And I have to point out that just googling for E Ink patents doesn't help us understand what point you are making. It is the equivalent of me claiming that Microsoft is blocking operating system progress and then justifying it by giving you a set of Microsoft patents. I hope the analogy is clear.
https://patents.google.com/patent/US20080043317A1/en
https://patents.justia.com/assignee/e-ink-corporation
https://patents.google.com/patent/US9341917B1/en
https://stks.freshpatents.com/E-Ink-Holdings-Inc-nm1.php