E Ink Corporation

Mary E Parent

Stephen J Telfer

Abraham Berhane

Ali Sarvi

Kenneth R Crounse

The present invention is directed to an aqueous sealing composition that comprises a combination of polymers, a poly(vinyl alcohol) homopolymer or poly(vinyl alcohol-co-ethylene) copolymer and a polyurethane, a conductive filler, and a water-soluble ether in an aqueous carrier. The aqueous sealing composition may be used to form a sealing film in electro-optic devices having an electro-optic material layer, comprising (a) a plurality of microcells filled with charged particles and a non-polar fluid and (b) a sealing film, wherein the electro-optic material layer is disposed between two electrode layers. The device exhibits good electro-optic performance.

Sealing film compositions for sealing microcells of electro-optic devices

The present invention is directed to a sealing layer that comprises a poly(vinyl alcohol) homopolymer or a poly(vinyl alcohol-co-ethylene) copolymer, a polyurethane, and a conductive filler. The sealing layer shows good barrier properties to a non-polar fluid. The sealing layer can be used to seal microcells of electro-optic devices, contributing to improved good electro-optic performance of the device, especially at low temperatures.

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Mountain View, CA, United States of America

Mary E Parent