Patent ID: 8054535

Claim:
A multi-stable electrophoretic display device having a plurality of pixels and comprising a first substrate and a second substrate, the substrates being spaced apart from each other and enclosing a layer of an electrophoretic medium comprising a liquid crystal material having pigment particles dispersed therein; and opposing electrode lines corresponding to each of said pixels and for selectively applying an electric field across at least some of the electrophoretic medium in each pixel area; wherein said opposing electrode lines for each pixel are coplanar on said first substrate; wherein the electrode lines effect switching between a first optical state in which said pigment particles are collected around one of two electrode lines for a pixel such that most light incident on that pixel does not impinge on a pigment particle, and a second optical state in which said pigment particles are held in a space between said two electrode lines for that pixel such that most light incident on that pixel impinges on pigment particles.