Hisense is banking pretty hard on its new Dual Cell TV technology, which employs traditional local dimming along with two precision-bonded LCD layers (one cell for colour and a grayscale cell for luminance) in order to achieve previously unobtainable black levels on a non-OLED display.

In a nutshell, that means that Hisense’s 65SX is able to reach black levels that are incredibly close to that of an OLED television, only without sacrificing brightness and color.
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https://www.techradar.com/reviews/hisense-65sx-dual-cell-tv