I find the term "direct" (as opposed to "edge") in the "Backlight" column of television spec sheets for some "full array" products.
Panel manufacturers refer to only 'edge' or 'direct' type backlights.
Full Array has been intended to refer to the density of LEDs on the backlight - where 'direct' may include a small number of lights positioned further from the panel (and so thicker TVs), 'full array' should have a denser array of more LEDs positioned closer to the panel.
If a TV supports local dimming, it should be full array, but different manufacturers have taken differing positions in adopting this language.
Vizio seems to have embraced the use of 'Full Array' to differentiate their FALD technology.