Very thin black line on one side of my tv almost invisible

Hi I have very thin black lines on my tv and I have no idea what it means they are almost invisible but I can see them I have a sharp 4K tv I’m not sure on the exact model it’s has thin gray Edge I need help figuring out what this is and what I should do

I took pics of what it looks like one side is the side with the thin black line and one side shows no like Ik it’s not the hdmi or anything like that because it’s on everything I go to PS4,chromecast,settings menu