In discussions about image quality, the conversation almost always begins with the issue of black depth and contrast, which are parameters defining the plasticity and realism of the viewed world. And here, the TCL P7k/P79k immediately lays its strongest advantage on the table – a VA-type panel. It is its construction that ensures the native relationship between the brightest and darkest parts of the image is more than satisfactory, especially in the context of the price segment this model represents. In the majority of scenes, the achieved black has a noble depth, which allows for building an engaging spectacle for the viewer. To illustrate the scale, it's worth mentioning that competing constructions based on IPS panels often offer results that are even four or sometimes five times lower, which constitutes a chasm in direct comparison. Of course, as we venture into the territory of budget-oriented models, we must be aware of certain compromises. Thus, in the discussed television, we will not find an advanced local dimming system that could further enhance the impression of contrast. The absence of this feature is, however, fully understandable and constitutes a logical consequence of the product's positioning in the market – this technology in TCL's portfolio for 2025 has been reserved for higher-positioned, more prestigious series marked with the letter "C".
TCL C7L is a Mini LED TV, which in the 65-inch variant we tested, is equipped with over 1000 local dimming zones. This, combined with the proprietary VA panel (called HVA 2.0 by TCL CSOT), delivers really decent results in terms of black levels and contrast. In most of the scenes we measured, the blacks and contrast looked really good, and in the easiest shots, the black was deep enough to almost resemble that seen on OLED screens. This is of course referring to the least demanding shots with a lot of black on the screen. However, when more bright elements appear on the screen, and black stops dominating as much, it is evident that TCL C7L – like most Mini LED TVs – has its issues with local dimming zone management.
This can be clearly seen, for example, on the black bars in films shot in the 2.35:1 panoramic format. Then, on the black bars or around small, bright objects, a pronounced halo effect, or a bright light glow, can appear. 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’s worth remembering that this shouldn’t be treated as a flaw of the TV but rather as a characteristic of mini-LED technology. Of course, this effect becomes much less bothersome when we turn on at least some light in the room… which I definitely recommend doing during screenings on any LCD TV.