Hisense’s Dual-Screen ULED XD Tech to Offer Deeper Blacks than LCDs

HDR displays rely on two factors, support for a wide colour gamut and the ability to showcase extreme contrast ratios. HDR screens need to be able to present, deeper blacks, brighter highlights and a broader, more accurate range of colours to deliver the full HDR experience. 

So far, only OLED monitors have been able to deliver HDR experiences to their fullest extent, with their ability to turn off individual pixel offering backs that are as deep as they can get. You can’t get any darker than a pixel that’s transmitting no light. 

LCD-based HDR screens have a harder time achieving the same contrast levels as OLED displays, as their always-on backlights will result in some light passing through pixels, even when they are supposed to let no light through. Solutions to this have been to implement forms of “local dimming” into an LCD’s backlight, but Hisense has created a new solution, one which isn’t incompatible with other “local dimming” technologies. 

Hisense has created what they call ULED XD, a technology which uses a 4K RGB panel and secondary greyscale 1080p panel, which sits between the primary panel and the device’s LED backlight. 

In effect, this creates over two million (1920×1080) local dimming zones, as light from the device’s LED backlight needs to pass through the display’s black/white pixel grid before passing through the standard RGB panel. This results in deeper blacks, as light from the display’s LED backlight would need to pass through two light blacking screens before being emitted from the display, presenting deeper blacks than normal LCDs. 

Hisense’s ULED XD Technology is said to use “better chipsets and processing algorithms to offer “incredibly deep blacks and dazzling brightness, promising peak brightness levels of around 2,900 nits. A combination of Hisense’s dual-panel ULED XD tech and normal local-dimming techniques to offer such high peak brightness levels while also offering the “highest dynamic range” seen on an LCD panel.