TCL P7K / P79K vs LG UA75006LA (IPS)

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%.

The situation is even more modest in the IPS version, where the peak brightness reaches only 250 nits. In practice, this means that there can be no real sense of HDR effect, and the materials being viewed resemble ordinary SDR. Similar to the VA case, the image behaves stably on most test screens, but in demanding scenes with fine details, the television tends to slightly dim the image. As a result, blacks appear somewhat better, but at the cost of losing detail in bright elements. The lack of additional color filters is also noticeable here. The UA7500 in the IPS version does not belong to QLEDs or PFS LED panels, and the DCI-P3 color gamut stops at 80%, which means that HDR films present themselves without much color depth and give the impression of being heavily flattened.

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.

The Filmmaker mode on the LG UA7500 performs better than one might expect from such a budget TV, but let’s not get carried away with enthusiasm. The picture is fairly well put together and at first glance does not offend, but its weaknesses quickly start to show. This is most evident in scenes with bright points — background lamps or light reflections on the skin are clearly overemphasized. The faces of the characters often look unnatural, as if they have been "blown out." Additionally, the default gamma characteristic brightens the smallest details and causes the image to lose subtlety in darker areas. That said, given its price range, the UA7500 in factory mode provides a pretty decent starting point. However, it is clear that without additional adjustments, these problems cannot be avoided, which is why — as with other TVs — we decided to check what could be achieved after calibration.

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.

The biggest improvement we noticed was when calibrating the mode designed for everyday SDR content. We managed to smooth out the white balance in an acceptable way and tackle the problem of excessive brightening of small elements due to the gamma characteristic. As a result, the image gained consistency and naturalness that was lacking in the factory settings. After such correction, we can confidently state that for everyday television content, programs, or materials from YouTube, the LG UA7500 performs really well – especially after professional calibration. The situation is somewhat different for HDR content. Here, calibration allowed us to tame the white balance and slightly improve brightness management, but the limitations of the design are immediately apparent. The lack of additional filters to broaden the color palette makes the most vibrant colors appear flat, and the image lacks the intensity we would expect from good HDR. So, in SDR, the UA7500 performs quite well, but in HDR – despite corrections – it remains far behind, and this is a feature one has to come to terms with when choosing this television.

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.

The version with the IPS matrix performed significantly worse here. Image scaling was uneven – this was particularly noticeable in lower-quality materials, where edges became jagged and the image looked less detailed. At times, there was also a sense of slight blurriness that detracted from sharpness and made the overall presentation seem less polished than in the VA version. The tonal smoothing function turned out to be a lifesaver. At the medium setting, it worked very well – it didn't ruin the image with excessive softening, while smoothing out colors in such a way that everyday content gained consistency. The difference was especially visible with television programs or streaming materials of poorer compression quality, where the television with the function enabled presented itself much better. This is one of those features that is worth keeping active because it significantly enhances the reception of everyday materials.

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.

LG UA7500 is a television with a 60 Hz panel, so it's difficult to expect any excitement in this category. It's more of a screen intended for everyday content or an evening movie session rather than for following dynamic sporting events or playing action games. It's clear that the manufacturer designed this model specifically for that group of viewers – and in that regard, it works properly. We have access to the TruMotion feature, which is a motion smoother. It's simple, with just one slider, but it can make a noticeable difference. At lower settings, the picture looks more raw and cinematic, while at higher values, the motion becomes smoother and more pleasant to the eye.

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.

LG UA7500 is a television that can be confidently recommended for "casual" gamers. While it lacks a 120 Hz panel and HDMI 2.1 ports, making full use of the potential of modern consoles out of the question, the manufacturer has included a few additions that can enhance the gaming experience. Notably, the Game Bar deserves mention – a very nicely designed panel that allows quick access to and modification of the most important settings. From this panel, we have access to features such as ALLM mode (automatic switching to game mode) and frame synchronization, which is VRR. The range of VRR is limited – it operates from 48 to 60 Hz – but the mere presence of this feature in such an affordable television is impressive.

Additionally, it supports HGiG, which is a calibration mode for HDR specifically for gaming. This sounds good, but based on testing experience, we already know that in the case of the UA7500, this option doesn't make much sense. The television doesn't handle HDR very well, so paradoxically, we achieved better results with this feature turned off. This is another signal that the UA7500 is more of a screen for occasional gamers who value simplicity and comfort rather than for those looking for a complete experience from the latest consoles.