Electrophoretic displays
First Claim
Patent Images
1. A display comprising:
- a substrate having walls defining at least one cavity, the cavity having a viewing surface, a rear surface on the opposed side of the cavity from the viewing surface, and at least one side wall extending between the viewing surface and the rear surface;
a colored fluid contained within the cavity;
a plurality of electrically charged solid particles within the fluid;
a front electrode adjacent the viewing surface of the cavity;
a rear electrode adjacent the rear surface; and
a side electrode adjacent the side wall,the display having a first optical state in which the solid particles lie adjacent the front electrode, a second optical state in which the solid particles lie adjacent the rear electrode and a third optical state in which the solid particles lie adjacent the side electrode.
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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 effective to cause dielectrophoretic movement of the particles to the side wall of the cavity.
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Citations
12 Claims
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1. A display comprising:
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a substrate having walls defining at least one cavity, the cavity having a viewing surface, a rear surface on the opposed side of the cavity from the viewing surface, and at least one side wall extending between the viewing surface and the rear surface; a colored fluid contained within the cavity; a plurality of electrically charged solid particles within the fluid; a front electrode adjacent the viewing surface of the cavity; a rear electrode adjacent the rear surface; and a side electrode adjacent the side wall, the display having a first optical state in which the solid particles lie adjacent the front electrode, a second optical state in which the solid particles lie adjacent the rear electrode and a third optical state in which the solid particles lie adjacent the side electrode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A process for operating a display, the process comprising:
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providing a substrate having walls defining at least one cavity, the cavity having a viewing surface, a rear surface on the opposed side of the cavity from the viewing surface, and at least one side wall extending between the viewing surface and the rear surface;
a colored fluid contained within the cavity;
a plurality of electrically charged solid particles within the fluid;
a front electrode adjacent the viewing surface of the cavity;
a rear electrode adjacent the rear surface; and
a side electrode adjacent the side wall; andapplying to the front, rear and side electrodes electrical potentials effective to cause the solid particles fluid to assume; (a) a first position in which the solid particles lie adjacent the front electrode, and the display shows a first optical state; (b) a second position in which the solid particles lie adjacent the rear electrode and the display shows a second optical state; and (c) a third position in which the solid particles lie adjacent the side electrode and the display shows a third optical state. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification