Getting the same experience with the LG. I understand the explanation and the issue that Zztop described, just wonder how much of a concern it really would be for most people. While we mostly watch in the evenings in dim light, I haven’t noticed anything objectionable during the day or when the room is well lit.
Zztop, I could have returned the Q90, and perhaps should have. When I read about issues others were having, something I saw repeated were claims that a lot of the panels apparently suffered from clouding or dirty screen effect, and there was no guarantee I wouldn’t end up worse off, as others reported they did. 4K content is generally really nice on that TV. The backlighting issue is an annoyance in certain circumstances, and flickering in dark scenes was occasionally experienced, though adjusting settings mostly made that go away. And as I said, this has been a common experience for me with the Samsung TVs I’ve owned, so I’ve accepted it as a downside. Just surprised to see it on a more expensive model, but maybe shouldn’t have been.
Anyway, the LG is living up to the great reviews so far.