LG 55 B4 vs Philips MLED920 / MLED910

The brightness results in HDR materials for LG B4 are very good. It is true that none of them exceed 1000 nits, although the stability of luminance is excellent and looks practically the same in every scenario. The only moment where the tested television performs worse is the last of the scenes, although this should not be surprising. Large frames filled with a lot of white have always been, and probably will continue to be, somewhat of a weakness for OLED televisions. However, the combination of perfect contrast, black levels, and brightness of LG B4 allows for a full experience of the HDR effect. Additionally, the incredibly high coverage of the DCI-P3 colour gamut deserves recognition, reaching 99%. This makes the colours look incredibly vivid and striking.

Philips MLED920 in our measurements in static tests even reached around 900 nits, which is really a solid result for a mid-range model. In practice, this translates to a lot of satisfaction during viewing sessions – in scenes rich in bright light, such as the first, third or fifth test slide, the screen managed to generate about 700 nits, which is sufficient to feel the true "HDR effect." However, it cannot be denied that the limited number of dimming zones and the compromises typical of mini-LEDs in more demanding scenes reveal their nature. In sequences with small light sources – like the moon or a scene from the film Sicario 2 – the television clearly prioritises maintaining deeper blacks at the expense of the brightness of these small elements. For most viewers, this is still a reasonable compromise, as the dark background looks significantly better, though it is important to be aware that the details themselves may not impress with their intensity. There is also a certain sense of dissatisfaction regarding the colours. Although the applied PFS filter (the equivalent of quantum dots known from QLEDs) does its job and the colours appear quite vivid, the coverage of the DCI-P3 palette reaches “only” 90%. In everyday viewing, this will be sufficient, but in extremely colourful productions – like the latest Disney animations – one can notice that some tones are not as vibrant as they could be in other setups.

The best factory mode prepared by the manufacturer is "Filmmaker," which is exactly what we used throughout the entire testing procedure. We must admit that the unit we received out of the box had quite good colour reproduction. The biggest problem in both SDR and HDR content turned out to be white balance. In the former, a strong red hue was evident, causing the displayed image to have a pronounced yellow tint, particularly noticeable on skin tones and whites. In higher quality materials, this colour was also accentuated, but due to a lack of blue, there were also signs of green visible. Apart from these issues, we also encountered problems with grayscale and the colours themselves.

Like every Philips television we tested, we primarily assessed the MLED920 in Filmmaker mode – this is meant to be the "most honest" mode, designed for films and to faithfully convey the intentions of the creators. Indeed, in terms of colour reproduction, it performs the best among all the modes available on the television, but it is not without flaws. The first thing that catches the eye is the white balance. The image has a slight tendency towards purple-pink tones, which gives it a somewhat unnatural character. An even bigger problem, however, turned out to be what we mentioned earlier – image blooming. Just looking at the gamma or EOTF charts reveals that the line significantly deviates from the norm, dropping below a value of 1.8. In practice, this means "bleeding" of the brightest whites, where the image becomes almost milky. Fortunately, most of these issues can be corrected – the MLED920 responds well to calibration, and with a few adjustments, one can significantly improve the viewing experience.

LG B4 has been providing very advanced calibration tools in its televisions for years. We can even say that as the only manufacturer on the market, it allows for such deep intervention in image adjustment. It is thanks to these tools that we were able to calibrate the device so well. Evidence of this is the extremely low deltaE errors, which can be said to be at a reference level. Both SDR and HDR materials now look exactly as intended by the film director. It is no coincidence that televisions of this brand are most often used as preview screens for various graphic or post-production studios.

After calibration, we managed to largely tame the white balance – to the extent that the average viewer will not be able to detect distortions in colours. The characteristic pink-purple haze that previously disrupted the naturalness of the image has also disappeared. The colour palette has been organised, and the colours appear more coherent and neutral. The gamma in SDR content post-calibration looks really good – there is no longer any mention of the previous 'bleeding' effect in bright scenes. The image has become more contrasty and devoid of that milkiness which had previously greatly harmed the viewing experience. In the case of HDR content, the improvement is also noticeable, although here it is still evident that the television is going 'its own way'. The EOTF curve cannot be fully shaped, as Philips simply does not offer the tools to allow precise control over this parameter in its settings. In many films, the television still exposes the image 'in its own way'. Despite these limitations, the calibration has delivered quite a bit of good – most of the colour distortions have been minimised, and the overall balance of the image has significantly improved. However, it must be noted that certain barriers stem from the very design of the hardware and simply cannot be overcome.

In this paragraph, we will take another look at the function for smoothing tonal transitions, but we will also check how the television handles lower quality material. As we have managed to verify, the setting responsible for smooth gradation works quite efficiently, although it has its weaker moments. Just as the function works correctly in SDR content, it becomes rather useless in HDR content. Even at the lowest of the options, it blurs essential details, which is why we advise against using it.

The image scaling on LG B4 is rated rather moderately positively. Although there is no edge doubling, the image itself is naturally "soft." We can change this by adjusting the sharpness slider.

The manufacturer has equipped this model with several features that improve signal quality, and although we usually approach such "enhancements" with caution, here they prove to be really helpful. The key option is called "distortion reduction" – it works best at a medium level, as on one hand it effectively smooths out unwanted stair-stepping and colour banding, while on the other it does not excessively cut out details, allowing the image to still look natural.

Things are a bit worse with upscaling. Lower quality materials – such as the test video with the model – appeared soft and lacking in sharpness. Indeed, it can be partially corrected with the sharpness slider in the menu, but the effect remains far from what competitors in a similar price range offer. Philips therefore still needs to work on this element, as compared to the successful improvement of tonal transitions, the upscaling simply falls short.

The maximum refresh rate that we can set on the LG B4 is 120 Hz. This is the absolute minimum for those requiring high image fluidity. The manufacturer has implemented a multi-step motion smoother called "TruMotion". It has been divided into two separate sliders adjusting the sharpness of moving images (De-Blur) and jitter (De-Judder). Both sliders can be set in the range from 0 to 10, with each degree affecting the level of fluidity, so everyone can find their golden mean.

The LG OLED B4 panel features an average response time of 0.1 ms (which directly results from our measurements), allowing for an incredibly clear image, unattainable for LCD televisions, whose response times can be as high as several milliseconds. This is clearly evident in the pictures from the "UFO Test", showing no trail following the object.

The Philips MLED920 features a 144 Hz panel, which immediately suggests that we shouldn't complain about motion smoothness. And indeed – the motion blur is relatively low for a VA panel, and although slight issues can sometimes be noticed on darker backgrounds, they are not something that would stand out to most people during regular viewing.

Another significant advantage is the presence of a motion smoother called “Motion Style.” It allows you to adjust the sensation of smoothness to your own preferences – if someone prefers a more “theatrical,” almost television-like image, they can increase the sliders, whereas if they prefer to maintain the natural “jumps” of cinematic frames, it’s enough to set lower values. This way, everyone can find their golden mean.

The LG B4 television is equipped with four fully-fledged HDMI 2.1 ports with a full bandwidth of 48Gbps. All features that are identical to this standard were activated without any issues, and throughout the entire testing process, they did not cause any problems. The combination of such extensive functionality and low input lag suggests that the tested television is truly made for gaming. This is not surprising, considering that the manufacturer has always placed great emphasis on this. Therefore, we can enjoy both the properly implemented HGIG mode and gaming in Dolby Vision with low latency. This pairing will certainly attract the attention of all passionate gamers for whom quality is paramount.

An additional standard in televisions from this Korean manufacturer is the implementation of GameBar, allowing for quick adjustment of settings "on the fly," without the need to exit the game. It also enables image adjustments for individuals with visual impairments, 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 thanks to the construction of the panel and the lack of conventional backlighting. However, it is normal for shades of grey to flicker slightly; nevertheless, this is a characteristic feature of this function regardless of the manufacturer or television.

In summary: the LG B4, like all of the manufacturer’s OLEDs equipped with 120Hz panels and HDMI 2.1 ports, creates a harmonious whole with the console. In practice, this is a comprehensive television, and if we expect the highest possible efficiency in gaming, B4 will be the ideal choice.

For gamers, the Philips MLED920 is truly a complete tool. The manufacturer has taken care of everything that is considered standard in televisions designed for consoles and PCs today. It features ALLM, so the console automatically switches the screen to game mode, alongside VRR and a refresh rate of 144 Hz, which guarantees smooth gameplay even in fast-paced titles. All key HDR formats are supported – including HGiG and Dolby Vision Gaming for Xbox – which means that regardless of what you are playing and on which console, the television will be able to extract the maximum potential from the image. The Game Bar also proves useful in daily gaming – a relatively simple implementation by Philips, but a functional panel where you can quickly check image parameters, enable VRR or adjust settings without leaving the game. It may not be as comprehensive as the competition, but it performs its task flawlessly. And finally, something that sets Philips apart from the competition – Ambilight. The three-sided LED backlighting can create a huge impression in games, especially in the evening. It's also a way to slightly 'extend' the screen and enhance the feeling of immersion. And as colourful LEDs have recently become almost a mandatory element of a gamer’s room, the MLED920 fits into this trend perfectly.