Dielectrophoretic displays
AssigneeE Ink Corporation
InventorsAlexi C. Arango, Joseph M. Jacobson, Karl R. Amundson
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Abstract
A dielectrophoretic display comprises a substrate having walls defining at least one cavity, the cavity having a viewing surface and a side wall inclined to the viewing surface; a suspending fluid contained within the cavity; a plurality of at least one type of particle suspended within the suspending fluid; and means for applying to the fluid an electric field effect effective to cause dielectrophoretic movement of the particles to the side wall of the cavity.
Claims29
A dielectrophoretic display comprising:
- a substrate having walls defining at least one cavity, the cavity having a viewing surface and a side wall inclined to the viewing surface;
- a fluid contained within the cavity;
- a plurality of at least one type of solid particle within the fluid;
- and
- means for applying to the fluid an electric field effective to cause dielectrophoretic movement of the solid particles to the side wall of the cavity.
A process for operating a dielectrophoretic display, the process comprising:
- providing a substrate having walls defining at least one cavity, the cavity having a viewing surface and a side wall inclined to the viewing surface;
- a fluid contained within the cavity;
- and a plurality of at least one type of solid particle within the fluid;
- and
- applying to the fluid an electric field effective to cause dielectrophoretic movement of the solid particles to the side wall of the cavity.
A dielectrophoretic display comprising:
- a substrate having walls defining at least one cavity, the cavity having a viewing surface and a side wall inclined to the viewing surface;
- a fluid contained within the cavity;
- a plurality of at least one type of solid electrically charged particle within the fluid, the solid particles having a first optical characteristic;
- a backing member disposed on the opposed side of the cavity from the viewing surface, at least part of the backing member having a second optical characteristic different from the first optical characteristics, the backing member being light-transmissive;
- and
- means for applying to the substrate an electric field effective to cause dielectrophoretic movement of the solid particles to the side wall of the cavity.
A process for operating a dielectrophoretic display, the process comprising:
- providing a substrate having walls defining at least one cavity, the cavity having a viewing surface and a side wall inclined to the viewing surface, a fluid contained within the cavity;
- and a plurality of at least one type of solid, electrically charged particle within the fluid, the particles having a first optical characteristic;
- and a backing member disposed on the opposed side of the cavity from the viewing surface, at least part of the backing member having a second optical characteristic different from the first optical characteristic, the backing member being light-transmissive;
- and
- applying to the substrate an electric field effective to cause dielectrophoretic movement of the solid particles to the side wall of the cavity.
An electronically addressable display comprising a microencapsulated display medium including a first species having a higher dielectric constant and a second species having a lower dielectric constant;
- and electrodes disposed adjacent the display medium for selectively creating regions of higher and lower electric field, the display medium comprising a bichromal microsphere having a first hemisphere and a second hemisphere differing in dielectric constants, wherein the first species of higher dielectric constant comprises the first hemisphere and the second species of lower dielectric constant comprises the second hemisphere.
An electronically addressable display comprising a microencapsulated display medium including a first species having a higher dielectric constant and a second species having a lower dielectric constant;
- and electrodes disposed adjacent the display medium for selectively creating regions of higher and lower electric field, the display medium comprising a first species of colored solid particles having a higher dielectric constant and a second species of colored solid particles having a lower dielectric constant.
A process for operating a dielectrophoretic display, the process comprising:
- providing a substrate having walls defining at least one cavity, the cavity having a viewing surface and a side wall inclined to the viewing surface, a fluid contained within the cavity;
- and a plurality of solid particles within the fluid, the particles having a dielectric constant higher than the dielectric constant of the fluid;
- and
- applying to the substrate a non-homogeneous electric field, the electric field being greater adjacent the side wall than in the center of the cavity, thereby causing the solid particles to move to the side wall of the cavity.
A process for operating a dielectrophoretic display, the process comprising:
- providing a substrate having walls defining at least one cavity, the cavity having a viewing surface and a side wall inclined to the viewing surface, a fluid contained within the cavity;
- and a plurality of solid particles within the fluid, the particles having a dielectric constant lower than the dielectric constant of the fluid;
- and
- applying to the substrate a non-homogeneous electric field, the electric field being smaller adjacent the side wall than in the center of the cavity, thereby causing the solid particles to move to the side wall of the cavity.
Dependencies are inferred from the claim text.