Samsung Galaxy S6 Display screen black

[AC Question]

I have not dropped my phone or exposed to any type of liquid. Picked a song off of spotify and turned off my screen and set on my car seat. Picked up my phone 2 seconds later and the screen is black. I can see the notifications come in on the lock screen and its responsive on that screen (except my background is gone black) when I swipe the lock screen, everything beyond that is black. I can still make calls (by memory of touch) and its functioning.