I forgot to mention the other really clever bit.
Ordinary LCD screens create the sub-pixels with colour filters that block out 2/3 of the light passing through. Not very efficient, but they're /always/ coloured.
The Pixel Qi screen creates the colour by a system of diffraction gratings and lenses that split the backlight into RGB diagonal stripes across the screen. This is why the pixels are black and white in reflective mode, and colour only when the backlight is on.
Quote:
Originally Posted by pdurrant
The Pixel Qi screen does it completely differently. It doesn't have sub-pixels at all. Only square pixels at around 200dpi. This, obviously, works fine for black and white. It the adding in of colour that's clever.
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