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 (instead of at the edges), which gives a solid advantage 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 very impressive, but as it turned out, sufficient to achieve quite decent results.
In tests based on scenes from films such as Oblivion or 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 large number of bright details on a dark background), a halo effect appeared. This is where the limitation of the number of zones comes into play – bright elements could bleed around, and some details in dark areas became less visible. In one scene with a helicopter (The Meg), we even noticed slight brightness flickering, as if the television was trying its best to maintain visibility of the details at the expense of black depth.
However, these are not issues exclusive to this model – the halo effect or contrast drops in very complex scenes are something that most Mini LED televisions struggle with, even the more expensive ones. In its class, the QN80F still performs positively and offers noticeably better contrast than the QN70F model with edge lighting. For most users, this will be a level more than sufficient – although not perfect.
LG MRGB85 uses a VA panel, so even without extra tricks it offers better blacks than models based on IPS or ADS panels. In simpler scenes the picture has decent depth and can look quite convincing. The biggest limitation, however, appears when local dimming is turned on. The TV uses edge lighting positioned along the bottom of the screen. As a result it can't precisely control the brightness of small areas of the image. When a single bright element appears on a dark background, it often lights up an entire vertical band. This is accompanied by a noticeable halo, and even more noticeable is the behaviour of the backlight itself. When scenes change the brightness can jump up and down suddenly, causing the picture to visibly pulse in a dark room. Local dimming can be completely switched off in the TV's menu. Contrast then drops noticeably, but the picture becomes much more stable and the frequent backlight flicker disappears. In practice, some users may therefore consciously give up deeper blacks in favour of a calmer, more predictable picture.