LG 55 B4 vs SONY BRAVIA 3

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.

Bravia 3 does not hide the fact that it belongs to the group of televisions that are rather modest in terms of brightness. Our measurements showed around 370 nits, which is a value teetering on the edge of where one can still speak of any HDR effect. For some, this is an acceptable level, while for others it is rather typical for SDR content, where spectacular highlights or vivid contrasts are not expected. The impression is that this is not a television for those focused on the highest image quality in demanding cinematic content. However, this does not mean that we cannot find any advantages here. Compared to its predecessor, the X75WL, Bravia 3 has gained an additional PFS filter, which works similarly to solutions known from QLED technology. Thanks to this, the DCI-P3 colour palette has been significantly widened and reaches over 91 percent, which in practice results in more saturated colours and a more pleasing image texture. As a result, even everyday content looks somewhat livelier, and films and series can surprise with vibrant visuals, despite limitations in brightness itself.

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.

Sony Bravia 3 was primarily tested in film mode, which immediately proved to be the best choice among the factory settings. It is not a perfect picture, but compared to the eco mode that the television offers right out of the box, the difference is clear and positive. In film mode, one can notice a certain problem: the image appears too warm, which results from a lack of blue colour in the white balance. Despite this, in SDR content, the final effect can still be considered quite decent and satisfactory for everyday viewing. Much more serious errors occur in HDR materials. The Color Checker analysis showed considerable deviations, and poor brightness management, combined with limited colour gamut coverage, further exposes the shortcomings of the image in this mode. All of this makes HDR on the Bravia 3 appear unconvincing and can spoil the impression left by the quite decent SDR content setting. Fortunately, this is not an insurmountable situation. Various errors can be somewhat mitigated, and some can even be fully corrected through professional calibration. Therefore, we decided to check how the television would perform after such adjustments.

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.

The calibration allowed us to extract significantly more from the Bravia 3 than we could have expected at the beginning. Firstly, it managed to compensate for the deficiency of blue, which had previously caused a noticeable warming of the image. After a slight adjustment to the white balance, most of the errors in the Color Checker measurements for SDR content virtually disappeared. The white tones became more natural, and the brightness management in gamma stabilised to an almost ideal level, not exceeding the threshold of human perception. Thus, it can be confidently stated that in SDR content, after a few adjustments to the settings, the Bravia 3 performs remarkably well. Significantly worse, although still definitely better than before calibration, are HDR contents. The white balance was brought into order, however, the limitations of the IPS panel are insurmountable. The lack of local dimming means that even the smallest elements can be overexposed, which immediately stands out. Colour-wise, the effect is also improved, though far from perfect – many errors still exceed the threshold of four or even five delta E units, meaning they remain visible to the human eye. It was already clear earlier that the Bravia 3 is not a television designed to impress with HDR quality. Nevertheless, it is gratifying that in SDR content, after calibration, the image can look truly excellent, and in this category, the television pleasantly surprised us.

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.

Bravia 3 brings something more to the Sony TV family than just a shared name. It stands out primarily for its ability to enhance the quality of weaker materials thanks to the processor used. Of course, we won’t find the advanced XR chip known from more expensive models here, but even so, it must be admitted that the image in lower resolutions looked surprisingly good. The scaling worked effectively, and most parts of the screen were free from the typical excessive edge tearing found in budget constructions.

Attention should also be paid to the function that improves the smoothness of tonal transitions. In the high setting, it works really well, effectively masking gradation imperfections without significant detail loss. It does happen, however, that the algorithm overly smooths elements that should remain sharp – for example, faces – but overall, the effect is beneficial. The best results were achieved precisely at the highest setting, and this option could be recommended to those watching lower quality content.

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 fluidity of motion has never been a strong point of televisions equipped with 60 Hz panels, and the Bravia 3 is no exception. Nevertheless, Sony has added something that may appeal to those more sensitive to the way images are displayed. We are talking about the proprietary motion smoother, Motion Flow, which offers users a considerable range of adjustment options. Thanks to it, one can make the image smoother, even theatrical, or stick to a more cinematic style with the characteristic judder that many simply associate with the filmic atmosphere. These functions work with content at lower frame rates, such as films and series recorded at 24 or 30 frames per second, which are the materials we encounter on a daily basis. It is here that the motion smoother proves to be one of the most important features in everyday use of the television, and this is where the Bravia 3 performs quite well.

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.

Bravia 3 is not equipment for e-sports enthusiasts or fans of night marathons with a controller in hand. The lack of 120 Hz refresh rate and HDMI 2.1 ports closes the topic before it even has a chance to develop. This is a television for casual gamers who will play FIFA or racing games after work, not for someone who measures every frame in a spreadsheet. Nevertheless, Sony has added a few nice extras to ensure it’s not too sparse. ALLM works as it should, automatically switching the television to game mode (low latency). There’s even a simple Game Bar, which is clear. However, the biggest novelty here is the PlayStation Portal app. Thanks to it, you can launch PS5 games wirelessly and view them immediately on the television screen. It sounds great, but just a few minutes is enough to feel significant lag. In our opinion, it’s more of a showcase of capabilities than something that can be used every day. If someone really wants to play, it’s better to connect the console via HDMI cable and forget about wireless issues.