It's not so visible as here, but it still exists. How does the black screen with 100% brightness look on your iPhone?
So you're saying that you don't have that issue?
OK, yeah, if I set my phone to 100% bright with a black screen in a dark room, I can detect a bit of bleed on the edges of the screen.
That said - why would you have your phone at 100% brightness in a dark room? Is this a "real world" problem in any way, or are you just looking for something to complain about?
It's fairly common to watch a movie on your phone while in bed... if the film was letter boxed, you'd have black around the edges with brightness turned on high.
... N/c.So I always stare at a black screen at 100% brightness.