TCL P755 vs Philips OLED770

The TCL P755 delivers an average HDR experience, with a maximum brightness of just under 300 nits. This limitation affects the intensity of bright areas in HDR content, reducing the contrast impact, as bright elements may appear less pronounced. However, the TV compensates with an impressive 93% coverage of the DCI-P3 colour gamut, which brings vibrant, saturated colours that enhance the quality of HDR content. Despite the brightness cap, the extensive colour range enriches hues, providing a more lifelike and visually engaging viewing experience.

The Philips OLED770 does not attempt to compete with the brightest OLEDs on the market, and it would actually be hard to expect that, as it is the lowest model in Philips's series for 2025. In our measurements, it achieved a maximum brightness of about 700 nits, which allows for enjoyment of HDR effects in scenes where light appears point-wise – for example, in the flash of headlights or a starry sky. In such moments, the picture can truly impress. However, it is different when there are more bright elements on the screen. The television, like many cheaper OLEDs, limits brightness in those cases, and the entire picture noticeably dims. This was best seen in a scene from the movie The Meg, where the sun rises behind an oil rig – at that point, the brightness dropped to about 250 nits, nearly three times less. The HDR effect remains visually pleasing, but it is worth being aware that this model performs best in scenes with less intense light. Fortunately, the OLED770 has an ace up its sleeve – the coverage of the DCI-P3 color palette is as high as 99%, so colors in movies and games are saturated and very close to what the creator intended to convey.

In Cinema mode, the colour reproduction on the TCL P755, while set to the best factory configuration, falls short of ideal accuracy. The primary issue is the white balance, where the red component is notably elevated and the green is reduced. This imbalance shifts colours towards red, making them appear unnatural, particularly in scenes featuring white or neutral tones. This issue is highlighted in the Colour Checker test, which shows a discernible red bias affecting the realism of the image and diminishing the perception of colour depth.

Examining contrast performance, the gamma graph analysis reveals notable inconsistencies, especially in darker areas, where values dip below the target level of 2.4. Consequently, shadows and darker sections are displayed brighter than intended, impacting overall contrast. Furthermore, the EOTF (Electro-Optical Transfer Function) curve, essential for accurate brightness representation, veers slightly above the reference curve. The data shows a boost in brightness up to around 50% before a gradual levelling off. This creates excessive mid-tone brightness, which can lead to loss of detail and some distortion in brighter scenes, ultimately affecting the clarity and immersion of the viewing experience.

The first measurements already show that the factory settings of the Philips OLED770 have a lot to improve even in Filmmaker mode. The white balance chart clearly shows a lack of blue, which gives the image a slightly yellowish tint. In practice, the white is not snow-white, but leans towards warmer hues – which some may even like, but from the accuracy perspective, this is a deviation from the norm. The gamma, on the other hand, tends to be on the darker side – the average value is about 2.6 instead of the reference 2.4. In the mid-tones, the image appears muted and more saturated, which may look too "filmic," but takes away some naturalness. However, the biggest issues can be seen in color reproduction. The average error is relatively high, and some colors – especially shades of gray – clearly deviate from what should be seen. In everyday viewing, this means that sometimes colors may look less natural than we would wish.

Post-calibration, the TCL P755 delivers a markedly improved colour performance for SDR content. The colour curves now align closely with ideal values, with a more consistent gamma stability across the range. While a slight drop at the beginning of the gamma curve persists, the accuracy in colour reproduction is significantly enhanced. The Colour Checker test reveals most colour samples are now under an error threshold of 2, showcasing much-improved colour fidelity with only minimal deviations, resulting in colours that feel notably more authentic to life.

HDR content benefits from these calibration adjustments as well. White balance corrections lend a more natural tone, with colours appearing more balanced overall. The EOTF curve, while nearer to the ideal reference line, still features a mild brightness elevation at the start, which can cause minor distortions in exceptionally bright scenes. However, overall tonal quality and detail resolution have both improved. Tone mapping also performs more effectively, enhancing detail in bright regions while maintaining better image accuracy.

In summary, while calibration does not bring flawless performance, it makes a substantial difference in the P755’s visual quality. Following these adjustments, the television provides a more accurate, realistic viewing experience in both SDR and HDR content, smoothing out many of the previous colour inconsistencies for a more visually engaging result.

Philips OLED770 has shown signs from the beginning that it houses significant potential, but it was difficult to fully see this in the factory settings. The image was sometimes too warm, and some colors seemed to have lost their naturalness along the way. However, calibration revealed that it is a television very receptive to adjustments – it reacted to every correction and almost immediately unveiled another layer of its capabilities. The white balance was successfully set both in SDR and HDR, eliminating the yellowish glow and presenting a neutral, clear white. Gamma stabilized closer to perfection, allowing midtones to regain their naturalness, and shadows no longer appeared artificially darkened, possibly even with a slight brightening effect. The effect was obvious... Movies are watched with greater ease; the image has cinematic depth, but without the feeling that something is exaggeratedly darkened. However, the most interesting part was the work on colors. Out of the box, the errors were not dramatic but slightly noticeable – skin tones were sometimes too warm, and gray didn’t always have the shade we expected. After calibration, the error values dropped to around 2, and in many cases even below 1. This is a level significantly lower than the threshold of perception for the human eye. In other words, after correction, the colors finally “clicked” into place. Looking at the screen, we had the impression that the television had begun to speak with a full voice. Like an instrument that has finally been well-tuned.

The "Gradual Smoothing" function on the TCL P755 performs effectively, reducing visible boundaries between shades of the same colour and creating smoother tonal transitions. Unfortunately, this feature is unavailable in HDR mode, which can impact the quality of tonal gradations in high dynamic range content.

In terms of image scaling, the television shows some limitations. There are visible edge cut-offs, especially noticeable around figures and tree branches, which result in some detail blurring and a reduction in overall image sharpness. This is particularly noticeable when viewing lower-resolution content. Additionally, SD-quality images display a slight crop at the top and bottom, which may further impact viewing for standard-definition content.

The problem of the previously mentioned color connections can largely be mitigated by the "distortion reduction" feature, which is an algorithm for smoothing tonal transitions in Philips TVs. It works best at a low setting—effectively eliminating unwanted color bands while not introducing strange artifacts or losing image detail. It's one of those features that is truly worth keeping switched on.

The issue with upscaling is somewhat less favorable. The image from a lower resolution can be too soft, while at the same time, distinctive "jaggies" appear in certain areas. The impression is that the algorithm is trying to reconcile two contradictory directions—smoothing and sharpening—and ultimately hasn't found the golden mean. As a consolation, it's worth noting that the television has no issues with overscan, meaning it doesn't cut off the edges of the image, which sometimes happens with other competing models.

The TCL P755 delivers satisfactory, though not flawless, motion smoothness. It includes a "Flicker Reduction" feature for films, allowing users to fine-tune motion smoothness on a scale from 1 to 10. This setting offers flexibility in tailoring the image to cinematic or more theatrical preferences, adjusting for a slower or faster appearance according to personal viewing taste.

The issue of the panel in the Philips OLED770 is not entirely straightforward. The manufacturer claims a 120 Hz panel, but our measurements showed that the screen can accept a 4K signal even at 144 Hz. This sounds like great news – because who wouldn't want an extra mode for PC gaming at this price? However, the reality turned out to be more complex. With 120 Hz materials, the television behaves like most OLEDs – the picture is absolutely clear, with no trace of ghosting or blurring, making it ideal for both fast-paced games and sports broadcasts. The problem arises only at 144 Hz. Unlike models with official support for that frequency, here we observe the phenomenon of so-called frame skipping. This means that the television is unable to display all frames – some of them are skipped, causing the motion to lose fluidity, and double outlines appear on the screen. The effect resembles the operation of the BFI function, which Philips does not offer in this model anyway.

The TCL P755 comes equipped with gamer-oriented features like ALLM (Auto Low Latency Mode), VRR (Variable Refresh Rate), Dolby Vision for gaming, and a Game Bar. ALLM automatically activates low latency mode to enhance response times and reduce input lag, while VRR syncs the screen refresh rate with the console's frame output, minimising screen tearing for a smoother gaming experience. Dolby Vision for gamers brings improved colour and contrast for compatible games, and the Game Bar allows easy access to essential settings like response time.

However, the 60 Hz panel limits the display to this refresh rate across resolutions, which may impact the fluidity in high-motion games. The absence of G-Sync also affects PC gamers, as gameplay on computers lacks this technology's extra smoothing. Notably, HGiG mode, meant to optimise HDR game visuals, is not fully functional on this model, which slightly detracts from the HDR gaming experience.

If someone is looking for a gaming TV, the Philips OLED770 is a candidate that's hard to ignore. The mere fact that we have an OLED here provides a great starting point – perfect blacks and infinite contrast make evening sessions in atmospheric games look like they’ve been pulled straight from the cinema. On top of that, there’s the Ambilight system, which features LEDs on the back of the TV that extend the image onto the wall behind the screen. The effect is such that even regular gameplay in FIFA can look like a small spectacle, and in horror games, the atmosphere becomes really intense. On the technical side, it’s pretty good as well. The Philips OLED770 supports Variable Refresh Rate (VRR) up to 120 Hz, has an automatic low latency mode for gamers (ALLM), and if someone is using an Xbox Series X, they can also count on Dolby Vision support in games. You just need to know that in this mode, input lag is slightly higher than standard, although still at an acceptable level. As a bonus, we get the “Game Bar” panel, which is a special tool strip for gamers. It's not the most conveniently designed solution, but it allows you to check key parameters without leaving the game. In total, this presents a picture of a TV that on one hand has all the most important gaming features, and on the other can add something unique – Ambilight. And it’s this mix of technology and visual effect that makes the OLED770 one of the better screens for gaming in a home environment.