ELECTROPHORETIC DISPLAY CELL

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is an electrophoretic display cell which is constructed to retard settling of heavy or agglomerated pigment particles. The cell comprises two parallel plate electrodes 1 separated by a filler 2 which occupies more than 50% of the cell volume. The filler, which is about one mil thick, is made of an insulating material having a microporous-like structure, such as -Celgardu (a trademark of Celanese Plastics Co.) which has a network of small openings approximately 0.4 x 0.04 microns in size. The pore size is large enough to permit the dye solution and small

XEROX DISCLOSURE JOURNAL

ELECTROPHORETIC DISPLAY CELL ^Proposed3oseph Sankus Classification

U.S. Cl. 204/299

mt. Cl. BOld 13/02

Disclosed is an electrophoretic display cell which is constructed to retard settling of heavy or agglomerated pigment particles. The cell comprises two parallel plate electrodes 1 separated by a filler 2 which occupies more than 50% of the cell volume. The filler, which is about one mil thick, is made of an insulating material having a microporous-like structure, such as ~Celgardu (a trademark of Celanese Plastics Co.) which has a network of small openings approximately 0.4 x 0.04 microns in size. The pore size is large enough to permit the dye solution and small

particle agglomerates 3 to pass through. The larger agglomerates can reside in the surface roughness of the filler which keeps them from settling to the bottom of the

cell.

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Volume 4 Number 3 May/3une 1979 311

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