LG 55 B4 vs SONY BRAVIA 3

The HDR brightness performance of the LG B4 is impressive, even though it doesn't surpass 1000 nits. Its luminance stability is consistently strong across various scenarios, delivering a reliable viewing experience. The only instance where the TV shows slight weakness is in scenes with large areas of bright white, which has long been a challenge for OLED technology. However, perfect contrast, deep blacks, and excellent brightness ensure a fully immersive HDR experience. Furthermore, the TV’s remarkable 99% coverage of the DCI-P3 colour gamut enhances its colour vibrancy, making images appear rich and visually striking. This level of colour accuracy and brightness balance firmly places the LG B4 among the top choices for HDR content.

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 balancing on the borderline where one can still speak of any HDR effect. For some, this is an acceptable level; for others, it is rather typical for SDR materials, 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 film content. However, this does not mean that we won't find any advantages here. Compared to its predecessor, the X75WL, Bravia 3 has gained an additional PFS filter, functioning similarly to solutions known from QLED technology. Thanks to this, the DCI-P3 color gamut has been significantly expanded and reaches over 91 percent, which in practice provides more saturated colors and a more pleasant image texture. As a result, even everyday content looks a bit livelier, and movies and series can surprise with their colorful presentations, despite the limitations in brightness itself.

The best factory preset offered by LG B4 is the "Filmmaker" mode, which we used throughout our testing. Straight out of the box, the TV delivered fairly accurate colour reproduction. However, the most significant issue in both SDR and HDR content was the white balance. In SDR, there was a noticeable red dominance, giving the image a distinct yellow tint, particularly evident in skin tones and whites. In HDR, this red hue persisted, but the lack of blue also introduced a greenish tint in certain scenes. Additionally, we observed some inconsistencies in grayscale and colour accuracy. Despite these shortcomings, the overall picture quality was still solid for most viewing scenarios.

We primarily tested the Sony Bravia 3 in movie mode, which immediately proved to be the best choice among the factory settings. The picture is not perfect, but compared to the eco mode that the TV suggests right out of the box, the difference is significant and for the better. In movie mode, one can notice a certain problem—the image seems too warm, which results from a lack of blue in the white balance. Despite this, in SDR content, the final effect can still be considered quite decent and satisfying for everyday viewing. Much more serious errors occur in HDR materials. The Color Checker analysis showed significant deviations, and poor brightness management combined with limited color gamut coverage further exposes the shortcomings of the image in this mode. All of this makes HDR on the Bravia 3 look unconvincing and can spoil the impression left by the quite decent SDR content settings. Fortunately, this is not a situation without a solution. Various errors can be somewhat mitigated, and some can even be completely corrected through professional calibration. Therefore, we decided to check how the TV would perform after such adjustments.

LG B4 has long been known for offering advanced calibration tools, and it remains one of the few manufacturers that allows such in-depth image adjustments. Thanks to these tools, we calibrated the device to an exceptional standard. The result was incredibly low deltaE errors, considered at a reference level. Both SDR and HDR content now display exactly as the filmmaker intended. This level of precision is one of the reasons LG TVs are frequently used as preview monitors in graphic design and post-production studios.

The calibration allowed us to extract significantly more from ChooseTV 3 than we could have expected at the beginning. First and foremost, we managed to address the shortage of blue color, which previously caused a noticeable warming of the image. After a slight adjustment in white balance, most of the errors in Color Checker measurements for SDR content practically disappeared. The shades of white gained a natural quality, and brightness management in gamma stabilized to a level that is nearly perfect, not exceeding the threshold of human eye perception. Therefore, it can be confidently said that in SDR content, after a few tweaks in settings, ChooseTV 3 performs really excellently. HDR content, however, fares much worse, although it is still definitely better than before calibration. The white balance has been corrected, but 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. Color-wise, the effect has also improved, although it is far from ideal—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 before that ChooseTV 3 is not a television designed to amaze with HDR quality. Nonetheless, it is gratifying that in SDR content, after calibration, the image can look really great, and in this category, the television pleasantly surprised us.

In this section, we will revisit the smooth transition function while also examining how the TV handles lower-quality content. As we’ve found, the setting responsible for smooth gradation is generally effective, though it does have its drawbacks. While the function works well in SDR content, it becomes less useful in HDR content. Even at the lowest setting, it can blur important details, so we advise against using it in such cases.

The image scaling on the LG B4 is assessed moderately positively. While there is no noticeable edge doubling, the image tends to be somewhat "soft." This can be adjusted by tweaking the sharpness slider to improve the clarity.

Bravia 3 brings something more to the Sony television family than just a common name. It stands out primarily for its ability to improve the quality of weaker materials thanks to the applied processor. Of course, we won't find the advanced XR chip known from more expensive models here, but it must be acknowledged that the image at a lower resolution looked surprisingly good. Scaling worked effectively, and most parts of the screen were free from the typical excessive jagged edges found in budget constructions.

The feature that enhances the fluidity of tonal transitions is also worth noting. In the high setting, it works really well, effectively masking the imperfections of gradation without significant loss of detail. It does happen that the algorithm overly smooths elements that should remain sharp – for example, faces – however, in overall terms, 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 on the LG B4 is 120 Hz, the bare minimum for those requiring high image fluidity. The manufacturer has equipped the TV with a multi-stage motion smoother called "TruMotion." This feature is split into two sliders: one controls the sharpness of moving images (De-Blur) and the other adjusts judder (De-Judder). Both sliders can be set between 0 and 10, with each level affecting the smoothness, so users can easily find their preferred setting.

The LG OLED B4 panel boasts an impressive average response time of 0.1 ms (based on our measurements), delivering an exceptionally clear image that surpasses the capabilities of LCD TVs, which often have response times of several milliseconds. This is particularly noticeable in the "UFO Test" images, where no trailing blur is visible behind moving objects.

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

The LG B4 has four full HDMI 2.1 ports, each providing 48Gbps bandwidth. This ensures smooth activation of all relevant features without issues, making the television highly suitable for gaming. With its low input lag and extensive functionality, including well-implemented HGIG mode and Dolby Vision gaming with low latency, the B4 is a strong contender for gamers who demand high quality.

A standout feature is GameBar, which allows for on-the-fly adjustments without interrupting gameplay, as well as image adaptations for those with visual impairments. Another key point is that when VRR technology is enabled, the television maintains its contrast, thanks to the OLED panel's structure, though slight flickering in grey shades is to be expected.

In conclusion, the LG B4 is an ideal choice for gamers, seamlessly combining high performance with excellent gaming features. Its 120Hz panel and HDMI 2.1 ports make it a standout option for those seeking top-tier gaming experiences.

Bravia 3 is not a device for e-sports enthusiasts or fans of late-night marathons with a controller in hand. The lack of 120 Hz refresh rate and HDMI 2.1 ports wraps up the topic before it can even develop. This is a TV for casual gamers who, after work, want to fire up FIFA or racing games, not for someone who measures every frame in a spreadsheet. Nevertheless, Sony has added a few nice extras so it’s not too barren. ALLM works as it should, automatically switching the TV to game mode (low latency). We even find a simple Game Bar here that is clear. However, the biggest curiosity is the PlayStation Portal app. With it, you can launch games from PS5 wirelessly and immediately see them on the TV screen. It sounds great, but it only takes a few minutes to feel significant delays. In our opinion, it’s more of a showcase of capabilities than something usable on a daily basis. If someone really wants to play, it’s better to connect the console with an HDMI cable right away and forget about wireless problems.