The QN70F is equipped with a VA panel that offers high native contrast – this is already a good starting point for blacks, especially for evening viewing. But theoretically, this does not end its capabilities. The television is branded as Neo QLED, which means the presence of Mini LED technology and a local dimming system. And indeed – the QN70F has such a function. The problem is that we are not talking about classical local dimming with LEDs placed directly behind the panel. Instead, edge lighting is used with a full-screen dimming mechanism known as global dimming. The effect of this is that instead of selective brightness control in individual zones, the entire screen is slightly dimmed when a dark scene appears. In practice, this means that the contrast is average compared to Mini LED models that offer true local dimming. The black level is not bad – it's thanks to the VA panel itself – but we cannot speak of precise light control that advanced systems with multiple zones provide. And here comes the question: is the QN70F series television really a Mini LED TV, or just a marketing variation on the Q70 series? Looking at the technical aspects – it is hard to consider this model a full-fledged representative of this technology. However, in everyday use, the black level looks decent and may be fully satisfying for many people.
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.