Robust multi particle system for color electrophoretic displays with very low driving voltages comprising a low amount of electrolytes
US8778229B2 · kind B2 · utility
2Cited by
5References
15Claims
0Family size
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Key dates
| Filing date | May 10, 2006 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Dec 25, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/167
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophoretic dispersion with at least two particle species is proposed in which a minimal number (and concentration) of free compounds is present in solution. All chemicals needed to color and stabilize the pigment particles are preferably covalently attached to or within the particles. This enhances the robustness of the system and minimizes the conductivity of the dispersion so that the driving voltage for an electrophoretic display is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.