When it comes to image dynamics and brightness, the QNED80A keeps its feet firmly on the ground. It’s not a "light beast" – during our measurements, peak luminance hovered around 350-400 nits. To put it bluntly: these are values that won't fully unleash the potential of HDR formats. So don’t expect the glare of the sun or car headlights in films to blind you. However, this television has a powerful ace up its sleeve that saves the overall image quality – it's the colours. LG engineers have employed an advanced filtration system (technically based on phosphor PFS, marketed as QNED/NanoCell), which does a fantastic job. Thanks to this, despite average brightness, the screen can generate exceptionally saturated and pure colours. Our instruments showed coverage of the wide cinematic DCI-P3 colour gamut at around 93-94%. This is a result that outclasses most standard LCD televisions. In practice, this means that when watching 4K HDR content, the image – although not very bright – is very vivid, lively, and delights the eye with its depth of colours.
The Samsung S90H in the WOLED variant is still an exceptionally bright TV for its price bracket, although it is slightly dimmer compared with the QD-OLED version. That difference is not as pronounced as in last year’s F series, where gaps sometimes reached 500 nits. Here the parameters of both panels are very similar, with differences in peak brightness of only about 100–150 nits. In small-window measurements the S90H with the WOLED panel easily reaches close to 1,500 nits. That headroom lets it phenomenally convey the dynamics of HDR effects — blooms, light reflections and explosions have the right punch, exactly as intended by the studio creators. As with most OLED displays, when a very bright scene fills the entire screen, panel protection systems kick in and brightness naturally falls to around 700 nits. It’s worth stressing that this is still an excellent result on the market, often noticeably better than many Mini LED screens in the same segment.
Colour gamut coverage
The biggest difference between the two S90H variants lies in colour reproduction and saturation. This stems directly from the different construction of the WOLED panel, which uses an additional white subpixel. As a result, very high-brightness colours don’t achieve quite the same saturation, and the wide-colour volume is slightly more limited than with QD-OLED. That said, in everyday use these differences will be hard for most viewers to notice. Our measured DCI-P3 coverage on the WOLED panel reaches almost 99%, meaning that for the vast majority of real film scenes both variants will present an almost identical image. The real gap only appears in rarer, especially demanding productions that use the ultra-wide BT.2020 gamut. Because of the WOLED panel’s construction, coverage of that standard is roughly 15% lower compared with the S90HAT with a QD-OLED panel, so the brightest, heavily lit HDR colours may appear a touch less vivid.