Originally Posted by fafrd
Sounds kind of rube-goldberg.
LG's process 3 vapor deposition steps on the same piece of equipment.
This hybrid JOLED process woukd require the blue oled vapor deposition on one piece of equipment, then shifting to another piece of equipment for printing of red and green.
Plus, if the blue is being patterned using masking techniques similar to how Samsung did it, they're likely to face the same challanges scaling up to larger sizes - 21.6" is less than a quarter of the area of a 55" screen...
p.s. and unless this monitor is WOLED with color filters like LG, being able to print yellow wouldn't help
Yes, the point about yellow was pointless.
It is Rube Goldberg. It's also been proposed more than once by people who actually work in the industry -- unlike me.
That said, the mask you'd need to do 21.6-inch monitors is less than half the mask size Samsung was working with on the 55s (although again I don't know what was deployed on Samsung's production) and would require zero scanning to make monitors. It'd be a single mask.
And let's pretend for a moment they will mask deposit blue and then print the other two to "prove" printing sort of works. That would help raise all this money to do a true RGB within a few years where they can continue to hope someone makes a printable/soluble blue that would last for 5-10 years in a commercial display. Such a material still might be possible, even though in 17 years or so we've yet to see much evidence of progress towards one.
Originally Posted by Jason626
Is it possible to print red, green then some other color combo and use a filter for blue?
No. You could do a lot of weird things, including trying to vapor deposit a whole sheet of blue (the way LG does) and then trying to print something over 2/3 of it that would allow you to lay down the red and green on top of it. Some kind of "resist" layer that your printer could handle. It's still super convoluted and really everyone should be trying to perfect what LG has done (think much smaller electrode traces, more clever filter designs, etc.) rather than work an angle that so far lacks evidence of being viable.
But again, what do I know? Perhaps someone secretly does have this next generation material and *isn't* a material supplier, who would presumably be shouting it from the rooftops as it would be worth billions.