Patent ID: 6677926
Filing Date: 2004-01-13
Classification: G02F

Abstract:
An electrophoretic display sheet comprising:a first transparent non-conductive layer; a second non-conductive layer spaced from and opposed to said first non-conductive layer; a medial layer inserted between said first non-conductive layer and said second non-conductive layer, wherein said medial layer comprises a plurality of opaque spheres, said spheres forming cavities between said first non-conductive layer and said second non-conductive layer; and an electrophoretic suspension layer comprising at least one electrophoretic material comprising a plurality of electrophoretic pigment particles suspended in a suspending medium comprising an electrically insulating medium, wherein said electrophoretic suspension layer is contained in said cavities formed between the outer surfaces of said spheres and the inner surfaces of said first non-conductive layer and said second non-conductive layer, and wherein said electrophoretic pigments migrate through said cavities to perform a display operation when driven by an appliede electrophoretic force.