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1. (WO2017040609) ELECTRONICALLY ERASING A DRAWING DEVICE

Pub. No.:    WO/2017/040609    International Application No.:    PCT/US2016/049626
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Thu Sep 01 01:59:59 CEST 2016
IPC: G02F 1/167
Applicants: E INK CORPORATION
Inventors: PAOLINI, Richard J., Jr.
TELFER, Stephen J.
Title: ELECTRONICALLY ERASING A DRAWING DEVICE
Abstract:
Devices and techniques for electronically erasing an externally addressed electrophoretic drawing device are described. An electronically-erasable drawing device (100; 300; 500; 600) comprises an electro-optic display medium (13; 316; 516) and interdigitated electrodes (332, 334) disposed adjacent one surface of the medium and configured to drive the medium to an intermediate (gray) optical state. A mobile electronic drawing implement (20; 20a; 20b) may include electrodes (26a, 26b, 26c) configured to apply a fringing electric field to an electro-optic display medium from one side of the medium, the fringing electric field being arranged to drive a portion of the display medium adjacent the implement to an intermediate optical state, the electrodes being movable relative to the medium.