E Ink Kaleido 4 doubles color gamut, boosts contrast 50%

E-paper giant E Ink Holdings has officially launched its next-generation color e-paper technology, E Ink Kaleido 4. Chinese e-reader brand Hanvon Technology is the first to adopt the display, integrating it into its second-generation M10C smart e-paper notebook, making it the world's first commercial device powered by Kaleido 4.