TCL C855 vs Hisense U7Q

TCL C855 delivers a highly varied HDR effect. On one hand, the television truly shines, while on the other, it resembles a lower model with FALD backlighting. Such a state of affairs is regularly observed with this brand, so it was not a surprise for us. The first and last scene, which has large light elements, looks phenomenal, "shining" with brightness levels of 1470 and 1820 nits respectively. Such effects will certainly make many people squint, while simultaneously feeling the extraordinary dynamism of the scene itself. You can truly feel as if you were inside the movie. The situation drastically changes when small or minor elements with high luminance surrounded by black appear on the screen. The TCL C855, to avoid the halo effect, significantly reduces brightness to a level of even 240 nits, which is a disappointing outcome, causing the film to not look like it was shot in HDR. The HDR effect in TCL C855 makes watching dynamic scenes more engaging, and the viewer can feel like they are part of the action. Even with smaller elements of high luminance, the television manages to maintain details without excessive dimming. Moreover, the TCL C855 test shows that the brightness of the image is adapted to scenes with a large amount of detail, increasing viewing comfort.

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

The U7Q is quite a bright television – under the best conditions, it can reach around 800 nits, which indeed impresses in some scenes, especially in scenes like those from the movie The Meg. Bright segments can 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 from Life of Pi. At such moments, the dimming algorithms operate too aggressively. Yes, the blacks look great at that point, but the brightest spots can almost completely disappear, causing the HDR effect to vanish and details to be barely visible. That’s just the charm of this technology in this price segment.

As a consolation, it is worth mentioning that the U7Q is marketed as a QLED (in practice, a PFS layer is used, which operates very similarly), and it can indeed display a wide colour gamut – a DCI-P3 coverage of around 94% is a very good result for this class.

The best factory mode for the TCL C855 is "Film," and it is on this mode that we conducted all our tests. However, like every mode predefined by the manufacturer, it had flaws that are worth correcting to achieve an image that is as close as possible to what the film producer intended. We will look at the colour characteristics in both SDR and HDR materials. Taking the former into account, we see a clear dominance of green in the white balance, which, as you might guess, gave an unpleasant greenish tint to the entire image. Examining a very important gamma chart, responsible for the contrast of the image, we see a significant deviation from the reference line marked at 2.4. From the left, we can observe a strong spike in the measured value, which at this point caused contrast exaggeration and blending of details into a dark blob. This state of affairs persisted for quite a while, up to 20% of the chart’s value, before then diving below the reference. This, in turn, meant that the image was brightened and contrast decreased significantly. The factory mode performed somewhat better in HDR materials, as the white balance looked quite good, except for the second half, where green again took over. Looking at the EOTF curve, which, unlike gamma, shows the rate of brightness increase, we see primarily two errors: the darkest scenes were too dark, and the brightest ones were overexposed. This, by the way, could be observed in the scene from the film "Pan" in the check paragraph for the TV's HDR.

We tested the U7Q in the best possible picture mode, which is Filmmaker Mode. This mode is supposed to provide the most "cinematic" experience that aligns with the creators' intentions – straight out of the box. Unfortunately… even this professionally sounding name doesn’t guarantee a perfect image.

In our unit, the problem lay in the poorly set white balance. In both HD and 4K content, the image had too much blue and red, resulting in a slightly pinkish hue on the screen. It didn’t look terrible, but it was noticeable – especially in bright scenes and on white backgrounds. That alone could have been forgiven, but the biggest issue is managing brightness in HDR content. The EOTF curve from the measurements confirms what we saw earlier during scene tests: the television can overly dim the smallest bright elements, causing them to nearly disappear, or conversely – excessively brighten the brightest parts, which affects the naturalness of the image.

TCL, just like the vast majority of manufacturers, provides advanced calibration tools in its televisions. Here we find 2- and 20-point grey scale adjustments as well as an advanced colour management system. The results, as you can see, are very good and in SDR materials we have significantly approached the reference image. We eliminated both the green tint and the gamma issue, although there is still a slight "kink" at the very beginning. It went a bit worse with HDR materials, which the television ChooseTV C855 did not allow us to model properly. We only managed to slightly adjust the EOTF curve and significantly improve the colours themselves.

Thanks to specialist tools, we managed to correct the colour quality in SDR content to almost perfection. In materials with lower dynamics, delta E errors dropped below 0.5, which can be considered an almost reference result. The picture on television, YouTube, or classic Full HD looks really good after calibration. Well then – but where was it not so easy to improve the image? Primarily it concerns HDR quality content. Although we managed to somewhat "tame" the white balance and eliminate pink tints 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 calibration simply could not eliminate. And although the overall reception of content is much better, one must reckon that the U7Q will always have something to say at the end with "but".

Once again, we will look at the function of smoothing tonal transitions, but this time also image scaling. The latter is particularly important when watching materials of lower quality, such as some TV programs or older films. We will focus on the function responsible for tonal transitions. Interestingly, just like in the scenes in the previous test, it performed splendidly and smoothed out practically all the choppiness, but here it had problems. Using the menu responsible for the operation of this function, we found that none - not even the strongest - setting helped.

The image scaling in TCL C855 is characterised as one of the best we have had the opportunity to test so far. The image is sharp, but in a way that could be described as natural to our eye. Even small, fine branches do not have jagged contours, and there is no white halo around figures, which is characteristic of weaker scaling systems.

There are situations where we would like to smooth out tonal transitions a bit, especially in older materials – those with limited source quality. The U7Q has been 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 the details but don’t improve tonal transitions. The only positive thing is that the feature doesn’t interfere with the film grain, so it doesn’t 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 while it’s known that this isn’t the level of high-end TVs, the U7Q has no problem displaying really old content in a completely acceptable manner.

The maximum refresh rate that we can set on TCL C855 is 144 Hz. Naturally, this is only possible when connecting the TCL C855 TV to a very powerful PC. Otherwise, we will operate at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sports or content with a high level of motion dynamics. For those who require high fluidity of image, the manufacturer has implemented a multi-level motion smoother. It has been divided into two separate sliders that adjust the sharpness of moving images (Blur Reduction) and judder (Judder Reduction). Both sliders can be set in the range of 0 to 10, with each level affecting the degree of smoothing, so everyone can find their sweet spot. We present a setting that allows for slight smoothness without the soap opera effect.

The panel of TCL C855 features a very good response time. This is especially important, as VA panels often have issues with so-called ghosting, which is the effect where a black halo can be noticed behind a fast-moving object.

U7Q is a truly fast TV, much like its more powerful version “PRO”. At 4K resolution, 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 – it’s a rare feature in this price segment. Right from the start, it’s clear that the U7Q has been designed with dynamic content in mind, such as games or sports. In films, we’re not left “out in the cold” either – the U7Q offers an “Ultra Motion Smoothness” feature, where with two sliders, you can adjust whether you want a smoother, theatrical picture, or something closer to cinematic style with a visible frame. It’s good that, like most manufacturers, we have a choice here and can customise it to our own preferences.

The TCL C855 television is equipped with full HDMI 2.1 ports with a bandwidth of 48 Gb/s. During our tests, we confirmed the seamless operation of all functions that come with this standard. As you can see, all the checkboxes light up green, which will certainly be appreciated by gamers, both console and those using the television as a computer monitor. Additionally, the TCL C855 supports both AMD FreeSync and NVIDIA's G-Sync, which can be easily activated in the graphics card settings. Users with very powerful setups can provide a 144 Hz signal to the C855, which the television handles effortlessly. It's also worth mentioning the implementation of the HGIG mode, which, due to the shortcomings of the "Game" mode, is overly bright, making it difficult to configure properly on-screen. Fortunately, the television performs excellently with the Dolby Vision format.

The TCL C855, as one of the first manufacturers, has equipped its televisions with a special GameBar feature that allows extensive setting changes on the fly, without the need to exit the game. It includes functions such as an additional crosshair grid, black level correction, and settings for individuals with disabilities. In the photo, we see the next generation of this solution.

In summary, the TCL C855 television will be an ideal solution for those looking for a screen for any kind of electronic gaming. With all the features supporting such entertainment, it is incredibly engaging. It should also be emphasized that it has very low input lag, regardless of the selected settings, including with the Dolby Vision HDR format.

The Hisense U7Q is a TV designed with gamers in mind – and you can see that straight away with its gaming capabilities. It has practically everything you could wish for: Variable Refresh Rate (VRR) – check, Auto Low Latency Mode (ALLM) – check, and high refresh rates of up to 240 Hz in Full HD, along with support for various resolutions, not just 4K. It’s truly an impressive set of features that makes the U7Q perform well with both fast-paced shooters on consoles and more demanding titles on PC. Of course – like most Hisense models – it lacks a proper implementation of the HGiG feature. It’s a shame because HGiG allows the console's brightness to be adjusted to the specific TV, which in practice makes it easier to display HDR games according to the creators' intentions. Without this, you just have to deal with some limitations in the final HDR image in games.