Patent ID: 6873451
Filing Date: 2005-03-29
Classification: G09G

Abstract:
1. An electrophoretic display device for presenting an image by moving charged particles between a pair of display electrodes across which a voltage is applied, said electrophoretic display device comprising: a pair of substrates arranged with a predetermined gap maintained therebetween; a dispersing fluid disposed between said pair of substrates; a plurality of charged particles mixed in the dispersing fluid; at least a pair of display electrodes arranged on one of the substrates and defining a pixel; and a guard electrode arranged at a border between two adjacent pixels, wherein said guard electrode limits the movement of said charged particles to within a single pixel and, (1) wherein said guard electrode is set at a potential higher than each of said display electrodes of two adjacent pixels with the border therebetween if said particles are positively charged, or (2) wherein said guard electrode is set at a potential lower than each of said display electrodes of two adjacent pixels with the border if said particles are negatively charged.