Patent ID: 8120838

Claim:
An electrophoretic display (EPD) device, comprising: (a) a substrate having a top surface and an opposite, bottom surface; (b) a solar cell formed on the top surface of the substrate; (c) an electrophoretic display panel having a plurality of electrophoretic cell structures spatially arranged in a matrix form, wherein each electrophoretic cell structure defines a middle area and a side area surrounding the middle area, and contains a plurality of charged particles movable in the electrophoretic cell structure responsively to applied fields; (d) a top electrode member formed on the electrophoretic display panel; and (e) a bottom electrode member formed between the solar cell and the electrophoretic display panel, having a plurality of bottom electrodes and in-plane switching (IPS) electrodes, wherein each IPS electrode is positioned in relation to a corresponding electrophoretic cell structure for controlling movements of the charged particles therein along a horizontal direction parallel to the electrophoretic display panel, and wherein each bottom electrode is positioned in relation to the IPS electrode and the corresponding electrophoretic cell structure for controlling movements of the charged particles therein along a vertical direction perpendicular to the electrophoretic display panel.