Quote:
Originally Posted by Quoth
No, the coloured dots are printed on the mono screen, so though it can be driven at 300 dpi for monochrome content, it's less resolution than a plain mono 300 dpi screen. Also at 300 dpi certain mono content gives false colour artefacts. If the page is colour, then likely any text is also 150 dpi. The 300 dpi mono mode only works at all because unlike LCD or OLED the printed CFA dots don't fill the native mono dots. This also results in the screen being brighter than eink Triton (where the CFA entirely covers pixels) and means it also can only do the less than 4080 colours as pastel shades (the 4096 total includes White, black, 14 grays and some indistinguishable shades).
Originally the Kindle was 167 dpi and the DX family are all 150 dpi, so it can look reasonable.
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Sigh. This again. No, B&W text is at 300 DPI, B&W line-art is also 300 DPI. Colour is 150 DPI. Even on pages that mix both. You'd know this if you'd used a Kaleido 3 device for more than an hour and had good enough close vision eyesight to see it. There is some sharpness loss because of the colour layer on B&W content compared to the same non-colour screen but it is nowhere near the difference between 150 DPI and 300 DPI. To me it still looks better than the 200DPI devices I have.
It's really obvious if you just make an ePub that has one sentence in a color and the other be black and white. The pixellation of colour sentence really stands out and looks pretty similar to an older eReader.
Kobo's rainbow reduction mode at least doesn't make B&W content 150 DPI either.