Rear electrode structures for electrophoretic displays
AssigneeE Ink Corporation
InventorsJonathan D. Albert, Barrett Comiskey, Joseph M. Jacobson
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Abstract
Novel addressing schemes for controlling electronically addressable displays include a scheme for rear-addressing displays, which allows for in-plane switching of the display material. Other schemes include a rear-addressing scheme which uses a retroreflecting surface to enable greater viewing angle and contrast. Another scheme includes an electrode structure that facilitates manufacture and control of a color display. Another electrode structure facilitates addressing a display using an electrostatic stylus. Methods of using the disclosed electrode structures are also disclosed. Another scheme includes devices combining display materials with silicon transistor addressing structures.
Claims15
An electrophoretic display comprising:
- a substrate;
- an electrophoretic display medium disposed adjacent said substrate, said display medium comprising a plurality of cavities dispersed in a polymeric matrix, wherein at least one of said plurality of cavities contains an electrophoretic contrast media phase that includes a suspending fluid and at least one charged particle, said charged particle having an optical property;
- and
- two electrodes disposed on said substrate adjacent said at least one of said plurality of cavities and positioned in a spaced apart relationship to one another, wherein a potential difference between said electrodes causes said at least one charged particle to migrate toward at least one of said two electrodes, thereby effecting a change in a visual state of said display.
An electrophoretic display comprising:
- an electrophoretic display medium comprising a plurality of cavities dispersed in a polymeric matrix, wherein at least one of said plurality of cavities contains an electrophoretic contrast media phase that includes a suspending fluid and at least one particle having a first optical property;
- two electrodes adjacent said electrophoretic display medium, each electrode having a second optical property;
- and
- at least one electrode having said first optical property adjacent said electrophoretic display medium, wherein application of a voltage potential to said two electrodes causes the at least one of said plurality of cavities to change visual state.
Dependencies are inferred from the claim text.