US 11,749,218 B2
Method of forming an electro-optic medium
Peter Carsten Bailey Widger, Nashua, NH (US); Jay William Anseth, Canton, MA (US); Richard J. Paolini, Jr., Framingham, MA (US); Mark Benjamin Romanowsky, Cambridge, MA (US); Jillian Smith, Dorchester, MA (US); Stephen J. Telfer, Arlington, MA (US); Craig Alan Breen, Arlington, MA (US); and Stephen Bull, Windham, NH (US)
Assigned to E Ink Corporation, Billerica, MA (US)
Filed by E INK CORPORATION, Billerica, MA (US)
Filed on Sep. 17, 2020, as Appl. No. 17/23,687.
Application 17/023,687 is a division of application No. 16/008,180, filed on Jun. 14, 2018, granted, now 10,809,590.
Claims priority of provisional application 62/673,743, filed on May 18, 2018.
Claims priority of provisional application 62/563,137, filed on Sep. 26, 2017.
Claims priority of provisional application 62/520,629, filed on Jun. 16, 2017.
Claims priority of provisional application 62/520,699, filed on Jun. 16, 2017.
Claims priority of provisional application 62/520,731, filed on Jun. 16, 2017.
Claims priority of provisional application 62/520,600, filed on Jun. 16, 2017.
Prior Publication US 2021/0002488 A1, Jan. 7, 2021
Int. Cl. G02B 26/00 (2006.01); G09G 3/34 (2006.01); G02F 1/167 (2019.01); C09B 67/08 (2006.01); G02F 1/1676 (2019.01); G02F 1/16757 (2019.01); G02F 1/1677 (2019.01); G02F 1/1675 (2019.01); B82Y 30/00 (2011.01)
CPC G09G 3/344 (2013.01) [C09B 67/0013 (2013.01); G02F 1/167 (2013.01); G02F 1/1675 (2019.01); G02F 1/1676 (2019.01); G02F 1/1677 (2019.01); G02F 1/16757 (2019.01); B82Y 30/00 (2013.01); G02F 2001/1678 (2013.01); G02F 2202/022 (2013.01); G02F 2202/28 (2013.01); G09G 2320/0233 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of forming an electro-optic medium comprising:
providing an internal phase mixture of a non-polar solvent and charged pigment particles,
encapsulating portions of the internal phase mixture in a plurality of capsules,
sieving the plurality of capsules into at least two portions, a first portion comprising capsules having a size distribution between 50 μm and 90 μm in diameter, and a second portion comprising capsules having a size distribution between 20 μm and 49 μm in diameter, and
mixing a polymeric binder with two to five parts by weight of the first portion and one part by weight of the second portion.