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US 7,352,503 B2Granted
Two-particle electrophoretic ink for microencapsulated flexible electronic display
AssigneeXerox Corporation
InventorsSan-Ming Yang, Naveen Chopra, Gabriel Iftime, Ahmed Alzamly, Man-Chung Tam, Peter Kazmaier
Life of this patent
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Abstract
Exemplary electrophoretic ink capsules for electrophoretic displays, and methods for making the exemplary electrophoretic ink capsules are disclosed. In various embodiments, the electrophoretic ink capsules can include triboelectrically charged electrophoretic particles having higher electrical conductivity than conventionally charged electrophoretic particles allowing fabrication of electrophoretic displays with lower switching fields and faster response times.
Claims13
An electrophoretic ink capsule comprising:
- a first plurality of triboelectrically charged particles;
- a second plurality of triboelectrically charged particles;
- a non-polar liquid;
- and
- a shell encapsulating the first plurality of particles, the second plurality of particles, and the non-polar liquid,
- wherein the first plurality of triboelectrically charged particles move in a first direction within the non-polar liquid in response to an applied electric field and the second plurality of triboelectrically charged particles move in an opposite direction within the non-polar liquid in response to the applied electric field;
- and
- wherein the electrophoretic ink capsule has an electrical conductivity of about 10−11 Scm−1 or less.
5 more elements
An electrophoretic display comprising:
- a first substrate;
- a conductive layer on the first substrate;
- and
- a first polyvinyl acetate layer comprising a plurality of electrophoretic ink capsules having an electrical conductivity of about 10−11 Scm−1 or less, and wherein
- the electrophoretic ink capsules comprise a shell encapsulating a plurality of triboelectrically charged dark particles, a plurality of triboelectrically charged light particles, and a non-polar liquid.
2 more elements
Dependencies are inferred from the claim text.