Dell Inspiron 15 (3521) Corner Suddenly Dim

Yesterday I was using my laptop, everything was fine until I adjusted the lid just a little bit. Suddenly the right bottom corner became very dim, almost so dim that I can't see anything in that area, and the rest of the bottom of the screen up to about the middle became slightly dimmer as well. If I let my computer sleep for awhile and then open it again, it goes away, but the second I adjust the lid even the tiniest bit it comes back. Is this an issue with the screen itself or is it something with the OS?