can I generate, how efficiently, how wide a range of colors, and how much resolution can I pack in? QDEF gives LCD makers a way to tune the spectrum of light in the backlight and dramatically improve picture quality. It does this with millions of tiny nanoscrystal phosphors, called quantum dots. These dots emit light at a very precise wavelength and can be controlled by their size. We use a mix of different color emitting dots to create the perfect backlight for your LCD. The result is richer, more saturated color that's more true to life.

Read the complete article at HomeToys.com
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post #2 of 14 Old 03-29-2012, 10:53 PM
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Originally Posted by Bob Hetherington View Post

QDEF - A Stepping Stone or Alternative to OLED?

No and no.

There is no difference in HDMI cables. If you can see the picture without visible dropouts or sparklies, the cable is working at 100%. No other cable will display a better version of that picture. You're simply wrong if you think there is a better digital cable than one that is already working.
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post #3 of 14 Old 03-29-2012, 11:49 PM
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plasma backlight?
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post #4 of 14 Old 03-30-2012, 01:26 AM
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Originally Posted by stopdrpnro View Post

plasma backlight?

I hope you're joking.
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post #5 of 14 Old 03-30-2012, 05:19 AM
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Check out the Home Theater Geek archives on Twit for a detailed interview about this with its creator.

Home Theater Greek Episode 99: Quantum TV
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post #6 of 14 Old 03-30-2012, 05:53 AM
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How well does it handle off angle viewing in comparison to how well OLED and Plasma displays do?
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post #7 of 14 Old 03-30-2012, 09:41 AM
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It's an LCD, greenland. The film improves the color spectrum of the backlight and therefore the apparent contrast. It doesn't change anything else.

I doubt anyone will be adopting this to be honest, except maybe in some niche applications.

There is no difference in HDMI cables. If you can see the picture without visible dropouts or sparklies, the cable is working at 100%. No other cable will display a better version of that picture. You're simply wrong if you think there is a better digital cable than one that is already working.
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post #8 of 14 Old 03-30-2012, 01:35 PM
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That was what I had concluded from the description on the linked to site, and they still will not be able to compete on contrast ratio numbers or response times. I guess it might be an improvement for people who want to stick with LCD displays, but other than that it seems like much ado about very little.
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post #9 of 14 Old 03-30-2012, 02:01 PM
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Quote:
Originally Posted by greenland View Post

That was what I had concluded from the description on the linked to site, and they still will not be able to compete on contrast ratio numbers or response times. I guess it might be an improvement for people who want to stick with LCD displays, but other than that it seems like much ado about very little.

IMHO opinion black levels are no longer much of an issue on a GOOD backlit LCD. Read the reviews of the Sharp Elite. One of the mags compared it side by side (literally) with a Kuro and could find very little difference

If I had $8K to spend on a 55" OLED it would be much ado about nothing, but if I can pickup something with the same color quality for $1,000-$1,500, I know whcih I'd choose. Now, the Sharp Elite is $7K (although that's for 70 or 80-inch I forget which). If it were a 25% premium for OLED I'd pay it, but not a 500% premium - no way (unless I win this weeks $500m illinois lottery).

For me, that's the key. it's a simple manufacturing change which means mcuh better color for the same price.

Regards

mark

Other backlit LCD's are coming close to the sahrp Elite
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post #10 of 14 Old 03-30-2012, 02:45 PM
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Mark,

You are comparing a technology that has been on the market for years, and has had time to see the prices come down, against OLED which is going to just release it's first generation panel later this year. It too will come down, and that Sharp price for an Elite badge on a technology that has been around for years, is very steep indeed.

That Sharp Elite panel also has a terrible problem with inaccurate color display, that professional calibrators have not been able to correct. I am afraid they are selling the sizzle instead of the steak, and some people are falling for it.

If you want to have a display that comes close to the Kuro Elite, at a more reasonable price, then you should take a look at the top of the line Panasonic 2012 plasma set.
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post #11 of 14 Old 03-30-2012, 06:27 PM
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Hi Greenland

I guess that's part of my point. LCD is a mature technology and I believe that QDEF is helping to extend its life and improve it's quality. I remember buying my first 36" HDTV CRT and what that cost. 10 years later a top of the range backlit LCD or Plasma is half the price. I'm sure the same will happen to OLED...in time.

If the manufacturers can get good yields from OLED and once the ramp up costs have been written off, I'm sure OLED will come down to today's LCD prices. That said, I reckon we're looking at 5-10 years for that.

I agree wholeheartedly about Plasma. I'm a huge fan. If my Kuro died today, I'd almost certainly go out and get a top of the line Panny. Heard something last week about a top of the line 65" panny for $2600. (Would love a projector, but I don't really have a good space for that until I gut the basement). If I could pick up a 55" OLED for under $4K, I'd consider that (but not a v1.0 product). The problem with Plasma is that most manufacturers are shutting down production and consumers still perceive it as the technology that it was 10 years ago: burn-in issues, very higher power consumption, etc.

It's unfortunate that it all really comes down to marketing. If you tell the general public for long enough that a 1" thick LCD is the hottest thing, they'll buy it without a clue about edge lighting, backlighting, etc. These fancy looking sets also have a very high WAF too. So people run out in droves to buy them, marketing people love it: another cash cow. It's a vicious circle.

I'm dying to see a QDEF set and see if it measures up to it's promises (ditto for production OLED). I'm going to be replacing a 7-year old 720p plasma in the bedroom in the next year or so. It'll be ineresting to see what my choices are.

Regards

Mark
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post #12 of 14 Old 03-31-2012, 10:10 AM
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Have you guys seen this. QLED it is like a printed matrix of micro led's as pixels.no need for a lcd matrix on top.

http://www.qdvision.com/qled-technology

http://www.qled-info.com/

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post #13 of 14 Old 06-08-2012, 03:52 PM
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http://optics.org/news/3/6/9

http://optics.org/news/3/6/9

3M to challenge OLED displays with quantum dots

Optics.org - 1 day ago
The giant industrial company says it will commercialize a quantum-dot optical film that dramatically improves LCD color.

http://www.xbitlabs.com/news/monitors/display/20120607212544_3M_and_Nanosys_to_Develop_Quantum_Dot_Technology_to_Widen_LCD_s_Colour_Gamut.html

http://www.xbitlabs.com/news/monitors/display/20120607212544_3M_and_Nanosys_to_Develop_Quantum_Dot_Technology_to_Widen_LCD_s_Colour_Gamut.html

3M and Nanosys to Develop Quantum Dot Technology to Widen ...‎ X-bit Labs

http://www.eetimes.com/electronics-news/4374699/Nanosys-teams-with-3M-film-to-yield-less-costly-LCDs

http://www.eetimes.com/electronics-news/4374699/Nanosys-teams-with-3M-film-to-yield-less-costly-LCDs

Nanosys teams with 3M film to yield less-costly LCDs‎ EE Times

Nanosys Gets 3M to Bring Its Quantum Dot Technology to LCDs‎ IEEE Spectrum

http://spectrum.ieee.org/nanoclast/semiconductors/nanotechnology/nanosys-gets-3m-to-bring-its-quantum-dot-technology-to-lcds

http://spectrum.ieee.org/nanoclast/semiconductors/nanotechnology/nanosys-gets-3m-to-bring-its-quantum-dot-technology-to-lcds

http://www.intomobile.com/2012/06/08/nanosys-3m-joining-forces-make-lcd-screens-display-50-more-color/

http://www.intomobile.com/2012/06/08/nanosys-3m-joining-forces-make-lcd-screens-display-50-more-color/

http://www.plusplasticelectronics.com/consumerelectronics/3m-and-nanosys-to-collaborate-on-quantum-dot-film-57007.aspx

http://www.plusplasticelectronics.com/consumerelectronics/3m-and-nanosys-to-collaborate-on-quantum-dot-film-57007.aspx
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post #14 of 14 Old 07-28-2012, 05:27 PM
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Quote:
Originally Posted by rogo View Post


No and no.

You can bet the TV makers are looking close at this technology. They need to make up for past losses. OLED is being litigated as we speak. This is going to increase OLED prices and slow down development. No one wants to introduce a new technology as they are getting sued over it. Remeber SED?

http://hexus.net/business/news/legal/42497-lg-employees-charged-samsung-oled-theft/

http://www.fastcompany.com/1842947/lg-samsung-already-embroiled-in-oled-espionage

http://www.hdtvtest.co.uk/news/samsung-accuse-lg-oled-tv-201207192018.htm
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