Electrophoretic media, and materials for use therein

US8446664B2 · kind B2 · utility

Assignee

• E Ink Holdings Inc. · TW

Inventors

• Eva Chen · Cambridge, US
• Richard M. Webber · Brookline, US
• David Darrell Miller · Wakefield, US
• Jonathan Kim Nguyen · Rockland, US

Key dates

• Filing date: Apr 4, 2011
• Grant date: May 21, 2013
• Expiry date: Jul 5, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F2202/06
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An electrophoretic medium comprises a continuous phase and a discontinuous phase. The discontinuous phase comprises a plurality of droplets, each of which comprises a fluid and at least one charged particle disposed within the fluid and capable of moving through the fluid upon application of an electric field to the electrophoretic medium. The continuous phase surrounds and encapsulates the discontinuous phase and comprising a polymeric binder and a salt, the salt having an anion containing at least one fluorine atom and having a water solubility of at least about 0.25 per cent by weight at 25° C.