After calibration, colour reproduction in SDR content is quite good. The white balance has been effectively improved, resulting in natural, balanced hues across different scenes. The gamma has also been adjusted, providing a more precise representation of details in the shadows and bright areas of the image. As a result, the LG UR781 TV performs well in everyday use, offering solid colour quality and clear, well-balanced images in SDR mode.
However, the situation is less favourable for HDR content. The LG UR781 TV does not support a wide colour gamut, which limits the depth and richness of colours that HDR can provide. The EOTF curve deviates from the ideal, leading to excessive highlighting of details in the bright areas of the image. Unfortunately, this approach results in significant colour reproduction errors, as confirmed by tests on the Colour Checker. Additionally, the low brightness level of the panel further negatively impacts HDR image quality, causing the effects of dynamic range to not be fully realised and colours to appear washed out.
Despite some shortcomings in HDR mode, the TV has significantly improved after calibration, especially in SDR content. The enhancement of white balance and gamma has notably increased image quality, providing a more natural and cohesive colour reproduction. Compared to its pre-calibration state, the difference is clear, and the LG UR781 TV now offers better performance in everyday use, particularly in standard dynamic range.
Sony BRAVIA XR70 offers a wide range of tools that allow you to customise the image to your own preferences, enabling significant adjustments to the settings. White balance has been freed from the red colour dominance issue – snow no longer takes on pink hues, which was previously noticeable. Although there are slight deviations in the final part of the white balance chart regarding a drop in blue colour, they are acceptable and difficult to notice in everyday use. The Colour Checker test confirms that colour reproduction errors are no longer as pronounced and rarely exceed a value of 2, which is a very good result. As for brightness, gamma, although it didn't require major improvement, has been slightly adjusted. However, the most significant change has been noted in the EOTF curve – the television no longer has issues with excessively brightening the entire image in 4K materials. However, upon closer examination and incorporating the EOTF characteristics in film materials, some limitations of the television become apparent due to the previously discussed dimming algorithm. Some small elements may be slightly more illuminated, but these errors are minor enough that most users won't notice them. Overall, the calibration results are very, very positive.