TCL P7K / P79K vs Hisense U7Q

When evaluating the HDR effect, we must make it clear and without marketing embellishment: the P7K/P79K is not and was never meant to be a master in this field. The maximum peak brightness that this panel can generate is only around 300 nits. This is a borderline value, a sort of thin red line between what can be considered a barely satisfactory HDR signal and what is really not much different from standard dynamic range (SDR), unfortunately leaning towards the latter. Synthetic tests found brutal confirmation in reality – our measurements taken during movie screenings showed that luminance in key bright parts of the content rarely exceeded the threshold of 200-250 nits. Therefore, this is not a television that would allow content produced in a wide tonal range to truly shine, and we must openly acknowledge that.

Unfortunately, the issue of color reproduction is presented equally restrained. Although the manufacturer positions this model in the "QLED" family, thanks to the use of a PFS LED filter, the results do not match the heightened expectations. The coverage of the wide DCI-P3 color gamut is only 86%. Compared to the market, this is at best an average result, as most devices that employ additional layers to expand the color spectrum easily achieve values at a minimum level of 90-92%.

Since the algorithms responsible for blacks are performing quite well, we expected a similarly good effect when it comes to brightness and overall HDR quality. Unfortunately – here we have to disappoint you a bit.

The U7Q is quite a bright TV – in optimal conditions, it can reach around 800 nits, which indeed impresses on some screens, especially in scenes like those from the movie The Meg. Bright segments can really shine, and the HDR effect is noticeable. The problem arises when very small, bright elements appear on a dark background – for example, in Sicario 2 or in the second scene of the movie Life of Pi. In such moments, the dimming algorithms operate too aggressively. Yes, the blacks look great then, but the brightest points can almost completely fade, causing the HDR effect to disappear and details to be barely visible. That's just the nature of this technology in this price segment.

As a consolation, it's worth adding that the U7Q is advertised as a QLED TV (in practice, a PFS layer is used, which works very similarly), and it is indeed capable of displaying a wide color palette – with DCI-P3 coverage at around 94%, that's a very good result for this class.

Every reliable image quality assessment must begin by selecting the most optimal factory mode. In the case of the tested model P7K/P79K, the choice was confidently made for the "Film" mode. It is this mode that presents an image closest to the creators' intentions, avoiding both the exaggerated brightness of dynamic mode and the excessive dimming known from eco settings. And it must be admitted that, for a device in this price range, the factory calibration is surprisingly decent, although it is not free from a few stumbles. The most noticeable flaw turned out to be an imperfectly adjusted white balance. A slight dominance of the blue component gives the image a subtly cool, chilly character, thus deviating from the exemplary neutrality that the director wanted to show us. The television performs much better in reproducing the grayscale in a standard dynamic range – the gamma curve is executed almost perfectly. A minor reservation can only be made for the darkest parts of the image, where a slight deviation from the norm causes a loss of some detail in the shadows. The most serious challenge for TCL's software, however, was the interpretation of the HDR signal, which is illustrated by the EOTF curve. The television follows its own, rather free path here – the darkest details are disproportionately brightened, followed by a noticeable slowdown in brightness increase for midtones. Fortunately, most of these imperfections are software-related issues that can be eliminated. With this thought in mind, we proceeded to the professional calibration process.

We tested the U7Q in the best possible picture mode, which is Filmmaker Mode. This mode is supposed to provide the most "filmic" experience and fidelity to the creators' intent – right out of the box. Unfortunately, even this professionally sounding name does not guarantee a perfect picture.

In our unit, the problem lay in a poorly set white balance. Both in HD and 4K content, the image had too much blue and red, giving the screen a slightly pinkish hue. It didn't look terrible, but it was noticeable – especially in bright scenes and white backgrounds. This alone could have been forgiven, but the biggest issue is the management of brightness in HDR content. The EOTF curve from the measurements confirms what we saw earlier during the scene tests: the television often dims the smallest bright elements too much, causing them to almost disappear, or conversely – excessively brightens the brightest ones, affecting the naturalness of the image.

The calibration process turned out to be a home run, especially in the context of standard dynamic range (SDR) content. We successfully managed to eliminate the TV's tendency to emphasize cool tones, restoring the whites to their natural neutrality. Furthermore, precise adjustments allowed us to correct a slight error in the gamma curve, so the darkest areas of the image regained their proper depth, without a trace of unnatural brightening. The effects are measurable and impressive – in the ColorChecker test, the vast majority of color reproduction errors fell below the perceptual threshold, achieving a deltaE value below 2. This is a result that would not shame much more expensive constructions. Unfortunately, in the case of HDR content, we hit a wall in the form of the inherent limitations of the panel itself. And although we managed to bring the colors in line, the software's specifics mean that the TV still adapts brightness in its own way, as evidenced by the persistent, non-standard EOTF curve. In summary, calibration brings tremendous added value, but one must be aware that it cannot overcome certain physical barriers. A slight boost in black levels, resulting from the lack of local dimming, and limited peak brightness mean that HDR content will not always be able to showcase its full potential. This is simply not the main task of this display; its true strength, especially after professional tuning, lies in the viewing of SDR materials.

Thanks to specialized tools, we managed to correct the color quality in SDR content to nearly perfection. In materials with lower dynamics, delta E errors dropped below 0.5, which can be considered an almost reference result. The image on television, YouTube, or classic Full HD looks really good after calibration. Well, but where couldn’t we improve the image so easily? Primarily, it concerns HDR quality content. While we managed to somewhat "tame" the white balance and eliminate pink hues in most scenes, unfortunately, we did not have full control over brightness management. We set the local dimming settings according to the best observations – SDR: Medium, HDR: High – but the U7Q still did everything a bit its own way. There were still cases of overly strong dimming or brightening of details that the calibration simply couldn't eliminate. And although the overall reception of the content is much better, it must be taken into account that the U7Q will always have something to say at the end "but."

After a series of harsh evaluations, fortunately, the time comes for praise, and this is due to the TCL AiPQ image processor for its work in digital processing and content scaling. It should be noted right away that we are not talking about the level known from flagship designs; nevertheless, in the price segment represented by the P7K/P79K, the results achieved are more than solid. The feature that smooths tonal transitions performs particularly well, effectively eliminating posterization, which are the characteristic bands often visible in materials with higher compression, such as from the YouTube service. The algorithm can elegantly remove unwanted gradients, which ultimately looks really good. The television also competently handles upscaling, which is the task of raising low-resolution materials to 4K standard. The output image, although it may seem a bit too sharp out of the box, fortunately, is not a problem. The software allows for easy adjustment of this parameter using a sharpness slider, so the final appearance can be easily tailored to personal preferences.

There are situations where we would like to smooth out tonal transitions a bit, especially in older materials – those that have limited source quality. The U7Q is equipped with a feature called “Smooth and Gradient Image,” but unfortunately… it works very poorly. In the “Low” option, the effects are practically unnoticeable, and other settings smooth out details but do not improve tonal transitions. The only plus is that the feature does not interfere with film grain, so it does not ruin the natural structure of the image.

Fortunately, content scaling performs quite well. The image is not overly sharpened, there is no artificial clarity – and although it is known that this is not the level of high-end televisions, the U7Q handles displaying really old content in a completely acceptable manner without any problem.

The issue of fluidity and sharpness of the image in motion is inextricably linked to the fundamental parameter of the panel, and in the case of the TCL P7K/P79K, we are dealing with a panel that has a native refresh rate of 60 Hz. This specification already defines its capabilities and makes it difficult to unequivocally recommend it to enthusiasts of dynamic sports broadcasts. During rapid camera movements, the image loses sharpness, and the panel itself also shows a slight tendency to blur, which may be noticeable to more sensitive viewers. Fortunately, not everything in this aspect has been left to chance. The manufacturer has implemented a simple motion smoothing system, which is primarily used in film materials recorded at 24 or 30 frames per second. Thanks to a dedicated slider, the user can independently decide on the final character of the motion – from a fully cinematic, slightly juddery image to achieving a very smooth, almost theatrical effect. It is a simple yet effective tool that allows users to tailor the viewing experience to their own preferences.

U7Q is truly a fast television, similar to its more powerful version "PRO". At a resolution of 4K, it supports up to 144 Hz refresh rate, and if someone wants even more – in Full HD you can achieve up to 240 Hz! This will mainly benefit PC gamers, but it’s worth appreciating – this is a rare feature in this price segment. Right from the start, it’s clear that U7Q was created with dynamic content in mind, such as games or sports. In films, we are not left "out in the cold" either – U7Q offers the "Ultra Motion Smoothness" feature, where using two sliders you can adjust whether you want a smoother, theatrical image, or something closer to a cinematic style with a visible frame. It’s good that, like with most manufacturers, we have a choice here and can adjust it to our own preferences.

Although on paper the native 4K@60Hz matrix might suggest that the TCL P7K/P79K is not a TV tailored for gamers, the reality turns out to be surprisingly different. On the contrary, the manufacturer has ensured a rich package of features that make it a very friendly companion for next-generation consoles. Onboard, we find key technologies such as ALLM, which provides automatic switching to low-latency mode, and VRR, or variable refresh rate, which eliminates screen tearing. The list is completed by support for Dolby Vision Gaming and a simple yet functional Game Bar. However, the real and extremely pleasant surprise is something else. It turns out that the TV easily supports high refresh rate signals of 120 Hz, but at lower resolutions – 1080p and 1440p. This is fantastic news for console owners who know full well how rarely games run in native 4K at a full 120 frames per second. The ability to choose between higher resolution and doubled smoothness is therefore an extremely sensible compromise.

In summary, although the P7K/P79K may not be the target screen for the most avid tournament gamers, it offers a package of options for the casual or occasional console user that is hard to find among many competitors at this price point.

The Hisense U7Q is a TV designed for gamers – and you can see that right away based on its gaming capabilities. It has practically everything you could wish for: variable refresh rate (VRR) – check, automatic game mode (ALLM) – also check, and high refresh rates of up to 240 Hz in Full HD, as well as support for various resolutions, not just 4K. It's truly a great set of features that makes the U7Q excel in both fast-paced shooters on consoles and more demanding titles on PC. Of course – like in most Hisense models – it lacks a proper implementation of the HGiG function. That's a shame because HGiG allows you to adjust the brightness of the console to the specific TV, which in practice makes displaying HDR games according to the creators' intentions much easier. Without this, you simply have to reckon with certain limitations in the final HDR image in games.