E Ink Holdings reported their financial results for 2015. The ePaper maker says the profit grew to $16.7 million (up from $0.4 million in 2014) mostly due to higher royalty income and better gross margins (31% in 2015, up from 22% in 2014).

E Ink's royalties come from its LCD business, as its subsidiary Hydis Technologies owns some important LCD patents that it licenses to other makers. Hydis itself stopped making LCDs in 2014.

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