I've looked at some threads here and those that deal with banding problems all have to do with backlighting issues and screen uniformity.
My problem is a little different.
I have an older model Sharp AQUOS HDTV and on analog movies where a large part of the screen is showing gray clouds or sky, or fog scenes, I get noticable curved lines that break the image into curvey horizontal sections down the picture. Not the same as dis-uniformity of backlighting as described elsewhere.
Anyone have an explanation for this phenomenon, or can you point me to a prior post?