LG OLED C4 vs LG QNED93A / QNED90A

The results of HDR materials are definitely among the better ones. Practically every film significantly exceeds the 700 nits barrier, allowing for a very realistic image. Of course, none of them surpasses the magical thousand, yet the combination of such results and unlimited contrast and black effectively boosts the outcome optically. The last of the scenes, featuring a full-screen burst of sunlight, is actually less bright than the others, although it still represents a commendable level. It is also worth mentioning the excellent coverage of the DCI-P3 colour palette, which will allow for achieving extremely vivid colours.

Although the number of local dimming zones in the LG QNED93A has not directly translated to noticeably better contrast, it is hard to deny one thing about this model – it is brighter than its predecessor. In synthetic tests, we recorded values around 1400-1500 nits, and more importantly, these results are reflected in real film scenes. In full-screen sequences flooded with white or bright lights, the screen could maintain high luminance, which created a truly decent amazing HDR effect. Unfortunately, where the television could showcase true class, that is in scenes requiring precision, all the magic dissipates. The dimming algorithms, which we mentioned earlier, operate so aggressively that small bright objects – such as distant lights, stars, or the moon – can almost completely disappear. A glance at the test scenes from the film Pan or Sicario 2 (screens 2 and 4) shows how subtle details are dimmed to the limits of their visibility. It's a pity, as a greater number of zones could theoretically have led to significantly better results. Fortunately, there are also strengths. The QNED93A performs well in terms of colour gamut coverage, achieving around 96% of the DCI-P3 standard. As a result, colours in films appear vivid and full, and the picture does not lose intensity even in more demanding scenes. Therefore, one could say that the HDR in this model is solid, although the underdeveloped local dimming algorithms hinder its full potential.

The best factory mode implemented in the tested television was "Filmmaker". It was this mode that we used during all tests. This mode proved to be quite good in terms of colour reproduction; however, other shortcomings effectively detracted from the enjoyment of viewing. Starting with the most basic aspect, the white balance, it was easy to notice that it was marked by a dominance of red, which overall changed the characteristics of the image. We could thus see a strong yellowing of the whites and a shift of all colours towards warmer shades. The gamma, which is a curve just as important, if not more so, was quite significantly lowered, resulting in a considerable drop in contrast, except at the beginning of the graph, where the television insidiously lost details. That’s all regarding SDR materials. Taking a closer look at films with a wide dynamic range, we can observe exactly the same phenomenon of yellowing of the white balance as in films with a standard colour palette. The EOTF curve, which replaces our gamma curve, is practically perfect and cannot be faulted.

In filmmaker mode, the colour reproduction on the QNED93A was relatively accurate, although there were some reservations. In SDR content, the white balance was shifted towards warmer tones, which gave the screen a slight yellowish tint overall. The gamma, in turn, led to a slight brightness increase, making the image appear somewhat less natural, especially in scenes requiring precise shading (this is clearly visible in the comparison photo). This is not a problem that immediately stands out to every viewer, but more discerning individuals may feel that the image deviates from the aesthetics intended by the filmmakers. In HDR materials, the situation was somewhat different. The white balance, in this case, was quite good, ensuring that the whites neither leaned towards pink nor unwanted green hues. However, managing brightness turned out to be an issue. An analysis of the EOTF curve revealed that at certain moments, the television could be noticeably too dark where it shouldn't be, losing some detail and lowering the realism of the scenes. This spoiled the reception of HDR effects, which were theoretically supposed to make the biggest impression. For this reason, we decided to carry out calibration.

As we mentioned earlier, LG televisions are equipped with advanced tools for carrying out the calibration process. We therefore used them to model the image in the way that the director intended. And without modesty, we must admit that we achieved this phenomenally. Both SDR and HDR materials present a level that clearly indicates that this is how a film should look. It is worth looking at the colour errors on the "ColorChecker" palette here, where practically none of them exceeds "1", apart from two samples.

After professional calibration, the Filmmaker mode on the QNED93A has improved primarily in areas that matter most on a daily basis. We managed to correct the white balance and eliminate the yellowish tint in SDR content, which is what we watch most often – television, streaming services, or standard quality films. As a result, the colours look natural and pleasant, making the overall experience much more comfortable. We also made adjustments in HDR mode, but here the biggest issue turned out to be the EOTF curve. Although LG offers some flexibility in the settings, the television still manages brightness on its own terms. It is evident that the local dimming algorithms are not fully refined and can ruin the viewing experience by darkening parts of the image at inappropriate times. Nevertheless, it is worth opting for calibration of this model, especially the mode intended for everyday viewing.

Once again, we will take a look at the function responsible for smooth gradation, but we will also address the one that aims to improve the quality of lower-quality materials. The default smoothing of tonal transitions, as we have seen, was not the worst, but it can still be improved. The function has a slider, which allows us to adjust its strength. We recommend using the first one, as it yields very good results and does not blur important details.

Image scaling in LG C4 is quite good; however, it cannot be said to be without flaws. The image is slightly sharper by default, although not in a very noticeable way. Admittedly, there are jagged edges on the trees, but this is not a major issue compared to other manufacturers.

The LG QNED93A proves to be a very solid television for everyday use. Its image processor handles scaling extremely well, which means even older films or terrestrial television benefit from increased sharpness and detail. During the screening of "The Godfather," it is clearly visible how upscaling retrieves additional details from the image – the faces of the characters and the texture of their clothing appear much clearer than in the original material.

The digital image processing also deserves praise. The television is equipped with a function for reducing unwanted colour banding and screen irregularities. It works best in the "Medium" setting – subtly smoothing tonal transitions without excessively interfering with the image. As a result, the natural film grain is preserved, and the screen does not appear artificially smooth. It is possible that in some scenes slight colour banding can still be observed, but in practice, the effect is more beneficial than with a stronger intervention from the algorithm.

The maximum refresh rate that we can set on the LG G4 is 144 Hz. Naturally, this is only possible when connecting the television to a very powerful PC. In other cases, we will be operating at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sport or content with a lot of motion dynamics. For those requiring high fluidity of the image, the manufacturer has implemented a multi-step motion smoother called "TrueMotion". It has been divided into two separate sliders that adjust the sharpness of moving images (De-Blur) and judder (De-Judder). Both sliders can be set within a range from 0 to 10, with each degree affecting the degree of smoothing, allowing everyone to find their golden mean.

The LG OLED C4 panel features an average response time of less than 1 ms (which directly results from our measurements), allowing for an incredibly clear image that is unattainable for LCD televisions, whose response times can be as high as several milliseconds. This is clearly visible in the pictures from the "UFO Test," showing no trailing blur behind the object.

The LG QNED93A is equipped with a 144 Hz panel. This is primarily a nod to gamers, but the fact that higher refresh rates are increasingly making their way into televisions can be viewed positively. In everyday viewing, 120 Hz remains key, and in this respect, the QNED93A performs well. The manufacturer also provides the option to adjust the picture using the TruMotion system – the De-Judder and De-Blur sliders allow you to choose between a cinematic motion character with visible frames and a complete smoothing with theatrical motion.

We can already say that LG C4, like practically every OLED television from the manufacturer, is exceptionally good in terms of compatibility with consoles and PCs. Thanks to the implementation of four full bandwidth HDMI 2.1 ports at 48 Gbps, the manufacturer has included all features that enhance the gaming experience, among which we find simultaneous support for FreeSync and G-Sync technology. With such a tandem, gamers with a graphics card from AMD or Nvidia can confidently opt for C4. However, what should delight the players requiring the highest possible quality the most is the simultaneous implementation of HDR Dolby Vision and HGIG mode. The first is particularly important as it works with extremely low input lag in all settings.

A standard in the Korean manufacturer's televisions is also the implementation of GameBar, allowing for quick adjustments of settings "on the fly" without the need to exit the game. It also enables image adjustments for visually impaired individuals, which is a very nice touch. Another important piece of information is that when VRR technology is enabled, we will not experience a drop in contrast. This is, of course, due to the panel's design and the absence of conventional backlighting. However, it is normal for shades of grey to flicker slightly, although this is a characteristic feature of this function regardless of the manufacturer and television.

In summary: LG C4, just like all of the manufacturer's OLEDs equipped with high refresh rate panels and HDMI 2.1 ports, creates a harmonious whole with consoles. In practice, it is a complete television, and if we expect the highest possible performance in gaming, C4 will be an ideal choice.

LG QNED93A is a television that has undoubtedly been prepared with gamers in mind. Right from the outset, we get a complete set – all four HDMI ports operate in standard 2.1, so regardless of whether we connect a console, PC or amplifier, we can be assured of full compatibility. This is important, as many manufacturers still limit themselves to two ports, and here nothing hinders the entire equipment from having maximum capabilities. There is also an automatic game mode (ALLM), which automatically switches the television to the appropriate settings when the console is turned on, as well as variable refresh rate (VRR). This ensures the picture doesn't stutter or jerk, even when the frame rate drops – whether in dynamic shooters or during races.

The 144 Hz panel gives an additional advantage in computer games. While 120 Hz is sufficient for consoles, in the case of PCs, the QNED93A allows for even more – every movement, every glance to the side is refreshed faster, and this makes a difference, especially in e-sports. The manufacturer also considered HDR in gaming – the television supports the HGiG mode, which are guidelines to ensure that the lighting effects are exactly as the game developers intended. To top it off, we get Game Bar – a special information bar that appears on the screen, showing parameters in real-time. You can monitor the frame rate, active VRR functions, or the level of input lag. This solution is useful not only for settings enthusiasts but for anyone who wants to quickly check what mode the television is operating in and whether everything is working as it should.