E Ink upgraded the screen found in most color e-readers

E Ink announced the next generation of its Kaleido color e-paper screen technology today, delivering several welcome improvements. The company's existing Kaleido 3 displays can be found in e-readers and tablets from companies like Kobo , PocketBook , and Boox , while Amazon's Kindle Colorsoft uses a customized version to improve performance. The new Kaleido 4 technology addresses some of Kaleido 3's shortcomings with improved color reproduction, better contrast, and faster screen refreshes.