A:Answer QLED, WILL NOT BURN IN! Just like LCD-LED TV didn't burn in.
OLED, is a different animal, OLED supplies it's own light for each pixel so there is no backlight. Im not sure which layer of the stack breaks down to cause the shadow [burn in] but it CAN'T BE FIXED.
Now the Qled uses LEDS to supply the light either from the edge or behind. The Qled stack has a layer of Quantum Dot material layered in the stack and that.will never burn in.
OLED is fantastic but not worth the strong possibility of burn in for the money spent.