Horizontal lines lg g2 screen

Hi I just got my new LG G2 about a week ago, but I noticed there are these small barely visible horizontal lines across the screen, but they only appear in certain applications, specially when there's text or white objects contrasting darker backgrounds, lines appear to come from the text and or objects and extend thru them like the objects are sending them sideways is very weird, immediately I thought the screen came bad but I've been thinking it could be a software issue because as I said, most of the time they are nowhere to be seen like in the lockscreen or when playing games, in those screens the display just look gorgeous and has no issues, its only in certain occasion that you can see them, has this happened to anybody else and do u have any idea on how to fix it with software? or is the display just bad and I have to return the phone? I imported it so it would be a real pain to send it back for a refund.

EDIT: apparently I cant upload images larger than 256kb WTF? the last time I took a 256kb picture was in 2005...