iPhone turning its screen on in pocket

[t56camaro]

Hey everyone, let's see if anyone has had any experience like this. Sometimes I'll take my phone out of my pocket without touching any buttons and the screen will be on and showing solid black. Other times I'll have the phone sitting out in front of me on a desk or something, and out of the corner of my eye I see the screen turn itself on to the solid black screen. And then if I sit and watch it, the screen seems to turn itself off one vertical line at a time, as if someone is drawing on it like you would on a etch-e-sketch. I'm hoping that the screen isn't doing any damage to itself by cycling on and off, and then whatever is going on with the way its shutting itself off one line at a time, but my bigger concern is if its draining battery every time it decides to turn itself on. Anyone had this problem?