What They Say
The Elec has been busy in recent weeks and today reported that Samsung Display (SDC) has started to try to develop a new technique for making its QD-OLEDs that uses only one of the two current glass substrates. The current design uses one substrate for the controlling TFTs and another for the conversion layer.
The blog said that SDC is trying to use inkjet printing on top of the blue OLED encapsulation layer to create the QD colour conversion layer and its encapsulation on top.
Reasons for the change are said to include reducing the thickness of the panel, cutting the cost and making it more feasible to develop rollable versions.
What We Think
My understanding was that SDC has a colour filter on top of the QD conversion layer to minimise the impact of ambient light and improve image quality. Creating that on top of the QD colour conversion layer is likely to be challenging, I would have thought, although IJP colour filters are not new. Still, I would have thought that the sheer number of different layers would mean significant scope for defects or mura.
Separately, yesterday I mentioned (QD-OLED Reviews Appearing for Alienware Monitors) that I thought that response times for QD-OLED and WOLED should be around the same. I am grateful to the reader who has access to people that have looked closely at this, who confirmed that while blue OLEDs are quicker than green/yellow OLEDs and QDs are ‘ultrafast’, we are talking about nanoseconds and microseconds, not milliseconds. If there is a difference in apparent response, it will be ‘something in the electronics’. Even loading the drivers takes some time. (BR)
This was what was expected from QD OLED a couple of years ago. Source: DSCC/OLED-A Quarterly OLED Material Report
