US 11,809,057 B2
Pressure-sensitive writing media comprising electrophoretic materials
Sunil Krishna Sainis, Melrose, MA (US); Seth J. Bishop, Framingham, MA (US); Kosta Ladavac, Somerville, MA (US); Stephen J. Telfer, Arlington, MA (US); and Richard J. Paolini, Jr., Framingham, MA (US)
Assigned to E Ink Corporation, Billerica, MA (US)
Filed by E INK CORPORATION, Billerica, MA (US)
Filed on Oct. 13, 2021, as Appl. No. 17/500,209.
Application 17/500,209 is a division of application No. 16/680,950, filed on Nov. 12, 2019, granted, now 11,249,367.
Claims priority of provisional application 62/773,891, filed on Nov. 30, 2018.
Prior Publication US 2022/0066277 A1, Mar. 3, 2022
Int. Cl. G02F 1/01 (2006.01); G02F 1/167 (2019.01); G02F 1/1685 (2019.01)
CPC G02F 1/1685 (2019.01) [G02F 1/0128 (2013.01); G02F 1/167 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A pressure-sensitive electrophoretic display, the display comprising:
a magnetic layer configured to produce a magnetic field;
an electrophoretic layer comprising an electrically- and magnetically-addressable ink medium and configured to locally change state based on an applied pressure; and
a deformable layer located between the magnetic layer and the electrophoretic layer,
wherein applying a pressure to a location on the pressure-sensitive electrophoretic display causes a displacement of at least a part of the deformable layer, allowing the electrophoretic layer to move closer to the magnetic layer, thereby causing a change in the magnetic field experienced by a portion of the electrophoretic layer located at the location, thereby causing a local change of state in the electrophoretic layer.