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.
LG MRGB85 uses a VA panel, so even without additional measures it offers better black levels than models based on IPS or ADS panels. In simpler scenes the image has decent depth and can look quite convincing. The biggest limitation appears, however, when local dimming is enabled. The TV uses an edge-lit backlight positioned at the bottom of the screen. As a result it cannot precisely control the brightness of small parts of the picture. When a single bright element appears on a dark background, an entire vertical band often lights up. This is accompanied by a distinct halo, and even more noticeable is the backlight's behaviour itself. When scenes change, brightness can jump up and down sharply, causing the image to noticeably pulse in a dark room. Local dimming can be turned off completely in the TV menu. Contrast then drops noticeably, but the image becomes much more stable and the frequent flicker of the backlight disappears. In practice some users may therefore willingly give up deeper blacks in favour of a calmer, more predictable picture.