BARRIER STRUCTURES FOR PREVENTION OF LATERAL MIGRATION IN ELECTROPHORETIC DISPLAY DEVICES
Original Publication Date: 1980-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
Disclosed is an electrophoretic display device provided with internal barrier walls for preventing lateral migration of pigment particles. Such deleterious pigment movement can be caused by particles travelling from an image element under zero field to a neighboring one being driven by a finite voltage. It has been found that the introduction of a barrier grid having the same thickness as the cell is practically impossible to fill and further that any variations in height reduce the the effectiveness of lateral migration prevention. Thus, this improved display device comprises a cell with swellable barrier structures.