Possible screen problem with iPhone 5 - normal?

I have an iPhone 5 purchased about 4 months ago and I'm not sure if this is a defect or not but when I boot up the iPhone and the Apple logo appears all around the logo is totally black except for the upper left corner. That corner has a yellowish/whitish tint when I assume like the rest of screen around the logo it should be totally black. There is no other issue or complaint about it I just I'm just wondering if this is common or can lead to future screen problems.

Thanks for all your input!

That's not normal. If you purchased the iPhone 5 new then it's still under warranty. Take it to an Apple store and have them check it out. If it's a screen defect, Apple will replace your iPhone with another.