QN80F is a representative of the Neo QLED series, meaning it is a television with Mini LED backlighting. Unlike its cheaper cousin, the QN70F model, the diodes here are placed directly behind the panel (rather than at the edges), which gives it a solid advantage right from the start when it comes to contrast control. In the 65-inch variant we tested, we counted 88 dimming zones – a result that may not be particularly impressive, but as it turned out, sufficient to achieve quite decent results.
In tests based on scenes from films such as Oblivion and The Meg, the QN80F performed well – blacks were deep, and the overall image consistency was visually appealing. However, in more demanding moments (e.g., scenes with a large number of bright details on a dark background), a halo effect appeared. This is where the limitation of the number of zones becomes evident – bright elements could bleed into one another, and some details in the dark areas lost visibility. In one scene featuring a helicopter (The Meg), we even noticed slight brightness flickering, as if the television was trying its best to maintain detail visibility at the expense of black depth.
However, these issues are not exclusive to this model – halo effects or drops in contrast during very complex scenes are challenges faced by most Mini LED televisions, even the more expensive ones. In its class, the QN80F performs positively and offers significantly better contrast than the QN70F model with edge backlighting. For most users, this will be a level more than sufficient – although not perfect.
If we compare the contrast results of this year's QN90F with last year's QN90D, it quickly becomes clear that the differences are minimal. In the best film scenes, the contrast can reach values well over six figures, and sometimes even seven figures, which can be confidently considered as results almost infinite. And indeed – in typical cinematic shots, the effect closely resembles that known from OLED televisions. Samsung deserves praise because, despite the relatively "modest" number of dimming zones – 504 in the 55-inch variant (modest compared to Chinese competitors like Hisense U8Q or TCL C8K/C9K) – they have managed to fine-tune the local dimming algorithms. This is particularly evident in the most challenging scenes, where compared to last year's model, the precision of dimming has nearly doubled. Of course, we still do not have perfectly separated bright objects from black, and one cannot speak of an absence of halo effects (slight glows around small bright objects) known from MINI-LED televisions, so with OLEDs, the QN90F still does not win. But it is definitely closing the gap in a more mature and refined way than the year before.