The Samsung S90D uses a unique subpixel structure. Instead of having all three subpixels in a row, each pixel forms a triangle, with the larger green subpixel at the top. This leads to color fringing, which is noticeable when displaying any content with horizontal lines, and it’s especially bad when you use the TV as a PC monitor. For example, on a bright window on a Windows PC, you might notice a green fringe at the top since that’s where the green subpixel is.

Similarly, you can notice a purple fringe at the bottom of bright windows, as that’s where the red and blue subpixels are. Furthermore, with this subpixel arrangement, text has just okay clarity on a PC, as Windows ClearType settings aren’t designed for this subpixel structure and can’t correct for it.

Note that the 42-inch, 48-inch, and 83-inch models only use a WOLED panel, which uses a different subpixel structure than the other QD-OLED models. It’s also possible that you end up with a WOLED panel on the other sizes since Samsung decided that they’re releasing the same-sized models with both WOLED and QD-OLED panels, and there isn’t a simple way to determine what panel type you’re getting.