The Samsung Q70D and its related models, like the Q77D and Q74D, feature a VA panel, which generally provides excellent contrast. Compared to IPS/ADS screens without advanced local dimming, the contrast on these models is several times better. However, the contrast results can vary significantly due to the non-uniformity of the panel. This means that sometimes the contrast is great, but at other times it can be noticeably worse, though it tends to remain fairly consistent overall, except for light bleeding.
To illustrate this, we look at two film scenes from "Oblivion" and "Revenant." In the first scene, the lights are well-separated, which is a positive as it suggests that detailed visibility in bright areas should be good in future tests. What stands out in this frame is the sharpness of the smoke under the light and the deep navy blacks in the background. In contrast, the second scene from "Revenant" reveals uneven backlighting, which is quite noticeable and impacts the overall image quality. Despite this, the details in the movie remained clearly visible.
Hisense U7NQ is a television that uses a VA panel, crucial for achieving good contrast and appropriate black depth. This technology translates into vivid image quality when watching content in a dark room, where blacks acquire proper saturation and resemble deep tar rather than washed-out ash. Moreover, the TV features Mini LED backlighting, which in the tested 65-inch variant offers an impressive number of 713 local dimming zones. Naturally, smaller sizes will have fewer zones, while larger ones will have more, positively affecting overall contrast.
Under very favourable conditions, the TV achieves a contrast ratio of around 40,000:1. The local dimming technology performs excellently at managing bright and dark parts of the image, making the TV superbly render details in complex scenes. Despite the large number of zones, there may be issues with contrast in particularly demanding scenes, where small bright elements appear against a dark background. Sometimes the TV may dim these elements too much, causing a loss of brightness, and other times it excessively brightens them, leading to a halo effect—glows of light surrounding objects. This effect can be noticeable, for example, in a scene from the movie Sicario 2, where bright glows around the subtitles can be bothersome.
Nevertheless, the use of Mini LED technology with local dimming makes the overall image quality significantly better than in televisions without this technology. The effect is particularly noticeable when watching movies in a dark room—the blacks are deeper, and the contrast is more pronounced, allowing a full appreciation of details hidden in dark shots.