QN80F is a representative of the Neo QLED series, which means it's a television with Mini LED backlighting. Unlike its cheaper cousin, the QN70F model, here the diodes are placed directly behind the panel (rather than at the edges), which gives a solid advantage in contrast control right from the start. In the 65-inch variant we tested, we counted 88 local 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 movies like Oblivion and The Meg, the QN80F performed well – blacks were deep, and the overall image consistency was eye-catching. However, in more demanding moments (e.g., scenes with a lot of bright details on a dark background), a halo effect appeared. This is where the limitation of the number of zones shows – bright elements could bleed into each other, and some details in dark areas lost sharpness and contrast. In one of the helicopter scenes (The Meg), we even noticed a slight flicker in brightness, as if the television was trying its best to maintain visibility of details at the expense of black depth.
However, these are not problems exclusive to this model – the halo effect or contrast drops in very complex scenes are something most Mini LED televisions struggle with, even the more expensive ones. In its class, the QN80F still performs positively and offers clearly better contrast than the QN70F model with edge lighting. For most users, this will be a level more than sufficient – though not ideal.
Moving on to what is most important in Mini-LEDs, namely contrast and black levels, the Sharp JP7 in the 55-inch size we tested utilizes a VA panel. Combined with backlighting split into 160 zones (in a 10x16 configuration), this promises truly solid performance. Measurements on static film test images can be downright shocking, with measured contrast reaching five-digit values, even hitting levels of 50,000:1. On paper, this is a result that much more expensive models would not be ashamed of, and black levels under these conditions look very attractive.
Unfortunately, a television is purchased for watching films, not for admiring static images, and this is where the charm wears off a bit. When something more starts happening on the screen—especially in complicated, dark scenes with a lot of small bright elements—the backlighting system in the JP7 begins to literally go haywire. The zones can "dance" before the viewer's eyes, turning on and off in a way that can be simply annoying and detracts from the action. It is clear that Sharp has a huge room for improvement regarding local dimming management. The hardware potential in the form of Mini-LEDs is significant, but the controlling algorithms clearly struggle to tame them.