Sharp GP6765 vs TCL C655 / C69B (55"-85")

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.

Generally speaking, the quality of the HDR effect on the TCL C655 / C69B looks quite promising. The average value in the test charts is around 450 nits, which already allows one to feel the light effects and better image dynamics. However, as previously mentioned, this effect may be partially subdued by slight differences in bright and dark colours, resulting from the lack of local dimming technology. However, the coverage of the DCI-P3 colour palette at 94% deserves high praise, and this is made possible by the use of a quantum dot (QLED) matrix. As a result, colours are vivid and accurately represented when watching HDR content.

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.

The television TCL C655 / C69B offers a film mode that has been tested for colour reproduction quality. Although this mode is called film mode, it unfortunately has several errors that a director would surely not want to see when recording their work. Starting with image analysis, it is worth examining the white balance – both in HD and 4K HDR content, the white balance has significant errors. In both cases, the red colour dominates, causing the colours to be too warm, and the overall result takes on a pink or yellow tint. This can be seen in the image below from the film "Star Wars". The Colour Checker test confirms these errors – the colour samples veer into incorrect shades, affecting the overall colour fidelity. A less significant issue is the brightness characteristic. However, this is also not without its flaws. The gamma graph shows a strong peak at the beginning, causing the image to be excessively brightened, and the EOTF curve responsible for brightness in 4K HDR material also has substantial fluctuations – it is noticeable how the television tries to maintain the appropriate brightness, but it does not always succeed effectively.

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 television's film mode TCL C655 / C69B , the white balance has been adjusted, and the colours are presented as they should be – confirmed only by slight deviations in the Colour Checker test. The gamma is really quite accurate, which means the television should not have issues with brightness in low-resolution materials. Unfortunately, a similar EOTF characteristic is still visible, which is a natural phenomenon in televisions that do not have local dimming – they simply struggle to "shine" more in a given area of the screen. Despite this inherent limitation that cannot be bypassed, we recommend adjustment in the settings, as the overall colour presentation looks really very good.

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.

The television TCL C655 / C69B handles tonal transitions fairly well in low-quality materials. The "Gradual Smoothing" feature at a low setting effectively smooths out tonal transitions; however, it simultaneously blurs significant details, such as the texture of objects. On the plus side, it does not negatively impact the film grain, allowing the natural appearance of the image to be preserved. As for digital processing, the television adds artificial sharpness, which may appeal to some users who prefer a sharpened image. However, for those who prefer a softer look, this could be a disadvantage. A notable downside is that the image has been quite significantly cropped due to what is known as overscan, which reduces the field of view and trims the edges of the image.

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 television C655 / C69B is equipped with a 4K@60 Hz panel, which means it works best for watching films and less dynamic content. It also features a "Flicker Reduction" function that allows for the adjustment of image smoothness – the user can choose whether they prefer smoother motion or a more cinematic, frame-by-frame effect. The television can also adapt to lower resolutions, such as Full HD and 2K at 120 Hz, which will surely please gamers by offering a smoother image at the cost of resolution. It is worth noting that this feature is available in sizes from 55"+. Additionally, the largest variant, 98", is equipped with a 144Hz panel with full motion smoothing.

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 C655 / C69B television offers nearly the perfect set of features for gamers, supporting all the most important technologies. It has an ALLM feature that automatically switches the TV to low latency mode, significantly improving responsiveness and minimising signal lag, which is especially important during dynamic gameplay. The VRR feature allows the screen refresh rate to synchronise with the frame rate generated by the console, eliminating screen tearing and providing smoother gameplay.

The television also supports Dolby Vision in game mode, which ensures better colour and contrast rendering in games that support this format, and the Game Bar provides quick access to settings related to gameplay, such as response time, latency level, and other parameters. Unfortunately, the C655 / C69B does not support 4K resolution at 120 Hz (the exception here is the 98" variant), which may be disappointing for more demanding gamers who expect the highest fluidity of image in high-resolution games. However, if we can forgo 4K, the television offers support for Full HD and 2K at 120 Hz, providing a smoother image and is a great alternative for those who prefer a higher refresh rate at the expense of resolution.