Why do e-readers such as Kindle do not have a colour screen?
In: Technology
(Edit) This is specific to the E-ink screens.
So the screen works kind of like and etch-a-sketch. In that there are tiny black particle which are brought to the front of the screen by electro-static forces. Each of these particles represents a pixel and do NOT emit their own light. (There is a back light on some readers, but these particles will reflect ambient light)
In a conventional colour screen, there are red, green, and blue (RGB) sub-pixels which light up at different brightness levels to create the illusion of colour.
Since the reader’s pixels do not have different levels of light emission or reflectivity, there is no point in creating a screen with colour as the different light levels of RGB are required to create full colour images.
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