@qlp this myth just won't die: "the company e-ink has the patents now, and I think that's the reason why e-paper products are still so expensive"
No, e-ink screens are expensive because they have no scale compared to LCDs - there are 6 billion smartphone owners in the world, and plenty of them have a TV/laptop/desktop-monitor/smartwatch/tablet. And another at work, and e.g. supermarket kiosk.
E-ink has kindles and supermarket tags. Repeat after me: economy of scale.
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