Electrophoretic display device

Details Electrophoretic display device Electrophoretic display device

2006-03-07

2006-03-07

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C345S107000, C349S086000, C430S032000

Reexamination Certificate

active

07009756

ABSTRACT:
An electrophoretic display device capable of realizing a stable memory characteristic without relying on a circuit-open state is provided. The electrophoretic display device has a cell structure including at least two electrodes, fixing surfaces each associated with one of the at least two electrodes an electrophoretic layer disposed in the cell and comprising an insulating liquid and colored charged particles disposed in the electrophoretic layer, and voltage application device for applying a voltage between the electrodes thereby causing migration of the colored charged particles toward and collective attachment onto one of the fixing surfaces; wherein the fixing surfaces are provided with a charged film having a constant surface charge of a polarity opposite to that of the colored charged particles, regardless of a polarity of electricity supplied to the associated electrodes.

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