short camera blink, flicker while closing

[noodles222]

Hi all, new here

Just curious, when closing camera with back button, can you see very very short blink of the screen? something like very short flicker. I think this was presented also in my Galaxy S4.. if someone can explain me, whats that, would appreciate

Thanks

EDIT: ok, i found out, that while changing screen tone into for example FILM, or STANDARD - this filcker in camera changes. so I guess that camera is checking before it closes, what screen tone there is... But, for example while taking photos whith Instagram, there is no flicker at all