Supreme UHD Dimming is a trademark for which the application was filed in January 2016 by Samsung. One of the names of local dimming technology for UHD TVs.
This local dimming system on Samsung TVs was first implemented on 9th series TVs with SUHD screens, on quantum dots, in 2018 this technology was also applied on 7th series TVs. There are a lot of names for local dimming. Samsung is not an exception to the Supreme UHD Dimming, the local dimming system for quantum dot TVs (similar to the name of the TV Super and Supreme) on UHD TVs is simply UHD Dimming.
Although if you think that this technology is declared in televisions with screens that, in principle, do not provide for screen backlighting, since quantum dots themselves generate light, but this is in the future. At this time, TVs with screens on quantum dots, the screen backlight is used.
The very principle of the backlight operation is reduced to turning off the screen backlight zones, which provides a more black color on the TV screen. The principle of the backlight was developed from darkening in large areas, to darkening in small areas. Supreme UHD Dimming and UHD Dimming are just another improvement in dimming technology and this technology is used only on 4K TVs (UHD) screen resolutions.