TCL P7K / P79K vs LG UA75006LA (IPS)

When turning to the assessment of HDR performance, we must be clear and without marketing embellishments: the P7K/P79K is not, and was never intended to be, a master in this field. The maximum peak brightness that this panel can generate hovers around a mere 300 nits. This represents a threshold, a kind of thin red line between what can be considered a barely satisfactory HDR signal and what is, in fact, 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 portions of the scenes rarely exceeded the ceiling of 200-250 nits. Thus, this is not a television that would allow content realised in a wide tonal range to spread its wings, and this must be openly admitted.

Unfortunately, the issue of colour reproduction is presented with equal restraint. Although the manufacturer positions this model within 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 colour gamut reaches only 86%. In the context of the market, this is at best an average result, as most devices that employ additional layers to expand the colour spectrum easily achieve values at a minimum level of 90-92%.

The version with an IPS panel looks even more modest, where the peak brightness barely reaches 250 nits. In practice, this means that a real sense of HDR effect is out of the question, and the materials viewed resemble rather ordinary SDR. Similar to VA panels, the image behaves stably on most test patterns, but in demanding scenes with fine details, the television has a tendency to slightly dim the image. This allows for slightly better blacks; however, this comes at the expense of losing detail in bright elements. The absence of additional colour filters is also noticeable here. The UA7500 with an IPS panel does not belong to QLEDs or PFS LED panels, and the DCI-P3 colour gamut is limited to 80%, meaning that HDR films lack significant colour depth and appear quite flattened.

Every accurate assessment of image quality must begin with selection of the most optimal factory mode. In the case of the tested model P7K/P79K, the choice was made without hesitation for the "Film" mode. It is this mode that presents an image closest to the intentions of the creators, avoiding both the exaggerated brightness of the 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 has not escaped a few missteps. The most noticeable flaw turned out to be the not completely correctly set white balance. A slight dominance of the blue component gives the image a subtly cool, cold character, thus deviating from the exemplary neutrality that the director wanted to show us. The television performs much better in reproducing the greyscale in the standard dynamic range – the gamma curve is nearly exemplary. The only minor reservation could be made regarding 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 the TCL software, however, was interpreting the HDR signal, as illustrated by the course of the EOTF curve. The television follows its own, quite free path here – the darkest details are disproportionately brightened, after which there is a noticeable slowdown in the increase of brightness for midtones. Fortunately, most of these imperfections are software-related issues that can be eliminated. With this thought in mind, we began the process of professional calibration.

The Filmmaker mode on the LG UA7500 performs better than one might expect from such a budget television, but let's not get carried away with praise. The picture is quite well put together and does not irritate at first glance, but its weaknesses soon start to show. This is most evident in scenes with bright points – lamps in the background or reflections of light on the skin are distinctly overemphasised. Characters' faces often appear unnatural, as if they have been 'overexposed'. Additionally, the default gamma setting brightens even the smallest details, causing the image to lose subtlety in darker areas. However, it remains true that for its price bracket, the UA7500 in factory mode offers a fairly decent starting point. It is clear that without additional adjustment, it will not be possible to avoid these issues, which is why – as with other televisions – we decided to see what could be achieved after calibration.

The calibration process turned out to be spot on, particularly in the context of standard dynamic range (SDR) content. We successfully mitigated the television's tendency to emphasize cool tones, restoring the whiteness to its natural neutrality. Moreover, precise adjustments allowed us to correct a slight error in the gamma curve, ensuring that the darkest parts of the image regained their proper depth, without any trace of unnatural brightness. The effects are measurable and impressive – in the ColorChecker test, the overwhelming majority of colour reproduction errors fell below the perceptual threshold, achieving a deltaE value of under 2. This is a result that pricier models would not be ashamed of. Unfortunately, when it comes to HDR content, we encounter a barrier in the form of the inherent limitations of the panel itself. And although we managed to bring the colours into line, the software's characteristics mean that the television still adapts brightness in its own way, as evidenced by the persistent, non-standard EOTF curve. In summary, calibration adds immense value, but one must be aware that it cannot overcome certain physical barriers. The slightly elevated black level, due to the lack of local dimming, along with limited peak brightness, means that HDR content may not always be able to showcase its full potential. This is simply not the primary task of this display; its true strength, especially after professional tuning, lies in the viewing of SDR material.

The greatest improvement we noticed was during the calibration of the mode intended for everyday SDR content. We managed to smooth out the white balance in an acceptable way and control the issue of excessive brightening of fine details due to the gamma characteristics. As a result, the image gained the consistency and naturalness that was lacking in the factory settings. After this correction, we can confidently state that for everyday television content, programmes, 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 evident. The lack of additional filters expanding the colour palette means that the most vibrant colours appear flat, and the image does not have the intensity one would expect from good HDR. Therefore, in SDR, the UA7500 performs quite well, but in HDR – despite the corrections – it remains far behind, and this is a feature one must accept 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 the field of digital processing and content scaling. It should be noted right away that we are not talking about the level known from flagship designs; however, in the price segment represented by the P7K/P79K, the results achieved are more than solid. The feature for smoothing tonal transitions performs particularly well, effectively eliminating posterisation, which are the characteristic bands often visible in highly compressed materials, for example, from the ChooseTV service. The algorithm adeptly removes unwanted gradients, which ultimately looks really good. The television also handles upscaling competently, which is the task of elevating low-resolution materials to 4K standard. The resulting image, although it may initially seem a bit too sharp, fortunately, is not a problem. The software allows for free adjustment of this parameter using a sharpness slider, making it easy to customise the final appearance to personal preferences.

The version with the IPS panel performed noticeably worse here. Image scaling was uneven – this was particularly evident in lower quality materials, where edges became jagged and the image appeared less detailed. At times, there was also a slight blur that diminished sharpness and made the overall impression seem less refined than in the VA version. The solution proved to be the tonal transition smoothing function. On the medium setting, it worked very well – it did not spoil the image with excessive softening, while simultaneously smoothing colours in such a way that everyday content gained coherence. The difference was particularly noticeable with television programmes or streaming materials with poorer compression quality, where the television with the function on presented itself much better. This is one of those additions that are worth keeping active, as they significantly enhance the experience of daily content.

The issue of fluidity and sharpness of the image in motion is inextricably linked to a fundamental parameter of the matrix, and in the case of the TCL P7K/P79K, we are dealing with a panel with a native refresh rate of 60 Hz. This specification defines its capabilities from the outset and makes it difficult to unequivocally recommend it to enthusiasts of dynamic sports broadcasts. During fast camera movements, the image loses sharpness, and the panel also shows a slight tendency to smearing, 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 material recorded at 24 or 30 frames per second. Thanks to a dedicated slider, users can decide for themselves the final character of the motion – from maintaining a fully cinematic, slightly juddery image to achieving a very smooth, almost theatrical effect. It is a simple but 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 is difficult to expect much excitement in this category. It is rather a screen designed for everyday content or an evening film screening rather than for following dynamic sports events or playing action games. It is clear that the manufacturer aimed this model at this group of consumers – and in this regard, it performs adequately. We have the TruMotion function available, which is a motion smoother. It is simple, has only one slider, but can make a noticeable difference. At the lower range, 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 panel might suggest that the TCL P7K/P79K is not a television tailored for gamers, the reality is 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 complemented 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 television easily supports a high refresh rate signal of 120 Hz but at lower resolutions – 1080p and 1440p. This is fantastic news for console owners, who know 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 passionate tournament players, for the casual or occasional console user, it offers a package of options that is hard to find among many competitors at this price.

LG UA7500 is a television that can be confidently recommended to "casual" gamers. While it lacks a 120 Hz panel and HDMI 2.1 ports, so fully utilising the potential of modern consoles is out of the question. However, the manufacturer has included a few features that can enhance the gaming experience. Noteworthy is the Game Bar – a very well-designed panel where you can quickly preview and change the most important settings. From this panel, we have access to various features, including the ALLM mode (automatic switching to game mode) and frame synchronisation, namely 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 leaves a positive impression.

Additionally, there is support for HGiG, which is the HDR calibration mode for gaming. This sounds good, but from our testing experience, we know that in the case of the UA7500, this option is not particularly useful. The television does not perform very well with HDR, so paradoxically better results were achieved with this mode turned off. This is another signal that the UA7500 is more of a screen for occasional gamers who value simplicity and convenience rather than for those seeking a full immersion experience with the latest consoles.