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.
Samsung M80H is an LCD TV that, according to the manufacturer, uses a Mini-LED backlight. It may indeed use smaller LEDs placed directly behind the screen, but it is not the same type of Mini-LED found in more expensive TVs. The M80H does not have local dimming, so the backlight cannot independently control the brightness of individual parts of the image. Black levels are quite decent, mainly thanks to the VA panel used. Depending on the scene, the contrast we measured was roughly 5,500:1 to over 8,000:1. For a TV without local dimming these are good results, and it is precisely in such designs that VA panels have a considerable advantage over IPS/ADS panels. It is worth noting that some results exceed the panel’s native contrast, which is around 5,000:1. Samsung has implemented a global dimming function. When there is a lot of black on the screen, the TV dims the entire backlight, making dark areas appear deeper. However, this comes at the expense of the brightness of the rest of the image. So the M80H will not significantly brighten a small bright spot while maintaining deep blacks around it, as it dims or brightens the whole screen.