Originally Posted by ynotgoal
Yes, the much discussed materials cost savings of inkjet printing. Every article says its so. It makes sense .. so much expensive materials wasted on the shadow mask. Its just that on current displays, the total cost of the materials (not royalties based on display price) they are talking about inkjet printing is about 2% of the cost of production. So saving 50% on those materials saves about 1% of the display cost. Ok. It has to be among the most overhyped cost savings in displays. It's fair to say inkjet printing yields could be greater than the really low RGB shadow mask yields at gen 8 and larger sizes. I'm not convinced why patterning with inkjet printing will have better yields than painting the whole substrate for WOLED though.
I want to again be clear, we generally agree on this. The cost savings are minimal (no matter what Merck says) and the yield advantage is hypothetical only (no matter what anyone says).
But I meant the functional purpose of inkjet printing is to deposit a patterned subpixel and the purpose of WOLED is to not require patterned subpixels. So why inkjet print WOLED.
Again, we are in perfect agreement. I mentioned it only so no one would ask without it already being answered. Not everyone understands how the tech all works.
As you say, though, it doesn't matter until there's a soluble blue material. There may be someday just not today.
Irkuck makes an interesting point about why they made it public. Lots of work happens that isn't made public. One possible reason is to signal to Chinese panel makers thinking about investing in 10.5 gen LCD lines that they may face competition from 10 gen OLED lines.
It's possible that's the case, though a coming 10G fab is hardly news. The 2018 fab is ~10G, whatever method it uses (which every intelligent person should bet is almost identical to the existing vapor-deposited WOLED).
I have no idea why they made it public, but LG doesn't seem to be a primary materials researcher and none of those that are has even suggested there is a soluble blue. The one thing we've heard in the past is the idea of a franken-hybrid using vapor deposited blue and then inkjet printed red and green. I could envision ways in which this is possible, but as I'm not a display-fab engineer I can only guess they might work. I also doubt they are economical, but who knows.
Originally Posted by irkuck
If somebody missed how the story about IJOLED entered this thread, it is from the same outlet which rogo is citing:
and goes like this:
LG Display is going to carry out pilot production for inkjet printing OLEDs sometime during first half of 2017. Although it will take another one to two years from pilot production to actual mass-production, it is meaningful in that LG Display has actually in a stage of development after finishing up with R&D.
text clearly implies the blue
problem is solved and it is rather unlikely this publication would get it out of the blue
You can keep believing this. I don't really care one way or the other. I'm just pointed out a soluble blue OLED with lifespan in the 1000s of hours (let alone the 10,000s) would be news. It would be a big deal for a Merck. Or a UDC. Or DuPont. Or CDT. No one even seems to have a recent paper, let alone a product.
Maybe LG itself has cooked something up in its lab and feels like it can mass produce that in 2-3 years. Their own failure to deliver on deadlines should make people skeptical of a claim like that, should they actually make a claim like that.