While it is actually normal, some owners do not have this ring around their displays. I have it but with adjustments to my display, I eliminated it.Ya I fooled around with black level and gamma, didn't help though. Don't get me wrong, this is an awesome tv and the best pq for the money, I just had some bad luck and got a panel that has a funky defect. The unfortunate part is that Sony is saying it's normal. Funny thing is, when I thought about it after, she kept asking me what month I bought it in and when I said Nov, that's when she made reference to her notes about light bleed being normal...just saying lol?
Here's the thing, your have pictures showing the ring with brightness settings at max and min, that's the weird part. May I ask what content you are viewing? It's as if nothing is being adjusted at all.