In the past 18 months, the smart phone market dominates one task – to distinguish itself from the infamous "cut" on the screen that features the front camera. Chinese Oppo has shown a definite solution to the problem, that is to place the camera the floor I'm the touch screen.
For that, some smart heads are needed, but as TechRadar writes, they seem to be close.
They call it USC feat or "Under-Screen Camera", which requires certain pixels to go off in the camera.
However, it seems that this is already half the solution, because, as The Verge can point it to, it is clear that a hacker can clearly see because the upper pixels are thinner. You can also see Oppos's own views of the USC, as well as the Verges image below.