Encapsulated photoelectrophoretic display
AssigneeE Ink Corporation
InventorSunil Krishna Sainis
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Abstract
The invention includes photoelectrophoretic displays and methods for creating reflective images using photoelectrophoretic displays. A photoelectrophoretic display typically includes a transparent electrode, an encapsulated photoelectrophoretic medium, and a rear electrode. An image is created by supplying an electrical potential between the electrodes that is insufficient to cause the photoelectrophoretic particles to move to the transparent electrode in the absence of incident light. In the presence of incident light, however, the photoelectrophoretic particles move to the viewing surface (transparent electrode), thereby producing an image.
Claims12
A method for creating a reflective image, comprising:
- providing a display including, in order,
- a transparent electrode,
- an encapsulated photoelectrophoretic medium layer comprising a plurality of gelatin coacervate capsules held by a polymeric binder, wherein the gelatin coacervate capsules contain a plurality of reflective photoelectrophoretic particles in an organic solvent, and
- a rear electrode;
- supplying a first electrical potential between the transparent electrode and the rear electrode;
- and
- exposing the display to a source of patterned light.
A system for providing a reflective image with a pattern, comprising:
- a display including, in order,
- a transparent electrode,
- an encapsulated photoelectrophoretic medium layer comprising a plurality of gelatin coacervate capsules held by a polymeric binder, wherein the gelatin coacervate capsules contain a plurality of reflective photoelectrophoretic particles in an organic solvent, and
- a rear electrode;
- a voltage supply for providing an electrical potential between the transparent electrode and the rear electrode;
- and
- an illumination source configured to illuminate a portion of the display with light to address the display.
Dependencies are inferred from the claim text.