The 65-inch Hisense UR9S has 1,056 local dimming zones. That's still quite a lot, though fewer than last year’s U8Q with a traditional QD Mini LED backlight. However, the raw number of zones doesn't determine black performance; how the TV controls them is equally important. Despite the smaller number of zones, the UR9S delivers a comparable level in this respect. The contrast we measured was very high in most scenes, reaching six-figure values. As a result, blacks look deep and the image retains good depth. Naturally, as with any Mini LED TV, a halo effect can appear around bright elements on a dark background, which lowers contrast in those areas. With the UR9S, the bloom is not as unnatural to the eye as on traditional Mini LED screens. The glow often takes on the color of the displayed object. If a small colored element appears on the screen, the backlight in that area glows in a similar color rather than creating a typical white halo. Of course, this is not a TV that can match OLED when it comes to blacks. Still, the UR9S is certainly among the better LCD TVs in its class.
Black performance on the TCL RM7L is really good. The combination of a high-contrast VA panel with a zone-based RGB Mini-LED backlight allows the TV to achieve very high contrast figures. In most of the scenes we measured, the results were good enough that dark parts of the image looked deep and convincing. The RM7L performs best in less demanding shots where black occupies a large portion of the screen and bright elements are relatively small. In such conditions contrast can reach six-figure values. As scene complexity increases, results gradually fall off, but that is a natural characteristic of any LCD TV using local dimming.
However, the RM7L has noticeably fewer zones than its counterpart using an SQD Mini-LED backlight. In the 65-inch version the difference is more than twofold, so you more often see more pronounced blooming around bright elements on a dark background. In terms of pure dimming precision, the RM7L is therefore not as accurate as the C7L. RGB Mini-LED has its own advantage here though. The bloom is not simply white, it takes on the color of the displayed element. A good example is the helicopter cockpit scene from Sicario 2, where a greenish bloom appears around the green lights instead of the typical bright halo known from conventional Mini-LED TVs. The halo effect is still visible, but because its color matches the image it is less distracting and looks more natural.
Ultimately we rate the RM7L and C7L similarly for black-level performance. The C7L controls the backlight better thanks to a larger number of zones, while the RM7L makes up for it with the character of its bloom. The bloom is somewhat larger, but its color blends better with the displayed image.
NOTE: Naturally, as the TV size increases the number of zones grows, yet we expect similar contrast results across RM7L sizes. It’s also worth adding that TCL lists the number of "color zones" in its product brochures, not the actual dimming zones. Since each color zone consists of three RGB channels, the advertised number should be divided by three. Therefore 1,344 color zones in the 65-inch unit we tested mean 448 actual dimming zones.
Size | Dimming zones (actual) | Color zones |
|---|
65" | 448 | 1344 |
75" | 600 | 1800 |
85" | 720 | 2160 |
98" | 960 | 2880 |