Sharp GP6765 vs TCL C75B

In film mode, the television Sharp GP6765 reaches a brightness level of 300 nits, unfortunately, this is quite an average result. Such brightness is closer to the standard SDR image than to what should be offered by a full HDR experience. As a result, the television is unable to convey the full depth and dynamics of the image that one could expect from a good HDR mode. The visual effects that appear vivid and detailed in other models may seem muted here, and high-contrast scenes will not look as impressive. However, it is worth noting that when comparing this result with televisions in this budget, it is a decent score. A positive feature is the fact that the television supports a wide colour gamut of DCI-P3 at 92.5% thanks to the implementation of quantum dots (Quantum Dot/QLED). This is quite a respectable result, especially in this price category. As a result, the colours are vibrant and more saturated, which certainly affects the picture quality, although it does not fully salvage the HDR experience due to limited brightness.

During our test, the TCL C75B "spat out" around 380 nits of brightness. We recorded similar results while watching most of the films we tested. They can be considered average – the television does not perform poorly in this segment, but around 400 nits is definitely too low to fully experience the magic of HDR effects. Of course, these results are better than those of budget models, which can achieve almost half the brightness values. However, for HDR enthusiasts seeking stronger lighting effects and greater realism, the C75B may prove insufficient. On the positive side, it's worth mentioning the DCI-P3 colour gamut coverage of 95%. This is a very good result that easily suffices to enjoy a wide range of colours in content available on popular streaming platforms. Vivid and rich colours are definitely a strong point of this model.

Sharp GP6765 was launched in movie mode, which is the best setting for colour reproduction. Unfortunately, despite this, the quality still falls short of ideal standards. Starting with white balance, in SDR mode, the graph shows significant increases in the case of the red colour. This effect can make the image appear slightly yellowed, leading to distortion of natural skin tones. As a result, viewers may notice that some scenes seem unnatural, and colours lose their authenticity. In HDR mode, the situation changes dramatically – the dominant colour becomes blue. Such a strong shift towards blue also negatively affects the colour balance of the image, which can lead to loss of detail in cool tones. Viewers may feel that the image is somewhat cold and out of balance, which further emphasises the fact that the television does not achieve optimal colour reproduction. Tests carried out using the Colour Checker tool confirm these shifts in several tested samples.

As for contrast, in HD mode, the range shows a significant jump at the beginning of the graph, but then remains close to the reference line at 2.4. This means that in most scenes, the television is able to deliver a satisfactory level of contrast. For the viewer, this translates into better perception of details in shadows and greater depth of the image, which affects their overall experience when watching films and TV programmes. In HDR mode, however, the EOTF curve displays large fluctuations both at the beginning and at the end of the graph. Such fluctuations can lead to inconsistencies in the reproduction of details in bright and dark areas of the image. For the viewer, this means that in scenes with intense light, such as explosions or dynamic actions, crucial details may disappear, and the image can appear blurred. Conversely, in darker parts of the image, the lack of clear differences in shades can cause details to merge into a uniform blob, significantly reducing the quality of viewing. Although movie mode offers the best factory settings in the GP6765, both in terms of colour reproduction and contrast, it still has significant issues.

TCL C75B offers several picture modes, but in our opinion, the best choice is the “Film” mode. Although its settings are quite decent, the television struggles with some colour reproduction issues. In our tests, we noticed that the image had a noticeably pinkish tint compared to what could be considered accurate. This effect was particularly evident in skin tones, which appeared unnaturally flushed. The main culprit for this phenomenon turned out to be the white balance, characterised by an excessive amount of blue and red in both HD and 4K HDR materials.

An additional problem was the way brightness was rendered. The gamma, which is responsible for the visibility of details in darker materials, was definitely boosted, causing details in the darkest parts of the screen to be invisible, disappearing into complete blackness (e.g., the lower part of the screen in the comparison photo - around the actress's ear). Similarly, the situation was reflected in the EOTF curve, which was below the correct value, suggesting that we might encounter a similar problem in 4K HDR content.

Thanks to our experience and the right tools, we decided to take matters into our own hands and see how much we could extract from this model after professional calibration. We describe the details in the next section.

After calibration, in film mode, the white balance on the Sharp GP6765 television for SDR content shows a significant improvement. All lines in the graph approach the reference line. Although they are not perfectly straight, the results achieved are satisfactory, considering the price range of this model. Such an improvement in white balance translates to a more natural and accurate colour reproduction, positively affecting the overall visual experience and immersion in the films being watched. As for the gamut, the initial spike on the graph was not removed; however, after this error, the rest of the lines represent the expected effect much better, making the picture more consistent and enjoyable to perceive.

In the case of HDR content, the white balance performs somewhat worse compared to SDR content, but it is still significantly better than before calibration. The improvement in white balance in HDR contributes to greater colour consistency, making watching films more enjoyable, even though there may be some shortcomings. Speaking of contrast, it is difficult to mention a significant improvement here. Our specialists noted that the lack of control over the dynamic tone mapping settings hindered achieving a significant improvement in EOTF, leading to uneven brightness representation.

Despite some shortcomings related to the lack of settings options for dynamic tone mapping, the Sharp GP6765 television has gained a new identity after proper calibration. The enhanced white balance and better colour reproduction in SDR mode make the image more natural and pleasing to the eye. Although there are still areas that require improvement, especially in HDR content, the television offers a satisfying visual experience, making it an interesting choice within its price range.

After calibrating the TCL C75B, it has clearly improved in terms of colour reproduction. Although the television does not offer many options for adjusting the white balance, we managed to enhance its settings quite significantly. As a result, the image is no longer excessively pink, and the colours now look much more natural and harmonious.

The gamma jump, which was previously an issue, has not completely disappeared, but we have managed to reduce it considerably. This has made details in dark scenes more visible – both in HD and 4K HDR materials.

Unfortunately, the lack of local dimming is still noticeable. The "blooming black" effect remains, but that is a limitation of the display itself. Nevertheless, the colours after calibration look far better, and the image is much more enjoyable to watch.

On the Sharp GP6765 television, the "10-bit colour reproduction" feature performs well in the tested scene with light bulbs. Setting this option to "medium" yields satisfactory results, as there are no issues with grain smoothing or blurring of significant elements of the image. Setting it to "low" also produces positive results, offering a clear picture without negatively impacting the details. Such smoothing options for tonal transitions contribute to an improvement in visual quality, enabling more natural colour transitions.

In the context of image scaling, the Sharp GP6765 television has its strengths, such as the absence of overscan when displaying test material. This allows viewers to enjoy a full picture without losing any detail from the edges. However, in the tested scene with the model, there are some shortcomings. The branches and trousers do not look their best. Their outlines appear slightly jagged, suggesting that effective edge smoothing techniques have not been applied. This causes some details to look slightly distorted, which can affect the overall visual experience.

TCL C75B has a tone transition smoothing function, but unfortunately, we cannot commend it. Regardless of the selected level – low or high – tone transitions in older materials remained visible, as if the function wasn't working at all. It's hard to say anything positive about it, as in practice it seems completely useless.

The image scaling is better. The television performs quite decently, although on thinner elements, like branches in the background, you can notice slight jaggedness. However, this is not something that significantly interferes with daily viewing.

Unfortunately, a bigger problem turned out to be overscan, which is cutting off the edges of the image. In our tests, there were instances where news tickers or other elements near the edge of the screen were cut off. This is definitely something to pay attention to, especially if we use the television for watching news programmes or content with text on the screen.

When it comes to trailing and motion smoothness, the Sharp GP6765 television performs rather mediocrely. It is equipped with a 60 Hz refresh rate panel, which suffices in the context of films. The television has a motion enhancement feature called "Motion Improvement". Thanks to this feature, we can control the fluidity of motion, allowing us to choose whether the image should appear with film-like frames or be smoother - theatrical. This enhancer should satisfy most users who focus on film content. However, when it comes to sports or gaming, Sharp does not perform at its best. In the tested scene with the UFO alien, there is noticeable blurriness, suggesting that the low response time of the panel negatively impacts the sharpness of moving objects. Such effects can be particularly frustrating during dynamic sequences where quick movements are common. For those who prefer watching sports or intense video games, the limitations in motion smoothness may be discouraging, making the Sharp GP6765 not necessarily the ideal choice in this category.

The TCL C75B definitely has something to offer gamers. The television is equipped with a panel that can display images with a refresh rate of 144 Hz in 4K, and even 240 Hz in Full HD. These are really impressive results, especially for a model from the entry-level range.

In addition, there are features for improving fluidity and reducing motion blur in films. The "Motion" option allows precise adjustment of the effect on a 10-point scale, which offers great personalisation possibilities - everyone can set the fluidity as they like.

The functionality of Sharp's GP6765 for gamers leaves much to be desired. Although this model is equipped with HDMI 2.1 ports, which in theory should offer a range of modern conveniences, in practice the situation is far worse. The only feature that truly utilises the capabilities of this standard is Auto Low Latency Mode (ALLM). Unfortunately, the lack of support for key features such as Variable Refresh Rate (VRR) or HDR Gaming Interest Group (HGIG) makes this television a less attractive choice for gamers. VRR is crucial for eliminating issues with tearing and stuttering, which is particularly important in dynamic games where image fluidity is key. Meanwhile, HGIG allows for optimal HDR reproduction, enhancing immersion and visual quality. While it might seem that the implementation of Dolby Vision would bring significant benefits, it is completely useless for gamers due to the very high input lag in this mode.

One could say that the presence of HDMI 2.1 ports in Sharp GP6765 is a marketing trap that may mislead users into thinking that the HDMI standard automatically entails all its conveniences. Expecting full functionality, which should go hand in hand with HDMI 2.1, could lead to disappointment.

The TCL C75B is undoubtedly a television designed with gamers in mind. It offers nearly everything that even the most demanding console users could need. With the implementation of fully capable HDMI 2.1, the television supports features like ALLM (Automatic Low Latency Mode) and VRR (Variable Refresh Rate) – operating within the full potential of the television, up to 240 Hz in Full HD resolution.

Additionally, the television supports advanced HDR technologies, including Dolby Vision and HGiG, allowing for even better detail reproduction in HDR-optimised games. The C75B is also equipped with a very convenient interface for gamers in the form of Game Bar, where all key parameters such as refresh rate, input lag, and image settings can be checked – all within a single click.

In a nutshell: the C75B is a great choice for gamers, offering a wide range of features that allow users to fully enjoy the capabilities of modern consoles and games.