BTW, I doubt very much that what you are seeing here is backlight uniformity problems. This is actually an issue with the LCD element, the liquid crystal itsel

BTW, I doubt very much that what you are seeing here is backlight uniformity problems. This is actually an issue with the LCD element, the liquid crystal itself, and, possibly, to some extent, the optics. We used to manufacture advanced displays where uniformity and color accuracy was super important (think being able to identify healthy vs. cancerous tissue during endoscopic surgery). As incredible as LCD manufacturing is, the eye is amazing at being able to pick-out differences under the right conditions. All kinds of corrective work had to be applied to the displays in order to achieve uniform, repeatable and reliable color and image rendering performance.