[pdurrant]

Originally Posted by DuckieTigger

This one https://www.digitec.ch/en/amp-page/t...r-screen-17060 says that it has 300dpi in b/w mode, 100dpi in color. Does that mean that the color layer can be turned on and off with software?

From the Wiki, here's a close-up of the screen:



And from another thread, a closeup showing some 'black' areas:



The switchable elements are at 300dpi. The colours are at 100dpi. Because of the offsets of the colours, any area now black at 300dpi will blend to white, so for a black and white image the screen appears to be 300dpi. When colour is overlaid, it can has a 100dpi resolution.

In the difference of resolutions, it's rather like old PAL TV. A high res monochrome overlaid with a lower resolution colour image.