Originally Posted by revetahw
What do you think has prevented any of these companies from making qleds over the last few years? I would like to know the big difference between now and 2 years ago and why it was left to these little companies to solve whatever was missing if this will really lead to such a big breakthrough.
Big companies don't want to invest in half-baked technologies that might fail in the end or in technologies too difficult and costly to commercialize, especially after spectacular failure of SED. Also, nobody wants to take a chance at investing in a new technology that has little chance to offer better PQ at much lower cost than LCDs. If there's little chance more money could be earned with a new technology than with LCDs, then what's the point of even trying to develop something new? So, in the end, it's up to these small companies to bare the whole burden of risk of developing a completely new technology in the hope of licensing it later to the big boys. The big companies expect these small R&D companies to hand them complete solutions on a silver platter, or they're not interested.
I've done some more reading on QLEDs and it seems like the difference between then and now is the improved chemistry of QLEDs that leads to greater efficiencies. While photoluminescence of current QLEDs is probably good enough already, it's useless for display technology. In order for QLEDs to be used in displays, they have to be really good at electroluminescence and that is something that has begun to be worked on in the last few years and current performance is lagging well behind what photoluminescence can achieve. From what I can tell, performance of electroluminescent QLEDs only recently started to approach OLED's but QD Vision claims that electroluminescence will end up as the most efficient way of generating light from quantum dots, far surpassing what OLEDs could ever hope to do, and it's just a matter of time before that happens.
Also, QD Vision and another company Solvay are going to develop a printing process for QLEDs.
So, with increasing progress on the QD performance front and likely ability to print QLEDs on anything on the horizon, LG apparently sees enough good things to think it's worth placing a bet on QLEDs, especially since they have experience making OLEDs and, theoretically, have all the necessary pieces ready to develop QLED displays.
Meanwhile, there are big plans to use the same quantum dots to improve LED backlights next year, which will not only bring a lot of attention to what quantum dots can do, but it should also drive the progress of making better, more efficient QLEDs.