Active Full Array is a backlight technology where LEDs are divided into multiple zones that can brighten or dim independently.
This allows darker areas of the picture to stay deep black while brighter parts remain vivid, creating higher contrast and more realistic images.
It is especially effective in HDR content, where scenes often have both very bright highlights and very dark shadows.
See also: Local Dimming, HDR, Contrast Ratio, Backlight Control, OLED