In the discussion about image quality, the conversation almost always begins with the issue of black depth and contrast, which are parameters that define the plasticity and realism of the observed world. Here, the TCL P7k/P79k immediately lays its strongest asset on the table – a VA panel. Its construction is what makes the native relation between the brightest and darkest parts of the image more than satisfactory, especially in the context of the price segment that this model represents. In the majority of scenes, the black achieved has a noble depth, which allows for building an engaging spectacle for the viewer. To illustrate the scale, it is worth mentioning that competing constructions based on IPS panels often offer results that are even four times, and sometimes five times, lower, which in direct comparison represents a chasm. Of course, when entering the territory of models oriented towards affordability, we must be aware of certain compromises. Therefore, we will not find an advanced local dimming system in the discussed television, which could further enhance the sense of contrast. However, the absence of this feature is fully understandable and constitutes a logical consequence of positioning the product 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 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.