Dark corner

[Gaziki]

I have a feeling like down right corner of a tablet(when u hold it at full screen, horizontally with volume buttons on top) is quite darker than the rest of a screen. Specially noticable on brighter colors, like white and its radius is around 3-6 mm(in corner). From far away u might not see difference, but its noticable when u have this sight of a tablet on bright level.