Originally Posted by Lyner
Agreed in general. However, the number of dimming zones also plays as a key factor here too. Basically it’s more the zones, the more likely that each of the stars distributed in that space could get an individual tiny zone which is lit for the star itself. All the other zones adjacent to it, in contrary, could still be dimmed anyway.
That being said, the more zones a panel gets, the less importance of the native contrast is. Am I understanding this correctly?
Right, as I mentioned earlier, the more zones you have, the more you can lean on the local dimming contrast, and the less critical the native contrast becomes. But another thing to remember, even at 480 zones, a single zone on a 65" set is close to a 2" square. So in the extreme example of a space shot with stars, even if you have a 2 in² area without any stars, that doesn't mean you can dim it all the way down. They have to transition them from areas of needed brightness to less brightness so the FALD array doesn't become visible (e.g., if one 2" square completely black, while the others that have stars being slightly grayish, that square becomes more apparent). Samsung chooses to lower the brightness of stars as a compromise. 480 zones is a high number relative to many other sets, but realistically, I'd think we'd need thousands of zones before native contrast becomes less important than local dimming contrast.
Another thing to consider: if native contrast is reduced, then color gamut/volume could
also be reduced. If more backlight is bleeding through on a pixel that should be black, then it stands to reason that more green and blue is bleeding through those subpixels on a pixel that should be red. Now that we know the Q90 has less native contrast than the Q9FN, that explains why it also has a little less color gamut & volume.
All that to say, while the Q90 is a great FALD set, native contrast is still relevant. But there are still MANY other factors that are also relevant. The fact that the Q90 controls its zones better than the Q9FN is not one to be ignored.