Electrophoretic displays are not just "screens that don't glow." This is how E Ink actually works — microcapsules, the TFT backplane, waveforms and ghosting — and an honest accounting of what an e-reader buys you over a phone or tablet, where it falls down, and how to get the most out of one.
Ereaders
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E Ink and the E-Reader: What the Screen Buys You, and What It Costs