Electro-magnetophoresis display
AssigneeSiPix Imaging, Inc.
InventorsJerry Chung, Rong-Chang Liang
Life of this patent
Estimating the term…
Abstract
The present invention is directed to an electro-magnetophoresis display having either the traditional up/down or dual switching mode. The display cells are filled with an electro-magnetophoretic dispersion comprising particles suspended in a solvent and the particles are both charged and magnetized. The display of the invention prevents undesired movement of the particles in the cells. The magnetic force generated by the magnetic layer(s) eliminates the need to provide cells with a threshold voltage high enough to avoid the cross talk and/or cross bias effects. In addition, the dual switching mode allows the particles to move in the up/down direction as well as the planar direction, thus providing a multicolor display of high color quality at very low cost.
Claims38
An electromagnetophoresis display, comprising
- a) a top electrode layer and a bottom electrode layer, at least one of which is transparent;
- b) an array of cells filled with electromagnetophoretic fluid comprising charged and magnetic particles dispersed in a solvent;
- and
- c) two magnetic layers.
An electromagnetophoresis display, comprising
- a) a top electrode layer and a bottom electrode layer, at least one of which is transparent;
- b) an array of cells filled with an electromagnetophoretic fluid comprising charged and magnetic particles dispersed in a solvent;
- and
- c) at least one magnetic layer;
- wherein said charged and magnetic particles are of the black color, said solvent is a clear colorless solvent, and said electromagnetophoretic fluid further comprises white or other colored particles which are non-magnetic and carry the same charged as the charged and magnetic black particles but at a different level.
Dependencies are inferred from the claim text.