Steel/Saphire screen - just noticed something

Point a light at it and look closely. You can see a very thin line which goes all around the display (a few mm outside the actual display). I tried to take a photo but it's hard to see. It's either the area the coating is covering or a piece of sapphire is fused to the glass. I remember seeing a patent for this.

Can anyone else see it? does it appear on the sports? (i never noticed it before on my old sports).

--- Post Merged, Apr 13, 2017 ---

or is it where the lcd is fused underneath? really hard to tell