As well as being used for in-store signage, E Ink's technology powers Sony's e-book reader, and in April, Seiko, a watchmaker, unveiled a digital watch built around an E Ink display.

ECONOMIST: REPORTS

Sony has introduced an e-book reader that uses electrophoretic materials to provide a high-resolution, high-contrast display.

ECONOMIST: REPORTS

Can Barnes and Noble or Sony really take a bite out of the e-book reader market by dethroning the iPad or the Kindle?

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