I'm not sure what would be causing that. If the spot was bigger, it might be a screen uniformity issue, but even then, that can be considered normal for screens.
I could suggest having it inspected by a technician, but it'd likely be an out of pocket expense unless it's within the warranty.
Was the area bumped or pushed in at any point?
I own a 6000 series LED HDTV, which I've enjoyed for many things such as for my PC and for playing video games. However I've noticed a sort of spot which has developed on my display.
It's a light spot that is honestly hard to notice when playing games, as it's just a slightly bit lighter than the surrounding area, but still the same color. When put onto a black background you can't see it. However when I'm using the display for my PC, since I'm on static color pages it is much easier to notice. When I get very close to the display I simply can't see it, but from a distance I can. I've tried to include a picture in which you can somewhat see the spot:
Basically no matter what color is displayed in that blotch area it will be lighter than the color around it. It appears on all my devices, easily recognizable when booting up my Xbox 360 and obviously my PC.
Any idea what it is? How I could fix it? Or will I have to have some sort of repair?