Samsung U8000F, more specifically model U8092F in the 55-inch version, is equipped with an IPS panel. Let's be honest – this is not the best choice when it comes to properly displaying black levels and contrast. The results in this category are simply weak. The contrast is abysmal, and watching dark scenes with any kind of "cinematic" effect is nearly impossible. Additionally, the fact that the television lacks local dimming does not help, making it difficult to achieve better results. The only thing worth praising is the fairly decent uniformity of the panel – but that's more of a minor consolation. Overall, it's not good. If you value deep blacks and reasonable contrast, it is definitely better to opt for the variant with a VA panel, which performs significantly better in this particular series.
TCL C7L is a Mini LED television, which in the 65-inch variant we tested, is equipped with over 1000 local dimming zones. This, combined with the proprietary VA panel (referred to by TCL CSOT as HVA 2.0), yields truly decent results in terms of blacks and contrast. In most of the scenes we measured, the black levels and contrast looked really good, and in the easiest shots, the black was deep enough to almost resemble that seen on OLED screens. Of course, we are talking about the least demanding shots with a lot of black on the screen. However, when a greater number of bright elements appear on the screen and black no longer dominates as strongly, it is apparent that the TCL C7L – like most Mini LED televisions – has its issues with managing local dimming zones.
This is particularly evident in the black bars in films recorded in the 2.35:1 widescreen format. At that point, a distinct halo effect, or bright light glow, can appear on the black bars or around small, bright objects. The contrast then drastically dropped – from laboratory values of around 200,000:1 to about 10,000:1, which is quite noticeable in a completely dark room. It is worth remembering that this should not be treated as a flaw of the television, but rather as a characteristic of mini-LED technology. Of course, this effect becomes significantly less bothersome when we turn on at least some soft, diffused light in the room... which I definitely recommend doing during screenings on any LCD television.