Electrophoretic display device

Abstract

An electrophoretic display device comprises a first substrate and a second substrate positioned to face each other. A first electrode is so mounted to the first substrate as to face second and third electrodes. The second and third electrodes have an area smaller than that of the first electrode. Also, the distance between the second and third electrodes is set shorter than the distance between the second and first electrodes and the distance between the third and electrodes. A suspension dispersing charged fine particles in an insulating liquid medium is interposed between the first electrode and the second and third electrodes. An AC voltage is applied between the second and third electrodes, and a DC voltage is applied between the first electrode and the second and third electrodes. Thus, the migration of charged fine particles are controlled in accordance with the dielectrophoretic and electrophoretic forces.

1 - 3 . (canceled)  
   
   
       4 . An electrophoretic display device comprising: 
 a first substrate and a second substrate positioned to face each other;    a first electrode mounted to the first substrate;    a second electrode and a third electrode, which are positioned to face the first electrode, each of the second electrode and the third electrode having an area smaller than that of the first electrode, and the distance between the second electrode and the third electrode being set shorter than each of the distance between the second electrode and the first electrode and the distance between the third electrode and the first electrode;    a suspension layer received in a space between the first electrode and each of the second and third electrodes, including insulating liquid medium and charged fine particles dispersed in the insulating liquid medium;    a power source section configured to apply an AC voltage between the second electrode and the third electrode and apply a DC voltage between the first electrode and each of the second and third electrodes;    partition walls configured to partition the space between the first substrate and the second substrate; and    a fourth electrode and a fifth electrode, which are mounted to the partition walls, wherein an AC voltage is further applied between the second electrode and the fourth electrode and between the third electrode and the fifth electrode from the power source section.    
   
   
       5 - 17 . (canceled)