Quantum Dot Technology [backlight technology]

[Nocta]

It seems that a new technology is going to be sold as a competitor of OLED and claim 1/3 of the price for the same picture quality.
It's called Quantum Dot and I don't have much informations but I feel good to hear that the race toward quality panels technologies is finally starting!

If anyone get more infos, please let us know.

[RealNC]

QD isn't really that interesting. It's just a cheap way to improve colors of LCDs while using cheap WLED backlights. Everything else is just the same, including motion blur.

[Oofloom]

Right now it's only used to improve the color in a few laptops and HDTVs, and 1 tablet that I know of. I've seen the HDTVs with it, and at least in that case it is a major improvement. Personally I wouldn't buy an LCD without it.

[spacediver]

The technology involved in the actual production of the "quantum dots" is quite interesting.

http://www.youtube.com/watch?v=y199SFdUPyo

[flood]

wait so
are qd's being used as backlighting or for the actual pixels?
looks like it's just for backlighting

why dont people work towards using qd's the same way oled is used in oled displays?

a qd-backlit lcd is just a lcd with larger gamut... there's nothing else to it really. it would still have crap viewing angles, black level, transition time, etc.......

[spacediver]

I haven't look into it really, and it's been a long time since I watched that episode, but the answer might be "either" or "both". It's certainly an emmissive technology, so ideally would be used to form the pixels (as described in the episode), which are stimulated by photons (e.g. UV light).

The Quantum Dot TV from Sony, however, uses the tech only in the backlight I think, but I'm not really sure.

http://www.avsforum.com/forum/139-displ ... plays.html

[flood]

everything i've seen only indicates using it for backlighting... which is really a waste

[spacediver]

yea, I think the pixels that Hartlove was referring to are pixels in the sense that they form the backlight surface, and when innervated with photons, produce a white backlight.

I imagine that given that these dots respond to photons rather than current, it would be hard to target individual pixels with the same precision as a CRT or LCD, though I'm just speculating here.

[Chief Blur Buster]

For completeness sake -- relevant Blur Busters Forum thread about quantum dot backlights:
http://forums.blurbusters.com/viewtopic.php?f=7&t=932

I am interested how efficiently a quantum dot backlight may be strobed -- does anyone know how fast does a QFED film decay after its power is shut off?

[flood]

a little googling:
http://journals.cambridge.org/action/di ... 9413002042

. Alternatively, electric current can be used for direct excitation of QDs

as for how fast it responds, i'm gonna guess that it's tunable