this post was submitted on 09 Nov 2025
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Color CRTs required having three different phosphors for three different colors. This inherently put a maximum resolution dependent on the size of the repeating pattern of three phosphors. It also demanded that the used resolution be a multiple of the phosphor resolution. Much like modern LCDs. See here.
That doesn’t say that they can’t change their resolution just that they are limited to specific ones. LCDs physically cannot change the number of pixels being shown no matter what resolution you throw at it.
You are misunderstanding how color CRTs function. See dot pitch. Using a resolution that is incorrect for your display has functionally the same result of blurriness and interference patterns on color CRTs and LCDs. The difference is that on a color CRT the effect is a product of the physical structure of the display, and not a digital scaler. You cannot use arbitrary resolutions on color CRTs as you claim.
I didn’t say you could use arbitrary resolutions, I said you could change the resolution. I think it is you who is misunderstanding. CRT’s don’t scale, they change the number of pixels they show. If you show an 800 x 600 image on a CRT monitor, it will have 800 x 600 pixels. If you show an 800 x 600 image on an LCD, it will still have however many pixels the LCD has.