eli5 What is the difference between a GameBoy screen (not backlight) and an E-Ink screen on devices like a Kindle?
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The Gameboy screen is LCD, with no power it is blank. With power the pixels can turn on and off. It uses a reflective material so that light falling on the screen is seen in “white” pixels and blocked in black ones.
E-Ink is completely different. With no power it shows whatever it was last ordered to show. The “pixels” are like little balls that are black on one side and white on the other. The only reason an E-Ink display blanks itself is to avoid fading of the black side of the balls. You only need to use power to flip the balls to the side you want, which makes for very, very low power consumption.
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