[semi-extrinsic]

No, a friend of mine works in the startup Elliptic Labs that is working with Xiaomi on this. Their tech replaces the usual IR sensor package above the phone screen with an ultrasound based sensor that can sit behind the display.

[martin_henk]

I see... Would like to know how they do the bezel less part construction wise. Sharp uses the topglass as a kind of lens. That lenseffect 'covers' the actual bezel beneath...