Is the samsung s90d global bfi and the lg c9 rolling scan?

[naylord]

Hello,

I "upgraded" my LG C9 with a Samsung S90D recently. Color volume is a lot better, but even though both displays have 60hz bfi, I feel like the BFI was quite a bit better at preserving motion in my C9 vs my S90D. Both seem to halve brightness to my eye, which is just fine with the painfully high brightness of the s90D. One thing that makes me think it could be rolling scan vs global is with my crappy phone camera at my C9, I would see a rolling scan on the cameras viewfinder. Now that didn't quite prove rolling scan, because for all I know the camera image is being drawn in a rolling scan way, and it's just picking up the black frame during one part of it's cycle and the non blacked out frame during another. But I notice the picture is entire and stable with no blackout scan when pointed at my s90D during BFI.

I'm planning on returning the s90D soon, but not mainly due to it's worse BFI. That is a huge reason, but the main reason is chromatic abberation. It's super weird, but that display interacts with my glasses to produce much worse chromatic abberation than I've ever seen anywhere else in real life or on a display. I suspect it's the super precise color distribution is causing very steep cutoffs in the refraction angles of the subpixels.