Formulations for improved electrophoretic display suspensions and related methods
US5403518A · kind A · utility
176Cited by
8References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1993 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Dec 2, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/167
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides an electrophoretic suspension comprising a suspension medium including tetrachloroethylene, 5-ethylidene-2-norbornene and an aromatic solvent including either a mixture of phenyl xylyl ethanes or a mixture of mono and di-benzyl toluene. The suspension further comprises a plurality of pigment particles dispersed in the suspension medium; a fluid dye dissolved in the suspension medium for providing a contrast with the pigment particles; and a charge control agent adsorbed on the pigment particles for preventing the pigment particles from agglomerating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.