Quote:
Originally Posted by salamanderjuice
You can turn that off on the Libra Colour, it's the "reduce rainbow effect" in reading settings.
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So, no it's not 150 ppi for the zillionith time.
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The setting is not needed if it was a real 300 dpi. It can only do 150 dpi perfectly.
It's basic mathematics and physics.
Pixel layout, where the R G B, unlike all other displays, don't cover the dots.
[
R][
G]
[
G][
B]
Thus a diagonal line pattern at 300 dpi resolution can be green or magenta, and black not white and black (or a slanted skinny font).
Some OLED displays, though few LCD displays, use the same 2 x 2 pattern. The mono resolution quoted is the same as the colour, 1/2 of the real pixel density. The stripe based LCD and OLED do something eink can't do, the actual pixels are not square, but a 3:1 shape so that the overall R G B is square.
Each dot R, G or B surrounded by white is on a 300 dpi grid. The colour print doesn't fully cover the pixel so that the display isn't too dark, that's why it can't do saturated colours.
Skinny white italic or oblique text on black will look the worst. It's better than Triton, which used simple stripes entirely covering the pixels, so vertical resolution was unaffected but horizontal was 1/3rd.
R G B
R G B
Just because marking claim it's 300 dpi in BW & 150 dpi in colour, and you are happy with it, doesn't make it really 300 dpi mono. It's impossible unless you take apart the screen and scrape the coloured printed dots off.