Electrophoretic ink composed of particles with field dependent mobilities
US7038655B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2002 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Aug 31, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophoretic display has a viewing surface, and includes an image pixel. The image pixel includes a first plurality of particles having a first mobility, and a second plurality of particles having a second mobility. At a first addressing voltage, the first mobility is greater than the second mobility. At a second addressing voltage, the second mobility is greater than the first mobility. At least one of the first and second mobilities is a variable function of voltage, i.e., a function of an applied electric field. Application of the first addressing voltage produces a first optical state, which is determined by a motion of the first plurality of particles. Application of the second addressing voltage produces a second optical state determined by a motion of the second plurality of particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.