E-ink (also eInk) is a specific proprietary type of electronic paper manufactured by E Ink Corporation, founded in 1997. It is based on research that started at the MIT Media Lab. Currently available commercially in grayscale only and commonly used in mobile devices such as e-book readers and to a lesser extent mobile phones and watches.
E-ink displays do not require any background lighting and are easy to read, even in direct sunlight. They only require power for turning pages, so they do not consume a lot of battery power so a charged device can be used for several thousand pages or several weeks before there is a need to recharge it.
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